A facile route to synthesize porous ethyl cellulose spheres loaded with superparamagnetic iron oxide nanoparticles

作者：Yang, Hui; Xie, Yuan; Han, Daxin; Mao, Wenqi; Cai, Weiwei; Guo, Xingzhong^*

来源：Colloid and Polymer Science, 2015, 293(7): 1915-1922.

DOI：10.1007/s00396-015-3584-x

• Ethyl cellulose (EC)
• Porous spheres
• Emulsion
• Magnetic property
• Phase separation

Ethyl cellulose porous spheres (ECPSs) loaded with superparamagnetic iron oxide nanoparticles (SPIONs) have been successfully synthesized via a physical method in oil-in-water (O/W) emulsion. The as-prepared ECPSs possess open pores in the shell and interconnected pores inside the spheres by means of phase separation. The SPIONs with an average size of around 5 nm synthesized by co-precipitation method are added into oil phase precursor in the preparation of ECPSs to synthesize the ECPSs-SPIONs. The loading of SPIONs does not change the morphology of ECPSs, while endows the ECPSs with high ferromagnetic properties at room temperature. The resultant ECPSs-SPIONs can be easily separated from dispersion liquid or driven to specific sites under an external magnet.

• 出版日期2015-7
• 单位浙江大学