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

延晨政哲 陈利贞 高传慧 武玉民

Chenzhengzhe Yan Lizhen Chen Chuanhui Gao Yumin Wu

青岛科技大学 化工学院，山东 青岛 266011 山东蓝帆化工有限公司，山东 淄博 255400

College of Chemical Engineering，Qingdao University of Science and Technology，Qingdao Shandong 266011，China Shandong Blue Sail Chemical Co. ，Ltd. ，Zibo Shandong 255400，China

报道了一种将α,ω?氨丙基封端的聚（二甲基硅氧烷）（PDMS?NH2）、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?linking α,ω?aminopropyl terminated polydimethylsiloxane (PDMS?NH2),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%.

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)

10.3969/j.issn.1006-396X.2021.05.002