Swelling and dissolution of cellulose. Part IV: Free floating cotton and wood fibres in ionic liquids

Cuissinat, Céline; Navard, Patrick; Heinze, Thomas

doi:10.1016/j.carbpol.2007.09.029

Cited by 118 publications

(74 citation statements)

References 7 publications

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“…The last authors identified four main dissolution modes for wood and cotton fibres as a function of the quality of the solvent by using Nmethylmorpholine N-oxide (NMMO) with various amounts of water. The same mechanisms were also observed when using solvents as NaOH-water with or without additives (Cuissinat and Navard 2006b), ionic liquids (Cuissinat et al 2008a) and other chemicals (Cuissinat 2006) for a wide range of plant fibres (Cuissinat and Navard 2008) and some cellulose derivatives that were prepared without dissolution (Cuissinat et al 2008b). From all these studies, it was shown that the key parameter in the dissolution mechanism is the morphology of the fibre: as long as the original wall structure of the native fibre is preserved, the dissolution mechanisms are mostly similar for wood, cotton, other plant fibres and some cellulose derivatives.…”

Section: Introductionmentioning

confidence: 67%

Dissolution mechanisms of wood cellulose fibres in NaOH–water

2009

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Abstract. Four wood pulps and a microcrystalline cellulose were dissolved in a NaOH 8% -water solution. Insoluble fractions and clear solution fractions were isolated by centrifugation and were observed by optical microscopy and transmission electron microscopy. Molecular weight distribution, carbohydrate composition and cellulose II content were measured. The dissolution of wood cellulose fibres in NaOH 8% -water solutions occurs by successive dismantlement and fragmentation steps governed by the swelling and the shearing of the original structure. The cellulose from insoluble and clear solution fractions is in both case converted in cellulose II and the insoluble fractions contain embedded mannans. Besides, the molecular weight distributions of cellulose from insoluble and clear solution fractions reveal the existence of heterogeneities in dissolution capacity of the cellulose chains, independent to the degree of polymerization, which are related to the chemical environment of the chains in the fibre structure.

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Section: Introductionmentioning

confidence: 67%

Dissolution mechanisms of wood cellulose fibres in NaOH–water

2009

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“…Cellulose dissolution in ionic liquids (IL) was intensively studied in recent years and is described in the literature (Swatloski et al 2002;Remsing et al 2006;Novoselov et al 2007;Cuissinat et al 2008b;Kosan et al 2008) as a promising technique. The presented results show that 1-butyl-3-methylimidazolium chloride ([BMIM]Cl) is an efficient cellulose solvents and could be used also for wood dissolution (Fort et al 2007;Kilpeläinen et al 2007) as an alternative for classical (not environment friendly) paper and textile industry processes and similar techniques, a medium for preparation of cellulose and its derivatives, or even 13 C analysis.…”

Section: Introductionmentioning

confidence: 99%

Alternative Methods for Cellulose Preparation for AMS Measurement

Němec

Wacker²,

Hajdas³

et al. 2010

Radiocarbon

113

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ABSTRACT.The main methods applied to clean plant material for radiocarbon dating are not compound-specific and generally remove only the easily exchangeable components by an acid-base-acid sequence and additional optional steps like Soxhlet extraction to remove resins and oxidative bleaching with NaClO 2 . The products are normally clean enough for standard 14 C measurement, but in some cases it is desirable to have pure cellulose, which remains unchanged and immobile over longer time ranges, better representing the original plant material. In this work, 2 more compound-specific but still simple methods were tested to separate the cellulose from wood. The viscose method is based on the xanthification process used in the textile industry, where the alkali-cellulose with CS 2 forms a soluble cellulose xanthate, which is then extracted and cellulose is recovered. The second procedure is based on the wood/cellulose dissolution in ionic liquid 1-butyl-3-methylimidazolium chloride [BMIM]Cl, when the dissolved cellulose could be precipitated again by simply adding a water-acetone mixture. This process was recently reported, but still not used in sample preparation procedures for 14 C dating.

