Polar-molecules-driven enhanced colloidal electrostatic interactions and their applications in achieving high active electrorheological materials
We have fabricated a class of colloidal electrorheological (ER) fluids, in which suspended TiO2 particles were synthesized by a sol-gel method and modified by 1,4-butyrolactone molecules with a permanent molecular dipole moment of 4.524 D. Compared with pure TiO2 ER fluids, the quasi-static yield st...
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| Veröffentlicht in: | Journal of materials research 2008-02, Vol.23 (2), p.409-417 |
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| container_title | Journal of materials research |
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| creator | Xu, L. Tian, W.J. Wu, X.F. Cao, J.G. Zhou, L.W. Huang, J.P. Gu, G.Q. |
| description | We have fabricated a class of colloidal electrorheological (ER) fluids, in which suspended TiO2 particles were synthesized by a sol-gel method and modified by 1,4-butyrolactone molecules with a permanent molecular dipole moment of 4.524 D. Compared with pure TiO2 ER fluids, the quasi-static yield stress of the polar- molecules-modified ER fluid is enhanced as high as 48.1 kPa when subjected to an external electric field of 5 kV/mm. Also, it possesses other attractive characters such as low current density ( |
| doi_str_mv | 10.1557/JMR.2008.0057 |
| format | Article |
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Compared with pure TiO2 ER fluids, the quasi-static yield stress of the polar- molecules-modified ER fluid is enhanced as high as 48.1 kPa when subjected to an external electric field of 5 kV/mm. Also, it possesses other attractive characters such as low current density (<14 μA/cm2) and low sedimentation. Based on a Green’s function method, we present a first-principles approach to investigate colloidal electrostatic interactions. Excellent agreement between experiment and theory has been shown for the enhancement ratio of quasi-static yield stress, which quantitatively reveals that enough polar molecules oriented within the field-directed gap between the colloidal particles can unexpectedly enhance the interactions, thus yielding the unusual enhancement. This shows a promising and flexible direction for achieving more highly active ER materials.</description><identifier>ISSN: 0884-2914</identifier><identifier>EISSN: 2044-5326</identifier><identifier>DOI: 10.1557/JMR.2008.0057</identifier><language>eng</language><publisher>New York, USA: Cambridge University Press</publisher><subject>Applied and Technical Physics ; Biomaterials ; Colloid ; Dielectric ; Inorganic Chemistry ; Materials Engineering ; Materials Science ; Microstructure ; Nanotechnology</subject><ispartof>Journal of materials research, 2008-02, Vol.23 (2), p.409-417</ispartof><rights>Copyright © Materials Research Society 2007</rights><rights>The Materials Research Society 2008</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c422t-1ceb1c90923f6380e273d18205294092e64f5bbeaf24f6713ffa0d7a6bbd40a73</citedby><cites>FETCH-LOGICAL-c422t-1ceb1c90923f6380e273d18205294092e64f5bbeaf24f6713ffa0d7a6bbd40a73</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1557/JMR.2008.0057$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1557/JMR.2008.0057$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27901,27902,41464,42533,51294</link.rule.ids></links><search><creatorcontrib>Xu, L.</creatorcontrib><creatorcontrib>Tian, W.J.</creatorcontrib><creatorcontrib>Wu, X.F.</creatorcontrib><creatorcontrib>Cao, J.G.</creatorcontrib><creatorcontrib>Zhou, L.W.</creatorcontrib><creatorcontrib>Huang, J.P.</creatorcontrib><creatorcontrib>Gu, G.Q.</creatorcontrib><title>Polar-molecules-driven enhanced colloidal electrostatic interactions and their applications in achieving high active electrorheological materials</title><title>Journal of materials research</title><addtitle>Journal of Materials Research</addtitle><addtitle>J. Mater. Res</addtitle><description>We have fabricated a class of colloidal electrorheological (ER) fluids, in which suspended TiO2 particles were synthesized by a sol-gel method and modified by 1,4-butyrolactone molecules with a permanent molecular dipole moment of 4.524 D. Compared with pure TiO2 ER fluids, the quasi-static yield stress of the polar- molecules-modified ER fluid is enhanced as high as 48.1 kPa when subjected to an external electric field of 5 kV/mm. Also, it possesses other attractive characters such as low current density (<14 μA/cm2) and low sedimentation. Based on a Green’s function method, we present a first-principles approach to investigate colloidal electrostatic interactions. Excellent agreement between experiment and theory has been shown for the enhancement ratio of quasi-static yield stress, which quantitatively reveals that enough polar molecules oriented within the field-directed gap between the colloidal particles can unexpectedly enhance the interactions, thus yielding the unusual enhancement. This shows a promising and flexible direction for achieving more highly active ER materials.