生物灵感集成辅助性弹性体,通过双动态界面治愈策略构建
Zhiran Zheng1, Jiawei Li1, Kailun Wei1
1Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, North Third Ring Road 15, Chaoyang District, Beijing, 100029, China.
Advanced materials (Deerfield Beach, Fla.)
|July 12, 2023
概括
本研究介绍了一种集成辅助性弹性体 (IAE),可以克服传统辅助性材料的机械削弱. 这种新型弹性体保持了 Poisson 的负值.
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
- 机械工程 机械工程
背景情况:
- 辅助性材料在轴向拉伸下表现出独特的横向扩张.
- 传统的辅助性材料往往由于切割等减去性制造工艺而受到机械性能的降低.
- 自然的骨结构激发了对材料设计的新方法.
研究的目的:
- 开发一种没有空隙的,具有增强机械性能的集成辅助性弹性体 (IAE).
- 解决传统辅助性材料中的机械降解问题.
- 为工程应用创造强大的辅助性材料.
主要方法:
- 使用高模块交叉链聚氨urea骨架和低模块非交叉链聚氨urea矩阵制造IAE.
- 利用二硫化物键和键进行双动态界面治愈.
- 通过有限元分析确认属性.
主要成果:
- IAE是平的,没有空隙,没有尖的接口.
- 与骨架单独相比,骨折强度增加了400%,骨折时延伸增加了150%.
- 在一个很大的菌株范围 (0%-104%) 中保留了负波桑比率 (NPR).
结论:
- 综合混合材料方法成功地提高了机械性能,同时保持了辅助性质.
- 这种方法为强大的辅助性材料提供了一个有前途的解决方案,克服了减法制造的局限性.
- 开发的IAE显示了对需要高性能和大变形能力的先进工程应用的巨大潜力.
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