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“…The quality of ILs for wood and cellulose fibres can range from Mode 1 to Mode 4. 1-n-butyl-3-methylimidazolium chloride, C 4 mimCl showed the best media for cotton and wood fibre with disintegration of small fragments and dissolves in C 4 mimCl (Mode 1) [15]. 1-ethyl-3-methylimidazolium chloride, EmimCl and 1-butyl-3-methylimidazolium chloride, BmimCl shows swelling by ballooning with dissolution occurred for cellulose fibre (Mode 2) [16].…”

Section: Resultsmentioning

confidence: 99%

Deep Eutectic Solvent as a Media in Swelling and Dissolution of Oil Palm Trunk

2017

MJAS

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Pre-treatment is a crucial step in biomass processing prior to the hydrolysis or fermentation to bioethanol. Herein, the potential of deep eutectic solvent (DES) in the pretreatment of oil palm biomass were described. The mechanism of swelling and dissolution of oil palm trunk (OPT) was studied under optical microscopy. The OPT fibres were stirred and heated at 100 °C in choline chloride:glycerol (ChCl:Gly), choline chloride:ethylene glycol (ChCl:EG), ethylammonium chloride:glycerol (EAC:Gly) and ethylammonium chloride:ethylene glycol (EAC:EG) with 1:2 molar ratio each. All DESs tested had showed homogenous swelling and disintegration of small fragments interaction mode with OPT. There were more small fragments observed in EACbased DES compared to ChCl-based DES. This finding supports the result for the percentage of dissolution where OPT in EACbased DES recorded higher dissolution with 55% and 50% in EAC:EG and EAC:Gly respectively whereas ChCl-based DES recorded only 33% and 29% in ChCl:EG and ChCl:Gly, respectively. In ChCl-based DESs the fragmentations were accompanied by large unswollen section of fibres. The formation of small fragments indicates that the fibres experienced a fast dissolution. Therefore, the EAC-based DESs proved to be a better swelling and dissolution media for oil palm biomass pretreatment compared to ChCl-based DES.Keywords: deep eutectic solvent, oil palm biomass, dissolution, swelling, pre-treatment Abstrak Pra-rawat adalah satu langkah dalam pemprosesan biomas sebelum hidrolisis atau fermentasi kepada bioetanol. Disini, potensi pelarut eutektik (DES) dalam pra-rawat biomas kelapa sawit telah diterangkan. Mekanisma pembengkakan dan pemelarutan batang kelapa sawit (OPT) telah dikaji dengan mikroskop optik. Fiber OPT telah dikacau dan dipanaskan pada suhu 100 ºC dalam kolin klorida:gliserol (ChCl:Gly), kolin klorida:etilin glikol (ChCl:EG), etilammonium klorida: gliserol (EAC:Gly) dan etilammonium klorida: etilin glikol (EAC:EG) dengan kadar molar 1:2 setiap satu. Semua DES yang dikaji telah menunjukkan mod interaksi pembengkakan secara setara dan pecahan fragmen kecil dengan OPT. Lebih banyak fragmen kecil dapat dilihat dalam DES berasaskan EAC berbanding dengan DES berasaskan ChCl. Ini disokong oleh peratusan pelarutan dimana OPT dalam DES berasaskan EAC menunjukkan keputusan lebih tinggi dengan masing -masing 55% dan 50% dalam EAC:EG and EAC:Gly sementara DES berasaskan ChCl hanya menunjukkan masing -masing 33% dan 29% dalam ChCl:EG dan ChCl:Gly. Bagi DES berasaskan ChCl, fragmentasi adalah disertai dengan kehadiran fiber besar yang tiada pembengkakan. Pembentukkan fragmen kecil menunjukkan bahawa fiber mengalami pelarutan yang cepat. Oleh itu, DES berasaskan EAC terbukti lebih baik sebagai media pembengkakan dan pelarutan bagi OPT berbanding DES berasaskan ChCl.Kata kunci: pelarut eutektik, biomas kelapa sawit, pelarutan, pembengkakan, prarawat ISSN -2506 Emilia et al: DEEP EUTECTIC SOLVENT AS A MEDIA IN SWELLING AND DISSOLUTION OF OIL PALM TRUNK 21Introduction Deep eutectic...

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Swelling and dissolution of cellulose. Part IV: Free floating cotton and wood fibres in ionic liquids

Cited by 118 publications

References 7 publications

Dissolution mechanisms of wood cellulose fibres in NaOH–water

Dissolution mechanisms of wood cellulose fibres in NaOH–water

Alternative Methods for Cellulose Preparation for AMS Measurement

Deep Eutectic Solvent as a Media in Swelling and Dissolution of Oil Palm Trunk

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