Effect of Chitosan Concentration on the Properties of the in-situ Nano SiOx Chitosan Coatings

被引：0
作者：
Yang L. [1 ]
Hao H. [1 ]
Zhang X. [1 ]
Sun T. [1 ]
机构：
[1] Food Safety Key Lab of Liaoning Province, Jinzhou, 121013, Liaoning
[2] National & Local Joint Engineering Research Center of Storage, Processing and Safety Control Technology for Fresh Agricultural and Aquatic Products, Jinzhou, 121013, Liaoning
[3] Hebei Huaqing Environmental Science and Technology Co., Ltd, Shijiazhuang
来源：
Journal of Chinese Institute of Food Science and Technology | 2019年 / 19卷 / 05期
关键词：
Chitosan; Coating; In-situ synthesis; Nano SiOx; Property;
D O I：
10.16429/j.1009-7848.2019.05.012
中图分类号：
学科分类号：
摘要：
The nano in-situ SiOx chitosan coatings were prepared from the various concentration of chitosan, and then characterized by XRD, FT-IR, SEM, and TEM. The effect of the chitosan concentration on the gas permeabilities, mechanical properties, preservation properties of the coatings was studied. The results show that the microstructure of the coating is affected by the concentration of the chitosan. Chemical bonds were formed between nano in-situ SiOx and chitosan. When the concentration of chitosan was 1.5 g/100 mL, the dehydration from chitosan coating is uniform in the process of flowing spread molding. The size of the nano in-situ SiOx is 8-15 nm, linked as chain, nearly no reunion and well dispersed. The coating is uniform, compact, and the large pores decreases and nearly no crack on the sections. With the increase of the concentration of the chitosan, the permeabilities of water vapor, CO2 and O2 are all increased, while the tensile strength enhances and the elongation at break decreases. The preservation results of the coatings with different chitosan concentrationon Sciaenops ocellatus at 4℃ demonstrate that the freshness of Sciaenops ocellatus are reduced with the storage duration. Meanwhile, the chitosan coatings could delay to decline the quality of Sciaenops ocellatus, and the chitosan concentration of 1.5 g/mL is the optimal. © 2019, Editorial Office of Journal of CIFST. All right reserved.
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页码：85 / 92
页数：7
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