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WoS SCOPUS Document Type Document Title Abstract Authors Affiliation ResearcherID (WoS) AuthorsID (SCOPUS) Author Email(s) Journal Name JCR Abbreviation ISSN eISSN Volume Issue WoS Edition WoS Category JCR Year IF JCR (%) FWCI ⓘ FWCI Update Date WoS Citation SCOPUS Citation Keywords (WoS) KeywordsPlus (WoS) Keywords (SCOPUS) KeywordsPlus (SCOPUS) Language Publication Stage Publication Year Publication Date DOI JCR Link DOI Link WOS Link SCOPUS Link
○ ○ Article ⓘ 512-Channel Geometric Droplet-Splitting Microfluidic Device by Injection of Premixed Emulsion for Microsphere Production ⓘ We present a 512-channel geometric droplet-splitting microfluidic device that involves the injection of a premixed emulsion for microsphere production. The presented microfluidic device was fabricated using conventional photolithography and polydimethylsiloxane casting. The fabricated microfluidic device consisted of 512 channels with 256 T-junctions in the last branch. Five hundred and twelve microdroplets with a narrow size distribution were produced from a single liquid droplet. The diameter and size distribution of prepared micro water droplets were 35.29 mu m and 8.8% at 10 mL/h, respectively. Moreover, we attempted to prepare biocompatible microspheres for demonstrating the presented approach. The diameter and size distribution of the prepared poly (lactic-co-glycolic acid) microspheres were 6.56 mu m and 8.66% at 10 mL/h, respectively. To improve the monodispersity of the microspheres, we designed an additional post array part in the 512-channel geometric droplet-splitting microfluidic device. The monodispersity of the microdroplets prepared with the microfluidic device combined with the post array part exhibited a significant improvement. ⓘ Kim, Chul Min; Choi, Hye Jin; Kim, Gyu Man ⓘ Korea Polytech Univ, Dept Mech Engn, Siheung Si 15073, South Korea; Kyungpook Natl Univ, Sch Mech Engn, Daegu 41566, South Korea ⓘ Kim, Chul-Min/ABI-6131-2020 ⓘ 59316640400; 57203969417; 55664733000 ⓘ faithfulsaint@daum.net;hyejin0058@gmail.com;gyuman.kim@knu.ac.kr; ⓘ POLYMERS ⓘ POLYMERS-BASEL ⓘ 2073-4360 12 4 SCIE POLYMER SCIENCE ⓘ 2020 4.329 19.4 0.45 2025-06-25 ⓘ 6 8 premixed emulsion; droplet-splitting; microfluidics; microsphere; high throughput ⓘ PLGA MICROSPHERES; GENERATION; BREAKUP; CHIP ⓘ Droplet-splitting; High throughput; Microfluidics; Microsphere; Premixed emulsion ⓘ Biocompatibility; Drops; Emulsification; Geometry; Microfluidics; Microspheres; Silicones; Size distribution; Conventional photolithography; Liquid droplets; Micro droplets; Micro-fluidic devices; Monodispersity; Narrow size distributions; Poly(lacticco-glycolic acid) microsphere; Water droplets; Fluidic devices ⓘ English 2020 2020-04 10.3390/polym12040776 ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Review ⓘ A Review on Citric Acid as Green Modifying Agent and Binder for Wood ⓘ Citric acid (CA) can be found naturally in fruits and vegetables, particularly citrus fruit. CA is widely used in many fields but its usage as a green modifying agent and binder for wood is barely addressed. Esterification is one of the most common chemical reactions applied in wood modification. CA contains three carboxyl groups, making it possible to attain at least two esterification reactions that are required for crosslinking when reacting with the hydroxyl groups of the cell wall polymers. In addition, the reaction could form ester linkages to bring adhesivity and good bonding characteristics, and therefore CA could be used as wood binder too. This paper presents a review concerning the usage of CA as a wood modifying agent and binder. For wood modification, the reaction mechanism between wood and CA and the pros and cons of using CA are discussed. CA and its combination with various reactants and their respective optimum parameters are also compiled in this paper. As for the major wood bonding component, the bonding mechanism and types of wood composites bonded with CA are presented. The best working conditions for the CA in the fabrication of wood-based panels are discussed. In addition, the environmental impacts and future outlook of CA-treated wood and bonded composite are also considered. ⓘ Lee, Seng Hua; Tahir, Paridah Md; Lum, Wei Chen; Tan, Li Peng; Bawon, Paiman; Park, Byung-Dae; Al Edrus, Syeed SaifulAzry Osman; Abdullah, Ummi Hani ⓘ Univ Putra Malaysia, Inst Trop Forestry & Forest Prod INTROP, Serdang 43400, Selangor, Malaysia; Univ Teknol MARA, Inst Infrastruct Engn & Sustainable Management II, Shah Alam 40450, Selangor, Malaysia; Univ Malaysia Kelantan, Fac Vet Med, Kota Baharu 16100, Kelantan, Malaysia; Univ Putra Malaysia, Fac Forestry & Environm, Serdang 43400, Selangor, Malaysia; Kyungpook Natl Univ, Dept Wood & Paper Sci, Daegu 41566, South Korea ⓘ Park, Byung-Dae/ABB-1934-2020; Lum, Wei Chen/GLS-0230-2022; , Lum Wei Chen/GLS-0230-2022; PENG, TAN/K-1047-2019; Lee, Seng Hua/V-1016-2019 ⓘ 