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Complexity of silicate/aluminosilicate polymerization: some insights using a small‐angle X‐ray scattering study
Author(s) -
Singh Puyam S.
Publication year - 2007
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889806056081
Subject(s) - aluminosilicate , silicate , polymerization , colloid , small angle x ray scattering , colloidal silica , chemical engineering , depolymerization , materials science , nanoparticle , aluminate , chemistry , inorganic chemistry , scattering , polymer chemistry , polymer , organic chemistry , nanotechnology , catalysis , optics , composite material , coating , physics , cement , engineering
The small‐angle X‐ray scattering study reported here is on growth processes of particles that occurred during silicate/aluminosilicate polymerization starting from clear or colloidal solutions. Two polymerization reaction systems starting from clear homogeneous solutions of silicate monomers or oligomers, and two other polymerization reaction systems starting from silica colloidal solutions, were performed. Early growth of clearly defined silicate particles from a clear solution system was observed, whereas the scattering contrast of early growth processes from another clear system was close to that of the mother liquor and its weak scattering resulted from loosely aggregated structures. In the case of a colloidal solution system, the growth of silica particles was observed from the initial size of the silica nanoparticle reactant by reaction with aluminate anions on its surface, whereas in another colloidal system, depolymerization of the initial silica nanoparticle reactant into smaller silicate units and subsequently polymerization of the smaller silicate units with aluminate anions in solution was observed.