松香基氨基化聚合物微球对胭脂红的吸附热力学及动力学  

Thermodynamics and kinetics of carmine adsorption on rosin-based aminated polymer microspheres

作　　者：陈勇 张发爱[2] 邵金涛 许建本 余彩莉[1] CHEN Yong;ZHANG Fa-ai;SHAO Jin-tao;XU Jian-ben;YU Cai-li(College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004,China;College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004,China)

机构地区：[1]桂林理工大学化学与生物工程学院,广西桂林541004 [2]桂林理工大学材料科学与工程学院,广西桂林541004

出　　处：《桂林理工大学学报》2019年第2期439-445,共7页Journal of Guilin University of Technology

基　　金：国家自然科学基金项目(51863007; 31160148)

摘　　要：研究了松香基氨基化聚合物微球[P(RAG/St/NH2)]在不同pH值和吸附时间对胭脂红的吸附,以及吸附动力学、热力学特性,初步探讨了吸附反应机理。采用FT-IR、 XPS、 SEM和热重等对微球进行了表征。结果表明:pH=2时, P(RAG/St/NH2)微球对胭脂红的吸附效果最好,并且吸附前后微球球形无变化;微球对胭脂红的吸附符合伪二级吸附动力学和Langmuir等温吸附模型,说明吸附过程是以化学吸附为主;探究了温度为303、308、313和318 K的吸附过程,发现ΔH> 0、ΔG<0、ΔS> 0,表明吸附属于自发吸热熵增的过程,升高温度有利于微球对胭脂红的吸附。The effect of solution pH and time on the adsorption of carmine by rosin-based aminated polymer microspheres(P(RAG/St/NH2)) was studied. The thermodynamic and kinetic behavior of carmine adsorption on [P(RAG/St/NH2)]were investigated. The microspheres were characterized by FT-IR, XPS, SEM and TGA before and after the adsorption. The results showed that P(RAG/St/NH2) had the best adsorption of carmine at pH=2, and there was no change in the sphere shape of the microspheres before and after adsorption. The adsorption behavior agreed with the pseudo-second-order adsorption kinetics and the Langmuir isotherm model, indicating that the adsorption process belonged to the monolayer chemisorption. At different temperatures, the adsorption process will be ΔH>0,ΔG<0,ΔS>0;indicating that adsorption belonged to the process of spontaneous endothermic and entropy increase. The increase of temperature favored the adsorption of carmine.

关 键 词：松香 氨基微球 吸附 热力学 动力学 

分 类 号：O647.3[理学—物理化学]