功能化脲醛树脂磁性荧光微球的制备及表征  

Preparation and Characterization of Functional Magnetic Fluorescent Microspheres of Urea Formaldehyde

作　　者：刘清浩[1] 时国庆[2] 郭金春[1] 张银秋[1] 弓亚琼[1] 刘红彦[3] 陈立功[4] 

机构地区：[1]中北大学化工与环境学院,山西太原030051 [2]郑州轻工业学院食品与生物工程学院,河南郑州450002 [3]河南省农业科学院植物保护研究所,河南郑州450002 [4]天津大学化工学院,天津300072

出　　处：《高分子材料科学与工程》2016年第11期168-172,177,共6页Polymer Materials Science & Engineering

基　　金：2015校学科研究基金项目(110246);国家自然科学基金资助项目(21501155)

摘　　要：采用化学共沉淀法制备了磁性纳米粒子Fe_3O_4,并合成出水溶性好的5(6)-羧基罗丹明衍生物。以5(6)-羧基罗丹明衍生物为荧光染料,尿素、甲醛为单体,硝酸为引发剂,Fe3O4为核,水为分散介质,制备了脲醛树脂磁性荧光微球,并通过溶胶-凝胶法在其表面引入硅羟基。用扫描电子显微镜、荧光显微镜、傅里叶变换红外光谱仪、X射线衍射仪、振动样品磁强计、热失重分析仪、荧光分光光度计对磁性荧光微球的结构形貌及磁性荧光性能进行了表征。结果表明,所制备的脲醛树脂磁性荧光微球具有良好的单分散性,粒径分布窄,荧光性能好且稳定,具有超顺磁性且磁响应性强;在微球表面成功引入了硅羟基;分散在乙醇或水中的磁性荧光微球的荧光发射光谱相对于5(6)-羧基罗丹明衍生物发生了红移。Superparamagnetic Fe304 nanopartides were prepared by chemical coprecipitation method, and 5 （6）- earboxylrhodamine derivative with good water solubility was synthesized. Magnetic fluorescent microspheres of urea formaldehyde were prepared using 5 （6）-carboxylrhodamine derivative as fluoresent dye, urea and formaldehyde as monomer, nitrate as initiator, Fe304 nanoparticles as core, water as dispersion media. And then magnetic fluorescent microspheres of urea formaldehyde were coated with Si-OH groups through sol-gel method. The structure, morphology, magnetic and fluorescent properties of these hydroxy magnetic fluorescent microspheres were characterized by Fourier transform infrared spectrometer （FT-IR）, scanning electron microscopy （SEM）, fluorescence microscopy, X-ray diffraetometry （XRD）, vibrating sample magnetometry （VSM）, thermo-gravimetric analysis （TGA） and fluorescence spectrophotometry. The results indicate that hydroxy magnetic fluorescent microspheres are obtained with good dispersion, narrow particle size, stable and good fluorescence intensity, superpararnagnetism and good magnetic responsiveness. And hydroxy groups were successfully introduced on the surface. The fluorescent spectra of hydroxy magnetic fluorescent microspheres in ethanol or in water have an extent of red＇ shift corresponding to 5（6）-carboxylrhodamine derivative.

关 键 词：磁性纳米粒子 5(6)-羧基罗丹明衍生物 羟基脲醛树脂磁性荧光微球 

分 类 号：TQ324.8[化学工程—合成树脂塑料工业]