The Effect of Mixed Micelle of Surfactant on the Alkaline Hydrolysis of Esters

Chem. J. Chinese Universities ›› 1995, Vol. 16 ›› Issue (10): 1605.

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The Effect of Mixed Micelle of Surfactant on the Alkaline Hydrolysis of Esters

ZENG Xian-Cheng¹, LI Qi-Lin¹, CHEN Min-zhu¹, WANG Qian¹, QIN Zi-Ming¹, Zou Ping¹, LI Gan-Zuo², HUANG Qi-Zhong³

1. Department of Chemistry, Sichuan University, Chengdu, 610064;
2. Chem. College, Shandong Univ.;
3. Chem.Dept., Sichuan Normal Univ.

Received:1994-11-19 Revised:1995-03-29 Online:1995-10-24 Published:1995-10-24

Abstract

Abstract: The alkaline hydrolyses of aromatic and normal aliphatic acid esters have been studied at 25℃ in mixed micelles of surfactants(SDS-Brij 35,DTAB-Brij 35, TTABBrij 35, CTAB-Brij 35, CTAB-Triton X-100, SDS-Triton X-100)with spectrophotometry and the method of thermokinetics in this paper. The critical micellar concentrations of the corresponding systems have been measured with spectrophotometry. k_1min micellar psuedophase has been calculated.The ratios of k_1mto k_1wfor all mixed micellar systems investigated are less than 1.The alkaline hydrolyses of the esters are inhibited by them. The inhibtion of the mixed micellar systems is stronger than that of corresponding single micellar systems because micropolarity of compact Stern layer of mixed micelles is lower.

Key words: Mixed micelle of surfactants, Alkaline hydrolysis of ester, Inhibition

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ZENG Xian-Cheng, LI Qi-Lin, CHEN Min-zhu, WANG Qian, QIN Zi-Ming, Zou Ping, LI Gan-Zuo, HUANG Qi-Zhong. The Effect of Mixed Micelle of Surfactant on the Alkaline Hydrolysis of Esters[J]. Chem. J. Chinese Universities, 1995, 16(10): 1605.

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The Effect of Mixed Micelle of Surfactant on the Alkaline Hydrolysis of Esters

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