Fumed Silicas Possessing Different Morphology and Hydrophilicity
Fumed silicas synthesized under varied conditions (stoichiometric or nonstoichiometric amounts of reactants SiCl4, O2 (mixed with N2), and H2, different burner diameter, flow velocity and turbulence, flame temperature, etc.) were studied using adsorption of nitrogen, argon, and water, infrared (IR)...
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| Veröffentlicht in: | Journal of colloid and interface science 2001-10, Vol.242 (1), p.90-103 |
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| creator | Gun'ko, V.M. Mironyuk, I.F. Zarko, V.I. Turov, V.V. Voronin, E.F. Pakhlov, E.M. Goncharuk, E.V. Leboda, R. Skubiszewska-Ziȩba, J. Janusz, W. Chibowski, S. Levchuk, Yu.N. Klyueva, A.V. |
| description | Fumed silicas synthesized under varied conditions (stoichiometric or nonstoichiometric amounts of reactants SiCl4, O2 (mixed with N2), and H2, different burner diameter, flow velocity and turbulence, flame temperature, etc.) were studied using adsorption of nitrogen, argon, and water, infrared (IR) and photon correlation spectroscopy, 1H NMR, and electrokinetic methods. Prepared silicas posses different specific surface area (SAr=85–512 m2/g), structures of primary particles and their swarms, concentrations of silanols (COH=1.9–5.2 μmol/m2), and weakly (Cw,105=0.4–2.4 wt%) and strongly (Cw,900=0.4–2.2 wt%) bound waters. There is correlation between the specific surface area (S) of fumed silica and the flow velocity vf(S∼ln vf at vf |
| doi_str_mv | 10.1006/jcis.2001.7736 |
| format | Article |
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Prepared silicas posses different specific surface area (SAr=85–512 m2/g), structures of primary particles and their swarms, concentrations of silanols (COH=1.9–5.2 μmol/m2), and weakly (Cw,105=0.4–2.4 wt%) and strongly (Cw,900=0.4–2.2 wt%) bound waters. There is correlation between the specific surface area (S) of fumed silica and the flow velocity vf(S∼ln vf at vf<25–30 m/s). A decrease in the amounts of hydrogen/oxygen in the flame and elevating synthesis temperature or flame turbulence (due to an increase in the burner diameter or changes in the reactant amounts) enhances the size of primary particles, which become slightly micropous on addition of hydrogen (though an annular nozzle) reacting at the flame periphery. Dividing of the flow in the burner to several smaller flows reducing the turbulence without changes in other synthesis conditions significantly enhances the specific surface area. The concentration of silanols increases with growing primary particle size, and the hydrophilicity (Cw,105+Cw,900) decreases at oxygen deficiency on the synthesis.</description><identifier>ISSN: 0021-9797</identifier><identifier>EISSN: 1095-7103</identifier><identifier>DOI: 10.1006/jcis.2001.7736</identifier><identifier>CODEN: JCISA5</identifier><language>eng</language><publisher>San Diego, CA: Elsevier Inc</publisher><subject>1H NMR ; aqueous suspension ; Chemistry ; electrophoretic mobility ; Elements and non-metal compounds (oxides, hydroxides, hydrides, sulfides, carbides, ...) ; Exact sciences and technology ; fumed silica ; Inorganic chemistry and origins of life ; particle morphology ; particle size distribution ; photon correlation spectroscopy ; Preparations and properties ; synthesis condition impact ; water adsorption</subject><ispartof>Journal of colloid and interface science, 2001-10, Vol.242 (1), p.90-103</ispartof><rights>2001 Academic Press</rights><rights>2002 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c353t-87ed2b960597d0292e78e41d250cd10c7990dd30f7788b3afa2b6e5f6f1fdc1d3</citedby><cites>FETCH-LOGICAL-c353t-87ed2b960597d0292e78e41d250cd10c7990dd30f7788b3afa2b6e5f6f1fdc1d3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0021979701977367$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=14069769$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Gun'ko, V.M.</creatorcontrib><creatorcontrib>Mironyuk, I.F.</creatorcontrib><creatorcontrib>Zarko, V.I.</creatorcontrib><creatorcontrib>Turov, V.V.</creatorcontrib><creatorcontrib>Voronin, E.F.</creatorcontrib><creatorcontrib>Pakhlov, E.M.