Oxidized high-amylose starch as pickering stabilizer for oil-in-water emulsion and delivery of bioactive compound

IF 4.6 Q1 CHEMISTRY, APPLIED Food Hydrocolloids for Health Pub Date : 2022-12-01 DOI:10.1016/j.fhfh.2022.100104
Zhi-Hua Zhang, Zhi-Yu Gu, Meng-Fan Li, Shan Liang, Zhi Huang, Min-Hua Zong, Xiao-Ling Wu, Wen-Yong Lou
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引用次数: 1

Abstract

Polysaccharide based emulsions have received considerable attention due to their biodegradability, biocompatibility and food-safety. In this study, oxidized high-amylose starch (OHAS) is adopted for stabilization of oil-in-water (O/W) emulsion. Results showed that OHAS with oxidation degree of 90% (DO90-OHAS) exhibited higher wettability with three-phase contact angle of 70.6°. The obtained emulsion was stable within a wide range of different solution condition, with pH ranging from 3 to 7, salt concentration as high as 1.0 M and temperature ranging from -25 to 80 ℃. The gel-like network structure of DO90-OHAS effectively stabilized the emulsion and prevented the aggregation of oil droplets under different pH, as evidenced by confocal laser scanning microscopy (CLSM) observation. Furthermore, DO90-OHAS based emulsion prepared at different pH showed satisfactory long-term storage stability (up to 30 days). The fabricated emulsion was utilized for encapsulation of hydrophobic bioactive substances, with ∼72.5% encapsulation efficiency for β-carotene. The DO90-OHAS based emulsion enabled the controlled-release of β-carotene in vitro, with antioxidant activity maintained ∼50% of initial activity when exposed to elevated temperature (80°C). This research may provide a new avenue for OHAS based Pickering emulsions preparation and bioactive components delivery.

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氧化高直链淀粉作为水包油乳剂的酸洗稳定剂及生物活性化合物的输送
多糖基乳剂因其生物可降解性、生物相容性和食品安全性而受到广泛关注。本研究采用氧化高直链淀粉(OHAS)稳定水包油(O/W)乳液。结果表明,氧化度为90%的OHAS (DO90-OHAS)具有较高的润湿性,三相接触角为70.6°。在pH为3 ~ 7、盐浓度为1.0 M、温度为-25 ~ 80℃的不同溶液条件下,所制得的乳状液具有较好的稳定性。共聚焦激光扫描显微镜(CLSM)观察表明,DO90-OHAS的凝胶状网络结构在不同pH下都能有效地稳定乳液,防止油滴聚集。此外,在不同pH下制备的DO90-OHAS基乳液表现出令人满意的长期储存稳定性(长达30天)。制备的乳液用于疏水生物活性物质的包封,β-胡萝卜素包封率为~ 72.5%。基于DO90-OHAS的乳液能够在体外控制β-胡萝卜素的释放,当暴露于高温(80℃)时,其抗氧化活性保持在初始活性的50%左右。本研究为OHAS基皮克林乳剂的制备及生物活性成分的传递提供了新的途径。
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CiteScore
4.50
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审稿时长
61 days
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