Influence of double emulsions solidification rate on sphericity of poly(α-methyl styrene)capsules in microencapsulation process

CHEN Sufen; LIU Yiyang; SU Lin; QI Xiaobo; SHI Ruiting; LIU Meifang; ZHANG Zhanwen; LI Bo

doi:10.3969/j.issn.0438-1157.2013.07.019

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Influence of double emulsions solidification rate on sphericity of poly(α-methyl styrene)capsules in microencapsulation process

更新时间：2025-12-10

- Influence of double emulsions solidification rate on sphericity of poly(α-methyl styrene)capsules in microencapsulation process
- CIESC Journal Issue 7, Pages: 2446-2452(2013)
- 作者机构：
  
  中国工程物理研究院激光聚变研究中心,四川,绵阳,621900
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2013.07.019
  CLC： L639.11
- Online First：05 July 2013，
  
  Published：05 July 2013
- 稿件说明：
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CHEN Sufen, LIU Yiyang, SU Lin, et al. Influence of double emulsions solidification rate on sphericity of poly(α-methyl styrene)capsules in microencapsulation process[J]. CIESC Journal, 2013, (7): 2446-2452.
DOI：

CHEN Sufen, LIU Yiyang, SU Lin, et al. Influence of double emulsions solidification rate on sphericity of poly(α-methyl styrene)capsules in microencapsulation process[J]. CIESC Journal, 2013, (7): 2446-2452. DOI： 10.3969/j.issn.0438-1157.2013.07.019.

摘要

为实现对制备聚-α-甲基苯乙烯(PAMS)空心微球的乳液微封装过程中双重乳液固化速率的调控

实验测量了不同固化工艺条件下双重乳液中油相有机溶剂氟苯向外水相的扩散速率

研究了双重乳液固化速率对最终PAMS微球球形度的影响。结果表明

改变外水相中的氟苯浓度可以控制油相溶剂氟苯向外水相扩散的速率

从而改变双重乳液的固化速率。在双重乳液固化过程的关键阶段

通过降低氟苯扩散速率来延缓双重乳液的固化速率是提高最终PAMS微球球形度的有效途径。通过优化双重乳液的固化速率

单批次PAMS微球中球形偏离度值低于1 μm的微球比例从1.9%提高到30.4%。

Abstract

To study the influence of solidification rates of double emulsions on the sphericity of the resulting poly(α-methyl styrene)(PAMS)capsules in the microencapsulation process of PAMS capsules

the diffusion rates of fluorobenzene from oil phase to outer water phase under different conditions were experimentally measured

and the curing process of double emulsions under corresponding curing conditions were investigated.The results showed that the concentration of fluorobenzene in the outer water phase had a significant effect on the diffusion rate of fluorobenzene

which directly determined the solidification rate of double emulsions and then the sphericity of the resulting PAMS capsules.During the key phase of the solidification process of double emulsions

keeping proper concentrations of fluorobenzene in the outer water phase could remarkably reduce the solidification rate of double emulsions and consequently improve the sphericity of PAMS capsules.By optimizing the concentration of fluorobenzene in the outer water phase

the batch percentages of PAMS capsules with out-of-round less than 1 μm increased from 1.9% to 30.4%.

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