高通量亲水聚砜超细纤维膜的制备与性能

摘要

采用戊二醛交联壳聚糖溶液浸轧处理经氧气等离子体处理后的静电纺聚砜超细纤维膜,研究戊二醛体积百分比对处理后纤维膜的孔隙结构、亲水性、力学性能和纯水通量的影响.结果表明:经戊二醛交联壳聚糖溶液浸轧处理后,纤维膜的孔径明显变小,亲水性和拉伸力学性能得到显著改善.最佳戊二醛体积百分比为0.40%,此时处理后纤维膜仍具有发达的孔隙结构,平均孔径为2.62μm,力学性能显著增强,纤维膜由疏水转变为亲水,且纯水通量为(1624.7±189.5) L/(m2·h).%In this paper, the effects of volume percent of glutaraldehyde in chitosan solution on porous structure, hydrophily, mechanical properties and pure water flux of PSF superfine fibrous membrane which was pretreated by oxygen plasma, and then padded with cross-linked chitosan solution.Results show that the pore size decreases obviously, but the hydrophilicity and pure water flux improve significantly after the treatment.The optimum volume percent of glutaraldehyde is 0.40%.In this condition, the treated membrane still has high porous structure, and the average pore diameter is 2.62μm.The mechanical properties improve obviously.The membranes also change from hydrophobic property into hydrophilic property.The pure water flux is (1 624.7±189.5) L/(m2·h).