不同细度脱脂紫茎泽兰水凝胶的溶胀动力学  

Swelling Kinetics of Hydrogels Prepared by Dewaxed Eupatorium Adenophorum with the Different Finesses

作　　者：文海波[1] 高欣[1] 陈克利[1] 张恒[1] 

机构地区：[1]昆明理工大学化学工程学院,云南昆明650504

出　　处：《高分子材料科学与工程》2013年第9期82-85,90,共5页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(21276119);国家大学生创新性实验计划项目(091067427);云南省教育厅科学研究基金项目(2012Y537);昆明理工大学测试基金(20130490)

摘　　要：以不同细度脱脂紫茎泽兰为原料,对比研究在相同的接枝共聚条件下所得水凝胶的溶胀行为。结果表明,在200mesh～325mesh内,随着原料颗粒细度降低,所得相应凝胶的溶胀速率和溶胀度都随之增大,水分子在凝胶中的扩散行为均可用non-Fickian扩散来描述;在325mesh～400mesh时所得凝胶的溶胀过程符合Fickian扩散规律。同时,通过Beren-Hopfenberg微分方程描述凝胶吸液值大于60%的溶胀行为,并计算得到相应凝胶的扩散常数。Using the dewaxing （or pulverized） eupatorium adenophorum （EA） with the different finesses as potential raw materials, the low-cost superabsorbent hydrogels were prepared under the same graft-copolymerization condition. The swelling behaviors of EA hydrogels were studied. The results show that the swelling rates and swelling ratios of EA hydrogels increase with the granule size of pulverized EA decreasing. It is found that the swelling exponents can indicate non-Fickian mechanism within the finesses range of 200 mesh～325 mesh, while the swelling mechanism belongs to Fickian transport for EA hydrogel within 325 mesh～400 mesh. Moreover, the Beren-Hopfenberg differential model was applied to water uptake above 60 %, the relaxation constants were obtained.

关 键 词：紫茎泽兰 脱脂 颗粒细度 水凝胶 溶胀动力学 

分 类 号：TQ352.2[化学工程]