Improvement of carbon nanotube dispersion in electrospun polyacrylonitrile fiber through plasma surface modification

Gürsoy, Mehmet; Ozcan, Fatih; Karaman, Mustafa

doi:10.1002/app.47768

Cited by 9 publications

(5 citation statements)

References 42 publications

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“…The reason for lower contact angle hysteresis value of PPFDA-coated paper can be rougher structure of PPFDA thin film. [33] Not only very smooth surface structure of PHFBA thin film, but also its similar radius of the curvature. [15] In these electrical measurements, graphene on PHFBA-coated paper was used because of its superior conductivity values as compared with graphene on PPFDA-coated paper.…”

Section: Resultsmentioning

confidence: 97%

“…According to these results, PPFDA‐coated paper exhibited lower contact angle hysteresis (12.8) as compared with that of PHFBA‐coated paper (18.5). The reason for lower contact angle hysteresis value of PPFDA‐coated paper can be rougher structure of PPFDA thin film . Not only very smooth surface structure of PHFBA thin film, but also its similar wetting behavior to graphene surface could have played an important role in better graphene transfer without cracks and defects as compared to PPFDA surface.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

All‐Dry Hydrophobic Functionalization of Paper Surfaces for Efficient Transfer of CVD Graphene

Çıtak

İstanbullu

Şakalak

et al. 2019

Macro Chemistry & Physics

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In this study, the successful transfer of chemical vapor deposition (CVD)‐grown graphene on an ordinary printing paper surface is demonstrated. Pristine paper is not a suitable substrate for graphene transfer because of its fragile and hydrophilic nature against the chemicals used during the transfer process. Two different fluoroalkyl polymers, namely poly(hexafluorobutyl acrylate) (PHFBA) and poly(perfluorodecyl acrylate) (PPFDA) are coated on paper surfaces by an initiated CVD (iCVD) technique to make the paper surfaces hydrophobic. Hydrophobicity is found to be an important factor in order for the graphene to be transferred onto the paper substrate. Although surfaces coated with PPFDA possess better hydrophobicity owing to their longer perfluoroalkyl group and higher roughness, the graphene transfer is found to be more successful on a PHFBA‐coated surface. A thin film of PHFBA on the paper surface acts as a prime layer for effective and defect‐free transfer of graphene and makes the paper surface ideal and robust during the graphene transfer process. The as‐transferred graphene layer on the PHFBA‐coated paper surface shows high conductivity values, even after repeated folding and flattening cycles.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

All‐Dry Hydrophobic Functionalization of Paper Surfaces for Efficient Transfer of CVD Graphene

Çıtak

İstanbullu

Şakalak

et al. 2019

Macro Chemistry & Physics

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View full text Add to dashboard Cite

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“…In order to obtain more detailed information about the surface wettability of the PI thin films, the surface energy of the PI thin film as deposited on the silicon wafer was measured. The surface tension values of test liquids used in surface energy calculation 45 and measured the contact angle results were given in Table 2.

σ_{S}^{D}

and

σ_{S}^{P}

values of PI were calculated to be 33.12 mN/m and 0.51 mN/m, respectively.…”

Section: Resultsmentioning

confidence: 99%

Vapor deposition polymerization of synthetic rubber thin film in a plasma enhanced chemical vapor deposition reactor

Gürsoy

2020

J of Applied Polymer Sci

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Rubber is one of the most commonly used industrial materials worldwide. However, there is a gap in the literature on the production of rubber thin films in nanoscale. When the rubber thin films are produced in nanoscale, they can be used in high-tech applications where bulk rubbers have never been used before. This study is one of the first investigations to focus on the vapor-based production of the polyisoprene (PI), which is an important member of the synthetic rubber class. For this purpose, a single-step, rapid and environmentally friendly method based on plasma enhanced chemical vapor deposition (PECVD) was employed to produce PI thin films using 2-methyl-1,3-butadiene (isoprene). The high-vapor pressure of isoprene makes it a promising monomer for the production of chemical vapor deposition polymers. The effect of plasma processing parameters on the PI deposition rate was investigated. The deposition rate of PI thin film as high as 40 nm/min was achieved and the contact angle of PI coated bamboo surface was found to be 146.8. The mechanical durability and laundering tests of PI thin films were performed. Based on this study results, PI thin films produced by PECVD can be used in a number of potential applications.

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“…The use contact angle CA measurements for plasma-treated nanomaterials, such as CNTs and graphene, have already been used to assess the functionalization of graphitic fillers [5]. It has also been already been proved that graphitic fillers, which are normally hydrophobic materials, if made hydrophilic, can be incorporated and distributed homogenously within composites to maximize the structural capabilities of the reinforcement [5,44]. A first series of experiments has been carried out by using graphite in order to define optimal conditions for the plasma functionalization to be applied for the case of graphene.…”

Section: Plasma Functionalizationmentioning

confidence: 99%

Investigation of Plasma-Assisted Functionalization of Graphitic Materials for Epoxy Composites

et al. 2019

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In this study we evaluated the effect of microwave vacuum plasma for the surface functionalization of graphitic fillers (graphite and graphene); we also showed the effect of the functionalization on the mechanical and electrical properties of epoxy composites. Optimized conditions of plasma treatment were defined to obtain high plasma density and increased surface hydrophilicity of the fillers, with high stability of functionalization over time and temperature. However, the extent of such treatments proved to be limited by the high temperatures involved in the curing process of the resin. The use of specific gas mixtures (He/O2) during functionalization and the use of a high surface filler (graphene) can partially limit these negative effects thanks to the higher thermal stability of the induced functionalization. As a consequence, mechanical tests on graphene filled epoxies showed limited improvements in flexural properties while electrical resistivity is slightly increased with a shift of the percolation threshold towards higher filler concentration.

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Improvement of carbon nanotube dispersion in electrospun polyacrylonitrile fiber through plasma surface modification

Cited by 9 publications

References 42 publications

All‐Dry Hydrophobic Functionalization of Paper Surfaces for Efficient Transfer of CVD Graphene

All‐Dry Hydrophobic Functionalization of Paper Surfaces for Efficient Transfer of CVD Graphene

Vapor deposition polymerization of synthetic rubber thin film in a plasma enhanced chemical vapor deposition reactor

Investigation of Plasma-Assisted Functionalization of Graphitic Materials for Epoxy Composites

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