基于聚酰肼的高强度环氧胶粘剂制备及其性能

兰州理工大学学报 ›› 2025, Vol. 51 ›› Issue (6): 29-34.

基于聚酰肼的高强度环氧胶粘剂制备及其性能

张航¹, 代小雨¹, 李燕珍¹, 张定军^*1,2, 曾佳¹, 何自荣³

1.兰州理工大学材料科学与工程学院, 甘肃兰州 730050;
2.兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室, 甘肃兰州 730050;
3.兰州理工大学法学院, 甘肃兰州 730050

收稿日期:2024-09-13 发布日期:2025-12-31
通讯作者: 张定军(1972-),男,甘肃天水人,博士,教授.Email:zhangdingjun@163.com
基金资助:
国家自然科学基金(52363010)

Preparation and properties of polyhydrazide-based high-strength epoxy adhesives

ZHANG Hang¹, DAI Xiao-yu¹, LI Yan-zhen¹, ZHANG Ding-jun^1,2, ZENG Jia¹, HE Zi-rong³

1. School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China;
2. State key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China;
3. Faculty of Law, Lanzhou University of Technology, Lanzhou 730050, China

Received:2024-09-13 Published:2025-12-31

摘要/Abstract

摘要： 以水合肼和对苯二甲酸二甲酯为原料,在80℃条件下反应预先制备了聚酰肼,之后以环氧树脂E-51为基料,羟乙基乙二胺为固化剂制备了一种新型环氧树脂胶粘剂,探讨了聚酰肼含量对环氧树脂胶粘剂性能的影响,并通过测定其粘接强度、硬度、润湿性和吸水性等评价了胶粘剂的物理性能,根据特殊使用场景,研究了该胶粘剂在酸的水溶液中从基材脱落情况.结果表明:随着聚酰肼含量的增加,该增强型环氧树脂胶粘剂的粘接强度先升高后降低,硬度逐渐升高并趋于平缓,当聚酰肼含量为7%时所制备的胶粘剂综合性能最优,硬度为100 HD,粘接强度为9.13 MPa,拉伸强度为82.24 MPa,在温度80 ℃和浓度35%乙酸水溶液中水煮脱胶清除时间为10.4 h.

关键词: 环氧胶粘剂, 聚酰肼, 高强度, 高硬度

Abstract: A polyhydrazide precursor was pre-synthesized via the reaction of hydrazine hydrate and dimethyl terephthalate at 80 ℃. Subsequently, a novel epoxy adhesive was fabricated using epoxy resin E-51 as the matrix and hydroxyethyl ethylenediamine as the curing agent. The influence of polyhydrazide content on the adhesive performance was systematically investigated, and physical properties of the reinforced adhesive, including bonding strength, hardness (Shore D), wettability, and water absorption, were comprehensively evaluated. The debonding behavior of the adhesive in acidic aqueous solutions (35% acetic acid) under simulated service conditions (80 ℃) was characterized to assess environmental resistance.Experimental results demonstrated that the bonding strength of the polyhydrazide-modified epoxy adhesive initially is increased and then decreased with rising polyhydrazide content, while the hardness exhibit a gradual enhancement followed by stabilization. Optimal comprehensive performance is achieved at 7 wt.% polyhydrazide loading, yielding a hardness of 100 HD, bonding strength of 9.13 MPa, and tensile strength of 82.24 MPa. Notably, the adhesive display prolonged debonding resistance in aggressive environments, with a boiling debonding time of 10.4 h in 35% acetic acid at 80 ℃.

Key words: epoxy adhesive, polyhydrazide, high strength, high hardness

中图分类号:

TQ433

张航, 代小雨, 李燕珍, 张定军, 曾佳, 何自荣. 基于聚酰肼的高强度环氧胶粘剂制备及其性能[J]. 兰州理工大学学报, 2025, 51(6): 29-34.

ZHANG Hang, DAI Xiao-yu, LI Yan-zhen, ZHANG Ding-jun, ZENG Jia, HE Zi-rong. Preparation and properties of polyhydrazide-based high-strength epoxy adhesives[J]. Journal of Lanzhou University of Technology, 2025, 51(6): 29-34.

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