Disclosed is a reinforced biodegradable polymer nanocomposite. The reinforced biodegradable polymer nanocomposite comprises a polymer matrix and functionalised graphene nanoplatelets or graphene-like material dispersed in the polymer matrix. The graphene nanoplatelets or graphene-like material are functionalized with functional groups in a manner that planar structure of the graphene nanoplatelets or graphene-like material is retained. Disclosed further is a method of manufacturing the aforementioned reinforced biodegradable polymer nanocomposite. The method comprises functionalizing graphene nanoplatelets or graphene-like material with functional groups in a manner that planar structure of the graphene nanoplatelets or graphene-like material is retained; and dispersing functionalized graphene nanoplatelets or graphene-like material in the polymer matrix to form the reinforced biodegradable polymer nanocomposite.

A polymer composition for impregnating a high temperature superconductor (HTS) coil, the composition comprising: a polymer resin, a plurality of particles of a first filler material, and a plurality of particles of a second filler material; wherein the median particle size of the second filler material is less than the median particle size of the first filler material. The polymer composition may be used to prepare a polymer impregnated HTS coil having a predetermined turn-to-turn spacing. A property of the polymer composition may also be modified, for example, the coefficient of thermal contraction and/or resistivity of the composition. Also disclosed is a polymer impregnated HTS coil and a method for preparing the coil.

High spherical particles for use in piezoelectric applications may be produced mixing a mixture comprising a graphene oxide-polyvinylidene fluoride (GO-PVDF) composite, a carrier fluid that is immiscible with the PVDF, and optionally an emulsion stabilizer at a temperature equal to or greater than a melting point or softening temperature of the PVDF to disperse the GO-PVDF composite in the carrier fluid, wherein the GO-PVDF composite has a transmission FTIR minimum transmittance ratio of β-phase PVDF to α-phase PVDF of about 1 or less; cooling the mixture to below the melting point or softening temperature of the PVDF to form GO-PVDF particles; and separating the GO-PVDF particles from the carrier fluid, wherein the GO-PVDF particles comprise the graphene oxide dispersed in the PVDF, and wherein the GO-PVDF particles have a transmission FTIR minimum transmittance ratio of β-phase PVDF to α-phase PVDF of about 1 or less.

High spherical particles for use in piezoelectric applications may be produced mixing a mixture comprising a graphene oxide-polyvinylidene fluoride (GO-PVDF) composite, a carrier fluid that is immiscible with the PVDF, and optionally an emulsion stabilizer at a temperature equal to or greater than a melting point or softening temperature of the PVDF to disperse the GO-PVDF composite in the carrier fluid, wherein the GO-PVDF composite has a transmission FTIR minimum transmittance ratio of β-phase PVDF to α-phase PVDF of about 1 or less; cooling the mixture to below the melting point or softening temperature of the PVDF to form GO-PVDF particles; and separating the GO-PVDF particles from the carrier fluid, wherein the GO-PVDF particles comprise the graphene oxide dispersed in the PVDF, and wherein the GO-PVDF particles have a transmission FTIR minimum transmittance ratio of β-phase PVDF to α-phase PVDF of about 1 or less.

An adhesion structure and an electronic device are provided. The adhesion structure includes a substrate and an adhesive layer. The adhesive layer is disposed on the substrate, and the adhesive layer includes a plurality of graphene microplates. A part of the graphene microplates protrude from two opposite surfaces of the adhesive layer. The thickness of the graphene microplates is greater than or equal to 0.3 nanometers and is less than or equal to 3 nanometers. The flake diameter of the graphene microplates is greater than or equal to 1 micrometer and is less than or equal to 30 micrometers. The adhesion structure can not only provide the adhesive function, but also improve the heat dissipation efficiency of electronic device.

An article incorporates an enhanced dielectric breakdown strength and enhanced energy storage density composite material comprising a polymer matrix and hybrid filler particles comprising graphene oxide (GO) and a thermally conductive ceramic material having a thermal conductivity of at least 2 W/(m#K). The hybrid filler particles are distributed within the polymer matrix in a weight percentage less than about 15 weight percent.

An article incorporates an enhanced dielectric breakdown strength and enhanced energy storage density composite material comprising a polymer matrix and hybrid filler particles comprising graphene oxide (GO) and a thermally conductive ceramic material having a thermal conductivity of at least 2 W/(m#K). The hybrid filler particles are distributed within the polymer matrix in a weight percentage less than about 15 weight percent.

Highly spherical particles may comprise a thermoplastic polymer grafted to a carbon nanomaterial (CNM-g-polymer), wherein the particles have an aerated density of about 0.5 g/cm.sup.3 (preferably about 0.55 g/cm.sup.3) to about 0.8 g/cm.sup.3. Said CNM-g-polymer particles may be useful in a variety of applications including selective laser sintering additive manufacturing methods.

A composition is provided that restores and protects substrates to which it is applied including trim, headlight, or tires on vehicles. The composition includes reactive silicone silanes, graphene, and an adhesion promoter all dissolved or dispersed in a carrier oil or solvent. The composition forms a high adhesion high cohesion film that protects the underlying substrate from the adverse effects of ultraviolet (UV) rays, heat, rain, snow, and other environmental contaminants. A process of applying the same is also provided.

Rubber components of a tire comprising a diene elastomer and at least 1 phr of reduced graphene oxide nanoparticles having a specific surface area of at least 700 m.sup.2/g, an oxygen content of no more than 6 at %, and a ratio of non-aromaticity to aromaticity I.sub.D/I.sub.G of at least 0.7 as determined by Raman spectroscopy. Methods of preparing such rubber compositions in an internal mixer for achieving good distribution and dispersion are also included.