NaOH浓度对纳米Fe3O4/纤维素复合膜结构和性能的影响

doi:10.3969/j.issn.1673-5854.2016.05.001

生物质化学工程 ›› 2016, Vol. 50 ›› Issue (5): 1-6.doi: 10.3969/j.issn.1673-5854.2016.05.001

• 研究报告 • 下一篇

NaOH浓度对纳米Fe₃O₄/纤维素复合膜结构和性能的影响

张晓君, 马晓军

天津科技大学包装与印刷工程学院, 天津 300222

收稿日期:2015-12-17 出版日期:2016-09-30 发布日期:2016-12-03
通讯作者: 马晓军,教授,博士生导师,研究领域:木质资源综合利用;E-mail:mxj75@tust.edu.cn。 E-mail:mxj75@tust.edu.cn
作者简介:张晓君(1988-),女,天津人,硕士生,从事纤维素膜材料的研究
基金资助:
国家自然科学基金资助项目（31270607）

Effects of NaOH Concentration on Structure and Properties of Nano-Fe₃O₄/Cellulose Composite Membrane

ZHANG Xiao-jun, MA Xiao-jun

College of Packaging & Printing Engineering, Tianjin University of Science & Technology, Tianjin 300222, China

Received:2015-12-17 Online:2016-09-30 Published:2016-12-03

摘要/Abstract

摘要： 以N-甲基吗啉-N-氧化物（NMMO）天然纤维素膜为基材，NaOH为沉淀剂，利用原位共沉淀法制备出纳米Fe₃O₄/纤维素复合膜，通过X射线衍射光谱（XRD）、傅里叶变换红外光谱（FT-IR）、扫描电镜（SEM）、热重分析（TGA）仪和振动样品磁强计（VSM）研究了NaOH浓度对复合膜结构及性能的影响。结果表明：球形纳米Fe₃O₄能均匀分散并固定在纤维素膜基体上，且随NaOH浓度的增加，Fe₃O₄晶粒尺寸逐渐增大。复合薄膜红外谱图显示纳米Fe₃O₄与纤维膜之间形成较强的界面结合力。随NaOH浓度的从1.0 mol/L增加到3.0 mol/L，复合膜的热稳定性逐渐增强，其热失重残留量由19.3%提高到23.8%。VSM研究表明Fe₃O₄/纤维素复合膜具有良好的超顺磁性，NaOH浓度的增加能够提高复合膜的磁性能。

关键词: 纤维素膜, 原位共沉淀法, 结构性能

Abstract: Using NMMO-cellulose memberane as matrix and NaOH as precipitant,Fe₃O₄/cellulose composite membranes were prepared by in-situ co-precipitation method.The effects of NaOH concentration on the structure and properties of composite membranes were studied by scanning electron microscopy(SEM),X-ray diffraction(XRD), Fourier transform infrared spectrometer(FT-IR),thermal gravimetric analyzer(TGA) and vibration sample magnetometer(VSM).Results showed that the spherical magnetic Fe₃O₄ nanopartieles were dispersed uniformly and immobilized in the cellulose membranes, and the crystallite size of Fe₃O₄ on the surface of composite membrane increased with NaOH concentration increasing.FT-IR spectra showed that there were good interactions between cellulose and Fe₃O₄ in the membranes.The thermal stability of the composite membrane increased with the increase of NaOH concentration from 1.0 mol/L to 3.0 mol/L,and the residue rate of composite membrane increased from 19.3% to 23.8%.VSM showed that Fe₃O₄/cellulose composite membranes showed good superparamagnetic property,and magnetic properties of the composite membrane improved by increasing the NaOH concentration.

Key words: cellulose memberane, in-situ co-precipitation method, structure and properties

中图分类号:

TQ351

张晓君, 马晓军. NaOH浓度对纳米Fe₃O₄/纤维素复合膜结构和性能的影响[J]. 生物质化学工程, 2016, 50(5): 1-6.

ZHANG Xiao-jun, MA Xiao-jun. Effects of NaOH Concentration on Structure and Properties of Nano-Fe₃O₄/Cellulose Composite Membrane[J]. bce, 2016, 50(5): 1-6.

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NaOH浓度对纳米Fe₃O₄/纤维素复合膜结构和性能的影响

Effects of NaOH Concentration on Structure and Properties of Nano-Fe₃O₄/Cellulose Composite Membrane

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