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Citation: Li Xue-Gang, Zhao Guo-Xi. Molecular Interaction and Phase-separation in the Aqueous Solution of Anioniccationic Sufractant Mixture[J]. Acta Physico-Chimica Sinica, ;1995, 11(05): 450-453. doi: 10.3866/PKU.WHXB19950514 shu

Molecular Interaction and Phase-separation in the Aqueous Solution of Anioniccationic Sufractant Mixture

Li Xue-Gang ,
Zhao Guo-Xi

1.
Chemistry Department of Peking University,Beijing 100871

Received Date: 28 March 1994
Available Online: 15 May 1995

The interactions between C8H17(OC2H4)nSO4Na (C8EnS; n=0, 1, 3) and C8H17NC6H5Br(C8Py), C8EnS and CmH2m+2NC5H5Br (CmPy; m=10, 12, 14, 16), t-C8H17C6H4(OC2H4)9.8SO4Na (C8φE9.8S) and CmPy in micelles have been studied by surface tension method. The partial ternary "phase diagram" of C8EnS-C8Py-H2O and C8EnS-C12Py-H2O systems have been obtained. The results show that with the increase of n, the interaction between C8EnS and C8Py decreases and the stability of aqueous solution of C8EnS-C8Py increases. With the increase of m, the interaction between C8E3S and CmPy increases and the stability of aqueous solution of C8E3S-CmPy decreases. The interaction between C8φE9.8S and CmPy is strong while the aqueous solution of C8φE9.8S- CmPy is still very stable.
- Cationic-anionic surfactant,
- Molecular interaction,
- Phase-separation
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