SbF_5-loaded microcapsules for ultrafast self-healing of polymer  

作　　者：Xiao-Ji Ye Zhuo-Xi Ma Yi-Xi Song Jia-Jia Huang Min-Zhi Rong Ming-Qiu Zhang 

机构地区：[1]Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education,CD HPPC Lab,School of Chemistry and Chemical Engineering,Sun Yat-sen University

出　　处：《Chinese Chemical Letters》2014年第12期1565-1568,共4页中国化学快报（英文版）

基　　金：the support of the National Natural Science Foundation of China(Nos.51273214 and 51333008);Doctoral Fund of Ministry of Education of China(No.20090171110026);the Science and Technology Program of Guangdong Province(Nos. 2010B010800021,2010A011300004,2011A091102001 and S2013020013029);the Basic Scientific Research Foundation in Colleges and Universities of Ministry of Education of China(No. 121gjc08)

摘　　要：To accelerate self-healing speed of epoxy materials,epoxy-SbF5 cure was introduced into the healing chemistry.Due to the high activity of SbF5,a milder SbF5-ethanol complex with improved processability was prepared,but it was still quite active and cannot be encapsulated by conventional encapsulation techniques like in situ polymerization.Accordingly,a novel route was proposed.Hollow silica microcapsules were firstly synthesized via sol-gel technique,which were then steeped in ethanol solution of SbF5-ethanol complex under vacuum,allowing infiltration of the latter into the capsules.The optimal formulation for creating the hollow silica capsules was studied in detail.Moreover,the results of optical pyrometry demonstrated that the encapsulated chemical retained its high reactivity toward the epoxy.To accelerate self-healing speed of epoxy materials,epoxy-SbF5 cure was introduced into the healing chemistry.Due to the high activity of SbF5,a milder SbF5-ethanol complex with improved processability was prepared,but it was still quite active and cannot be encapsulated by conventional encapsulation techniques like in situ polymerization.Accordingly,a novel route was proposed.Hollow silica microcapsules were firstly synthesized via sol-gel technique,which were then steeped in ethanol solution of SbF5-ethanol complex under vacuum,allowing infiltration of the latter into the capsules.The optimal formulation for creating the hollow silica capsules was studied in detail.Moreover,the results of optical pyrometry demonstrated that the encapsulated chemical retained its high reactivity toward the epoxy.

关 键 词：Sol-gel Microencapsulation Lewis acid Self-healing 

分 类 号：O631.11[理学—高分子化学]