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Comparative investigation of the formation of polytetrafluoroethylene nanoparticles on different solid substrates through the adsorption of tetrafluoroethylene
Author(s) -
Garshasbi Ashkan,
Mahdi Doroodmand Mohammad,
Pooladi Reza,
Safavi Afsaneh,
Hossein Sheikhi Mohammad
Publication year - 2011
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.33351
Subject(s) - tetrafluoroethylene , thermogravimetric analysis , materials science , polytetrafluoroethylene , nanoparticle , chemical engineering , fourier transform infrared spectroscopy , adsorption , scanning electron microscope , substrate (aquarium) , nanomaterials , molecular sieve , polymer chemistry , composite material , nanotechnology , polymer , organic chemistry , copolymer , chemistry , oceanography , geology , engineering
The effects of different solid substrates, including carbon nanofibers (CNFs), activated carbon, alumina, silica, molecular sieves, and poly( N ‐vinylpyrrolidione) (PVP), were compared for the high‐pressure synthesis of polytetrafluoroethylene [PTFE or (CF 2 ) n ] nanoparticles via the adsorption of thermally synthesized tetrafluoroethylene (C 2 F 4 ) as the monomer. Scanning electron microscopy, Fourier transform infrared spectroscopy, and thermogravimetric analysis (TGA) were used for the characterization of the PTFE nanoparticles on different solid substrates. The results demonstrate that the average diameters of the PTFE nanoparticles were about 90 nm for the CNFs, 130 nm for PVP, 150 nm for alumina, and about 200 nm for silica. Also, TGA showed that the amounts of PTFE nanoparticles synthesized on each solid substrate were 3.53 ± 0.09% for CNFs, 2.31 ± 0.10% for PVP, 2.11 ± 0.12% for silica, and 0.97 ± 0.16% for alumina. Depending on the active surface area and the morphology of nanomaterials, such as CNFs, different capacities were evaluated for each solid support in the formation of the PTFE nanoparticles. The quantities and the size of the synthesized PTFE nanoparticles relied on the characteristics of the solid substrate. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011