scholarly journals Nanostructured Biopolymer/Few-Layer Graphene Freestanding Films with Enhanced Mechanical and Electrical Properties

2018 ◽  
Vol 303 (4) ◽  
pp. 1700316 ◽  
Author(s):  
Cláudia Silva ◽  
Sofia G. Caridade ◽  
Eunice Cunha ◽  
Maria P. Sousa ◽  
Helena Rocha ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Layer Graphene ◽  
Mechanical And Electrical Properties ◽  
Few Layer Graphene

scholarly journals Composite Films of Waterborne Polyurethane and Few-Layer Graphene—Enhancing Barrier, Mechanical, and Electrical Properties

2019 ◽  
Vol 3 (2) ◽  
pp. 35
Author(s):  
Eunice Cunha ◽  
Maria Paiva
Keyword(s):  
Electrical Properties ◽  
Aqueous Suspension ◽  
Composite Films ◽  
Spray Coating ◽  
Waterborne Polyurethane ◽  
Free Standing ◽  
Layer Graphene ◽  
Mechanical And Electrical Properties ◽  
Thermal And Electrical Properties ◽  
Few Layer Graphene

Graphene has excellent mechanical, thermal, and electrical properties. Graphene can serve as potential reinforcement in polymer-based nanocomposites. In order to achieve this goal, graphene has to be distributed homogeneously and dispersed throughout the polymer matrix, establishing a strong interface with the polymer. Solution mixing is an interesting method for the preparation of homogeneous nanocomposites, in particular when using environmentally friendly solvents such as water. The major difficulty met in the production of graphene/polymer composites concerns the preparation and stabilization of graphene in aqueous suspension. In the present work three different graphite-based materials, with different crystallinity and purity grades, were exfoliated in aqueous solution of an amphiphilic pyrene derivative, forming few-layer graphene (FLG). The FLG prepared was dispersed in waterborne polyurethane (WPU) to produce composite films. The composite films were produced by solvent casting and spray coating, forming free-standing films that were characterized in terms of its distribution of FLG through the composite, its permeability to water vapor, its electrical resistivity, and its mechanical properties. The studies demonstrated the influence of different factors on the composite film properties such as the use of graphite vs. FLG, the FLG lateral dimensions, and the FLG composition and composite preparation method.

scholarly journals Solution blending preparation of polycarbonate/graphene composite: boosting the mechanical and electrical properties

RSC Advances ◽  
2016 ◽  
Vol 6 (100) ◽  
pp. 97931-97940 ◽  
Author(s):  
Emanuele Lago ◽  
Peter S. Toth ◽  
Giammarino Pugliese ◽  
Vittorio Pellegrini ◽  
Francesco Bonaccorso
Keyword(s):  
Electrical Conductivity ◽  
Thermal Properties ◽  
Electrical Properties ◽  
Mechanical And Thermal Properties ◽  
Layer Graphene ◽  
Graphene Composite ◽  
Solution Blending ◽  
Mechanical And Electrical Properties ◽  
Graphene Flakes ◽  
Few Layer Graphene

The preparation of polycarbonate-based graphene composites is reported. The loading of single- and few-layer graphene flakes improves the mechanical and thermal properties, as well as the electrical conductivity of the polymer.

Effect of few-layer graphene films as electrodes on the electrical properties of ferroelectric capacitors

RSC Advances ◽  
2016 ◽  
Vol 6 (70) ◽  
pp. 66011-66017
Author(s):  
Hong Jing Han ◽  
Yan Na Chen ◽  
Zhan Jie Wang
Keyword(s):  
Electrical Properties ◽  
Leakage Current ◽  
Leakage Current Density ◽  
Current Density ◽  
Van Der Waals ◽  
Layer Graphene ◽  
Graphene Films ◽  
Few Layer Graphene ◽  
Ferroelectric Capacitors

An FLG/PZT/Pt capacitor exhibits comparable polarization compared with a Pt/PZT/Pt capacitor but the magnitude of leakage current density for the FLG/PZT/Pt capacitor is largely decreased due to the van der Waals gap at the FLG/PZT interface.

Electrical properties of polytetrafluoroethylene/few-layer graphene composites fabricated by solid-state processing

2016 ◽  
Vol 51 (18) ◽  
pp. 2565-2573 ◽  
Author(s):  
JY Suh ◽  
SE Shin ◽  
DH Bae
Keyword(s):  
Electrical Conductivity ◽  
Solid State ◽  
Electrical Properties ◽  
Room Temperature ◽  
Three Dimensional ◽  
Powder Surface ◽  
Layer Graphene ◽  
Few Layer Graphene ◽  
State Processing

High electrical performances of polytetrafluoroethylene composites containing few-layer graphenes are established by solid-state processing. Polytetrafluoroethylene and FLG powders are mechanically mixed without solvents at room temperature, and hot-pressed. Few-layer graphenes are attached to the polytetrafluoroethylene powder, and gradually wrap the powder surface during milling with a low milling speed. The few-layer graphene-wrapped polytetrafluoroethylene powders readily facilitate the formation of a continuous few-layer graphene network due to the contact between adjacent few-layer graphene-wrapped powders. The final composites using few-layer graphene-wrapped polytetrafluoroethylene powders include a three-dimensional conducting network. Eventually, the wrapping morphology of the polytetrafluoroethylene/few-layer graphene powder results in a remarkable electrical conductivity of 7353 Sm−1 at 30 vol. %. few-layer graphene loading.

Study of mechanical and electrical properties of AlMgSi alloys

2010 ◽  
Vol 35 (1) ◽  
pp. 59-69 ◽  
Author(s):  
Fares Serradj ◽  
Rebal Guemini ◽  
Hichem Farh ◽  
Karim Djemmal
Keyword(s):  
Electrical Properties ◽  
Mechanical And Electrical Properties
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