期刊
ACS OMEGA
卷 4, 期 1, 页码 509-517出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsomega.8b02866
关键词
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资金
- National Natural Science Foundation of China [21776186, 51533004, 51573147, 51673135]
- Youth Foundation of Science & Technology Department of Sichuan Province [2017JQ0017]
- Programme of Introducing Talents of Discipline to Universities [B13040]
- Fundamental Research Funds for the Central Universities [2012017yjsy102]
Regenerated cellulose (RC) films exhibit poor water barrier performance, which seriously restricts its applications. To address this issue, an impermeable and hydrophobic graphene oxide modified by chemically grafting octadecylamine (GO-ODA) was utilized to enhance the water vapor barrier performance of RC nanocomposite films. Compared to the neat RC film, more than 20% decrease in the coefficient of water vapor permeability (P-H2O) was achieved by loading only 2.0 wt % GO-ODA. The promising hydrophobicity of GO-ODA effectively retarded the formation of hydrogen bonding at the relatively weakened interface between GO and RC, compensating for the diffusion of water vapor molecules at the interface; on the other hand, the fully exfoliated GO-ODA nanosheets were inclined to align with the surface of the as-prepared RC nanocomposite films during hot-pressure drying, creating a much more tortuous pathway for diffusion of water molecules. The new insights could be valuable for widening application of cellulose such as packaging.
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