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Journal of Bioactive and Compatible Polymers
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Microwave-assisted Preparation of Magnetic Albumin Microspheres

Chang-Yun Chen

Department of Chemistry, Nanjing Xiaozhuang University, Beiwei Road 41, Nanjing 210017, People's Republic of China, yhjiangccy{at}126.com

Qi Long

Department of Chemistry, Nanjing Xiaozhuang University, Beiwei Road 41, Nanjing 210017, People's Republic of China

Xiao-Hua Li

Department of Engineering, Jiangsu Institue of Economic and Trade Technology, Nanjing, 210007, People's Republic of China

Jiao Xu

Coordination Chemistry Iinstitute and State Key Laboratory of Coordination Chemistry, Nanjing University, Hankou Road 22, Nanjing 210093 People's Republic of China

A new microwave-assisted method was used to prepare magnetic Fe3 O4 particles and magnetic bovine albumin microspheres. The microwave method produced smaller particles and is faster than traditional methods. The optimum conditions to prepare the Fe3O4 particles were three minutes at pH 13 and 80°C. Magnetic microspheres containing albumin were synthesized based on heating times and temperatures to form microspheres with different properties. For example, heating for 4min, at 160°C, yielded smaller sized microspheres (30 µm). Confirmed by XRD, SEM, and FT-IR that iron oxide particles were encapsulated in biocompatible proteins, The thermal stability of the microspheres were determined by DSC and TG. The magnetic properties were determined by UV—VIS spectraphotometry and a Guoy magnetic balance. This microwave process could become a preferred method for the synthesis of magnetized protein microspheres.

Key Words: microwave-assisted method • magnetic Fe3O4 particles • magnetic albumin microspheres • magnetic microsphere preparation • magnetic microsphere characterization.

Journal of Bioactive and Compatible Polymers, Vol. 23, No. 5, 490-500 (2008)
DOI: 10.1177/0883911508095370
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