高等学校化学学报 ›› 2019, Vol. 40 ›› Issue (4): 809.doi: 10.7503/cjcu20180605

• 物理化学 • 上一篇    下一篇

聚醚类破乳剂的界面扩张流变性质

李浩程1, 高原1, 辛迎春1, 宗华1, 刘慧英1, 张磊2(), 张路2()   

  1. 1. 中石化节能环保工程科技有限公司山东分公司, 东营 257027
    2. 中国科学院理化技术研究所, 北京 100190
  • 收稿日期:2018-08-30 出版日期:2019-04-10 发布日期:2019-01-09
  • 作者简介:联系人简介: 张 路, 男, 博士, 高级工程师, 主要从事胶体与界面科学方面的研究. E-mail: luyiqiao@hotmail.com;张 磊, 女, 博士, 副研究员, 主要从事胶体与界面科学方面的研究. E-mail: zl2558@163.com
  • 基金资助:
    国家科技重大专项(批准号: 2016ZX05011-004)和国家自然科学基金(批准号21703269)资助.

Interfacial Dilational Rheology of Polyether Demulsifiers

LI Haocheng1, GAO Yuan1, XIN Yingchun1, ZONG Hua1, LIU Huiying1, ZHANG Lei2,*(), ZHANG Lu2,*()   

  1. 1. SINOPEC Energy and Environmental Engineering Co., Ltd., Shandong Branch, Dongying 257027
    2. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190
  • Received:2018-08-30 Online:2019-04-10 Published:2019-01-09
  • Contact: ZHANG Lei,ZHANG Lu E-mail:zl2558@163.com;luyiqiao@hotmail.com
  • Supported by:
    † Supported by the National Science and Technology Majer Project of China(No.2016ZX05011-004) and the National Natural Science Foundation of China(No.21703269).

摘要:

采用悬挂滴方法研究了不同结构聚醚类破乳剂与煤油间的界面张力及界面扩张流变性质. 结果表明, 4种聚醚类破乳剂均具有较强的降低界面张力能力, 且支链化程度越低分子在界面上排列越紧密, 直线型破乳剂在低浓度条件下界面张力最低. 破乳剂的分子尺寸较大, 慢弛豫过程控制界面膜性质, 吸附膜以弹性为主. 同时, 柔性聚氧乙烯链和聚氧丙烯链对界面膜性质的影响较大, 随着支链化程度增大, 界面分子间相互作用增强, 界面膜弹性增强, 黏性降低.

关键词: 聚醚, 破乳剂, 扩张弹性, 扩张黏性, 界面

Abstract:

The interfacial tension and dilational rheological properties between polyether demulsifiers with different structures and kerosene were investigated by means of oscillating drop method. The experimental results show that four types of polyether demulsifiers have good abilities in reducing interfacial tension. The demulsifier with straight-chain reduces interfacial tension dramatically at low concentration because the demulsifier with low branched permits closer packing. The slow relaxation process dominates the nature of interfacial film due to larger molecular size of demulsifier. Therefore, all interfacial films of four polyether demulsifiers appear strongly elastic nature. At the same time, the flexible ethylene oxide chains and propylene oxide chains have a big influence on the properties of interfacial film: highly branched of polyether demulsifier enhances the molecular interaction, which results the increase in the elastic nature of film and the decrease of dilational viscosity.

Key words: Polyether, Demulsifier, Dilational elasticity, Dilational viscosity, Interface

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