College of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China.
Sericultural & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences/Key Laboratory of Functional Foods, Ministry of Agriculture and Rural Affairs/Guangdong Key Laboratory of Agricultural Products Processing, Guangzhou 510610, China.
J Agric Food Chem. 2022 Jul 6;70(26):8052-8063. doi: 10.1021/acs.jafc.1c04865. Epub 2022 Jun 22.
Pickering stabilizers with additional antioxidant, photostabilizing, and metal-chelating properties are suitable for structuring multifunctional Pickering emulsion systems. Tannic acid (TA) is a potential material which when adsorbed onto the interface may impart antioxidant, UV-light-shielding, and chelating properties to Pickering stabilizers. Herein, we report a type of TA polyelectrolyte nanoparticles (NPs) fabricated following a complexation between TA and aminated sugar beet pectin (SBP-NH). This study is geared toward investigating the performance of TA/SBP-NH NPs in stabilizing Pickering emulsions and protecting β-carotene from degradation. TA/SBP-NH NPs formed under optimum conditions had a mean diameter of 82 nm with a sphere-like shape. Because of their favorable surface wettability (91.2°), TA/SBP-NH NPs promoted formation of the low-, medium-, and high-internal-phase Pickering emulsions (HIPEs) in an oil volume fraction (φ)-dependent manner; the TA/SBP-NH NP-stabilized HIPE demonstrated viscoelastic properties increasing with the increasing concentration () of nanoparticles. Due to the excellent storage stability and UV light-absorbing capacity, the photostability of β-carotene was significantly improved by a TA/SBP-NH NP-stabilized HIPE (φ = 0.75; = 3 mg/mL). Altogether, this study highlights that TA/SBP-NH NPs have potential applications in structuring Pickering emulsions with improved protective effects on loaded lipophilic compounds.
具有额外抗氧化、光稳定和金属螯合性能的 Pickering 稳定剂适合构建多功能 Pickering 乳液体系。单宁酸（TA）是一种潜在的材料，当吸附到界面上时，可能会赋予 Pickering 稳定剂抗氧化、防紫外线和螯合的特性。在此，我们报告了一种通过单宁酸与氨基化糖甜菜果胶（SBP-NH）之间的络合作用制备的 TA 聚电解质纳米颗粒（NPs）。本研究旨在研究 TA/SBP-NH NPs 在稳定 Pickering 乳液和保护 β-胡萝卜素免受降解方面的性能。在最佳条件下形成的 TA/SBP-NH NPs 的平均直径为 82nm，呈球形。由于其良好的表面润湿性（91.2°），TA/SBP-NH NPs 以油体积分数（φ）依赖的方式促进低、中、高内相 Pickering 乳液（HIPE）的形成；TA/SBP-NH NP 稳定的 HIPE 表现出随着纳米粒子浓度（）的增加而增加的粘弹性。由于出色的储存稳定性和光吸收能力，TA/SBP-NH NP 稳定的 HIPE（φ=0.75；=3mg/mL）显著提高了 β-胡萝卜素的光稳定性。总之，本研究强调了 TA/SBP-NH NPs 在构建具有改善负载疏水性化合物保护效果的 Pickering 乳液方面具有潜在的应用。
