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Hydrophobic Graphene Oxide as a Promising Barrier of Water Vapor for Regenerated Cellulose Nanocomposite Films
ACS Omega ( IF 3.7 ) Pub Date : 2019-01-08 00:00:00 , DOI: 10.1021/acsomega.8b02866 Ling Xu 1 , Jian Teng 1 , Lei Li 1 , Hua-Dong Huang 1 , Jia-Zhuang Xu 1 , Yue Li 1 , Peng-Gang Ren 2 , Gan-Ji Zhong 1 , Zhong-Ming Li 1
ACS Omega ( IF 3.7 ) Pub Date : 2019-01-08 00:00:00 , DOI: 10.1021/acsomega.8b02866 Ling Xu 1 , Jian Teng 1 , Lei Li 1 , Hua-Dong Huang 1 , Jia-Zhuang Xu 1 , Yue Li 1 , Peng-Gang Ren 2 , Gan-Ji Zhong 1 , Zhong-Ming Li 1
Affiliation
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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 (PH2O) 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.
中文翻译：
疏水性氧化石墨烯作为再生纤维素纳米复合薄膜水蒸气的有前途屏障
再生纤维素（RC）膜的阻水性能差，严重限制了其应用。为了解决这个问题，通过化学接枝十八烷基胺（GO-ODA）改性的不渗透性和疏水性氧化石墨烯被用来增强RC纳米复合膜的水蒸气阻隔性能。与纯RC膜相比，水蒸气透过率（P H 2 O通过仅加载2.0重量％的GO-ODA来实现）。GO-ODA有希望的疏水性有效地阻止了GO和RC之间相对较弱的界面上氢键的形成，从而补偿了水蒸气分子在界面上的扩散。另一方面，在热压干燥过程中，完全剥落的GO-ODA纳米片倾向于与制备好的RC纳米复合膜的表面对齐，从而为水分子的扩散创造了更为曲折的路径。这些新见解对于纤维素在包装等领域的广泛应用可能是有价值的。
更新日期：2019-01-08
中文翻译：
疏水性氧化石墨烯作为再生纤维素纳米复合薄膜水蒸气的有前途屏障
再生纤维素（RC）膜的阻水性能差，严重限制了其应用。为了解决这个问题，通过化学接枝十八烷基胺（GO-ODA）改性的不渗透性和疏水性氧化石墨烯被用来增强RC纳米复合膜的水蒸气阻隔性能。与纯RC膜相比，水蒸气透过率（P H 2 O通过仅加载2.0重量％的GO-ODA来实现）。GO-ODA有希望的疏水性有效地阻止了GO和RC之间相对较弱的界面上氢键的形成，从而补偿了水蒸气分子在界面上的扩散。另一方面，在热压干燥过程中，完全剥落的GO-ODA纳米片倾向于与制备好的RC纳米复合膜的表面对齐，从而为水分子的扩散创造了更为曲折的路径。这些新见解对于纤维素在包装等领域的广泛应用可能是有价值的。
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