在纤维素纳米晶体悬浮中具有关键类型的凝动力学
Lise Morlet-Decarnin1, Thibaut Divoux1, Sébastien Manneville1,2
1ENSL, CNRS, Laboratoire de Physique, F-69342 Lyon, France.
ACS macro letters
|December 8, 2023
概括
研究人员使用机械光谱学研究了纤维素纳米晶 (CNC) 凝动态. 他们在sol-gel过渡时观察到类似临界的动态,揭示了这些体系统的普遍缩放规律.
科学领域:
- 材料科学 材料科学 材料科学
- 合体和表面化学
- 类风病学 类风病学 类风病学
背景情况:
- 纤维素纳米晶体 (CNCs) 是充电的,棒状的体颗粒.
- 它们自组装成物理凝,作为生物基复合材料的前体有价值.
- 了解CNC凝动态对于材料设计至关重要.
研究的目的:
- 在剪切停止后研究纤维素纳米晶 (CNC) 悬浮物的凝动力学.
- 为了描述在sol-gel过渡过程中的粘弹性行为.
- 探索盐度对凝原理的影响.
主要方法:
- 使用时间分辨率的机械光谱学.
- 在sol-gel过渡过程中获得了线性粘弹性光谱.
- 数据被重新缩放到代表液态和固态的主曲线上.
主要成果:
- 确定了两个不同的粘弹性状态 (液体和固体),由一个临界凝点分开.
- 重缩参数在临界凝点不对称地分离,遵循超缩关系.
- 观察时间连接性和时间度叠加原理,受盐含量的影响.
结论:
- 该研究提供了CNC凝动态的详细图片.
- 凝点的临界类行为表明合体凝的普遍缩放规律.
- 盐度在控制CNC凝的时间依赖性组装和性能方面发挥着关键作用.
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