基于动态亚胺键的自修复有机硅弹性体的制备及性能研究  

Preparation and Characterization of Self-Healing Silicone Elastomers Based on Dynamic Imine Bonds

作　　者：延晨政哲 陈利贞 高传慧[1] 武玉民[1] Yan Chenzhengzhe;Chen Lizhen;Gao Chuanhui;Wu Yumin(College of Chemical Engineering,Qingdao University of Science and Technology,Qingdao Shandong 266011,China;Shandong Blue Sail Chemical Co.,Ltd.,Zibo Shandong 255400,China)

机构地区：[1]青岛科技大学化工学院,山东青岛266011 [2]山东蓝帆化工有限公司,山东淄博255400

出　　处：《石油化工高等学校学报》2021年第5期9-15,共7页Journal of Petrochemical Universities

基　　金：国家自然科学基金项目(51872150);山东省自然科学基金项目(ZR2019QB019);山东省生态化工协同创新中心人才基金(XTCXQN11);山东省高校“青创科技计划”项目(2020KJC005);化工学院生态化工国家重点实验室基地开放课题基金(STHG1804)。

摘　　要：报道了一种将α,ω-氨丙基封端的聚(二甲基硅氧烷)(PDMS-NH_(2))、戊二醛(GA)和三(4-氨基苯基)胺(TAPA)通过席夫碱反应进行交联,合成自修复有机硅弹性体PDMS-GA-TAPA。通过FT-IR和1H-NMR对PDMS-GA-TAPA的结构进行表征。高温溶解实验证明PDMS-GA-TAPA具有优异的化学稳定性和热稳定性。同时,PDMS-GA-TAPA具有优异的机械强度,其拉伸强度最高可达3.6 MPa,断裂伸长率最高可达112%。此外,通过调节PDMS-GA-TAPA的交联密度,可以实现调节PDMS-GA-TAPA机械性能的目的。将PDMS-GA-TAPA样品在100℃处理1 h,该弹性体可以实现自修复,其自修复效率达到83%。A type of silicone elastomer PDMS-GA-TAPA was prepared based on the Schiff-Base reaction by cross-linkingα,ω-aminopropyl terminated polydimethylsiloxane(PDMS-NH_(2)),glutaraldehyde(GA)and tris(4-aminophenyl)amine(TAPA).The structure of PDMS-GA-TAPA was characterized by FT-IR,1H-NMR and PDMS-GA-TAPA,which showed excellent chemical and thermal stability proved by high temperature dissolution experiments.The PDMS-GA-TAPA has excellent mechanical strength,with tensile strength up to 3.6 MPa and elongation at break up to 112%.In addition,the mechanical properties of PDMS GA-TAPA can be regulated and optimized by adjusting the crosslinking density of PDMS-GA-TAPA.When the PDMS-GA-TAPA was treated on a heating table at 100℃for 1 h,the elastomer could realize self-healing with efficiency up to 83%.

关 键 词：自修复 亚胺键 PDMS交联网络 有机硅弹性体 高稳定性 

分 类 号：TQ333.93[化学工程—橡胶工业]