57191711306; 6507902476; 54407236700; 57216638632; 56267401500; 7402834820; 57210948965; 55315771800 ⓘ lee_seng@upm.edu.my;parida@upm.edu.my;lumweichen@outlook.com;li.peng@umk.edu.my;paiman@upm.edu.my;byungdae@knu.ac.kr;saifulazry@upm.edu.my;ummi@upm.edu.my; ⓘ POLYMERS ⓘ POLYMERS-BASEL ⓘ 2073-4360 12 8 SCIE POLYMER SCIENCE ⓘ 2020 4.329 19.4 0.91 2025-06-25 ⓘ 74 90 citric acid; esterification; binding agent; wood modification; wood composite ⓘ ESTER CROSS-LINKING; SWEET SORGHUM BAGASSE; BONDED PARTICLEBOARD; PHYSICAL-PROPERTIES; NATURAL ADHESIVE; CARBOXYLIC-ACIDS; BOARD DENSITY; SUCROSE; ESTERIFICATION; PERFORMANCE ⓘ Binding agent; Citric acid; Esterification; Wood composite; Wood modification ⓘ Chemical Bonds; Citric Acid; Citrus Fruits; Esterification; Esters; Wood; Chemical bonds; Chemical modification; Citric acid; Citrus fruits; Crosslinking; Environmental impact; Esterification; Esters; Bonded composites; Bonding characteristics; Cell wall polymers; Esterification reactions; Fruits and vegetables; Optimum parameters; Reaction mechanism; Wood-based panels; Wood ⓘ English 2020 2020-08 10.3390/polym12081692 ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Article ⓘ Correlation between the Crosslink Characteristics and Mechanical Properties of Natural Rubber Compound via Accelerators and Reinforcement ⓘ The extreme elasticity and reversible deformability of rubber, which is one of the most versatile polymers in modern society, is dependent on several factors, including the processing conditions, curing system, and types of additives used. Since the rubber's mechanical properties are influenced by the existing structural crosslinks, their correlation with the crosslink characteristics of rubber was investigated using the equilibrium swelling theory of the Flory-Rehner equation and the rubber-filler interaction theory of the Kraus equation. Herein, we examined whether the accelerator and reinforcement agent quantitatively contributed to chemical cross-linkages and rubber-filler interaction. In conclusion, the accelerator content supported the chemically crosslinked structures of the monosulfides and the disulfides in natural rubber (NR). Additionally, these results demonstrated that the mechanical properties and the thermal resistance of NR were dependent on the crosslink characteristics. The findings of this study provide an insight into the development and application of NR products for the mechanical optimization of rubber-based products. ⓘ Kim, Do Young; Park, Jae Woo; Lee, Dong Yun; Seo, Kwan Ho ⓘ Kyungpook Natl Univ, Dept Polymer Sci & Engn, Daegu 41566, South Korea ⓘ ; , Do Young Kim/AAB-1459-2021 ⓘ 56802861000; 57222515659; 57211001605; 7201838965 ⓘ ddyykk9655@gmail.com;yellon3375@gmail.com;dongyunlee@knu.ac.kr;khseo@knu.ac.kr; ⓘ POLYMERS ⓘ POLYMERS-BASEL ⓘ 2073-4360 12 9 SCIE POLYMER SCIENCE ⓘ 2020 4.329 19.4 5.09 2025-06-25 ⓘ 134 152 natural rubber; crosslink characteristics; mechanical properties; thermal aging; accelerator; reinforcement agent ⓘ CARBON-BLACK; STRUCTURAL-CHARACTERIZATION; SULFUR VULCANIZATION; BUTADIENE RUBBER; FILLER; BEHAVIOR ⓘ Accelerator; Crosslink characteristics; Mechanical properties; Natural rubber; Reinforcement agent; Thermal aging ⓘ Additives; Crosslinking; Curing; Fillers; Mechanical properties; Rubber industry; Rubber products; Sulfur compounds; Cross linkages; Crosslinked structures; Curing system; Development and applications; Equilibrium swelling; Filler interaction; Mechanical optimization; Processing condition; Reinforcement ⓘ English 2020 2020-09 10.3390/polym12092020 ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Article ⓘ Detoxification Properties of Guanidinylated Chitosan Against Chemical Warfare Agents and Its Application to Military Protective Clothing ⓘ This study investigates the detoxification properties of guanidinylated chitosan against chemical warfare agents and its application to the preparation of military protective clothing. Guanidinylated chitosan was synthesized by chitosan guanidinylation with cyanamide. The detoxification properties of the guanidinylated chitosan were then evaluated using a chemical warfare agent simulant, called diisopropylfluorophosphate (DFP). Cotton fabric was treated with 1 wt.% of guanidinylated chitosan in acetic acid and water solution using the simple and conventional textile treatment method of pad-dry-cure. The detoxification properties of the guanidinylated chitosan-treated cotton fabric were evaluated to investigate the application of guanidinylated chitosan to the preparation of military protective clothing. Subsequently, 71.3% of DFP was hydrolyzed to non-hazardous diisopropylhydrogenphosphate (DHP) in 2 h because of the base organocatalytic activity of 0.02 g guanidinylated chitosan itself. Moreover, 60.1% of DFP was hydrolyzed by the catalytic activity of the guanidinylated chitosan-treated cotton fabric, which contained only 0.0002 g of guanidinylated chitosan. This result shows that the guanidinylated chitosan itself has detoxification properties for hydrolyzing DFP to DHP, and its detoxification properties can be more efficient when applied to cotton fabric because it showed 84.3% of the detoxification properties with only 1 wt.