室温自修复聚硅氧烷弹性体的无溶剂制备及性能研究
Solvent-free preparation and properties of room temperature self-healing polysiloxane elastomers
宋士康 1方子豪 1曹明 1夏茹 2陈鹏 1钱家盛1
作者信息
- 1. 安徽大学化学化工学院,绿色高分子材料安徽省重点实验室,安徽 合肥 230601
- 2. 安徽大学化学化工学院,绿色高分子材料安徽省重点实验室,安徽 合肥 230601;高性能橡胶材料及制品安徽省重点实验室,安徽宁国 242300
- 折叠
摘要
以侧链氨丙基聚硅氧烷(PDMS-NH2)为原料、1,3,5-三(4-甲酰基苯基)苯(TPB)为交联剂,使用无溶剂联合热压法制备一种含有动态亚胺键的聚硅氧烷弹性体.通过傅里叶红外光谱、拉曼光谱对聚硅氧烷弹性体进行表征,研究聚硅氧烷弹性体力学性能、重加工性能、自修复性能.结果表明,以刚性多元苯环结构的TPB为交联剂,通过调控交联度,获得了良好力学性能和室温自修复能力的聚硅氧烷弹性体.当氨基和醛基的摩尔比为1:1时,聚硅氧烷弹性体的拉伸强度为68 kPa,断裂伸长率为179％,切断弹性体6 h室温自修复效率为82.36％,剪碎弹性体室温重塑后样品的力学性能保持原始样品的80％以上,80 ℃下提升到98.53％.
Abstract
In this study,polysiloxane elastomers containing dynamic imine bonds were prepared using solvent-free hot-pressing method with polydimethylsiloxane-amine(PDMS-NH2)as the raw material and 1,3,5-tris(4-formylphenyl)benzene(TPB)as the crosslinker.The polysiloxane elastomers were characterized by Fourier transform infrared spectroscopy and Raman spectroscopy.The mechanical properties,reprocessing properties and self-healing properties of the polysiloxane elastomers were investigated,respectively.The results showed that the polysiloxane elastomers with good mechanical properties and room temperature self-healing ability were obtained by modulating the degree of cross-linking and using TPB with a rigid polyphenylene ring structure as the cross-linking agent.When the molar ratio of amino and aldehyde groups was 1:1,the tensile strength of polysiloxane elastomers was 68 kPa,the elongation at break was 179％.The room-temperature self-healing efficiency of cut elastomers for 6 h was 82.36％,the mechanical properties of the sheared elastomers at room-temperature remodeling were maintained at more than 80％of that of the original samples,which were elevated to 98.53％at 80℃.
关键词
无溶剂/自修复/交联/重塑Key words
solvent-free/self-healing/cross-linking/remodeling引用本文复制引用
出版年
2025
国家科技期刊平台
NSTL
万方数据