为可持续制造提供分层结构的玻璃生物复合材料
Sargun Singh Rohewal1,2, Joshua T Damron2, Jiho Seo2
1Bredesen Center for Interdisciplinary Research and Graduate Education, University of Tennessee, Knoxville, TN, 37996, USA.
Small (Weinheim an der Bergstrasse, Germany)
|June 18, 2025
概括
这项研究引入了新的玻璃复合材料,用于可持续制造,具有增强的纤维矩阵粘合. 这些材料具有出色的机械性能和可回收性,克服了动态共价聚合物采用的关键限制.
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
- 复合材料 复合材料 复合材料
背景情况:
- 具有动态共价键 (DCB) 的聚合物具有可调性特性,将热塑性可加工性与热性性能相结合.
- 在确定拓结温度 (Tv) 和确保强大的纤维-矩阵粘附方面的挑战阻碍了DCB聚合物的广泛采用.
- 玻璃聚合物是DCB聚合物的一类,由于其可回收性,具有可持续制造潜力.
研究的目的:
- 开发和表征新的以环氧无水化物为基础的聚玻璃复合材料,用纤维素纤维增强.
- 研究动态界面粘合在增强复合材料性能和实现热性方面的作用.
- 阐明控制玻璃体转换的基本机制及其与化学键交换的关系.
主要方法:
- 使用纤维素纤维丝制造层次结构的玻璃复合材料.
- 机械性能的评估,包括剪切强度和延展到故障.
- 利用核磁共振 (NMR) 和纳米红外 (nano-IR) 光谱仪来研究化学键的动态.
- 通过真空辅助树脂转移成型 (VARTM) 评估可加工性.
- 测试多次热修复循环后机械性能保留的测试.
主要成果:
- 证明了异常的机械性能,具有≈70 MPa的剪切强度和>10%的延展到故障.
- 通过纤维素纤维基基组在矩阵转化中的直接参与,建立了动态界面结合.
- 提供了光谱证据,证明化学债券交换开始时低于传统测量的TV.
- 使用VARTM和高可回收性展示了出色的可加工性,在多个循环后保留了>90%的机械性能.
- 支持了这样一个假设,即学决定的Tv受化学交换和摩擦动态的影响.
结论:
- 开发了高性能,可持续的玻璃复合材料,增强了接口粘附和可回收性.
- 进步了对玻璃体过渡的基本理解,揭示了比以前假设的更复杂的过渡机制.
- 强调了这些材料在可持续制造工艺和先进复合材料应用中的潜力.
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