Retain strength, gain ductility: tough and transparent nanopapers by mercerisation

Florian Mayer, Alexander Prado-Roller, Andreas Mautner (Korresp. Autor*in), Alexander Bismarck (Korresp. Autor*in)

Veröffentlichungen: Beitrag in FachzeitschriftArtikelPeer Reviewed

Abstract

Nanocellulose papers offer high tensile strength and modulus but suffer from drawbacks such as their brittle nature. We show that mercerisation of cellulose nanopapers in strong alkaline media for 2 min to 24 h results in the (partial) transformation of native cellulose I into the more ductile cellulose II allomorph. The strain to failure of mercerised nanopapers tripled compared to the original nanopapers while retaining their tensile strength in excess of 100 MPa at the expense of a slight drop in modulus resulting in a significant increase in toughness (total work of fracture). An additional advantage of mercerisation is a reduction in porosity of the nanopapers and increased transparency.

OriginalspracheEnglisch
Seiten (von - bis)1533-1544
Seitenumfang12
FachzeitschriftCellulose
Jahrgang31
Ausgabenummer3
DOIs
PublikationsstatusVeröffentlicht - Feb. 2024

ÖFOS 2012

  • 104019 Polymerwissenschaften

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