High-performance poly(vinyl alcohol)–chitosan sponge modified with graphene oxide
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Three-dimensional porous sponge with good mechanical strength, high absorption capacity and recyclability is of scientific and technological interest. In this work, graphene oxide has been incorporated into poly(vinyl alcohol)–chitosan sponge during acetalization reaction of poly(vinyl alcohol) for the fabrication of macroporous and amphiphilic sponges. Mercury intrusion porosimetry and scanning electron microscopy indicate that the as-prepared sponges have interconnected open-cell structures. The incorporation of graphene oxide and the interconnected macroporous structures in the amphiphilic sponges endow them with improved absorption capacity for both water and organic liquids. Moreover, the absorbed liquids can be effectively collected through simple squeezing and the sponges can be used repeatedly while maintaining a relative high absorption capacity. The simple fabrication and improved performance of the resulting sponges suggest that they have potential industrial applications.
KeywordsPoly(vinyl alcohol) Chitosan Graphene oxide Sponge
The work was supported by Outstanding Youth Scientific Innovation Team of Colleges and Universities in Hubei Province (T201406) and National Natural Science Foundation of China (51403167, 51602230).