Mass transfer kinetics of PVP across oil-water interface by using micro visualization technique

XU Junhui; CHEN Jinfang; CHEN Zhong

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Mass transfer kinetics of PVP across oil-water interface by using micro visualization technique

更新时间：2025-12-10

- Mass transfer kinetics of PVP across oil-water interface by using micro visualization technique
- CIESC Journal Issue 5, (2007)
- 作者机构：
  
  1. 武汉工程大学化工与制药学院，湖北省新型反应器与绿色化学工艺重点实验室
  2. 中国五环化学工程公司
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：05 May 2007，
  
  Published：05 May 2007
- 稿件说明：
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XU Junhui, CHEN Jinfang, CHEN Zhong. Mass transfer kinetics of PVP across oil-water interface by using micro visualization technique[J]. CIESC Journal, 2007, (5).
DOI：

XU Junhui, CHEN Jinfang, CHEN Zhong. Mass transfer kinetics of PVP across oil-water interface by using micro visualization technique[J]. CIESC Journal, 2007, (5). DOI：

摘要

应用光电显微技术和数字图像分析技术，在微米级视场空间中

对聚乙烯吡咯烷酮（PVP）在二氯甲烷-水界面传质的非平衡动力学过程进行了可视化研究。对拍摄的10个不同浓度的PVP二氯甲烷溶液的图像进行灰度分析，建立了PVP二氯甲烷溶液的浓度-灰度标准曲线。通过测量不同传质时刻的PVP二氯甲烷主体相图像的灰度值，得到对应的浓度值。根据传质过程中二氯甲烷相中PVP的浓度随时间的变化关系，建立了PVP在二氯甲烷-水界面传质动力学曲线。观察并分析了油相近界面流体流型随时间、空间的渐变过程。

Abstract

A visualization system based on microscopy，photoelectric imaging analysis and digital processing was developed to investigate the micrometer-level mass transfer process of polyvinylpyrrolidone（PVP）across the interface of dichloromethane-water.The concentration-gray scale standard curves were obtained by measuring the gray scales of the images of 10 PVP dichloromethane solutions with different concentrations.The concentrations of PVP corresponding to different times were determined by measuring the gray scales of the images of PVP dichloromethane solutions at the corresponding times.The mass transfer kinetics curve of PVP across the interface of dichloromethane-water was then obtained.In addition，the evolution of flow field in the dichloromethane phase near the interface was observed and analyzed via the visualization system.

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