Bacterial cellulose-silica organic-inorganic hybrids

dc.contributorUniversidade Estadual Paulista (Unesp)
dc.contributorUniversidade Federal de Uberlândia (UFU)
dc.contributorUniv Toulouse 3
dc.date.accessioned2014-05-20T13:29:51Z
dc.date.available2014-05-20T13:29:51Z
dc.date.created2014-05-20T13:29:51Z
dc.date.issued2008-06-01
dc.identifierJournal of Sol-gel Science and Technology. Dordrecht: Springer, v. 46, n. 3, p. 363-367, 2008.
dc.identifier0928-0707
dc.identifierhttp://hdl.handle.net/11449/10121
dc.identifier10.1007/s10971-007-1669-9
dc.identifierWOS:000255753300017
dc.identifier2115942621694174
dc.identifier0000-0003-0195-3885
dc.description.abstractBacterial cellulose (BC) hydrated membranes present nanometric reticulated structure that can be used as a template in the preparation of new organic-inorganic hybrids. BC-silica hybrids were prepared from BC membranes and tetraethoxysilane, (TEOS) at neutral pH conditions at room temperature. Macroscopically homogeneous membranes were obtained containing up to 66 wt.% of silica spheres, 20-30 nm diameter. Scanning electron micrographs clearly show the silica spheres attached to cellulose microfibrils. By removing the cellulose, the silica spheres can be easily recovered. The new hybrids are stable up to 300 degrees C and display a broad emission band under UV excitation assigned to oxygen-related defects at the silica particles surface. Emission color can be tuned by changing the excitation wavelength.
dc.languageeng
dc.publisherSpringer
dc.relationJournal of Sol-Gel Science and Technology
dc.relation1.745
dc.relation0,477
dc.rightsAcesso restrito
dc.sourceWeb of Science
dc.subjectbacterial cellulose
dc.subjectsilica
dc.subjectorganic-inorganic hybrids
dc.titleBacterial cellulose-silica organic-inorganic hybrids
dc.typeArtículos de revistas


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