Preparation and Stability of Calcium Iodate/Sodium Alginate Microcapsules for Feeds
To avoid the reaction of calcium iodate 〔Ca(IO3)2〕 with reducing substances, such as vitamin C (VC) during storage in feeds, the microcapsules of calcium iodate (CISAMC) were prepared by improved emulsification/internal gelation with calcium iodate as core material, sodium alginate as wall material and nano-calcium carbonate as cross linker. The microcapsules were characterized by FTIR, SEM, TG and XRD. Its stability in Vc aqueous solution was also systematically measured. The embedding mechanism of CISAMC was proposed according to various analysis results. The results showed that the obtained CISAMC were spherical with a particle size of 10～40 μm and there were a large number of calcium iodate crystals on the surface of CISAMC.The half decomposition ratio time (t50％) of vitamin C by calcium iodate or CISAMC were 54.8 min and 78.3 min, respectively. It was found that CISAMC could significantly improve the stability of Ca(IO3)2 in feeds.
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万方数据
维普