% of guanidinylated chitosan. For the first time, this study shows that guanidinylated chitosan has considerable detoxification properties and can be used as an agent to prepare protective clothing. ⓘ Kwon, Woong; Jeong, Euigyung ⓘ Kyungpook Natl Univ, Dept Text Syst Engn, Daegu 41566, South Korea ⓘ ⓘ 57208867074; 35885596300 ⓘ kwoong7242@naver.com;wolfpack@knu.ac.kr; ⓘ POLYMERS ⓘ POLYMERS-BASEL ⓘ 2073-4360 12 7 SCIE POLYMER SCIENCE ⓘ 2020 4.329 19.4 0.39 2025-06-25 ⓘ 18 19 guanidine; guanidinylated chitosan; protective clothes; chemical warfare agent; diisopropylfluorophosphate ⓘ ORGANOPHOSPHORUS COMPOUNDS; ANTIMICROBIAL ACTIVITY; INFRARED-SPECTROSCOPY; DEGRADATION ⓘ Chemical warfare agent; Diisopropylfluorophosphate; Guanidine; Guanidinylated chitosan; Protective clothes ⓘ Catalyst activity; Chemical activation; Chemical warfare; Cotton; Cotton fabrics; Detoxification; Hosiery manufacture; Hydrolysis; Protective clothing; Chemical warfare agent simulant; Chemical warfare agents; Diisopropylfluorophosphate; ITS applications; Organocatalytic; Textile treatment; Warfare agents; Water solutions; Chitosan ⓘ English 2020 2020-07 10.3390/polym12071461 ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Article ⓘ Development of Method Enhanced Laser Ablation Efficiency According to Fine Curvature of the Polymer through the Preliminary Preparation Process Using UV Picosecond Laser ⓘ In processes using the ultrashort pulsed laser, the phenomenon that the ablation efficiency is reduced due to the increase of the shielding effect of the generated plume is increasingly caused by the use of the high power and high repetition rate. A new method is needed to prevent a decrease in ablation efficiency in processing using an ultrashort pulsed laser. In this study, the proposed a processing method that can improve the ablation efficiency by providing an efficient escape path of plume, and examine the feasibility of a new processing method. The new method we proposed is a method of laser processing after generating a fine curvature in the polymer as a preliminary preparation. The fine curvature of the polymer produced by the preliminary preparation induces an artificial chimney-like opening along the path of the incident beam during laser processing, thereby enabling the plume to be effectively removed. The experiment for examine the feasibility through a new method was conducted using a 10-picosecond laser of UV wavelength with two optical systems. As a new processing method, when processing with ultrashort pulse laser, it was observed that the ablation efficiency improved. ⓘ Ham, Seung Sik; Lee, Ho ⓘ Kyungpook Natl Univ, Inst Nanophoton Applicat, 80 Daehak Ro, Daegu 41566, South Korea; Kyungpook Natl Univ, Sch Mech Engn, 80 Daehak Ro, Daegu 41566, South Korea; Kyungpook Natl Univ, Laser Applicat Ctr, 70 Dongnae Ro, Daegu 41061, South Korea ⓘ ⓘ 57205454263; 26660670700 ⓘ ssh13@knu.ac.kr;holee@knu.ac.kr; ⓘ POLYMERS ⓘ POLYMERS-BASEL ⓘ 2073-4360 12 4 SCIE POLYMER SCIENCE ⓘ 2020 4.329 19.4 0.19 2025-06-25 ⓘ 4 5 picosecond pulse laser; fine curvature of polymer; enhanced laser ablation efficiency; artificial chimney; laser ablation ⓘ ULTRAVIOLET; ABSORPTION ⓘ Artificial chimney; Enhanced laser ablation efficiency; Fine curvature of polymer; Laser ablation; Picosecond pulse laser ⓘ Ablation; Efficiency; Laser ablation; Picosecond lasers; Polymers; Ablation efficiency; High repetition rate; Incident beams; Laser process; Preparation process; Processing method; Shielding effect; Ultrashort-pulsed laser; Pulsed lasers ⓘ English 2020 2020-04 10.3390/polym12040959 ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Article ⓘ Double-Crosslinked Polyurethane Acrylate for Highly Conductive and Stable Polymer Electrolyte ⓘ High ionic conductivity and good stability are major factors that influence the use of polymer electrolytes in electrochemical storage and conversion devices. In this study, we present polyurethane acrylate (PUA) membranes having enhanced ionic conductivity and swelling stability by double crosslinking the polyurethane (PU) and polyacrylate (PA) compartments. The crosslinking agent concentration was varied to control their mechanical properties, swelling stability, and ionic conductivity. Under optimum conditions, the electrolyte uptake of the double-crosslinked PUA membranes without notable defects was 245%. The maximum ionic conductivity of these membranes reached 9.6 mS/cm, which was higher than those with respect to most of the previously reported PUA- or PU-based polymer electrolytes. ⓘ Kim, Han-Na; Kim, Kyung-Geun; Jeong, Yeon Uk; Kim, Sung Yeol ⓘ Kyungpook Natl Univ, Sch Mech Engn, Daegu 41566, South Korea; Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea