采用涂覆法将PVA-CS混合溶液涂覆在PHBV静电纺纤维膜表面，考察不同PVA/CS溶液的配比对PVA-CS/PHBV复合膜性能的影响。PVA/CS涂覆液的粘度及用量将影响复合膜的结构形态。通过SEM对复合膜的表面形态进行表征，结果发现8 wt%PVA-2.5 wt%CS/8 wt%PHBV浓度下，PVA与CS溶液的体积比为5:5时的复合膜具有光滑均匀、平整致密的涂覆层，以及直径均匀且无串珠的纤维层。实验进一步对复合膜的过滤性能进行了测试，其纯水通量可达6.41×103 L/(m2?h)，对卵清蛋白的截留率达到89.94%，并且对铜、铅、镉等重金属离子及分散性染料都展现出良好的吸附性和过滤性。

PVA-CS/PHBV composite membranes were prepared by coating the PVA/CS solution on the surface of PHBV electrospun fibers. The properties of PVA-CS/PHBV composite membranes were investigated throught adjusting the volume ratio of PVA/CS. The viscosity and mass ratio of PVA/CS were the main factors that influenced on the morphology of the PVA-CS/PHBV composite membranes. SEM was used to observe the surface and cross-sectional morphology of these membranes. The uniform PHBV fibers as based layer could be obtained at 8 wt%. After adjusting the proper PVA/CS solutions, the smooth and fully CS-PVA coated layer was covered on the PHBV scaffold surface as 8 wt% PVA-2.5 wt%CS (PVA/CS, 5:5 ). As the results, the permeate flux and ovalbumin rejection of PVA-CS/PHBV composite membranes could reach 6.41×103 L/(m2?h) and 89.94%, respectivily. Further more, the composite membranes exhibited good adsorption and separation of heavy metal ion and disperse dyes

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