半纤维素基磁性水凝胶的制备及其对染料吸附性能的研究

doi:10.11868/j.issn.1001-4381.2019.000076

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摘要

以玉米芯为原料提取半纤维素，通过自由基聚合和原位共沉淀法制备半纤维素基磁性水凝胶。采用离子色谱仪、扫描电镜、万能拉力机等手段进行表征，考察磁性水凝胶的性能，并对亚甲基蓝进行吸附性能研究。结果表明：所制备的半纤维素基磁性水凝胶具有超顺磁性，最大饱和磁化强度为21.83 A·m²/kg，最大压缩强度为0.119 MPa，对亚甲基蓝染料具有较好的吸附性，去除率达97%。所制备的半纤维素基磁性水凝胶溶胀性能好、具有超顺磁性、亚甲基蓝去除效果好，具有较好的应用前景。

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	赵璐婷
	张健
	李娜
	牛梅红
	平清伟

关键词 ：半纤维素, 磁性, 水凝胶, 染料, 吸附

Abstract：

The hemicellulose-based magnetic hydrogel was prepared by free radical polymerization and in situ co-precipitation from corn cob. The properties of the magnetic hydrogel were characterized by means of ICS, scanning electron microscopy(SEM) and universal tensile testing machine. Moreover the adsorption properties on methylene blue were studied. The results show that the hemicellulose-based magnetic hydrogel has super-paramagnetism, with a maximum saturation magnetization intensity of 21.83 A·m²/kg and a maximum compression strength of 0.119 MPa. The adsorption properties on methylene blue are good as well and the removal rate reaches 97%. The prepared hemicellulose-based magnetic hydrogel has good swelling properties, super-paramagnetism and removal efficiency of methylene blue. Furthermore it has better application prospects.

Key words： hemicellulose magnetism hydrogel dye adsorption

收稿日期: 2019-01-22 出版日期: 2020-11-20

中图分类号:

TS69

基金资助:华南理工大学国家重点实验室项目(201804);齐鲁工业大学重点实验室项目(KF201710);天津科技大学重点实验室项目(201804)

通讯作者: 张健,李娜 E-mail: zhangjian@dlpu.edu.cn

作者简介: 李娜(1980-), 女, 副教授, 博士, 研究方向为纤维素类废弃物能源化研究, 绿色材料吸附剂的制备及应用
张健(1981-), 女, 教授, 博士, 研究方向为生物质能源精炼, 联系地址:辽宁省大连市甘井子区轻工苑1号大连工业大学(116034), E-mail:zhangjian@dlpu.edu.cn

引用本文:

赵璐婷, 张健, 李娜, 牛梅红, 平清伟. 半纤维素基磁性水凝胶的制备及其对染料吸附性能的研究[J]. 材料工程, 2020, 48(11): 85-91.
Lu-ting ZHAO, Jian ZHANG, Na LI, Mei-hong NIU, Qing-wei PING. Preparation of hemicellulose-based magnetic hydrogel and its adsorption properties for dye. Journal of Materials Engineering, 2020, 48(11): 85-91.

链接本文:

http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2019.000076 或 http://jme.biam.ac.cn/CN/Y2020/V48/I11/85

Fig.1 半纤维素基磁性水凝胶的制备

Table 1 水凝胶工艺优化因素水平表

Table 2 半纤维素单糖组分分析(质量分数/%)

Table 3 正交实验极差分析表

Table 4 方差分析结果

Fig.2 半纤维素基水凝胶溶胀效果图
(a)水凝胶；(b)溶胀前；(c)溶胀后

Fig.3 半纤维素基磁性水凝胶
(a)溶胀的水凝胶；(b)铁盐溶液中溶胀的水凝胶；(c)磁性水凝胶

Fig.4 Fe²⁺浓度对磁场响应时间的影响

Fig.5 水凝胶的磁化曲线图

Fig.6 水凝胶的载荷-位移曲线图

Fig.7 磁性水凝胶的载荷-位移曲线图

Fig.8 磁性水凝胶用量对亚甲基蓝去除率的影响

Fig.9 时间对亚甲基蓝吸附量的影响

Fig.10 半纤维素基水凝胶表面形貌

Fig.11 半纤维素基磁性水凝胶表面形貌

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