Shear-induced phase transitions in sucrose ester surfactant.
Identifieur interne : 000052 ( Ncbi/Checkpoint ); précédent : 000051; suivant : 000053Shear-induced phase transitions in sucrose ester surfactant.
Auteurs : Véronique M. Sadtler [France] ; Michèle Guely ; Philippe Marchal ; Lionel ChoplinSource :
- Journal of colloid and interface science [ 0021-9797 ] ; 2004.
Abstract
The behavior of a commercial sucrose stearate blend has been examined by means of various experimental techniques (differential scanning calorimetry, light polarization and electron microscopy, and rotational rheometry). A partial phase diagram in water has been established. It shows that the binary system forms a lamellar lyotropic mesophase and that the melting behavior is characterized by a lamellar gel-lamellar liquid crystalline phase transition. The identification of the liquid crystalline phase has been carried out from textural observation using polarization microscopy and freeze-fracture electron microscopy. At low surfactant concentrations, the phase transition has been followed through rheological experiments. Furthermore, a shear-induced transition, from the lamellar phase (sheets of surfactant bilayers including a few large multilamellar vesicles) to an onion phase, has been observed above a critical temperature of 43 degrees C. The vesicles so obtained did not relax over more than 3 weeks. The presence of a small ratio of distearate in the sugar ester blend seems to be the key to vesicle formation at low surface-active material concentration.
PubMed: 14697688
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Sadtler</name><affiliation wicri:level="3"><nlm:affiliation>Centre de Génie Chimique des Milieux Rhéologiquement Complexes, GEMICO-Groupe ENSIC, 1 rue Grandville, BP 451, F-54001 Cedex, Nancy, France. veronique.sadtler@ensic.inpl-nancy.fr</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>Centre de Génie Chimique des Milieux Rhéologiquement Complexes, GEMICO-Groupe ENSIC, 1 rue Grandville, BP 451, F-54001 Cedex, Nancy</wicri:regionArea><placeName><region type="region">Grand Est</region><region type="old region">Lorraine (région)</region><settlement type="city">Nancy</settlement></placeName></affiliation></author><author><name sortKey="Guely, Michele" sort="Guely, Michele" uniqKey="Guely M" first="Michèle" last="Guely">Michèle Guely</name></author><author><name sortKey="Marchal, Philippe" sort="Marchal, Philippe" uniqKey="Marchal P" first="Philippe" last="Marchal">Philippe Marchal</name></author><author><name sortKey="Choplin, Lionel" sort="Choplin, Lionel" uniqKey="Choplin L" first="Lionel" last="Choplin">Lionel Choplin</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2004">2004</date><idno type="RBID">pubmed:14697688</idno><idno type="pmid">14697688</idno><idno type="wicri:Area/PubMed/Corpus">000197</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Corpus" wicri:corpus="PubMed">000197</idno><idno type="wicri:Area/PubMed/Curation">000197</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Curation">000197</idno><idno type="wicri:Area/PubMed/Checkpoint">000197</idno><idno type="wicri:explorRef" wicri:stream="Checkpoint" wicri:step="PubMed">000197</idno><idno type="wicri:Area/Ncbi/Merge">000052</idno><idno type="wicri:Area/Ncbi/Curation">000052</idno><idno type="wicri:Area/Ncbi/Checkpoint">000052</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Shear-induced phase transitions in sucrose ester surfactant.</title><author><name sortKey="Sadtler, Veronique M" sort="Sadtler, Veronique M" uniqKey="Sadtler V" first="Véronique M" last="Sadtler">Véronique M. Sadtler</name><affiliation wicri:level="3"><nlm:affiliation>Centre de Génie Chimique des Milieux Rhéologiquement Complexes, GEMICO-Groupe ENSIC, 1 rue Grandville, BP 451, F-54001 Cedex, Nancy, France. veronique.sadtler@ensic.inpl-nancy.fr</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>Centre de Génie Chimique des Milieux Rhéologiquement Complexes, GEMICO-Groupe ENSIC, 1 rue Grandville, BP 451, F-54001 Cedex, Nancy</wicri:regionArea><placeName><region type="region">Grand Est</region><region type="old region">Lorraine (région)</region><settlement type="city">Nancy</settlement></placeName></affiliation></author><author><name sortKey="Guely, Michele" sort="Guely, Michele" uniqKey="Guely M" first="Michèle" last="Guely">Michèle Guely</name></author><author><name sortKey="Marchal, Philippe" sort="Marchal, Philippe" uniqKey="Marchal P" first="Philippe" last="Marchal">Philippe Marchal</name></author><author><name sortKey="Choplin, Lionel" sort="Choplin, Lionel" uniqKey="Choplin L" first="Lionel" last="Choplin">Lionel Choplin</name></author></analytic><series><title level="j">Journal of colloid and interface science</title><idno type="ISSN">0021-9797</idno><imprint><date when="2004" type="published">2004</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The behavior of a commercial sucrose stearate blend has been examined by means of various experimental techniques (differential scanning calorimetry, light polarization and electron microscopy, and rotational rheometry). A partial phase diagram in water has been established. It shows that the binary system forms a lamellar lyotropic mesophase and that the melting behavior is characterized by a lamellar gel-lamellar liquid crystalline phase transition. The identification of the liquid crystalline phase has been carried out from textural observation using polarization microscopy and freeze-fracture electron microscopy. At low surfactant concentrations, the phase transition has been followed through rheological experiments. Furthermore, a shear-induced transition, from the lamellar phase (sheets of surfactant bilayers including a few large multilamellar vesicles) to an onion phase, has been observed above a critical temperature of 43 degrees C. The vesicles so obtained did not relax over more than 3 weeks. The presence of a small ratio of distearate in the sugar ester blend seems to be the key to vesicle formation at low surface-active material concentration.</div></front></TEI><affiliations><list><country><li>France</li></country><region><li>Grand Est</li><li>Lorraine (région)</li></region><settlement><li>Nancy</li></settlement></list><tree><noCountry><name sortKey="Choplin, Lionel" sort="Choplin, Lionel" uniqKey="Choplin L" first="Lionel" last="Choplin">Lionel Choplin</name><name sortKey="Guely, Michele" sort="Guely, Michele" uniqKey="Guely M" first="Michèle" last="Guely">Michèle Guely</name><name sortKey="Marchal, Philippe" sort="Marchal, Philippe" uniqKey="Marchal P" first="Philippe" last="Marchal">Philippe Marchal</name></noCountry><country name="France"><region name="Grand Est"><name sortKey="Sadtler, Veronique M" sort="Sadtler, Veronique M" uniqKey="Sadtler V" first="Véronique M" last="Sadtler">Véronique M. 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