APPLICATION OF DES (DEEP EUTECTIC SOLVENTS) TO WOOD EXTRACTIVES

Authors : Ayben KILIÇPEKGÖZLÜ, Esra CEYLAN

Pages : 52-56

View : 22 | Download : 10

Publication Date : 2019-12-25

Article Type : Conference Paper

Abstract :Deep eutectic solvents insert ignore into journalissuearticles values(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 insert ignore into journalissuearticles values(DES); Choline chloride insert ignore into journalissuearticles values(Merck 5.00117);, ethylene glycol insert ignore into journalissuearticles values(Merck 1.00949); and urea insert ignore into journalissuearticles values(Merck 1.08487); were used with molar ratio of choline chloride; ethylene glycol insert ignore into journalissuearticles values(1:2 m/m);, and choline chloride: urea insert ignore into journalissuearticles values(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 insert ignore into journalissuearticles values(UB); and hot-water bath insert ignore into journalissuearticles values(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 insert ignore into journalissuearticles values(1.4-9%);, linoleic acid insert ignore into journalissuearticles values(1.6-8%); and levopimaric acid insert ignore into journalissuearticles values(0.6-17.7%); are dominant compounds, found in all extracts. Also, monomethyl pinosylvin insert ignore into journalissuearticles values(51.5%); was found in acetone: water mixture. DES can be an alternative to organic solvents in wood extraction.
Keywords : Deep Eutectic Solvents DES, Extractives