Cocamidopropyl betaine (CAPB) and poly(acrylamide) (PAM) were used for the formation of an ultra-dry CO₂-in-water (C/W) foam in which the water volume fraction could be as low as 5 %. At water contents between 10 % and 5 % v/v, the C/W foam formed with CAPB and nonionic PAM (NPAM) showed four times longer stabilization times than that formed with only CAPB. The synergistic effect of surfactants and polymers on the viscosity, interfacial density and thickness was also analysed using dissipative particle dynamics (DPD) simulations. NPAM could assemble at the C/W interface, act as a surfactant and stretch between surfactants, which enhanced the density of the surfactant at the interface, prevented the aggregation between the surfactants and improved the foam stability. For the CO₂/water/CAPB system, the addition of NPAM with a shorter chain length was more conducive to improve the stability of the C/W foam.

使用椰油酰胺基丙基甜菜碱（CAPB）和聚丙烯酰胺（PAM）形成超干燥的CO ₂水包水（C / W）泡沫，其中水体积分数可低至5％。在水含量介于10％和5％v / v之间时，CAPB和非离子型PAM（NPAM）形成的C / W泡沫的稳定时间是仅CAPB形成的稳定时间的四倍。还使用耗散粒子动力学（DPD）模拟分析了表面活性剂和聚合物对粘度，界面密度和厚度的协同作用。NPAM可以在C / W界面处组装，充当表面活性剂并在表面活性剂之间拉伸，从而提高了界面活性剂的密度，防止了表面活性剂之间的聚集并改善了泡沫稳定性。对于CO ₂/ water / CAPB系统中，链长度较短的NPAM的添加更有利于提高C / W泡沫的稳定性。