Effect of polyethyleneimine modified graphene on the mechanical and water vapor barrier properties of methyl cellulose composite films. (15th February 2018)

• Record Type: Journal Article
• Authors: Liu, Hongyu; Liu, Cuiyun; Peng, Shuge; Pan, Bingli; Lu, Chang
• Is Part Of: Carbohydrate polymers. Volume 182(2018)
• Page Start: 52
• Page End: 60
• Publication Date: 2018-02-15
• Subjects: Methyl cellulose -- Graphene -- Composites -- Mechanical property -- Water vapor permeability; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2017.11.008
• Languages: English
• ISSNs: 0144-8617

Abstract

Highlights: A series of novel MC composite films were prepared using PEI-RGO as an effective filler for water vapor barrier application. The MC/PEI-RGO composite films demonstrated superior mechanical and water vapor barrier performances. The PEI-RGO uniformly and aligned dispersed in the MC matrix. The synergistic effects of surface hydrophobicity and tortuous diffusion pathway were accounted for the improved water vapor barrier performance of the MC/PEI-RGO composite films. Abstract: 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 × 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.