In situ thermal reduction of graphene oxide for high electrical conductivity and low percolation threshold in polyamide 6 nanocomposites

2012 ◽  
Vol 72 (2) ◽  
pp. 284-289 ◽  
Author(s):  
Dan Zheng ◽  
Guangshi Tang ◽  
Hao-Bin Zhang ◽  
Zhong-Zhen Yu ◽  
Fazel Yavari ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Graphene Oxide ◽  
Percolation Threshold ◽  
Polyamide 6 ◽  
Thermal Reduction ◽  
High Electrical Conductivity

Chemically reduced graphene oxide-coated knitted fabric imparted conductivity and outstanding hydrophobicity

2021 ◽  
pp. 004051752199547
Author(s):  
Min Hou ◽  
Xinghua Hong ◽  
Yanjun Tang ◽  
Zimin Jin ◽  
Chengyan Zhu ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Chemical Reduction ◽  
Knitted Fabric ◽  
Mesh Structure ◽  
Reduced Graphene ◽  
Chemically Reduced Graphene Oxide ◽  
Modified Hummers Method

Functionalized knitted fabric, as a kind of flexible, wearable, and waterproof material capable of conductivity, sensitivity and outstanding hydrophobicity, is valuable for multi-field applications. Herein, the reduced graphene oxide (RGO)-coated knitted fabric (polyester/spandex blended) is prepared, which involves the use of graphite oxide (GO) by modified Hummers method and in-situ chemical reduction with hydrazine hydrate. The treated fabric exhibits a high electrical conductivity (202.09 S/cm) and an outstanding hydrophobicity (140°). The outstanding hydrophobicity is associated with the morphology of the fabric and fiber with reference to pseudo-infiltration. These properties can withstand repeated bending and washing without serious deterioration, maintaining good electrical conductivity (35.70 S/cm) and contact angle (119.39°) after eight standard washing cycles. The material, which has RGO architecture and continuous loop mesh structure, can find wide use in smart garment applications.

Facile preparation of highly electrically conductive films of silver nanoparticles finely dispersed in polyisobutylene-b-poly(oxyethylene)-b-polyisobutylene triblock copolymers and graphene oxide hybrid surfactants

RSC Advances ◽  
2015 ◽  
Vol 5 (124) ◽  
pp. 102462-102468 ◽  
Author(s):  
Chih-Wei Chiu ◽  
Gang-Bo Ou
Keyword(s):  
Electrical Conductivity ◽  
Silver Nanoparticles ◽  
Graphene Oxide ◽  
Triblock Copolymers ◽  
Film Surface ◽  
High Electrical Conductivity ◽  
Electrically Conductive ◽  
Conductive Films ◽  
Heat Treated ◽  
Facile Preparation

The melted morphologies revealed that the AgNPs possessed mobility, and melted on the film surface, giving a high electrical conductivity of 5.2 × 10−2 Ω sq−1 when heat-treated at 350 °C.

scholarly journals In-situ reduction by Joule heating and measurement of electrical conductivity of graphene oxide in a transmission electron microscope

2D Materials ◽  
2021 ◽  
Vol 8 (3) ◽  
pp. 031001
Author(s):  
Simon Hettler ◽  
David Sebastian ◽  
Mario Pelaez-Fernandez ◽  
Ana M Benito ◽  
Wolfgang K Maser ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Graphene Oxide ◽  
Electron Microscope ◽  
Transmission Electron Microscope ◽  
Joule Heating ◽  
In Situ Reduction ◽  
Transmission Electron

scholarly journals Electrical Measurements of Thermally Reduced Graphene Oxide Powders under Pressure

Nanomaterials ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 1387 ◽  
Author(s):  
Hyunsoo Park ◽  
Soomook Lim ◽  
Dang Du Nguyen ◽  
Ji Won Suk
Keyword(s):  
Electrical Conductivity ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
High Performance ◽  
Applied Pressure ◽  
Thermal Reduction ◽  
Electrical Measurements ◽  
Oxide Powders ◽  
Bulk Electrical Conductivity ◽  
Reduced Graphene

Graphene powders obtained via the reduction of graphene oxide flakes have been widely used in various applications as they can be synthesized in large quantities with outstanding properties. The electrical conductivity of graphene powders is critical for their uses in fabricating high-performance devices or materials. Here, we investigated the bulk electrical conductivity of reduced graphene oxide (rGO) powders depending on the applied pressure and additional thermal annealing. The electrical conductivity of the rGO powders was correlated with the change in the carbon-to-oxygen ratio via additional thermal reduction. Furthermore, the effect of the morphology of the rGO powders was studied through electromechanical measurements. This study provides a reliable method for the electromechanical characterization of rGO powders and a better understanding of the electrical conductivity of graphene-based materials.

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