This study uses sunflower hulls, a by-product from the sunflower snack industry, to recover both, valuable phenolic compounds and cellulose fibers, for the production of antioxidant reinforced starch films as potential food packaging material. The phenolic extract provided antioxidant properties to the films with EC₅₀ values of 89 mg film/mg DPPH. The cellulose fibers reinforced the starch films with a threefold increase in Young´s modulus. Furthermore, citric acid was added to induce cross-linking of the starch polymers and improve film integrity. The addition of citric acid induced both, starch polymer hydrolysis and cross-linking, seen in a shift in chain-length distribution after debranching with iso-amylase. This is the first study that focuses on a three-principle approach to improve edible starch films, and follows UN goals on sustainability to reduce waste and increase value in by-products as a step forward to functionalize packaging material.

这项研究使用向日葵零食行业的副产品向日葵壳来回收有价值的酚类化合物和纤维素纤维，以生产抗氧化剂增强的淀粉薄膜作为潜在的食品包装材料。酚类提取物为EC ₅₀薄膜提供抗氧化性能值为89 mg薄膜/ mg DPPH。纤维素纤维增强了淀粉膜，使杨氏模量增加了三倍。此外，添加柠檬酸以诱导淀粉聚合物的交联并改善膜完整性。柠檬酸的添加诱导淀粉聚合物水解和交联，这在异淀粉酶脱支后链长分布的变化中可见。这是第一项针对三性原理以改善可食用淀粉薄膜的研究，并遵循联合国关于减少废物和增加副产品价值的可持续性目标，这是使包装材料功能化的一步。