Journal ArticleDOI
Layer-by-layer assembled polyelectrolyte-decorated graphene multilayer film for hydrogen gas barrier application
Hongyu Liu,Hongyu Liu,Parthasarathi Bandyopadhyay,Tolendra Kshetri,Nam Hoon Kim,Bon-Cheol Ku,Bongho Moon,Joong Hee Lee +7 more
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TLDR
A facile approach for the fabrication of chemically modified reduced graphene oxide (RGO) based multilayer films was developed for gas barrier applications in this article, where polyethyleneimine (PEI) and poly(sodium 4-styrenesulfonate) (PSS) were utilized as surface modifiers to yield water-dispersible RGO with opposite charges.Abstract:
A facile approach for the fabrication of chemically-modified reduced graphene oxide (RGO) based multilayer films was developed for gas barrier applications. Polyethyleneimine (PEI) and poly(sodium 4-styrenesulfonate) (PSS) were utilized as surface modifiers to yield water-dispersible RGO with opposite charges. Altering the deposition pH of PEI-RGO layer resulted in different phase morphology and bonding of the multilayer films. PEI-RGO and PSS-RGO were assembled into multilayer films via a layer-by-layer (LbL) assembly method through electrostatic and hydrogen bonding interactions, respectively. The LBL assembly of polymer-decorated RGO based multilayer films were characterized by various characterization techniques. Hydrogen gas transmission rate (H2GTR) of the hydrogen bonding interaction based LbL film with 24 bilayers was 5.8 cc/m2·d·atm; and H2GTR value was 46.2 cc/m2·d·atm for the corresponding LbL film based on electrostatic interactions. Hydrogen bonding interaction based multilayer films exhibited very low H2GTR values compared to electrostatic interaction based multilayer and bare polyethylene terephthalate films.read more
Citations
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Atomistic modeling of graphene/hexagonal boron nitride polymer nanocomposites: a review
TL;DR: In this article, different types of interatomic potentials can be used for the modeling of graphene, hexagonal boron nitride (h-BN) and corresponding nanocomposites, and further elaborates on developments and challenges associated with the classical mechanics-based approach along with synergic effects of these nano reinforcements on host polymer matrix.
Journal ArticleDOI
Graphene Oxide Reinforced Alginate/PVA Double Network Hydrogels for Efficient Dye Removal
TL;DR: Results indicated that the hydrogels exhibited typical 3D porous structures and had an efficient adsorption effect towards MB due to strong interactions between DN hydrogel and MB molecules.
Journal ArticleDOI
Effect of polyethyleneimine modified graphene on the mechanical and water vapor barrier properties of methyl cellulose composite films.
TL;DR: 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.
Journal ArticleDOI
Advances in barrier coatings and film technologies for achieving sustainable packaging of food products – A review
TL;DR: In this article, a review highlights an ongoing shift of barrier coatings from traditional synthetic polymers to sustainable breakthrough materials for paper-based packaging and films, highlighting the implications of selecting different materials and processing options.
Journal ArticleDOI
Effects of hydrazine reduced graphene oxide on the inter-laminar fracture toughness of woven carbon fiber/epoxy composite
Nitai Chandra Adak,Nitai Chandra Adak,Suman Chhetri,Suman Chhetri,Tapas Kuila,Tapas Kuila,Naresh Chandra Murmu,Pranab Samanta,Pranab Samanta,Joong Hee Lee +9 more
TL;DR: In this article, the hybridization effects of hydrazine reduced graphene oxide (rGO) on the inter-laminar shear strength (ILSS), impact strength, and in-plane fracture toughness of symmetric type carbon fiber/epoxy composite laminates were investigated.
References
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Journal ArticleDOI
Flexible Graphene Films via the Filtration of Water-Soluble Noncovalent Functionalized Graphene Sheets
TL;DR: The work presented here will not only open a new way for preparing water-soluble graphene dispersions but also provide a general route for fabricating conducting films based on graphene.
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Graphene oxide dispersions in organic solvents.
TL;DR: In all of these solvents, full exfoliation of the graphite oxide material into individual, single-layer graphene oxide sheets was achieved by sonication, and graphene oxide dispersions exhibited long-term stability and were made of sheets between a few hundred nanometers and a few micrometers large.
Journal ArticleDOI
Stable aqueous dispersions of graphitic nanoplatelets via the reduction of exfoliated graphite oxide in the presence of poly(sodium 4-styrenesulfonate)
TL;DR: In this article, stable aqueous dispersions of polymer-coated graphitic nanoplatelets can be prepared via an exfoliation/in-situ reduction of graphite oxide in the presence of poly(sodium 4-styrenesulfonate).
Journal ArticleDOI
Graphene based new energy materials
Yiqing Sun,Qiong Wu,Gaoquan Shi +2 more
TL;DR: Graphene, a one-atom layer of graphite, possesses a unique two-dimensional (2D) structure, high conductivity and charge carrier mobility, huge specific surface area, high transparency and great mechanical strength as mentioned in this paper.