香兰素基非离子表面活性剂的动态表面张力与气/液界面吸附行为

doi:10.13218/j.cnki.csdc.2018.06.001

Abstract

Abstract: The dynamic surface tension of vanillin-based polyoxyethylene ethers (VAEO) was measured by the maximum bubble pressure method.The adsorption mechanism of surfactants at gas-liquid interface was studied by using Word-Tordai equation.The results show that when the mass concentration of VAEO is below critical micelle concentration (cmc),the adsorption of VAEO obeys the mechanisms of diffusion controlled adsorption and mixed diffusion-kinetic controlled adsorption,respectively,at the early stage and the later stage of adsorption.When the mass concentration is above cmc,the adsorption mechanism is mixed diffusion-kinetic controlled adsorption,where the micelles do not affect the adsorption behavior.The magnitude of diffusion coefficients of VAEO₁₀ and VAEO₂₀ are 10^-11 m²/s,which are lower than the NPEO₉s reported in literature.

Key words: vanillin-based polyoxyethylene ether, dynamic surface tension, gas-liquid interfacial adsorption, adsorption mechanism

CLC Number:

TQ423.2

ZHAI Gong-xun, DING Feng-mei, XING Zhi-qi, ZHOU Xiang. Dynamic surface tension and adsorption behavior of vanillin-based nonionic surfactants at gas-liquid interface[J].China Surfactant Detergent & Cosmetics, 2018, 48(6): 303-307.

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Dynamic surface tension and adsorption behavior of vanillin-based nonionic surfactants at gas-liquid interface

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