两性双子表面活性剂的合成及性能研究

doi:10.13218/j.cnki.csdc.2015.08.001

Abstract

Abstract: A kind of amphoteric Gemini surfactant was synthesized with diethylamine hydrochloride,epichlorohydrin,dodecyl dimethylamine and propanesultone as starting materials.The chemical structure of the synthesis product was characterized by IR and elemental analysis.The surface activity vs.concentration plot of the synthesis product was investigated by drop volume method,and the thermodynamic parameters were calculated based upon measurement of electrical conductivity of the synthesis product.Results showed that the critical micelle concentration (cmc) of the synthesis product is 8×10^-5 mol/L,and the surface tension at cmc minimizes to 38.57 mN/m.Moreover,with the increasing of temperature,the cmc of the synthesis product increases.The ΔHmθ of micellization process is negative,indicating that the process is an exothermic process.The ΔSmθ is positive,which suggests that the micellization process is an entropy-driven process.

Key words: amphoteric Gemini surfactant, surface activity, micellization thermodynamics

CLC Number:

TQ423.3

XIE Ying, LAI Lu. Synthesis and properties of amphoteric Gemini surfactant[J].China Surfactant Detergent & Cosmetics, 2015, 45(8): 421-424.

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Synthesis and properties of amphoteric Gemini surfactant

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