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投稿时间:2020-08-13
投稿时间:2020-08-13
中文摘要: 该文阐述Pickering乳状液的质构构建及稳定性影响因素,重点论述生物大分子固体颗粒的种类及其稳定Pickering乳状液的机理。高分子生物聚合物因具有低细胞毒性、易被降解、生物兼容性和利用率高的优点,成为食品领域制备Pickering乳状液固体颗粒的良好材料。蛋白质具有亲水-亲油的双亲结构特性,可以吸附在油-水界面上,降低界面的自由能,同时也能够在界面上形成一层厚的立体阻隔层,防止乳状液液滴的聚结从而稳定乳状液。多糖类包括淀粉、甲壳素以及一些纤维素及其衍生体,也可以用来制备固体颗粒稳定剂,但多糖类偏亲水,因此可以通过一定的改性,如接入疏水基团,使多糖在油-水界面上达到亲水-亲油平衡。另外多糖由于其带电性质,可以通过静电排斥作用,防止液滴的聚集,从而稳定乳状液。蛋白与小分子乳化剂、多糖与小分子乳化剂、蛋白质与多糖在一定的pH值、离子强度、温度等条件下产生协同增效作用,形成聚合体颗粒,也可有效地稳定Pickering乳状液。
中文关键词: 食品级 Pickering乳状液 稳定剂 生物大分子
Abstract:This paper evaluated Pickering emulsion texture construction,assesses factors influencing stability,and discussed a variety of solid particles drived from bio-macromolecules and their mechanism of stabilizing Pickering emulsions.Bio-macromolecules are a good source of food grade solid particles owing to their low cell toxicity,easy degradability,bioavailability,and high utilization ratio.Proteins with hydrophilic and hydrophobic characteristics can adsorb onto oil/water(O/W)interfaces and lower interface free energy.Proteins also sterically prevent direct contact between phases at the interface,preventing droplets from coalescencing.Polysaccharides with potential as Pickering emulsion stabilizers include starch,chitosan,cellulose and their derivatives,from which solid particles can be prepared.Polysaccharides are relatively hydrophilic,and can be modified by linking some hydrophobic groups to achieve hydrophilic/hydrophobic balance at the phase interface.Polysaccharides possessing the correct charge characteristics can also stabilize emulsions through electrostatic repulsion.Synergistic interactions occur between proteins and low-molecular weight emulsifiers,polysaccharides and low-molecular weight emulsifiers,and proteins and polysaccharides under certain pH,ion strength,and temperature conditions.Complexes formed by different molecules can also be used as solid particles to stabilize Pickering emulsions.
文章编号:202110033 中图分类号: 文献标志码:
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