Effect of low energy plasma treatment on surface chemistry and phase composition of electrospun polyvinylidene fluoride membrane
Autor: | Pavlína Hájková, Eva Štěpanovská, Martin Kormunda, Petr Ryšánek, Pavla Čapková, Jaroslav Pavlik |
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Rok vydání: | 2021 |
Předmět: |
Surface (mathematics)
Materials science General Physics and Astronomy 02 engineering and technology Surfaces and Interfaces General Chemistry Plasma 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Polyvinylidene fluoride 0104 chemical sciences Surfaces Coatings and Films chemistry.chemical_compound Crystallinity Membrane Low energy chemistry Chemical engineering Electrode 0210 nano-technology Bond cleavage |
Zdroj: | Surfaces and Interfaces. 22:100900 |
ISSN: | 2468-0230 |
Popis: | Present paper shows special benefits of low energy plasma treatment on PVDF electrospun nanofiber membrane, where the plasma power 120W has been applied between two flat electrodes creating homogeneous electric field. This experimental arrangement was crucial for two specific effects: (1) Surface activation took place by the scission of C-H bonds without defluorination (preserving the stronger C-F bonds) and consequently preserving the chains ordering and (2) Homogeneous electric field by low plasma power led to better chains ordering, higher degree of crystallinity and increase in the proportion of electroactive beta phase to almost the entire sample volume. This is a major difference from previous publications using higher plasma energies (240-500W) that report successful surface activation, but accompanied by defluorination, chain breaks and a decrease in the electroactive beta phase fraction. |
Databáze: | OpenAIRE |
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