高等学校化学学报

高等学校化学学报 ›› 2012, Vol. 33 ›› Issue (12): 2765.doi: 10.7503/cjcu20120103

• 物理化学 • 上一篇    下一篇

全氟壬烯氧基苯磺酸钠与烷基季铵盐的相互作用

杨百勤1, 路国超1, 邢航2, 周洪涛3, 高岸涛4, 肖进新2   

  1. 1. 陕西科技大学化学与化工学院, 教育部轻化工助剂化学与技术重点实验室, 西安 710021;
    2. 北京氟乐邦表面活性剂技术研究所, 北京 100096;
    3. 中国石油大学(华东)石油工程学院, 青岛 266555;
    4. 北京理工大学化学系, 北京 100081
  • 收稿日期:2012-02-04 出版日期:2012-12-10 发布日期:2012-11-20
  • 通讯作者: 肖进新,男,博士,主要从事胶体与界面化学研究.E-mail:xiaojinxin@pku.edu.cn E-mail:xiaojinxin@pku.edu.cn
  • 基金资助:

    陕西省教育厅基金资助项目(批准号: 09JK364)资助.

Interactions Between Sodium p-Perfluorononenyloxy Benzene Sulfonate and Alkyl Quaternary Ammonium Salts

YANG Bai-Qin1, LU Guo-Chao1, XING Hang2, ZHOU Hong-Tao3, GAO An-Tao4, XIAO Jin-Xin2   

  1. 1. Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science and Technology, Xi'an 710021, China;
    2. Beijing FLUOBON Surfactant Institute, Beijing 100096, China;
    3. College of Petroleum Engineering, China University of Petroleum(Huadong), Qingdao 266555, China;
    4. Department of Chemistry, Beijing Institute of Technology, Beijing 100081, China
  • Received:2012-02-04 Online:2012-12-10 Published:2012-11-20
  • Contact: Jin-Xin Xiao E-mail:xiaojinxin@pku.edu.cn

PDF (PC)

被引次数

11

摘要：

通过六氟丙烯三聚体(全氟壬烯)氧基苯磺酸钠(C9F17OC6H4SO3Na, OBS)与阳离子碳氢表面活性剂CnNR[CnH2n+1N(CH3)3Br, CnNM, n=8, 10和CnH2n+1N(CH2CH3)3Br, CnNE, n=8, 10, 12]复配, 研究了OBS与CnNR的摩尔比、 CnNR疏水链长及CnNR亲水基团大小对此类阴、 阳离子碳氟-碳氢表面活性剂混合体系的临界胶束浓度(cmc)、 最低表面张力(γcmc)、 总饱和吸附量(Γtm)及极限分子面积(Amin)的影响. 结果表明, 通过与CnNR复配, OBS的cmc和γcmc均大幅下降, 达到了全面增效的结果. 不同摩尔比的OBS-C8NE混合体系中, 摩尔比为1:1时表面活性最好, cmc和γcmc均最小; 偏离等摩尔比时, OBS过量时混合体系的cmc小于C8NE过量时混合体系的cmc, 但γcmc相差不大. 与单体系相比, OBS-C8NE混合体系的Γtm明显增大、 Amin明显变小. OBS与不同疏水链长的CnNE复配时, cmc的变化规律为C8NE>C10NE>C12NE, 表明CnNE疏水链长的增加能降低混合体系的cmc. 通过比较CnNM和CnNE(n=8, 10)的表面活性发现, 改变混合体系中CnNR的亲水基团大小对混合体系的表面活性无明显影响.

关键词: 阴、 阳离子表面活性剂, 表面张力, 氟表面活性剂, 表面活性, 六氟丙烯三聚体

Abstract:

p-Perfluorononenyloxy benzene sulfonate(C9F17OC6H4SO3Na, OBS) a low-cost fluorinated surfactant. However, its surface activity is poor. In this work, OBS was mixed with different cationic hydrogenated surfactants, namely CnNR[CnH2n+1N(CH3)3Br(CnNM, n=8, 10) and CnH2n+1N(CH2CH3)3Br(CnNE, n=8, 10, 12)]. The effects of the molar ratio of OBS to CnNR, the hydrophobic chain length and the headgroup size of CnNR(R=M or E) on the critical micelle concentration(cmc), the minimum surface tension(γcmc), the maximum surface amount adsorbed(Γtm) and the limited surface area per molecule(Amin) for the mixtures of the cationic-anionic hydrogenated-fluorinated surfactants were investigated. The results showed that, after mixed with CnNR, both the cmc and γcmc of the system were greatly lowered, i.e. the efficiency was totally enhanced. The OBS-C8NE surfactant mixtures with molar ratio of 1:1 showed the best surface activity, i.e. the lowest cmc and γcmc, compared with the OBS-C8NE mixtures with other molar ratios. Meanwhile, when the molar ratio was apart from equimolarity, the cmc of OBS-excess systems were smaller than that of C8NE-excess systems, but the γcmc was not found to be significantly changed. Compared with single surfactant systems, the Γtm for the mixtures of OBS-C8NE was significantly increased and the Amin was significantly decreased. When OBS was mixed with CnNE with different alkyl chain length, the sequence of cmc for the mixtures was C8NE>C10NE>C12NE. It suggested that the increase of hydrophobic chain length of CnNE would induce the decrease of cmc of the mixtures. When the headgroup size of CnNR(n=8, 10) in the mixture was changed from —triethylammonium to —trimethylammonium, no significant change of the surface activity was found for the mixtures.

Key words: Cationic-anionic surfactant, Surface tension, Fluorocarbon surfactant, Surface activity, Hexafluoropropene trimer

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