Homogeneous esterification of poplar wood in an ionic liquid under mild conditions: characterization and properties.
Identifieur interne : 003229 ( Main/Exploration ); précédent : 003228; suivant : 003230Homogeneous esterification of poplar wood in an ionic liquid under mild conditions: characterization and properties.
Auteurs : Tong-Qi Yuan [République populaire de Chine] ; Shao-Ni Sun ; Feng Xu ; Run-Cang SunSource :
- Journal of agricultural and food chemistry [ 1520-5118 ] ; 2010.
Descripteurs français
- KwdFr :
- MESH :
- composition chimique : Bois, Liquides ioniques, Populus.
- Biotechnologie, Estérification, Température.
English descriptors
- KwdEn :
- MESH :
- chemical , chemistry : Ionic Liquids.
- chemistry : Populus, Wood.
- Biotechnology, Esterification, Temperature.
Abstract
Wood meal was completely dissolved under constant conditions (130 °C, 6 h) in the ionic liquid 1-butyl-3-methylimidazolium chloride ([C4mim]Cl), and the various factors and potential mechanism of the homogeneous esterification of wood in this reaction medium were mainly studied. The physicochemical properties of the esterified wood were also investigated. It has been shown that highly substituted wood esters could be obtained by reacting wood dissolved in [C(4)mim]Cl with octanoyl chloride in the presence of triethylamine as a neutralizer. The weight percent gain was arranged from 121.5% to 297.4%. All reactions were performed under mild conditions, low excess of reagent, and a short reaction time compared to the heterogeneous chemical modification. Meanwhile, characterization of the derivatives confirmed that the homogeneous esterification was successfully processed. It was also found that thermal stability and morphological properties of the esterified wood were significantly different from those in previous reports. Octanoylation of wood meal in the [C(4)mim]Cl homogeneous system reduced the initial temperature of their thermal degradation and decreased the thermal stability compared to those in unmodified wood meal. Furthermore, the fibrillar appearance of wood meal changed into a relatively more homogeneous macrostructure of the esterfied wood. All these results suggested that homogeneous esterification of poplar wood in [C(4)mim]Cl would enhance the compatibility and improve the processability of wood with synthetic polymers.
DOI: 10.1021/jf103050t
PubMed: 20932034
Affiliations:
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Le document en format XML
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The physicochemical properties of the esterified wood were also investigated. It has been shown that highly substituted wood esters could be obtained by reacting wood dissolved in [C(4)mim]Cl with octanoyl chloride in the presence of triethylamine as a neutralizer. The weight percent gain was arranged from 121.5% to 297.4%. All reactions were performed under mild conditions, low excess of reagent, and a short reaction time compared to the heterogeneous chemical modification. Meanwhile, characterization of the derivatives confirmed that the homogeneous esterification was successfully processed. It was also found that thermal stability and morphological properties of the esterified wood were significantly different from those in previous reports. Octanoylation of wood meal in the [C(4)mim]Cl homogeneous system reduced the initial temperature of their thermal degradation and decreased the thermal stability compared to those in unmodified wood meal. Furthermore, the fibrillar appearance of wood meal changed into a relatively more homogeneous macrostructure of the esterfied wood. All these results suggested that homogeneous esterification of poplar wood in [C(4)mim]Cl would enhance the compatibility and improve the processability of wood with synthetic polymers.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">20932034</PMID><DateCompleted><Year>2014</Year><Month>11</Month><Day>06</Day></DateCompleted><DateRevised><Year>2014</Year><Month>02</Month><Day>05</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1520-5118</ISSN><JournalIssue CitedMedium="Internet"><Volume>58</Volume><Issue>21</Issue><PubDate><Year>2010</Year><Month>Nov</Month><Day>10</Day></PubDate></JournalIssue><Title>Journal of agricultural and food chemistry</Title><ISOAbbreviation>J Agric Food Chem</ISOAbbreviation></Journal><ArticleTitle>Homogeneous esterification of poplar wood in an ionic liquid under mild conditions: characterization and properties.