Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (01): 73-78.doi: 10.3866/PKU.WHXB20100104

• COLLOID AND INTERFACE CHEMISTRY • Previous Articles     Next Articles

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

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

MSC2000: 

  • O648