Surface Modification of Polytetrafluoroethylene by Atmospheric Pressure Plasma-Grafted Polymerization

Cheng, Chou‐Yuan; Chung, Fang-Yi; Chou, Pei-Yuan; Huang, Chun

doi:10.1007/s11090-020-10112-z

Cited by 20 publications

(15 citation statements)

References 32 publications

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“…From Figure 5 a and Table 2 , it can be seen that the O element peak can be observed on the surface of the ETFE-1 membrane after helium plasma modification compared to the ETFE-0 membrane, the O element content can account for up to 8.52%, and the O/C can increase from 0.003 (ETFE-0 membrane) to 0.17, indicating that the He plasma modification will generate active sites on the membrane surface. These active sites, after being exposed to air, interact with the O 2 , H 2 O and CO 2 molecules in air to form oxygen-containing groups [ 7 , 8 ].…”

Section: Resultsmentioning

confidence: 99%

“…As a dry treatment method, plasma treatment is widely used in the field of the surface modification of polymer materials, which can introduce a variety of active functional groups on the surface of treated samples in a short time, with the advantages of low environmental pollution and a good modification effect. Current research on plasma modification of polymer-membrane surfaces is divided into low-pressure and atmospheric-pressure plasma treatment [ 5 , 6 , 7 ]. Low-pressure plasma treatment needs to be carried out in a certain vacuum environment, requiring corresponding vacuum equipment, which is demanding for special equipment and not suitable for large-scale processing.…”

Section: Introductionmentioning

confidence: 99%

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Surface Modification of ETFE Membrane and PTFE Membrane by Atmospheric DBD Plasma

Zhao

Zhang

et al. 2022

Membranes

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Fluorine resin membranes with excellent chemical resistance have great potential for the application of high-performance chemical protective clothing. However, it is difficult to integrate fluorine resins into other materials such as fabrics due to their lower surface energy and poor bondability, making the fabrication of composite fabrics and the further seal splicing challenging. In this study, atmospheric pressure dielectric barrier discharge (DBD) plasma in helium (He) and helium/acrylic acid (He/AA) mixture atmospheres were used to modify two kinds of fluorine resins, ethylene tetrafluoroethylene (ETFE) and polytetrafluoroethylene (PTFE) membrane. The surface chemical properties, physical morphology, hydrophilicity and adhesion strength of the fluororesin membranes before and after plasma treatments were systematically analyzed. The results showed that the plasma treatment can modify the membrane surface at the nanoscale level without damaging the main body of the membrane. The hydrophilicity of the plasma-treated membrane was improved with the water contact angle decreasing from 95.83° to 49.9° for the ETFE membrane and from 109.9° to 67.8° for the PTFE membrane, respectively. The He plasma creates active sites on the membrane surface as well as etching the membrane surface, increasing the surface roughness. The He/AA plasma treatment introduces two types of polyacrylic acid (PAA)—deposited polyacrylic acid (d-PAA) and grafted polyacrylic acid (g-PAA)—on the membrane surface. Even after ultrasonic washing with acetone, g-PAA still existed stably and, as a result, improved the polarity and adhesion strength of fluororesin membranes. This work provides useful insights into the modification mechanism of DBD plasma on fluorine resins, with implications for developing effective strategies of integrating fluorine resin membrane to chemical protective clothing fabrics.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Surface Modification of ETFE Membrane and PTFE Membrane by Atmospheric DBD Plasma

Zhao

Zhang

et al. 2022

Membranes

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“…High-resolution XPS spectra reveal the specific oxygenated species on the CB (0) electrode and the CB (100) electrode, as shown in Figure 2 . The C1s spectra can be deconvoluted into seven peaks [ 26 , 34 , 35 , 36 , 37 , 38 ], including C–C related to graphitic carbon at 284.8 eV, amorphous carbon defects on carbon black surface at 285.4 eV, C–O (286.4–286.9 eV), C=O (287.8 eV), O=C−OH (289.3 eV), the characteristic shakeup line of carbon (π−π* transition) in aromatic compounds at 291.2 eV, and C–F at 292.3 eV. The O1s spectra can be deconvoluted into two peaks [ 26 , 36 ], which are assigned to C=O (532.2 eV) and C–O (533.2 eV), respectively.…”

Section: Resultsmentioning

confidence: 99%

A Facile Method to Realize Oxygen Reduction at the Hydrogen Evolution Cathode of an Electrolytic Cell for Energy-Efficient Electrooxidation

et al. 2021

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Electrochemical oxidation, widely used in green production and pollution abatement, is often accompanied by the hydrogen evolution reaction (HER), which results in a high consumption of electricity and is a potential explosion hazard. To solve this problem, we report here a method for converting the original HER cathode into one that enables the oxygen reduction reaction (ORR) without having to build new electrolysis cells or be concerned about electrolyte leakage from the O2 gas electrode. The viability of this method is demonstrated using the electrolytic production of ammonium persulfate (APS) as an example. The original carbon black electrode for the HER is converted to an ORR electrode by first undergoing in situ anodization and then contacting O2 or air bubbled from the bottom of the electrode. With this sole change, APS production can achieve an electric energy saving of up to 20.3%. Considering the ease and low cost of this modification, such significant electricity savings make this method very promising in the upgrade of electrochemical oxidation processes, with wide potential applications.

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“…For example, the low surface energy and poor wettability of PTFE leads to poor adhesion with metals, thus limiting the options for the processing development. The extremely low tackiness makes the PTFE film skeleton difficult to combine with other materials, hindering its usage to form functional composite materials [9]. Surface modification is an attractive way to chemically alter a polymer.…”

Section: Introductionmentioning

confidence: 99%

“…However, the rather good chemical stability renders it difficult to modify and functionalize PTFE surface. As a consequence, conventional surface treatment processes suffer from major disadvantages like contamination, complexity, expensiveness, and large solvent consumption [9].…”

Section: Introductionmentioning

confidence: 99%

Study on CO2-based plasmas for surface modification of polytetrafluoroethylene and the wettability effects

Lin

Rui

et al. 2021

Journal of CO2 Utilization

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Surface Modification of Polytetrafluoroethylene by Atmospheric Pressure Plasma-Grafted Polymerization

Cited by 20 publications

References 32 publications

Surface Modification of ETFE Membrane and PTFE Membrane by Atmospheric DBD Plasma

Surface Modification of ETFE Membrane and PTFE Membrane by Atmospheric DBD Plasma

A Facile Method to Realize Oxygen Reduction at the Hydrogen Evolution Cathode of an Electrolytic Cell for Energy-Efficient Electrooxidation

Study on CO2-based plasmas for surface modification of polytetrafluoroethylene and the wettability effects

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