Document Detail


Surface-deposited acid/base on glass microfibers in formation of (3-aminopropyl)triethoxysilane-[2-(3,4-epoxycyclohexyl)ethyl]heptaisobutyloctasilsesquioxane bioverlay.
MedLine Citation:
PMID:  16584237     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Silanization of macroporous glass microfiber filters with (3-aminopropyl)triethoxysilane (APTES) and subsequent binding of [2-(3,4-epoxycyclohexyl)ethyl]heptaisobutyloctasilsesquioxane (E-POSS) to the amine-terminated surface of microfibers was studied. Prior to the silanization, minute quantities of concentrated aqueous solutions of hydrochloric acid or ammonia were adsorbed in the filters while attachment of E-POSS molecules to APTES overlay was not specially catalyzed. Analysis of DRIFT, XPS, and 13C CP/MAS NMR spectra has shown that the formation of APTES overlay is affected differently by the surface-deposited acid or base. It was proved by XPS that microfibers with the adsorbed acid take up higher amounts of covalently attached APTES by 42% and, subsequently, of E-POSS by 65% than microfibers with the adsorbed ammonia. The molecular mechanics model calculations, which were made using silica as a template, have shown that approximately two-layered APTES coating can be built on the model surface if complete hydrolysis of ethoxy groups and vertical condensation of APTES species are assumed.
Authors:
Galina A Tishchenko; Jirí Brus; Jirí Dybal; Michal Pekárek; Zdenka Sedláková; Miroslav Bleha; Zdenek Bastl
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Langmuir : the ACS journal of surfaces and colloids     Volume:  22     ISSN:  0743-7463     ISO Abbreviation:  Langmuir     Publication Date:  2006 Apr 
Date Detail:
Created Date:  2006-04-04     Completed Date:  2007-07-09     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9882736     Medline TA:  Langmuir     Country:  United States    
Other Details:
Languages:  eng     Pagination:  3633-9     Citation Subset:  IM    
Affiliation:
Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic. tiscenko@imc.cas.cz
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MeSH Terms
Descriptor/Qualifier:
Chemistry, Physical / methods
Fourier Analysis
Glass / chemistry*
Magnetic Resonance Spectroscopy
Microscopy, Electron, Scanning
Models, Chemical
Molecular Conformation
Molecular Structure
Organosilicon Compounds / chemistry*
Silanes / chemistry*
Software
Spectrometry, X-Ray Emission / methods
Spectrophotometry / methods
Surface Properties
Chemical
Reg. No./Substance:
0/(2-(3,4-epoxycyclohexyl)ethyl)heptaisobutyloctasilsesquioxane; 0/Organosilicon Compounds; 0/Silanes; 0/amino-propyl-triethoxysilane

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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