物理化学学报 >> 2010, Vol. 26 >> Issue (01): 73-78.doi: 10.3866/PKU.WHXB20100104

胶体及界面化学 上一篇    下一篇

聚(2-丙烯酰胺甲基-6-十二烷基硼酸二乙醇胺酯)与十二烷基苯磺酸钠混合溶液的表面活性

王海鹰, 柴立元, 吕春绪   

  1. 中南大学冶金科学与工程学院, 长沙 410083; 南京理工大学化工学院, 南京 210094
  • 收稿日期:2009-08-19 修回日期:2009-10-04 发布日期:2009-12-29
  • 通讯作者: 吕春绪 E-mail:lu-chunxu@163.com; haiyw25@163.com

Surface Activity of a Mixed Aqueous Solution of Poly(6-dodecyl-2-(acrylamidomethoxy)-1,3,6,2-dioxaza borocane) and Sodium Dodecylbenzene Sulfonate

WANG Hai-Ying, CHAI Li-Yuan, LV Chun-Xu   

  1. School of Metallurgical Science and Technology, Central South University, Changsha 410083, P. R. China; School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China
  • Received:2009-08-19 Revised:2009-10-04 Published:2009-12-29
  • Contact: LV Chun-Xu E-mail:lu-chunxu@163.com; haiyw25@163.com

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摘要：

聚(2-丙烯酰胺甲基-6-十二烷基硼酸二乙醇胺酯)(PADB)是一类两亲性聚硼酸酯. 本文通过表面张力法考察了不同相对分子质量的PADB水溶液的表面活性; 重点研究了PADB 与十二烷基苯磺酸钠(SDBS)在0.5 mol·L-1 NaCl溶液中的相互作用, 通过正规溶液理论, 计算PADB/SDBS混合体系的胶束化参数, 并与单体ADB/SDBS混合溶液体系进行了比较. 结果表明, PADB相对分子质量可达1.5×104-3.5×104, 随分子量增加, PADB水溶液中临界胶束浓度(cmc)增大, 但cmc时的表面张力(γcmc)维持在31 mN·m-1左右(298 K); 加入PADB后, SDBS溶液表面张力-浓度对数(γ-lgc)曲线出现两处转变点, 即c1和c2点, 但c1和c2皆小于纯SDBS溶液的临界胶束浓度(cmcSDBS), 即c1

关键词: 表面活性剂, 聚硼酸酯, 混合胶束, 相互作用, 胶束化参数

Abstract:

Poly(6-dodecyl-2-(acrylamidomethoxy)-1,3,6,2-dioxaza borocane) (PADB) is a novel amphiphilic polyborate. The surface activity of the polyborate PADB with various weight-average molecular weights (Mw) in an aqueous solution was measured by surface tension methods. Using regular solution theory, the interaction between PADB and sodium dodecylbenzene sulfonate (SDBS) in 0.5 mol·L-1 NaCl aqueous solution was studied and compared with the monomeric ADB/SDBS mixed system. Results showed that the Mw of the polyborate PADB ranges from 1.5×104 to 3.5×104. The increasing Mw of PADB raises their critical micelle concentration (cmc) in aqueous solutions, however, the surface tension at cmc (γcmc) can also reach about 31 mN·m-1 (298 K), which indicates excellent surface activity. By PADB addition, two transitions occurred in the curves of the surface tension (γ) vs logarithmconcentration of SDBS (lgcSDBS) and were labeled c1 and c2, respectively, and with c1

Key words: Surfactant, Polyborate, Mixed micelles, Interaction, Micellization parameter