ⓘ Kim, Kipoong/IFT-8155-2023; kim, sung/D-1412-2013 ⓘ 55268932100; 56991540300; 35324325200; 19337822900 ⓘ gks9575@naver.com;kimkg.me@gmail.com;jeong@knu.ac.kr;sykimknu@knu.ac.kr; ⓘ POLYMERS ⓘ POLYMERS-BASEL ⓘ 2073-4360 12 11 SCIE POLYMER SCIENCE ⓘ 2020 4.329 19.4 0.45 2025-06-25 ⓘ 6 8 polyurethane acrylate; polymer electrolyte; ionic conductivity; stability ⓘ IONIC-CONDUCTIVITY; LITHIUM; MICROSTRUCTURE; HYDROGEL; LINKING ⓘ Ionic conductivity; Polymer electrolyte; Polyurethane acrylate; Stability ⓘ Ionic conductivity; Polyurethanes; Cross linking agents; Crosslinked polyurethane; Double crosslinking; Electrochemical storage; Optimum conditions; Polymer electrolyte; Polyurethane acrylates; Stable polymers; Polyelectrolytes ⓘ English 2020 2020-11 10.3390/polym12112557 ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Article ⓘ Effect of PMMA/Silica Hybrid Particles on Interfacial Adhesion and Crystallization Properties of Poly(lactic acid)/Block Acrylic Elastomer Composites ⓘ Poly(lactic acid) (PLA) is a relatively brittle polymer, and its low melt strength, ductility, and thermal stability limit its use in various industrial applications. This study aimed to investigate the effect of poly(methyl methacrylate) (PMMA) and PMMA/silica hybrid particles on the mechanical properties, interfacial adhesion, and crystallization behavior of PLA/block acrylic elastomer. PLA/block acrylic elastomer blends exhibit improved flexibility; however, phase separation occurs between PLA and block acrylic elastomer domains. Valid time-temperature superposition (TTS) measurements of viscoelastic behavior were obtained and exhibited interfacial adhesion with the addition of PMMA or PMMA/silica in PLA/block acrylic elastomer blends. In particular, the phase separation temperature was increased by the incorporation of PMMA/silica hybrid particles, which suggests a potential role for these particles in improving the phase stability. In addition, PMMA inhibits crystallization, while PMMA/silica acts as a nucleating agent, thus increasing the crystallization rate and crystallinity degree. ⓘ Kim, Gi Hong; Hwang, Sung Wook; Jung, Bich Nam; Kang, DongHo; Shim, Jin Kie; Seo, Kwan Ho ⓘ Korea Inst Ind Technol, Korea Packaging Ctr, Bucheon 14449, South Korea; Keimyung Univ, Dept Chem Engn, Daegu 42601, South Korea; Korea Univ, Dept Chem & Biol Engn, Seoul 02841, South Korea; Kyungpook Natl Univ, Dept Polymer Sci & Engn, Daegu 41566, South Korea ⓘ Kang, Dongho/AAS-4487-2021 ⓘ 56803019000; 57223746915; 57193491220; 57077537300; 7201856375; 7201838965 ⓘ kakamate@kitech.re.kr;swhwang@kmu.ac.kr;jbn5666@kitech.re.kr;kangppp@kitech.re.kr;jkshim@kitech.re.kr;khseo@knu.ac.kr; ⓘ POLYMERS ⓘ POLYMERS-BASEL ⓘ 2073-4360 12 10 SCIE POLYMER SCIENCE ⓘ 2020 4.329 19.4 0.32 2025-06-25 ⓘ 7 8 poly(lactic acid); PMMA; silica hybrid particles; block acrylic elastomer ⓘ L-LACTIC ACID; PHASE-SEPARATION; SILICATE NANOCOMPOSITES; VISCOELASTIC BEHAVIOR; ENTANGLEMENT NETWORK; MOLECULAR-WEIGHT; POLYMER BLENDS; MELT RHEOLOGY; KINETICS; POLYLACTIDE ⓘ Block acrylic elastomer; PMMA/silica hybrid particles; Poly(lactic acid) ⓘ Adhesion; Crystallinity; Crystallization; Elastomers; Esters; Lactic acid; Plastics; Polypropylenes; Crystallization behavior; Crystallization properties; Crystallization rates; Interfacial adhesions; Phase separation temperatures; Poly(methyl methacrylate) (PMMA); Time temperature superposition; Visco-elastic behaviors; Phase separation ⓘ English 2020 2020-10 10.3390/polym12102231 ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Article ⓘ Effect of Rolling and Coiling Temperatures on Microstructure and Mechanical Properties of Medium-Carbon Pipeline Steel ⓘ Oil country tubular goods (OCTG) steels with a low yield ratio (yield strength/tensile strength) and excellent impact toughness have recently been demanded to ensure mining performance and safety. From this viewpoint, the optimization of the manufacturing conditions is important because they influence the microstructure and mechanical properties of the steels; in particular, in the case of OCTG steels with carbon contents greater than 0.2 wt%, the finishing mill temperature (FMT) and coiling temperature (CT) strongly affect the microstructure of the final products, which are generally composed of ferrite and pearlite phases. In this study, 0.39C-0.23Si-1.56Mn-0.11Cr steel plates were fabricated under various FMT and CT conditions and their yield strength, tensile strength, and impact energy were investigated. In addition, pipes with diameters of 244 and 508 mm were manufactured via an electric resistance welding method using two of these strips fabricated under two different optimized conditions [(1) FMT = 880 degrees C and CT = 630 degrees C and (2) FMT = 800 degrees C and CT = 690 degrees C] to analyze the change in mechanical properties induced by the work-hardening effect during the piping process. The results revealed that the FMT and CT are closely related to the volume