Membrane Science and Technology

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Fabrication of multi-layer composite membranes by increasing the adhesive force of the PDMS gutter layer

Authors： ZHANG Xu, MENG Lingpeng, LI Pei*

Units： College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, China, 100029

KeyWords： PDMS; Pebax; multi-layer composite membrane, CO2 separation

ClassificationCode：TQ31

year,volume(issue):pagination： 2020, 40(6):37-43

Abstract：

Gas separation membranes typically have multi-layer structures with a gutter layer. The gutter layer shall have high gas permeability and good coating property. Polydimethylsiloxane(PDMS) is an ideal gutter layer material. Its low surface energy is good for coating on to other materials. However, other materials are difficult to be coated on PDMS. In this study, we used commercially available PDMS and CRA additives. We studied the functionality of CRA on the increments of adhesive property of PDMS. When the composition of PDMS to CRA was 1:3 (w:w), a three layer hollow fiber composite membrane Pebax/PDMS/PAN was successfully prepared. The CO2 permeance and CO2/N2 selectivity of the composite membrane were 115.6 GPU, and 29.3, respectively. This result demonstrated that the Pebax layer was successfully coated onto the PDMS surface.

Funds：

国家自然科学基金（51773011）

AuthorIntro：

张旭（1995-），男，山东菏泽人，硕士，从事气体分离膜研究。E-mail：zx18765039316@163.com

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