高等学校化学学报

高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (8): 1583.

• 研究论文 • 上一篇    下一篇

皂荚素的表面活性及其二元体系的热力学研究

王正武1, 李干佐1, 牟建海1, 关大任1, 廖莉玲2, 娄安境3   

  1. 1. 山东大学化学与化工学院, 济南 250100;
    2. 贵州师范大学化学系, 贵阳 550001;
    3. Langmuir Center for Colloids and Interfaces Columbia University, NY10027, U.S.A
  • 收稿日期:2001-04-02 出版日期:2002-08-24 发布日期:2002-08-24
  • 通讯作者: coliw@sdu.edu.cn
  • 作者简介:李干佐(1938年出生),男,教授,博士生导师,从事表面活性物理化学研究.E-mail:coliw@sdu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:2990300629973023);2000年教育部重点实验室访问学者基金资助

Studies of the Surface Activity of Gleditsin and the Thermodynamic Properties of Its Binary Mixtures

WANG Zheng-Wu1, LI Gan-Zuo1, MU Jian-Hai1, GUAN Da-Ren1, LIAO Li-Ling2, LOU An-Jin3   

  1. 1. Key Lab of Colloid and Interface Chemistry for State Education Ministry, Shandong University, Jinan 250100, China;
    2. Department of Chemistry, Guizhou Normal University, Guiyang 550001, China;
    3. Langmuir Center for Colloids and Interfaces, Columbia University, NY 10027, U.S.A
  • Received:2001-04-02 Online:2002-08-24 Published:2002-08-24

PDF (PC)

被引次数

20

摘要： 通过表面张力的测定研究了皂荚素(GS)的表面活性及其热力学性质随温度的变化.测定了皂荚素分别与十二烷基磺酸钠、十二烷基聚氧乙烯醚硫酸钠、全氟辛酸钠、十二烷基脂肪醇聚氧乙烯(9)醚、辛基酚聚氧乙烯(10)醚及十六烷基三甲基溴化铵等复配的表面张力-浓度对数关系(γ～lgc)曲线,并用二维晶格模型及正规溶液理论计算了含皂荚素的二元表面活性剂溶液表面吸附层的组成、分子相互作用参数及分子交换能.结果表明,皂荚素主要呈现非离子表面活性剂的性质,与阳离子表面活性剂复配呈微弱的离子性.复配后分子交换能均小于零,复配增效.增效顺序为GS/阳离子>GS/非离子>GS/阴离子(表面活性剂复配体系).

关键词: 皂荚素, 表面活性剂, 表面张力, 二维晶格模型, 分子相互作用参数, 分子交换能

Abstract: The surface activity and the thermodynamic properties of gleditsin saponin(GS)(C29 H46(OH)COOH) were studied by surface tension method at 0, 15, 25, 35, 45 and 60 ℃. With the method, the surface activity of its binary aqueous solutions with C12 H25-SO3Na(AS), C12 H25 (OC2H4)3-SO4Na(AES), C7F15 CO2Na(OBS), C16 H33 NMe3 Br(CTAB), C8H17-Ph(EO)10 OH(Triton) and C12 H25 (EO)9OH(AEO9) were also studied at 25 ℃. The composition of the surface adsorption layers, molecular interaction parameters and the molecule exchanging energy of surfactants of these mixtures were calculated according to the dimensional crystal model and the regular solution theory with the help of the curves γ～lg c. The relationship between activity and molecule exchanging energy of surfactants were emphatically discussed. The results show that gleditsin saponin mainly acts as a nonionic surfactant in aqueous solution but as a weak acid anionic surfactant when mixed with cationic CTAB. The synergism order of its binary mixtures is: GScationic>GSnonionic>GSanionic.

Key words: Gleditsin, Surfactant, Surface tension, Dimensional crystal model, Molecular interaction parameter, Molecule exchanging energy

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