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Publikācija: Mechanical Reinforcement of Electrospun Poly(Vinyl Alcohol) by α-FeOOH Nanowires

Publication Type Scientific article indexed in SCOPUS or WOS database
Funding for basic activity Unknown
Defending: ,
Publication language English (en)
Title in original language Mechanical Reinforcement of Electrospun Poly(Vinyl Alcohol) by α-FeOOH Nanowires
Field of research 2. Engineering and technology
Sub-field of research 2.5 Materials engineering
Authors Anna Šutka
Martin Järvekülg
Andris Šutka
Ivo Heinmaa
Uno Mäeorg
Krisjanis Smits
Keywords goethite; electrospinning; mechanical properties; nanostructured polymers
Abstract We report the mechanical performance of α-FeOOH nanowire reinforced poly(vinyl alcohol) (PVA) composite nanofiber mat, fabricated using straightforward aqueous processing methods. Goethite (α-FeOOH) nanocrystals have a high elastic modulus and –OH rich surface, ensuring strong interactions with hydrophilic polymers and effective reinforcement. Needle-less electrospinning resulted in alignment of the nanowires along fibre axis, as confirmed by transmittance electron microscopy studies. Produced composite PVA nanofibers containing 10 wt% goethite nanoparticles exhibited an outstanding fivefold increase in Young's modulus and 2.5-fold improvement of tensile strength compared to mats of neat PVA. The addition of α-FeOOH had a significant influence on glass transition temperature indicating formation of interphase regions around nanowire inclusions. Observed properties are explained by nanowire grafting in the precursor solution, extensive interactions between the adsorbed PVA chains and the matrix and percolation of interphase regions at 10 wt% α-FeOOH.
DOI: 10.1002/pc.24231
Hyperlink: https://onlinelibrary.wiley.com/doi/abs/10.1002/pc.24231 
Reference Šutka, A., Järvekülg, M., Šutka, A., Heinmaa, I., Mäeorg, U., Smits, K. Mechanical Reinforcement of Electrospun Poly(Vinyl Alcohol) by α-FeOOH Nanowires. Polymer Composites, 2018, Vol.39, iss.7, pp.2461-2468. ISSN 0272-8397. e-ISSN 1548-0569. Available from: doi:10.1002/pc.24231
Additional information Citation count:
ID 22685