Department of Chemistry, University of Calicut, Malappuram, Kerala 673635, India.
Department of Chemistry, University of Calicut, Malappuram, Kerala 673635, India.
Int J Biol Macromol. 2017 Apr;97:382-391. doi: 10.1016/j.ijbiomac.2017.01.052. Epub 2017 Jan 16.
As a breakthrough to open up the industrial use of novel environmentally benign packaging material, we propose the first report on portable chitosan-ZnO nano-composite pouches that will serve as elite entrants in smart packaging. A facile, one pot procedure was adopted for the preparation of the C-ZnC films. In order to tune the property of C-ZnC films, four different composite films were prepared by varying the concentration of ZnO. The prepared films were found to be much superior when compared to bare chitosan and other conventional films. Two bacterial strains that commonly contaminate in packed meat were selected as target microbes to elucidate the antimicrobial activity of the prepared C-ZnO film. Detailed investigations revealed that the antimicrobial efficiency is linearly related to the amount of ZnO nano-particles in the composite. The C-2 films exhibited excellent antimicrobial activity and was fabricated into packaging pouches for raw meat. The prepared pouches showed significant action against the microbes in raw meat owing to its complete inhibition of microbial growth on the sixth day of storage at 4°C. The C-2 pouches stand as a top-notch material when compared to polyethylene bag in extending the shelf life of raw meat.
作为开辟新型环保包装材料工业应用的突破点，我们首次提出了便携式壳聚糖-ZnO 纳米复合材料袋的报告，该材料将成为智能包装的佼佼者。采用简便的一锅法制备 C-ZnC 薄膜。为了调整 C-ZnC 薄膜的性能，通过改变 ZnO 的浓度制备了四种不同的复合薄膜。与壳聚糖和其他传统薄膜相比，所制备的薄膜具有明显的优势。选择两种常见污染包装肉的细菌菌株作为目标微生物，以阐明所制备的 C-ZnO 薄膜的抗菌活性。详细的研究表明，抗菌效率与复合材料中 ZnO 纳米粒子的数量呈线性关系。C-2 薄膜表现出优异的抗菌活性，并被制成生肉包装袋。由于在 4°C 下储存的第六天完全抑制了微生物的生长，因此所制备的包装袋对生肉中的微生物表现出显著的作用。与聚乙烯袋相比，C-2 袋在延长生肉的保质期方面表现出色。
