Aqueous Solution Blow Spinning of Seawater‐Stable Polyamidoxime Nanofibers from Water‐Soluble Precursor for Uranium Extraction from Seawater,Small Methods

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Aqueous Solution Blow Spinning of Seawater‐Stable Polyamidoxime Nanofibers from Water‐Soluble Precursor for Uranium Extraction from Seawater
Small Methods ( IF 10.7 ) Pub Date : 2020-11-12 , DOI: 10.1002/smtd.202000558
Xin Xu _{1,

2} , Yaru Yue ₂ , Dong Cai ₂ , Jianan Song ₃ , Caina Han ₂ , Zhongjie Liu ₂ , Dong Wang _{1,

2} , Juanxiu Xiao ₂ , Hui Wu ₃

Affiliation

Polyamidoxime (PAO)‐based fibers are recognized as one of the most promising adsorbents for industrial‐scale extraction of uranium from seawater. The spinning of PAO is usually processed in environmentally unfriendly organic solvents, which cause serious environmental and cost concerns in industrial‐scale manufacturing. In this work, an aqueous solution blow spinning (ASBS) strategy is developed for large‐scale fabrication of seawater‐stable polyamidoxime/alginate nanofibers (PAO/Alg NFs) from water‐soluble PAO precursor solution. The as‐spun PAO/Alg NFs are ready to be used for uranium adsorption after simple immersion in calcium chloride solution for crosslinking. The 3D porous architecture, flexibility, and strength of nanofibers are well maintained as the inevitable shrinkage and degeneration accompanied by traditional “alkaline‐heat activation” post treatment are completely avoided. A high adsorption capacity of 892.77 and 8.42 mg‐U g⁻¹ NFs is achieved in uranium spiked seawater and 8 tons of nonspiked natural seawater, respectively. Taking advantage of the simplicity, low cost, and industrially scalable features, this novel ASBS approach shows great potential for industrial‐scale production of PAO‐based nanofiber adsorbent with high capacity and good mechanical strength for uranium recovery from natural seawater and industrial wastewater.

中文翻译：

水溶性前驱体用于海水中铀萃取的海水稳定的聚酰胺B肟纳米纤维的水溶液吹纺。

基于聚酰胺ami肟（PAO）的纤维被公认为是从海水中工业规模提取铀的最有希望的吸附剂之一。PAO的纺丝通常在对环境不利的有机溶剂中进行处理，这会在工业规模制造中引起严重的环境和成本问题。在这项工作中，开发了一种水溶液吹塑（ASBS）策略，用于从水溶性PAO前体溶液大规模制造海水稳定的聚酰胺型肟/藻酸盐纳米纤维（PAO / Alg NFs）。简单浸入氯化钙溶液中进行交联后，即用型PAO / Alg NFs即可用于铀吸附。3D多孔架构，灵活性，纳米纤维的强度得到了很好的维护，因为完全避免了传统的“碱性热活化”后处理不可避免的收缩和变性。892.77和8.42 mg‐U g的高吸附容量在铀加标海水和8吨非加标天然海水中分别达到^-1 NFs。利用这种简单，低成本和可在工业上扩展的特性，这种新颖的ASBS方法在工业规模生产具有高容量和良好机械强度的PAO基纳米纤维吸附剂方面具有巨大潜力，可以从天然海水和工业废水中回收铀。

更新日期：2020-12-03

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