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Chem. J. Chinese Universities ›› 2002, Vol. 23 ›› Issue (10): 1915.

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Adsorption Equilibrium and Kinetics of Alkyl Polyglucoside on the Air/Water Interface

CHAI Jin-Ling1,2, XU Jun3, LI Gan-Zuo1, ZHANG Gao-Yong1, LI Ying1, CHEN Wen-Jun1   

  1. 1. Key Laboratory for Colloid and Interface Chemistry of State Education Ministry, Shandong University, Jinan 250100, China;
    2. Department of Chemistry, Shandong Normal University, Jinan 250014, China;
    3. Jinling Research Institute of Petrochemical Industry, Nanjing 210046, China
  • Received:2001-10-18 Online:2002-10-24 Published:2002-10-24

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Abstract: The air-solution equilibrium(γe) and dynamic surface tensions were measured by Wilhelmy method and maximum bubble pressure method(MBPM), respectively, of alkyl polyglucoside(APG) aqueous solution C9.6G1.3. The adsorption equilibrium and kinetics of APG on the air-solution interface were studied. The CMC of APG was determined to be 0.032 g/L. The above results show that at the start, the adsorption process is controlled by a diffusion step; Then it changes to a barrier control mechanism with a adsorption barrier between 4 and 7 kJ/mol. The effects of temperature, inorganic salts and alcohols on the adsorption equilibrium and kinetics were also discussed.

Key words: Dynamic surface tension, Adsorption equilibrium and kinetics, Alkyl polyglucoside

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