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相关概念视频

Precipitate Formation and Particle Size Control01:16

Precipitate Formation and Particle Size Control

In precipitation gravimetry, the precipitating agent should react specifically or selectively with the analyte. While a specific reagent reacts with the analyte alone, a selective reagent can react with a limited number of chemical species.
The obtained precipitate should be either a pure substance of known composition or easily converted to one by a simple process, such as ignition or drying. In addition, the precipitate should be insoluble and easily filterable. In general, filterability...
Colloidal precipitates01:09

Colloidal precipitates

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...

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相关实验视频

Updated: Jul 11, 2026

Continuous Flow Chemistry: Reaction of Diphenyldiazomethane with p-Nitrobenzoic Acid
07:06

Continuous Flow Chemistry: Reaction of Diphenyldiazomethane with p-Nitrobenzoic Acid

Published on: November 15, 2017

在连续微流体反应器中产生的各种形状和形态的聚合物颗粒.

Zhihong Nie1, Shengqing Xu, Minseok Seo

  • 1Department of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario, M5S 3H6 Canada.

Journal of the American Chemical Society
|June 2, 2005
PubMed
概括

我们开发了一种微流体方法,用于可扩展的核心液滴和聚合物囊的生产. 这种技术允许精确控制滴滴特性,并使各种聚合物颗粒形状的合成成为可能.

科学领域:

  • 材料科学 材料科学 材料科学
  • 化学工程是化学工程的重要组成部分.
  • 流体动力学 流体动力学

背景情况:

  • 微流体设备提供精确控制流体操纵.
  • 单分散核心外结构的连续生产具有挑战性.
  • 有兴趣的是可控形态的聚合物颗粒的合成.

研究的目的:

  • 提出一种新的微流体方法,用于连续和可扩展的核心滴和聚合物囊的生产.
  • 为了证明对滴滴大小,外厚度和核心数量/位置的控制.
  • 合成各种形状和形态的聚合物颗粒.

主要方法:

  • 在微流体装置中利用毛细管不稳定性驱动的两种不混合的流体喷气的分解.
  • 实现了精确的乳化控制,用于单分散的核心外液滴形成.
  • 采用快速吞吐量光聚合用于固和粒子生成.

主要成果:

  • 成功地产生了高度单分散的核心外滴,具有控制的核心直径和外厚度.
  • 对滴滴内核的数量和空间排列有明显控制.
  • 生成的聚合物颗粒具有各种形态,包括球体,截断的球体,半球和单核/多核囊.

更多相关视频

Fabricating High-viscosity Droplets using Microfluidic Capillary Device with Phase-inversion Co-flow Structure
08:02

Fabricating High-viscosity Droplets using Microfluidic Capillary Device with Phase-inversion Co-flow Structure

Published on: April 17, 2018

Patterning of Microorganisms and Microparticles through Sequential Capillarity-assisted Assembly
10:17

Patterning of Microorganisms and Microparticles through Sequential Capillarity-assisted Assembly

Published on: November 4, 2021

相关实验视频

Last Updated: Jul 11, 2026

Continuous Flow Chemistry: Reaction of Diphenyldiazomethane with p-Nitrobenzoic Acid
07:06

Continuous Flow Chemistry: Reaction of Diphenyldiazomethane with p-Nitrobenzoic Acid

Published on: November 15, 2017

Fabricating High-viscosity Droplets using Microfluidic Capillary Device with Phase-inversion Co-flow Structure
08:02

Fabricating High-viscosity Droplets using Microfluidic Capillary Device with Phase-inversion Co-flow Structure

Published on: April 17, 2018

Patterning of Microorganisms and Microparticles through Sequential Capillarity-assisted Assembly
10:17

Patterning of Microorganisms and Microparticles through Sequential Capillarity-assisted Assembly

Published on: November 4, 2021

结论:

  • 报告的微流体方法使核心滴和聚合物囊的连续和可扩展的合成成为可能.
  • 该技术可以精确控制滴水和颗粒的特性,包括形状.
  • 这种方法对于生产一系列用于各种应用的聚合物颗粒具有多样性.