新型半纤维素基磁性水凝胶的制备及性能

引用本文: 李亚婧, 孙晓锋, 叶青, 刘柏辰, 吴耀国. 新型半纤维素基磁性水凝胶的制备及性能[J]. 物理化学学报, 2014, 30(1): 111-120. doi: 10.3866/PKU.WHXB201310313 shu

Citation: LI Ya-Jing, SUN Xiao-Feng, YE Qing, LIU Bai-Chen, WU Yao-Guo. Preparation and Properties of a Novel Hemicellulose-Based Magnetic Hydrogel[J]. Acta Physico-Chimica Sinica, 2014, 30(1): 111-120. doi: 10.3866/PKU.WHXB201310313 shu

新型半纤维素基磁性水凝胶的制备及性能

基金项目:
国家自然科学基金(20707016)，陕西省青年科技新星项目(2012KJXX-10) (20707016)，陕西省青年科技新星项目(2012KJXX-10)

西北工业大学研究生种子基金(Z2013154)资助 (Z2013154)

摘要:

采用H₂O₂-Vc氧化还原体系引发半纤维素衍生物，以表面修饰的Fe₃O₄粒子作为磁性组分，利用接枝共聚方法制备了新型半纤维素基磁性水凝胶. 分别用傅里叶变换红外(FTIR)光谱、X射线光电子能谱(XPS)和扫描电子显微镜(SEM)对水凝胶的结构及形貌进行了表征，利用X射线衍射(XRD)和振动样品磁强计(VSM)对水凝胶的晶型结构及磁性能进行了分析，发现Fe₃O₄粒子均匀分散在凝胶网络中，半纤维素基磁性水凝胶表现出良好的顺磁性. 考察了丙烯酸/半纤维素比例、Fe₃O₄粒子含量及交联剂用量对水凝胶溶胀性能的影响，并探讨了该水凝胶的溶胀机理，它在pH 8 缓冲溶液中的溶胀较好符合Fickian 和Schott 动力学模型. 通过SEM和溶胀性能分析表明，随着pH值的升高水凝胶的孔径增大，水凝胶的溶胀率逐渐增大. 制备的水凝胶被用于溶菌酶吸附研究，结果表明磁性凝胶的吸附量大于非磁性水凝胶，水凝胶的吸附行为符合Freundlich 和Temkin 等温模型.

关键词:

English

Preparation and Properties of a Novel Hemicellulose-Based Magnetic Hydrogel

1.
Key Laboratory of Space Applied Physics and Chemistry, Ministry of Education, Northwestern Polytechnical University, Xi'an 710129, P. R. China
Received Date: 29 July 2013
Available Online: 01 January 2014
Fund Project:
国家自然科学基金(20707016)，陕西省青年科技新星项目(2012KJXX-10)

西北工业大学研究生种子基金(Z2013154)资助

Abstract:

Hydrogels are important functional materials with many potential applications. Anovel hemicellulosebased magnetic hydrogel was synthesized using a graft copolymer method, with H₂O₂-Vc as a redox initiator system to initiate the hemicellulosic derivative and surface-modified Fe₃O₄ particles as the magnetic component. The structures and morphologies of the prepared magnetic hydrogels were investigated using Fourier-transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM). The crystal structure of the modified Fe₃O₄ particles and the magnetic behaviors of the hemicellulosebased magnetic hydrogels were analyzed using X-ray diffraction (XRD) and a vibration sample magnetometer (VSM), respectively. The results showed that the Fe₃O₄ particles were well dispersed in the hydrogel matrix and the prepared hydrogels had paramagnetic properties. The effects of the acrylic acid/hemicellulose ratio and the amounts of Fe₃O₄ particles and cross-linker on the swelling ratio of the hydrogels were studied, and the swelling mechanism of the hydrogels was explored. The swelling behaviors of the hydrogels were simulated using Fickian and Schott kinetic models in a pH 8 buffer solution. The pore size and swelling ratio of the prepared hydrogels increased with increasing the pH value because the ―COOH groups in the hydrogels were converted to ―COO^- at higher pH values. In addition, the prepared hydrogels were used to adsorb lysozyme; the adsorption capacity of the magnetic hydrogel was much higher than that of a non-magnetic hydrogel, and the equilibrium adsorption data fitted the Freundlich and Temkin isotherm models well.

Key words:

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沈阳化工大学材料科学与工程学院沈阳 110142

新型半纤维素基磁性水凝胶的制备及性能

English

Preparation and Properties of a Novel Hemicellulose-Based Magnetic Hydrogel

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南：你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

新型半纤维素基磁性水凝胶的制备及性能

English

Preparation and Properties of a Novel Hemicellulose-Based Magnetic Hydrogel

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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通讯作者: 陈斌, bchen63@163.com

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