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Citation: Li Wailang, Pan Chuanbin, Gu Tiren. THE MOLECULAR ORIENTATION OF POLYETHER-TYPE SURFACTANTS AT THE INTERFACES
Ⅰ. THE SURFACE FILMS OF TRITON X-100 AND TRITON X-305[J]. Acta Physico-Chimica Sinica, ;1986, 2(04): 297-301. doi: 10.3866/PKU.WHXB19860406 shu

THE MOLECULAR ORIENTATION OF POLYETHER-TYPE SURFACTANTS AT THE INTERFACES
Ⅰ. THE SURFACE FILMS OF TRITON X-100 AND TRITON X-305

1.
Institute of Physical Chemistry, Peking University

Received Date: 6 July 1985
Available Online: 15 August 1986

The film pressure vs. area curves of the surface films of Triton X-100 and Triton X-305 have been determined on a 46.6% NANO_3 substrates at 25 ℃. The results suggest that the area per molecule on the surface at constant film pressure is a linear function of ethylene oxide chain length. It is proposed that the amphipathic molecule orients at the air/water interface with the hydrophobic group above the interface and the ethylene oxide chain partly lies in the interface and partly penetrates the water phase. Although the fraction of the number of ethylene oxide unit lain in the interface, f, increase progressively with film pressure, is independent of n, the ethylene oxide chain length. With this model, the experimental results can be explained.
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THE MOLECULAR ORIENTATION OF POLYETHER-TYPE SURFACTANTS AT THE INTERFACES Ⅰ. THE SURFACE FILMS OF TRITON X-100 AND TRITON X-305

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通讯作者: 陈斌, bchen63@163.com

THE MOLECULAR ORIENTATION OF POLYETHER-TYPE SURFACTANTS AT THE INTERFACES
Ⅰ. THE SURFACE FILMS OF TRITON X-100 AND TRITON X-305