Characteristics of hot water extracts from the bark of cultivated willow (Salix sp.)

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)


Interna författare/redaktörer


Publikationens författare: Jinze Dou, Wenyang Xu, Jari J. Koivisto, Justin K. Mobley, Dharshana Padmakshan, Martin Kögler, Chunlin Xu, Stefan Willför, John Ralph, Tapani Vuorinen
Förläggare: ACS
Publiceringsår: 2018
Tidskrift: ACS Sustainable Chemistry and Engineering
Tidskriftsakronym: ACS Sustainable Chem. Eng.
Volym: 6
Nummer: 4
Artikelns första sida, sidnummer: 5566
Artikelns sista sida, sidnummer: 5573
Antal sidor: 15
ISSN: 2168-0485
eISSN: 2168-0485


Abstrakt

Willow bark is a rich source of heterogeneous polyphenolic compounds and a potential feedstock for biorefinery processes aiming at chemicals and fiber production. Here, mild hot water treatment of willow hybrid Karin was studied to find a practical means of isolating its non-cell-wall components for their utilization in a willow biorefinery proposed to aid valorization of the willow biomass. A short aqueous treatment of the bark at 80 degrees C liberated the extract in >20% yield under unpressurized conditions. The extract was characterized using mainly gas chromatography-mass spectrometry and one- and two-dimensional NMR techniques. Authentic analytes were applied to confirm the identification and quantification of the main components that were picein, (+)-catechin, triandrin, glucose, and fructose. Fructose was converted into 5-hydroxymethylfurfural in an acidic treatment which led to its condensation with the phenolic components and formation of a recalcitrant precipitate that should be avoided.


Nyckelord

5-Hydroxymethylfurfural, (+)-Catechin, Fructose, Picein, Triandrin, Willow bark

Senast uppdaterad 2019-15-10 vid 02:38