膜科学与技术

D-氨基酸改性HNTs/PAN杂化膜的制备及其超滤性能研究

作者：臧鹏，刘峤，范茏，徐农，董强，丁爱琴

单位：合肥学院能源材料与化工学院，合肥 230601

关键词：聚丙烯腈、杂化膜、埃洛石纳米管、D-氨基酸、复合材料

出版年,卷(期):页码： 2021,41(4):73-83

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，通过聚多巴胺黏附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、接触角等仪器和测量方式，研究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5 wt%时，其水接触角最小，且纯水通量、BSA溶液过滤通量以及BSA截留率分别高达1334.21L/（m2·h）、61.29 L/（m2·h）、97.71%。

A composite was prepared by dopamine adhering D-amino acid 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 D-amino acid (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 anti-fouling performance of the hybrid membrane. It was found that with HDD content of 5 wt% the membrane exhibited the lowest contact angle, the maximum pure water flux of 1334.21L/(m2·h), the BSA solution flux of 61.29 L/( m2·h) and the BSA rejection as high as 97.71%.

臧鹏（1997-），男，江苏宿迁人，硕士生，研究方向为膜材料科学与技术，E-mail：1370384303@qq.com

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