The effect of exfoliation and plasma application on the properties of continuous graphene oxide fiber

Uçar, Nuray; Can, Elif; Yuksek, Ilkay Ozsev; Olmez, Mervin; Önen, Aysęn; Karatepe, Nilgün

doi:10.1080/1536383x.2017.1337749

Cited by 6 publications

(4 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The thicknesses of the samples were measured with the integrated thickness meter device. Electrical conductivity (κ) was calculated in terms of S/cm by using the formula given below 29–33 where…”

Section: Methodsmentioning

confidence: 99%

“…GO solution was prepared according to the Modified Hummer’s Method. 36 Coagulation method (wet spinning) described previously 29 (Figure 2) was applied in order to obtain GO filaments. Aqueous GO suspension was injected to the coagulation bath via syringe in an attempt to produce continuous neat GO filaments.…”

Section: Methodsmentioning

confidence: 99%

“…Electrical conductivity (k) was calculated in terms of S/cm by using the formula given below [29][30][31][32][33] Preparation of GO fiber and RGO fiber GO solution was prepared according to the Modified Hummer's Method. 36 Coagulation method (wet spinning) described previously 29 (Figure 2) was applied in order to obtain GO filaments. Aqueous GO suspension was injected to the coagulation bath via syringe in an attempt to produce continuous neat GO filaments.…”

Section: Volumetric Electric Conductivitymentioning

confidence: 99%

See 2 more Smart Citations

Electromagnetic shielding effectiveness of carbon fabric/epoxy composite with continuous graphene oxide fiber and multiwalled carbon nanotube

Uçar

Kayaoğlu

Bilge

et al. 2018

Journal of Composite Materials

Self Cite

View full text Add to dashboard Cite

Carbon fabric composite is used in technical applications such as aircrafts in which electromagnetic shielding (electromagnetic interference–shielding effectiveness) is required. Traditionally, metallic coatings or metal plates are used for electromagnetic shielding, however, conductive filler-filled composite is also alternative to metal sheets due to its light weight. In the literatures, there are studies about effect carbon nanotube and graphene oxide flakes on electromagnetic interference; however, there are no studies encountered that search the effect of carbon nanotube/graphene oxide fiber and alignment of graphene oxide fiber on electromagnetic interference. Thus, in this study, fabrication of light-weight carbon fabric/epoxy composite filled with graphene oxide fiber, reduced graphene oxide fiber and multiwalled carbon nanotube and alignment of graphene oxide fiber was studied for the first time for both electromagnetic shielding (electromagnetic interference–shielding effectiveness) and electrical conductivity. It was found that reduced graphene oxide with two layers at the same alignment (0–0) leads to increment in the electromagnetic interference–shielding effectiveness value, while reduced graphene oxide with opposite alignment (0–90) leads to decrease in the electromagnetic interference–shielding effectiveness value. Opposite to literatures for graphene oxide flakes, highly rough surface of graphene oxide fiber and reduced graphene oxide fiber causes a deterioration in electromagnetic interference–shielding effectiveness due to disruptive multiple reflections resulted from highly rough surface of graphene oxide fiber, which causes multiple reflection effect. Multiwalled carbon nanotube generally provides higher electromagnetic interference–shielding effectiveness than graphene-based fiber because it has higher conductivity and has no disruptive effect of crimpy surface as graphene oxide fiber. Multiwalled carbon nanotube loading of 15 wt% results to 32 dB electromagnetic interference–shielding effectiveness, which is considered an adequate and moderate level of shielding for many applications.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Volumetric Electric Conductivitymentioning

confidence: 99%

See 1 more Smart Citation

Electromagnetic shielding effectiveness of carbon fabric/epoxy composite with continuous graphene oxide fiber and multiwalled carbon nanotube

Uçar

Kayaoğlu

Bilge

et al. 2018

Journal of Composite Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…Surface morphology studies after low-pressure oxygen plasma at 50 W showed that the surface of the GO becomes more porous and corrugated [9,37]. This leads to an increase in its wettability for both graphene oxide [20] and graphene [22,27], treated in oxygen plasma.…”

Section: Oxygen Plasmamentioning

confidence: 99%

Plasma Treatment of Graphene Oxide

Neustroev¹

2018

Graphene Oxide - Applications and Opportunities

View full text Add to dashboard Cite

Plasma treatment of graphene oxide (GO) is of interest for many applications such as gas sensors, flexible electrodes, biological applications, supercapacitors, batteries, etc. Plasma treatment is a high-tech process of processing materials in combination with efficiency, economy and environmental friendliness. At the same time, plasma treatments can lead to an increase in the defectiveness of the surface of GO. Therefore, it is important to know how the treatment in various gas media affects the properties of GO. This is necessary for the correct selection of processing parameters in order to reduce the negative impact of plasma treatment. The review presents the results of experimental studies of the effect of plasma in gases of oxygen, nitrogen, ammonia, sulfur hexafluoride, carbon tetrafluoromethane, hydrogen and methane on the properties of GO. Plasma treatments were used for the functionalization, reduction, doping of graphene oxide, and also for the obtaining GO from graphene by oxidation in oxygen plasma. The effects of plasma treatment are largely determined by the type of ions used and processing conditions: plasma power, processing time and temperature, pressure, as well as the location of the samples in the reaction chamber and their distance from the plasma ignition zone.

show abstract

Continuous Graphene Oxide Fiber and Its Applications

Uçar

Yuksek

2019

Handbook of Graphene

View full text Add to dashboard Cite

The effect of exfoliation and plasma application on the properties of continuous graphene oxide fiber

Cited by 6 publications

References 22 publications

Electromagnetic shielding effectiveness of carbon fabric/epoxy composite with continuous graphene oxide fiber and multiwalled carbon nanotube

Electromagnetic shielding effectiveness of carbon fabric/epoxy composite with continuous graphene oxide fiber and multiwalled carbon nanotube

Plasma Treatment of Graphene Oxide

Continuous Graphene Oxide Fiber and Its Applications

Contact Info

Product

Resources

About