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摘要
为获得吸附性能强的改性壳聚糖,采用丙烯酰胺自由基引发侧链接枝方法对壳聚糖进行改性,考察了引发剂种类、引发剂和壳聚糖质量比、丙烯酰胺和壳聚糖质量比、反应温度、反应时间、搅拌速率以及析出溶剂对改性壳聚糖产物收率及吸附性能的影响,在此基础上开展了正交试验和后续的验证实验。结果表明:在氮气保护、改性剂丙烯酰胺与壳聚糖质量比为7、引发剂硝酸铈铵与壳聚糖质量比为0.1、反应温度45℃、反应时间150min、搅拌速率400r/min条件下、在丙酮中析出并真空干燥的改性壳聚糖对Co2+离子的吸附容量为16.42mg/g,较未改性前提高了约64.53%。
Abstract
Aim to improved the adsorption capability of chitosan (Cts),the synthesis parameters of acrylamide(AM) onto Cts in aqueous media by graft modification,the effect of ratio of initiator and Cts,the ratio of AM and Cts,reaction time and temperature,agitating speed and separate medium on the yield and adsorption capability of product were studied.Then the orthogonal test and verification test were conducted.The results showed that ammonium ceric nitrate used as the initiator was ideal,acetone was used as the separate medium.The optimum synthesis parameters were when under protected reaction by N2,m(ammonium ceric nitrate):m(Cts) was 0.1,m(AM):m(Cts) was 7,reaction time was 150min,reaction temperature was 45℃,agitating speed was 400r/min,and the products was separated in acetone dried in vacuum.The adsorption capacity of modified chitosan for Co2+ was 16.42mg/g,which was improved about 64.53% than that of unmodified chitosan.
关键词
壳聚糖
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丙烯酰胺
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接枝改性
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放射性废水
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吸附材料
Key words
chitosan
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acrylamide
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graft modification
/
radioactive water
/
adsorption material
用于处理放射性废水的丙烯酰胺改性壳聚糖制备工艺研究[J].
化工新型材料, 2019, 47(2): 202-206 DOI:
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