Journal
CARBOHYDRATE POLYMERS
Volume 182, Issue -, Pages 52-60Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2017.11.008
Keywords
Methyl cellulose; Graphene; Composites; Mechanical property; Water vapor permeability
Categories
Funding
- HAUST [13480051]
- National Natural Science Foundation of China [51675162, 51673059]
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A series of novel methyl cellulose (MC) composite films were prepared using polyethyleneimine reduced graphene oxide (PEI-RGO) as an effective filler for water vapor barrier application. The as-prepared PEI-RGO/MC composites were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis, tensile test and scanning electron microscopy. The experimental and theoretical results exhibited that PEI-RGO was uniformly dispersed in the MC matrix without aggregation and formed an aligned dispersion. The addition of PEI-RGO resulted in an enhanced surface hydrophobicity and a tortuous diffusion pathway for water molecules. Water vapor permeability of PEI-RGO/MC with loading of 3.0% of surface modified graphene was as low as 5.98 x 10(-11) g m m(-2) s(-1) Pa-1. The synergistic effects of enhanced surface hydrophobicity and tortuous diffusion pathway were accounted for the improved water vapor barrier performance of the PEI-RGO/MC composite films.
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