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Hierarchically Macroporous Cryogels of Polyisobutylene and Silica Nanoparticles

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dc.contributor.authorTuncaboylu, Deniz C.
dc.contributor.authorOkay, Oğuz
dc.contributor.institutionauthorTUNCABOYLU, DENIZ CEYLAN
dc.date.accessioned2020-10-29T17:26:19Z
dc.date.available2020-10-29T17:26:19Z
dc.date.issued2010-05-18T00:00:00Z
dc.description.abstractOrganic inorganic hybrid materials attract particular interest because of their excellent mechanical properties. Here, we report the synthesis of hybrid cryogels consisting of interpenetrated polyisobutylene and silica networks. The gels were prepared by cross-linking of butyl rubber in cyclohexane containing silica nanoparticles using sulfur monochloride (S2Cl2) as a cross-linking agent. The microstructure of the hybrid networks formed at subzero temperatures exhibits two generations of pores: 10(1) mu m sized large pores due to the cyclohexane crystals acting as a template during gelation and, 10(-1)-10(0) mu m sized small pores between the aggregates of the nanoparticles. The nanoparticles in hybrid cryogels accumulate within the large pores where cyclohexane crystals originally resided. Compared to the organogel networks with an elastic modulus of a few kPa, hybrid networks exhibit a modulus of elasticity around 300 kPa. Hybrid cryogels can be converted into organic cryogels by dissolving the silica component in aqueous hydrofluoric acid, while removing the polymer component by calcination results in porous silica networks with 10(-1) mu m sized pores.
dc.identifier.citationTuncaboylu D. C. , Okay O., -Hierarchically Macroporous Cryogels of Polyisobutylene and Silica Nanoparticles-, LANGMUIR, cilt.26, ss.7574-7581, 2010
dc.identifier.doi10.1021/la904369g
dc.identifier.scopus77952375349
dc.identifier.urihttp://hdl.handle.net/20.500.12645/25721
dc.identifier.wosWOS:000281444400026
dc.titleHierarchically Macroporous Cryogels of Polyisobutylene and Silica Nanoparticles
dc.typeArticle
dspace.entity.typePublication
local.avesis.id42c7ba83-f5a2-4e78-87ca-f3a27f34a929
local.publication.isinternational1
relation.isAuthorOfPublicationac53edd0-862b-4855-8c83-91c45c3cfd61
relation.isAuthorOfPublication.latestForDiscoveryac53edd0-862b-4855-8c83-91c45c3cfd61
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