N,O-羧甲基壳聚糖磁性复合微球的制备与表征  

Preparation and Characterization of Magnetic N,O-carboxymethyl Chitosan Composite Microspheres

作　　者：马烽[1,2] 陆丰艳 秦岩[2] 王睿[1] 

机构地区：[1]山东大学环境科学与工程学院,济南250100 [2]齐鲁工业大学化学与制药工程学院,济南250353

出　　处：《材料工程》2014年第8期41-45,共5页Journal of Materials Engineering

基　　金：山东省博士后创新项目专项资助资金(200903051);山东省科技计划资助项目(2006GG2203027;2010G0020324);济南市高校自主创新计划资助(201004049)

摘　　要：采用水热法制备出NiFe2O4磁性纳米粒子.以壳聚糖和氯乙酸为原料,在碱性条件下制得N,O-羧甲基壳聚糖.以羧甲基壳聚糖为骨架材料,戊二醛作为交联剂,采用乳化交联法制备出N,O-羧甲基壳聚糖磁性微球.通过红外光谱、X射线衍射、扫描电镜、热重分析以及交变梯度磁强计对材料的组成、结构、形貌、热性能和磁性能进行测试表征.结果表明：合成的NiFe2O4为立方尖晶石结构,粒径为10～80nm,饱和磁化强度为43.3A＆#183; m2＆#183;kg-1.制备的N,O-羧甲基壳聚糖磁性微球为表面光滑的球形,粒径为6～25μm,微球中NiFe2 O4的质量分数为35.6％,饱和磁化强度为14.3A＆#183;m2＆#183;kg-1.The NiFe204 nanoparticles were synthesized by hydrothermal synthesis method. N,O-car- boxymethyl chitosan （N,O-CMC） was obtained with chloroacetic acid and chitosan in alkaline condi- tion. Magnetic N,O-carboxymethyl chitosan microspheres （magnetic N, O-CMC microspheres） were prepared by emulsion crosslinking method using carboxymethyl chitosan as matrix material and glutar- aldehyde as a crosslinking agent. The compositions, structure, morphology, thermal stability and magnetic property of the materials were characterized by fourier transform infrared spectrometer （FT- IR）, X-ray diffraction （XRD）, scanning electron microscopy （SEM）, thermogravimetric analysis （TGA） and alternating gradient magnetometer （AGM）. The results show that the NiFe204 particles have cubic spinel structure, the particle diameter is 10-80nm, saturation magnetization is 43. 3A · m2·kg-1. The magnetic N, O-carboxymethyl chitosan microspheres are spherical shape and have smooth surface, the diameter is about 6-25μm, mass fraction of NiFe2 04 nanoparticles in magnetic mi- crospheres is 35.6%, and the saturation magnetization is 14.3A ·m2 ·kg-1.

关 键 词：水热法 铁酸镍 N O-羧甲基壳聚糖 乳化交联法 磁性微球 NIFE2O4 

分 类 号：TB33[一般工业技术—材料科学与工程]