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Preparation of hydrophilic poly(vinyl butyral)hollow fiber membrane via thermally induced phase separation

机译：热诱导相分离法制备亲水性聚乙烯醇缩丁醛中空纤维膜

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摘要

Hydrophilic microporous hollow fiber membranes were prepared via thermally induced phase separation (TIPS).Poly(vinyl butyral)(PVB)and three kinds of polyethylene glycols (PEG)with the molecular weight of 200,400 and 600 were used as polymer and diluents.In all cases,liquid-liquid (L-L)phase separation occurred and asymmetric cellular structures with the smaller pores at the outer surface were obtained.The properties of membranes such as pore size,water permeability,solute rejection and intensity were investigated by changing molecular weight of PEG,concentration of PVB,composition of the bath and air gap distance.The smaller molecular weight of PEG,the more PEG in the bath and the shorter air gap distance resulted in the higher water permeability,the lower solute rejection property and the lower mechanical strength.
机译：通过热诱导相分离（TIPS）制备了亲水性微孔中空纤维膜，将聚乙烯醇缩丁醛（PVB）和三种分子量分别为200,400和600的聚乙二醇（PEG）用作聚合物和稀释剂。在这种情况下，发生了液-液相（LL）相分离，并获得了在外表面具有较小孔的不对称细胞结构。通过改变PEG的分子量，研究了膜的性质，如孔径，透水性，溶质截留率和强度。 ，PEG的浓度，浴液的组成和气隙距离。PEG的分子量越小，浴液中的PEG越多，气隙距离越短，则透水性越高，溶质排斥性能越低，机械强度越低。 。

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