期刊论文

中文

应用化工

1671-3206

2022

51

9

2618-2624

10.3969/j.issn.1671-3206.2022.09.026

湖南省教育厅重点项目(19A421)。

本校为第一机构

采用自由基聚合法,先用丙烯酸(AA)改性壳聚糖(CS),再以N-异丙基丙烯酰胺(NIPA)和改性后的壳聚糖(AA-co-CS)为主链单体制备了AA-co-CS/NIPA温度敏感型水凝胶。研究了pH、温度、时间等对AA-co-CS/NIPA吸附U(Ⅵ)的影响。结果表明,在温度30 ℃,pH为6,初始U(Ⅵ)浓度10 mg/L时,AA-co-CS/NIPA改性水凝胶对U(Ⅵ)去除率达到95.59%,较CS/NIPA复合水凝胶的去除率提高8%,其吸附过程遵循准二级和Langmuir等温线模型。AA-co-CS/NIPA具有由温度刺激引起的良好的溶胀性能,经过5次吸附(20 ℃)-解吸(40 ℃)后,对U(Ⅵ)的去除率仍保持在78.39%。SEM结果表明,丙烯酸对壳聚糖的改性,增大了水凝胶的接触面积、增加了结合...

The free radical polymerization method was used.Acrylic acid(AA)was used to modify chitosan(CS),and then N-isopropylacrylamide(NIPA)and acrylic acid modified chitosan(AA-co-CS)were used to modify chitosan(CS).Preparation of AA-co-CS/NIPA temperature-sensitive hydrogel with main chain monomer.The experiment has studied the influence of pH,temperature,time,etc.on the adsorption of U(Ⅵ)by AA-co-CS/NIPA.The results show that when the temperature is 30℃,the pH is 6,and the initial U(Ⅵ)concentration is 10 mg/L,the removal rate of U(Ⅵ)by AA-co-CS/...