کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
603759 | 880254 | 2016 | 9 صفحه PDF | دانلود رایگان |
• In-situ synthesis method is conducive to nano SiOx dispersion in the coatings.
• The physicochemical and mechanical properties of the coatings is improved by nano SiOx.
• The hydrogen-bonds are strong, and original structures of the chitosan are disorganized.
• The chitosan structure in CO bond and amideⅡ are slightly affected by in situ synthesized nano SiOx.
• The preservation properties on the Sciaenops ocellatus are improved.
The chitosan coatings modified with the in situ synthesized nano SiOx were prepared and characterized, and the gas permeabilities and mechanical properties of the chitosan coatings were measured simultaneously. The SiOx dosage affects the micro morphology and microstructure of the chitosan coatings. The results show that in-situ synthesis method is conducive to nano SiOx dispersion. In the coatings, the particles size and amount are increased with nano SiOx dosage, and serious particles aggregation and coarse cross section are presented at nano SiOx dosage of 0.07%. Moreover, the strong hydrogen-bonds are formed between nano SiOx and chitosan molecule, and original structures of the chitosan are disorganized. The nano SiOx connect with chitosan with chemical bonds, and the chitosan structure in CO bond and amideⅡ are slightly affected. The gas permeabilities and mechanical properties of the coatings are affected by the dosage of nano SiOx, and the optimal nano SiOx dosage is 0.03%. The preservation properties of the chitosan coatings on the Sciaenops ocellatus are remarkable, and that of in situ synthesis nano SiOx chitosan coatings is more superior. Therefore, the chitosan coatings modified by in situ synthesized method may be a promising method to improve the preservation properties of the chitosan coatings.
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Journal: Food Hydrocolloids - Volume 54, Part A, March 2016, Pages 130–138