The wide availability of pollutant by-products from the leather industries has been a key factor in driving the research into converting these low-cost by-products into high value-added collagen-based products. In this study, collagen hydrolysate (CH) was extracted from hide trimming waste from the tanneries and used to prepare biodegradable films with chitosan nanoparticles (CNPs) with different concentrations to develop an alternative product to non-biodegradable plastics. The effects of CNPs concentration on the thickness, mechanical, water barrier, thermal, light transmittance, color properties, and opacity of CH-based films were investigated. The results clearly show that the tensile strength and elastic modulus values of CH/CNPs films increase significantly as the concentration of CNPs increases, while the elongation at break, water solubility, and water vapor permeability values decrease. In addition, scanning electron microscopy (SEM) showed uniform distributions of CNPs in the CH-based films. Based on the results obtained, the extraction of CH from hide trimming wastes and reuse in the production of biodegradable films will both prevent these valuable wastes from being dispose into the landfills and will be an alternative to fossil-derived plastics in the future.

皮革行业污染物副产物的广泛供应是推动将这些低成本副产物转化为高附加值胶原基产品的研究的关键因素。在这项研究中，从制革厂的皮革修整废料中提取胶原蛋白水解物（CH），并用于制备具有不同浓度的壳聚糖纳米颗粒（CNP）的可生物降解膜，从而开发出不可生物降解塑料的替代产品。研究了CNP浓度对CH基膜的厚度，机械性能，阻水性能，热，透光率，颜色特性和不透明度的影响。结果清楚地表明，随着CNPs浓度的增加，CH / CNPs薄膜的拉伸强度和弹性模量值显着增加，而断裂伸长率则增加。水溶性，水蒸气渗透率值降低。此外，扫描电子显微镜（SEM）显示了CHP膜中CNP的均匀分布。根据获得的结果，从皮革修整废物中提取CH并在可生物降解薄膜的生产中再利用，既可以防止将这些有价值的废物处置到垃圾填埋场中，也将在将来成为化石衍生塑料的替代品。