粘度对表面活性剂液膜溶胀的影响

VISCOSITY EFFECTS ON THE SWELLING OF LIQUID SURFACTANT MEMBRANE

从实验和理论两方面探讨了粘度对液膜夹带溶胀及渗透溶胀的影响.当乳状液粘度超过50mPa·s时,夹带溶胀随乳状液粘度的增加而降低.膜相粘度的增加会导致渗透溶胀的减少.并提出了各粘度区估算溶胀率的数学模型,且模型值和实验数据吻合良好.

Viscosity effects on water entrainment into W/O emulsion drops and permeation-swelling in a (W/O)/W system were studied theoretically and experimentally. The entrainment swelling was found to decrease with increasing emulsion viscosity when this viscosity exceeded 50-100 mPa·a, whereas there was no effect below that range. The dependence on the emulsion viscosity is 0.3 power in moderate-viscosity region(100-600mPa·s)and 0.6 power in high-viscosity region. The permeation-swelling rate decreased as the membrane-phase viscosity increased because of decreasing diffusion coefficient of water in the membrane phase. The mathematical models for estimating the swelling ratio in various viscosity regions was proposed and the predicted values agreed well with the experimental.