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亚甲基蓝在涂覆有氯化物掺杂聚苯胺的聚乳酸和聚丙烯腈电纺纳米纤维膜上的吸附

Adsorption of methylene blue onto electrospun nanofibrous membranes of polylactic acid and polyacrylonitrile coated with chloride doped polyaniline.

作者信息

Mohammad Noor, Atassi Yomen

机构信息

Department of Applied Physics, Higher Institute for Applied Sciences and Technology, Damascus, Syria.

出版信息

Sci Rep. 2020 Aug 7;10(1):13412. doi: 10.1038/s41598-020-69825-y.

DOI:10.1038/s41598-020-69825-y
PMID:32770071
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7414855/
Abstract

This study presents the preparation of membranes of polylactic acid (PLLA), polyacrylonitrile (PAN) and their corresponding membranes coated with polyaniline (PANI) for the adsorption of methylene blue (MB). Scanning electron microscopy micrographs reveal that all the membranes exhibit nanofibrous morphology. The adsorption capacity and the removal efficiency of the membranes are studied as a function of (initial adsorbate concentration, pH of the medium, temperature, contact time and adsorbent dosage). Coated membranes with PANI showed better adsorption performance and their DC conductivities were correlated to MB concentrations. Adsorption isotherms have also been performed and the adsorption process has been tested according to Langmuir and Freundlich models. The regeneration and reuse of the prepared membranes to re-adsorb MB were also investigated. The enhancement in adsorption performance and reusability of PANI-coated membranes in comparison with non-coated ones are fully discussed.

摘要

本研究介绍了聚乳酸（PLLA）、聚丙烯腈（PAN）膜及其相应的涂覆有聚苯胺（PANI）的膜用于亚甲基蓝（MB）吸附的制备方法。扫描电子显微镜照片显示，所有膜均呈现纳米纤维形态。研究了膜的吸附容量和去除效率与（初始吸附质浓度、介质pH值、温度、接触时间和吸附剂用量）的关系。涂覆有PANI的膜表现出更好的吸附性能，其直流电导率与MB浓度相关。还进行了吸附等温线研究，并根据朗缪尔和弗伦德里希模型对吸附过程进行了测试。还研究了制备的膜对MB的再生和再吸附性能。充分讨论了PANI涂覆膜与未涂覆膜相比在吸附性能和可重复使用性方面的增强情况。

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