在强流模式下,量化聚合合物悬浮中的电子传输
Julie B Hipp1, Paolo Z Ramos2, Qingsong Liu2
1Center for Neutron Science, Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE 19716.
概括
流动复合材料中的电子传输与微观结构和动力学有关. 这项研究揭示了剪切增强粒子碰撞在导电碳黑悬浮中主导电子运输.
科学领域:
- 软物质物理学 软物质物理学
- 体科学是一种体科学.
- 电化学 电化学 电化学
背景情况:
- 复杂流体中的电子运输对于氧化还原反应和能量储存至关重要.
- 导体-绝缘体复合材料的电性能取决于导电相微观结构和动态.
- 缺乏对这些效应的统一描述,特别是在流下.
研究的目的:
- 开发一个统一的电子运输在流动的导电合体悬浮液的描述.
- 研究微观结构,动力学和剪切下的电性质之间的相互作用.
- 为了合理化有关切削依赖电性质的相互矛盾的文献数据.
主要方法:
- 碳黑 (CB) 颗粒悬浮物的测量导电性和剪切粘度.
- 利用梅森号来识别在不同的流量条件下等效的微结构状态.
- 分析了流量诱导的动态及其对电子传输的影响.
主要成果:
- 观察到导电性和剪切率之间的竞争关系.
- 证明剪切增强的粒子对粒子碰撞是在等效微观结构状态下电子运输的主要因素.
- 成功分离了动力学在流动诱导电子传输中的作用.
结论:
- 流动复合材料中的电子传输由剪切增强粒子碰撞控制.
- 梅森数有效地使流动悬浮中的微结构状态正常化.
- 这项工作为理解动态复合系统中的电性质提供了一个统一的框架.
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