Competition between hydrolysis and condensation reactions of trialkoxysilanes, as a function of the amount of water and the nature of the organic group
作者： Marie-Christine Brochier Salon , Mohamed Naceur Belgacem
DOI: 10.1016/J.COLSURFA.2010.06.002
关键词:
摘要: Abstract The hydrolysis of different alkoxysilane coupling agents was carried out in water/ethanol solutions. weight percentage water the solvent mixture varied from 10 to 100% (w/w). following silanes were studied: 3-aminopropyl triethoxy silane (APES), trimethoxy (APMS), 3-(2-aminoethylamino)propyl (DAMS), 3-[2-(2-aminoethylamino)ethylamino]propyl (TAMS), [3-(phenylamino)propyl] (PAPMS), triethoxy-3-(2-imidazolin-1-yl) propyl (IZPES), vinyl (VES), and 3-methacryloyloxypropyl (MPMS). Acidic conditions selected order enhance formation hydrolyzed molecules slow down consecutive self-condensation reactions. In situ 29Si NMR spectroscopy allowed determination intermediary species, as a function reaction time. When using amino-bearing agents, increase content hindered For other functionalized silanes, such enhanced reactions, but also favored events.
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