Abstract
A novel, environmental friendly approach was introduced to fabricate polyvinylidene fluoride hollow fiber membranes with interconnected sponge-like structure and high permeability for membrane distillation. The effect of different parameters on the morphologies and properties of the membranes were investigated. The pore size and porosity were in the range of 0.20–0.40μm and 61.07–79.36% respectively. The maximum tensile strength was 6.941MPa. The nitrogen flux under 0.2MPa and pure water flux were as high as 44L/(m2s) and 4290L/(m2atmh) respectively. The direct contact membrane distillation flux reached 77.6kg/(m2h). The membranes prepared by this method meet the requirements of direct contact membrane distillation.
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