石墨烯/聚合物纳米复合电流变材料

电流变智能流体在外电场刺激下能快速可逆地改变自身流变性能,具有重要技术应用价值.传统的基于微米颗粒的电流变流体易于沉降并且电致屈服强度不高限制了技术应用,最近基于纳米颗粒的非传统电流变材料研究受到重视,特别是具有各向异性形貌的纳米颗粒悬浮液被发现具有明显增强的电/磁流变效应.本文介绍了最近基于石墨烯的二维纳米复合电流变材料的研究进展,主要包括石墨烯/半导聚合物、石墨烯/极性聚合物、石墨烯/碳等几种典型的电流变材料的制备、结构和电流变行为.研究表明利用石墨烯独特的二维纳米结构、优异的电学和热学性质可能为制备新颖的高性能纳米电流变材料提供途径。

ELECTRORHEOLOGICAL MATERIALS BASED ON GRAPHENE/POLYMER NANOCOMPOSITES

Electrorheological(ER) smart fluids can rapidly and reversibly response to an external electric field by transmitting rheological properties,which have many potential technical applications.However,conventional ER fluids based on microparticles are subjected to challenges in practical applications due to the problems including large particle sedimentation and low electric-field-induced yield strength.Recent researches of using nanoparticles as the dispersal phase have led to new interest in the development of non-conventional ER fluids with improved electrorheology.In this brief review,we especially focus on the recent researches on preparation,structure and electrorheology of two-dimensional graphene-based composites including graphene/semiconduting polymer graphene/polar polymer and graphene/carbonaceous composites.The results have showed that using graphene as host to prepare novel two-dimensional ER materials possibly provide a potential approach to develop high-performance ER fluids due to the advantages of the atomically thick two-dimensional structure,excellently electric and thermal properties.