Crosslinked PVA nanofibers reinforced with cellulose nanocrystals: Water interactions and thermomechanical properties

Medientyp: E-Artikel
Titel: Crosslinked PVA nanofibers reinforced with cellulose nanocrystals: Water interactions and thermomechanical properties
Beteiligte: Peresin, Maria Soledad; Vesterinen, Arja‐Helena; Habibi, Youssef; Johansson, Leena‐Sisko; Pawlak, Joel J.; Nevzorov, Alexander A.; Rojas, Orlando J.
Erschienen: Wiley, 2014
Erschienen in: Journal of Applied Polymer Science, 131 (2014) 11
Sprache: Englisch
DOI: 10.1002/app.40334
ISSN: 0021-8995; 1097-4628
Schlagwörter: Materials Chemistry ; Polymers and Plastics ; Surfaces, Coatings and Films ; General Chemistry
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Beschreibung: <jats:title>ABSTRACT</jats:title><jats:p>Acid‐catalyzed vapor phase esterification with maleic anhydride was used to improve the integrity and thermo‐mechanical properties of fiber webs based on poly(vinyl alcohol), PVA. The fibers were produced by electrospinning PVA from aqueous dispersions containing cellulose nanocrystals (CNCs). The effect of esterification and CNC loading on the structure and solvent resistance of the electrospun fibers was investigated. Chemical characterization of the fibers (FTIR, NMR) indicated the formation of ester bonds between hydroxyl groups belonging to neighboring molecules. Thermomechanical properties after chemical modification were analyzed using thermal gravimetric analysis, differential scanning calorimetry, and dynamic mechanical analysis. An 80% improvement in the ultimate strength was achieved for CNC‐loaded, crosslinked PVA fiber webs measured at 90% air relative humidity. Besides the ultra‐high surface area, the composite PVA fiber webs were water resistant and presented excellent mechanical properties. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. <jats:bold>2014</jats:bold>, <jats:italic>131</jats:italic>, 40334.</jats:p>

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