Journal ArticleDOI
Molecular-Level Dispersion of Graphene into Poly(vinyl alcohol) and Effective Reinforcement of their Nanocomposites
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TLDR
In this paper, the preparation of polyvinyl alcohol (PVA) nanocomposites with graphene oxide (GO) using a simple water solution processing method is reported, and efficient load transfer is found between the nanofiller graphene and matrix PVA and the mechanical properties of the graphene-based nanocompositionite with molecule-level dispersion are significantly improved.Abstract:
Despite great recent progress with carbon nanotubes and other nanoscale fillers, the development of strong, durable, and cost-efficient multifunctional nanocomposite materials has yet to be achieved. The challenges are to achieve molecule-level dispersion and maximum interfacial interaction between the nanofiller and the matrix at low loading. Here, the preparation of poly(vinyl alcohol) (PVA) nanocomposites with graphene oxide (GO) using a simple water solution processing method is reported. Efficient load transfer is found between the nanofiller graphene and matrix PVA and the mechanical properties of the graphene-based nanocomposite with molecule-level dispersion are significantly improved. A 76% increase in tensile strength and a 62% improvement of Young's modulus are achieved by addition of only 0.7 wt% of GO. The experimentally determined Young's modulus is in excellent agreement with theoretical simulation.read more
Citations
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Nylon 6,6/graphene nanoplatelet composite films obtained from a new solvent
Evie L. Papadopoulou,Francesca Pignatelli,Sergio Marras,Lara Marini,Alexander Davis,Athanassia Athanassiou,Ilker S. Bayer +6 more
TL;DR: In this article, a mixture of trifluoroacetic acid (TFA) and acetone was used to dissolve nylon 6,6, resulting in crystalline and nonporous films.
Journal ArticleDOI
Graphene oxide: an adsorbent for the extraction and quantification of aflatoxins in peanuts by high-performance liquid chromatography.
TL;DR: The proposed method has been successfully applied to determine aflatoxins in peanut samples and good linear relationships were achieved with the correlation coefficient ranging from 0.99217 to 0.99995.
Journal ArticleDOI
Preparation and properties of amino-functional reduced graphene oxide/waterborne polyurethane hybrid emulsions
TL;DR: In this article, the authors provided a novel method to prepare amino-functional reduced graphene oxide/waterborne polyurethane (rGO/WPU) hybrid emulsions.
Journal ArticleDOI
Graphite oxide/polyurea and graphene/polyurea nanocomposites: A comparative investigation on properties reinforcements and mechanism
Xiaodong Qian,Xiaodong Qian,Lei Song,Qilong Tai,Qilong Tai,Yuan Hu,Richard K.K. Yuen,Richard K.K. Yuen +7 more
TL;DR: In this article, graphite oxide and graphene were incorporated into polyurea via in situ polymerization and the properties of the nanocomposites and the mechanism were compared and investigated through evaluating molecular weights, dispersion and interface interactions.
Journal ArticleDOI
Electrospinning of polymer nanofibers loaded with noncovalently functionalized graphene
Sriya Das,Ahmed S. Wajid,Sanjoy K. Bhattacharia,Michael D. Wilting,Iris V. Rivero,Micah J. Green +5 more
TL;DR: In this article, the authors examined the relationship between graphene loading and critical electrospinning parameters and found that the graphene significantly increases the fibers' thermal stability (increase of 15°C and crystallinity (59% increase) above the baseline.
References
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Synthesis of graphene-based nanosheets via chemical reduction of exfoliated graphite oxide
Sasha Stankovich,Dmitriy A. Dikin,Richard D. Piner,Kevin A. Kohlhaas,Alfred Kleinhammes,Yuanyuan Jia,Yue Wu,SonBinh T. Nguyen,Rodney S. Ruoff +8 more
TL;DR: In this paper, a colloidal suspension of exfoliated graphene oxide sheets in water with hydrazine hydrate results in their aggregation and subsequent formation of a high surface area carbon material which consists of thin graphene-based sheets.
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Graphene-based composite materials
Sasha Stankovich,Dmitriy A. Dikin,Geoffrey Dommett,K. Kohlhaas,Eric Zimney,Eric A. Stach,Richard D. Piner,SonBinh T. Nguyen,Rodney S. Ruoff +8 more
TL;DR: The bottom-up chemical approach of tuning the graphene sheet properties provides a path to a broad new class of graphene-based materials and their use in a variety of applications.
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Processable aqueous dispersions of graphene nanosheets
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