121st General Meeting of the KCS

Type Poster Presentation
Area Material Chemistry
Room No. Event Hall
Time 4월 20일 (금요일) 11:00~12:30
Code MAT.P-534
Subject Fabrication and characteristics of a water barrier membrane filter based on zeolite/PVDF-PVP core-shell nanofibers
Authors Sang Hyun Ji, Ji Sun Yun1,*
Korea Institute of Ceramic Engineering and Technology, Yonsei University, Korea
1Korea Institute of Ceramic Engineering and Technology, Korea
Abstract For the fabrication of a flexible water barrier membrane filter, the as-spun zeolite nanofibers with structures in which the zeolite particles are embedded in the poly(vinylidene fluoride)(PVDF)-polyvinylpyrrolidone(PVP) core-shell nanofiber mats were prepared by an electrospinning method. For increasing the specific surface area, zeolite particles were exposed on the surface of the nanofibers by a wet etching process of PVP polymer in the shell parts. Furthermore, PVDF polymer in the core parts acted as a skeleton of nanofibers and contributed to maintain the flexibility of the nanofibers after etching process. To improve hydrophobicity of zeolite nanofibers, the zeolite nanofibers were fabricated with the different SiO2/Al2O3 ratios of zeolites and with the different PVDF/PVP ratios. The morphology of the partially etched polymer surface of the flexible zeolite nanofiber was observed by FE-SEM and FE-TEM analysis, and the specific surface area of the flexible zeolite nanofibers was measured by N2 adsorption/desorption isotherms. The contact angle, water permeability and air permeability of the flexible zeolite nanofibers were investigated to evaluate the properties for water barrier membrane filter.
E-mail sanghyun_ji@kicet.re.kr