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生物质化学工程 ›› 2018, Vol. 52 ›› Issue (3): 1-8.doi: 10.3969/j.issn.1673-5854.2018.03.001

• 研究报告 •    下一篇

甲基橙印迹磁性壳聚糖聚合物的制备及吸附特性

李漫1, 蔡照胜2, 房桂干1,3, 梁龙1,3, 周静1   

  1. 1. 中国林业科学研究院 林产化学工业研究所;生物质化学利用国家工程实验室;国家林业局 林产化学工程 重点开放性实验室;江苏省 生物质能源与材料重点实验室, 江苏 南京 210042;
    2. 盐城工学院 化学化工 学院, 江苏 盐城 224051;
    3. 南京林业大学 林业资源高效加工利用协同创新中心, 江苏 南京 210037
  • 收稿日期:2017-01-18 出版日期:2018-05-30 发布日期:2018-05-31
  • 通讯作者: 蔡照胜(1968-),男,教授,主要从事生物质资源的化学研究与利用;E-mail:jsyc_czs@163.com。 E-mail:jsyc_czs@163.com
  • 作者简介:李漫(1992-),女,山东枣庄人,硕士生,研究方向为竹材纤维功能化改性及应用性能
  • 基金资助:
    "十二五"国家科技支撑计划资助(2014BAD02B02);江苏省生物质能源与材料重点实验室资助项目(JSBEM-S-201510);江苏省自然科学基金资助项目(BK20160151)

Preparation and Adsorption of Methyl Orange Imprinted Magnetic Chitosan Polymer

LI Man1, CAI Zhaosheng2, FANG Guigan1,3, LIANG Long1,3, ZHOU Jing1   

  1. 1. Institute of Chemical Industry of Forest Products, CAF;National Engineering Lab. for Biomass Chemical Utilization;Key and Open Lab. of Forest Chemical Engineering, SFA;Key Lab. of Biomass Energy and Material, Jiangsu Province, Nanjing 210042, China;
    2. Department of Chemistry, Yancheng Institute of Technology, Yancheng 224051, China;
    3. Collaborative Innovation Center for High Efficient Processing and Utilization of Forestry Resources, Nanjing Forestry University, Nanjing 210037, China
  • Received:2017-01-18 Online:2018-05-30 Published:2018-05-31

摘要: 以通过溶胶-凝胶法自制的Fe3O4@壳聚糖(CTS)微球为载体,甲基橙(MO)为模板分子,采用水溶液聚合法制得磁性壳聚糖表面分子印迹聚合物(MMIPs)。通过SEM、XRD、FT-IR和VSM表征了MMIPs的结构和性能,并探究了其对MO的识别与选择性吸附特性。研究表明:与非印迹聚合物(NIMPs,饱和吸附量为20.56 mg/g)相比,在相同条件(pH值6.5、25℃)下,MMIPs对MO具有明显的特异性吸附能力,在60 min左右吸附饱和,饱和吸附量(Qe)可达113.16 mg/g;MMIPs对MO的吸附符合Langmuir等温吸附模型和准二级吸附动力学模型;在其他干扰染料的存在下,MMIPs的选择性系数(K)最高可达2.85,对MO具有选择识别性;此外,吸附完成后MMIPs可在磁场作用下快速分离,解吸附后循环使用5次,吸附率均在90%以上。

关键词: 壳聚糖微球, 磁性分子印迹聚合物, 甲基橙, 特异性吸附

Abstract: Magnetic chitosan(Fe3O4@CTS) microspheres were prepared through sol-gel method firstly. Then, a novel, magnetic molecularly imprinted polymers(MMIPs) were synthesized by aqueous solution polymerization with Fe3O4@CTS as support and functional monomer and methyl orange as template molecules. Characterizations of the obtained MMIPs were achieved by SEM, XRD, FT-IR and VSM. Batch adsorption experiments were performed to investigate the adsorption conditions, selectivity and reusability of the adsorption of MO on MIMPs. The results showed that the maximum adsorption capacity was 113.16 mg/g and equilibrium adsorption was achieved around 60 min observed at pH value 6.5 and temperature 25℃, and the MMIPs had specific adsorption capacity for MO compared with the non-imprinted magnetic particles(NIMPs). Adsorption process could be well described by Langmuir adsorption isotherms and the kinetic data could be fitted with pseudo-second-order equation. Furthermore, the selectivity coefficient of MO and other dyes onto MMIPs indicated an overall preference with the maximum selectivity coefficient(K) of 2.85. Moreover, MMIPs could be separated by external magnet, which could be reused for 5 times with a high adsorption efficiency overall 90% after desorption.

Key words: chitosan microspheres, magnetic molecularly imprinted polymers, methyl orange, specific adsorption

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