PoplarV1, Main, Exploration, bibRecord, 003207

Ionic liquid pretreatment of poplar wood at room temperature: swelling and incorporation of nanoparticles.

Identifieur interne : 003207 ( Main/Exploration ); précédent : 003206; suivant : 003208

Ionic liquid pretreatment of poplar wood at room temperature: swelling and incorporation of nanoparticles.

Auteurs : Marcel Lucas [États-Unis] ; Brian A. Macdonald ; Gregory L. Wagner ; Stephen A. Joyce ; Kirk D. Rector

Source :

ACS applied materials & interfaces [ 1944-8244 ] ; 2010.

RBID : pubmed:20735091

Descripteurs français

English descriptors

KwdEn :
- Biofuels (MeSH), Electron Probe Microanalysis (MeSH), Fluorescence (MeSH), Imidazoles (chemistry), Lignin (chemistry), Microscopy, Electron, Scanning (MeSH), Nanoparticles (MeSH), Paper (MeSH), Populus (chemistry), Silver Sulfadiazine (chemistry), Solvents (chemistry), Spectrum Analysis, Raman (MeSH), Temperature (MeSH), Waste Products (MeSH).
MESH :
- chemical , chemistry : Imidazoles, Lignin, Silver Sulfadiazine, Solvents.
- chemical : Biofuels, Waste Products.
- chemistry : Populus.
- Electron Probe Microanalysis, Fluorescence, Microscopy, Electron, Scanning, Nanoparticles, Paper, Spectrum Analysis, Raman, Temperature.

Abstract

Lignocellulosic biomass offers economic and environmental advantages over corn starch for biofuels production. However, its fractionation currently requires energy-intensive pretreatments, due to the lignin chemical resistance and complex cell wall structure. Recently, ionic liquids have been used to dissolve biomass at high temperatures. In this study, thin sections of poplar wood were swollen by ionic liquid (1-ethyl-3-methylimidazolium acetate) pretreatment at room temperature. The samples contract when rinsed with deionized water. The controlled expansion and contraction of the wood structure can be used to incorporate enzymes and catalysts deep into the wood structure for improved pretreatments and accelerated cellulose hydrolysis. As a proof of concept, silver and gold nanoparticles of diameters ranging from 20 to 100 nm were incorporated at depths up to 4 mum. Confocal surface-enhanced Raman images at different depths show that a significant number of nanoparticles were incorporated into the pretreated sample, and they remained on the samples after rinsing. Quantitative X-ray fluorescence microanalyses indicate that the majority of nanoparticle incorporation occurs after an ionic liquid pretreatment of less than 1 h. In addition to improved pretreatments, the incorporation of materials and chemicals into wood and paper products enables isotope tracing, development of new sensing, and imaging capabilities.

DOI: 10.1021/am100371q
PubMed: 20735091

Affiliations:

États-Unis

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Le document en format XML

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<author><name sortKey="Lucas, Marcel" sort="Lucas, Marcel" uniqKey="Lucas M" first="Marcel" last="Lucas">Marcel Lucas</name>
<affiliation wicri:level="1"><nlm:affiliation>Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA. mlucas@lanl.gov</nlm:affiliation>
<country xml:lang="fr">États-Unis</country>
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<author><name sortKey="Macdonald, Brian A" sort="Macdonald, Brian A" uniqKey="Macdonald B" first="Brian A" last="Macdonald">Brian A. Macdonald</name>
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<author><name sortKey="Wagner, Gregory L" sort="Wagner, Gregory L" uniqKey="Wagner G" first="Gregory L" last="Wagner">Gregory L. Wagner</name>
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<author><name sortKey="Joyce, Stephen A" sort="Joyce, Stephen A" uniqKey="Joyce S" first="Stephen A" last="Joyce">Stephen A. Joyce</name>
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<term>Fluorescence (MeSH)</term>
<term>Imidazoles (chemistry)</term>
<term>Lignin (chemistry)</term>
<term>Microscopy, Electron, Scanning (MeSH)</term>
<term>Nanoparticles (MeSH)</term>
<term>Paper (MeSH)</term>
<term>Populus (chemistry)</term>
<term>Silver Sulfadiazine (chemistry)</term>
<term>Solvents (chemistry)</term>
<term>Spectrum Analysis, Raman (MeSH)</term>
<term>Temperature (MeSH)</term>
<term>Waste Products (MeSH)</term>
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<keywords scheme="KwdFr" xml:lang="fr"><term>Analyse spectrale Raman (MeSH)</term>
<term>Biocarburants (MeSH)</term>
<term>Déchets (MeSH)</term>
<term>Fluorescence (MeSH)</term>
<term>Imidazoles (composition chimique)</term>
<term>Lignine (composition chimique)</term>
<term>Microanalyse par sonde électronique (MeSH)</term>
<term>Microscopie électronique à balayage (MeSH)</term>
<term>Nanoparticules (MeSH)</term>
<term>Papier (MeSH)</term>
<term>Populus (composition chimique)</term>
<term>Solvants (composition chimique)</term>
<term>Sulfadiazine d'argent (composition chimique)</term>
<term>Température (MeSH)</term>
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<keywords scheme="MESH" type="chemical" qualifier="chemistry" xml:lang="en"><term>Imidazoles</term>
<term>Lignin</term>
<term>Silver Sulfadiazine</term>
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<front><div type="abstract" xml:lang="en">Lignocellulosic biomass offers economic and environmental advantages over corn starch for biofuels production. However, its fractionation currently requires energy-intensive pretreatments, due to the lignin chemical resistance and complex cell wall structure. Recently, ionic liquids have been used to dissolve biomass at high temperatures. In this study, thin sections of poplar wood were swollen by ionic liquid (1-ethyl-3-methylimidazolium acetate) pretreatment at room temperature. The samples contract when rinsed with deionized water. The controlled expansion and contraction of the wood structure can be used to incorporate enzymes and catalysts deep into the wood structure for improved pretreatments and accelerated cellulose hydrolysis. As a proof of concept, silver and gold nanoparticles of diameters ranging from 20 to 100 nm were incorporated at depths up to 4 mum. Confocal surface-enhanced Raman images at different depths show that a significant number of nanoparticles were incorporated into the pretreated sample, and they remained on the samples after rinsing. Quantitative X-ray fluorescence microanalyses indicate that the majority of nanoparticle incorporation occurs after an ionic liquid pretreatment of less than 1 h. In addition to improved pretreatments, the incorporation of materials and chemicals into wood and paper products enables isotope tracing, development of new sensing, and imaging capabilities.</div>
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Ionic liquid pretreatment of poplar wood at room temperature: swelling and incorporation of nanoparticles.

Ionic liquid pretreatment of poplar wood at room temperature: swelling and incorporation of nanoparticles.

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

Pour générer des pages wiki