Nanofibrillated cellulose originated from birch sawdust after sequential extractions: a promising polymeric material from waste to films

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)


Interna författare/redaktörer


Publikationens författare: Jun Liu, Risto Korpinen, Kirsi S. Mikkonen, Stefan Willför, Chunlin Xu
Förläggare: SPRINGER
Publiceringsår: 2014
Tidskrift: Cellulose
Tidskriftsakronym: CELLULOSE
Volym: 21
Nummer: 4
Artikelns första sida, sidnummer: 2587
Artikelns sista sida, sidnummer: 2598
Antal sidor: 12
ISSN: 0969-0239
eISSN: 1572-882X


Abstrakt

The residual cellulose of wood processing waste, sawdust, which was leftover after sequential hot-water extraction processes to isolate hemicelluloses and lignin in a novel forest biorefinery concept, was explored as the starting material for preparation of a highly value-added polymeric material, nanofibrillated cellulose (NFC) also widely termed as cellulose nanofiber, which has provided an alternative efficient way to upgrade sawdust waste. The residual cellulose in sawdust was converted to a transparent NFC suspension in water through the 2,2,6,6-tetramethylpiperidine-1-oxyl radical/NaClO/NaBr oxidization approach. The resultant NFC with a dimension of ca. 5 nm in width and hundreds of nanometers in length were further processed into NFC films. The morphological features of the NFC suspension and its films were assessed by transmission electron microscopy and scanning electron microscopy. Highly even dispersion of NFC fibrils in the films originated from sawdust feasibly contributes to the outstanding mechanical performance of the films. NFC suspension with higher carboxylate content and its resultant NFC films were found to show higher transmission of light.


Nyckelord

Biorefinery, Cellulose nanofiber, Nanofibrillated cellulose, Sawdust, TEMPO oxidization

Senast uppdaterad 2020-26-01 vid 03:59