fraction of the ferrite phase, the grain size and lamellar spacing of the pearlite phase, and the tensile and impact properties of the steel strips; the variations in the microstructure and mechanical properties with the FMT and CT were also discussed in detail. ⓘ Kim, Hyung Lae; Bang, Sung Hwan; Choi, Jong Min; Tak, Nae Hyung; Lee, Sang Won; Park, Sung Hyuk ⓘ KAERI, Maritime Reactor Fuel Dev Team, Daejeon 34057, South Korea; Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 08826, South Korea; Hyundai Steel, Plate Dev Dept, Dangjin 31719, South Korea; Korea Res Inst Stand & Sci, Div Ind Metrol, Daejeon 34113, South Korea; Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea ⓘ Lee, Sangwon/AAJ-7850-2020; Park, Sung-Hyuk/AAE-6726-2022 ⓘ 57191363167; 58384219500; 56991604500; 12796394700; 57201375104; 54786002500 ⓘ sh.park@knu.ac.kr; ⓘ METALS AND MATERIALS INTERNATIONAL ⓘ MET MATER INT ⓘ 1598-9623 2005-4149 26 12 SCIE MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING ⓘ 2020 3.642 19.4 0.73 2025-06-25 ⓘ 11 10 OCTG; Medium-carbon steel; Coiling temperature; Finishing mill temperature; Microstructure ⓘ PHASE-CHANGE; PEARLITE; BEHAVIOR; KINETICS; STRENGTH ⓘ Coiling temperature; Finishing mill temperature; Medium-carbon steel; Microstructure; OCTG ⓘ Chromium steel; Ferrite; Impact strength; Microstructure; Pearlite; Resistance welding; Steel pipe; Strain hardening; Structural panels; Tensile strength; Yield stress; Carbon pipeline steel; Coiling temperature; Hardening effects; Manufacturing conditions; Microstructure and mechanical properties; Oil country tubular goods; Optimized conditions; Tensile and impact properties; Manganese steel ⓘ English 2020 2020-12 10.1007/s12540-019-00500-2 ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Article ⓘ Effects of a Dielectric Barrier Discharge (DBD) on Characteristics of Polyaniline Nanoparticles Synthesized by a Solution Plasma Process with an Ar Gas Bubble Channel ⓘ The quality of polyaniline nanoparticles (PANI NPs) synthesized in plasma polymerization depends on the discharge characteristics of a solution plasma process (SPP). In this paper, the low temperature dielectric barrier discharge (DBD) is introduced to minimize the destruction of aniline molecules induced by the direct current (DC) spark discharge. By adopting the new electrode structure coupled with a gas channel, a low temperature DBD is successfully implemented in a SPP, for the first time, thus inducing an effective interaction between the Ar plasma and aniline monomer. We examine the effects of a low temperature DBD on characteristics of polyaniline nanoparticles synthesized by a SPP with an Ar gas bubble channel. As a result, both carbonization of aniline monomer and erosion of the electrode are significantly reduced, which is confirmed by analyses of the synthesized PANI NPs. ⓘ Shin, Jun-Goo; Shin, Bhum Jae; Jung, Eun Young; Park, Choon-Sang; Kim, Jae Young; Tae, Heung-Sik ⓘ Kyungpook Natl Univ, Coll It Engn, Sch Elect Engn, Daegu 41566, South Korea; Sejong Univ, Dept Elect Engn, Seoul 05006, South Korea; Kansas State Univ, Coll Engn, Dept Elect & Comp Engn, New York, NY 66506 USA; Daegu Gyeongbuk Inst Sci & Technol, Dept New Biol, Daegu 42988, South Korea ⓘ ; Shin, BhumJae/AEV-2572-2022 ⓘ 57202231746; 7103027782; 57203199724; 16025295400; 57205191453; 7006298844 ⓘ bmw345@ee.knu.ac.kr;hahusbj@sejong.ac.kr;eyjung@knu.ac.kr;purplepcs@ksu.edu;jyk@dgist.ac.kr;hstae@ee.knu.ac.kr; ⓘ POLYMERS ⓘ POLYMERS-BASEL ⓘ 2073-4360 12 9 SCIE POLYMER SCIENCE ⓘ 2020 4.329 19.4 0.26 2025-06-25 ⓘ 9 9 solution plasma; polyaniline nanoparticle; dielectric barrier discharge; polymerization; gas bubble channel ⓘ POLYMERIZATION; NANOSTRUCTURES; NANOCOMPOSITE; NANOFIBERS ⓘ Dielectric barrier discharge; Gas bubble channel; Polyaniline nanoparticle; Polymerization; Solution plasma ⓘ Aniline; Argon; Bubbles (in fluids); Carbonization; Dielectric materials; Electric discharges; Electrodes; Flow control; Monomers; Nanoparticles; Plasma polymerization; Polyaniline; Synthesis (chemical); Temperature; Aniline molecules; Dielectric barrier discharges; Discharge characteristics; Effective interactions; Electrode structure; Low temperatures; Polyaniline nanoparticles; Solution plasma process; Dielectric devices ⓘ English 2020 2020-09 10.3390/polym12091939 ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Article ⓘ Electrically Conductive Nanocomposites Composed of Styrene-Acrylonitrile Copolymer and rGO via Free-Radical Polymerization ⓘ The polymerizable reduced graphene oxide (mRGO) grafted styrene-acrylonitrile copolymer composites were prepared via free radical polymerization. The graphene oxide (GO) and reduced graphene oxide (rGO) was reacted with 3-(tri-methoxysilyl)propylmethacrylate (MPS) and used as monomer to graft styrene and acrylonitrile on its surface. The successful modification and reduction of GO was confirmed using Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analyzer (TGA), Raman and