Carbon Tetrafluoride, Oxygen, and Air RF Plasma Modified Low-Density Polyethylene and Polydimethylsiloxane

Polat, Osman; Bhethanabotla, Venkat R.; Ayyala, Ramesh S.; Şahiner, Nurettin

doi:10.1007/s11090-023-10324-z

Cited by 3 publications

(4 citation statements)

References 31 publications

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“…A reason for this could be the functionalization of additional surface groups after repeated H 2 plasma treatments. These results show that the chemical composition of the surfaces also plays a significant role in the surface wetting behavior, in addition to the surface morphology, emphasizing the availability of appropriate functional groups [41][42][43].…”

Section: Contact Angle and Surface Free Energy Measurementsmentioning

confidence: 78%

“…It was reported that the surface of the LDPE samples could be fluorinated upon CF 4 plasma treatment [41]. After introducing the C-CF, CF, CF 2 and CF 3 groups by means of CF 4 plasma treatments, the hydrophobicity of the materials increased [44][45][46].…”

Section: Contact Angle and Surface Free Energy Measurementsmentioning

confidence: 97%

“…For CF 4 -treated samples, on the other hand, the sliding angles of LDPE samples increased from 12.5 • ± 0.4 to 27.2 • ± 2.7. One reason for that could be the increased nanoscale roughness with the plasma etching, which can lead to drop pinning [41,50,51]. The increased roughness can make the droplets less prone to slide off the surface of LDPE samples.…”

Section: Sliding Angle Measurementsmentioning

confidence: 99%

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Force-Based Characterization of the Wetting Properties of LDPE Surfaces Treated with CF4 and H2 Plasmas

et al. 2023

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Low-density polyethylene (LDPE) films are widely used in packaging, insulation and many other commodity applications due to their excellent mechanical and chemical properties. However, the water-wetting and water-repellant properties of these films are insufficient for certain applications. In this study, bare LDPE and textured LDPE (T-LDPE) films were subjected to low-pressure plasmas, such as carbon tetrafluoride (CF4) and hydrogen (H2), to see the effect of plasma treatment on the wetting properties of LDPE films. In addition, the surface of the LDPE film was textured to improve the hydrophobicity through the lotus effect. The LDPE and T-LDPE films had contact angle (θ) values of 98.6° ± 0.6 and 143.6° ± 1.0, respectively. After CF4 plasma treatments, the θ values of the surfaces increased for both surfaces, albeit within the standard deviation for the T-LDPE film. On the other hand, the contact angle values after H2 plasma treatment decreased for both surfaces. The surface energy measurements supported the changes in the contact angle values: exposure to H2 plasma decreased the contact angle, while exposure to CF4 plasma increased the contact angle. Kinetic friction force measurements of water drops on LDPE and T-LDPE films showed a decrease in friction after the CF4 plasma treatment, consistent with the contact angle and surface energy measurements. Notably, the kinetic friction force measurements proved to be more sensitive compared to the contact angle measurements in differentiating the wetting properties of the T-LDPE versus 3× CF4-plasma-treated LDPE films. Based on Atomic Force Microscopy (AFM) images of the flat LDPE samples, the 3× CF4 plasma treatment did not significantly change the surface morphology or roughness. However, in the case of the T-LDPE samples, Scanning Electron Microscopy (SEM) images showed noticeable morphological changes, which were more significant at sharp edges of the surface structures.

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Section: Contact Angle and Surface Free Energy Measurementsmentioning

confidence: 78%

Section: Contact Angle and Surface Free Energy Measurementsmentioning

confidence: 97%

Section: Sliding Angle Measurementsmentioning

confidence: 99%

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Force-Based Characterization of the Wetting Properties of LDPE Surfaces Treated with CF4 and H2 Plasmas

et al. 2023

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“…-O 2 plasmas increase the levels of oxygen-containing functional groups such as hydroxyl (-OH), carbonyl (-C=O) and carboxyl (-COOH) to improve the wettability of polymers such as PE, polyurethane, vinyl-trimethoxysilane-grafted ethylene-propylene and PMMA [94][95][96][97]. Interestingly, oxygen plasma can also selectively erode the organic component of polydimethylsiloxane (PDMSO)-like films applied to hydrophobic polymers, leading to the creation of a hydrophilic surface [98].…”

Section: Plasma Gas Compositionmentioning

confidence: 99%

From Basics to Frontiers: A Comprehensive Review of Plasma-Modified and Plasma-Synthesized Polymer Films

Dufour

2023

Polymers

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This comprehensive review begins by tracing the historical development and progress of cold plasma technology as an innovative approach to polymer engineering. The study emphasizes the versatility of cold plasma derived from a variety of sources including low-pressure glow discharges (e.g., radiofrequency capacitively coupled plasmas) and atmospheric pressure plasmas (e.g., dielectric barrier devices, piezoelectric plasmas). It critically examines key operational parameters such as reduced electric field, pressure, discharge type, gas type and flow rate, substrate temperature, gap, and how these variables affect the properties of the synthesized or modified polymers. This review also discusses the application of cold plasma in polymer surface modification, underscoring how changes in surface properties (e.g., wettability, adhesion, biocompatibility) can be achieved by controlling various surface processes (etching, roughening, crosslinking, functionalization, crystallinity). A detailed examination of Plasma-Enhanced Chemical Vapor Deposition (PECVD) reveals its efficacy in producing thin polymeric films from an array of precursors. Yasuda’s models, Rapid Step-Growth Polymerization (RSGP) and Competitive Ablation Polymerization (CAP), are explained as fundamental mechanisms underpinning plasma-assisted deposition and polymerization processes. Then, the wide array of applications of cold plasma technology is explored, from the biomedical field, where it is used in creating smart drug delivery systems and biodegradable polymer implants, to its role in enhancing the performance of membrane-based filtration systems crucial for water purification, gas separation, and energy production. It investigates the potential for improving the properties of bioplastics and the exciting prospects for developing self-healing materials using this technology.

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High-performance sulfur-rich COF/PTFE composite membrane for the efficient removal of Hg(II) from acidic wastewater

Ding,

Liu,

Guo

et al. 2024

Journal of Membrane Science

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Carbon Tetrafluoride, Oxygen, and Air RF Plasma Modified Low-Density Polyethylene and Polydimethylsiloxane

Cited by 3 publications

References 31 publications

Force-Based Characterization of the Wetting Properties of LDPE Surfaces Treated with CF4 and H2 Plasmas

Force-Based Characterization of the Wetting Properties of LDPE Surfaces Treated with CF4 and H2 Plasmas

From Basics to Frontiers: A Comprehensive Review of Plasma-Modified and Plasma-Synthesized Polymer Films

High-performance sulfur-rich COF/PTFE composite membrane for the efficient removal of Hg(II) from acidic wastewater

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