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author:

Du, ZY (Du, ZY.) [1] | You, Y (You, Y.) [2] (Scholars:游毅) | Jiang, R (Jiang, R.) [3] (Scholars:姜蓉) | Huang, W (Huang, W.) [4] | Zheng, O (Zheng, O.) [5] (Scholars:郑欧) | Huang, CC (Huang, CC.) [6] (Scholars:黄长沧) | Zhao, JX (Zhao, JX.) [7] (Scholars:赵剑曦)

Indexed by:

SCIE PKU CSCD

Abstract:

The sodium carboxylate Gemini surfactants containing a rho-phendioxy spacer, Cm+1-Ph-Cm+1(2cbx) . 2Na (cbx means carboxylate, m + 19,11,13), were synthesized and their micellization in aqueous solution was studied by using conductivity measurements. The critical micelle concentration (cme) of Cm+1-Ph-Cm+1(2cbx) . 2Na was found to be considerably low in aqueous solution. The regression equations of cmc-T was shown as cmc = 8.57 x 10(-4)T(2) - 0.499T + 78.2 (m + 1 = 9), cmc = 2.86 x 10(-5)T(2) - 0.0146T + 2.90(m + 1 = 11) and cmc = 1. 43 x 10(-5)T(2) - 0.00730T + 1.28(m + 1 = 13), respectively. The variation of lncmc with (m+1) for all three surfactants obeyed an unified regression equation as Incmc = 0.0323 (m + 1)(2) - 1.00 (m + 1) + 7.16. The thermodynamic functions calculated indicate that the micellization is an entropy-driven process and has a character of enthalpy-entropy compensation. In all the systems examined the micelle formed by (m + 1) = 11 is the most stable.

Keyword:

micellization p-phendioxy spacer sodium carboxylate Gemini surfactant synthesis

Community:

  • [ 1 ] Fuzhou Univ, Dept Chem, Fuzhou 350002, Peoples R China

Reprint 's Address:

  • 赵剑曦

    [Zhao, JX]Fuzhou Univ, Dept Chem, Fuzhou 350002, Peoples R China

Email:

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Source :

CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE

ISSN: 0251-0790

CN: 22-1131/O6

Year: 2003

Issue: 11

Volume: 24

Page: 2056-2059

0 . 7 9 6

JCR@2003

0 . 7 0 0

JCR@2023

ESI Discipline: CHEMISTRY;

JCR Journal Grade:2

Cited Count:

WoS CC Cited Count: 10

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 2

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