One of the long-standing problems of the leather manufacturing industry is that tons of solid leather waste generated during production meet environmental standards. Among all these solid wastes, untanned trimming wastes are of primary interest because of their relative collagen content, and therefore, in this research, hide trimming wastes from tanneries were used to prepare biodegradable films. The SDS-PAGE results suggested that obtained collagen hydrolysate (CH) was in its natural molecular form. Chitosan nanoparticles (CSNPs) were synthesized by ionotropic gelation technique with chitosan (CS) and tripolyphosphate anions and used in the preparation of CS/CH/CSNPs films containing different concentrations of CSNPs. The incorporation of CSNPs in CS/CH films has positively improved the films' remarkable physical properties. The DSC result showed that CS/CH films incorporated with CSNPs had higher glass transition and melting temperature. As a result, it was determined that CS/CH/CSNPs nanocomposite films have a high potential in biodegradable film systems.

皮革制造行业长期存在的问题之一是生产过程中产生的大量固体皮革废料符合环保标准。在所有这些固体废物中，未经鞣制的修边废料因其相对的胶原含量而受到主要关注，因此，在本研究中，来自制革厂的生皮修边废料用于制备可生物降解的薄膜。SDS-PAGE结果表明获得的胶原水解物(CH)处于其天然分子形式。壳聚糖纳米粒子 (CSNPs) 是由壳聚糖 (CS) 和三聚磷酸根阴离子通过离子致凝胶化技术合成的，并用于制备含有不同浓度 CSNPs 的 CS/CH/CSNPs 薄膜。在 CS/CH 薄膜中加入 CSNPs 积极改善了薄膜的显着物理性能。DSC 结果表明，掺入 CSNPs 的 CS/CH 薄膜具有更高的玻璃化转变温度和熔化温度。结果表明，CS/CH/CSNPs 纳米复合薄膜在生物可降解薄膜系统中具有很高的潜力。