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具有优良机械性能和可拆卸结构粘合剂的高T的环氧玻璃材料

Aiqing Dong¹, Qiguang Liu¹, Huarui Yao¹

¹Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China.

ACS applied materials & interfaces

|February 22, 2025

概括

这项研究开发了一种具有增强热力学和机械性能的新型环氧玻璃制剂. 该材料表现出快速的网络重新配置,自我修复和可回收性,使其适用于先进的复合材料应用.

科学领域:

聚合物化学聚合物化学
材料科学材料科学材料科学
有机化学有机化学

背景情况:

耐热树脂在平衡热力学性能与网络重新配置方面面临着挑战.
维特里默网络拓设计提供了一种克服这些局限性的策略.
同时实现高性能和快速网络重组仍然是一个关键的挑战.

研究的目的:

设计和合成一种具有卓越机械和热力学性能的新型环氧玻璃材料 (DGEBA-API-MHHPA).
调查刚性-柔性集成侧链和Zn2+在促进网络重新配置和提高材料性能方面的作用.
探索开发的玻璃制剂的自我愈合,可回收和粘合性质,用于实际应用.

主要方法:

合成DGEBA-API-MHHPA环氧玻璃化剂,其中包含1-(3-氨基) 胺醇 (API) 侧链.
引入Zn2+以促进转化并实现快速网络重组.
机械性能 (抗拉强度,扬模量,断裂性),热性能 (玻璃过渡温度,Tg) 和放松时间的表征.

主要成果:

该DGEBA-API-MHHPA玻璃仪表出色的机械性能:80.3 MPa的抗拉强度,3.25 GPa的模和7.2 MPa·m1/2的断裂性.
达到129°C的高玻璃过渡温度 (Tg) 和在200°C下65秒的快速放松时间.
该材料表现出自我愈合和可回收的行为,归因于Zn2+-imidazole协调键和多个分子间相互作用.

结论:

开发的环氧玻璃制剂克服了网络稳定性和可重新配置性之间的权衡.
结合API侧链和Zn2+显著提高了热力学性能,并使得快速的网络重新安排.
这一战略为制造高性能,可回收的环氧树脂和复合材料提供了一条道路,用于结构粘合剂和先进材料应用.

关键词:

可拆卸的结构粘合剂环氧玻璃玻璃化剂环氧玻璃化剂优秀的机械性能优秀的机械性能内部的抗塑化方法多个相互作用的多重相互作用.

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