磁性Fe3O4/P(St-co-MMA)微纳米复合物的制备和性能*

doi:10.11901/1005.3093.2015.184

材料研究学报

2016, Vol. 30

Issue (9): 711-716 DOI: 10.11901/1005.3093.2015.184

研究论文

本期目录 | 过刊浏览

磁性Fe₃O₄/P(St-co-MMA)微纳米复合物的制备和性能*

雷文娟,马应霞,喇培清,刘二燕,李向前,张文娟

兰州理工大学有色金属先进加工与再利用省部共建国家重点实验室兰州 730050

Preparation and Property of Fe₃O₄/P(St-co-MMA) Micro-nano Composites

Wenjuan LEI,Yingxia MA,Peiqing LA,Eryan LIU,Xiangqian LI,Wenjuan ZHANG

State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China

引用本文:

雷文娟,马应霞,喇培清,刘二燕,李向前,张文娟. 磁性Fe₃O₄/P(St-co-MMA)微纳米复合物的制备和性能*[J]. 材料研究学报, 2016, 30(9): 711-716.
Wenjuan LEI, Yingxia MA, Peiqing LA, Eryan LIU, Xiangqian LI, Wenjuan ZHANG. Preparation and Property of Fe₃O₄/P(St-co-MMA) Micro-nano Composites[J]. Chinese Journal of Materials Research, 2016, 30(9): 711-716.

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摘要:

以单分散的苯乙烯-甲基丙烯酸甲酯共聚物(P(St-co-MMA))微球为载体, FeCl₃6H₂O和FeSO₄7H₂O为前驱体, 用反相共沉淀法制备了Fe₃O₄/P(St-co-MMA)微纳米原位复合物。使用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、傅里叶红外光谱仪(FTIR)、X射线衍射仪(XRD)、振动样品磁强计(VSM)以及氮吸附/脱附等温线等手段对Fe₃O₄/P(St-co-MMA) 的形貌、结构、磁性能、孔径、孔体积和比表面积进行了表征。结果表明, 纳米级Fe₃O₄已经成功地负载在微米级P(St-co-MMA) 的表面。在制备的Fe₃O₄/P(St-co-MMA) 微纳米复合物中有介孔, 其平均孔径、孔体积和比表面积分别为15.41 nm、0.15953 cm³/g和32.82 m²/g。Fe₃O₄/P(St-co-MMA) 微纳米复合物具有超顺磁性和较好的磁响应性, 能满足固液相磁分离的要求。

关键词 ：磁性材料, Fe3O4/P(St-co-MMA), 反相共沉淀法, 超顺磁性, 微纳米复合物

Abstract：

Micro-nano composites of Fe₃O₄/P(St-co-MMA) were in-situ synthesized by inverse coprecipitation method using microspheres of monodispersed styrene-methyl methacrylate copolymer P(St-co-MMA) as carrier, FeCl₃6H₂O and FeSO₄7H₂O as precursor. The microstructure, crystallographic structure, magnetic property, average pore size, volume of pores and BET specific surface area of Fe₃O₄/P(St-co-MMA) were characterized by scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) spectroscopy, viberating sample magnetometer (VSM) and nitrogen adsorption/desorption isotherms. The results show that nano paricles of Fe₃O₄ were successfully deposited on the suface of micro-sized P(St-co-MMA). The mesoporous in Fe₃O₄/P(St-co-MMA) micro-nano composites were confirmed. The average pore size, the volume of pores, and the BET specific surface area of Fe₃O₄/P(St-co-MMA) were 15.41 nm, 0.15953 cm³/g and 32.82 m²/g, respectively. The micro-nano composites Fe₃O₄/P(St-co-MMA) have magnetic property in superparamagnetism and good magnetic response, so Fe₃O₄/P(St-co-MMA) can meet the requirement for fast solid-liquid separation from liquid suspension with an applied external magnetic field.

Key words： magnetic materials Fe3O4/P(St-co-MMA) an inverse coprecipitation method superparamagnetism micro-nano composites

收稿日期: 2015-12-05

基金资助:* 国家自然科学基金51403091, 甘肃省自然科学基金1310RJZA081, 省部共建有色金属先进加工与再利用国家重点实验室开放基金SKL1315资助项目

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https://www.cjmr.org/CN/10.11901/1005.3093.2015.184 或 https://www.cjmr.org/CN/Y2016/V30/I9/711

图1 Fe3O4/P(St-co-MMA)制备示意图

图2 P(St-co-MMA)的SEM照片、粒度分布图和Fe3O4/P(St-co-MMA的SEM照片、TEM照片、EDX图谱以及选区电子衍射

图3 Fe3O4/P(St-co-MMA)的FTIR图谱

图4 Fe3O4/P(St-co-MMA)的XRD谱图

图5 Fe3O4/P(St-co-MMA)的氮吸附/解吸等温线

表1 P(St-co-MMA)和Fe3O4/P(St-co-MMA)的物理性能

图6 Fe3O4/P(St-co-MMA)的磁滞回线, 插图为Fe3O4/P(St-co-MMA)分散在乙醇中(a)和放置在外部磁场下的磁响应(b)数码照片)

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