Patrón-Espá Anita, Martín-Esparza María Eugenia, Chiralt Amparo, González-Martínez Chelo
Instituto Universitario de Ingeniería de Alimentos-FoodUPV, Universitat Politècnica de València, Camí de Vera s/n, 46022 València, Spain.
Polymers (Basel). 2025 Apr 3;17(7):974. doi: 10.3390/polym17070974.
The use of agro-industrial residues in the development of packaging materials is a topic of interest from a sustainable perspective, as it promotes biodegradability, reduces production costs, and aligns with the concept of a circular economy. The aim of this work was to develop and characterize biodegradable composite films based on Poly 3-hydroxybutyrate-co-3-hydroxyvalerate (PHBV) and the tiger nut horchata solid residue (HSR) at different ratios. The obtained composites were evaluated as to their suitability as food active packaging materials in terms of microstructure, water content and solubility, mechanical, barrier and thermal properties, and total phenolic content and antioxidant capacity. The incorporation of HSR into the PHBV matrix led to more opaque, darker reddish films and promoted significant changes in their mechanical and barrier properties. Specifically, the composite films showed lower water vapor barrier capacity and reduced tensile strength (43-81% lower TS) and elongation at break (46-77% lower Ɛ values) while the rigidity increased or maintained when using up to 20% wt. of HSR. In contrast, the incorporation of the HSR provided the films with remarkable antioxidant capacity and effective light-blocking capacity, which could be of great interest for food preservation, as active packaging materials. The total phenol content of the composites increased in line with the increment of the HSR content, ranging from 9 to 34 mg GAE/100 g film.
从可持续发展的角度来看，在包装材料开发中使用农业工业残渣是一个备受关注的话题，因为它能促进生物降解性、降低生产成本，并符合循环经济的理念。这项工作的目的是开发并表征基于聚3-羟基丁酸酯- co - 3-羟基戊酸酯（PHBV）和不同比例的虎坚果奶固体残渣（HSR）的可生物降解复合薄膜。从微观结构、含水量和溶解性、机械性能、阻隔性能和热性能以及总酚含量和抗氧化能力等方面，对所得复合材料作为食品活性包装材料的适用性进行了评估。将HSR掺入PHBV基体中导致薄膜更不透明、呈更深的微红颜色，并使其机械性能和阻隔性能发生显著变化。具体而言，复合薄膜的水蒸气阻隔能力较低，拉伸强度降低（TS降低43 - 81%），断裂伸长率降低（Ɛ值降低46 - 77%），而在使用高达20%重量的HSR时，刚性增加或保持不变。相比之下，掺入HSR使薄膜具有显著的抗氧化能力和有效的遮光能力，作为活性包装材料，这对于食品保鲜可能具有重要意义。复合材料中的总酚含量随着HSR含量的增加而增加，范围为9至34 mg GAE/100 g薄膜。
