热史不对称性和消散在密集的合体微凝玻璃中
Sonali Vasant Kawale1, Yogesh M Joshi2, Ranjini Bandyopadhyay1
1Soft Condensed Matter Group,Raman Research Institute, C. V. Raman Avenue, Sadashivanagar, Bangalore, 560 080, Karnataka, India.
Journal of colloid and interface science
|January 14, 2026
概括
密集的微凝悬浮体表现出历史依赖的结构恢复. 在热冲击期间,微凝重排的能量消散有助于消除存储模块中路径依赖的不对称性,可通过道速率和包装密度进行控制.
科学领域:
- 软物质物理学 软物质物理学
- 类风病学 类风病学 类风病学
- 体科学是一种体科学.
背景情况:
- 微观结构上被捕的物质,包括分子和柔软的玻璃状材料,表现出热或机械历史的记忆.
- 非线性,历史依赖的微结构恢复通常使用Kovacs框架进行分析.
研究的目的:
- 为了研究密集的合体悬浮物的非线性,路径依赖的结构恢复.
- 在热敏的微凝颗粒上利用温度坡道来探测这些恢复动态.
主要方法:
- 通过自由基沉聚合合成的聚N-异烯胺 (PNIPAM) 微凝粒的合成.
- 振荡性风湿学被用来研究弹性模块放松在密集的PNIPAM悬浮在不同的温度坡速率下.
主要成果:
- 路径依赖的结构恢复是通过弹性模量对加热和冷却坡道期间目标温度的不对称方法来量化.
- 与微凝重新排列能耗相关的损失模量峰值与弹性响应不对称相反相关.
- 通过微凝重新排列的能量消散被证明可以消除存储模块中依赖路径的不对称性.
结论:
- 微凝重新排列在受到热冲击的密集PNIPAM悬浮物的存储模块中的不对称性减轻起着至关重要的作用.
- 调节不对称的储存模块放松是通过调整温度坡速率和颗粒堆积密度来实现的,影响可访问的自由体积.
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