高压静电喷雾法制备再生纤维素磁性微球

Preparation of Magnetic Regenerated Cellulose Microspheres via High voltage Electrospraying Method

中文关键词:  碱脲体系  高压静电喷雾  再生纤维素磁性微球  超顺磁性

Key Words:NaOH/Urea/H2O solvent system  high voltage electrospraying  magnetic cellulose microspheres  super paramagnetism

中文摘要:

      以Fe3O4纳米颗粒与纤维素碱脲溶液的混合液为原料，利用高压静电喷雾法制备了再生纤维素磁性微球（M RCMS）。探讨了Fe3O4负载量对M RCMS物理结构的影响，并用扫描电镜（SEM）、X射线衍射仪（XRD）、热重分析仪（TGA）、振动样品磁强计（VSM）和透射电镜（TEM）对产品进行表征。结果表明，随Fe3O4负载量的增加，高压静电喷雾过程中M RCMS的成球性、均一性、保水能力和孔隙结构变差，比表面积增大，但Fe3O4晶体结构和粒径未发生变化，M RCMS热稳定性良好并具备超顺磁性。

Abstract:

      Magnetic regenerated cellulose microspheres(M RCMS) were obtained from a mixture of Fe3O4 and cellulose in NaOH/urea aqueous solution via high voltage electrospraying method. The influences of the loading amounts of Fe3O4 on the process of electrospraying as well as the morphology and physical structure of M RCMS were studied. The products were investigated by means of scanning electron microscope(SEM), X ray diffractometer(XRD), thermogravimetric analysis(TGA), vibrating sample magnetometer(VSM) and transmission electron microscope(TEM). The balling ability, uniformity, water retention and pore structure of M RCMS became worse with the increasing of the amount of Fe3O4, but the specific surface area of M RCMS was larger. The crystal structure of Fe3O4 showed no changes during the process of loading. M RCMS had good thermal stability and super paramagnetism.