Synthesis of Carboxymethylcellulose Picric Acid Ester and Its Characterization
Ester of carboxymethylcellulose-based picric acid(CMC-PA) was prepared from carboxymethylcellulose (CMC) and picric acid(PA) by the mild reactive conditions of acidylation with chloric. The structure of CMC-PA was characterized by FTIR,Element analysis, XRD and CPMAS13C NMR. Influences of reaction conditions, such as reaction temperature, reaction time, ratio of CMC to PA and amount of pyridine, were studied by mass fraction of nitrogen. CMC-PA had been already synthesized by FITR, Element analysis,and CPMAS13C NMR. Result showed that the synthetical conditions were obtained as ratio of CMCCl to PA 2 : 1 (by weight), amount of pyridine 50 mL, reaction temperature 85℃ and reaction time 4 hours. The adsorption property of CMC-PA to creatinine was studied under simulated biological human body conditions. The kinetic and isothermy curve was given. Results showed that adsorption amount reached an equilibrium value after 10 hours, and the maximum adsorption amount was 1.75mg/g. Equilibrium data of creatinine fit well with Freundich equation. It indicated that the adsorption was mainly chemical adsorption. The Freundich index(1/n) was less than 1,which implied that the adsorption was preferential process.
Carboxymethylcellulose Picric Acid Creatinine adsorption equilibrium
Xiao-feng DAI Gui-zhen FANG
College of Material Science and Engineering, Northeast Forestry University, Haerbin 150040
国际会议
南京
英文
470-474
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）