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Erschienen in: Cellulose 6/2013

01.12.2013 | Original paper

Crosslinked nanofibrillated cellulose: poly(acrylic acid) nanocomposite films; enhanced mechanical performance in aqueous environments

verfasst von: Steven Spoljaric, Arto Salminen, Nguyen Dang Luong, Jukka Seppälä

Erschienen in: Cellulose | Ausgabe 6/2013

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Abstract

Nanofibrillated cellulose (NFC) was compounded with poly(acrylic acid) (PAA) via solvent casting. Nanocomposite films were thermally-crosslinked to allow the formation of ester bonds between NFC and PAA, as confirmed by 13CNMR and infrared spectroscopy. The network morphology of the cellulose nanofibrils was left intact by the introduction of PAA and crosslinking. Water absorption and swelling was diminished by the introduction of crosslinking, due to the reduced number of vacant hydroxyl and carboxyl groups available to interact with water molecules. Crosslinking with PAA increased the activation energy required for thermal degradation. PAA effectively reinforced NFC, increasing Young’s modulus, tensile strength and glass transition temperature. Crosslinking imparted restraints on segmental motion of polymer chains, further enhancing the thermomechanical properties and retaining elasticity. Wet-strength properties were enhanced due to the reduced hydrophilicity of crosslinked nanocomposite films.

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Metadaten
Titel
Crosslinked nanofibrillated cellulose: poly(acrylic acid) nanocomposite films; enhanced mechanical performance in aqueous environments
verfasst von
Steven Spoljaric
Arto Salminen
Nguyen Dang Luong
Jukka Seppälä
Publikationsdatum
01.12.2013
Verlag
Springer Netherlands
Erschienen in
Cellulose / Ausgabe 6/2013
Print ISSN: 0969-0239
Elektronische ISSN: 1572-882X
DOI
https://doi.org/10.1007/s10570-013-0061-x

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