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Materials 2013, 6(5), 2043-2058; doi:10.3390/ma6052043
Article

Posidonia oceanica as a Renewable Lignocellulosic Biomass for the Synthesis of Cellulose Acetate and Glycidyl Methacrylate Grafted Cellulose

,
 and
*
Department of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, via Mancinelli 7, Milan 20131, Italy
* Author to whom correspondence should be addressed.
Received: 18 February 2013 / Revised: 2 May 2013 / Accepted: 7 May 2013 / Published: 15 May 2013
(This article belongs to the Special Issue Advances in Cellulosic Materials)
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Abstract

High-grade cellulose (97% α-cellulose content) of 48% crystallinity index was extracted from the renewable marine biomass waste Posidonia oceanica using H2O2 and organic peracids following an environmentally friendly and chlorine-free process. This cellulose appeared as a new high-grade cellulose of waste origin quite similar to the high-grade cellulose extracted from more noble starting materials like wood and cotton linters. The benefits of α-cellulose recovery from P. oceanica were enhanced by its transformation into cellulose acetate CA and cellulose derivative GMA-C. Fully acetylated CA was prepared by conventional acetylation method and easily transformed into a transparent film. GMA-C with a molar substitution (MS) of 0.72 was produced by quenching Fenton’s reagent (H2O2/FeSO4) generated cellulose radicals with GMA. GMA grafting endowed high-grade cellulose from Posidonia with adsorption capability. GMA-C removes β-naphthol from water with an efficiency of 47%, as measured by UV-Vis spectroscopy. After hydrolysis of the glycidyl group to glycerol group, the modified GMA-C was able to remove p-nitrophenol from water with an efficiency of 92%, as measured by UV-Vis spectroscopy. α-cellulose and GMA-Cs from Posidonia waste can be considered as new materials of potential industrial and environmental interest.
Keywords: Posidonia oceanica; egagropili; high grade cellulose; crystallinity index; cellulose acetate; glycidyl methacrylate grafted cellulose; wastewater treatment Posidonia oceanica; egagropili; high grade cellulose; crystallinity index; cellulose acetate; glycidyl methacrylate grafted cellulose; wastewater treatment
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Coletti, A.; Valerio, A.; Vismara, E. Posidonia oceanica as a Renewable Lignocellulosic Biomass for the Synthesis of Cellulose Acetate and Glycidyl Methacrylate Grafted Cellulose. Materials 2013, 6, 2043-2058.

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