Molecular‐Level Dispersion of Graphene into Poly(vinyl alcohol) and Effective Reinforcement of their Nanocomposites

Liang, Jiajie; Huang, Yi; Zhang, Long; Wang, Yan; Ma, Yanfeng; Guo, Tianyin; Chen, Yongsheng

doi:10.1002/adfm.200801776

Cited by 1,519 publications

(925 citation statements)

References 41 publications

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“…We found a minor shift of typical TGA curves for PVA/graphene films towards higher temperature, which is indicating a change of thermal resistivity for PVA after G GA incorporation. This observation is consistent with the previous reported effect of graphene on the thermal properties of PVA (Guo et al 2011;Liang et al 2009). From the presented DTG curves of the same samples, we identify the onset temperature, T on shift to 345 from 335°C for PVA/graphene film with 0.05 wt% concentration.…”

Section: Thermal Stabilitysupporting

confidence: 83%

“…In addition to zero toxicity, the presence of high number of OH bonds in PVA is also allowing high solubility of PVA in water. Despite these advantages, the reported values of tensile strength, r (15.7-74 MPa) for pristine PVA (Chen et al 2005;Liang et al 2009;Liu et al 2005) are remarkably lower than that of industrial polymer such as nylon 6 (Cho and Paul 2001;Zhang et al 2004). To improve the mechanical characteristic of PVA, reinforcement by filler is very important as the selected filler must not only enhance the tensile strength of PVA, but also have good interfacial interactions with PVA.…”

Section: Introductionmentioning

confidence: 99%

“…However, pristine graphene is hydrophobic in nature and this makes the dispersion of graphene in a hydrophilic polymer like PVA unfeasible. To overcome this challenge, graphene oxide (GO) was commonly used as a filler for PVA due to high solubility of GO in water (Liang et al 2009). The H-bonding between PVA and GO was suggested as a major mechanism in homogeneous distribution of GO in the matrix of PVA.…”

Section: Introductionmentioning

confidence: 99%

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Application of graphene from exfoliation in kitchen mixer allows mechanical reinforcement of PVA/graphene film

et al. 2017

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Mechanical properties of polyvinyl alcohol (PVA) can be reinforced from the addition of graphene into its matrix. However, pristine graphene lacks solubility in water and thus makes dispersion a challenging task. Notably, functionalisation of graphene is required to accommodate graphene presence in the water. In this work, we have used a kitchen mixer to produce gum Arabicgraphene (G GA ) for the first time as filler for mechanical reinforcement of PVA. For the characterisation of exfoliated graphene, mean lateral size of G GA was measured from the imaging by transmission electron microscopy while the mean thickness of graphene was predicted from the obtained spectra by Raman spectroscopy. During the preparation of PVA/graphene film by solution casting, G GA was varied between 0, 0.05, 0.075, 0.10 and 0.15 wt% in concentration. We found that the presence of G GA in PVA improves the tensile stress and elastic modulus about 72-200 and 19-187% from the original values. The data from Halpin-Tsai meanwhile suggested that the mechanical reinforcement of PVA/graphene film is due to the random distribution network of G GA in PVA.

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Section: Thermal Stabilitysupporting

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Application of graphene from exfoliation in kitchen mixer allows mechanical reinforcement of PVA/graphene film

et al. 2017

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“…Incorporating GO into poly (vinyl acetate) matrix, followed by a reduction process, result in a conductive composite with a percolation threshold below 1 wt% [66]. Poly (vinyl acetate) nanocomposites with loading as low as 0.7% showed 76% and 62% increase in tensile strength and Young's Modulus respectively [90]. The graphene/polymer nanocomposites with excellent thermal properties offer potential applications in electronic packaging and advanced composites.…”

Section: Graphene/polymer Nanocompositesmentioning

confidence: 99%

The Prospective Two-Dimensional Graphene Nanosheets: Preparation, Functionalization and Applications

et al. 2012

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Abstract:Graphene, as an intermediate phase between fullerene and carbon nanotube, has aroused much interests among the scientific community due to its outstanding electronic, mechanical, and thermal properties. With excellent electrical conductivity of 6000 S/cm, which is independent on chirality, graphene is a promising material for high-performance nanoelectronics, transparent conductor, as well as polymer composites. On account of its Young's Modulus of 1 TPa and ultimate strength of 130 GPa, isolated graphene sheet is considered to be among the strongest materials ever measured. Comparable with the single-walled carbon nanotube bundle, graphene has a thermal conductivity of 5000 W/(m·K), which suggests a potential application of graphene in polymer matrix for improving thermal properties of the graphene/polymer composite. Furthermore, graphene exhibits a very high surface area, up to a value of 2630 m 2 /g. All of these outstanding properties suggest a wide application for this nanometer-thick, two-dimensional carbon material. This review article presents an overview of the significant advancement in graphene research: preparation, functionalization as well as the properties of graphene will be discussed. In addition, the feasibility and potential applications of graphene in areas, such as sensors, nanoelectronics and nanocomposites materials, will also be reviewed.

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“…Graphene based nanocomposites have been investigated for their superior electrical, thermal, and mechanical properties [10][11][12]. The incorporation of various nano-sized reinforcements into an epoxy matrix can maximize the advantages of structural composites [13][14][15]. Remarkable improvements in physical and mechanical properties of polymer composites have been reported upon the addition of a small amount of graphene [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Effect of chemically reduced graphene oxide on epoxy nanocomposites for flexural behaviors

Lee¹,

Chong²,

Kim³

et al. 2014

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In this work, nanocomposites of epoxy resin and chemically reduced graphene oxide (RGO) were prepared by thermal curing process. X-ray diffractions confirmed the microstructural properties of RGO. Differential scanning calorimetry was used to evaluate the curing behaviors of RGO/epoxy nanocomposites with different RGO loading amounts. We investigated the effect of RGO loading amounts on the mechanical properties of the epoxy nanocomposites. It was found that the presence of RGO improved both flexural strength and modulus of the epoxy nanocomposites till the RGO loading reached 0.4 wt%, and then decreased. The optimum loading achieved about 24.5 and 25.7% improvements, respectively, compared to the neat-epoxy composites. The observed mechanical reinforcement might be an enhancement of mechanical interlocking between the epoxy matrix and RGO due to the unique planar structures.

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Molecular‐Level Dispersion of Graphene into Poly(vinyl alcohol) and Effective Reinforcement of their Nanocomposites

Cited by 1,519 publications

References 41 publications

Application of graphene from exfoliation in kitchen mixer allows mechanical reinforcement of PVA/graphene film

Application of graphene from exfoliation in kitchen mixer allows mechanical reinforcement of PVA/graphene film

The Prospective Two-Dimensional Graphene Nanosheets: Preparation, Functionalization and Applications

Effect of chemically reduced graphene oxide on epoxy nanocomposites for flexural behaviors

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