Preparation of Amidoximated Ultrahigh Molecular Weight Polyethylene Fiber by Radiation Grafting and Uranium Adsorption Test
Preparation of Amidoximated Ultrahigh Molecular Weight Polyethylene Fiber by Radiation Grafting and Uranium Adsorption Test
复制标题
辐射接枝制备偕胺肟化超高分子量聚乙烯纤维及铀吸附试验
DOI：
10.1021/acs.iecr.5b03175
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发表时间：
2016-04-20
影响因子：
4.2
通讯作者：
Wu, Guozhong
中科院分区：
文献类型：
--
作者：
Hu, Jiangtao;Ma, Hongjuan;Wu, Guozhong
采用预辐照引发丙烯腈（AN）和丙烯酸（AA）在超高分子量聚乙烯（UHMWPE）纤维上接枝共聚，然后进行偕胺肟化反应，制备了一种含偕胺肟（AO）基团的超高分子量UHMWPE纤维吸附剂（AO-UHMWPE）。通过傅里叶变换红外光谱、热重分析和拉伸试验分别评价了其化学结构、热稳定性和机械强度。通过对331 ppb铀溶液的静态吸附、模拟海水和天然海水的流动吸附实验，研究了AO-UHMWPE纤维对铀的吸附行为。发现吸附条件（即，接触时间和方式、温度和铀酰离子初始浓度）显著影响结合到AO-UHMWPE纤维上的铀酰离子的量。在有大量干扰离子存在的情况下，批量吸附实验中铀的吸附量为4. 54 g-U/kg-ad。
An ultrahigh molecular weight polyethylene (UHMWPE) fibrous adsorbent with amidoxime (AO) groups, denoted as AO-UHMWPE, was prepared by preirradiation-induced graft copolymerization of acrylonitrile (AN) and acrylic acid (AA) on UHMWPE fibers, followed by amidoximation. The chemical structure, thermal stability, and mechanical strength were evaluated by means of Fourier transform infrared spectrometry, thermogravimetric analysis, and tensile tests, respectively. The adsorption behaviors of the AO-UHMWPE fiber were studied by batch adsorption in 331 ppb uranium solution, and flow-though adsorption experiments in simulated and natural seawater. It was found that the adsorption conditions (i.e., contact time and manner, temperature, and uranyl ion initial concentration) significantly influence the amount of uranyl ions binding to the AO-UHMWPE fibers. The adsorption of uranium in the batch adsorption experiment was 4.54 g-U/kg-ad in the presence of massive amounts of interference ions.