APPLICATION OF DES (DEEP EUTECTIC SOLVENTS) TO WOOD EXTRACTIVES

Yıl 2019, Cilt: 1 Sayı: 2, 52 - 56, 25.12.2019

Ayben Kılıç-pekgözlü , Esra Ceylan

Öz

Deep eutectic solvents (DES), known as environmentally friendly,
recyclable, non-poisonous, low volatile, non-flammable and harmless are first
found by Abbott et al. in 2003. In the last decade, scientists are working with
DES in different areas. Mainly, they focus on isolation of cellulose and
lignin. Regard to extractives, to the best of our knowledge DES was not studied
before. In this study, it was aimed to determine the extractive composition of
Scotch pine with deep eutectic solvents.

Pinus sylvestris L. was used as wood material.  As deep eutectic solvent (DES) Choline
chloride (Merck 5.00117), ethylene glycol (Merck 1.00949) and urea (Merck
1.08487) were used with molar ratio of choline chloride; ethylene glycol (1:2
m/m), and choline chloride: urea (1:2 m/m). Sequential soxhelet extraction was
performed first with n-hexane and then acetone-water with 5 g wood sample for 6
hours. With DES two extractions were performed in an ultrasonic (UB) and
hot-water bath (HWB) at 60°C for 30 min. 0.05 g wood samples were used for
these extractions. Identification and quantification were done with GC-MS and
FID-GC.

Similar results were obtained with DES and organic solvents. Fatty acids,
resin acids and stilbenes are the main chemical groups. Oleic acid (1.4-9%),
linoleic acid (1.6-8%) and levopimaric acid (0.6-17.7%) are dominant compounds,
found in all extracts. Also, monomethyl pinosylvin (51.5%) was found in
acetone: water mixture. DES can be an alternative to organic solvents in wood
extraction.

Anahtar Kelimeler

Deep Eutectic Solvents( DES), Extractives

Destekleyen Kurum

Bartın University

Proje Numarası

2018-FEN-A-006

Teşekkür

This study is a part of a project 2018-FEN-A-006 supported by Bartin University

Kaynakça

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