多尺度设计,使纤维素泡具有坚固性,绝热性和火焰自性
Hao Sun1, Dingyuan Zheng1, Yeling Zhu1
1Sustainable Functional Biomaterials Laboratory, Department of Wood Science, The University of British of Columbia, Vancouver, BC, V6T 1Z4, Canada.
Small (Weinheim an der Bergstrasse, Germany)
|November 8, 2023
概括
本研究介绍了一种具有特殊网络完整性和机械性能的新型纤维素泡,通过先进的多尺度设计实现. 由此产生的环保泡为可持续材料应用提供了高性能,耐用性和生物降解性.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
- 纳米技术 纳米技术
背景情况:
- 纤维素泡是环保的,但与机械完整性作斗争.
- 将纤维素纤维的特性转移到泡网络是一个挑战.
研究的目的:
- 开发用于纤维素泡的多尺度设计,以增强网络完整性.
- 提高机械性能,湿稳定性和纤维素泡的阻燃性.
主要方法:
- 微纤维化纤维素 (MFC) 网络的物理交联使用纤维素纳米纤维素 (CNF) 和离子 (Al3+).
- 冰晶模板,溶剂交换和蒸发以实现自我密集.
- 泡密度,孔隙度,机械模量和能量吸收的表征.
主要成果:
- 达到低密度 (40.7毫克-3厘米) 和高孔径 (97.3%).
- 证明了强大的网络完整性,具有高压缩模量 (1211.5 ± 60.6 kPa) 和能量吸收 (77.8 ± 1.9 kJ m-3).
- 呈现出优异的湿稳定性和火焰自灭能力.
结论:
- 多尺度设计成功地创造了高性能纤维素泡,具有卓越的网络完整性.
- 泡是可生物降解的,重新进入碳循环,提供可持续的材料解决方案.
- 这一战略为先进的,环保耐用的泡材料开辟了新的途径.
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