High‐performance, semi‐bio‐based degradable epoxy resins and its application to recyclable carbon fiber composites

IF 2.9 4区化学 Q2 POLYMER SCIENCE Polymer International Pub Date : 2024-04-27 DOI:10.1002/pi.6646

Shuanghong Yu, Kaixuan Xiao, Zhaodi Wang, Yahong Xu, Nannan Ni, Dongyuan Hu, Zhiyi Lyu, Soochan Kim, Xin Yang

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Abstract

Epoxy resins containing dynamic covalent networks enable recycling of carbon fiber composites. However, simultaneous realization of high performance and mild condition recycling of composites is still a challenge. In the present work, we mixed citric acid epoxy resin with bisphenol A epoxy resin to form a hybrid resin (DER) that meets the requirements of medium temperature curing epoxy resin, and prepared a carbon fiber reinforced resin composite material (DER@CF) that can rapidly degrade and recycle carbon fibers under mild conditions. The Tg of the DER was 125.67 °C, and the tensile strength (79.63 MPa) was comparable to that of the bisphenol A epoxy resin (79.90 MPa). It degraded rapidly after 2 h in ethylene glycol (EG) solution at 120 °C. The tensile strength of DER@CF was 825 MPa, and clean fibers could be obtained after 8 h of treatment in EG solution at 120 °C. The results of SEM, Raman, and tensile tests showed that the recycled fibers were similar to the original fibers in terms of morphology, chemical structure, and mechanical properties.This article is protected by copyright. All rights reserved.

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高性能半生物基可降解环氧树脂及其在可回收碳纤维复合材料中的应用

含有动态共价网络的环氧树脂可实现碳纤维复合材料的循环利用。然而，同时实现高性能和温和条件下的复合材料回收利用仍是一项挑战。在本研究中，我们将柠檬酸环氧树脂与双酚 A 环氧树脂混合，形成了一种符合中温固化环氧树脂要求的混合树脂（DER），并制备了一种可在温和条件下快速降解和回收碳纤维的碳纤维增强树脂复合材料（DER@CF）。DER 的 Tg 为 125.67 ℃，拉伸强度（79.63 MPa）与双酚 A 环氧树脂（79.90 MPa）相当。在 120 °C的乙二醇（EG）溶液中浸泡 2 小时后，它迅速降解。DER@CF 的拉伸强度为 825 兆帕，在 120 ℃ 的乙二醇溶液中处理 8 小时后可获得洁净的纤维。扫描电镜、拉曼和拉伸测试结果表明，再生纤维在形态、化学结构和机械性能方面与原始纤维相似。本文受版权保护。

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来源期刊

Polymer International 化学-高分子科学

CiteScore

7.10

自引率

3.10%

发文量

135

审稿时长

4.3 months

期刊介绍： Polymer International (PI) publishes the most significant advances in macromolecular science and technology. PI especially welcomes research papers that address applications that fall within the broad headings Energy and Electronics, Biomedical Studies, and Water, Environment and Sustainability. The Journal’s editors have identified these as the major challenges facing polymer scientists worldwide. The Journal also publishes invited Review, Mini-review and Perspective papers that address these challenges and others that may be of growing or future relevance to polymer scientists and engineers.