物理化学学报 >> 1999, Vol. 15 >> Issue (10): 895-899.doi: 10.3866/PKU.WHXB19991007

研究论文 上一篇    下一篇

高分子表面活性剂在固/液界面上的吸附形态

曹亚, 李惠林   

  1. 成都科技大学高分子研究所,高分子材料工程国家重点实验室,成都 610065
  • 收稿日期:1998-12-07 修回日期:1999-03-22 发布日期:1999-10-15
  • 通讯作者: 李惠林

Studies on Adsorption Conformation of Polymeric Suifactants at Solid /Liquid Interface

Cao Ya, Li Hui-Lin   

  1. Polymer Research Institute of Chengdu University of Science Technology,The State Key Laboratory of Polymer Materials Engineering,Chengdu 610065
  • Received:1998-12-07 Revised:1999-03-22 Published:1999-10-15
  • Contact: Li Hui-Lin

摘要:

采用紫外光谱、XPS研究了羧甲基纤维素型高分子表面活性剂在硅胶 /水界面上的吸附形态 ,结果表明随着高分子表面活性剂溶液浓度增大 ,分子在硅胶表面的吸附由单层逐渐变为多层 ,生成半胶束结构 .

关键词: 高分子表面活性剂, 羟甲基纤维素, 吸附形态, 固/液界面

Abstract:

 A novel series of polymeric surfactants were prepared by ultrasonic copolymerization of carboxy methyl cellulose (CMC) and alkyl poly(etheroxy) acrylate. The adsorption conformation of polymeric surfactants based on CMC at silica gel/water interface was studied by the adsorption isotherms, UV and XPS. The results show that the adsorptive amount goes up steadily with the increasing of copolymer concentration, and the hydrophilic chains, CMC and poly(etheroxy) segments, adsorb to the surface of silica gel. After the critic micellar concentration of polymeric surfactants, the hemi-micelles are formed through the hydrophobic interaction between molecules adsorbed on the solid surface and those in solution.

Key words: Polymer surfactant, Carboxy methyl cellulose, Adsorption conformation, Solid/liquid interface