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探索利用木材加工废弃物的战略:推进可持续的,完全基纤维素生物复合材料
Roxana Dinu1, Iuliana Bejenari2, Irina Volf2
1University Côte d'Azur, Institute of Chemistry of Nice, UMR CNRS 7272, 06108 Nice Cedex, France.
International journal of biological macromolecules
|September 27, 2024
概括
这项研究开发了来自木材生物质的新型生物复合材料,使用杉树皮粉末作为生物基环氧树脂中的填充物. 这些可持续材料在没有额外的硬化剂或填充剂修改的情况下表现出增强的性能.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 生物复合材料工程 生物复合材料工程
背景情况:
- 来自可再生资源的可持续材料的开发对于减少环境影响至关重要.
- 木材生物质是一种易于获得的副产品,具有创造先进复合材料的潜力.
- 目前生物复合材料的局限性往往来自填充剂-矩阵兼容性和加工挑战.
研究的目的:
- 合成和描述使用木材衍生元件的新型生物复合材料,用于矩阵和填充剂.
- 研究树皮粉末 (SB) 作为填充剂对生物基环氧树脂 (Resorcinol diglycidyl ether - RDGE) 的特性的影响.
- 为了评估这些完全基纤维素材料的热性能和机械性能,而不需要额外的化学处理.
主要方法:
- 用不同百分比 (1-30重量%) 的未经处理的杉树皮粉末 (SB) 均聚化树脂醇二甲基乙醇 (RDGE).
- 差分扫描热量计 (DSC) 用于分析反应动力学和热过渡.
- 动态机械分析 (DMA) 用于确定粘弹性特性 (储存模量E',缓冲因子).
- 扫描电子显微镜 (SEM) 检查填充剂-矩阵接口粘附.
主要成果:
- 加入SB增强了RDGE矩阵的反应性,由减少的反应温度范围表明.
- 生物复合材料的储存模量值很高:2.4-3.5 GPa (玻璃状) 和99-156 MPa (状).
- 随着SB含量 (从92°C到94-97°C) 的增加,α过渡温度增加了1-10%SB的重量.
- SEM证实了出色的填充剂-矩阵粘合和接口质量.
结论:
- 使用未经处理的杉树皮粉末和生物基环氧树脂,可以成功合成完全纤维素生物复合材料.
- 添加杉皮粉末显著影响了固化动力学,并增强了生物复合材料的机械性能.
- 这些发现突出了利用木材加工副产品创造高性能,可持续材料的潜力.
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