Wettability enhancement of polymeric and glass micro fiber reinforcement by plasma treatment

0486261 - FZÚ 2018 RIV CZ eng C - Conference Paper (international conference)
Trejbal, J. - Šmilauer, V. - Kromka, Alexander - Potocký, Štěpán - Kopecký, L.
Wettability enhancement of polymeric and glass micro fiber reinforcement by plasma treatment.
NANOCON 2015: 7th International Conference on Nanomaterials - Research and Application, Conference Proceedings. Ostrava: TANGER, spol. s r.o., 2015, s. 315-320. ISBN 978-80-87294-63-5.
[NANOCON 2015. International Conference /7./. Brno (CZ), 14.10.2015-16.10.2015]
Institutional support: RVO:68378271
Keywords : plasma treatments * cool oxygen plasma * wettability * contact angle * micro fibers
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)

Plasma treatments were used to modify surface properties of polyethylene terephthalate (PET) and glass micro fibers, to improve their wettability. PET fibers, having diameter of 400 μm, and glass fibers (14 μm) were exposed to low pressure oxygen plasma. A direct horizontal optical method was used for contact angle measurements on fiber surfaces submerged into distilled water. Surface morphology changes before and after treatment were characterized by scanning electron microscopy. Finally, cement paste specimens reinforced with PET and lime-based mortars reinforced with glass fibers were made and after 28 days of mixture curing tested by four-point bending tests. After oxygen plasma treatment contact angles decreased by 60 % on PET fibers and by 25 % on glass fibers in comparison with untreated fibers. Next, SEM images revealed the significant surface damages of PET fibers and minor damages of glass fibers. Both four-point tested samples reinforced with treated fibers exhibited the maximum bending strength loss about to 10 to 20 percent compared to samples with untreated reinforcement.
Permanent Link: http://hdl.handle.net/11104/0281135