您好，欢迎访问黑龙江省农业科学院 机构知识库！
黑龙江省农业科学院机构知识库

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

Dilational Rheological Properties of Non-Ionic Surfactants at the Water-Decane Interface: Effect of Unsaturated Hydrophobic Group

文献类型： 外文期刊

作者： Song, Weifeng 1 ; Tao, Bo 1 ;

作者机构： 1.Northeast Agr Univ, Coll Agr, 59 Mucai Rd, Harbin 150030, Peoples R China

2.Heilongjiang Acad Agr Sci, Inst Agr Chem, Harbin, Peoples R China

关键词： Dilational modulus;dilational phase angle;non-ionic surfactant;temperature;unsaturated hydrophobic group

期刊名称：JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY （ 影响因子：2.262； 五年影响因子：2.064 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： The interfacial tensions and dilational properties of adsorbed films of two non-ionic surfactants with different hydrophobic groups, polyoxy-ethylene sorbitan stearate (Tween 60) and polyoxy-ethylene sorbitan monooleate (Tween 80), at the water-decane interface have been investigated by the drop-shape analysis method. The effects of dilational frequency and bulk concentration on the interfacial properties were expounded. The influence of low temperature on the interfacial tensions and dilational properties have also been researched. The experiment results show that the interfacial activity of Tween 80 is rather large compared with Tween 60. The minimum area per molecule at the water-decane interface (A(min)) value of Tween 80 is little large than that of Tween 60, which is due to the steric effect of unsaturated double bond in Tween 80 molecule. The dilational data show that the ethylene oxide groups of non-ionic surfactant form a stable sub-layer, which results in the increase of modulus and the decrease of phase angle for both Tween 60 and Tween 80 than those of common ionic surfactants. Moreover, the unsaturated hydrophobic group of Tween 80 is much flexible, which is easily crosslinked and entangled. Therefore, dilational modulus of Tween 80 is higher and phase angle is lower than that of Tween 60. Low temperature decreases the flexibility of unsaturated hydrophobic group and lessens the influence on the interaction of saturated hydrophobic group. Saturated surfactant molecules of Tween 60 almost lose temperature response.

  • 相关文献

[1]Effect of Hydrophobic Chain Length on the Interfacial Dilational Rheological Properties of Polyoxyethylene Sorbitan Fatty Acid Ester. Li Ming,Cao Chong,Xiong Ke-Jie,Du Feng-Pei,Li Ming. 2015

作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：黑龙江省农业科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台