X-ray diffraction (XRD). The mRGO was prepared using chemical and solvothermal reduction methods. The effect of the reduction method on the composite properties and nanosheet distribution in the polymer matrix was studied. The thermal stability, electrical conductivity and morphology of nanocomposites were studied. The electrical conductivity of the obtained nanocomposite was very high at 0.7 S/m. This facile free radical polymerization provides a convenient route to achieve excellent dispersion and electrically conductive polymers. ⓘ Ko, Eun Bin; Lee, Dong-Eun; Yoon, Keun-Byoung ⓘ Kyungpook Natl Univ, Dept Polymer Sci & Engn, Daegu 41566, South Korea; Kyungpook Natl Univ, Sch Architecture & Civil Engn, Daegu 41566, South Korea ⓘ ⓘ 57139806500; 56605563300; 7401607550 ⓘ ebko@naver.com;dolee@knu.ac.kr;kbyoon@knu.ac.kr; ⓘ POLYMERS ⓘ POLYMERS-BASEL ⓘ 2073-4360 12 6 SCIE POLYMER SCIENCE ⓘ 2020 4.329 19.4 0.26 2025-06-25 ⓘ 5 5 polymerizable reduced graphene oxide; in situ polymerization; electrical conductivity; dispersion of 2D nanosheets ⓘ REDUCED GRAPHENE OXIDE; MECHANICAL-PROPERTIES; ENHANCEMENT ⓘ Dispersion of 2D nanosheets; Electrical conductivity; In situ polymerization; Polymerizable reduced graphene oxide ⓘ Atom transfer radical polymerization; Conducting polymers; Electric conductivity of solids; Fourier transform infrared spectroscopy; Free radicals; Grafting (chemical); Graphene; Morphology; Polymer matrix composites; Reduced Graphene Oxide; Styrene; Electrical conductivity; Electrically conductive; Electrically conductive polymers; Fourier transform infra red (FTIR) spectroscopy; Reduced graphene oxides (RGO); Solvothermal reduction; Styrene-acrylonitrile copolymers; Thermogravimetric analyzers; Free radical polymerization ⓘ English 2020 2020-06 10.3390/polym12061221 ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Article ⓘ Extrusion Characteristics of Thin Walled Tubes for Catheters Using Thermoplastic Elastomer ⓘ As the market for minimally invasive surgery has grown, the demand for high-precision and high-performance catheters has increased. Catheters for the diagnosis and treatment of cardiovascular or cerebrovascular disease mainly use a braided wire tube with a polymer inner liner and outer jacket to improve the pushability and trackability. The outer jacket should have an accurate inner and outer diameter and while maintaining a wall thickness of 150 mu m or less. In this study, we designed and manufactured a tip and die capable of extruding an outer jacket with a wall thickness of 150 mu m or less using a medical thermoplastic elastomer for manufacturing 8Fr (2.64 mm diameter) thin-walled tubes. The ovality and inner/outer diameters of the tube were studied according to changes in the screw speed (mass flow rate), puller speed, air pressure applied to the lumen, and distance between the quench and head, which are the main variables of microextrusion processes. The screw speed (mass flow rate), puller speed, and air pressure affected the inner/outer diameter of the tube, with screw speed and puller speed having the largest influence on diameter. The air pressure and distance between quench and head had the greatest influence on ovality. The results show the effect of different processing parameters on the characteristics of the extruded tube, which will help to establish a stable extrusion process for the manufacture of outer jackets for braided catheter shafts. ⓘ Cho, Soonmo; Lee, Euntaek; Jo, Seunggi; Kim, Gyu Man; Kim, Woojin ⓘ Korea Inst Ind Technol, Safety Syst R&D Grp, 320 Techno Sunhwan Ro, Dalseong Gun 711880, Daegu, South Korea; Kyungpook Natl Univ, Sch Mech Engn, 1370 Sangyuk Dong, Daegu 702701, South Korea; Kumoh Natl Inst Technol, Mech Syst Engn, 61 Daehak Ro, Gumi Si 39177, Gyeongsangbuk D, South Korea ⓘ ⓘ 57218545539; 55362847300; 57218193999; 55664733000; 57210398468 ⓘ holmes92@kitech.re.kr;euntaek@kumoh.ac.kr;wessan@kitech.re.kr;gyuman.kim@knu.ac.kr;woojinkim@kitech.re.kr; ⓘ POLYMERS ⓘ POLYMERS-BASEL ⓘ 2073-4360 12 8 SCIE POLYMER SCIENCE ⓘ 2020 4.329 19.4 0.84 2025-06-25 ⓘ 20 20 polymer extrusion; thermoplastic elastomer; catheter; thin walled tube ⓘ DESIGN; POLYPROPYLENE; SWELL; DIES ⓘ Catheter; Polymer extrusion; Thermoplastic elastomer; Thin walled tube ⓘ Atmospheric pressure; Catheters; Diagnosis; Elastomers; Extrusion; Mass transfer; Processing; Reinforced plastics; Screws; Speed; Thin walled structures; Cerebrovascular disease; Extrusion characteristic; Extrusion process; High-precision; Minimally invasive surgery; Outer diameters; Processing parameters; Thin walled tubes; Tubes (components) ⓘ English 2020 2020-08 10.3390/polym12081628 ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Article ⓘ Fabrication of Robust Superhydrophobic Surfaces with Dual-Curing Siloxane Resin and Controlled Dispersion of Nanoparticles ⓘ We developed a simple method for the fabrication of superhydrophobic surfaces on various substrates using spray coating. The fabrication