松香基磁性微球的制备及其对Mn^(2+)的吸附研究  

Preparation of Core-shell Magnetic Rosin-based Polymer Microspheres and Their Adsorption Kinetics and Thermodynamics of Mn^(2+)

作　　者：黎克纯 雷福厚 卢建芳 周菊英 赵彦芝 LI Kechun1, LEI Fuhou1,2, LU Jianfang1,2, ZHOU Juying1,2, ZHAO Yanzhi1,2(1.School of Chemistry and Chemical Engineering, Guangxi University tor Nationalities, Nanning 530006, China ; 2.Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Nanning 530006, Chin)

机构地区：[1]广西民族大学化学化工学院,广西南宁530006 [2]广西林产化学与工程重点实验室,广西南宁530006

出　　处：《林产化学与工业》2018年第4期87-94,共8页Chemistry and Industry of Forest Products

基　　金：广西高校中青年教师基础能力提升项目(2017KY0179);国家自然科学基金资助项目(21667005);广西民族大学科研项目(2016MDQN019)

摘　　要：以马来松香乙二醇丙烯酸酯作为交联剂,甲基丙烯酸、甲基丙烯酸甲酯为单体,Fe_3O_4为磁核,通过化学沉淀法及悬浮聚合制备出松香基磁性微球(Fe_3O_4@RPM),并优化了制备条件。分别采用红外光谱、扫描电镜、X射线衍射和热重等分析手段,对Fe_3O_4@RPM的结构进行表征,并采用静态吸附法,研究了具有菲环骨架的高分子磁性微球吸附Mn2+过程中的热力学和动力学。研究结果表明:制备具有菲环骨架的高分子磁性微球条件为70℃,400 r/min,1 g偶氮二异丁腈为引发剂,反应4 h,此条件下磁性微球含磁23.5%。对Mn2+的吸附符合准二级动力学模型;在实验浓度和温度范围内,吸附热力学研究显示,ΔH>0、ΔG<0、ΔS>0,说明该吸附过程为自发的吸热过程。The core-shell magnetic rosin-based polymer microspheres Fe3O 4@RPM were synthesized by chemical precipitation and suspension polymerization with maleic rosin ethylene glycol acrylate as cross-linking agent, methacrylic acid and methyl methacrylate as monomers, and Fe3O4 as a magnetic core. The preparation conditions were optimized. The structure of Fe3O4@RPM was characterized by Fourier transform infrared spectrometer（FT-IR）, field emission scanning electron microscope （FESEM）, X-ray diffraction instrument（XRD）, and thermogravimetric analysis（TGA）, and so on. The adsorption kinetics and thermodynamics for adsorbing Mn^2＋ were studied through static adsorption experiments. The results showed that the preparation conditions of the polymeric magnetic microspheres with phenanthrene framework were shaking at the speed of 400 r/min,adding 1 g azodiisobutyronitrile as initiator and reacting for 4 h at 70 ℃. The second-order kinetics model could well describe the adsorption process of Mn^2＋ in the experimental range of concentration and temperature, the adsorption thermodynamic studies showed that ΔH ＆gt;0, ΔG ＆lt;0, ΔS ＆gt;0,which indicated that the adsorption was a spontaneous endothermic process.

关 键 词：菲环骨架 高分子磁性微球 MN^2+ 动力学 热力学 

分 类 号：TQ35[化学工程]