PPy/SMANa/PES导电复合膜的制备及其抗污性能

Preparation and antifouling performance of PPy/SMANa/PES conductive composite membranes

为改善聚醚砜(PES)膜的抗污性能,以苯乙烯-马来酸酐钠共聚物(SMANa)为添加剂,采用非溶剂诱导相分离法制备了SMANa/PES膜(简称SP膜)。然后采用气相聚合法,以FeCl_(3)作为氧化剂,在SP膜上沉积导电聚吡咯(PPy)层,制备了PPy/SMANa/PES导电复合膜(简称PSP膜)。采用FTIR、SEM和接触角测试仪表征SP膜、PSP膜的结构和形貌,采用超滤错流过滤法对两种膜的水通量和抗污性能进行了测试。考察了不同FeCl_(3)浓度、反应时间和反应温度对制备的PSP膜性能的影响。结果表明,当FeCl_(3)浓度0.8 mol/L、反应温度30℃、反应时间5 min时,制备的PSP膜表现出最佳的抗污性能,在0.1 MPa的过滤压力下,其纯水通量高达409.6 L/(m^(2)·h),为SP膜的83.8%,超声冲洗后的通量恢复率达到86.6%,比SP膜提高16.6%。

In order to improve the antifouling performance of polyethersulfone(PES)membrane,styrene maleic anhydride copolymer(SMANa)/PES membrane(SP membrane)were prepared by non-solvent induced phase separation method using SMANa as additives.Then,polypyrrole(PPy)/SMANa/PES conductive composite membrane(PSP membrane)was synthesized by deposition of PPy conductive layer on SP membrane via gas polymerization method with FeCl_(3)as oxidant.The structure and morphology of both SP and PSP membranes were characterized by FTIR,SEM and contact angle tester.The water flux and antifouling performance of two membranes were analyzed by ultrafiltration cross-flow filtration method,while the effects of FeCl_(3)concentration,reaction time and reaction temperature on the properties of PSP membranes were further investigated.The results showed that under the conditions of FeCl_(3)0.8 mol/L,temperature 30℃,and polymerization time 5 min,the obtained PSP membrane showed the best anti-fouling performance with a water flux of 409.6 L/(m^(2)·h)at 0.1 MPa,83.8%that of SP membrane.After ultrasonic irrigation,the flux recovery ratio reached up to 86.6%,improved by 16.6%compared with that of SP membrane.