高玻璃过渡的环氧树脂来自生物基醇和未经修改的强电
Jan Janesch1,2, Roxana Dinu3, Thomas Rosenau2
1BOKU University, Institute of Wood Technology and Renewable Materials, Department of Natural Sciences and Sustainable Resources, Konrad-Lorenz-Straße 24, 3430 Tulln, Austria.
ACS omega
|November 24, 2025
概括
这项研究开发了高性能,基于生物的环氧树脂,使用黄三糖乙烯 (TGPh) 和卡夫特木质素 (KL). 含素的树脂显示显著增加了玻璃过渡温度,证明了可持续材料应用的潜力.
科学领域:
- 聚合物科学 聚合物科学
- 材料科学 材料科学 材料科学
- 可持续化学 可持续化学
背景情况:
- 环氧树脂广泛使用,但通常来自石油.
- 对于来自可再生资源的高性能耐热材料的需求日益增长.
- 纸业的副产品是丰富的可再生芳香聚合物.
研究的目的:
- 开发高性能环氧树脂,使用生物基甘酸甘乙烯 (TGPh) 和未经改性Kraft素 (KL).
- 研究创建具有高可再生物质含量 (高达~95%) 的热材料的潜力.
- 了解素作为环氧树脂交联中的联合硬化剂的作用.
主要方法:
- 将硬木和软木的卡夫素 (KL) 加入TGPh中,重量为30%. 装载. 装载. 在装载.
- 使用富里埃变换红外光谱 (FTIR),微分扫描热度计 (DSC),热重度计分析 (TGA),动态机械分析 (DMA),拉伸测试和扫描电子显微镜 (SEM) 的表征.
- 通过在各种溶剂中进行凝含量分析来评估交叉链接.
主要成果:
- 所有含有素的环氧树脂都达到97%以上的凝含量,表明完全交叉链接.
- 添加素增加了玻璃过渡温度 (Tg) 从146°C (纯TGPh) 提高到178°C (软木KL) 和187°C (硬木KL).
- 拉力强度下降,但度 (拉力模量) 保持在 2-2.5 GPa; SEM 显示不均.
结论:
- 开发的生物基环氧树脂具有高的玻璃过渡温度和良好的交叉连接,适合苛刻的应用.
- 红作为辅助硬化剂,增强了环氧基质的交叉链密度和热特性.
- 这些发现突显了素作为高性能热材料的可持续成分的潜力,用于电子和汽车等行业.
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