化工学报 ›› 2012, Vol. 63 ›› Issue (6): 1943-1950.DOI: 10.3969/j.issn.0438-1157.2012.06.042

• 材料化学工程与纳米技术 • 上一篇    下一篇

疏水型二氧化硅粒子对泡沫体系稳定性的影响

茹冕1,常志东1,罗文利2,李文军1,顾少楠1,张永强1,邱红1,牛佳玲2   

  1. 1北京科技大学化学与化学工程系, 北京 100083;2中国石油勘探开发研究院, 北京 100083
  • 收稿日期:2011-11-16 修回日期:2012-02-21 出版日期:2012-06-05 发布日期:2012-06-05
  • 通讯作者: 常志东

  Influence of hydrophobically modified silicon dioxide particles on stability of EOR flooding foam

RU Mian1,CHANG Zhidong1,LUO Wenli2,LI Wenjun1,GU Shaonan1,ZHANG Yongqiang1,QIU Hong1,NIU Jialing2   

  1.  
    1Department of Chemistry and Chemical Engineering, University of Science and Technology Beijing, Beijing100083, China;2Research Institute of Petroleum Exploration and Development ,Beijing 100083,China
  • Received:2011-11-16 Revised:2012-02-21 Online:2012-06-05 Published:2012-06-05

摘要: 本文对市售二氧化硅粒子进行疏水改性,分别用改性前和改性后的二氧化硅粒子与十二烷基硫酸钠制备泡沫分散液,探讨了二氧化硅粒子亲、疏水性,粒子浓度,粒子在气/液界面膜上的吸附量以及动态拉伸条件下的液膜稳定性的变化规律。研究结果表明,在搅拌条件下,与改性后粒子相比,改性前粒子对维持泡沫体系的起泡性和稳定性作用较强。泡沫稳定性随二氧化硅粒子质量分数的增加而增大,在粒子浓度为0.05%时达到最大值。在拉伸条件下,改性后粒子对液膜稳定性的增强效果优于改性前粒子的作用。改性后二氧化硅粒子质量分数为0.05%的分散液的液膜拉伸最长。

关键词: 泡沫, 稳定性, 二氧化硅粒子, 疏水性, 拉伸

Abstract: The surface of commercial silicon dioxide particles was hydrophobically modified in this paper. The aqueous foams were prepared by stirring mixtures of dodecyl sulfate sodium (SDS) and particles before or after surface modification. The hydrophobicity of particles, the particle additions, the concentration of particles adsorbed on the air/water interface and the stability of dynamic stretching liquid film were investigated. Results shows that the foamability and foam stability of the hydrophilic silica/SDS dispersion is better than that of the modified silica particle/SDS dispersion. The foam stability increases with the increase of the particle addition and it reaches a maximum with the particle addition of 0.05 wt%. However, in dynamic stretching conditions, the liquid film can be stabilized by hydrophobically modified silica particles. The stretch length of liquid film reaches maximum at the particles addition of 0.05 wt%.

Key words: foam;foam stability, silicon dioxide particles, hydrophobicity, dynamic tensile