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Preparation, physicochemical and preservation properties of Ti/ZnO/ in situ SiO x chitosan composite coatings
Author(s) -
Wei Xuqing,
Li Qiuying,
Hao Han,
Yang Hua,
Li Yingchang,
Sun Tong,
Li Xuepeng
Publication year - 2019
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.10048
Subject(s) - materials science , composite number , chemical engineering , nanoparticle , coating , chitosan , nanorod , in situ , nanomaterials , fourier transform infrared spectroscopy , biopolymer , nanotechnology , composite material , polymer , chemistry , organic chemistry , engineering
BACKGROUND Among nanomaterials, Ti and ZnO nanoparticles are often chosen as preservation materials because of their antibacterial properties. Chitosan, as a natural biopolymer, has potential because of its abundance, compatibility and antibacterial properties. To improve the physicochemical and preservation properties of in situ SiO x chitosan (CS) composite coating, Ti/ZnO/SiO x CS composite coatings were prepared with Ti‐doped ZnO (Ti/ZnO) nanorods and nanoballs. The composite coating structures were characterized by Fourier transform infrared, X‐ray diffraction and scanning electron microscopy, and their physicochemical and preservation properties were determined simultaneously. RESULTS The results show that the Ti/ZnO nanoparticles are beneficial to homogeneous dispersion of in situ synthesized nano SiO x in the CS coating, and that Ti/ZnO nanoballs have better dispersion than Ti/ZnO nanorods. Moreover, strong hydrogen bonds are formed among Ti/ZnO nanoparticles and in situ synthesized nano SiO x and CS molecules, and the primary structure of CS is disorganized. Thereby, the gas permeabilities and mechanical properties of the CS coatings are improved due to modification of Ti/ZnO nanoparticles, and the Ti/ZnO nanoballs/SiO x CS composite coating is optimal. The preservation properties of the CS coatings on Sciaenops ocellatus are significantly improved, and those of Ti/ZnO/ in situ SiO x CS composite coatings are superior. CONCLUSION The preservation properties of the CS composite coatings on S. ocellatus are significant, and the Ti/ZnO nanoballs/SiO x CS composite coating is even better. Therefore, the co‐modification method of in situ nanoparticles and antibacterial nanoparticles may be a promising method to improve the preservation properties of CS coatings. © 2019 Society of Chemical Industry