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Published in: Cellulose 5/2013

01-10-2013 | Original Paper

Poly(N-vinylcaprolactam) nanocomposites containing nanocrystalline cellulose: a green approach to thermoresponsive hydrogels

Authors: Roberta Sanna, Elena Fortunati, Valeria Alzari, Daniele Nuvoli, Andrea Terenzi, Maria Francesca Casula, Josè Maria Kenny, Alberto Mariani

Published in: Cellulose | Issue 5/2013

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Abstract

In this work, we report on the synthesis and characterization of thermoresponsive poly(N-vinylcaprolactam), PNVCL, nanocomposite hydrogels containing nanocrystalline cellulose (CNC) by the use of frontal polymerization technique, which is a convenient, easy and low energy-consuming method of macromolecular synthesis. CNC was obtained by acid hydrolysis of commercial microcrystalline cellulose and dispersed in dimethylsulfoxide. The dispersion was characterized by TEM analysis and mixed with suitable amounts of N-vinylcaprolactam for the synthesis of PNVCL nanocomposite hydrogels having a CNC concentration ranging between 0.20 and 2.0 wt%. The nanocomposite hydrogels were analyzed by SEM and their swelling and rheological features were investigated. It was found that CNC decreases the swelling ratio even at small concentration. The rheological properties of the hydrogels indicated that CNC strongly influenced the viscoelastic modulus, even at concentrations as low as 0.1 wt%: both G′ and G″, and the viscosity increase with CNC content, indicating that the nanocellulose has a great potential to reinforce PNVCL polymer hydrogels.

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Metadata
Title
Poly(N-vinylcaprolactam) nanocomposites containing nanocrystalline cellulose: a green approach to thermoresponsive hydrogels
Authors
Roberta Sanna
Elena Fortunati
Valeria Alzari
Daniele Nuvoli
Andrea Terenzi
Maria Francesca Casula
Josè Maria Kenny
Alberto Mariani
Publication date
01-10-2013
Publisher
Springer Netherlands
Published in
Cellulose / Issue 5/2013
Print ISSN: 0969-0239
Electronic ISSN: 1572-882X
DOI
https://doi.org/10.1007/s10570-013-9988-1

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