Crosslinking of Cellulose by Olefin Metathesis

Joly, Nicolas; Granet, Robert; Krausz, Pierre

doi:10.1081/car-120019013

Cited by 21 publications

(12 citation statements)

References 16 publications

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“…Cellulose was dissolved by a method described elsewhere, [36] consisting of solvent-exchange using methanol and DMAc successively to remove the water trapped within the cellulose structure. The treated cellulose was added to a solution of 6.7 % LiCl/DMAc (w/v) and stirred until it had completely dissolved (12 h, 70 8C).…”

Section: Dissolution Of Cellulosementioning

confidence: 99%

Synthesis of Cellulose Fatty Esters as Plastics—Influence of the Degree of Substitution and the Fatty Chain Length on Mechanical Properties

Crépy¹,

Chaveriat²,

Banoub

et al. 2009

ChemSusChem

123

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Alternative films: The effect of the chain length and the degree of substitution on the mechanical and hydrophobic properties of various cellulose fatty ester plastic films was studied. The results suggest that the cellulose ester plastic films are promising alternatives to petrochemical commodity plastics such as polyethylene.Cellulose-based plastic films were prepared by acylating cellulose in homogeneous media under microwave irradiation with fatty acyl chlorides containing either saturated or unsaturated chains of various lengths (C(12) to C(18)). The resultant cellulose esters were analysed by FTIR and (1)H NMR spectroscopy to confirm their structure and to determine their degree of substitution. Some of the cellulose fatty esters were then converted into polymer films by casting. The mechanical properties of these films were determined, including their elastic modulus, tensile strength and tensile strain level. The hydrophobicity of the polymer films was determined by contact angle measurement with water. The mechanical and hydrophobic properties of the plastic films were then compared to those of commodity plastics.

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Section: Dissolution Of Cellulosementioning

confidence: 99%

Synthesis of Cellulose Fatty Esters as Plastics—Influence of the Degree of Substitution and the Fatty Chain Length on Mechanical Properties

Crépy¹,

Chaveriat²,

Banoub

et al. 2009

ChemSusChem

123

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“…A conventional microwave oven gave appreciatively the same results. [26] This study was achieved with esters purified by the dissolution-precipitation method. We compared these esters with esters obtained with another purification method.…”

Section: Synthesismentioning

confidence: 99%

“…Cellulose chemical modifications occur more easily in amorphous regions than in crystalline ones [2]. Homogeneous derivatization needs either activation [3] or solubilization [4][5][6][7][8][9][10][11][12][13][14][15] of the polymer before its modification [16,17].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and properties of biodegradable plastic films obtained by microwave-assisted cellulose acylation in homogeneous phase

Satgé

Granet

Verneuil

et al. 2004

Comptes Rendus. Chimie

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“…Microcrystalline cellulose was dissolved as described elsewhere,12, 13 and consisted of a solvent exchange with, successively, methanol and DMAc to remove the water trapped in the cellulose structure. This treated cellulose was then added to a solution of 6.7% LiCl/DMAc (w/v) and stirred until complete dissolution occurred (2–3 h).…”

Section: Methodsmentioning

confidence: 99%

Olefin metathesis applied to cellulose derivatives—Synthesis, analysis, and properties of new crosslinked cellulose plastic films

Joly

Granet

Krausz

2004

J. Polym. Sci. A Polym. Chem.

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New crosslinked cellulose‐based plastic films were synthesized with olefin metathesis as a crosslinking reaction. Microcrystalline cellulose was first dissolved in a lithium chloride/N,N‐dimethylacetamide solvent system and acylated by ω‐undecenoyl chloride under microwave irradiation with N,N‐dimethyl‐4‐aminopyridine as the catalyst. Cellulose unsaturated fatty acyl esters with a degree of substitution (DS) ranging from 1.4 to 2.0 were then crosslinked by olefin metathesis with a first generation Grubbs catalyst. Crosslinking ratios (T) ranging from 20 to 90% were obtained for low catalyst amounts (<1.2%), but gels appeared when T was too high. To avoid this gel formation, cellulose was acylated with a mixture of lauroyl and ω‐undecenoyl chlorides. This internal dilution allowed us to obtain films of every case and various T (varying from 10 to 80% for a catalyst amount below 3.5%). Plastics were characterized by Fourier transform infrared (FTIR) spectroscopy, and the fatty acid mixture resulting from the hydrolysis of cellulose esters were analyzed by gas chromatography (GC) and NMR spectroscopy. Mechanical properties showed that the elastic modulus and tensile failure stress was higher when the plastic films were crosslinked. © 2004 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 43: 407–418, 2005

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Crosslinking of Cellulose by Olefin Metathesis

Cited by 21 publications

References 16 publications

Synthesis of Cellulose Fatty Esters as Plastics—Influence of the Degree of Substitution and the Fatty Chain Length on Mechanical Properties

Synthesis of Cellulose Fatty Esters as Plastics—Influence of the Degree of Substitution and the Fatty Chain Length on Mechanical Properties

Synthesis and properties of biodegradable plastic films obtained by microwave-assisted cellulose acylation in homogeneous phase

Olefin metathesis applied to cellulose derivatives—Synthesis, analysis, and properties of new crosslinked cellulose plastic films

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