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投稿时间：2024-02-10
投稿时间：2024-02-10
中文摘要: 皮克林（Pickering）乳液是一种由固体颗粒代替传统乳化剂形成的新型乳液体系，具有稳定性强、对环境友好、安全性高等天然优势。以板栗淀粉为主要原料，对其进行辛烯基琥珀酸酯化（octenyl succinic anhydride，OSA）改性，制备OSA 改性板栗淀粉-表没食子儿茶素没食子酸酯（epigallocatechin gallate，EGCG）-Pickering 乳液，再通过对不同EGCG 添加量的乳液进行乳滴粒径、Zeta 电位测定、体外模拟消化以及稳定性分析，探究其在各消化阶段的水解程度和稳定性。结果表明：模拟体外消化结束后，乳液在口腔和胃部的Zeta 电位绝对值明显下降，在小肠内则有上升的趋势；稳定性分析表明：随着氯化钠浓度的增加，乳液的平均粒径逐渐增大；随pH 值的增加，乳液的平均粒径先减小后增大，在pH6.0 时达到最小。综上，通过将OSA 改性板栗淀粉-EGCG 纳米微粒应用于Pickering 乳液，可显著提高EGCG 的稳定性。
中文关键词: 板栗淀粉 OSA 改性 表没食子儿茶素没食子酸酯 Pickering 乳液 稳定性 体外模拟消化
Abstract:Pickering emulsion， a new type of emulsion system formed by solid particles instead of conventional emulsifier， is praised for strong stability， environmental friendliness， and high safety. Chestnut starch was modified by esterification with octenyl succinic anhydride （OSA） and used to prepare the OSA-modified chestnut starch-epigallocatechin gallate （EGCG）-Pickering emulsion. The emulsion samples prepared with different proportions of EGCG were then characterized in terms of the particle size， Zeta potential， and hydrolysis degree and stability in?in?vitro?simulated digestion. The results showed that after?in?vitro?digestion， the emulsion demonstrated decreased absolute Zeta potential in the mouth and stomach and increased absolute potential in the small intestine. With the increase in sodium chloride concentration， the average particle size of emulsion gradually increased. With the increases pH， the average particle size of emulsion first decreased and then increased， reaching the minimum at pH6.0. In conclusion， applying OSA-modified chestnut starch-EGCG nanoparticles to the Pickering emulsion significantly improved the stability of EGCG.
keywords: chestnut starch modification with octenyl succinic anhydride （OSA） epigallocatechin gallate Pickering emulsion stability simulated digestion in vitro
文章编号：202417008 中图分类号： 文献标志码：
基金项目:经济林木种质改良与资源综合利用湖北省重点实验室开放基金项目（202141304）；黄冈师范学院高级别培育项目（04201711903）
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