method started with the blending of a modified hydrophobic siloxane binder, silica nanoparticles, and a volatile solvent by sonication. The mixture was spray-coated on various surfaces such as slide glass, paper, metal and fabric, forming a rough surface comprising silica particles dispersed in a hydrophobic binder. Surface hydrophobicity was affected by the surface energy of the binder and the degree of roughness. Therefore, we realized a superhydrophobic surface by controlling these two factors. The hydrophobicity of the siloxane binder was determined by the treatment of fluorine silane; the roughness was controlled by the amount of coated materials and sonication time. Thus, using the spray coating method, we obtained a superhydrophobic surface that was mechanically durable, thermally stable, and chemically resistant. ⓘ Kim, Hyeran; Nam, Kibeom; Lee, Dong Yun ⓘ Kyungpook Natl Univ, Dept Polymer Sci & Engn, Daegu 41566, South Korea ⓘ ⓘ 57218098814; 57210467782; 57211001605 ⓘ rwnka110@naver.com;ska2918@naver.com;dongyunlee@knu.ac.kr; ⓘ POLYMERS ⓘ POLYMERS-BASEL ⓘ 2073-4360 12 6 SCIE POLYMER SCIENCE ⓘ 2020 4.329 19.4 0.97 2025-06-25 ⓘ 19 22 superhydrophobic coating; spray coating; robustness and stability; nanoparticles ⓘ COATINGS; FILM ⓘ Nanoparticles; Robustness and stability; Spray coating; Superhydrophobic coating ⓘ Blending; Coated materials; Coatings; Fabrication; Nanoparticles; Silica; Silica nanoparticles; Substrates; Superhydrophobicity; Surface properties; Dispersion of nano particles; Fabrication method; Robust superhydrophobic surfaces; Super-hydrophobic surfaces; Surface hydrophobicity; Thermally stable; Various substrates; Volatile solvents; Surface roughness ⓘ English 2020 2020-06 10.3390/polym12061420 ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Article ⓘ Facile Fabric Detoxification Treatment Method Using Microwave and Polyethyleneimine Against Nerve Gas Agents ⓘ Generally, detoxification fabrics are defined as fabrics that remove or inhibit the production of toxic compounds, especially chemical warfare agents such as nerve gas agents. They are usually prepared using a complicated and time-consuming method. This study suggests a facile treatment method for preparing detoxification fabrics against nerve gas agents using polyethyleneimine and microwave curing. The detoxification properties of polyethyleneimine and microwave-treated polypropylene nonwoven fabric were evaluated using diisopropylfluoro-phosphate, which is a nerve agent simulant. The treated polypropylene fabric decontaminated 53.6% of diisopropylfluorophosphate (DFP) in 2 h at 32 degrees C, and the half-life of DFP on the surface of the treated fabric was 122 min. The result indicates that the treated fabric can act as a basic organocatalyst for the DFP hydrolysis and has a shorter half-life owing to the large number of amine groups. Therefore, the facile treatment method has the potential for use in the preparation of detoxification fabrics. ⓘ Kwon, Woong; Kim, Changkyu; Kim, Jiyun; Kim, Jongwon; Jeong, Euigyung ⓘ Kyungpook Natl Univ, Dept Text Syst Engn, Daegu 41566, South Korea; Yeungnam Univ, Dept Fiber Syst Engn, Gyongsan 38541, South Korea ⓘ ⓘ 57208867074; 57220131199; 57865580600; 56263936700; 35885596300 ⓘ kwoong7242@naver.com;se02126000@gmail.com;k1m.j2.y00n@gmail.com;kjwfiber@ynu.ac.kr;wolfpack@knu.ac.kr; ⓘ POLYMERS ⓘ POLYMERS-BASEL ⓘ 2073-4360 12 12 SCIE POLYMER SCIENCE ⓘ 2020 4.329 19.4 0 2025-06-25 ⓘ 1 0 polyethyleneimine; detoxification fabrics; nerve agent; diisopropylfluorophosphate ⓘ CHEMICAL WARFARE AGENTS; HYDROLYSIS ⓘ Detoxification fabrics; Diisopropylfluorophosphate; Nerve agent; Polyethyleneimine ⓘ Chemical warfare; Polypropylenes; Chemical warfare agents; Diisopropylfluorophosphate; Microwave curing; Nerve agent simulants; Polyethyleneimine; Polypropylene fabric; Polypropylene nonwoven fabrics; Treatment methods; Detoxification ⓘ English 2020 2020-12 10.3390/polym12122861 ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Article ⓘ Improvement in Mechanical Properties of Rolled AZ31 Alloy Through Combined Addition of Ca and Gd ⓘ In this study, the effects of the combined addition of Ca and Gd on the microstructure and mechanical properties of rolled Mg alloys are investigated by the addition of 0.5 wt% Ca and 0.5 wt% Gd to a commercial AZ31 alloy. The combined addition of Ca and Gd leads to the formation of undissolved second phases such as Al2Ca and Al2Gd, which promote dynamic recrystallization during rolling via the particle-stimulated nucleation phenomenon. As a result, the rolled AZ31-0.5Ca-0.5Gd (wt%) (AZXG3100) alloy shows a finer recrystallized grain structure than the rolled AZ31 alloy; the average grain size of the former (11.9 mu m) is considerably smaller than that of the latter (22.4 mu m). The combined addition of Ca and Gd improves the tensile yield strength of the rolled material from 131 to 144 MPa, which is attributed mainly to the combined effects of Hall-Petch