Issue 78, 2017
From the journal:

RSC Advances

Fabrication of free-standing membranes with tunable pore structures based on the combination of electrospinning and self-assembly of block copolymers†

Meimei Zhou, ORCID logo *a   Yi-nan Wu,b   Pingping Luo,a   Jiqiang Lyu,a   Dengrui Mu,a   Aowen Li,a   Fengting Lib  and  Guangtao Li ORCID logo *c  

* Corresponding authors

a Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, School of Environmental Science and Engineering, Chang'an University, 710054 Xi'an, China
E-mail: mmzhou@chd.edu.cn

b College of Environmental Science & Engineering, Tongji University, 1239, Siping Road, Shanghai, China
E-mail: Fengting@tongji.edu.cn

c Department of Chemistry, Key Lab of Organic Optoelectronics & Molecular Engineering, Tsinghua University, Beijing 100084, China

Abstract

In this study, free-standing composite membranes with tunable pore structures are fabricated by combining electrospinning and block copolymer (BCP) self-assembly and a facile biomimetic surface modification method is employed for improvement of the interfacial interaction in the composite membranes. Firstly, polystyrene-block-poly(2-vinyl pyridine) (PS-b-P2VP) solution is drop-coated onto a electrospun PVA/SiO2 fiber mat which provides mechanical reinforcement, fabricating symmetric (thickness, 17 ± 2 μm) and asymmetric (thickness, ∼5 μm) composite membranes. The pore structures in the PS-b-P2VP matrix are realized by selectively swelling the P2VP block in hot ethanol and can be tuned by adjusting swelling time and swelling temperature. Moreover, pretreating the electrospun PVA/SiO2 fibres with adhesive polydopamine (PDA) coating improves the adherence between the BCP layer and the electrospun fibres remarkably. The results of ultrafiltration performance test show the excellent performance of the composite membrane for the immobilization and capture nanoparticles (NPs).

Graphical abstract: Fabrication of free-standing membranes with tunable pore structures based on the combination of electrospinning and self-assembly of block copolymers

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Article information

DOI
https://doi.org/10.1039/C7RA10585A
Article type
Paper
Submitted
25 Sep 2017
Accepted
19 Oct 2017
First published
25 Oct 2017
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2017,7, 49568-49575

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Fabrication of free-standing membranes with tunable pore structures based on the combination of electrospinning and self-assembly of block copolymers

M. Zhou, Y. Wu, P. Luo, J. Lyu, D. Mu, A. Li, F. Li and G. Li, RSC Adv., 2017, 7, 49568 DOI: 10.1039/C7RA10585A

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