期刊
NANOSCALE
卷 11, 期 15, 页码 7424-7432出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8nr10435b
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资金
- Program of Shanghai Academic Research Leader [19XD1401400]
- National Natural Science Foundation of China [51673063, 21878092, 21838003, 91834301]
- Shanghai Scientific and Technological Innovation Project [18JC1410500]
- Social Development Program of Shanghai [17DZ1200900, 18DZ2252400]
- Innovation Program of Shanghai Municipal Education Commission
- Fundamental Research Funds for the Central Universities [222201718002]
High-performance packaging materials featuring a superior gas barrier and UV resistance as well as excellent mechanical properties are highly desirable but are still encountering serious challenges in the food, pharmaceutical and electronic industries. Here, a multifunctional film based on a modified titanium dioxide@graphene oxide/poly(vinyl alcohol) (TiO2@GO/PVA) nanocomposite with a multilayer nano-brick wall structure is rationally designed and fabricated by a facile solution casting approach. The modified TiO2 nanoparticles, assembled on the surface and edges of GO, are employed as bridges to construct the GO edge-to-edge alignment. Then, they tightly combine with PVA chains, acting as the mortar, to form a multilayer compact film. Therefore, the oxygen permeability of the nanocomposite film decreases to 0.119 x 10(-17) cm(3)cm (cm(2)sPa)(-1) with the addition of 1.0 wt% GO and 1.2 wt% modified TiO2, reduced by 93% compared with pure PVA film. More impressively, it is increased by only 5.9% after 9 h of ultraviolet light irradiation, which shows its exceptional UV resistance ability. In addition, the mechanical performance, thermal stability and water resistance are substantially improved. The developed modified TiO2@GO/PVA nanocomposite films with outstanding performance can be perceived as a green biodegradable material for a wide range of packaging industries.
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