| 杨安源，胡恩烨，周红军，周新华，舒绪刚.内源乳化法制备亚硒酸钠 / 海藻酸钠微胶囊及其环境响应性[J].广东农业科学,2019,46(3):127-134 |
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内源乳化法制备亚硒酸钠 / 海藻酸钠微胶囊及其环境响应性 |
| Preparation of Sodium Selenite/Sodium Alginate Microcapsules by Endogenous Emulsion Method and Its Environmental responsiveness |
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| DOI：10.16768/j.issn.1004-874X.2019.03.020 |
| 中文关键词: 饲用硒营养剂 亚硒酸钠 海藻酸钠 微胶囊 溶胀动力学 环境响应性 |
| 英文关键词: dietary selenium nutritional agent sodium selenite sodium alginate microcapsules swelling dynamics environmental responsiveness |
| 基金项目:广州市科技计划项目（201604020054）；广东省科技计划项目（2017A040405055） |
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| 中文摘要: |
| 【目的】为提高亚硒酸钠的生物利用率，通过内源乳化法制备环境响应性亚硒酸钠 / 海藻酸钠微
胶囊（SSSAMC）。【方法】以天然高分子海藻酸钠（SA）为壁材、亚硒酸钠（Na2SeO3）为芯材、纳米碳酸钙
（Nano-CaCO3）为交联剂制备 SSSAMC。采用热重分析和扫描电镜与能谱扫描结合分析 SSSAMC 的热稳定性与
形貌。通过测定 SSSAMC 在不同 pH、温度以及离子浓度下的溶胀率，考察 SSSAMC 的环境响应性，并分析了
SSSAMC 溶胀率随时间变化的关系。【结果】该法制备的 SSSAMC 具有良好的热稳定性，兼具 pH、温度和离
子浓度响应性，其响应溶胀过程符合 Schott 溶胀模型，拟合相关系数 R2 在 0.99 以上。【结论】SSSAMC 兼具
良好的热稳定性和环境响应特性，具备作为肠道释放的饲用硒营养剂的应用潜力。 |
| 英文摘要: |
| 【Objective】This experiment was performed to improve the bioavailability of sodium selenite and
the environmental responsive sodium selenite/sodium alginate microcapsules (SSSAMC) were prepared by endogenous
emulsion method. 【Method】SSSAMC were prepared by using natural macromolecule sodium alginate (SA) as wall
material, sodium selenite (Na2SeO3) as core material and Nano-CaCO3 as cross-linking agent. The thermal stability
and morphology of SSSAMC were analyzed by TG and SEM&EDS. The environmental responsiveness of SSSAMC was
investigated by measuring the swelling ratio of SSSAMC at different pH, temperature and ion concentration, and the
relationship between the swelling degree of SSSAMC and time were analyzed. 【Result】The SSSAMC prepared by this
method got a remarkable thermal stability. At the same time, SSSAMC had the responsiveness of pH, temperature and ion
concentration. Its response swelling process conformed to Schott swelling model, and the correlation coefficient R2 was
over 0.99. 【Conclusion】The results indicated that SSSAMC had both excellent thermal stability and environmental
responsiveness and was expected to be a dietary selenium nutritional agent released by the intestinal tract. |
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