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2010•Journal of Jiaying UniversityRequires access

The Preparation and Characterisation of the Chitosan Magnetic Microspheres

Jie Yang

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Abstract

To prepare the Fe3O4 magnetic microspheres with chemical coprecipitation method,the chitosan was used as the dispersant and summarized the optimum preparation conditions.The initial concentration of Fe3+ was 0.15mol/L,where the mole ratio of Fe3+/Fe2+was 1.70-1.75;The precipitant,25% NH3H2O was used 20-30% excessively under pH=9-11,35℃ and with a stirrer speed of 3000r/min for 60min;As dispersant,the optimum dosage of chitosan was 0.0400g each 60mL responding liquid under 50℃ and pH=1.0.No apparent lamination of the chitosan magnetic microspheres had arisen under the above condition after being placed for 17 months.Chitosan magnetic microspheres were characterized by IR,TG-DTA and UV-visible spectrophotometry,etc.

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What this paper is about

To prepare the Fe3O4 magnetic microspheres with chemical coprecipitation method,the chitosan was used as the dispersant and summarized the optimum preparation conditions.The initial concentration of Fe3+ was 0.15mol/L,where the mole ratio of Fe3+/Fe2+was 1.70-1.75;The precipitant,25% NH3H2O was used 20-30% excessively under pH=9-11,35℃ and with a stirrer speed of 3000r/min for 60min;As dispersant,the optimum dosage of chitosan was 0.0400g each 60mL responding liquid under 50℃ and pH=1.0.No apparent lamination of the chitosan magnetic microspheres had arisen under the above condition after being placed for 17 months.Chitosan magnetic microspheres were characterized by IR,TG-DTA and UV-visible spectrophotometry,etc.

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Available abstract

To prepare the Fe3O4 magnetic microspheres with chemical coprecipitation method,the chitosan was used as the dispersant and summarized the optimum preparation conditions.The initial concentration of Fe3+ was 0.15mol/L,where the mole ratio of Fe3+/Fe2+was 1.70-1.75;The precipitant,25% NH3H2O was used 20-30% excessively under pH=9-11,35℃ and with a stirrer speed of 3000r/min for 60min;As dispersant,the optimum dosage of chitosan was 0.0400g each 60mL responding liquid under 50℃ and pH=1.0.No apparent lamination of the chitosan magnetic microspheres had arisen under the above condition after being placed for 17 months.Chitosan magnetic microspheres were characterized by IR,TG-DTA and UV-visible spectrophotometry,etc.

Key concepts: Chitosan, Dispersant, Coprecipitation, Microsphere, Nuclear chemistry, Materials science, Spectrophotometry, Chemistry

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