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

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。

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.