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Coaxial electrospraying of biopolymers as a strategy to improve protection of bioactive food ingredients
Innovative Food Science & Emerging Technologies ( IF 6.6 ) Pub Date : 2018-03-27 , DOI: 10.1016/j.ifset.2018.03.023
Laura G. Gómez-Mascaraque , Fran Tordera , Maria Jose Fabra , Marta Martínez-Sanz , Amparo Lopez-Rubio

Coaxial electrospraying is a promising technique for the production of multilayer encapsulation structures whose potential has already been demonstrated for pharmaceutical and biomedical applications. The aim of this work was to extend its application to the food sector by developing novel coaxially electrosprayed microcapsules using all food-grade materials. For this purpose, zein and gelatin were used as shell biopolymers to microencapsulate two model bioactive ingredients, i.e. epigallocatechin gallate (EGCG) as a model hydrophilic compound and α-linolenic acid (ALA) as a model hydrophobic molecule. The performance of the coaxially-obtained particles in terms of protection was evaluated in comparison with that of uniaxially electrosprayed materials. Particle sizes varied with composition and encapsulation efficiency (EE) was dependent on the chemical affinity between the shell matrix and the bioactive compound, but in general, greater EE was obtained in the coaxial systems. Moreover, enhanced bioactive protection ability was demonstrated by the coaxial structures, as observed in thermal degradation assays (for ALA) and antioxidant activity after in-vitro digestion (for EGCG).

Industrial relevance

This work emphasizes the usefulness of the electrospraying technique for the production of encapsulation structures for bioactive protection using all food-grade materials, without the need of applying high temperatures and generating small capsule sizes (in the submicron range). It also demonstrates that the coaxial configuration may be used to design encapsulation systems with enhanced protection ability for both hydrophilic and hydrophobic bioactive compounds.



中文翻译:

同轴电喷涂生物聚合物作为改善对生物活性食品成分的保护的策略

同轴电喷雾技术是生产多层封装结构的一种有前途的技术,其潜力已在药物和生物医学应用中得到证明。这项工作的目的是通过使用所有食品级材料开发新型的同轴电喷雾微胶囊,将其应用扩展到食品领域。为此,将玉米醇溶蛋白和明胶用作壳生物聚合物,以微囊化两种模型生物活性成分,表没食子儿茶素没食子酸酯(EGCG)作为模型亲水性化合物,α-亚麻酸(ALA)作为模型疏水性分子。与单轴电喷涂材料相比,评估了同轴获得的颗粒在保护方面的性能。粒径随组成而变化,包封效率(EE)取决于壳基质和生物活性化合物之间的化学亲和力,但总的来说,在同轴系统中获得了更大的EE。此外,如在热降解试验中(对于ALA)和体外消化后的抗氧化活性(对于EGCG)所观察到的,同轴结构证明了增强的生物活性保护能力。

行业相关性

这项工作强调了电喷雾技术在使用所有食品级材料生产具有生物活性保护作用的封装结构中的有用性,而无需施加高温并产生较小的胶囊尺寸(亚微米范围)。它还证明同轴结构可用于设计对亲水性和疏水性生物活性化合物均具有增强保护能力的封装系统。

更新日期:2018-03-27
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