多枝型磁性壳聚糖微球MCS-g-PSSS的制备及对盐酸黄连素的吸附性能  

Preparation of multi-branched magnetic chitosan microspheres MCS-g-PSSS and their adsorption properties for berberine hydrochloride

作　　者：门吉英[1] 韩圆睿 杨园园 吕振艳 王吉 师红星 MEN Ji-ying;Han Yuan-rui;Yang Yuan-yaun;LV Zhen-yan;WANG Ji;SHI Hong-xing(School of Chemistry and Chemical Engineering,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学化学与化工学院,山西太原030051

出　　处：《化学研究与应用》2023年第5期1050-1058,共9页Chemical Research and Application

基　　金：国家青年科学基金项目(21805249)资助;山西省回国留学人员科研项目(2020-100)资助。

摘　　要：以天然多聚糖壳聚糖为基球,其表面的氨基与引发剂过硫酸铵构成氧化-还原引发体系,引发阴离子单体对苯乙烯磺酸钠接枝聚合至微球表面,制得MCS-g-PSSS功能微球。采用红外光谱、扫描电子显微镜、X-射线光电子能谱、磁共振表征微球的结构和形貌。探索MCS-g-PSSS对盐酸黄连素的吸附行为,阐明吸附机制;考察吸附动力学及吸附等温线。采用PFO,PSO,Bangham拟合吸附动力学;Langmuir、Freundlich、Temkin模型拟合吸附等温线;研究功能微球的重复使用性。结果表明,凭借静电和π-π相互作用,MCS-g-PSSS对盐酸黄连素在pH=7吸附量达到593.81mg·g^(-1)。MCS-g-PSSS对盐酸黄连素在180min时吸附达到平衡,符合PSO模型;随着温度的升高吸附量增加,属于Langmuir吸附模型,是熵驱动的吸热过程,盐度增加吸附量降低,Ca^(2+)比Na^(+)更不利于吸附。六次循环,吸附量可以达到首次吸附的86%。Chitosan was used as based microspheres.The amino groups on the Chitosan and ammonium persulfate in the solution constituted redox initiation system,which initiated sodium styrene sulfonate graft onto Chitosan microspheres,obtaining functional MCS-g-PSSS microspheres.FT-IR,SEM,XPS and VSM were used to characterized MCS-g-PSSS structure and morphology.The adsorption behavior of MCS-g-PSSS for berberine hydrochloride was explored and adsorption mechanism was studied.The adsorption kinetic and isotherms were investigated.PFO,PSO and Bangham models were used to fit adsorption kinetic and Langmuir,Freundlich and Temkin models were used to fit adsorption isotherms,respectively.The reusability of MCS-g-PSSS was studied.The results show that the adsorption capacity of MCS-g-PSSS for berberine hydrochloride reaches 593.81mg·g^(-1) at pH=7 via electrostatic andπ-πinteraction.The adsorption kinetic time is 180min,which fits PSO model.The adsorption amount increases with rising the temperature,which is fit to Langmuir model.The adsorption is an endothermic process driven by entropy.The adsorption amount decreases with the increase of salt,and Ca^(2+)is more detrimental to adsorption than Na^(+).The adsorption amount can reach 86%of the first adsorption by six cycles.

关 键 词：多枝型聚合物 黄连素 废水处理 静电相互作用 

分 类 号：O636.12[理学—高分子化学]