活性兴奋剂控制密集的合体凝中故障的模式
Tingtao Zhou1,2, John F Brady1,2
1Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125.
概括
将活性粒子添加到无序的材料中,改变了它们的机械性质. 关键的"游泳力"决定了材料是否脆弱或柔性失败,改变了它的结构和反应.
科学领域:
- 软物质物理学 软物质物理学
- 材料科学 材料科学 材料科学
- 统计力学 统计力学
背景情况:
- 无序材料的机械性能取决于它们的自由能量格局.
- 活性粒子引入不平衡的内部场,影响材料的行为.
研究的目的:
- 研究活粒子活动如何改变合体凝的机械反应.
- 确定活性粒子在机械故障模式中的"游泳力"的作用.
主要方法:
- 计算机模拟了深聚分散合体凝的计算机模拟.
- 分析机械性能,凝多孔性和结构障碍.
主要成果:
- 确定了一个关键的游泳力,导致机械性能急剧下降.
- 在临界力以下:通过增加结构障碍增强的延展性.
- 在临界力以上:异质结构,动态异质性控制反应.
结论:
- 活性粒子游泳力决定了形凝中的脆性与柔性失效.
- 凝多孔性和粒子间力量的调节改变了机械反应.
- 观察到凝能量景观和嵌入式活动之间的复杂相互作用.
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