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第 36 卷第 1 期 精 细 化 工 Vol.36, No.1
201 9 年 1 月 FINE CHEMICALS Jan. 2019

食品与饲料用化学品
饲用碘酸钙/海藻酸钠微胶囊的制备及其稳定性

1
杨安源 ，周红军 1,2 ，周新华 1,2* ，舒绪刚 1,2
（1. 仲恺农业工程学院 化学化工学院，广东 广州 510225；2. 广东省普通高校农用绿色精细化学品重点
实验室，广东 广州 510225）

摘要：为隔绝饲用碘酸钙〔Ca(IO 3 ) 2 〕在贮存过程中与还原性物质，如维生素 C（V C ）的反应，以 Ca(IO 3 ) 2 为芯
材，海藻酸钠（SA）为壁材，纳米碳酸钙（Nano-CaCO 3 ）为交联钙源，采用改良的内源乳化法制备了碘酸钙/
海藻酸钠微胶囊（CISAMC）。利用 FTIR、SEM、TG、XRD 对其进行了结构表征，同时测定了其在 V C 水溶液
中的稳定性，探讨了 CISAMC 的形成机制。结果表明，CISAMC 呈球形，粒径约为 10~40 μm，表面有大量 Ca(IO 3 ) 2
晶体。Ca(IO 3 ) 2 和 CISAMC 在 V C 水溶液中 V C 分解 50%用时（t 50% ）分别为 54.8 和 78.3 min，CISAMC 使 Ca(IO 3 ) 2
在饲料中的稳定性得到明显提升。
关键词：碘酸钙；海藻酸钠；微胶囊；稳定性；饲料用化学品
中图分类号：S816.72 文献标识码：A 文章编号：1003-5214 (2019) 01-0124-05

Preparation and Stability of Calcium Iodate/Sodium Alginate
Microcapsules for Feeds

1,2
1,2
1
YANG An-yuan , ZHOU Hong-jun , ZHOU Xin-hua 1,2* , SHU Xu-gang
（1. College of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou
510225, Guangdong, China; 2. Key Laboratory of Agricultural Green Fine Chemicals of Guangdong Higher Education
Institution,Zhongkai University of Agriculture and Engineering, Guangzhou 510225, Guangdong,China）

Abstract: To avoid the reaction of calcium iodate 〔Ca(IO 3) 2〕 with reducing substances, such as vitamin C
(V C) 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 (t 50%) 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(IO 3) 2 in feeds.
Key words: calcium iodate; sodium alginate; microcapsules; stability; feed chemicals
Foundation items: Science and Technology Program of Guangzhou City (201604020054); Science and
Technology Program of Guangdong Province (2017A040405055)

[3]
–
碘是参与人和动物机体代谢的必需微量元素之 反应 ，生成 I 2 或者 I ，使 Ca(IO 3 ) 2 中碘元素在饲
一 [1-2] ,在禽畜饲料中添加适量补碘剂是养殖行业中 料生产、贮藏、运输等过程中严重流失，难以控制
预防禽畜缺碘的常用手段。Ca(IO 3 ) 2 作为一种安全 Ca(IO 3 ) 2 用量及其摄入量。同时，碘酸钙与还原性
性较高的补碘剂，被广泛添加到饲料中。但 Ca(IO 3 ) 2 物质反应会对饲料品质和动物对营养物质的吸收效
[4]
具有较强氧化性，可与饲料中还原性物质，如 V C 率等产生潜在的不良影响 。目前，研究者对提高

收稿日期：2018-03-14; 定用日期：2018-08-14; DOI: 10.13550/j.jxhg.20180168
基金项目：广州市科技计划项目（201604020054）；广东省科技计划项目（2017A040405055）
作者简介：杨安源（1992—），男，硕士生。联系人：周新华（1974—），男，教授，硕士生导师，E-mail：cexinhuazhou@163.com。