Surface Modification and Functionalization of Polytetrafluoroethylene Films

The co-deposition of acrylic acid and hexafluoropropylene oxide in pulsed plasmas was studied with the purpose to obtain wettable fluorocarbon coatings containing carboxylic acid groups, which are potentially useful for several employments, e.g., as proton-exchange membranes for electrochemical applications.It was found that the hydrophilic fluorocarbon thin films with the higher concentration of surface acidic groups can be obtained at lower duty cycle. After one week of immersion in water at 80°C the trends are inverted, the concentration of acidic groups and the wettability increase with the duty cycle.NICOLETTA DE VIETRO et al. 40

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“…The surface concentration of the carboxylic groups, before and after water immersion at 80°C, was determined by TBO test [21], …”

Section: (V) Toluidine Blue O (Tbo) Testmentioning

confidence: 99%

Hydrophilic Fluorocarbon Coatings via Plasma Enhanced-Chemical Vapour Co-Deposition of Acrylic Acid and Hexafluoropropylene Oxide

Vietro¹,

Milella²,

Fracassi³

2017

Jour. Mater. Sci. Eng. Adv. Tech.

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“…It is possible to graft vinylic monomers by radical polymerization onto polyaniline [75]. In general, only the surface of the polymer structures is modified [76].…”

Section: Grafting Of Vinylic Monomersmentioning

confidence: 99%

Organic Chemistry of Polyanilines: Tailoring Properties to Technological Applications~!2008-08-19~!2008-09-11~!2008-11-28~!

Miras¹,

Acevedo²,

Monge³

et al. 2008

TOMACROJ

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Abstract:The use of organic chemistry reactions to introduce additional functional groups on polyanilines is described. Among the reactions discussed are: electrophilic aromatic substitution, nucleophilic addition to the aromatic rings, nucleophilic substitution on the amine groups and reactions on pendant groups. The use of combinatorial chemistry techniques, by coupling of combinatorially synthesised diazonium salts with polyaniline, to produce a functionalized polyanilines library is also reviewed. The modification of polyaniline introduces or alters different properties of the materials: solubility, self-doping and redox coupled ion exchange. The tailoring of those properties to technical applications is therefore examined.

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“…Therefore, proper surface treatments are crucial for any applications to use them for adhesion with other materials. So far, many research have been carried out to improve the surface adhesion property of fluoropolymers by making use of wet chemical approaches with sodium naphthalenide treatment [1][2][3], photochemical modification with hydrazine [4], ion beam irradiation [5] or surface modification using low pressure plasmas [6][7][8][9][10][11][12] and atmospheric pressure plasmas [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Surface Modification of Fluorine-containing Polymers by Atmospheric Pressure Plasma Jet with Negative Substrate Biasing

Nagatsu

Kimpara

et al. 2017

J. Photopol. Sci. Technol.

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Fluoropolymers are difficult materials to modify the surfaces because of strong C-F bonds. In this study, the surface modification of fluoropolymer films such as polytetrafluoroethylene (PTFE) with amino groups was performed by using He/NH 3 gas mixture atmospheric pressure plasma jets with negatively-biased substrate. It is expected that the ion bombardment effect onto the polymer surface due to negative substrate bias will make dangling bonds over the polymer surface and eventually promote the surface modification. From XPS analysis, we confirmed the breaking C-F bonds and creating C-C, C=O or C-N bonds in C 1s spectrum and increasing nitrogen-containing functional groups in N 1s spectrum. Fluorescence patterns were observed on the amino group functionalized PTFE surface by using the fluorescent dyes selectively connecting with the amino groups. With a spectrophotometric method, the surface concentration of amino groups introduced onto the PTFE surface was evaluated to be roughly 3.86 nmol/cm 2 .

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Surface Modification and Functionalization of Polytetrafluoroethylene Films

Cited by 223 publications

References 35 publications

Hydrophilic Fluorocarbon Coatings via Plasma Enhanced-Chemical Vapour Co-Deposition of Acrylic Acid and Hexafluoropropylene Oxide

Hydrophilic Fluorocarbon Coatings via Plasma Enhanced-Chemical Vapour Co-Deposition of Acrylic Acid and Hexafluoropropylene Oxide

Organic Chemistry of Polyanilines: Tailoring Properties to Technological Applications~!2008-08-19~!2008-09-11~!2008-11-28~!

Surface Modification of Fluorine-containing Polymers by Atmospheric Pressure Plasma Jet with Negative Substrate Biasing

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