Facile regulation of glutaraldehyde-modified graphene oxide for preparing free-standing papers and nanocomposite films |
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Authors: | Ye-qiang Tan Yi-hu Song Qiang Zheng |
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Institution: | MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering,Zhejiang University, Hangzhou 310027, China |
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Abstract: | Colloidal suspensions of glutaraldehyde (GA) crosslinked or grafted graphene oxide (GO) sheets were fabricated by simply tailoring the feed sequence. The different structures were confirmed by Fourier transform infrared spectra and X-ray diffraction. As demonstration of the utilities, the different colloidal suspensions were used to prepare free-standing papers by flow-directed filtration and poly(vinyl alcohol) (PVA)-based nanocomposite films by casting. Free-standing papers from GA crosslinked GO sheets exhibited better mechanical properties than unmodified GO paper, while nanocomposite films from GA grafted GO exhibit higher tensile strength and Young’s modulus. |
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Keywords: | Graphene oxide paper Glutaraldehyde Mechanical properties Nanocomposites Crystallization behavior |
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