一种带有静电排斥的异性质水凝,在协同排列的纳米薄膜之间具有静电排斥
Mingjie Liu1, Yasuhiro Ishida1, Yasuo Ebina2
1RIKEN Center for Emergent Matter Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
Nature
|January 6, 2015
概括
这项研究介绍了一种新的复合水凝,利用对齐的酸纳米板之间的静电排斥. 这种仿生材料表现出异构的机械性能,灵感来自关节软骨,用于先进的应用.
科学领域:
- 材料科学 材料科学 材料科学
- 生物材料工程 生物材料工程
- 体科学 体科学 体科学
背景情况:
- 机器技术经常使用排斥力 (例如,磁铁列车),而材料设计优先考虑有吸引力的相互作用.
- 关节软骨是有效使用静电排斥在压缩下无摩擦关节运动的典范.
- 现有的复合材料主要依赖于有吸引力的填充剂-矩阵相互作用来增强性能.
研究的目的:
- 开发一种由静电排斥驱动的具有异型机械性质的复合水凝.
- 在合成材料中模仿关节软骨的功能效率.
- 探索使用磁场来控制水凝中的纳米结构对齐.
主要方法:
- 复合水凝的制造与嵌入的,负电荷的单状酸纳米板.
- 使用强磁场来诱导纳米薄膜在合分散中的面对面对齐.
- 通过光触发的 in situ 乙烯基聚合来固定对齐的结构.
- 描述了对剪切和压力作用的异型机械反应.
主要成果:
- 通过磁场诱导的面对面对齐,实现了纳米板的宏观,准晶体结构排序.
- 由此产生的水凝具有显著的异构性:在平行剪切下容易变形,抗直角压缩.
- 证明了对齐的纳米薄膜之间的静电排斥主导了材料的机械行为.
结论:
- 开发的水凝成功地利用了异型静电排斥,灵感来自于像软骨这样的生物系统.
- 磁场辅助对齐和光聚合的方法为创建功能软材料提供了一条新的途径.
- 这种方法为设计先进的软材料提供了途径,这些材料具有可调节的,异性质的特性,可用于各种应用.
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