纤维素纳米晶-稳定生物基水性聚氧氨纳米复合材料,具有增强的粘合性能
Hsin-Chen Chen1,2, Gilles Sèbe2, Thomas Vidil2
1Division of Glycoscience, Department of Chemistry, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, AlbaNova University Centre, SE-106 91 Stockholm, Sweden.
概括
这项研究引入了可持续的,高性能粘合剂,使用由纤维素纳米晶体 (CNCs) 稳定的生物基聚氨 (PHUs). 这种绿色化学方法可以提高粘合力的强度,而不需要危险的化学物质或表面活性剂.
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
- 绿色化学 绿色化学
背景情况:
- 传统的聚氨 (PU) 使用危险的异酸盐和基于溶剂的方法.
- 对于可持续和高性能粘合材料的需求日益增长.
研究的目的:
- 使用生物基单体和纤维素纳米晶体 (CNCs) 开发水性聚氧氨 (PHUs).
- 研究CNC作为PHU合成中的稳定剂和强化剂的潜力.
- 为了评估由此产生的PHU/CNC纳米复合材料的粘合性能.
主要方法:
- 通过使用1,6-hexanediol bis- ((环碳酸盐) 和生物基Priamine 1075的无催化剂悬浮聚合合成水性PHU.
- 使用原始纤维素纳米晶体 (CNC) 作为底部稳定剂和增强纳米填充剂.
- 描述了乳液的合稳定性和干燥纳米复合材料中CNC的分布.
主要成果:
- 实现了高CNC负载 (高达~17%重量) 的稳定单体在水中的乳液.
- 在乳中的粒子表面定位的CNC,确保稳定性,并在干燥的纳米复合材料中均分散.
- 与传统方法相比,观察到探针粘合强度 (高达680%) 和膝盖剪切强度 (高达340%) 的显著提高.
结论:
- 由CNC稳定的生物基PHU为高性能粘合剂提供了可持续的途径.
- CNCs作为有效的稳定剂和增强剂,改善机械性能.
- 这种方法符合绿色化学原则,减少对危险化学品和石油衍生表面活性剂的依赖.
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