Hydrophobization of polymer particles by tetrafluoromethane (CF4) plasma irradiation using a barrel-plasma-treatment system

Matsubara, Keisuke; Danno, Masato; Inoue, Mitsuhiro; Nishizawa, Hideki; Honda, Yuji; Abe, Takayuki

doi:10.1016/j.apsusc.2013.07.103

Cited by 18 publications

(7 citation statements)

References 22 publications

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“…As can be clearly seen in Figure a, a dramatic change in the color of the PA12 powder was observed as the pristine PA12 powder is white and becomes light brown after a 1 h exposure, and a darker brown after 2 h. The treated and nontreated powders were also pressed into solid discs with the disc surface displaying a uniform color which reveals that only fewer powder particles were not well‐exposed (see Figure b). Activated atoms and molecules in the electric field during plasma exposure react with the modified surface, creating new oxygenated groups and new chemical functionalities …”

Section: Resultsmentioning

confidence: 99%

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Surface modification of the laser sintering standard powder polyamide 12 by plasma treatments

Almansoori

Masters

Abrams

et al. 2018

Plasma Processes & Polymers

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Polyamide 12 (PA12) powder was exposed for up to 3 h to low pressure air plasma treatment (LP‐PT) and several minutes by two different atmospheric pressure plasma jets (APPJ) i.e., kINPen (K‐APPJ) and Hairline (H‐APPJ). The chemical and physical changes resulting from LP‐PT were observed by a combination of Scanning Electron Microscopy (SEM), Hot Stage Microscopy (HSM) and Fourier transform infrared spectroscopy (FTIR), which demonstrated significant changes between the plasma treated and untreated PA12 powders. PA12 exposed to LP‐PT showed an increase in wettability, was relatively porous, and possessed a higher density, which resulted from the surface functionalization and materials removal during the plasma exposure. However, it showed poor melt behavior under heating conditions typical for Laser Sintering. In contrast, brief PJ treatments demonstrated similar changes in porosity, but crucially, retained the favorable melt characteristics of PA12 powder.

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Section: Resultsmentioning

confidence: 99%

“…Several attempts have been carried out to modify a wide range of polymers using plasma for different purposes . Studies focused on the plasma treatment of PA12 are concentrated on the bulk material, thin films, or fibers .…”

Section: Introductionmentioning

confidence: 99%

Surface modification of the laser sintering standard powder polyamide 12 by plasma treatments

Almansoori

Masters

Abrams

et al. 2018

Plasma Processes & Polymers

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“…Abe et al . reported that the hydrophobicity of various polymer particles is mostly influenced by the functionalization over the roughness factor . In our experiments, the results were in agreement with this, and surface roughness showed little influence in the absence of fluorine groups.…”

Section: Resultsmentioning

confidence: 99%

Mechanisms of hydrophobization of polymeric composites etched in CF₄plasma

Puliyalil

Recek

Filipič

et al. 2016

Surf. Interface Anal.

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Achieving optimal hydrophobicity of polymer materials especially polymer–matrix composites is important for many material applications. Herein the interplay of factors determining hydrophobic surface is presented during CF4 plasma treatments which lead to functionalization as well as selective polymer–matrix etching. The continuous exposure to plasma reactive species induces functionalization and etching on the surface, which decides the surface morphology and surface chemistry. Consequently, exothermic processes during the plasma–surface interactions are another important factor which influences the surface chemistry and etching rate of the material. The results demonstrate that despite etching and increasing surface roughness, the major contribution to hydrophobic character is dependent on the number of carbon atoms populated with fluorine, whereas the temperature is a deciding factor for type of created bonds. Copyright © 2016 John Wiley & Sons, Ltd.

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“…Besides, they verified some laws related to low pressure carbon-fluorine plasma and believed that the value of F/C ratio lower than 3 was the necessary condition for low pressure plasma to reach the deposition state. Matsubara et al [36] used CF 4 tubular plasma treatment system to treat polymethylmethacrylate (PMMA) so as to improve the hydrophobicity of PMMA in 2013. After fluorination treatment, the smooth surface of PMMA became nano-scale vermicular structure.…”

Section: Introductionmentioning

confidence: 99%

Effect of CF₄ concentration on the discharge dynamics and reactive species distribution of atmospheric nanosecond pulsed He plasma jet

Zhao,

Wang,

Liu

2023

J. Phys. D: Appl. Phys.

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Based on a two dimensional (2D) self-consistent model, the effect of different CF4 concentrations on the discharge dynamics characteristics, F-containing species distribution and the distribution of the axial and radial ionization rates of He atmospheric pressure plasma jet (APPJ) has been investigated. In addition, the accuracy of the simulation is verified by comparing the experimental results. The ionization rate of He APPJ enhances with the increase of CF4 from 0 to 2% because of the Penning ionization of CF4 with metastable He while decreases in the case of 3% CF4 owing to the electronegativity and the electron excitation energy loss of CF4. The increase of CF4 concentration and the decrease of the electron density leads to the decrease of CF4+ density at 3%CF4. CF3+ density is determined by the Penning ionization rate of CF4 and the reaction rate of He+ + CF4 → CF3+ + F + He. As CF4 concentration increases from 2% to 3%, the decrease of metastable He and He+ concentration results in the significant decrease of CF3+ density. The densities of CF3⁻ and F⁻ keep increasing from 1% to 3%CF4 due to the effect of the electron attachment reaction of CF4. With the addition of CF4, the ionization reaction of CF4 is gradually playing the major role in the streamer head, the Penning ionization of CF4 is the main source of electron ionization inside the jet and dominates in the formation of ionization wave tail. As the concentration of CF4 increases from 0 to 2%, the electron impact ionization rates of He and CF4 near the axis increase, resulting in the more uniform radial ionization rate distribution of He + 2%CF4 APPJ.

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Hydrophobization of polymer particles by tetrafluoromethane (CF4) plasma irradiation using a barrel-plasma-treatment system

Cited by 18 publications

References 22 publications

Surface modification of the laser sintering standard powder polyamide 12 by plasma treatments

Surface modification of the laser sintering standard powder polyamide 12 by plasma treatments

Mechanisms of hydrophobization of polymeric composites etched in CF₄plasma

Effect of CF₄ concentration on the discharge dynamics and reactive species distribution of atmospheric nanosecond pulsed He plasma jet

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Hydrophobization of polymer particles by tetrafluoromethane (CF4) plasma irradiation using a barrel-plasma-treatment system

Cited by 18 publications

References 22 publications

Surface modification of the laser sintering standard powder polyamide 12 by plasma treatments

Surface modification of the laser sintering standard powder polyamide 12 by plasma treatments

Mechanisms of hydrophobization of polymeric composites etched in CF4plasma

Effect of CF4 concentration on the discharge dynamics and reactive species distribution of atmospheric nanosecond pulsed He plasma jet

Contact Info

Product

Resources

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Mechanisms of hydrophobization of polymeric composites etched in CF₄plasma

Effect of CF₄ concentration on the discharge dynamics and reactive species distribution of atmospheric nanosecond pulsed He plasma jet