D-氨基酸改性HNTs/PAN杂化膜的制备及其超滤性能研究  

Preparation and ultrafiltration performance of HNTs/PAN hybrid membrane modified by D-amino acid

作　　者：臧鹏 刘峤 范茏 徐农 董强[1] 丁爱琴[1] ZANG Peng;LIU Qiao;FAN Long;XU Nong;DONG Qiang;DING Aiqin(School of Energy,Materials and Chemical Engineering,Hefei University,Hefei 230601,China)

机构地区：[1]合肥学院能源材料与化工学院,合肥230601

出　　处：《膜科学与技术》2021年第4期73-83,共11页Membrane Science and Technology

基　　金：安徽省教育厅重点项目(KJ2020A0669);安徽省重点研究和开发计划项目(201904a05020077);合肥学院人才基金(18-19RC15,18-19RC16,18-19RC19)。

摘　　要：为了提高聚丙烯腈(PAN)超滤膜的亲水性、水通量以及抗污染能力,以埃洛石纳米管(HNTs)为原料,通过聚多巴胺粘附D-氨基酸,制备埃洛石-聚多巴胺-D-氨基酸(HDD)复合材料.然后以聚丙烯腈(PAN)为基体、HDD为添加剂,制备了HDD/PAN杂化膜.借助XRD、TEM/SEM、FTIR、AFM、接触角等分析HDD/PAN杂化膜的微观形貌、化学结构、亲水性能和抗污染性能.结果表明,改性使得D-氨基酸成功附着在HNTs表面,提高了HDD与PAN的相容性,不但使膜具有较粗糙的皮层和更大的指状孔,还进一步提高了膜的超滤性能;其中,HDD添加量为质量分数5%时,杂化膜的水接触角最小,纯水通量、BSA溶液渗透通量以及BSA截留率分别高达1334.21、61.29 L/(m^(2)·h)和97.71%.A composite was prepared by dopamine adhering D-amino acid(DAA)to the outer surface of halloysite nanotubes(HNTs).The composite(HNTs-dopamine-D-amino acid,HDD)was added in situ by the method of non-solvent induced phase separation(NIPS)with polyacrylonitrile(PAN)as the matrix.The effects of HDD on the micromorphology,hydrophilic property,chemical structure and filtration performance of the HDD/PAN hybrid membrane were investigated by XRD,TEM,SEM,AFM and FTIR etc.The results showed that DAA was grafted on the surface of HNTs due to the adhesion of polydopamine.The DAA promoted dispersion of the HDD in the PAN matrix,increased surface roughness and vertical finger-like holes in the membrane.The additive(HDD)improved the hydrophilic property and antifouling performance of the hybrid membrane.It was found that with HDD content of 5%the membrane exhibited the lowest contact angle,the maximum pure water flux of 1334.21 L/(m^(2)·h),the BSA solution flux of 61.29 L/(m^(2)·h)and the BSA rejection as high as 97.71%.

关 键 词：聚丙烯腈 杂化膜 埃洛石纳米管 D-氨基酸 复合材料 

分 类 号：TQ325.8[化学工程—合成树脂塑料工业]