The effect of hydrophilic chain of surfactants fatty alcohol polyoxyethylene ether sodium sulphates (AEnS, n = 2, 3, 7) on surface properties and wetting properties was investigated by the measurement of equilibrium surface tension, dynamic surface tension and dynamic contact angle. The fatty alcohol polyoxyethylene ether sodium sulphates with different head group sizes were used. From the results of equilibrium surface tension measurements, we could obtain the critical micellisation concentration, adsorption efficiency, maximum surface excess concentration and Langmuir equilibrium adsorption constant at air/liquid interface. The dynamic surface tension results showed that the adsorption of aqueous solutions at the air/liquid interface follows a mixed-diffusion kinetic adsorption mechanism. In conclusion, for both studied surfactant, the longer the oxyethylene chains, the higher the maximum rate of surface tension reduction, the higher the diffusivity and wetting properties in terms of contact angle.

中文翻译：

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脂肪醇聚氧乙烯醚硫酸钠的氧乙烯基团对与润湿性能相关的平衡和动态表面张力的影响

表面活性剂对脂肪醇聚氧乙烯醚硫酸钠（AE）亲水链的影响nS, n = 2, 3, 7)对表面性质和润湿性的影响通过测量平衡表面张力、动态表面张力和动态接触角来研究。使用不同头基大小的脂肪醇聚氧乙烯醚硫酸钠。从平衡表面张力测量的结果，我们可以获得临界胶束浓度、吸附效率、最大表面过量浓度和空气/液体界面处的朗缪尔平衡吸附常数。动态表面张力结果表明，水溶液在气/液界面的吸附遵循混合扩散动力学吸附机制。总之，对于所研究的两种表面活性剂，氧化乙烯链越长，表面张力降低的最大速率越高，