Stability Mechanism of Mono-Glycerol Ester Foams

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Stability Mechanism of Mono-Glycerol Ester Foams

更新时间：2025-07-09

- Stability Mechanism of Mono-Glycerol Ester Foams
- Vol. 43, Issue 8, Pages: 130-134(2009)
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： O648.24
- Online First：10 August 2009，
  
  Published：2009
- 稿件说明：
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Stability Mechanism of Mono-Glycerol Ester Foams[J]. 2009, 43(8): 130-134.
DOI：

Stability Mechanism of Mono-Glycerol Ester Foams[J]. 2009, 43(8): 130-134. DOI：

摘要

对单甘油脂类表面活性剂单硬脂酸甘油酯(GMS)及单月桂酸甘油酯(GML)的发泡性能及泡沫稳定性进行研究

同时用十二烷基苯磺酸钠(SDBS)及α-烯基磺酸钠(AOS)做对比实验. 采用黏度仪和偏光显微镜分析溶液及泡沫相态的流变行为和微观结构

来探讨发泡性能及泡沫稳定性机理.结果显示

溶液浓度是主要影响因素

当w(GMS)为0.1%～10%时

发泡体积存在一个最大值

在同一浓度时其泡沫稳定时间长于GML.当w(GMS)达到4%时

其泡沫半衰期达到20 d以上.比较微观结构发现

溶液中超过临界胶束浓度(CMC)后形成的聚集体(层状液晶)具有减缓排液速率、增强Gibbs-Marangoni效应及使泡沫粒径均一化等特性

共同作用增加了泡沫稳定性.

Abstract

Glycerol monostearate(GMS)and glycerol monolaurate(GML)were investigated by viscometer and microscope. The results show that foams of GMS gets more steady than GML at the same concentration

the survival time of GMS/4%(mass fraction)foams persists over 20 days. The concentration of surfactant is the main factor for the survival time. Once the concentration exceeds the critical micelle concentration(CMC)

a great deal of lamellar liquid crystal(LLC)displaying the cross figure is discovered in the GMS solution

conversely

the extremely small amount in the GML

so the LLC may increase the foams stability. Furthermore

the same experiment was conducted to exhibit the identical conclusion by sodium dodecyl benzene sulfonate(SDBS)and α-olefin sulfonate(AOS). Three important factors enhance the stability of foams via slowing down the drainage speed of liquid films

increasing the Gibbs-Marangoni mechanism

and equalizing the bubble size.

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references

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