Membrane Science and Technology

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Preparation of PVB ultrafiltration membranes using PEG with different molecular weights as additives

Authors： SHEN Jianping, WU Qiying, LANG Wanzhong*, GUO Yajun

Units： Key Laboratory of Resource Chemistry of Ministry of Education，Shanghai Key Laboratory of Rare Earth Functional Materials，Shanghai Normal University，Shanghai 200234，China

KeyWords： Polyethylene glycol(PEG), Poly(vinyl butyral)(PVB), Ultrafiltration

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2013, 33(5):48-53

Abstract：

Poly(vinyl butyral) (PVB) ultrafiltration(UF) membranes were prepared by immerged phase-inversion process. N-methyl-2-pyrrolidone (NMP) was used as solvent. Polyethylene glycol (PEG) of four different molecular weights were used as the polymeric additives. The effects of the molecular weight of PEG on the precipitation kinetics and performances of membranes were investigated. The morphologies of membranes were analyzed by scanning electron microscope(SEM) and performances of membranes were evaluated in terms of pure water flux(PWF), protein rejection, porosity. The results showed that with the increase in molecular weight of PEG, the pore number as well as pore size in membranes increases. With increase in molecular weight of PEG from 2000 to 20000, the PWF first increases from 62.8 L•m-2•h-1 to 104 L•m-2•h-1 then decreases to 50.1 L•m-2•h-1. Furthermore, the anti-fouling property of PVB membranes becomes worse but the porosity increases with the molecular weight of PEG increasing.

Funds：

国家自然科学基金(20906062)

AuthorIntro：

沈建平（1989-），男，福建莆田人，研究生，主要研究方向：膜分离. E-mail: ipqjpshen@126.com 通讯联系人：郎万中，E-mail: wzlang@shnu.edu.cn

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