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dc.contributor.authorHOLMES, JUSTIN DEREK
dc.date.accessioned2010-11-12T16:50:26Z
dc.date.available2010-11-12T16:50:26Z
dc.date.issued2010
dc.date.submitted2010en
dc.identifier.citationLan Chen, Ju Xu, Wen-Hua Zhang, Justin D Holmes and Michael A. Morris, Syntheses of Complex Mesoporous Silicas Using Mixtures of Nonionic Block Copolymer Surfactants: Understanding Formation of Different Structures Using Solubility Parameters, Journal of Colloid and Interface Science, 2010en
dc.identifier.otherY
dc.identifier.urihttp://hdl.handle.net/2262/41156
dc.descriptionPUBLISHEDen
dc.description.abstractThe use of block copolymer (BCP) nonionic surfactant mixtures (including Pluronic, Brij and Tetronic types) as templates for synthesizing porous silica materials of mixed pore sizes is explored here. These systems have important applications because combinations of pore sizes can allow rapid access of reactants (via large pores) whilst providing the very high surface area of small pores for higher reaction rates or size selectivity. Examples of the materials prepared here include pore size bimodal hexagonal p6mm channel structures and cubic Im3m cage structures. It is shown here that the chemical similarity, as indicated by the solubility parameter, of the surfactants is an important factor in determining the pore structure and size distribution (PSD) of the pores. Monomodal pore structures are usually obtained when the solubility parameters of the surfactants are similar and bimodal pore structures when the solubility parameters are reasonably different. When the interaction parameter is very high disordered porous systems are formed. Ternary co-surfactant systems, e.g. P123-25R4-P65, can also yield highly ordered bimodal mesoporous silica with a hexagonal structure.en
dc.description.sponsorshipWe thank BASF (Mount Oliver, New Jersey, USA) for providing the block copolymer surfactants. We also acknowledge SFI (Science Foundation of Ireland) through the BIONANOINTERACT SRC Grant 07/SRC/B1155 and the SFI CRANN CSET grant which supported this work.en
dc.language.isoenen
dc.publisherElsevieren
dc.relation.ispartofseriesJournal of Colloid and Interface Science;353
dc.relation.ispartofseries1;
dc.rightsYen
dc.subjectNano-technologyen
dc.subjectMesoporous Silicasen
dc.titleSyntheses of Complex Mesoporous Silicas Using Mixtures of Nonionic Block Copolymer Surfactants: Understanding Formation of Different Structures Using Solubility Parametersen
dc.typeJournal Articleen
dc.type.supercollectionscholarly_publicationsen
dc.type.supercollectionrefereed_publicationsen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/holmesjd
dc.identifier.rssinternalid68628
dc.identifier.rssurihttp://dx.doi.org/10.1016/j.jcis.2010.09.043en


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