单 位：
广东省水禽健康养殖重点实验室;仲恺农业工程学院化学化工学院广州市农用化学品高效利用重点实验室
摘 要：
为提高碘酸钙在饲料中的稳定性,以碘酸钙为芯材,海藻酸钠(Sodium alginate,SA)为壁材,纳米碳酸钙为交联剂,将碘酸钙分散于液体石蜡中,采用内源乳化法制备了碘酸钙/海藻酸钠凝胶微球.采用傅里叶红外光谱和扫描电子显微镜对碘酸钙/海藻酸钠凝胶微球进行了表征,并通过单因素法系统考察了碘酸钙/海藻酸钠凝胶微球制备工艺对其载药率和包封率的影响.结果表明,碘酸钙以晶体形式负载于碘酸钙/海藻酸钠凝胶微球上;在海藻酸钠质量浓度为12 g·L~(-1),纳米碳酸钙质量分数为SA的1/2,Span80质量分数为2%,酸钙物质的量比为6.9∶1,碘酸钙质量为1.2 g,油相搅拌速度500 r·min~(-1),油水体积比为3∶1,乳化30 min,富集90 min和交联25 min条件下工艺最优,其制备的碘酸钙/海藻酸钠凝胶微球载药率和包封率分别为41.0%和71.8%.
译 名：
Preparation of sodium alginate microspheres supported calcium iodate for feeds
作 者：
YANG Anyuan;ZHOU Hongjun;ZHOU Xinhua;SHU Xugang;Guangzhou Key Laboratory of Efficient Utilization of Agrochemicals,College of Chemistry and Chemical Engineering,Zhongkai University of Agriculture and Engineering;Guangdong Province Key Laboratory of Waterfowl Healthy Breeding;
关键词：
calcium iodate;;sodium alginate;;emulsification/internal gelation;;microspheres
摘 要：
In order to improve the stability of calcium iodate in feeds,Calcium iodate have been distributed into liquid paraffin at first,then the microsphere of calcium iodate(Ca(IO_3)_2/SA microsphere)were prepared by emulsification/internal gelation with sodium alginate as wall material and Nano-calcium carbonate as cross linker.The Ca(IO_3)_2/SA microspheres were characterized by FT-IR and SEM,and the influence of preparation conditions of Ca(IO_3)_2/SA microsphere on the loading content of calcium iodate(LC)and encapsulation efficiency(EE)was studied systematically by the single-factor method.The results showed that the loaded calcium iodate was loaded in crystalline form in microspheres.The optimized condition of preparation of Ca(IO_3)_2/SA microsphere were as follows:sodium alginate concentration12 g·L~(-1),Nano-calcium 1/2,Span80 2%,acid-calcium substance ratio 6.9∶1,calcium iodate mass1.2 g,oil phase stirring speed 500 r·min~(-1),oil-water volume ratio 3∶1,emulsification time 30 min,enrichment time 90 min,crosslinking time 25 min.The loading content(LC)and encapsulation efficiency(EE)of Ca(IO_3)_2/SA microsphere in the optimized condition were 41.0%and 71.8%,respectively.
