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Cross-linked perforated honeycomb membranes with improved mechanical and chemical properties

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Abstract

Ultrathin perforated honeycomb-patterned membranes show promise for high-resolution separation, in which the mechanical strength and chemical stability of membranes are very important. Here we report facile and versatile modification methods for preparing cross-linked honeycomb membranes with tunable mechanical and chemical properties. Commercially available polystyrene-b-polyisoprene-b-polystyrene (SIS), which contains double bonds for post modification, together with an amphiphilic block copolymer was utilized as the membrane-forming material. Robust and self-standing honeycomb membranes were obtained by the rapid vapor diffusion cross-linking of S2Cl2 in 5 min. X-ray photoelectron spectroscopy (XPS) and energy dispersive X-ray spectroscopy (EDX) results demonstrate effective cross-linking. The cross-linked membranes show excellent resistance to organic solvents and other harsh environments. Water flux measurements indicate that the cross-linked membranes can endure trans-membrane pressure as high as 0.12 MPa. The cross-linked membranes are stable in a wide temperature range. Another cross-linking method based on thiol–ene click chemistry is also proved to be able to form robust membranes with both improved stabilities and controllable surface properties. Moreover, the cross-linked perforated honeycomb membranes can be used for separation under higher operation pressure.

Graphical abstract: Cross-linked perforated honeycomb membranes with improved mechanical and chemical properties

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Publication details

The article was received on 16 Nov 2016, accepted on 07 Dec 2016, published on 07 Dec 2016 and first published online on 07 Dec 2016


Article type: Research Article
DOI: 10.1039/C6QM00317F
Citation: Mater. Chem. Front., 2017, Advance Article
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    Cross-linked perforated honeycomb membranes with improved mechanical and chemical properties

    Q. Zhong, L. Zhang, Y. Ou, B. Wu, L. Wan and Z. Xu, Mater. Chem. Front., 2017, Advance Article , DOI: 10.1039/C6QM00317F

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