Imaging Science and Photochemistry ›› 2018, Vol. 36 ›› Issue (3): 291-297.DOI: 10.7517/j.issn.1674-0475.2018.03.010

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The Effect of the Structures of Dicarboxylic Amino Acid-based Surfactants on the Surface and Wetting Properties and Aggregation Behavior

LU Xiang1, HAO Chunling2, JIANG Xiaoming1   

  1. 1. Department of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, Guizhou, P. R. China;
    2. College of Agriculture, Guizhou University, Guiyang 550025, Guizhou, P. R. China
  • Received:2017-12-02 Revised:2018-03-22 Online:2018-05-15 Published:2018-05-15

Abstract: Three amino acid-based surfactants, C12GlyNa, C12MalNa2, C12GluNa2, were prepared and their structures were identified by 1HNMR. Their surface properties and aggregation behavior were studied. Compared to C12GlyNa, C12MalNa2 shows higher values of cmc, γcmc and lower values of Гmax and pC20. The surfactant, C12GluNa2, exhibits lower Гmax and higher Amin compared to C12MalNa2. The maximum contact angle of C12GluNa2 solution on the calcite surface is higher than that of C12MalNa2 solution. The methylene group between two carboxyl groups shows great influences on the surface properties and the aggregation behavior.

Key words: amino acid-based surfactant, surface properties, aggregation, wetting properties, fluorescence