</creatorcontrib><creatorcontrib>Goncharuk, E.V.</creatorcontrib><creatorcontrib>Leboda, R.</creatorcontrib><creatorcontrib>Skubiszewska-Ziȩba, J.</creatorcontrib><creatorcontrib>Janusz, W.</creatorcontrib><creatorcontrib>Chibowski, S.</creatorcontrib><creatorcontrib>Levchuk, Yu.N.</creatorcontrib><creatorcontrib>Klyueva, A.V.</creatorcontrib><title>Fumed Silicas Possessing Different Morphology and Hydrophilicity</title><title>Journal of colloid and interface science</title><description>Fumed silicas synthesized under varied conditions (stoichiometric or nonstoichiometric amounts of reactants SiCl4, O2 (mixed with N2), and H2, different burner diameter, flow velocity and turbulence, flame temperature, etc.) were studied using adsorption of nitrogen, argon, and water, infrared (IR) and photon correlation spectroscopy, 1H NMR, and electrokinetic methods. Prepared silicas posses different specific surface area (SAr=85–512 m2/g), structures of primary particles and their swarms, concentrations of silanols (COH=1.9–5.2 μmol/m2), and weakly (Cw,105=0.4–2.4 wt%) and strongly (Cw,900=0.4–2.2 wt%) bound waters. There is correlation between the specific surface area (S) of fumed silica and the flow velocity vf(S∼ln vf at vf<25–30 m/s). A decrease in the amounts of hydrogen/oxygen in the flame and elevating synthesis temperature or flame turbulence (due to an increase in the burner diameter or changes in the reactant amounts) enhances the size of primary particles, which become slightly micropous on addition of hydrogen (though an annular nozzle) reacting at the flame periphery. Dividing of the flow in the burner to several smaller flows reducing the turbulence without changes in other synthesis conditions significantly enhances the specific surface area. The concentration of silanols increases with growing primary particle size, and the hydrophilicity (Cw,105+Cw,900) decreases at oxygen deficiency on the synthesis.</description><subject>1H NMR</subject><subject>aqueous suspension</subject><subject>Chemistry</subject><subject>electrophoretic mobility</subject><subject>Elements and non-metal compounds (oxides, hydroxides, hydrides, sulfides, carbides, ...)</subject><subject>Exact sciences and technology</subject><subject>fumed silica</subject><subject>Inorganic chemistry and origins of life</subject><subject>particle morphology</subject><subject>particle size distribution</subject><subject>photon correlation spectroscopy</subject><subject>Preparations and properties</subject><subject>synthesis condition impact</subject><subject>water adsorption</subject><issn>0021-9797</issn><issn>1095-7103</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2001</creationdate><recordtype>article</recordtype><recordid>eNp1j7FOwzAQQC0EEqWwMmdhTDjHdRxvoEIpUhFIwGw59rl1lSaRHZDy9yQqYmO65b27e4RcU8goQHG7Nz5mOQDNhGDFCZlRkDwVFNgpmQHkNJVCinNyEeN-pCjnckbuVl8HtMm7r73RMXlrY8QYfbNNHrxzGLDpk5c2dLu2brdDohubrAcb2m43Gb4fLsmZ03XEq985J5-rx4_lOt28Pj0v7zepYZz1aSnQ5pUsgEthIZc5ihIX1OYcjKVghJRgLQMnRFlWTDudVwVyVzjqrKGWzUl23GvC-GNAp7rgDzoMioKa-tXUr6Z-NfWPws1R6HQ0unZBNxPwZy2gkKKQI1ceORy___YYVDQeG4PWBzS9sq3_78QPsHJvMQ</recordid><startdate>20011001</startdate><enddate>20011001</enddate><creator>Gun'ko, V.M.</creator><creator>Mironyuk, I.F.</creator><creator>Zarko, V.I.</creator><creator>Turov, V.V.</creator><creator>Voronin, E.F.</creator><creator>Pakhlov, E.M.</creator><creator>Goncharuk, E.V.</creator><creator>Leboda, R.</creator><creator>Skubiszewska-Ziȩba, J.</creator><creator>Janusz, W.</creator><creator>Chibowski, S.</creator><creator>Levchuk, Yu.N.</creator><creator>Klyueva, A.V.</creator><general>Elsevier Inc</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>20011001</creationdate><title>Fumed Silicas Possessing Different Morphology and Hydrophilicity</title><author>Gun'ko, V.M. ; Mironyuk, I.F. ; Zarko, V.I. ; Turov, V.V. ; Voronin, E.F. ; Pakhlov, E.M. ; Goncharuk, E.V. ; Leboda, R. ; Skubiszewska-Ziȩba, J. ; Janusz, W. ; Chibowski, S. ; Levchuk, Yu.N. ; Klyueva, A.V.