在动态扰动下结合体凝:与古典行为背离
Bin Xia1, Xiaorong Wang1,2
1School of Chemical Science and Engineering, Tongji University, Shanghai 200092, China.
Gels (Basel, Switzerland)
|December 24, 2025
概括
动态剪切扰动显著影响合凝,挑战经典理论. 微观结构的变化取决于激发频率,而不仅仅是应变,这表明粒子阻塞控制了液体到固体的过渡.
科学领域:
- 合体和表面科学科学
- 类风病学 类风病学 类风病学
- 软物质物理学 软物质物理学
背景情况:
- 凝是软材料中的一个关键过渡.
- 经典的凝理论假设凝点的频率独立的质性质.
- 了解动态扰动效应对于软体系统至关重要.
研究的目的:
- 为了研究动态扰动对模型体系统中的凝行为的影响.
- 为了确定凝动态对振荡频率,应变幅度和剪切速率幅度的依赖.
- 将实验结果与古典凝理论和粒子干扰物理学进行比较.
主要方法:
- 在二甲中使用水性二氧化颗粒的模型体系统.
- 对系统应用了动态剪切扰动.
- 测量了各种频率,应变幅度和剪切速率的风湿性质.
主要成果:
- 凝动态显示出明显的依赖于应用剪切的频率.
- 应变幅度和剪切速率幅度对凝的影响最小.
- 观察到的行为偏离了古典凝理论的预测.
结论:
- 机械刺激的时间尺度调节了在凝结值附近的微观结构重组.
- 在动态扰动下,传统的凝标准在动态扰动下效果较差.
- 液体到固体的转变更符合粒子阻塞,而不是聚合物网络的形成.
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