Lignin effect in castor oil-based elastomers: Reaching new limits in rheological and cushioning behaviors

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2021-02-08
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Mcode
Degree programme
Language
en
Pages
Series
Composites Science and Technology, Volume 203
Abstract
Lignin is demonstrated as an unprecedented reinforcing material that tailors the rheological and cushioning properties of castor oil-based polyurethane elastomers, expanding their viscoelastic moduli by four orders of magnitude. The tensile strain at break was triplicated in the presence of lignin while the Young modulus and the stress at break were enhanced 17- and 7-fold, respectively. Remarkably, in compression tests, lignin addition increased the stresses at break by more than 88-fold, whereas the strain at failure shifted from 50 to 93%. Dynamic mechanical compression tests indicated outstanding cushioning and resistance performance. Overall, the results demonstrate a performance not reached before for biosourced elastomeric materials, fitting the demands of a wide range of applications.
Description
Keywords
polymer-matrix composites, particle-reinforcement, rheological properties, mechanical testing, bio-based composites
Other note
Citation
Borrero Lopez, A M, Wang, L, Valencia, C, Franco, J M & Rojas, O 2021, ' Lignin effect in castor oil-based elastomers: Reaching new limits in rheological and cushioning behaviors ', Composites Science and Technology, vol. 203, 108602 . https://doi.org/10.1016/j.compscitech.2020.108602