Journal
ACTA PHYSICO-CHIMICA SINICA
Volume 23, Issue 12, Pages 1881-1885Publisher
PEKING UNIV PRESS
DOI: 10.3866/PKU.WHXB20071210
Keywords
sodium alkyl benzene sulfonate; surface; interface; dilational modulus
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The dilational theological properties of a pair of structural isomers: sodium 2-propyl-4,5-dihexyl benzene sulfonate (366) and sodium 2,5-dipropyl-4-nonyl benzene sulfonate(393) at the air/water and deeane/water interfaces were investigated by drop shape analysis method. The influences of concentration on dilational modulus were expounded. The experimental results showed that the 5-alkyl played an important role in the surface dilational modulus, while the dimension of surfactant molecule dominated the interfacial dilatinal modulus.
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