DETERMINATION OF DYNAMIC INTERFACIAL TENSION BY COMPUTER-AIDED PENDANT DROP DIGITIZATION ——EFFECT OF SURFACTANT CONCENTRATION ON DIT

LI Xiaofeng; CHEN Zhirong; PAN Haihua; LIU Dixia; LI Haoran; HAN Shijun

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DETERMINATION OF DYNAMIC INTERFACIAL TENSION BY COMPUTER-AIDED PENDANT DROP DIGITIZATION ——EFFECT OF SURFACTANT CONCENTRATION ON DIT

更新时间：2025-12-10

- DETERMINATION OF DYNAMIC INTERFACIAL TENSION BY COMPUTER-AIDED PENDANT DROP DIGITIZATION ——EFFECT OF SURFACTANT CONCENTRATION ON DIT
- CIESC Journal Issue 6, (2001)
- 作者机构：
  
  1. 浙江大学化学系
  2. 浙江大学化学工程系
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：25 June 2001，
  
  Published：25 June 2001
- 稿件说明：
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LI Xiaofeng, CHEN Zhirong, PAN Haihua, et al. DETERMINATION OF DYNAMIC INTERFACIAL TENSION BY COMPUTER-AIDED PENDANT DROP DIGITIZATION ——EFFECT OF SURFACTANT CONCENTRATION ON DIT[J]. CIESC Journal, 2001, (6).
DOI：

LI Xiaofeng, CHEN Zhirong, PAN Haihua, et al. DETERMINATION OF DYNAMIC INTERFACIAL TENSION BY COMPUTER-AIDED PENDANT DROP DIGITIZATION ——EFFECT OF SURFACTANT CONCENTRATION ON DIT[J]. CIESC Journal, 2001, (6). DOI：

摘要

Abstract

A pendant drop tensiometry apparatus aided by video-image digitization technology was established

by which static interface or surface tension of some liquids was measured with satisfactory results.In order to study the effect of emulsifier concentration on emulsion stability

dynamic interfacial tension was measured between toluene and water against concentration of Tween 60(Polyoxyethylene(20) stearyl-sorbitanate). As expected

higher concentration is the Tween 60 solution in toluene injected into the toluene phase

faster falls the interface tension between toluene and water.Furthermore

it reveals interestingly that two steps of diffusion occur in the system

i.e .

at low and high concentration

after the surfactant solution is injected.The characteristic process of dynamic interface tension can be ascribed to diffusion control because of linearity between interface tension and the minus second root of aging time.The discovery is correlated to the fact that much higher concentration of surfactant above its critical micelle concentration is often required when a stable emulsion is planned to prepare.

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