Fe_3O_4/木材复合材料的制备及磁性  

Preparation and magnetic properties of Fe_3O_4/wood composite

作　　者：高洪林[1] 吴国元[2] 张艮林[1] 管洪涛[2] 杨项军[3] 兰尧中[1] 

机构地区：[1]云南大学工程技术研究院,云南昆明650091 [2]云南大学物理科学技术学院,云南昆明650091 [3]云南大学化学科学与工程学院,云南昆明650091

出　　处：《功能材料》2010年第11期1900-1902,1906,共4页Journal of Functional Materials

基　　金：国家重点基础研究发展计划(973计划)资助项目(2007CB613607);云南省自然科学基金资助项目(2006E0012M;2006E0009Q);云南省教育厅科研基金资助项目(09Y0049)

摘　　要：以FeCl3和FeCl2混合液为浸渍溶液,以普通云南杉木为基体,在常温条件下,采用原位化学合成法制备出Fe3O4/木材复合材料。用X射线衍射仪、红外光谱仪及扫描电镜对复合材料的结构进行了表征,用振动样品磁强计研究了材料的磁性能。结果表明,木材中生成Fe3O4晶粒的平均粒径为14nm,但有一定团聚,木材空隙中的部分铁氧体增大到0.5～2.5μm;合成的Fe3O4与木材间有较强的相互作用,影响了复合材料的磁性能;浸渍溶液浓度对材料的磁性能具有一定影响,当浸渍溶液中Fe离子总浓度为1.2mol/L时材料磁性最强,浸渍溶液浓度过高或过低都会引起材料磁性能的降低;木材的纤维结构对材料磁性能也有一定影响,当外加磁场方向平行于材料纤维方向时,材料的剩余磁化强度要大于磁场方向垂直纤维方向时材料的剩余磁化强度。Fe3O4/wood composites were prepared by the in-situ chemosynthesis method at room temperature with Yunnan fir wood as the matrix and mixed solution of FeCl3 and FeCl2 as the impregnating solution.The structure characterized by X-ray diffraction（XRD）,and scanning electron microscopy（SEM）shows that the average particle size of Fe3O4 crystal is about 14nm,but the particles settled in the hole of wood are aggregated with the size changed to 0.5-2.5μm.Fourier transform infrared（FT-IR）analysis indicates that there exists interaction between Fe3O4 particles and the wood matrix,and the interaction influences the magnetic property of the composite.The magnetic feature was characterized by vibrating sample magnetometer（VSM）.The results show that the concentration of impregnating solution and the wood fiber direction has some effects on the magnetization.It is found that the magnetization of the composite reaches to its maximum value with Fe ion concentration of 1.2mol/L in the impregnating solution.Samples under the magnetic field with the same direction as their fiber directions have higher remain magnetization.

关 键 词：复合木材 磁性材料 原位化学制备 磁性能 各向异性 

分 类 号：TB332[一般工业技术—材料科学与工程]