Reduction in the processing time of doped sodium silicate based ambient pressure dried aerogels using shaker
The experimental results on the “reduction in the processing time of doped sodium silicate based ambient pressure dried aerogels using shaker”, are reported. Shaking the hydrogels in the shaker in presence of distilled water helps in the removal of sodium salt and reduces the processing time of the...
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| Veröffentlicht in: | Microporous and mesoporous materials 2010-10, Vol.134 (1), p.93-99 |
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| creator | Rao, A. Venkateswara Bangi, Uzma K.H. Kavale, Mahendra S. Imai, Hiroaki Hirashima, H. |
| description | The experimental results on the “reduction in the processing time of doped sodium silicate based ambient pressure dried aerogels using shaker”, are reported. Shaking the hydrogels in the shaker in presence of distilled water helps in the removal of sodium salt and reduces the processing time of the aerogels. In addition, doping the gels enormously helps in the improvement of strength and thermal insulation property of the aerogels. Hence, the present paper deals with the study of the effects of shaking speed and shaking period of the granular gels, and doping the gels with titanium dioxide powder (TiO
2) on the physical properties of the aerogels. The aerogels have been characterized by bulk density, volume shrinkage (%), porosity (%) and thermal conductivity. The quantitative analysis of hydrophobicity was done by measuring the contact angle of water on the surface of aerogel. The microstructural and elemental analyses studies were carried out using transmission electron microscopy (TEM), energy dispersive analysis by X-ray (EDAX) and fourier transform infrared (FTIR) spectroscopy. The pore volume and surface area of the aerogels were measured using N
2 adsorption–desorption BET surface analyzer. The thermal stability of the aerogels was checked by thermogravimetric and differential thermal analyses (TGA–DTA). Silica aerogels with low density ∼0.047
g/cc and low thermal conductivity ∼0.057
W/m
K have been obtained by shaking the gels at the speed of 150
RPM for 4
h using the molar ratio of Na
2SiO
3:H
2O:TiO
2:Citric acid:TMCS at 1:146.67:6
×
10
−5:0.54:9.46, respectively. The shaking of the wet gels in a shaker reduces the processing time of the aerogels from 4 to 2
days. These aerogels can be used as thermal insulating materials in ovens, refrigerators and related systems. |
| doi_str_mv | 10.1016/j.micromeso.2010.05.013 |
| format | Article |
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2) on the physical properties of the aerogels. The aerogels have been characterized by bulk density, volume shrinkage (%), porosity (%) and thermal conductivity. The quantitative analysis of hydrophobicity was done by measuring the contact angle of water on the surface of aerogel. The microstructural and elemental analyses studies were carried out using transmission electron microscopy (TEM), energy dispersive analysis by X-ray (EDAX) and fourier transform infrared (FTIR) spectroscopy. The pore volume and surface area of the aerogels were measured using N
2 adsorption–desorption BET surface analyzer. The thermal stability of the aerogels was checked by thermogravimetric and differential thermal analyses (TGA–DTA). Silica aerogels with low density ∼0.047
g/cc and low thermal conductivity ∼0.057
W/m
K have been obtained by shaking the gels at the speed of 150
RPM for 4
h using the molar ratio of Na
2SiO
3:H
2O:TiO
2:Citric acid:TMCS at 1:146.67:6
×
10
−5:0.54:9.46, respectively. The shaking of the wet gels in a shaker reduces the processing time of the aerogels from 4 to 2
days. These aerogels can be used as thermal insulating materials in ovens, refrigerators and related systems.</description><identifier>ISSN: 1387-1811</identifier><identifier>EISSN: 1873-3093</identifier><identifier>DOI: 10.1016/j.micromeso.2010.05.013</identifier><language>eng</language><publisher>San Diego, CA: Elsevier Inc</publisher><subject>Aerogels ; Ambient pressure drying ; Chemistry ; Colloidal gels. Colloidal sols ; Colloidal state and disperse state ; Density ; Doping ; Exact sciences and technology ; Gels ; General and physical chemistry ; Porous materials ; Reduction ; Shakers ; Shaking ; Sodium silicates ; Solid-liquid interface ; Surface physical chemistry ; Thermal insulating material ; Titanium dioxide</subject><ispartof>Microporous and mesoporous materials, 2010-10, Vol.134 (1), p.93-99</ispartof><rights>2010 Elsevier Inc.