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

Sanna, Roberta and Fortunati, Elena and Alzari, Valeria and Nuvoli, Daniele and Terenzi, Andrea and Casula, Maria Francesca and Kenny, José Maria and Mariani, Alberto (2013) Poly(N-vinylcaprolactam) nanocomposites containing nanocrystalline cellulose: a green approach to thermoresponsive hydrogels. Cellulose, Vol. 20 (5), p. 2393-2402. ISSN 0969-0239. eISSN 1572-882X. Article.

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DOI: 10.1007/s10570-013-9988-1

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.

Item Type:Article
ID Code:9230
Status:Published
Refereed:Yes
Uncontrolled Keywords:Nanocellulose, stimuli responsive hydrogel, frontal polymerization, nanocomposite systems, hydrogels
Subjects:Area 03 - Scienze chimiche > CHIM/04 Chimica industriale
Divisions:001 Università di Sassari > 01-a Nuovi Dipartimenti dal 2012 > Chimica e Farmacia
Publisher:Springer Netherlands
ISSN:0969-0239
eISSN:1572-882X
Copyright Holders:© 2013 Springer Science+Business Media Dordrecht
Deposited On:01 Oct 2013 13:13

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