as non-solvent has been attracting attentions in the formation of polymer microporous membrane.Advantages of this method are high mass transport coefficient
rapid drying of the polymer membrane without collapse of the structure
easy recovery of solvent and recycling of CO
2
and low toxicity of CO
2
.The thermodynamics and kinetics theory in the preparation process were presented.The studies on polystyrene
polyacrylonitrile
polyethersulfone microporous membrane etc were mainly introduced.