由间苯二酚环氧单体和酸酐制备的生物基环氧树脂

IF 7.9 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability Pub Date : 2025-08-23 DOI:10.1016/j.mtsust.2025.101212

Angela Marotta , Cosimo Brondi , Mattia Sivero , Pierfrancesco Cerruti , Veronica Ambrogi , Alice Mija

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引用次数: 0

摘要

高玻璃化转变（Tg）生物基环氧热固性材料的设计和开发是许多应用领域的关键挑战。为此，在本研究中，间苯二酚二缩水甘油醚（DGER）被提出作为一种潜在的生物基替代双酚a二缩水甘油醚（DGEBA）用于合成高性能环氧树脂。DGER是由间苯二酚二缩水甘油化得到的，间苯二酚是一种由葡萄糖或儿茶素发酵合成的芳香二醇。研究了多种酸酐作为硬化剂和几种咪唑引发剂存在下DGER的固化过程。通过化学流变学分析进一步研究了最有效的硬化剂/引发剂组合，从而得到反应转化率最高、玻璃化转变最高（Tg > 100℃）的树脂，并提出了交联反应的动力学模型。通过监测在不同固化温度下收集的ATR-FTIR光谱中酸酐和环氧环特征峰的消失，以及环氧/酸酐树脂中典型形成的酯基特征带的出现来评价转化程度。通过拟合转化数据，确定了自催化交联机理，并计算了动力学参数。此外，还对dger基环氧树脂的热机械特性和化学稳定性进行了评估，确定了这种环氧热固性树脂在高机械和热性能要求下的潜在用途。

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Biobased epoxy resins obtained from resorcinol epoxy monomer and anhydrides

Design and development of high glass transition (T_g) biobased epoxy thermosets is a key challenge for several fields of applications. To this aim, in the present study diglycidyl ether of resorcinol (DGER) is proposed as a potentially biobased alternative to diglycidyl ether of bisphenol A (DGEBA) for the synthesis of high-performance epoxy resins. DGER is obtained by diglycidylation of resorcinol, an aromatic diol synthesized by fermentation of glucose or catechin. The curing process of DGER in the presence of various anhydrides as hardeners and several imidazole initiators is studied. The most efficient hardener/initiatior combination, which leads to the resin with the highest degree of reaction conversion and the highest glass transition (T_g > 100 °C) is further studied by chemorheological analysis, and a kinetic model for the crosslinking reaction is proposed. The conversion degree is evaluated by monitoring the disappearing of characteristic peaks of anhydride and epoxy rings in ATR-FTIR spectra collected at different curing temperature, as well as the appearance of the characteristic band of ester groups typically formed in epoxy/anhydride resins. By fitting the conversion data, the autocatalytic crosslinking mechanism is confirmed, and kinetic parameters are calculated. Also, the thermomechanical characteristics and chemical stability of DGER-based epoxy resins are evaluated, confirming the potential use of this epoxy thermosets when high mechanical and thermal properties are required.

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来源期刊

Materials Today Sustainability Multiple-

CiteScore

5.80

自引率

6.40%

发文量

174

审稿时长

32 days

期刊介绍： Materials Today Sustainability is a multi-disciplinary journal covering all aspects of sustainability through materials science. With a rapidly increasing population with growing demands, materials science has emerged as a critical discipline toward protecting of the environment and ensuring the long term survival of future generations.