</ArticleTitle><Pagination><MedlinePgn>11302-10</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1021/jf103050t</ELocationID><Abstract><AbstractText>Wood meal was completely dissolved under constant conditions (130 °C, 6 h) in the ionic liquid 1-butyl-3-methylimidazolium chloride ([C4mim]Cl), and the various factors and potential mechanism of the homogeneous esterification of wood in this reaction medium were mainly studied. The physicochemical properties of the esterified wood were also investigated. It has been shown that highly substituted wood esters could be obtained by reacting wood dissolved in [C(4)mim]Cl with octanoyl chloride in the presence of triethylamine as a neutralizer. The weight percent gain was arranged from 121.5% to 297.4%. All reactions were performed under mild conditions, low excess of reagent, and a short reaction time compared to the heterogeneous chemical modification. Meanwhile, characterization of the derivatives confirmed that the homogeneous esterification was successfully processed. It was also found that thermal stability and morphological properties of the esterified wood were significantly different from those in previous reports. Octanoylation of wood meal in the [C(4)mim]Cl homogeneous system reduced the initial temperature of their thermal degradation and decreased the thermal stability compared to those in unmodified wood meal. Furthermore, the fibrillar appearance of wood meal changed into a relatively more homogeneous macrostructure of the esterfied wood. All these results suggested that homogeneous esterification of poplar wood in [C(4)mim]Cl would enhance the compatibility and improve the processability of wood with synthetic polymers.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Yuan</LastName><ForeName>Tong-Qi</ForeName><Initials>TQ</Initials><AffiliationInfo><Affiliation>Institute of Biomass Chemistry and Technology, Beijing Forestry University, Beijing, China.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Sun</LastName><ForeName>Shao-Ni</ForeName><Initials>SN</Initials></Author><Author ValidYN="Y"><LastName>Xu</LastName><ForeName>Feng</ForeName><Initials>F</Initials></Author><Author ValidYN="Y"><LastName>Sun</LastName><ForeName>Run-Cang</ForeName><Initials>RC</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2010</Year><Month>10</Month><Day>08</Day></ArticleDate></Article><MedlineJournalInfo><Country>United States</Country><MedlineTA>J Agric Food Chem</MedlineTA><NlmUniqueID>0374755</NlmUniqueID><ISSNLinking>0021-8561</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D052578">Ionic Liquids</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D001709" MajorTopicYN="N">Biotechnology</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D004951" MajorTopicYN="N">Esterification</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D052578" MajorTopicYN="N">Ionic Liquids</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="Y">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D032107" MajorTopicYN="N">Populus</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="Y">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D013696" MajorTopicYN="N">Temperature</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D014934" MajorTopicYN="N">Wood</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="Y">chemistry</QualifierName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="entrez"><Year>2010</Year><Month>10</Month><Day>12</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2010</Year><Month>10</Month><Day>12</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2014</Year><Month>11</Month><Day>7</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">20932034</ArticleId><ArticleId IdType="doi">10.1021/jf103050t</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>République populaire de Chine</li></country><settlement><li>Pékin</li></settlement></list><tree><noCountry><name sortKey="Sun, Run Cang" sort="Sun, Run Cang" uniqKey="Sun R" first="Run-Cang" last="Sun">Run-Cang Sun</name><name sortKey="Sun, Shao Ni" sort="Sun, Shao Ni" uniqKey="Sun S" first="Shao-Ni" last="Sun">Shao-Ni Sun</name><name sortKey="Xu, Feng" sort="Xu, Feng" uniqKey="Xu F" first="Feng" last="Xu">Feng Xu</name></noCountry><country name="République populaire de Chine"><noRegion><name sortKey="Yuan, Tong Qi" sort="Yuan, Tong Qi" uniqKey="Yuan T" first="Tong-Qi" last="Yuan">Tong-Qi Yuan</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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