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dc.contributor.authorYang, Dongjiang
dc.contributor.authorXu, Yao
dc.contributor.authorXu, Wujun
dc.contributor.authorWu, Dong
dc.contributor.authorSun, Yuhan
dc.contributor.authorZhu, Huaiyong
dc.date.accessioned2017-05-03T15:56:35Z
dc.date.available2017-05-03T15:56:35Z
dc.date.issued2008
dc.date.modified2011-08-30T06:21:01Z
dc.identifier.issn13645501
dc.identifier.doi10.1039/B804967J
dc.identifier.urihttp://hdl.handle.net/10072/40458
dc.description.abstractMacroporous silica films with methyl groups grafted on their surface were prepared from polymethylhydrosiloxane (PMHS) and tetraethylorthosilicate (TEOS) without templates. Compared to the conventional template syntheses, this approach has several advantages. First, it avoids the removal of templates, which is sometimes an environmentally unfriendly procedure. Second, it does not require a post-synthesis grafting to form the hybrid structures with methyl groups on the silica surface. Third, the pore size and hydrophobicity (expressed by the water contact angle) of the film can be tuned readily. By adjusting the amount of PMHS used in the synthesis and introducing hexamethyldisilazane (HMDS) we can tune the pore size in a wide range from 50 nm to 500 nm. The hydrophobicity increases substantially as the pore size decreases. Evidently, the reaction mechanism of this synthesis is different from the conventional template synthesis. A tentative mechanism is proposed: the hydrogen gas released from PMHS results in the formation of the macropores in the films. With excellent hydrophobicity, optical transmittance and thermal stability, the obtained silica films have potential applications in the semiconductor industry.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.languageEnglish
dc.language.isoeng
dc.publisherRoyal Society of Chemistry
dc.publisher.placeUnited Kingdom
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom5557
dc.relation.ispartofpageto5562
dc.relation.ispartofissue45
dc.relation.ispartofjournalJournal of Materials Chemistry
dc.relation.ispartofvolume18
dc.rights.retentionY
dc.subject.fieldofresearchColloid and Surface Chemistry
dc.subject.fieldofresearchChemical Sciences
dc.subject.fieldofresearchEngineering
dc.subject.fieldofresearchcode030603
dc.subject.fieldofresearchcode03
dc.subject.fieldofresearchcode09
dc.titleTuning pore size and hydrophobicity of macroporous hybrid silica films with high optical transmittance by a non-template route
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.date.issued2008
gro.hasfulltextNo Full Text
gro.griffith.authorYang, Dongjiang


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