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Developing novel thin film composite membrane on a permeate spacer backing fabric for forward osmosis

journal contribution
posted on 2020-08-01, 00:00 authored by S Sahebi, M Sheikhi, B Ramavandi, Shuaifei ZhaoShuaifei Zhao, J Baniasadi, N Fadaie, T Mohammadi
A repeatable method was introduced for developing liable flat sheet thin-film forward osmosis (FO) membranes on spacer backing fabric support. Pasting of a water-soluble polymer (Polyvinylpyrrolidone (PVP)) on the backside of the fabric was investigated to prevent the penetration of the polymer dope (Polyethersulfone (PES)) into the backing fabric during phase inversion. All samples were prepared on spacer fabric with a 250 μm in thickness. First, PVP as a water-soluble polymer was cast in 100 μm thickness on a glass plate and then the spacer fabric was pulled from the top on the pasted PVP to fill the bottom side of the fabric. The lower bottom side of the fabric was filled with PVP. This helped to limit PES polymer penetration and to achieve a thinner polymeric support layer during phase inversion. After interfacial polymerization and forming rejection, thin-film composite (TFC) FO membranes were obtained. Water flux of 17.1 Lm−2h−1 and reverse solute flux (RSF) of 9.2 g m−2h−1 were achieved when 1 M NaCl as draw solution and deionized water as feed solution (FS) were used under pressure retarded osmosis (PRO) operating mode for TFC2 sample.

History

Journal

Chemical engineering research and design

Volume

160

Pagination

326 - 334

Publisher

Elsevier

Location

Amsterdam, The Netherlands

ISSN

0263-8762

Language

eng

Publication classification

C Journal article; C1 Refereed article in a scholarly journal