化工进展Issue(1)：189-196,8.DOI:10.16085/j.issn.1000-6613.2016.01.025
木薯淀粉磁性微球的结构表征及其对溶菌酶的吸附性能
Structural characterization of magnetic cassava-starch microspheres and their application in adsorption of lysozyme
摘要
Abstract
The magnetic cassava starch microspheres have been prepared using Fe3O4 and cassava starch as starting materials. Fourier transform infrared spectrum,X-ray diffraction,thermal analyzer, scanning electron microscope,laser granulometer,and magnetic balance were used to characterize the product. The adsorption behavior of lysozyme on these microspheres was studied. The influence of magnetic microsphere dosage,solution pH,adsorption temperature and time on the adsorption efficiency was evaluated by single factor experiments. The results showed that magnetic starch microspheres contain 19.71% of Fe3O4,withD50 (median diameter) of 15.40µm,and magnetic susceptibility of 1.571×10−3cm3/g . When the dosage of microspheres was 1.25g,with solution pH value of 10,adsorption temperature of 25℃,adsorption time of 80min,the best adsorption efficiency of lysozyme on the microsphere was 84.67%. Based on the correlation coefficientR2,the adsorption rate can be better described by pseudo-second-order kinetics(R2=0.99997) than by pseudo-first-order kinetics (R2=0.99174),and the particle diffusion model(R2=0.69996).关键词
木薯淀粉/磁性微球/溶菌酶/吸附/动力学模型Key words
cassava starch/magnetic microsphere/lysozyme/adsorption/kinetics model分类
通用工业技术引用本文复制引用
蓝平,何日梅,封余贤,李庭龙,熊根,韦金峦,梁佩珠,廖安平..木薯淀粉磁性微球的结构表征及其对溶菌酶的吸附性能[J].化工进展,2016,(1):189-196,8.基金项目
广西高校人才小高地建设创新团队计划（桂教人[2011]47号），广西自然科学基金面上项目（2013GXNSFAA019037）、广西高校科学技术研究项目（2013YB072）、广西民族大学研究生教育创新计划（gxun-chxs2015084）、广西民族大学-广西化工研究院研究生联合培养基地专项资金（BYB-014）及广西壮族自治区大学生创新创业训练计划（201410608048）项目。 （）
