在4,4′-二氨基二苯醚(ODA)与二苯醚四甲酸二酐(ODPA)中加入十二烷基硫酸钠(SDS)进行亲水改性,通过静电纺丝制备了SDS含量不同的ODA-ODPA/SDS纳米纤维膜。采用X射线光电子能谱仪、视频接触角测量仪对纳米纤维膜的元素组成、水接触角以及石油醚/水乳液分离性能进行了分析和测试。结果表明:ODA-ODPA/SDS纳米纤维膜的亲水性逐渐提高,水接触角从108°降至0°,由疏水膜转变为亲水膜;纳米纤维膜对石油醚/水乳液分离效果良好,膜平均通量最大为143.41L/(m2·h),最大分离效率达70％,循环使用10次后,分离效率仍大于65%。
Sodium dodecyl sulfate (SDS) was added to 4,4′-diaminodiphenyl ether and diphenyl ether tetracarboxylic acid dianhydride (ODA-ODPA) for hydrophilic modification,and ODA-ODPA/SDS nanofiber membranes with varying SDS contents were prepared by electrospinning.The element composition,water contact angles and the separation performance of the nanofiber membranes were analyzed and tested by X-ray photoelectron spectrometer and video contact angle meter.The results showed that the hydrophilicity of the nanofiber membrane was gradually increased,and the water contact angle decreased from 108° to 0°,changing from hydrophobic membrane to hydrophilic membrane.The nanofiber membrane had a good effect on the separation of petroleum ether/water emulsion.The maximum value of the average membrane flux was 143.41L/(m2·h),and the maximum separation efficiency was 70%.After 10 cycles of recycling,the separation efficiency was still greater than 65%.
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