hardening enhanced by grain refinement and dispersion hardening induced by the undissolved particles. The tensile elongation of the rolled material also increases from 14.6 to 18.3% upon the combined addition of Ca and Gd, because the activation of twinning during tension is less pronounced in the rolled AZXG3100 alloy owing to its smaller grain size. These results demonstrate that the combined addition of Ca and Gd simultaneously improves the tensile strength and ductility of the rolled AZ31 alloy. ⓘ Go, Jongbin; Lee, Jong Un; Moon, Byoung Gi; Yoon, Jonghun; Park, Sung Hyuk ⓘ Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea; Korea Inst Mat Sci, Implementat Res Div, Chang Won 51508, South Korea; Hanyang Univ, Dept Mech Engn, Ansan 15588, South Korea ⓘ ; Park, Sung-Hyuk/AAE-6726-2022 ⓘ 57204606110; 57195056728; 7101878674; 56449838900; 54786002500 ⓘ sh.park@knu.ac.kr; ⓘ METALS AND MATERIALS INTERNATIONAL ⓘ MET MATER INT ⓘ 1598-9623 2005-4149 26 12 SCIE MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING ⓘ 2020 3.642 19.4 1.06 2025-06-25 ⓘ 18 18 Magnesium; Ca and Gd addition; Rolling; Microstructure; Mechanical properties ⓘ DEFORMATION; MICROSTRUCTURE; TEMPERATURE; BEHAVIOR; TEXTURE; CALCIUM; SIZE ⓘ Ca and Gd addition; Magnesium; Mechanical properties; Microstructure; Rolling ⓘ Aluminum alloys; Binary alloys; Calcium; Calcium alloys; Dispersion hardening; Dynamic recrystallization; Grain refinement; Grain size and shape; Magnesium alloys; Tensile strength; Average grain size; Combined effect; Microstructure and mechanical properties; Particle stimulated nucleation; Recrystallized grains; Strength and ductilities; Tensile elongation; Tensile yield strength; Gadolinium alloys ⓘ English 2020 2020-12 10.1007/s12540-019-00591-x ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Article ⓘ Influences of Absorbed Dose Rate on the Mechanical Properties and Fiber-Matrix Interaction of High-Density Polyethylene-Based Carbon Fiber Reinforced Thermoplastic Irradiated by Electron-Beam ⓘ In this study, a high-density polyethylene (HDPE)-based carbon fiber-reinforced thermoplastic (CFRTP) was irradiated by an electron-beam. To assess the absorbed dose rate influence on its mechanical properties, the beam energy and absorbed dose were fixed, while the absorbed dose rates were varied. The tensile strength (TS) and Young's modulus (YM) were evaluated. The irradiated CFRTP TS increased at absorbed dose rates of up to 6.8 kGy/s and decreased at higher rates. YM showed no meaningful differences. For CFRTPs constituents, the carbon fiber (CF) TS gradually increased, while the HDPE TS decreased slightly as the absorbed dose rates increased. The OH intermolecular bond was strongly developed in irradiated CFRTP at low absorbed dose rates and gradually declined when increasing those rates. X-ray photoelectron spectroscopy analysis revealed that the oxygen content of irradiated CFRTPs decreased with increasing absorbed dose rate due to the shorter irradiation time at higher dose rates. In conclusion, from the TS viewpoint, opposite effects occurred when increasing the absorbed dose rate: a favorable increase in CF TS and adverse decline of attractive hydrogen bonding interactions between HDPE and CF for CFRTPs TS. Therefore, the irradiated CFRTP TS was maximized at an optimum absorbed dose rate of 6.8 kGy/s. ⓘ Park, Se Kye; Choi, Dong Yun; Choi, Du Young; Lee, Dong Yun; Yoo, Seung Hwa ⓘ Korea Inst Ind Technol, Daegyeong Div, Yeongcheon 38822, Gyeongsangbuk D, South Korea; Kyungpook Natl Univ, Dept Polymer Sci & Engn, Daegu 41566, Gyeongsangbuk D, South Korea; Korea Inst Ind Technol, Carbon Mat Applicat R&D Grp, Jeonju 54853, Jeollabuk Do, South Korea; Jeonbuk Natl Univ, Dept Quantum Syst Engn, Coll Engn, Jeonju 54896, Jeollabuk Do, South Korea ⓘ Choi, Dong Yun/HRD-1551-2023 ⓘ 57210575824; 55566743200; 57220892147; 57211001605; 57190001859 ⓘ sekye@kitech.re.kr;dychoi311@kitech.re.kr;duychoi@kitech.re.kr;dongyunlee@knu.ac.kr;seunghwayoo@jbnu.ac.kr; ⓘ POLYMERS ⓘ POLYMERS-BASEL ⓘ 2073-4360 12 12 SCIE POLYMER SCIENCE ⓘ 2020 4.329 19.4 0.26 2025-06-25 ⓘ 6 6 electron-beam irradiation; absorbed dose rate; carbon fiber-reinforced thermoplastic; tensile strength; fiber– matrix interaction ⓘ RADIATION-INDUCED OXIDATION; CROSS-LINKING; HYDROGEN-BONDS; COMPOSITES; BEHAVIOR; STRENGTH; OXIDE ⓘ Absorbed dose rate; Carbon fiber-reinforced thermoplastic; Electron-beam irradiation; Fiber–matrix interaction; Tensile strength ⓘ Aliphatic compounds; Electron beams; Fiber reinforced plastics; Fibers; Graphite fibers; High density polyethylenes; Hydrogen bonds; Tensile strength; X ray photoelectron spectroscopy; Absorbed dose rate; Beam energies; Carbon fiber reinforced; High density polyethylene(HDPE); Hydrogen bonding interactions; Intermolecular bonds; Irradiation time; Oxygen content; Density (specific gravity) ⓘ English 2020 2020-12 10.3390/polym12123012 ⓘ 바로가기 바로가기 바로가기 바로가기
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