Green process for green materials: viable low-temperature lipase-catalysed synthesis of renewable telechelics in supercritical CO2

Curia, S. and Barclay, A.F. and Torron, S. and Johansson, M. and Howdle, S.M. (2015) Green process for green materials: viable low-temperature lipase-catalysed synthesis of renewable telechelics in supercritical CO2. Philosophical Transactions A: Mathematical, Physical and Engineering Sciences, 373 (2057). pp. 1-16. ISSN 1471-2962

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Abstract

We present a novel near ambient temperature approach to telechelic renewable polyesters by exploiting the unique properties of supercritical CO2 (scCO2). Bio-based commercially available monomers have been polymerised and functional telechelic materials with targeted molecular weight were prepared by end-capping the chains with molecules containing reactive moieties in a one-pot reaction. The use of scCO2 as a reaction medium facilitates the effective use of Candida Antarctica Lipase B (CaLB) as a catalyst at a temperature as low as 35 °C, hence avoiding side reactions, maintaining the end-capper functionality and preserving the enzyme activity.

The functionalised polymer products have been characterised by 1H-NMR, MALDI-TOF, GPC and DSC in order to carefully assess their structural and thermal properties.

We demonstrate that telechelic materials can be produced enzymatically at mild temperatures, in a solvent-free system and using renewably sourced monomers without pre-modification, by exploiting the unique properties of scCO2. The macromolecules we prepare are ideal green precursors that can be further reacted to prepare useful bio-derived films and coatings.

Item Type: Article
Keywords: Azelaic acid, Supercritical CO2, Lipase, Telechelics
Schools/Departments: University of Nottingham, UK > Faculty of Science > School of Chemistry
Identification Number: https://doi.org/10.1098/rsta.2015.0073
Depositing User: Bramwell, Roseanna
Date Deposited: 26 Nov 2015 10:55
Last Modified: 19 Nov 2016 20:47
URI: http://eprints.nottingham.ac.uk/id/eprint/30870

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