膜科学与技术

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Preparation and oil-wateremulsion separation performance of functional EVOH nanofibermembrane

Authors： ZhengXiaoting, XuDandan, LuJianweiShenQingXiao Ru *

Units： College of Materials Science and Engineering, DongHua University, Shanghai 201620, China

KeyWords： polyethylene-co-polyvinyl (EVOH) nanofiber membrane pore size distribution filtration property

ClassificationCode：TQ34

year,volume(issue):pagination： 2016,36(2):20-27

Abstract：

The thermoplastic polymer nanofibers was obtained through the phase separation during extrusion melt blending, in which the dispersed phase was stretched into nanofibers after the matrix phase removed. Dispersion and deposition method were used to prepare the nanofiber based composite membrane. This kind of nanofiber membrane has the advantage of high filtration efficiency, hydrophilic, resistant to pollution for water filtration. In this paper, EVOH nanofiber membrane was firstly prepared by depositing EVOH nanofiber suspension on the PETnon-woven fabric, which was then modified by Nanocellulose crystal (NCC) to gain the composite membrane with NCCbarrier layer, EVOH intermediate layer and PET support layer. We studied the impact of nanofiberquality of unit areaonthe morphology, porosity, pore size and distribution, contact angle and water flux of EVOH nanofiber membranes. Self-made oil-water emulsion was used to evaluatethe filtration performance of EVOH nanofibercomposite membrane. The results show thatwith the increasing of nanofiberquality, the EVOH nanofiber membranes showed an increase in the porosity and a decrease in pore size and contact angle, and expressed higher water flux than the commercial micro-filtrationmembrane. It is demonstrated that EVOH nanofibercompositemembraneexhibited a higher rejection rate and stabilityof filtration flux thanunmodifiedEVOHnanofiber membrane and the commercial micro-filtration membrane for the filtration of oil and water emulsion.

Funds：

国家自然科学基金资助（No.20874010）；高等学校学科创新引智计划资助（No.111-2-01,B07024）

AuthorIntro：

郑晓婷（1991-），女，江苏省盐城市人，硕士生，从事热塑性高聚物纳米纤维膜的研究及应用，E-mail:zxt4929@163.com. *通讯作者，E-mail: xiaoru@dhu.edu.cn.

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