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c353t-87ed2b960597d0292e78e41d250cd10c7990dd30f7788b3afa2b6e5f6f1fdc1d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2001</creationdate><topic>1H NMR</topic><topic>aqueous suspension</topic><topic>Chemistry</topic><topic>electrophoretic mobility</topic><topic>Elements and non-metal compounds (oxides, hydroxides, hydrides, sulfides, carbides, ...)</topic><topic>Exact sciences and technology</topic><topic>fumed silica</topic><topic>Inorganic chemistry and origins of life</topic><topic>particle morphology</topic><topic>particle size distribution</topic><topic>photon correlation spectroscopy</topic><topic>Preparations and properties</topic><topic>synthesis condition impact</topic><topic>water adsorption</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Gun'ko, V.M.</creatorcontrib><creatorcontrib>Mironyuk, I.F.</creatorcontrib><creatorcontrib>Zarko, V.I.</creatorcontrib><creatorcontrib>Turov, V.V.</creatorcontrib><creatorcontrib>Voronin, E.F.</creatorcontrib><creatorcontrib>Pakhlov, E.M.</creatorcontrib><creatorcontrib>Goncharuk, E.V.</creatorcontrib><creatorcontrib>Leboda, R.</creatorcontrib><creatorcontrib>Skubiszewska-Ziȩba, J.</creatorcontrib><creatorcontrib>Janusz, W.</creatorcontrib><creatorcontrib>Chibowski, S.</creatorcontrib><creatorcontrib>Levchuk, Yu.N.</creatorcontrib><creatorcontrib>Klyueva, A.V.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><jtitle>Journal of colloid and interface science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Gun'ko, V.M.</au><au>Mironyuk, I.F.</au><au>Zarko, V.I.</au><au>Turov, V.V.</au><au>Voronin, E.F.</au><au>Pakhlov, E.M.</au><au>Goncharuk, E.V.</au><au>Leboda, R.</au><au>Skubiszewska-Ziȩba, J.</au><au>Janusz, W.</au><au>Chibowski, S.</au><au>Levchuk, Yu.N.</au><au>Klyueva, A.V.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Fumed Silicas Possessing Different Morphology and Hydrophilicity</atitle><jtitle>Journal of colloid and interface science</jtitle><date>2001-10-01</date><risdate>2001</risdate><volume>242</volume><issue>1</issue><spage>90</spage><epage>103</epage><pages>90-103</pages><issn>0021-9797</issn><eissn>1095-7103</eissn><coden>JCISA5</coden><abstract>Fumed silicas synthesized under varied conditions (stoichiometric or nonstoichiometric amounts of reactants SiCl4, O2 (mixed with N2), and H2, different burner diameter, flow velocity and turbulence, flame temperature, etc.) were studied using adsorption of nitrogen, argon, and water, infrared (IR) and photon correlation spectroscopy, 1H NMR, and electrokinetic methods. Prepared silicas posses different specific surface area (SAr=85–512 m2/g), structures of primary particles and their swarms, concentrations of silanols (COH=1.9–5.2 μmol/m2), and weakly (Cw,105=0.4–2.4 wt%) and strongly (Cw,900=0.4–2.2 wt%) bound waters. There is correlation between the specific surface area (S) of fumed silica and the flow velocity vf(S∼ln vf at vf<25–30 m/s). A decrease in the amounts of hydrogen/oxygen in the flame and elevating synthesis temperature or flame turbulence (due to an increase in the burner diameter or changes in the reactant amounts) enhances the size of primary particles, which become slightly micropous on addition of hydrogen (though an annular nozzle) reacting at the flame periphery. Dividing of the flow in the burner to several smaller flows reducing the turbulence without changes in other synthesis conditions significantly enhances the specific surface area. The concentration of silanols increases with growing primary particle size, and the hydrophilicity (Cw,105+Cw,900) decreases at oxygen deficiency on the synthesis.</abstract><cop>San Diego, CA</cop><pub>Elsevier Inc</pub><doi>10.1006/jcis.2001.7736</doi><tpages>14</tpages></addata></record> |
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| subjects | 1H NMR aqueous suspension Chemistry electrophoretic mobility Elements and non-metal compounds (oxides, hydroxides, hydrides, sulfides, carbides, ...) Exact sciences and technology fumed silica Inorganic chemistry and origins of life particle morphology particle size distribution photon correlation spectroscopy Preparations and properties synthesis condition impact water adsorption |
| title | Fumed Silicas Possessing Different Morphology and Hydrophilicity |
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