在局部的聚合物凝在封闭的流量控制间歇性动力学
Barrett T Smith1, Sara M Hashmi1,2,3
1Department of Chemical Engineering, Northeastern University, USA. s.hashmi@northeastern.edu.
Soft matter
|February 5, 2024
概括
这项研究揭示了像酸盐这样的交联聚合物如何间歇性地堵塞微流体通道. 研究人员绘制了流量边界的地图,并发现可控制,可重现的间歇性堵塞,为聚合物凝动力学提供了洞察力.
科学领域:
- 流体动力学 流体动力学
- 材料科学是一种材料科学.
- 生物物理学的生物物理.
背景情况:
- 聚合物通过小道的流动对于3D打印,石油回收和生物过程至关重要.
- 交叉连接显著改变了聚合物特性,影响了流动行为,并可能导致通道堵塞.
研究的目的:
- 为了研究在微流体通道中交叉连接期间的酸盐生物聚合物的流动力学.
- 将导致完全堵塞的条件与连续流动的条件映射出来.
- 为了描述间歇性堵塞的新奇现象.
主要方法:
- 微流体实验使用酸盐和交叉连接器在恒定流速.
- 聚合物度,交叉连接器度和流量率的系统变化.
- 观测和分析流量模式,包括完全堵塞,流量和间歇性堵塞.
主要成果:
- 建立了聚合物流动,堵塞和独特的间歇性堵塞制度的相位边界.
- 观察到间歇性堵塞是可重复的,持久的,并通过聚合物和交叉连接剂度可控制.
- 发现化交联凝在切除后形成微棒,保持其形状.
结论:
- 微通道中的交联聚合物的动态行为与合体干扰相位图有相似之处.
- 间歇性堵塞是一种可控制的现象,在微流体设备中具有潜在的应用.
- 了解这些动态对于优化涉及流动和交联聚合物的过程至关重要.
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