Abstract：
To expand the utilization of gelatin and pectin derived from agricultural by-products, the composite films composed of gelatin, citrus pectin, cellulose nanofibers (CNF), and polyhexamethylene biguanide hydrochloride (PHMB) were prepared through the solvent casting method. Fourier infrared spectroscopy analysis verified the successful integration of CNF and PHMB into the gelatin-pectin matrix. The incorporation of CNF as a reinforcing agent substantially enhanced the barrier capabilities of the composite film. Moreover, the addition of PHMB, functioning as an antimicrobial agent, not only granted the film with antibacterial properties but also improved its physical characteristics and biodegradability. A water contact angle experiment revealed the film presented a certain degree of hydrophobicity. The optimal performances were attained with a composition in which CNF and PHMB constituted 8 % and 3 %, respectively, of the total weight of gelatin and pectin. As a packaging film, the composite film demonstrated its effectiveness by reducing the decay index and weight loss rate of sweet cherries during a 12-day storage period. In the soil degradation test, the composite film exhibited notable structural degradation by the 16th day. Consequently, the composite film will be used as an innovative and biodegradable packaging material to provide a sustainable solution for food packaging industries.
摘要：
扩大农副产品中明胶和果胶的利用,由明胶组成的复合膜，柑橘果胶,纤维素纳米纤维(CNF),通过溶剂流延法制备了聚六亚甲基双胍盐酸盐（PHMB）。傅里叶红外光谱分析验证了CNF和PHMB成功整合到明胶-果胶基质中。CNF作为增强剂的掺入显著增强了复合膜的阻隔能力。此外，加上PHMB,作为抗菌剂，不仅使薄膜具有抗菌性能，而且还改善了其物理特性和生物降解性。水接触角实验表明该薄膜具有一定程度的疏水性。使用其中CNF和PHMB占8％和3％的组合物获得最佳性能，分别,明胶和果胶的总重量。作为一种包装薄膜，复合膜通过在12天的储存期内降低甜樱桃的腐烂指数和失重率证明了其有效性。在土壤退化试验中，到第16天，复合膜表现出明显的结构降解。因此,该复合膜将作为一种创新和可生物降解的包装材料，为食品包装行业提供可持续的解决方案。
