Spirocyclic Bio-Based Epoxy Resins from Lignin-Derived Guaiacol: Molecular Design for Enhanced Thermal, Mechanical, and Hygrothermal Stability

IF 5.2 2区化学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Applied Polymer Materials Pub Date : 2026-10-09 Epub Date: 2026-09-22 DOI:10.1021/acsapm.6c02718

Haoyang Jin, Fengyuan Zhang, Longtao Wang, Tianyun Zhang, Shanshan Dai, Songqi Ma

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引用次数: 0

Abstract

Growing global demand for sustainable materials has driven the development of high-performance biobased epoxy resins. However, conventional strategies are plagued by reliance on fossil resources and subpar performance across key metrics (e.g., glass transition temperature, tensile modulus, and hygrothermal stability), making it difficult to simultaneously balance sustainability and high performance. Herein, an innovative biobased epoxy resin featuring a spirocyclic molecular architecture was synthesized from guaiacol (2-methoxyphenol), a lignin-derived platform monomer. Compared with diglycidyl ether of bisphenol A (DGEBA) thermosets, the cured networks exhibited a significantly higher glass transition temperature (T_g) and enhanced tensile modulus. Furthermore, the networks exhibited exceptional hygrothermal stability, retaining 94.2% of their initial tensile strength and 93.7% of their initial tensile modulus after aging for 15 days under 60 °C and 90% relative humidity. This paper introduces a macromolecular architecture design strategy centered on spirocyclic topology and establishes a deoxygenation-free route to transform lignin-derived monomers into high-performance epoxy thermosets.

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木素衍生愈创木酚的螺旋环生物基环氧树脂：增强热、机械和湿热稳定性的分子设计

全球对可持续材料的需求不断增长，推动了高性能生物基环氧树脂的发展。然而，传统策略受到依赖化石资源和关键指标（例如，玻璃化转变温度、拉伸模量和湿热稳定性）性能不佳的困扰，使得难以同时平衡可持续性和高性能。本文以木素衍生平台单体愈创木酚（2-甲氧基酚）为原料，合成了一种具有螺旋环分子结构的新型生物基环氧树脂。与双酚A二缩水甘油酯（DGEBA）热固性材料相比，固化后的网络具有更高的玻璃化转变温度（Tg）和增强的拉伸模量。此外，网络表现出优异的湿热稳定性，在60°C和90%相对湿度下老化15天后，保持了94.2%的初始拉伸强度和93.7%的初始拉伸模量。本文介绍了一种以螺旋环拓扑为中心的大分子结构设计策略，并建立了一种将木质素衍生单体转化为高性能环氧热固性树脂的无脱氧途径。

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来源期刊

ACS Applied Polymer Materials Multiple-

CiteScore

7.20

自引率

6.00%

发文量

810

期刊介绍： ACS Applied Polymer Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics, and biology relevant to applications of polymers. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrates fundamental knowledge in the areas of materials, engineering, physics, bioscience, polymer science and chemistry into important polymer applications. The journal is specifically interested in work that addresses relationships among structure, processing, morphology, chemistry, properties, and function as well as work that provide insights into mechanisms critical to the performance of the polymer for applications.