Preparation and characterization of kaolinite nanostructures; reaction pathways, morphology and structural order
Clay-based nanostructures were prepared from kaolinites of varying structural order by two different methods. In the first method the kaolinite-urea precursor, obtained by dry grinding, was intercalated further with triethanolamine and the tetraalkylammonium salt was synthesized in the interlamellar...
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| Veröffentlicht in: | Clay minerals 2015-08, Vol.50 (3), p.329-340 |
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| creator | Zsirka, Balazs Horvath, Erzsebet Mako, Eva Kurdi, Robert Kristof, Janos |
| description | Clay-based nanostructures were prepared from kaolinites of varying structural order by two different methods. In the first method the kaolinite-urea precursor, obtained by dry grinding, was intercalated further with triethanolamine and the tetraalkylammonium salt was synthesized in the interlamellar space. Exfoliation was achieved by the use of sodium polyacrylate (PAS). In the second method, the kaolinite-potassium acetate (kaolinite-KAc) precursor, obtained via two different methods, was intercalated further with ethylene glycol (EG) and then n-hexylamine (HA). Intercalation with EG was also achieved by heating either directly or with microwaves. The morphology that results depends on the method of precursor preparation, the method of heat treatment and the degree of structural order of the original clay. Higher structural order facilitates the formation of a tubular morphology, while mechanical treatment and microwave agitation may result in broken tubes. Molecular mechanical (MM) calculations showed that organo-complexes may be exfoliated to a d value of 10-11 Å. |
| doi_str_mv | 10.1180/claymin.2015.050.3.06 |
| format | Article |
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In the first method the kaolinite-urea precursor, obtained by dry grinding, was intercalated further with triethanolamine and the tetraalkylammonium salt was synthesized in the interlamellar space. Exfoliation was achieved by the use of sodium polyacrylate (PAS). In the second method, the kaolinite-potassium acetate (kaolinite-KAc) precursor, obtained via two different methods, was intercalated further with ethylene glycol (EG) and then n-hexylamine (HA). Intercalation with EG was also achieved by heating either directly or with microwaves. The morphology that results depends on the method of precursor preparation, the method of heat treatment and the degree of structural order of the original clay. Higher structural order facilitates the formation of a tubular morphology, while mechanical treatment and microwave agitation may result in broken tubes. Molecular mechanical (MM) calculations showed that organo-complexes may be exfoliated to a d value of 10-11 Å.</description><identifier>ISSN: 0009-8558</identifier><identifier>EISSN: 1471-8030</identifier><identifier>DOI: 10.1180/claymin.2015.050.3.06</identifier><language>eng</language><publisher>Mineralogical Society</publisher><subject>Acetates ; chemical properties ; chemical reactions ; clay mineralogy ; clay minerals ; crystal structure ; Exfoliation ; experimental studies ; geochemistry ; Heat treatment ; intercalation ; Kaolinite ; kaolinite nanostructure ; Microwaves ; molecular dynamics ; molecular mechanical calculation ; Morphology ; nanoparticles ; Nanostructure ; Precursors ; sample preparation ; sed rocks, sediments ; Sedimentary petrology ; sheet silicates ; silicates</subject><ispartof>Clay minerals, 2015-08, Vol.50 (3), p.329-340</ispartof><rights>GeoRef, Copyright 2020, American Geosciences Institute. 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In the first method the kaolinite-urea precursor, obtained by dry grinding, was intercalated further with triethanolamine and the tetraalkylammonium salt was synthesized in the interlamellar space. Exfoliation was achieved by the use of sodium polyacrylate (PAS). In the second method, the kaolinite-potassium acetate (kaolinite-KAc) precursor, obtained via two different methods, was intercalated further with ethylene glycol (EG) and then n-hexylamine (HA). Intercalation with EG was also achieved by heating either directly or with microwaves. The morphology that results depends on the method of precursor preparation, the method of heat treatment and the degree of structural order of the original clay. Higher structural order facilitates the formation of a tubular morphology, while mechanical treatment and microwave agitation may result in broken tubes. Molecular mechanical (MM) calculations showed that organo-complexes may be exfoliated to a d value of 10-11 Å.