Thermal and mechanical properties of a poly(ϵ‐caprolactone)/graphite oxide composite

Kai, Wu; Hirota, Yuuki; Lee, Hua; Inoue, Yoshio

doi:10.1002/app.27210

Cited by 143 publications

(91 citation statements)

References 30 publications

(36 reference statements)

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“…Previous work on graphene oxide [20,21] had introduced a mixing method for the production of graphene oxide polymer materials. Adapting this method using highly reduced, well dispersed graphene resulted in graphene/polycaprolactone composites with good mechanical and conducting properties but poor graphene dispersion in the matrix.…”

Section: Discussionmentioning

confidence: 99%

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Covalently linked biocompatible graphene/polycaprolactone composites for tissue engineering

Sayyar¹,

Murray²,

Thompson³

et al. 2013

Carbon

226

156

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Two synthesis routes to graphene/polycaprolactone composites are introduced and the properties of the resulting composites compared. In the first method, mixtures are produced using solution processing of polycaprolactone and well dispersed, chemically reduced graphene oxide and in the second, an esterification reaction covalently links polycaprolactone chains to free carboxyl groups on the graphene sheets. This is achieved through the use of a stable anhydrous dimethylformamide dispersion of graphene that has been highly chemically reduced resulting in mostly peripheral ester linkages. The resulting covalently linked composites exhibit far better homogeneity and as a result, both Young's modulus and tensile strength more than double and electrical conductivities increase by 14 orders of magnitude over the pristine polymer at less than 10 per cent graphene content. In vitro cytotoxicity testing of the materials showed good biocompatibility resulting in promising materials for use as conducting substrates for the electrically stimulated growth of cells. Two synthesis routes to graphene/polycaprolactone composites are introduced and the properties of the resulting composites compared. In the first method, mixtures are produced using solution processing of polycaprolactone and well dispersed, chemically reduced graphene oxide and in the second, an esterification reaction covalently links polycaprolactone chains to free carboxyl groups on the graphene sheets. This is achieved through the use of a stable anhydrous dimethylformamide dispersion of graphene that has been highly chemically reduced resulting in mostly peripheral ester linkages. The resulting covalently linked composites exhibit far better homogeneity and as a result, both Young's modulus and tensile strength more than double and electrical conductivities increase by ≈ 14 orders of magnitude over the pristine polymer at less than 10 % graphene content. In vitro cytotoxicity testing of the materials showed good biocompatibility resulting in promising materials for use as conducting substrates for the electrically stimulated growth of cells.

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Section: Discussionmentioning

confidence: 99%

“…Graphene oxide was synthesized from natural graphite powder using a modified Hummers' method in two steps using K 2 S 2 O 8 , P 2 O 5 and H 2 SO 4 followed by H 2 SO 4 , KMnO 4 and H 2 O 2 to achieve better oxidation of graphite (20,21).…”

Section: Preparation Of Graphene Oxide (Go)mentioning

confidence: 99%

Covalently linked biocompatible graphene/polycaprolactone composites for tissue engineering

Sayyar¹,

Murray²,

Thompson³

et al. 2013

Carbon

226

156

View full text Add to dashboard Cite

show abstract

“…From these values, it is observed that the conductivity increases by 2 orders with increasing wt.% ratio of PVA/PVP : GO (0.1, 0.2, and 0.3). From the figure, it is clear that as the temperature increases, the conductivity increases predominantly [37].…”

Section: Conductivity Studiesmentioning

confidence: 95%

Structural and Electrical Properties of Graphene Oxide-Doped PVA/PVP Blend Nanocomposite Polymer Films

Basha

Kumar

Sundari

et al. 2018

Advances in Materials Science and Engineering

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Graphene oxide (GO) nanoparticles were incorporated in PVA/PVP blend polymers for the preparation of nanocomposite polymer films by the solution cast technique. XRD, FTIR, DSC, SEM, and UV-visible studies were performed on the prepared nanocomposite polymer films. XRD revealed the amorphous nature of the prepared films. ermal analysis of the nanocomposite polymer films was analyzed by DSC. SEM revealed the morphological features and the degree of roughness of the samples. DC conductivity studies were under taken on the samples, and the conductivity was found to be 6.13 × 10 −4 S·cm −1 for the polymer film prepared at room temperature. A solid-state battery has been fabricated with the chemical composition of Mg + /(PVA/PVP : GO)/(I 2 + C + electrolyte), and its cell parameters like power density and current density were calculated.

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“…9 Recently, polymer/graphite nanosheet composites have been intensively studied because of their excellent properties. [10][11][12][13] The weak interplanar forces allow for certain atoms, molecules, and ions to intercalate into the interplanar spaces of the graphite. 9 However, unlike the layered clay, there are no reactive ionic groups on the surface of the original layered graphite.…”

Section: Introductionmentioning

confidence: 99%

Improving the thermal and mechanical properties of poly(propylene carbonate) by incorporating functionalized graphite oxide

Bian

Xiao

Gong

et al. 2011

J of Applied Polymer Sci

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Poly(propylene carbonate) (PPC) is a new biodegradable aliphatic polycarbonate. However, the poor thermal stability, low glass transition temperatures (T g ), and relatively low mechanical property have limited its applications. To improve the thermal and mechanical properties of PPC, functionalized graphite oxide (MGO) was synthesized and mixed with PPC by a solution intercalation method to produce MGO/PPC composites. A uniform structure of MGO/PPC composites was confirmed by X-ray diffraction and scanning electron microscope. The thermal and mechanical properties of MGO/ PPC composites were investigated by thermal gravimetric analysis, differential scanning calorimetric, dynamic mechanical analysis, and electronic tensile tester. Due to the nanometer-sized dispersion of layered graphite in polymer matrix, MGO/PPC composites exhibit improved thermal and mechanical properties than pure PPC. When the MGO content is 3.0 wt %, the MGO/PPC composites shows the best thermal and mechanical properties. These results indicate that nanocomposition is an efficient and convenient method to improve the properties of PPC.

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Thermal and mechanical properties of a poly(ϵ‐caprolactone)/graphite oxide composite

Cited by 143 publications

References 30 publications

Covalently linked biocompatible graphene/polycaprolactone composites for tissue engineering

Covalently linked biocompatible graphene/polycaprolactone composites for tissue engineering

Structural and Electrical Properties of Graphene Oxide-Doped PVA/PVP Blend Nanocomposite Polymer Films

Improving the thermal and mechanical properties of poly(propylene carbonate) by incorporating functionalized graphite oxide

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