Issue 17, 2017

Synthesis of CO2-responsive cellulose nanocrystals by surface-initiated Cu(0)-mediated polymerisation

Abstract

Cellulose nanocrystals (CNC) were converted into a CO2-responsive composite nanomaterial by grafting poly(dimethylaminoethy methacrylate) (PDMAEMA) and poly(diethylaminoethyl methacrylate) (PDEAEMA) on its surface using a grafting-from approach via surface-initiated copper(0)-mediated polymerisation (SI-Cu(0)-ATRP). The Cu(0)-ATRP homopolymerisation kinetics of these monomers were first studied to determine suitable conditions to perform the grafting step. Reasonable molecular weight control and livingness were observed during the polymerisations. Following functionalization of the CNC with ATRP initiating groups, a grafting-from approach was employed to graft PDMAEMA and PDEAEMA onto the CNC surface. The surface charge of the graft-modified CNC could be reversibly switched by protonation/deprotonation of the tertiary amine groups simply by sparging with CO2 and N2, respectively.

Graphical abstract: Synthesis of CO2-responsive cellulose nanocrystals by surface-initiated Cu(0)-mediated polymerisation

Supplementary files

Article information

Article type
Paper
Submitted
16 6 2017
Accepted
01 8 2017
First published
01 8 2017

Green Chem., 2017,19, 4141-4152

Synthesis of CO2-responsive cellulose nanocrystals by surface-initiated Cu(0)-mediated polymerisation

J. Arredondo, P. G. Jessop, P. Champagne, J. Bouchard and M. F. Cunningham, Green Chem., 2017, 19, 4141 DOI: 10.1039/C7GC01798G

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