有机气凝胶及炭气凝胶对茶碱的吸附动力学研究  

ADSORPTION KINETICS OF THEOPHYLLINE ON ORGANIC AEROGELS AND CARBON AEROGELS

作　　者：杨文金[1] 符若文[1] 

机构地区：[1]中山大学材料科学研究所教育部聚合物复合材料及功能材料重点实验室,广州510275

出　　处：《离子交换与吸附》2006年第2期126-133,共8页Ion Exchange and Adsorption

基　　金：国家自燃科学基金(50472029);广东省自然科学基金(20003038);广东省科技计划项目(2004A30404001)

摘　　要：制备出一系列不同结构的炭气凝胶和有机气凝胶。通过吸附实验,研究了其吸附茶碱的动力学行为。实验表明,炭气凝胶比有机气凝胶吸附速率快,吸附平衡时间短。炭气凝胶与文献报道的酚醛树脂对茶碱的吸附量相当,但吸附速率较快。茶碱在气凝胶上的吸附量随时间的变化规律遵从Langmuir方程,也符合假二级动力学吸附方程。A series of organic aerogels and carbon aerogels with different structure were prepared. The adsorption dynamics characteristics of theophylline on aerogels were studied. The results showed that the adsorption rates of carbon aerogels were rapider and the times to reach the plateau of carbon aerogels were shorter than those of organic aerogels. The adsorption rates of carbon aerogels were also rapider than that of phenolic resin, though carbon aerogels and phenolic resin had similar adsorption capacity of theophylline. The relation between the adsorption amounts of all samples and time obey Langmuir model and also followed pseudo second-order equation.

关 键 词：有机气凝胶 炭气凝胶 茶碱 动力学 

分 类 号：O647.3[理学—物理化学]