</description><subject>Applied and Technical Physics</subject><subject>Biomaterials</subject><subject>Colloid</subject><subject>Dielectric</subject><subject>Inorganic Chemistry</subject><subject>Materials Engineering</subject><subject>Materials Science</subject><subject>Microstructure</subject><subject>Nanotechnology</subject><issn>0884-2914</issn><issn>2044-5326</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2008</creationdate><recordtype>article</recordtype><recordid>eNqFkE9v1DAQxS0EEkvhyN0nbtnajvPviAoUUFdQVEDiYk2cSeLi2Fvbu2o_Bt8Yr3bhhjiNNPrNe_MeIS85W_Oqas4_br6sBWPtmrGqeURWgklZVKWoH5MVa1tZiI7Lp-RZjLeM8Yo1ckV-ffYWQrF4i3pnMRZDMHt0FN0MTuNAtbfWmwEsxYyk4GOCZDQ1LmEAnYx3kYIbaJrRBArbrTUajmvjKOjZ4N64ic5mmunhYI9_pMKM3vop85YukPUM2PicPBnzwBeneUa-vnt7c_G-uPp0-eHi9VWhpRCp4Bp7rjvWiXKsy5ahaMqBt4JVopN5i7Ucq75HGIUc64aX4whsaKDu-0EyaMoz8uqouw3-bocxqcVEjdaCQ7-LqhSsq1veZbA4gjqHjwFHtQ1mgfCgOFOH4lUuXh2KV4fiM78-8jFzbsKgbv0uuJzlnwcnAxMT3v9Vh_BT1U3ZVKq-vFbXP958a79vNuom8-enh2Dpgxkm_J_Db3gSp88</recordid><startdate>20080201</startdate><enddate>20080201</enddate><creator>Xu, L.</creator><creator>Tian, W.J.</creator><creator>Wu, X.F.</creator><creator>Cao, J.G.</creator><creator>Zhou, L.W.</creator><creator>Huang, J.P.</creator><creator>Gu, G.Q.</creator><general>Cambridge University Press</general><general>Springer International Publishing</general><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20080201</creationdate><title>Polar-molecules-driven enhanced colloidal electrostatic interactions and their applications in achieving high active electrorheological materials</title><author>Xu, L. ; Tian, W.J. ; Wu, X.F. ; Cao, J.G. ; Zhou, L.W. ; Huang, J.P. ; Gu, G.Q.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c422t-1ceb1c90923f6380e273d18205294092e64f5bbeaf24f6713ffa0d7a6bbd40a73</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2008</creationdate><topic>Applied and Technical Physics</topic><topic>Biomaterials</topic><topic>Colloid</topic><topic>Dielectric</topic><topic>Inorganic Chemistry</topic><topic>Materials Engineering</topic><topic>Materials Science</topic><topic>Microstructure</topic><topic>Nanotechnology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Xu, L.</creatorcontrib><creatorcontrib>Tian, W.J.</creatorcontrib><creatorcontrib>Wu, X.F.</creatorcontrib><creatorcontrib>Cao, J.G.</creatorcontrib><creatorcontrib>Zhou, L.W.</creatorcontrib><creatorcontrib>Huang, J.P.</creatorcontrib><creatorcontrib>Gu, G.Q.</creatorcontrib><collection>Istex</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Journal of materials research</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Xu, L.</au><au>Tian, W.J.</au><au>Wu, X.F.</au><au>Cao, J.G.</au><au>Zhou, L.W.</au><au>Huang, J.P.</au><au>Gu, G.Q.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Polar-molecules-driven enhanced colloidal electrostatic interactions and their applications in achieving high active electrorheological materials</atitle><jtitle>Journal of materials research</jtitle><stitle>Journal of Materials Research</stitle><addtitle>J. Mater. Res</addtitle><date>2008-02-01</date><risdate>2008</risdate><volume>23</volume><issue>2</issue><spage>409</spage><epage>417</epage><pages>409-417</pages><issn>0884-2914</issn><eissn>2044-5326</eissn><abstract>We have fabricated a class of colloidal electrorheological (ER) fluids, in which suspended TiO2 particles were synthesized by a sol-gel method and modified by 1,4-butyrolactone molecules with a permanent molecular dipole moment of 4.524 D. Compared with pure TiO2 ER fluids, the quasi-static yield stress of the polar- molecules-modified ER fluid is enhanced as high as 48.1 kPa when subjected to an external electric field of 5 kV/mm. Also, it possesses other attractive characters such as low current density (<14 μA/cm2) and low sedimentation. Based on a Green’s function method, we present a first-principles approach to investigate colloidal electrostatic interactions. Excellent agreement between experiment and theory has been shown for the enhancement ratio of quasi-static yield stress, which quantitatively reveals that enough polar molecules oriented within the field-directed gap between the colloidal particles can unexpectedly enhance the interactions, thus yielding the unusual enhancement. This shows a promising and flexible direction for achieving more highly active ER materials.</abstract><cop>New York, USA</cop><pub>Cambridge University Press</pub><doi>10.1557/JMR.2008.0057</doi><tpages>9</tpages></addata></record> |
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| subjects | Applied and Technical Physics Biomaterials Colloid Dielectric Inorganic Chemistry Materials Engineering Materials Science Microstructure Nanotechnology |
| title | Polar-molecules-driven enhanced colloidal electrostatic interactions and their applications in achieving high active electrorheological materials |
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