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Ceramer coatings from castor oil or epoxidized castor oil and tetraethoxysilane
Author(s) -
Luca Maria Augusta,
Martinelli Márcia,
Jacobi Marly Maldaner,
Becker Patrícia Luíza,
Ferrão Marco Flores
Publication year - 2006
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/s11746-006-1187-x
Subject(s) - castor oil , swelling , materials science , toluene , ultimate tensile strength , scanning electron microscope , chemical engineering , microstructure , nuclear chemistry , polymer chemistry , composite material , chemistry , organic chemistry , engineering
New inorganic‐organic hybrids were synthesized through the reaction of castor oil (CO) or epoxidized castor oil (ECO) with tetraethoxysilane (TEOS). The mass proportions of ECO/TEOS varied from 90∶10 to 60∶40, and films of the material were thermally cured. An IR spectroscopy analysis was performed, and macro‐ and microscopic properties such as adhesion, hardness, swelling in toluene, microstructure (scanning electron microscopy), and T g were investigated as a function of the proportion of their inorganic‐organic precursor. Morphologic studies showed that the hybrid films were homogeneous when lower proportions of the inorganic precursors were used. Hardness and tensile strength increased with TEOS concentration, whereas swelling in toluene decreased with TEOS concentration. Good adhesion was observed throughout the hybrid series.