Preparation of functionalized MXene-stitched-graphene oxide/poly (ethylene-co-acrylic acid) nanocomposite with enhanced hydrogen gas barrier properties

Seo, Ok Beom; Saha, Subhabrata; Kim, Nam Hoon; Lee, Joong Hee

doi:10.1016/j.memsci.2021.119839

Cited by 51 publications

(21 citation statements)

References 57 publications

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“…2f). 18,52,53 Further, note that the intensity of C–O at 286.5 eV was reduced, while the peak representing O–CO completely disappeared. This observation suggested the simultaneous reduction of GO, and grafting of APTES, which primarily occurred through the amide bond formation.…”

Section: Resultsmentioning

confidence: 96%

“…14 Hence, both strength and flexibility are required to prevent microcracking at high pressure. Several polymers, such as thermoplastic polyurethane (TPU), 15 maleic anhydride grafted polypropylene, 16 polyvinyl alcohol, 17 ethylene acrylic acid copolymer, 18 etc. have been studied for H 2 gas barrier coating in combination with high aspect ratio nanofillers.…”

Section: Introductionmentioning

confidence: 99%

“…To ensure high reaction efficacy between the amine group of aminosilane and carboxyl surface functional groups of GO, the carbodiimide reaction would be promising. 18,36 In addition, the amine group would also facilitate the reduction of GO, 15 and the amide linkage, as formed by the carbodiimide reaction, is expected to delineate a strong attachment between the coating layer and the nylon 6 substrate.…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of impermeable dense architecture containing covalently stitched graphene oxide/boron nitride hybrid nanofiller reinforced semi-interpenetrating network for hydrogen gas barrier applications

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Section: Resultsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fabrication of impermeable dense architecture containing covalently stitched graphene oxide/boron nitride hybrid nanofiller reinforced semi-interpenetrating network for hydrogen gas barrier applications

et al. 2022

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“…In essence, the study revealed that dopamine modified GO or other high aspect ratio nanofiller would be promising for aircrafts and food packaging. Seo and Saha, 2021.…”

Section: Discussionmentioning

confidence: 99%

“…Seo crosslinked MXene and GO through 3aminopropyl triethoxysilane (APTES) by employing carbodiimide reaction. The 10 wt% f-MXene-GO/EAA coated layer showed a very low H 2 permeability coefficient (0.03 cc.mm.m −2 .d −1 .atm −1 ) and a significant 89% reduction in the H 2 gas transmission rate with respect to nylon 6 (Seo, et al, 2021).…”

Section: Introductionmentioning

confidence: 98%

Preparation of graphene oxide/ waterborne polyurethane via boric acid cross-linked dopamine enhanced barrier and mechanical properties

et al. 2022

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Herein, a simple and efficient strategy was proposed to improve the gas barrier properties of waterborne polyurethane (WPU). Graphene oxide was first modified with dopamine and then cross-linked by boric acid (BA) to bring the graphene sheets closer together, thereby increasing the complexity of the gas pathway. FTIR, XPS, and SEM analyses proved that boric acid was uniformly dispersed into WPU, meanwhile, SEM images demonstrated the defects between the composites that were filled by the boric acid network. In addition, the mechanical properties of the composite were also enhanced. The tensile strength of the material increased from 25.2 to 34.2 MPa, and Young’s modulus increased from 63.3 to 93.7 MPa. The helium gas permeability of the composites was reduced by 85%, compared with the unmodified WPU film. The arrangement structure of GO modified with dopamine (DGO) in polyurethane is the main reason for the excellent gas barrier performance of the material This work provides great potential with GO/polyurethane for industrial application.

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Synthesis of Large‐Area MXenes with High Yields through Power‐Focused Delamination Utilizing Vortex Kinetic Energy

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Evaluating the delamination process in the synthesis of MXenes (2D transition metal carbides and nitrides) is critical for their development and applications. However, the preparation of large defect-free MXene flakes with high yields is challenging. Here, a power-focused delamination (PFD) strategy is demonstrated that can enhance both the delamination efficiency and yield of large Ti 3 C 2 T x MXene nanosheets through repetitive precipitation and vortex shaking processes. Following this protocol, a colloidal concentration of 20.4 mg mL -1 of the Ti 3 C 2 T x MXene can be achieved after five PFD cycles, and the yield of the basal-plane-defect-free Ti 3 C 2 T x nanosheets reaches 61.2%, which is 6.4-fold higher than that obtained using the sonication-exfoliation method. Both nanometer-thin devices and self-supporting films exhibit excellent electrical conductivities (≈25 000 and 8260 S cm -1 for a 1.8 nm thick monolayer and 11 μm thick film, respectively). Hydrodynamic simulations reveal that the PFD method can efficiently concentrate the shear stress on the surface of the unexfoliated material, leading to the exfoliation of the nanosheets. The PFD-synthesized large MXene nanosheets exhibit superior electrical conductivities and electromagnetic shielding (shielding effectiveness per unit volume: 35 419 dB cm 2 g -1 ). Therefore, the PFD strategy provides an efficient route for the preparation of high-performance single-layer MXene nanosheets with large areas and high yields.

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Preparation of functionalized MXene-stitched-graphene oxide/poly (ethylene-co-acrylic acid) nanocomposite with enhanced hydrogen gas barrier properties

Cited by 51 publications

References 57 publications

Fabrication of impermeable dense architecture containing covalently stitched graphene oxide/boron nitride hybrid nanofiller reinforced semi-interpenetrating network for hydrogen gas barrier applications

Fabrication of impermeable dense architecture containing covalently stitched graphene oxide/boron nitride hybrid nanofiller reinforced semi-interpenetrating network for hydrogen gas barrier applications

Preparation of graphene oxide/ waterborne polyurethane via boric acid cross-linked dopamine enhanced barrier and mechanical properties

Synthesis of Large‐Area MXenes with High Yields through Power‐Focused Delamination Utilizing Vortex Kinetic Energy

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