Acta Phys. -Chim. Sin. ›› 2002, Vol. 18 ›› Issue (05): 455-458.doi: 10.3866/PKU.WHXB20020515

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Influence of Surfactants on Solution Viscosity of Cellulosic Graft Copolymer

Zhang Jian;Xie Xu-Ming;Li Zhuo-Mei;Zhang Li-Ming;Li Jian;Luo Ping-Ya   

  1. Institute of Polymer Science and Engineering, Tsinghua University, Beijing 100084;Institute of Polymer Science, Zhongshan University, Guangzhou 510275;Southwest Petroleum Institute, Nanchong 637001
  • Received:2001-09-25 Revised:2001-12-13 Published:2002-05-15
  • Contact: Zhang Jian

Abstract: Influence of different surfactants,such as anionic sodium dodecylsulfate(SDS),cationic cetyltrimethylammonium bromide(CTAB), and nonionic octylphenylpoly(ethylene glycol)(OP)upon water solution viscosity(η) of the hydrophobicallymodified watersoluble amphoteric cellulosic graft copolymer(CGAO) of carboxymethyl cellulose(CMC) grafted with acrylamide(AM) and (methacryloxyethyl)dimethyloctylammonium bromide(ADMOAB) has been investigated. It was found that the maximum(ηmax) of solution viscosity of CGAO was obtained in the neighborhood of the critical micelle concentration of SDS and OP at 10 s-1 of shear rate and 25 ℃. ηmax in the presence of SDS was much larger than that in the presence of OP; and the higher the content of ADMOAB of hydrophobe in CGAO, the larger ηmax was. In the case of CTAB, η continuously decreased with the increment of CTAB concentration. However, for nonhydrophobicallymodified graft copolymer(CGA) of CMC with AM, its η reduced with the increasing concentration of SDS or CTAB, but η was almost independent of OP. And the hydrophobic association between surfactants and CGAO was demonstrated by the retention time measured through gel permeation chromatography.

Key words: Surfactant, Cellulosic graft copolymer, Viscosity, Hydrophobic association, Retention time