辐射接枝制备聚丙烯纤维基海水提铀吸附剂

李荣; 庞利娟; 张明星; 王明磊; 张茂江; 刘西艳; 马红娟; 王谋华; 吴国忠

doi:10.11889/j.0253-3219.2017.hjs.40.050301

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辐射接枝制备聚丙烯纤维基海水提铀吸附剂

核化学、放射化学、放射性药物和核医学 | 更新时间：2021-05-19

- 辐射接枝制备聚丙烯纤维基海水提铀吸附剂
- Preparation of polypropylene fibrous adsorbents for extraction of uranium from seawater by radiation grafting method
- 核技术 2017年40卷第5期文章编号：050301
- 作者机构：
  
  1.中国科学院上海应用物理研究所嘉定园区上海 201800
  2.中国科学院大学北京 100049
  3.上海科技大学物质科学与技术学院上海 200031
- 作者简介：
  
  [ "李荣, 男, 1985年出生, 2014年于中国科学院上海应用物理研究所获博士学位, 主要从事高分子辐射改性研究", "LI Rong, male, born in 1985, graduated from Shanghai Institute of Applied Physics, Chinese Academy of Sciences with a doctoral degree in 2014, focusing on the study of radiation-induced modification of polymer" ]
  吴国忠, E-mail:wuguozhong@sinap.ac.cn WU Guozhong, E-mail: wuguozhong@sinap.ac.cn
- 基金信息：
  
  国家自然科学基金(No.11605275);国家自然科学基金(No.11675247)
- DOI：10.11889/j.0253-3219.2017.hjs.40.050301
  中图分类号： TL13
- 收稿日期：2017-03-09，
  
  修回日期：2017-03-24，
  
  纸质出版日期：2017-05-10
- 稿件说明：
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李荣, 庞利娟, 张明星, 等. 辐射接枝制备聚丙烯纤维基海水提铀吸附剂[J]. 核技术, 2017,40(5):050301

Rong LI, Lijuan PANG, Mingxing ZHANG, et al. Preparation of polypropylene fibrous adsorbents for extraction of uranium from seawater by radiation grafting method[J]. Nuclear techniques, 2017, 40(5): 050301
李荣, 庞利娟, 张明星, 等. 辐射接枝制备聚丙烯纤维基海水提铀吸附剂[J]. 核技术, 2017,40(5):050301 DOI： 10.11889/j.0253-3219.2017.hjs.40.050301.

Rong LI, Lijuan PANG, Mingxing ZHANG, et al. Preparation of polypropylene fibrous adsorbents for extraction of uranium from seawater by radiation grafting method[J]. Nuclear techniques, 2017, 40(5): 050301 DOI： 10.11889/j.0253-3219.2017.hjs.40.050301.

摘要

采用电子束预辐射接枝法将丙烯腈和丙烯酸接枝于聚丙烯（Polypropylene，PP）纤维上，并探讨了吸收剂量和反应温度对接枝率的影响。随后通过偕胺肟化反应制备出含偕胺肟基和羧基的PP纤维吸附剂。红外光谱数据表明，丙烯腈和丙烯酸成功接枝到PP纤维上，偕胺肟化反应将腈基转化为偕胺肟基，同时对改性前后PP纤维的表面形貌和热性能进行了表征。厦门海域真实海水吸附性能测试结果表明，所制备的PP纤维吸附剂铀吸附容量最高可达到0.81 mg·g

-1

（吸附时间为68 d），PP纤维吸附剂的铀吸附容量与其接枝率和偕胺肟基密度不呈正相关。

Abstract

Background

A recent estimate indicates that the land-based uranium sources are only able to last for about a century. Consequently

it is imperative to exploit new uranium resources with an economically feasible method. The uranium dissolved in seawater is about 4.5×10

much larger than the terrestrial sources

even though its concentration in seawater is low (about 3.3 μg·L

-1

). Hence

it is essential to develop techniques for mining uranium from seawater in order to satisfy the demand for uranium for nuclear power plants in the future.

Purpose

The aim of this work is grafting of poly (amidoxime) (PAO) and poly (acrylic acid) (PAA) onto polypropylene (PP) fibers to prepare the PP-

-P (AO-

-AA) fibrous adsorbents for recovery of uranium from seawater.

Methods

The PP-

-P (AO-

-AA) fibrous adsorbents were synthesized by electron beam pre-irradiation induced graft polymerization of AN and AA

followed by amidoximation. The surface morphology

chemical structure and thermal performance of the pristine and modified PP fibers were analyzed by attenuated total reflection Fourier transform infrared (ATR-FTIR)

scanning electron microscope (SEM) and thermogravimetric analysis (TGA)

respectively. The adsorption capacities of uranium and other metal ions by PP-

-P (AO-

-AA) fibrous adsorbents were evaluated after 68 d of immersion in natural seawater.

Results and Conclusion

The uranium adsorption capacity of PP-

-P (AO-

-AA) fibers reached 0.81 mg·g

-1

after 68 d of contact with natural seawater

and the uranium adsorption capacity did not show positive correlation with the degree of grafting and AO density of PP-

-P (AO-

-AA) fibers.

关键词

Keywords

references

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