</description><subject>Acetates</subject><subject>chemical properties</subject><subject>chemical reactions</subject><subject>clay mineralogy</subject><subject>clay minerals</subject><subject>crystal structure</subject><subject>Exfoliation</subject><subject>experimental studies</subject><subject>geochemistry</subject><subject>Heat treatment</subject><subject>intercalation</subject><subject>Kaolinite</subject><subject>kaolinite nanostructure</subject><subject>Microwaves</subject><subject>molecular dynamics</subject><subject>molecular mechanical calculation</subject><subject>Morphology</subject><subject>nanoparticles</subject><subject>Nanostructure</subject><subject>Precursors</subject><subject>sample preparation</subject><subject>sed rocks, sediments</subject><subject>Sedimentary petrology</subject><subject>sheet silicates</subject><subject>silicates</subject><issn>0009-8558</issn><issn>1471-8030</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNqFkV-L1DAUxYu44LjrRxD6KGjrTZO0KT7J4D9YcB_0OdymtzNdM0lNWobupzdjV3zTp-SGc343nJNlLxmUjCl4ayyup9GVFTBZgoSSl1A_yXZMNKxQwOFptgOAtlBSqmfZ8xjv08iF4rtsugs0YcB59C5H1-fmmCYzUxgftkc_5D_Q29GNM-UOnY9zWMy8BIrv8kBJe1FNOB_PuMY3-cmH6eitP6y_eX_UaHMfego32dWANtKLx_M6-_7xw7f95-L266cv-_e3BQol54KUVIJAkmoY64DSZ-uuaQB7YDiYCppBoDRCth3nhnUVqk6JvpINpUxI8Ovs1cadgv-5UJz1aYyGrEVHfok6Bad401a1_L-0aXkl0soLVW5SE3yMgQY9hfGEYdUM9KUM_ViGvpShUxmaa6iTb7_5zmhTtj0dwrKmi773S3Aph3_7JXBetYnyeqMcyEczkjN09sH2fynJVWtgLSjJfwE2Habq</recordid><startdate>20150801</startdate><enddate>20150801</enddate><creator>Zsirka, Balazs</creator><creator>Horvath, Erzsebet</creator><creator>Mako, Eva</creator><creator>Kurdi, Robert</creator><creator>Kristof, Janos</creator><general>Mineralogical Society</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7QQ</scope><scope>7SR</scope><scope>8FD</scope><scope>JG9</scope><scope>7UA</scope><scope>C1K</scope><scope>F1W</scope><scope>H96</scope><scope>L.G</scope></search><sort><creationdate>20150801</creationdate><title>Preparation and characterization of kaolinite nanostructures; 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In the first method the kaolinite-urea precursor, obtained by dry grinding, was intercalated further with triethanolamine and the tetraalkylammonium salt was synthesized in the interlamellar space. Exfoliation was achieved by the use of sodium polyacrylate (PAS). In the second method, the kaolinite-potassium acetate (kaolinite-KAc) precursor, obtained via two different methods, was intercalated further with ethylene glycol (EG) and then n-hexylamine (HA). Intercalation with EG was also achieved by heating either directly or with microwaves. The morphology that results depends on the method of precursor preparation, the method of heat treatment and the degree of structural order of the original clay. Higher structural order facilitates the formation of a tubular morphology, while mechanical treatment and microwave agitation may result in broken tubes. Molecular mechanical (MM) calculations showed that organo-complexes may be exfoliated to a d value of 10-11 Å.</abstract><pub>Mineralogical Society</pub><doi>10.1180/claymin.2015.050.3.06</doi><tpages>12</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Clay minerals, 2015-08, Vol.50 (3), p.329-340 |
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| language | eng |
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| source | Cambridge University Press journals |
| subjects | Acetates chemical properties chemical reactions clay mineralogy clay minerals crystal structure Exfoliation experimental studies geochemistry Heat treatment intercalation Kaolinite kaolinite nanostructure Microwaves molecular dynamics molecular mechanical calculation Morphology nanoparticles Nanostructure Precursors sample preparation sed rocks, sediments Sedimentary petrology sheet silicates silicates |
| title | Preparation and characterization of kaolinite nanostructures; reaction pathways, morphology and structural order |
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