Key Laboratory of Colloid and Interface Chemistry of State Education Ministry, Shandong University , 27 South Road of ShanDa, Jinan, Shandong 250100, P. R. China.
Langmuir. 2016 Aug 2;32(30):7503-11. doi: 10.1021/acs.langmuir.6b02269. Epub 2016 Jul 22.
In this paper, the detailed behaviors of all the molecules, especially the interfacial array behaviors of surfactants and diffusion behaviors of gas molecules, in foam systems with different gases (N2, O2, and CO2) being used as foaming agents were investigated by combining molecular dynamics simulation and experimental approaches for the purpose of interpreting how the molecular behaviors effect the properties of the foam and find out the key factors which fundamentally determine the foam stability. Sodium dodecyl sulfate SDS was used as the foam stabilizer. The foam decay and the drainage process were determined by Foamscan. A texture analyzer (TA) was utilized to measure the stiffness and viscoelasticity of the foam films. The experimental results agreed very well with the simulation results by which how the different gas components affect the interfacial behaviors of surfactant molecules and thereby bring influence on foam properties was described.
本文通过分子动力学模拟与实验相结合的方法，研究了以氮气（N2）、氧气（O2）和二氧化碳（CO2）等不同气体作为发泡剂的泡沫体系中所有分子的详细行为，特别是表面活性剂的界面排列行为和气体分子的扩散行为，旨在解释分子行为如何影响泡沫的性质，并找出从根本上决定泡沫稳定性的关键因素。十二烷基硫酸钠（SDS）用作泡沫稳定剂。泡沫衰减和排水过程由 Foamscan 确定。使用质构仪（TA）测量泡沫膜的刚性和粘弹性。实验结果与模拟结果非常吻合，描述了不同气体成分如何影响表面活性剂分子的界面行为，从而对泡沫性能产生影响。
