Łopusiewicz Łukasz, Kwiatkowski Paweł, Drozłowska Emilia, Trocer Paulina, Kostek Mateusz, Śliwiński Mariusz, Polak-Śliwińska Magdalena, Kowalczyk Edward, Sienkiewicz Monika
Center of Bioimmobilisation and Innovative Packaging Materials, Faculty of Food Sciences and Fisheries, West Pomeranian University of Technology Szczecin, Janickiego 35, 71-270 Szczecin, Poland.
Chair of Microbiology, Immunology and Laboratory Medicine, Department of Diagnostic Immunology, Pomeranian Medical University in Szczecin, Powstańców Wielkopolskich 72, 70-111 Szczecin, Poland.
Polymers (Basel). 2021 Feb 5;13(4):499. doi: 10.3390/polym13040499.
Preparation of biodegradable packaging materials and valorisation of food industry residues to achieve "zero waste" goals is still a major challenge. Herein, biopolymer-based (carboxymethyl cellulose-CMC) bioactive films were prepared by the addition, alone or in combination, of carvacrol and fungal melanin isolated from champignon mushroom () agro-industrial residues. The mechanical, optical, thermal, water vapour, and UV-Vis barrier properties were studied. Fourier-transform infrared (FT-IR) spectroscopy studies were carried out to analyse the chemical composition of the resulting films. Antibacterial, antifungal, and antioxidant activities were also determined. Both CMC/melanin and CMC/melanin/carvacrol films showed some antimicrobial activity against , , and . The addition of melanin increased the UV-blocking, mechanical, water vapour barrier, and antioxidant properties without substantially reducing the transparency of the films. The addition of carvacrol caused loss of transparency, however, composite CMC/melanin/carvacrol films showed excellent antioxidant activity and enhanced mechanical strength. The developed bioactive biopolymer films have a good potential to be green bioactive alternatives to plastic films in food packaging applications.
制备可生物降解的包装材料以及将食品工业残渣转化为有用物质以实现“零浪费”目标仍是一项重大挑战。在此，通过单独添加或组合添加香芹酚和从香菇农业工业残渣中分离出的真菌黑色素，制备了基于生物聚合物（羧甲基纤维素 - CMC）的生物活性薄膜。研究了其机械、光学、热、水蒸气和紫外 - 可见阻隔性能。进行了傅里叶变换红外（FT - IR）光谱研究以分析所得薄膜的化学成分。还测定了抗菌、抗真菌和抗氧化活性。CMC/黑色素和CMC/黑色素/香芹酚薄膜均对 、 和 表现出一定的抗菌活性。黑色素的添加增加了紫外线阻隔、机械、水蒸气阻隔和抗氧化性能，且没有大幅降低薄膜的透明度。香芹酚的添加导致透明度降低，然而，复合CMC/黑色素/香芹酚薄膜表现出优异的抗氧化活性和增强的机械强度。所开发的生物活性生物聚合物薄膜在食品包装应用中很有潜力成为塑料薄膜的绿色生物活性替代品。
