沙柳/聚乙烯醇复合凝胶的溶胀性能  

Swelling properties of PVA/SPP composite hydrogel

作　　者：杨兴林 伏广好 赵白云 刘泽 王丽[1,2] YANG Xing-lin;FU Guang-hao;ZHAO Bai-yun;LIU Ze;WANG Li(School of Materials Science and Art Design,Inner Mongolia Agricultural University,Hohhot 010018,China;Key Laboratory of Fibrosis and Energy Development and Utilization of Sandy Shrub Resources in Inner Mongolia Autonomous Region,Hohhot 010018,China;Inner Mongolia Fufeng Biotechnology Co.,Ltd.,Hohhot 010018,China)

机构地区：[1]内蒙古农业大学材料科学与艺术设计学院,内蒙古呼和浩特010018 [2]内蒙古自治区沙生灌木资源纤维化和能源化开发利用重点实验室,内蒙古呼和浩特010018 [3]内蒙古阜丰生物科技有限公司,内蒙古呼和浩特010018

出　　处：《应用化工》2021年第10期2761-2765,共5页Applied Chemical Industry

基　　金：内蒙古自然基金计划项目(2021MS02024);内蒙古科技厅计划项目(2019GG018)。

摘　　要：采用湿法纺丝合成沙柳木粉/聚乙烯醇复合水凝胶(SPS)。研究了溶胀时间、温度、pH、离子强度对SPS溶胀的影响以及水凝胶的溶胀动力学和吸附Hg^(2+)吸附动力学。采用SEM、FTIR、TG对SPS结构进行表征。结果表明,SPS形成了多孔网络结构,具有较好的热稳定性。pH为5,溶胀时间20 min时,溶胀度达到8.4 g/g。当溶胀温度为75℃,离子强度为0.02 mol/L时,溶胀度最大分别为21.8,12.5 g/g。SPS溶胀的初始阶段与Fickian扩散拟合较好;对整个阶段拟合,符合Schott模型。对Hg^(2+)的吸附符合准二级动力学模型,吸附容量为425.9 mg/g。Salix pasmmophila powder/polyvinyl alcohol composite hydrogel(SPS)was synthesized by wet spinning.The effects of swelling conditions(time,temperature,pH,ionic strength)on the swelling,the swelling kinetics of hydrogels and the adsorption kinetics of Hg^(2+) were studied.The structure of SPS was characterized by SEM,FTIR and TG.The result show that SPS has a porous network structure and has good thermal stability.When the pH was 5 and the swelling time was 20 min,the swelling degree reached 8.4 g/g.When the swelling temperature is 75℃and the ionic strength is 0.02 mol/L,the maximum swelling degree is 21.8,12.5 g/g,respectively.The initial stage of SPS swelling fits well with Fickian diffusion;for the whole stage,it accords with Schott model.The adsorption results are in accordance with the quasi-second-order kinetic model,the adsorption capacity is 425.9 mg/g.

关 键 词：沙柳木粉 聚乙烯醇 水凝胶 溶胀动力学 Hg2+吸附 

分 类 号：TQ351[化学工程] TQ317