松香基磁性微球的制备及其对Mn2+的吸附研究

doi:10.3969/j.issn.0253-2417.2018.04.014

林产化学与工业 ›› 2018, Vol. 38 ›› Issue (4): 87-94.doi: 10.3969/j.issn.0253-2417.2018.04.014

松香基磁性微球的制备及其对Mn²⁺的吸附研究

黎克纯¹, 雷福厚^1,2, 卢建芳^1,2, 周菊英^1,2, 赵彦芝^1,2

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

收稿日期:2018-01-17 出版日期:2018-08-25 发布日期:2018-08-10
通讯作者: 卢建芳,实验师,研究方向为天然产物改性及应用;E-mail:lujianfang@gxun.edu.cn。 E-mail:lujianfang@gxun.edu.cn
作者简介:黎克纯(1984-),男,广西扶绥人,工程师,硕士,研究方向为环保及三废处理;E-mail:likechun@gxun.edu.cn
基金资助:
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）

Preparation of Core-shell Magnetic Rosin-based Polymer Microspheres and Their Adsorption Kinetics and Thermodynamics of Mn²⁺

LI Kechun¹, LEI Fuhou^1,2, LU Jianfang^1,2, ZHOU Juying^1,2, ZHAO Yanzhi^1,2

1. School of Chemistry and Chemical Engineering, Guangxi University for Nationalities, Nanning 530006, China;
2. Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Nanning 530006, China

Received:2018-01-17 Online:2018-08-25 Published:2018-08-10

摘要/Abstract

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，Fe₃O₄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（Fe₃O₄@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Fe₃O₄@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。

关键词: 菲环骨架, 高分子磁性微球, Mn²⁺, 动力学, 热力学

Abstract: The core-shell magnetic rosin-based polymer microspheres Fe₃O₄@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 Mn²⁺ 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 Mn²⁺ in the experimental range of concentration and temperature, the adsorption thermodynamic studies showed that ΔH >0,ΔG <0,ΔS >0,which indicated that the adsorption was a spontaneous endothermic process.

Key words: phenanthrene framework, magnetic polymer microspheres, Mn²⁺, kinetics, thermodynamics

中图分类号:

TQ35

黎克纯, 雷福厚, 卢建芳, 周菊英, 赵彦芝. 松香基磁性微球的制备及其对Mn²⁺的吸附研究[J]. 林产化学与工业, 2018, 38(4): 87-94.

LI Kechun, LEI Fuhou, LU Jianfang, ZHOU Juying, ZHAO Yanzhi. Preparation of Core-shell Magnetic Rosin-based Polymer Microspheres and Their Adsorption Kinetics and Thermodynamics of Mn²⁺[J]. Chemistry and Industry of Forest Products, 2018, 38(4): 87-94.

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松香基磁性微球的制备及其对Mn²⁺的吸附研究

Preparation of Core-shell Magnetic Rosin-based Polymer Microspheres and Their Adsorption Kinetics and Thermodynamics of Mn²⁺

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