Characteristics of Hot Water Extracts from the Bark of Cultivated Willow (Salix sp.)

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Tutkijat

Organisaatiot

  • Åbo Akademi University
  • University of Wisconsin-Madison
  • University of Helsinki
  • Technical University of Berlin

Kuvaus

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 °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.

Yksityiskohdat

AlkuperäiskieliEnglanti
Sivut5566-5573
Sivumäärä8
JulkaisuACS Sustainable Chemistry and Engineering
Vuosikerta6
Numero4
TilaJulkaistu - 2 huhtikuuta 2018
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

ID: 18950159