Premium
Organic–Inorganic Coatings Based on Epoxidised Castor Oil/APTES/TEOS
Author(s) -
Becchi Denize Maria,
Luca Maria Augusta,
Martinelli Márcia,
Mitidieri Sydnei
Publication year - 2011
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/s11746-010-1651-5
Subject(s) - castor oil , materials science , chemical engineering , microstructure , curing (chemistry) , ultimate tensile strength , aluminium , adhesion , homogeneous , composite material , organic chemistry , chemistry , engineering , physics , thermodynamics
Two series of organic–inorganic hybrid films were prepared from epoxidised castor oil (ECO) and the inorganic precursor 3‐aminopropyltriethoxysilane (APTES), and the combination of APTES with tetraethoxysilane (TEOS) with different organic to inorganic proportions. Films were pre‐cured at room temperature under inert atmosphere and subsequently submitted to thermal curing. The macro‐ and microscopic properties of the films, including adhesion, hardness, microstructure and thermal properties, were determined as a function of the proportion of ECO to inorganic precursors. Morphologic studies showed that the hybrid films were microscopically homogeneous. The hardness and tensile strength of the films increased with increased concentrations of inorganic precursor. All of the films exhibited good adhesion to an aluminium surface and worked as an efficient barrier against corrosion.