Preparation,with graphene,of novel biomimetic selfhealing microcapsules with high thermal stability and conductivity  

作　　者：Ying-Yuan WANG Yi-Qiu TAN 

机构地区：[1]School of Transportation Science and Engineering,Harbin Institute of Technology,Harbin 150090,China [2]State Key Laboratory of Urban Water Resource and Environment,Harbin Institute of Technology,Harbin 150090,China

出　　处：《Frontiers of Structural and Civil Engineering》2023年第8期1188-1198,共11页结构与土木工程前沿（英文版）

基　　金：the National Key R&D Program of China(No.2016YFE0202400);the National Natural Science Foundation of China(Grant Nos.U20A20315,51922035,and U1633201)。

摘　　要：This paper reports a comparative study of microcapsules with enhanced thermal stability and electrical conductivity inspired by the bionic thermal insulation of birds’feathers for self-healing aged asphalt.The work is based on an in situ polymerization with composite shell components of graphene and hexamethoxymethylmelamine resin.By using graphene,microcapsules with rough surfaces are achieved,improving the interface between microcapsules and asphalt.In addition,the microcapsules’initial thermal decomposition temperature is appropriately high,so that the stability of the microcapsule in the asphalt highway system is protected.The proportion of graphene in the microcapsule shell can regulate the microcapsule’s heat resistance because graphene modifies the shell’s structural makeup.Additionally,the microcapsules’electrical conductivity is relatively high.The self-healing capability of bitumen sharply increases,providing benefit to the effect of microcapsules on the properties of aged asphalt.

关 键 词：GRAPHENE MICROCAPSULE BITUMEN heat insulation CONDUCTIVITY 

分 类 号：TQ127.11[化学工程—无机化工]