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Self‐Catalyzed Synthesis of Organo‐Silica Nanoparticles
Author(s) -
Ottenbrite Raphael M.,
Wall Jason S.,
Siddiqui Junaid A.
Publication year - 2000
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2000.tb01709.x
Subject(s) - comonomer , silanes , siloxane , catalysis , hydrolysis , nanoparticle , pulmonary surfactant , hydrophobic silica , chemical engineering , condensation , materials science , particle (ecology) , particle size , chemistry , polymer chemistry , silane , organic chemistry , nanotechnology , polymer , physics , oceanography , ethylene , geology , engineering , thermodynamics
A procedure has been developed which utilizes aminopropyltriethoxysilane (APS) as the catalyst and a comonomer in the production of hybrid organo‐silica nanoparticles. Particles ranging from ca. 100 to 500 nm can be prepared using organo‐silanes of the type R′Si(OR) 3 , where R′= Me, vinyl, allyl, or other hydrophobic groups and R = Me or Et, in a water/surfactant solution. Based on elemental analysis, up to 10 mol% of APS was incorporated into the siloxane particle network. It is thought that the amino groups are located mainly on the surface due to their hydrophilicity and APS′ relatively slow rate of hydrolysis and condensation.