Properties and evaluation of amidoxime-based UHMWPE fibrous adsorbent for extraction of uranium from seawater  

作　　者：XING Zhe HU JiangTao WANG MouHua ZHANG WenLi LI ShiNeng GAO QianHong WU GuoZhong 

机构地区：[1]Shanghai Institute of Applied Physics,Chinese Academy of Sciences

出　　处：《Science China Chemistry》2013年第11期1504-1509,共6页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China (11275252);the Key Program of Strategically Advanced Science and Technology Project of the Chinese Academy of Sciences (XDA02040301);the Knowledge Innovation Program of Chinese Academy of Sciences

摘　　要：An amidoxime-based ultra-high molecular weight polyethylene （UHMWPE） fibrous adsorbent was successfully prepared by T-irradiation-induced graft copolymerization of acrylonitrile （AN） and acrylic acid （AA）, followed by amidoximation. The grafting of AN and AA on the UHMWPE fiber and the amidoximation of the grafted fiber were confirmed by Fourier transform infrared spectroscopy, scanning electron microscopy, and thermogravimetric analysis. The mechanical property of the original and modified UHMWPE fibers was compared by single-filament strength test. The adsorption property of the UHMWPE fibrous adsorbent was evaluated by adsorption test in uranyl nitrate solution and seawater. The surface of the modified UHMWPE fibers was covered by the grafting layer and became rough. The tensile strength of the amidoxime-based UHMWPE fibrous adsorbent was influenced by the absorbed dose and hydrochloric acid elution, but was independent of the grafting yield and amidoximation. The uranium adsorption amount of the amidoxime-based UHMWPE fibrous adsorbent after immersing in seawater for 42 days was 2.3 mg-U/g.An amidoxime-based ultra-high molecular weight polyethylene(UHMWPE)fibrous adsorbent was successfully prepared by γ-irradiation-induced graft copolymerization of acrylonitrile(AN)and acrylic acid(AA),followed by amidoximation.The grafting of AN and AA on the UHMWPE fiber and the amidoximation of the grafted fiber were confirmed by Fourier transform infrared spectroscopy,scanning electron microscopy,and thermogravimetric analysis.The mechanical property of the original and modified UHMWPE fibers was compared by single-filament strength test.The adsorption property of the UHMWPE fibrous adsorbent was evaluated by adsorption test in uranyl nitrate solution and seawater.The surface of the modified UHMWPE fibers was covered by the grafting layer and became rough.The tensile strength of the amidoxime-based UHMWPE fibrous adsorbent was influenced by the absorbed dose and hydrochloric acid elution,but was independent of the grafting yield and amidoximation.The uranium adsorption amount of the amidoxime-based UHMWPE fibrous adsorbent after immersing in seawater for 42 days was 2.3 mg-U/g.

关 键 词：ultra-high molecular weight polyethylene fiber ACRYLONITRILE acrylic acid radiation graft copolymerization amidoxi-mation uranium extraction 

分 类 号：TL212.5[核科学技术—核燃料循环与材料]