Water pollution by organic contaminants has emerged as serious environmental and healthy crisis in many countries and attracts an increasing attention in recent years. Therefore, it is of great importance for developing highly-efficient adsorbents with fast adsorption rate and high adsorption capacity in wastewater remediation. In this study, we developed a facile approach for the fabrication of ultrafast adsorption nanofibrous membrane. The amphiphilic copolymer of methyl methacrylate and sodium styrene sulfonate was synthesized by simple free radical polymerization and further blended into PES to prepare functionalized PES nanofibrous membrane by electrospinning technology. Afterwards, just by being soaked in water and lyophilization, the hydrophilic and negatively-charged sulfuric sodium groups were migrated and concentrated on the membrane surface, and the as-prepared nanofibrous membrane exhibited high adsorption capacities of 625mg/g for the removal of methylene blue dyes. Moreover, it reached adsorption equilibrium within only 5 min, which were among the fastest of those previously reported nanofibrous membranes for cationic dyes. In addition, the as-prepared nanofibrous membrane also showed excellent performance of recyclability, dynamic filtration-purification, selective adsorption and smart filtration-separation for cationic and anionic dyes. Therefore, we envision that this study will not only provide a new avenue for fabricating ultrafast adsorption materials for water remediation, but also demonstrates its potential applications in the removal of organic dyes on a large scale.

Fabrication of the ultrafast adsorption nanofibrous membrane for water treatment by hydrophilic group surface migration

2019 Spring National Meeting

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