http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
이새봄,이민기,양상혁,김승현,김형진,성석원,이민성,이진기 한국가시화정보학회 2018 한국가시화정보학회지 Vol.16 No.3
The surface structure of the electrospun polymer fibers depends on the polymer concentration, the type of solvent used, applied voltage and so on. To make a desired surface, it is important to understand the effects of the physicochemical properties to form a stable Taylor cone and jet dispensation. We observed the formation of Taylor cone and a consequent structure of fiber by controlling the parameters of applied voltage, solution concentration, solvent and collector effectively. Once the surfaces were fabricated, the structures were analyzed using optical imaging technologies. As the solution concentration was increased, the smooth fibers were formed. In addition, different solvent ratios determined the viscosity and the surface tension of solutions. As a result, with decreased viscosity and increased surface tension, thin fibers were obtained by electrospinning. Furthermore the aligned nanofiber was successfully created by using drum collector.
기능성 표면 제작을 위한 전기방사 섬유의 최적 구조 연구
양상혁(Sanghyeok Yang),김승현(Seunghyun Kim),김형진(HyeongJin Kim),성석원(Sukwon Sung),이민성(Minsung Lee),이진기(Jinkee Lee) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.11
Electrospinning is widely used technology which generates nano sized fibers using polymer or ceramic solutions. We used electrospinning to coat the surface with hydrophilic(PVA, TiO₂) or hydrophobic(PVDF) nano fibers. In order to find spinning condition, we observed shapes of the dispensing taylor cone and compared the morphologies of obtained surfaces using SEM to evaluate characteristics of nano-sized fibers, which is changed by voltage and solute concentration. In case of polymer electrospinning using PVA and PVDF, we added crosslinker for generating insoluble fiber. Finally we compare the contact angle on spinning surface and calculate surface energy depending on fiber’s properties.