Preparation for Graphene Coated Polyvinyl Alcohol Based Conductive Fiber Containing Silver Nanowires

2019 ◽  
Vol 807 ◽  
pp. 171-175
Author(s):  
Chao Xiao ◽  
Xi Ke Xiong ◽  
Jun Sun ◽  
Li Xing Dai
Keyword(s):  
Electrical Conductivity ◽  
Graphene Oxide ◽  
Synergistic Effect ◽  
Polyvinyl Alcohol ◽  
Silver Nanowires ◽  
Chemical Reduction ◽  
Fiber Surface ◽  
Coated Fiber ◽  
Conductive Fiber ◽  
Pva Fiber

Graphene oxide (GO) coated fiber via deposition of GO sheets on polyvinyl alcohol (PVA) fiber containing silver nanowires (AgNWs) was fabricated, and chemical reduction for GO on the fiber surface was carried out to obtain reduced GO (rGO) coated PVA-AgNWs (rGO/PVA-AgNWs) fiber. The results showed that the rGO sheets were closely adhered on the surface of fiber, the electrical conductivity of the fiber increased with coating times of GO, and the conductivity was high up to 2.05×10-3 S/m when GO was coated 3 times on the fiber and reduced. The synergistic effect of rGO and AgNWs for the conductivity was also clearly indicated.

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.

scholarly journals Cement-Based Materials Containing Graphene Oxide and Polyvinyl Alcohol Fiber: Mechanical Properties, Durability, and Microstructure

Nanomaterials ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 638 ◽  
Author(s):  
Wenguang Jiang ◽  
Xiangguo Li ◽  
Yang Lv ◽  
Mingkai Zhou ◽  
Zhuolin Liu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Flexural Strength ◽  
Polyvinyl Alcohol ◽  
Mechanical Strength ◽  
Mechanical Performance ◽  
Control Sample ◽  
Corrosion Condition ◽  
Cement Based Materials ◽  
Strength And Durability ◽  
Pva Fiber

The influence of graphene oxide (GO) and polyvinyl alcohol (PVA) fiber on the mechanical performance, durability, and microstructure of cement-based materials was investigated in this study. The results revealed that compared with a control sample, the mechanical strength and durability of cement-based materials were significantly improved by adding PVA fiber and GO. The compressive and flexural strength at 28 d were increased by 30.2% and 39.3%, respectively. The chloride migration coefficient at 28 d was reduced from 7.3 × 10−12 m2/s to 4.3 × 10−12 m2/s. Under a sulfate corrosion condition for 135 d, the compressive and flexural strength still showed a 13.9% and 12.3% gain, respectively. Furthermore, from the Mercury Intrusion Porosimetry (MIP) test, with the incorporation of GO, the cumulative porosity decreased from more than 0.13 cm3/g to about 0.03 cm3/g, and the proportion of large capillary pores reduced from around 80% to 30% and that of medium capillary pores increased from approximately 20% to 50%. Scanning electron microscope (SEM) images showed a significant amount of hydration products adhering to the surface of PVA fiber in the GO and PVA fiber modified sample. The addition of GO coupling with PVA fiber in cement-based materials could promote hydration of cement, refine the microstructure, and significantly improve mechanical strength and durability.

scholarly journals Caffeine as Nitrogen Source for Reduce Graphene Doping, and Its Functionalization with Silver Nanowires

2018 ◽  
Author(s):  
Daniel Ramirez-Gonzalez ◽  
Jose de Jesus Cruz-Rivera ◽  
Hugo Tiznado ◽  
Angel Gabriel Rodriguez-Vazquez ◽  
Ivan Guillen-Escamilla ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Nitrogen Source ◽  
Silver Nanowires ◽  
Chemical Reduction ◽  
Low Cost ◽  
Nitrogen Doped ◽  
Nanowires Growth ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene ◽  
Ft Ir

In this work, we propose an easy and a low cost method for the synthesis of Nitrogen-Doped Graphene NDG and its silver nanowires NW functionalization NWGN. The synthesis was performed using the improved graphene oxide method, chemical reduction of graphene oxide in the presence of caffeine as green nitrogen source and the subsequently the silver nanowires growth in the surface, by the chemical reductions salts in the presence of NG. Achieving a homogeneous growing (coating) of graphene sheets. The samples were analyzed using conventional characterization techniques: SEM-EDX, XRD, FT-IR, RAMAN, TEM, HRTEM, STEM and XPS.

The synergistic effect of polyvinyl alcohol and graphene oxide on the corrosion resistance of waterborne coatings

2021 ◽  
Vol 160 ◽  
pp. 106526
Author(s):  
Heqi Li ◽  
Caihong Xue ◽  
Wenjie Cheng ◽  
Li Gao ◽  
Xiaomin Wang ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Graphene Oxide ◽  
Synergistic Effect ◽  
Polyvinyl Alcohol ◽  
Waterborne Coatings

Synergistic effect of vanadium pentoxide and graphene oxide in polyvinyl alcohol for energy storage application

2016 ◽  
Vol 76 ◽  
pp. 14-27 ◽  
Author(s):  
Kalim Deshmukh ◽  
M. Basheer Ahamed ◽  
Rajendra R. Deshmukh ◽  
S.K. Khadheer Pasha ◽  
Kishor Kumar Sadasivuni ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Energy Storage ◽  
Synergistic Effect ◽  
Polyvinyl Alcohol ◽  
Vanadium Pentoxide ◽  
Energy Storage Application

Transition of graphene oxide-coated fiber bundles from insulator to conductor by chemical reduction

2015 ◽  
Vol 204 ◽  
pp. 90-94 ◽  
Author(s):  
Dong Han Ha ◽  
Suyong Jung ◽  
Ho-Jong Kim ◽  
Daehee Kim ◽  
Wan-Joong Kim ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Chemical Reduction ◽  
Fiber Bundles ◽  
Coated Fiber

Increase of Electrical Conductivity due to Chemical Reduction of Pre-Exfoliated Graphene Oxide by Sodium Borohydride

2015 ◽  
Vol 1117 ◽  
pp. 187-190 ◽  
Author(s):  
Astrida Berzina ◽  
Velta Tupureina ◽  
Raimonds Orlovs ◽  
Dmitrijs Saharovs ◽  
Juris Bitenieks ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Graphene Oxide ◽  
Sodium Borohydride ◽  
Metal Ion ◽  
Large Scale ◽  
Chemical Reduction ◽  
Reduction Process ◽  
Suspension Stability ◽  
Exfoliated Graphene ◽  
Reduced Graphene

Graphene oxide (GO) reduction is a promising way for graphene large scale synthesis. Pre-exfoliated graphite was oxidized and reduced. The material was compared to commercial graphene oxide and its reduced sample. The reduction process of graphene oxide is accomplished using sodium borohydride (NaBH4) with variable-valence metal ion – cobalt – assistance. The reduced graphene oxide (RGO) was characterized by Raman spectroscopy. The particle size and suspension stability were determined. Electrical conductivity measurements of GO and RGO samples have been done in temperature range from-150°C to 85°C. Pre-exfoliation effect was determined.

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