【作者】 熊溪； 阮慧榕； 郭帅； 郑雪琳；

【Author】 Xi Xiong;Huirong Ruan;Shuai Guo;Xuelin Zheng;College of Materials Science and Engineering,Fujian Normal University;

【机构】 福建师范大学材料科学与工程学院；

【摘要】 石墨烯气凝胶（GA）是一种三维多孔网络结构的纳米块状材料,具有密度小、比表面积大、结构可控等优异的性能,在吸附、储能、催化等方面展现广阔的应用前^[1]。但GA机械强度不高,在外力作用下易发生坍塌,限制了其应用。漆酚是漆树分泌物生漆的主要成分,是带有15-17个碳原子的不同饱和度的长侧链邻苯二酚的混合物,具有温和的还原能力、修饰作用以及受热发生自交联聚合的独特性能^[2]。本文以氧化石墨烯和漆酚为原料,利用一步溶剂热法,冷冻干燥制备石墨烯/聚漆酚复合气凝胶（PU-GA）。SEM（Fig.1）表明PU-GA为较松散、无序的海绵状交联网络结构,内部的孔洞尺寸约80-150μm,略大于GA。在溶剂热过程中,修饰在石墨烯表面的漆酚发生聚合成为连接石墨烯片层间的高分子骨架,使得PU-GA比GA具有更优异的机械性能:当m_漆酚:mGO=1:1时,PU-GA应变最大值可达50%,最大应力和杨氏模量分别是纯GA的11.2倍和6倍（Fig.2）。吸附试验表明,与GA相比,PU-GA对油和有机溶剂均表现出更好的吸附性能及循环使用性能（Fig.3）。更多还原

【Abstract】 Graphene aerogels(GA),3D porous materials,due to their low density,high surface area,controllable structure,show the potential used in adsorption,energy storage,catalysis,etc.However,pure GA is generally weak which limits their commercial application.Urushiol,the major component of lacquer,is a mixture of three substituted catechol derivatives with unsaturation of 15-17 carbon atoms long side chain and have unique chemical activity,such as reduction,modification,and thermal crosslinking.In this study,the poly(urushiol)/graphene aerogels(PU-GA) were fabricated by one-step solvothermal method with subsequent freeze drying.Compared with GA,the sponge-like crosslinked network of PU-GA is looser and disorder,and the sizes of the pore is 80-150 μm which is shghtly larger than that of GA(Fig.1).Due to the thermal polymerization of urushiol modified on the surface of graphene during the process of solvent thermal,the mechanical integrity of the aerogels has been enhanced(Fig.2).The absorption experiment shows that the adsorption performance for oils and organic solvents of PU-GA is better man that of GA(Fig.3).更多还原