Polar‐Molecule‐Dominated Electrorheological Fluids Featuring High Yield Stresses
Identifieur interne : 001E12 ( Istex/Curation ); précédent : 001E11; suivant : 001E13Polar‐Molecule‐Dominated Electrorheological Fluids Featuring High Yield Stresses
Auteurs : Rong Shen ; Xuezhao Wang ; Yang Lu ; De Wang ; Gang Sun ; Zexian Cao ; Kunquan LuSource :
- Advanced Materials [ 0935-9648 ] ; 2009-12-04.
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Abstract
Recent works on the development of various electrorheological (ER) fluids composed of TiO2, SrTiO, and CaTiO particles coated with CO/HO polar groups are summarized, in which an extremely large yield stress up to 200 kPa is measured and the dynamical yield stress reaches 117 kPa at a shear rate of 775 s−1. Moreover, unlike that of traditional dielectric ER fluids, the yield stress displays a linear dependence on electric field strength. Experimental results reveal that it is the polar molecules adsorbed onto the dielectric particles that play the decisive role: the polar‐molecule‐dominated ER effect arises from the alignment of polar molecules by the enhanced local electric field in the gap between neighboring particles. The pretreatment of electrodes and the contrivance of new measuring procedures, which are desirable for the characterization and practical implementation of this material, are also discussed. The successful synthesis of these fluids has made many of the long since conceived applications of the ER effect available.
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DOI: 10.1002/adma.200901062
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Rong Shen<affiliation><mods:affiliation>Beijing National Laboratory for Condensed Matter Physics, Institute of Physics Chinese Academy of Sciences, Beijing 100190 (P. R. China)</mods:affiliation><wicri:noCountry code="subField">Beijing 100190 (P. R. China)</wicri:noCountry></affiliation><affiliation><mods:affiliation>Beijing National Laboratory for Condensed Matter Physics, Institute of Physics Chinese Academy of Sciences, Beijing 100190 (P. R. China)</mods:affiliation><wicri:noCountry code="subField">Beijing 100190 (P. R. China)</wicri:noCountry></affiliation><affiliation><mods:affiliation>Beijing National Laboratory for Condensed Matter Physics, Institute of Physics Chinese Academy of Sciences, Beijing 100190 (P. R. China)</mods:affiliation><wicri:noCountry code="subField">Beijing 100190 (P. R. China)</wicri:noCountry></affiliation><affiliation><mods:affiliation>Beijing National Laboratory for Condensed Matter Physics, Institute of Physics Chinese Academy of Sciences, Beijing 100190 (P. R. China)</mods:affiliation><wicri:noCountry code="subField">Beijing 100190 (P. R. China)</wicri:noCountry></affiliation><affiliation><mods:affiliation>Beijing National Laboratory for Condensed Matter Physics, Institute of Physics Chinese Academy of Sciences, Beijing 100190 (P. R. China)</mods:affiliation><wicri:noCountry code="subField">Beijing 100190 (P. R. China)</wicri:noCountry></affiliation><affiliation><mods:affiliation>Beijing National Laboratory for Condensed Matter Physics, Institute of Physics Chinese Academy of Sciences, Beijing 100190 (P. R. China)</mods:affiliation><wicri:noCountry code="subField">Beijing 100190 (P. R. China)</wicri:noCountry></affiliation><affiliation><mods:affiliation>Beijing National Laboratory for Condensed Matter Physics, Institute of Physics Chinese Academy of Sciences, Beijing 100190 (P. R. China)</mods:affiliation><wicri:noCountry code="subField">Beijing 100190 (P. R. China)</wicri:noCountry></affiliation>Le document en format XML
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China)</wicri:noCountry></affiliation></author><author><name sortKey="Wang, De" sort="Wang, De" uniqKey="Wang D" first="De" last="Wang">De Wang</name><affiliation><mods:affiliation>Beijing National Laboratory for Condensed Matter Physics, Institute of Physics Chinese Academy of Sciences, Beijing 100190 (P. R. China)</mods:affiliation><wicri:noCountry code="subField">Beijing 100190 (P. R. China)</wicri:noCountry></affiliation></author><author><name sortKey="Sun, Gang" sort="Sun, Gang" uniqKey="Sun G" first="Gang" last="Sun">Gang Sun</name><affiliation><mods:affiliation>Beijing National Laboratory for Condensed Matter Physics, Institute of Physics Chinese Academy of Sciences, Beijing 100190 (P. R. China)</mods:affiliation><wicri:noCountry code="subField">Beijing 100190 (P. R. China)</wicri:noCountry></affiliation></author><author><name sortKey="Cao, Zexian" sort="Cao, Zexian" uniqKey="Cao Z" first="Zexian" last="Cao">Zexian Cao</name><affiliation><mods:affiliation>Beijing National Laboratory for Condensed Matter Physics, Institute of Physics Chinese Academy of Sciences, Beijing 100190 (P. R. China)</mods:affiliation><wicri:noCountry code="subField">Beijing 100190 (P. R. China)</wicri:noCountry></affiliation></author><author><name sortKey="Lu, Kunquan" sort="Lu, Kunquan" uniqKey="Lu K" first="Kunquan" last="Lu">Kunquan Lu</name><affiliation><mods:affiliation>Beijing National Laboratory for Condensed Matter Physics, Institute of Physics Chinese Academy of Sciences, Beijing 100190 (P. R. China)</mods:affiliation><wicri:noCountry code="subField">Beijing 100190 (P. R. China)</wicri:noCountry></affiliation></author></analytic><monogr></monogr><series><title level="j">Advanced Materials</title><title level="j" type="abbrev">Adv. Mater.</title><idno type="ISSN">0935-9648</idno><idno type="eISSN">1521-4095</idno><imprint><publisher>WILEY‐VCH Verlag</publisher><pubPlace>Weinheim</pubPlace><date type="published" when="2009-12-04">2009-12-04</date><biblScope unit="volume">21</biblScope><biblScope unit="issue">45</biblScope><biblScope unit="page" from="4631">4631</biblScope><biblScope unit="page" to="4635">4635</biblScope></imprint><idno type="ISSN">0935-9648</idno></series><idno type="istex">5B22AC22C6D9DDC3E4B7AD5A47484998A166F356</idno><idno type="DOI">10.1002/adma.200901062</idno><idno type="ArticleID">ADMA200901062</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0935-9648</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>electrorheological fluids</term><term>polar molecules</term><term>shear rates</term><term>shear stresses</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Recent works on the development of various electrorheological (ER) fluids composed of TiO2, SrTiO, and CaTiO particles coated with CO/HO polar groups are summarized, in which an extremely large yield stress up to 200 kPa is measured and the dynamical yield stress reaches 117 kPa at a shear rate of 775 s−1. Moreover, unlike that of traditional dielectric ER fluids, the yield stress displays a linear dependence on electric field strength. Experimental results reveal that it is the polar molecules adsorbed onto the dielectric particles that play the decisive role: the polar‐molecule‐dominated ER effect arises from the alignment of polar molecules by the enhanced local electric field in the gap between neighboring particles. The pretreatment of electrodes and the contrivance of new measuring procedures, which are desirable for the characterization and practical implementation of this material, are also discussed. The successful synthesis of these fluids has made many of the long since conceived applications of the ER effect available.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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