Isolation of suberin from birch outer bark and cork using ionic liquids: A new source of macromonomers
authors Ferreira, R; Garcia, H; Sousa, AF; Freire, CSR; Silvestre, AJD; Rebelo, LPN; Pereira, CS
nationality International
journal INDUSTRIAL CROPS AND PRODUCTS
author keywords Suberin; Cork; Birch outer bark; Cholinium hexanoate ionic liquids
keywords NUCLEAR-MAGNETIC-RESONANCE; SOLID-STATE C-13-NMR; QUERCUS-SUBER; THERMOGRAVIMETRIC ANALYSIS; THERMAL-DECOMPOSITION; L. CORK; METHANOLYSIS; POLYESTER; GLYCERYL; MONOMERS
abstract Cholinium hexanoate, a biocompatible and biodegradable ionic liquid, was recently demonstrated to efficiently and selectively extract suberin domains from cork, combining high extraction efficiency with isolation of a partial depolymerised material. In the present paper, we report a comparative study of the characterisation of suberin extracted from birch outer bark and from cork using cholinium hexanoate. It became apparent that both extracted suberin samples showed still a cross-linked nature, i.e. likely to be closely related to in situ suberin. Suberin samples were mainly constituted by oligomeric or polymeric structures in turn essentially composed by long chain hydroxyacids monomers. Their high thermal stability together with the oligomeric/polymeric nature, open new perspectives for suberin use as macromonomers in the development of bio-based polymeric materials. This also contributes for the valorisation of suberin rich agro-forest residues. (C) 2012 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE BV
issn 0926-6690
year published 2013
volume 44
beginning page 520
ending page 527
digital object identifier (doi) 10.1016/j.indcrop.2012.10.002
web of science category Agricultural Engineering; Agronomy
subject category Agriculture
unique article identifier WOS:000315659400073
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journal impact factor 3.849
5 year journal impact factor 4.072
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