Ultrafiltration (UF) membranes composed of polyethersulfone (PES) hollow fiber were fabricated using PES-DMAc-PEG200 as the dope solution. Effects of air-gap distance and bore liquid composition on the flux and rejection of the prepared membrane were discussed. PES hollow fiber nanofiltration (NF) membranes were prepared via interfacial polymerization using PESUFB90 hollow fiber UF membrane as support, 0.5% (W/V) piperazine (PIP) and 0.5%(W/V) 2,2'-bis(1-hydroxyl-1-trifluoromethyl-2,2,2-triflutoethyl)-4,4'-methylenedianiline (BHTTM) as the water phase solution and 0.15%(W/V) trimesoyl chloride (TMC) as the organic phase solution. The performance of the PES support and NF membrane were characterized by SEM, AFM and dynamic contact angle measurement. The effects of operation pressure and salt concentration on the performance of NF membrane were investigated and the pore size of the NF membrane was obtained. In addition, the chlorine tolerant property of NF membrane was evaluated. The results show that the surface roughness of the PES support increases after interfacial polymerization, and the contact angle of the PES NF membrane is lower than that of the PES support. The effective pore size of the NF membrane is about 0.5 nm. Pure water flux and the rejection for sulfates of the NF membrane are 31.2 LMH and over 90%under 0.6 MPa, respectively. Moreover, the flux and rejection have no obvious change after treated with 1000 ppm NaClO for 18 h, which shows good chlorine tolerant of the PES NF membrane.%以聚醚砜(PES)-N,N-二甲基乙酰胺(DMAc)-PEG200为铸膜液体系，制备了PES中空纤维超滤膜，讨论了空气段间距和芯液组成对PES中空纤维超滤膜的影响。选用PESUFB90中空纤维超滤膜为基膜，以0.5%(w/v)哌嗪(PIP)和0.5%(w/v)2,2-二(1-羟基-1-三氟甲基-2,2,2-三氟乙基)-4,4-亚甲基双苯胺(BHTTM)为水相溶液，0.15%(w/v)均苯三甲酰氯(TMC)为油相溶液，采用界面聚合法制备了PES中空纤维复合纳滤膜，利用SEM、AFM和动态接触角等表征了PES基膜和纳滤膜的性能，讨论了操作压力和盐浓度对PES纳滤膜分离性能的影响，测定了纳滤膜的孔径，考察了膜的耐氯性能。结果表明，界面聚合后PES膜的表面粗糙度提高；PES基膜的接触角大于纳滤膜的接触角，纳滤膜亲水性较好；纳滤膜的有效孔径约为0.5 nm；0.6 MPa下，纯水通量为31.2 LMH，对硫酸盐的截留率在90%以上。此外，经1000 ppm NaClO处理18 h后，膜通量和截留无明显变化，显示良好的耐氯性能。
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