Journal
POLYMER CHEMISTRY
Volume 2, Issue 9, Pages 2010-2020Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1py00086a
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Funding
- Danish Agency for Science Technology and Innovation [09-065804]
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The chemical modification of birch wood xylan was undertaken in the ionic liquid 1-n-butyl-3-methylimidazolium chloride (C(4)mimCl) using three different long-chain succinic anhydrides: n-octenyl succinic anhydride (n-OSA), n-dodecenyl succinic anhydride (n-DDSA) and n-octadecenyl succinic anhydride (n-ODSA). Reactions were performed at temperatures of 80-100 degrees C and reaction times of 0.5-22 hours resulting in a degree of substitution (DS) of 0.08-0.27. The formation of the desired products was confirmed through the use of H-1 NMR and FT-IR, while DS was determined by titration. Thermogravimetric analysis of the modified and native xylans showed a slight lowering of thermal stability with functionalization. Contact angle measurements on spin-coated surfaces of modified xylan films showed a significant increase in hydrophobicity with the introduction of the alkenyl-functionalized succinic anhydride moieties.
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