The interaction of dibutyltin dilaureate with tetraethyl orthosilicate in sol-gel systems
作者： Juan Méndez-Vivar
DOI: 10.1007/S10971-006-6351-0
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摘要: Sols composed of dibutyltin dilaureate (DTL) and tetraethyl orthosilicate (TEOS) were prepared using a mixture methyl ethyl ketone (MEK) acetone as the solvent in order to study interaction between oligomeric Sn Si species. The hydrolysis molar ratio r (r=nH2O/nM (M: Si, or Si+Sn) was 2. use an acid basic catalyst avoided, sols are intended be used formulation potential stone consolidants. studied by several spectroscopic techniques including Small Angle X-ray Scattering (SAXS), 29Si 119Sn NMR, Fourier Transform Infrared (FTIR) spectroscopy diffraction (XRD). According results lauric produced DTL modifies condensation path species, leading formation two types chains: linear swollen multiparticle diffusion-limited aggregates, depending on Sn/Si. NMR indicated that catalizes giving result higher extents species Sn-Si compared pure sol. Based Radial Distribution functions (RDF) FTIR results, heterocondensation occurred.
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