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相关概念视频

Colloidal precipitates01:09

Colloidal precipitates

521
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
521

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相关实验视频

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Generation of Size-controlled Poly ethylene Glycol Diacrylate Droplets via Semi-3-Dimensional Flow Focusing Microfluidic Devices
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通过界面粒子阻塞的剧烈滴滴变形.

Luoran Shang1,2, Ke Xu3, Peter J Lu1,4

  • 1John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138.

Proceedings of the National Academy of Sciences of the United States of America
|October 10, 2024
PubMed
概括
此摘要是机器生成的。

稳定粒子滴在剪切流下独特地变形,形成纹和化的弹性外. 这创造了新的核心外结构,可通过像佩克莱特数这样的流量条件来控制.

关键词:
合物 合物 合物滴滴滴滴滴滴滴滴滴滴滴滴滴滴干扰是干扰的微流体学 在微流体学方面表面活性剂是一种表面活性剂.

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科学领域:

  • 流体动力学 流体动力学
  • 体科学是关于体的科学.
  • 材料科学 是一种材料科学.

背景情况:

  • 不混合的液体中的水滴通常是球形的,这是由于界面张力.
  • 表面活性剂和体颗粒稳定滴滴,但使用不同的机制.
  • 粒子稳定在压缩下创造了一个类似固体的接口,与表面活性剂不同.

研究的目的:

  • 研究粒子稳定不对称性对剪切下滴状物形状的影响.
  • 在微通道中探索粒子稳定滴滴的独特变形.
  • 了解粒子迁移和阻塞如何影响滴滴形态.

主要方法:

  • 在受约束的微通道中,将颗粒稳定的滴滴置于剪切流.
  • 观察滴水形状动态和粒子分布.
  • 分析皮克莱特数对滴滴变形的影响.

主要成果:

  • 剪切诱导粒子迁移,在滴滴后面形成弹性外.
  • 观察到弹性外的纹和化.
  • 形成独特的核心外滴状结构.
  • 滴滴形状取决于佩克莱特数,平衡剪切和扩散.

结论:

  • 粒子稳定接口中的不对称力导致复杂的滴滴变形.
  • 剪切流可以可控地创建各种各样的滴状形状,包括核心外结构.
  • 这些发现为粒子界面相互作用和微流体操纵提供了洞察力.