</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c378t-d129800c1688375a2b1c1c3c06be76aa1779feefba147a54d75a7e209a8d7b653</citedby><cites>FETCH-LOGICAL-c378t-d129800c1688375a2b1c1c3c06be76aa1779feefba147a54d75a7e209a8d7b653</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.micromeso.2010.05.013$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=23041536$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Rao, A. Venkateswara</creatorcontrib><creatorcontrib>Bangi, Uzma K.H.</creatorcontrib><creatorcontrib>Kavale, Mahendra S.</creatorcontrib><creatorcontrib>Imai, Hiroaki</creatorcontrib><creatorcontrib>Hirashima, H.</creatorcontrib><title>Reduction in the processing time of doped sodium silicate based ambient pressure dried aerogels using shaker</title><title>Microporous and mesoporous materials</title><description>The experimental results on the “reduction in the processing time of doped sodium silicate based ambient pressure dried aerogels using shaker”, are reported. Shaking the hydrogels in the shaker in presence of distilled water helps in the removal of sodium salt and reduces the processing time of the aerogels. In addition, doping the gels enormously helps in the improvement of strength and thermal insulation property of the aerogels. Hence, the present paper deals with the study of the effects of shaking speed and shaking period of the granular gels, and doping the gels with titanium dioxide powder (TiO
2) on the physical properties of the aerogels. The aerogels have been characterized by bulk density, volume shrinkage (%), porosity (%) and thermal conductivity. The quantitative analysis of hydrophobicity was done by measuring the contact angle of water on the surface of aerogel. The microstructural and elemental analyses studies were carried out using transmission electron microscopy (TEM), energy dispersive analysis by X-ray (EDAX) and fourier transform infrared (FTIR) spectroscopy. The pore volume and surface area of the aerogels were measured using N
2 adsorption–desorption BET surface analyzer. The thermal stability of the aerogels was checked by thermogravimetric and differential thermal analyses (TGA–DTA). Silica aerogels with low density ∼0.047
g/cc and low thermal conductivity ∼0.057
W/m
K have been obtained by shaking the gels at the speed of 150
RPM for 4
h using the molar ratio of Na
2SiO
3:H
2O:TiO
2:Citric acid:TMCS at 1:146.67:6
×
10
−5:0.54:9.46, respectively. The shaking of the wet gels in a shaker reduces the processing time of the aerogels from 4 to 2
days. These aerogels can be used as thermal insulating materials in ovens, refrigerators and related systems.</description><subject>Aerogels</subject><subject>Ambient pressure drying</subject><subject>Chemistry</subject><subject>Colloidal gels. Colloidal sols</subject><subject>Colloidal state and disperse state</subject><subject>Density</subject><subject>Doping</subject><subject>Exact sciences and technology</subject><subject>Gels</subject><subject>General and physical chemistry</subject><subject>Porous materials</subject><subject>Reduction</subject><subject>Shakers</subject><subject>Shaking</subject><subject>Sodium silicates</subject><subject>Solid-liquid interface</subject><subject>Surface physical chemistry</subject><subject>Thermal insulating material</subject><subject>Titanium dioxide</subject><issn>1387-1811</issn><issn>1873-3093</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><recordid>eNqFkE9LAzEQxRdRsFY_g7kIXrZmNt1NeizFfyAIoueQTWbb1N1NzewKfntTK149zfB47w3zy7JL4DPgUN1sZ523MXRIYVbwpPJyxkEcZRNQUuSCL8Rx2oWSOSiA0-yMaMs5SChgkrUv6EY7-NAz37Nhg2wXg0Ui36_Z4DtkoWEu7NAxCs6PHSPfemsGZLWhpJqu9tgPKZZCY0Tmot_LGMMaW2LjTxNtzDvG8-ykMS3hxe-cZm93t6-rh_zp-f5xtXzKrZBqyB0UC8W5hUopIUtT1GDBCsurGmVlDEi5aBCb2sBcmnLukkdiwRdGOVlXpZhm14fe9MvHiDTozpPFtjU9hpE0FFUl54LPVbLKgzUhJIrY6F30nYlfGrje89Vb_cdX7_lqXurENyWvfo8YsqZtoumtp794keqhFFXyLQ--RAM_PUZNNhGz6HxEO2gX_L-3vgFkd5b-</recordid><startdate>20101001</startdate><enddate>20101001</enddate><creator>Rao, A. Venkateswara</creator><creator>Bangi, Uzma K.H.</creator><creator>Kavale, Mahendra S.</creator><creator>Imai, Hiroaki</creator><creator>Hirashima, H.</creator><general>Elsevier Inc</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QQ</scope><scope>7SR</scope><scope>7U5</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20101001</creationdate><title>Reduction in the processing time of doped sodium silicate based ambient pressure dried aerogels using shaker</title><author>Rao, A. Venkateswara ; Bangi, Uzma K.H. ; Kavale, Mahendra S. ; Imai, Hiroaki ; Hirashima, H.