阴离子表面活性剂和β-环糊精包结作用

The Association of Anionic Surfactants with β-cyclodextrin 

环糊精由于其特殊结构可与众多物质(客体分子)形成包结物,这种包结物在化学理论研究、化工工业、农业及医药等领域有广阔的应用前景[1、2],因而受到人们极大的关注.人们用电导法、核磁技术、表面张力法等研究了环糊精与阴离子表面活性剂的相互作用,但这些方法得出的结果很...

The association of a series of anionic surfactants (C n H 2 n +1 SO 3Na, n =5,8,10,12,14) with β cyclodextrin was studied by means of the isothermal titration calorimeter(ITC) at 298.15 K.For these type of inclusion complexes,the results agreed well with a 1:1 association model.Apparent values for the association constants,and changes in the standard molar Gibbs energies,enthalpies,entropies,were derived for the association process.The results indicated that the association of surfactants with β cyclodextrin are favorable by both enthalpy and entropy changes.The results also indicated that -Δ G increase steadily with an increasing of alkyl chain length of the surfactants.The results also demonstrated that the longer chain tail of surfactant,the greater the association constant with β cyclodextrin .