Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/94804
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dc.titleSilica from hydrolysis and condensation of sodium metasilicate in bicontinuous microemulsions
dc.contributor.authorZhang, K.
dc.contributor.authorGan, L.M.
dc.contributor.authorChew, C.H.
dc.contributor.authorGan, L.H.
dc.date.accessioned2014-10-16T08:40:16Z
dc.date.available2014-10-16T08:40:16Z
dc.date.issued1997-02
dc.identifier.citationZhang, K.,Gan, L.M.,Chew, C.H.,Gan, L.H. (1997-02). Silica from hydrolysis and condensation of sodium metasilicate in bicontinuous microemulsions. Materials Chemistry and Physics 47 (2-3) : 164-170. ScholarBank@NUS Repository.
dc.identifier.issn02540584
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/94804
dc.description.abstractColloidal silica particles ranging from about 10 to 20 nm in diameter were synthesized by the controlled hydrolysis and polymerization of sodium metasilicate (Na2SiO3) in bicontinuous microemulsions at room temperature. The bicontinuous microemulsion system consisted of mixed non-ionic surfactants of NP-5/NP-9, petroleum ether (b.p. 60-80 °C) and an aqueous solution of sodium metasilicate. The system could tolerate as high as 0.2 M sodium metasilicate solution at various pH (4-11). The specific surface area of the silica powders with higher sodium residues of about 2 to 7 wt.% were very low (< 100 m2 g-1) when they were prepared at higher pH (9-11). However, this increased to about 500 m2 g-1 for those samples with less than 0.5 wt.% sodium residue as they were prepared at pH 4. On the contrary, the treatment of some calcined silica powders with hexadecyltrimethylammonium hydroxide also increased their specific surface areas rather significantly.
dc.sourceScopus
dc.subjectBicontinuous microemulsions
dc.subjectSilica particles
dc.subjectSodium metasilicate
dc.typeArticle
dc.contributor.departmentCHEMISTRY
dc.description.sourcetitleMaterials Chemistry and Physics
dc.description.volume47
dc.description.issue2-3
dc.description.page164-170
dc.description.codenMCHPD
dc.identifier.isiutNOT_IN_WOS
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