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Caption : fig. s1. the sem micrographs of nanofibres with different volume ratios of pva/cs: a) pc-1 (9:1); b) pc-2 (8:2); c) pc-3 (7:3) and d) pc-4 (6:4).

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Caption : fig. s2. the ftir spectra of pure cs and pva, and its zeolite-a nanofibrous composite membranes.

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Caption : fig. s3. the tga thermograms of composite nanofibrous membranes: ze-0, ze-1, ze-2, ze-3 and ze-4.

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Caption : fig.s4. the waxd patterns of nanofibrous composite membranes: ze-0, ze-1, ze-2, ze-3 and ze-4.

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Caption : fig. s5. the stress-strain curves of the composite nanofibrous membranes.

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Caption : fig. s6. the degree of swelling for pva/cs and zeolite-a incorporated composite nanofibrous membranes in different mass% of water in the feed.

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Caption : fig. s7. the sorption curves of composite nanofibrous membranes.