Disassociated molecular orientation distributions of a composite cellulose–lignin carbon fiber precursor: A study by rotor synchronized NMR spectroscopy and X-ray scattering
Artikel i vetenskaplig tidskrift, 2021

Cellulose–lignin composite carbon fibers have shown to be a potential environmentally benign alternative to the traditional polyacrylonitrile precursor. With the associated cost reduction, cellulose–lignin carbon fibers are an attractive light-weight material for, e.g. wind power and automobile manufacturing. The carbon fiber tenacity, tensile modulus and creep resistance is in part determined by the carbon content and the molecular orientation distribution of the precursor. This work disassociates the molecular orientation of different components in cellulose–lignin composite fibers using rotor-synchronized solid-state nuclear magnetic resonance spectroscopy and X-ray scattering. Our results show that lignin is completely disordered, in a mechanically stretched cellulose–lignin composite fiber, while the cellulose is ordered. In contrast, the native spruce wood raw material displays both oriented lignin and cellulose. The current processes for fabricating a cellulose–lignin composite fiber cannot regain the oriented lignin as observed from the native wood.

Carbon fibers

Solid-state NMR

Fiber

Composite

Rotor synchronized magic-angle spinning

Lignin

Wood

X-ray scattering

Regenerated cellulose

Molecular orientation distribution

Författare

Leo Svenningsson

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Lars Evenäs Group

Jenny Bengtsson

Chalmers, Kemi och kemiteknik, Kemiteknik, Skogsindustriell kemiteknik

Kerstin Jedvert

RISE Research Institutes of Sweden

Werner Schlemmer

Technische Universität Graz

Hans Theliander

Chalmers, Kemi och kemiteknik, Kemiteknik, Skogsindustriell kemiteknik

Wallenberg Wood Science Center (WWSC)

Lars Evenäs

Wallenberg Wood Science Center (WWSC)

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Lars Evenäs Group

Carbohydrate Polymers

0144-8617 (ISSN)

Vol. 254 117293

Ämneskategorier

Pappers-, massa- och fiberteknik

Polymerteknologi

Kompositmaterial och -teknik

DOI

10.1016/j.carbpol.2020.117293

PubMed

33357862

Mer information

Senast uppdaterat

2021-04-23