热可逆聚氨酯改性自修复环氧树脂的力学性能和自修复行为

doi:10.11896/cldb.22010044

材料导报

2023, Vol. 37

Issue (14): 22010044-6 https://doi.org/10.11896/cldb.22010044

高分子与聚合物基复合材料

热可逆聚氨酯改性自修复环氧树脂的力学性能和自修复行为

叶姣凤¹, 王飞¹, 张钧翔¹, 左洋¹, 冯利邦^1,*, 罗晓晓²

1 兰州交通大学材料科学与工程学院,兰州 730070
2 华南理工大学亚热带建筑科学国家重点实验室,广州 510641

Mechanical Properties and Self-healing Behavior of Thermo-reversible Polyurethane-modified Self-healing Epoxy Resins

YE Jiaofeng¹, WANG Fei¹, ZHANG Junxiang¹, ZUO Yang¹, FENG Libang^1,*, LUO Xiaoxiao²

1 School of Materials Science and Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
2 State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510641, China

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摘要通过将热可逆聚氨酯引入基于Diels-Alder反应的自修复环氧树脂,成功制得热可逆聚氨酯改性自修复环氧树脂材料。热可逆聚氨酯的引入赋予自修复环氧树脂良好的抗弯性能、冲击韧性和自修复能力。当聚氨酯的添加量为20%时,得到的材料性能最佳。当改性材料在外界因素作用下出现裂纹、裂缝等损伤后,通过在130 ℃处理12 min及85 ℃处理24 h便可实现损伤的修复,并且可实现多次损伤的重复自修复。研究发现,多次重复自修复是通过热可逆Diels-Alder反应、分子链的热运动,以及氢键的解离和再生这三种作用协同实现。这些研究结果对制备具有良好冲击韧性的环氧树脂材料及其损伤的高效自修复具有重要的指导意义。

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	叶姣凤
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	罗晓晓

关键词: 聚氨酯环氧树脂韧性热可逆自修复

Abstract: A thermo-reversible polyurethane-modified self-healing epoxy resin was manufactured successfully through introducing thermo-reversible polyurethane into Diels-Alder reaction-based self-healing epoxy resin. The bending behavior, impact toughness and self-healing performance of self-healing epoxy resin were reinforced prominently when thermo-reversible polyurethane was introduced. The thermo-reversible polyurethane-modified self-healing epoxy resin material exhibited the optimal performance when the introduced amount of thermo-reversible polyurethane was 20%. Cracks could be renovated by heat-treating at 130 ℃ for 12 min and 85 ℃ for 24 h once thermo-reversible polyurethane-modified self-hea-ling epoxy resin was damaged on account of external factors and cracks appeared. Moreover, the repair could be repeated. Results revealed that the repeated self-healing behavior was implemented by reason of synergistic effect of thermo-reversible Diels-Alder reaction, dissociation and regeneration of hydrogen bonds as well as thermal movement of molecular chains. The results had significant instruction for fabricating epoxy resin materials with both strong impact toughness and self-healing for micro-damages efficiently.

Key words: polyurethane epoxy resin toughness thermo-reversible self-healing

出版日期: 2023-07-25 发布日期: 2023-07-24

ZTFLH:

TQ323

基金资助: 国家自然科学基金(51463010);西部之光支持项目

通讯作者: *冯利邦,兰州交通大学材料科学与工程学院教授、博士研究生导师。1996年兰州大学应用化学专业本科毕业,2004年兰州大学高分子化学与物理专业硕士毕业,2007年复旦大学材料物理与化学专业博士毕业。目前主要从事高分子和功能界面材料的研究工作。发表高水平学术论文60余篇。fenglb@lzjtu.edu.cn

作者简介: 叶姣凤,2010年6月、2013年6月分别于兰州交通大学获得工学学士学位和硕士学位。现为兰州交通大学材料科学与工程学院博士研究生,在冯利邦教授的指导下进行研究。目前主要研究领域为高分子材料。

引用本文:

叶姣凤, 王飞, 张钧翔, 左洋, 冯利邦, 罗晓晓. 热可逆聚氨酯改性自修复环氧树脂的力学性能和自修复行为[J]. 材料导报, 2023, 37(14): 22010044-6.
YE Jiaofeng, WANG Fei, ZHANG Junxiang, ZUO Yang, FENG Libang, LUO Xiaoxiao. Mechanical Properties and Self-healing Behavior of Thermo-reversible Polyurethane-modified Self-healing Epoxy Resins. Materials Reports, 2023, 37(14): 22010044-6.

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http://www.mater-rep.com/CN/10.11896/cldb.22010044 或 http://www.mater-rep.com/CN/Y2023/V37/I14/22010044

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