| 摘要: |
| 基于团队已研发的胶黏剂配比，制备了一种适用于钢桥加固用的高性能结构胶黏剂，研究了纳米SiO2掺量、缩胺105固化剂与聚醚胺D230固化剂的混掺比例及固化时间对胶黏剂室温性能的影响，并探讨了胶黏剂在不同工作温度下的力学性能.结果表明：当纳米SiO2掺量为0.75%，缩胺105固化剂与聚醚胺D230固化剂的质量比为1∶2，固化制度为90 ℃下固化2.5 h时，胶黏剂的室温力学性能最佳，并且在低温（-20 ℃）和高温（70 ℃）下均能保持良好的力学性能. |
| 关键词: 纳米材料 高低温 固化时间 高性能环氧胶黏剂 力学性能 |
| DOI：10.3969/j.issn.1007-9629.2024.06.011 |
| 分类号:TU58+1 |
| 基金项目:国家自然科学基金资助项目（51778069）；湖南省自然科学基金资助项目（2021JJ40173）；湖南省教育厅优秀青年项目（22B0589）；湖南省研究生科研创新重点项目（QL20210180） |
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| Preparation of Epoxy Adhesives with High Performance at High-Low Temperature |
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LI Chuanxi1,2, GAO Youwei1, WANG Xiaoyao1, LI You3, SIDU Yinghu1
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1.School of Civil Engineering， Changsha University of Science and Technology， Changsha 410114， China;2.School of Civil Engineering and Architecture， Guangxi University， Nanning 530005，China;3.College of Civil Engineering， Hunan University of Technology， Zhuzhou 412007， China
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| Abstract: |
| Based on the adhesive formulation developed by the team， a high performance structural adhesive suitable for steel bridge reinforcement was prepared. The influence of nano-SiO2 content， the blending ratio of amine curing agent 105 and polyetheramine D230， as well as the curing time on the ambient temperature performance of the adhesive， was investigated. Additionally， the mechanical properties of the adhesive at different working temperatures were explored. Results indicates that when the nano-SiO2 content is 0.75%， and the mass ratio of amine curing agent 105 to polyetheramine D230 is 3∶4， with a curing regimen of 90 ℃ for 2.5 hours， the adhesive exhibited optimal ambient temperature mechanical performance. Furthermore， it maintains good mechanical properties at both low （-20 ℃） and high （70 ℃） temperatures. |
| Key words: nanomaterial high-low temperature curing time high performance epoxy adhesive mechanical property |
