Surface modification and functionalization of polytetrafluoroethylene films via graft copolymerization

Surface Modification of Fluoropolymers via Molecular Design

“…[130] The AAc graft-copolymerized PTFE (AAcg-PTFE) films were further functionalized via coating of an adherent layer of a conductive polymer, or via covalent immobilization of a biologically active species, such as an enzyme. [131,132] Graft copolymerization of AAc on PTFE±per-fluoroalkyl vinyl ether copolymer film by a laser beam has also been reported. [133] The fluoropolymer film placed in contact with AAc solution was irradiated with a KrF laser through the film to excite the film±solution interface.…”

“…Coating or adsorption of the insulating emeraldine base form of polyaniline on the AAc or NaSS graft-copolymerized PTFE film has also been reported. [131,132] Interfacial protonation of the coated emeraldine base by the grafted AAc or styrenesulfonic acid polymer has given rise to a semiconductive PTFE surface and a strongly adhered polyaniline layer.…”

Surface structural changes, surface energy and antiwear properties of polytetrafluoroethylene induced by proton irradiation

“…Moreover, the O1s signal was also observed at ca. 531 eV, which might arise from the partial oxidation of specimens after taking out of the vacuum irradiation chamber [36,37]. These results indicated that proton irradiation could lead to a great defluorination and carbonization of the PTFE surface, and the varying degree is not obvious with increasing irradiation time.…”

“…6c, only a weak peak situated at 531.9 eV before proton irradiation. The new peak centered at 532.1 eV with a broad region from 534.6 eV to 530.5 eV after proton irradiation for 15 min, and the peak height shifted to 530.7 eV following exposure time for 60 min, which implied that radicals formed during proton irradiation could react with oxygen to produce some oxygencontaining functional groups such as carbonyl (531.3 eV) and hydroxyl (532.8/534.6 eV) groups after exposure to air [36,37]. The above analyses suggested that proton irradiation could induce complex chemical reaction occurring in the surface structure of PTFE.…”

Surface Modification of Poly(tetrafluoroethylene) Microporous Membranes by Acrylic Acid Liquid-Phase Graft Copolymerization

“…To eliminate the time-dependent effects, further modification methods have been applied via surface grafting copolymerization after plasma treatment. [3,[10][11][12] This suggests a good method for modifying PTFE composite membrane for special applications.…”