氧化石墨烯/聚合物复合水凝胶的研究进展

氧化石墨烯是一种具有单原子厚度的二维材料, 具有优异的力学性能和良好的水分散性, 其表面有大量的含氧官能团. 将氧化石墨烯引入水凝胶体系中可以提高水凝胶的机械性能, 丰富其刺激响应的类型. 目前, 氧化石墨烯水凝胶在高强度、 吸附、 自愈合及智能材料等很多领域均有出色的表现. 氧化石墨烯水凝胶的研究已有10年的历史. 本文总结了氧化石墨烯水凝胶的制备方法, 归纳了智能氧化石墨烯水凝胶在光热响应、 pH响应和自愈合3个方面的响应机理和研究进展, 并综合评述了其在高强度水凝胶、 生物医学、 智能材料和污水处理等方面的应用前景.

Progress of Graphene Oxide/Polymer Composite Hydrogel

Graphene oxide（GO） is a popular two-dimensional material with excellent mechanical properties， good water dispersibility， non-toxicity， and good biocompatibility， and its surface has a large number of oxygen-containing functional groups. Therefore， GO is an ideal hydrogel raw material. Hydrogel is a multi- element system with a three-dimensional network structure and water as the filling medium. The introduction of GO into the hydrogel system can improve the mechanical properties of the hydrogel and enrich its stimulus response types. At present， GO hydrogel has excellent performance in many fields such as high strength， adsorption， self-healing materials and sensors， and has become one of the research hotspots. The research of GO hydrogel has a history of ten years. In this review， the preparation methods of GO hydrogels are summarized， including acidification and the addition of polymers， small organic molecules or ions as crosslinking agents. Among them， GO/polymer composite hydrogels prepared by physical mixing and chemical crosslinking and polymerization methods are the most common. The response mechanism and research progress of smart GO hydrogels are summarized in terms of photo-thermal response， pH response and self-healing. The application prospects of GO hydrogels in high strength hydrogels， biomedicine science， smart materials and sewage treatment are reviewed.