Surface modification of cellulose nanocrystals by grafting with poly(lactic acid)

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Title: Surface modification of cellulose nanocrystals by grafting with poly(lactic acid)
Authors: Peltzer, Mercedes Ana | Pei, Aihua | Zhou, Qi | Berglund, Lars | Jiménez, Alfonso
Research Group/s: Análisis de Polímeros y Nanomateriales
Center, Department or Service: Universidad de Alicante. Departamento de Química Analítica, Nutrición y Bromatología
Keywords: Cellulose nanocrystals | Surface modification | Grafting-from | Ring-opening polymerization | L-lactide
Knowledge Area: Química Analítica
Issue Date: Jun-2014
Publisher: Society of Chemical Industry
Citation: Polymer International. 2014, 63(6): 1056-1062. doi:10.1002/pi.4610
Abstract: The use of biopolymers obtained from renewable resources is currently growing and they have found unique applications as matrices and/or nanofillers in ‘green’ nanocomposites. Grafting of polymer chains to the surface of cellulose nanofillers was also studied to promote the dispersion of cellulose nanocrystals in hydrophobic polymer matrices. The aim of this study was to modify the surface of cellulose nanocrystals by grafting from L-lactide by ring-opening polymerization in order to improve the compatibility of nanocrystals and hydrophobic polymer matrices. The effectiveness of the grafting was evidenced by the long-term stability of a suspension of poly(lactic acid)-grafted cellulose nanocrystals in chloroform, by the presence of the carbonyl peak in modified samples determined by Fourier transform infrared spectroscopy and by the modification in C1s contributions observed by X-ray photoelectron spectroscopy. No modification in nanocrystal shape was observed in birefringence studies and transmission electron microscopy.
Sponsor: The authors gratefully acknowledge the financial support from the Spanish Ministry of Economy and Competitiveness (project Ref. MAT2011-28468-C02-01).
ISSN: 0959-8103 (Print) | 1097-0126 (Online)
DOI: 10.1002/pi.4610
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2013 Society of Chemical Industry
Peer Review: si
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Appears in Collections:INV - NANOBIOPOL - Artículos de Revistas

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