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c378t-d129800c1688375a2b1c1c3c06be76aa1779feefba147a54d75a7e209a8d7b653</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2010</creationdate><topic>Aerogels</topic><topic>Ambient pressure drying</topic><topic>Chemistry</topic><topic>Colloidal gels. Colloidal sols</topic><topic>Colloidal state and disperse state</topic><topic>Density</topic><topic>Doping</topic><topic>Exact sciences and technology</topic><topic>Gels</topic><topic>General and physical chemistry</topic><topic>Porous materials</topic><topic>Reduction</topic><topic>Shakers</topic><topic>Shaking</topic><topic>Sodium silicates</topic><topic>Solid-liquid interface</topic><topic>Surface physical chemistry</topic><topic>Thermal insulating material</topic><topic>Titanium dioxide</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Rao, A. Venkateswara</creatorcontrib><creatorcontrib>Bangi, Uzma K.H.</creatorcontrib><creatorcontrib>Kavale, Mahendra S.</creatorcontrib><creatorcontrib>Imai, Hiroaki</creatorcontrib><creatorcontrib>Hirashima, H.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Ceramic Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Microporous and mesoporous materials</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Rao, A. Venkateswara</au><au>Bangi, Uzma K.H.</au><au>Kavale, Mahendra S.</au><au>Imai, Hiroaki</au><au>Hirashima, H.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Reduction in the processing time of doped sodium silicate based ambient pressure dried aerogels using shaker</atitle><jtitle>Microporous and mesoporous materials</jtitle><date>2010-10-01</date><risdate>2010</risdate><volume>134</volume><issue>1</issue><spage>93</spage><epage>99</epage><pages>93-99</pages><issn>1387-1811</issn><eissn>1873-3093</eissn><abstract>The experimental results on the “reduction in the processing time of doped sodium silicate based ambient pressure dried aerogels using shaker”, are reported. Shaking the hydrogels in the shaker in presence of distilled water helps in the removal of sodium salt and reduces the processing time of the aerogels. In addition, doping the gels enormously helps in the improvement of strength and thermal insulation property of the aerogels. Hence, the present paper deals with the study of the effects of shaking speed and shaking period of the granular gels, and doping the gels with titanium dioxide powder (TiO
2) on the physical properties of the aerogels. The aerogels have been characterized by bulk density, volume shrinkage (%), porosity (%) and thermal conductivity. The quantitative analysis of hydrophobicity was done by measuring the contact angle of water on the surface of aerogel. The microstructural and elemental analyses studies were carried out using transmission electron microscopy (TEM), energy dispersive analysis by X-ray (EDAX) and fourier transform infrared (FTIR) spectroscopy. The pore volume and surface area of the aerogels were measured using N
2 adsorption–desorption BET surface analyzer. The thermal stability of the aerogels was checked by thermogravimetric and differential thermal analyses (TGA–DTA). Silica aerogels with low density ∼0.047
g/cc and low thermal conductivity ∼0.057
W/m
K have been obtained by shaking the gels at the speed of 150
RPM for 4
h using the molar ratio of Na
2SiO
3:H
2O:TiO
2:Citric acid:TMCS at 1:146.67:6
×
10
−5:0.54:9.46, respectively. The shaking of the wet gels in a shaker reduces the processing time of the aerogels from 4 to 2
days. These aerogels can be used as thermal insulating materials in ovens, refrigerators and related systems.</abstract><cop>San Diego, CA</cop><pub>Elsevier Inc</pub><doi>10.1016/j.micromeso.2010.05.013</doi><tpages>7</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 1387-1811 |
| ispartof | Microporous and mesoporous materials, 2010-10, Vol.134 (1), p.93-99 |
| issn | 1387-1811 1873-3093 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_1266743048 |
| source | ScienceDirect Freedom Collection (Elsevier) |
| subjects | Aerogels Ambient pressure drying Chemistry Colloidal gels. Colloidal sols Colloidal state and disperse state Density Doping Exact sciences and technology Gels General and physical chemistry Porous materials Reduction Shakers Shaking Sodium silicates Solid-liquid interface Surface physical chemistry Thermal insulating material Titanium dioxide |
| title | Reduction in the processing time of doped sodium silicate based ambient pressure dried aerogels using shaker |
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