Terpolymer hydrogel and preparation method and purpose thereof
A terpolymer and hydrogel technology, applied in chemical instruments and methods, alkali metal compounds, and other chemical processes, to achieve the effects of low cost, high material utilization, and large specific surface area
Active Publication Date: 2017-04-26
LANZHOU UNIVERSITY
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[0005] The preparation method of terpolymer hydrogel of the present invention is: with K 2 S 2 o 8 -NaHSO 3 As the initiator, using acrylonitrile, acrylic acid and β-cyclodextrin as raw materials, the optimal experimental conditions for the binary graft copolymerization of acrylonitrile and β-cyclodextrin were explored by emulsion polymerization, and then the synthesized propylene Nitrile-acrylic acid-β-cyclodextrin (AN / AA / β-CD) functionalized terpolymer hydrogel was used as an adsorbent to overcome the material to a certain extent while maintaining its excellent enrichment and separation ability. A single deficiency, expanding its scope of application, and providing data support for the realization of green treatment of radioactive wastewater
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[0021] The present invention will be further described in detail below in conjunction with specific embodiments.
[0022] One, the preparation of material of the present invention
[0023] The terpolymer hydrogel of the present invention that can enrich and separate uranium in the aqueous solution is K 2 S 2 o 8 -NaHSO 3 As the initiator, acrylonitrile, acrylic acid and β-cyclodextrin are used as raw materials, and the product of binary graft copolymerization of acrylonitrile and β-cyclodextrin is prepared by emulsion polymerization, and then the functionalized terpolymer is further synthesized Hydrogel acrylonitrile-acrylic acid-β-cyclodextrin (AN / AA / β-CD). The specific preparation method is as follows:
[0024] 1) Add 3.2g of β-cyclodextrin into a 100mL three-necked flask, then add 100mL of 5% (mass fraction) acetic acid solution, and stir at 60°C for 5min to completely dissolve the β-cyclodextrin;
[0025] 2) Then add 0.1040g sodium bisulfite to make NaHSO 3 The conc...
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The invention relates to a terpolymer hydrogel capable of enriching and separating uranium in aqueous solution and a preparation method thereof. The terpolymer hydrogel takes K2S2O8-NaHSO3 as an initiator, takes acrylonitrile, acrylic acid and beta-cyclodextrin as raw materials, an emulsion polymerisation method is used for preparing a product through a binary grafting copolymerization reaction of acrylonitrile and beta-cyclodextrin, and the functional terpolymer hydrogel acrylonitrile-acrylic acid-beta-cyclodextrin (AN / AA / beta-CD) can be synthesized. The terpolymer hydrogel has the advantages that the raw materials are easily available, the terpolymer hydrogel is a uranium separating agent with good performance, adsorption rate is high, the preparation method is simple and easy to carry out, desorption condition is mild, no massive strong acid as well as poisonous and harmful substances can be discharged during a whole process, no secondary pollutant is generated, and the novel functional terpolymer hydrogel is environmentally friendly, and can be recycled.
Description
technical field [0001] The invention relates to a terpolymer hydrogel, a preparation method and application thereof. Specifically, the present invention relates to a terpolymer hydrogel capable of enriching uranium in a separated aqueous solution, its preparation method and application. Background technique [0002] Uranium and its compounds are one of the important raw materials in the nuclear industry, and are the basis for nuclear power applications and military nuclear weapons. However, in the process of mass production and utilization of uranium resources, because uranium is a radioactive element, it will release alpha rays. Therefore, there is a serious threat to human health and the natural ecological environment. Therefore, the sustainable development of uranium resources is very necessary. How to reasonably and effectively remove and recover the pollution of uranium nuclides in radioactive wastewater has also been paid more and more attention. At present, common me...
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IPC IPC(8): C08F251/00C08F220/06C08F220/46B01J20/26B01J20/28G21F9/12
CPCB01J20/264B01J20/28047C08F251/00G21F9/12C08F220/06C08F220/46
Inventor 刘同环杨柳牛智伟段国建王睿儒毕蕾吴王锁
Owner LANZHOU UNIVERSITY