چكيده لاتين :
The organic-inorganic hybrid coatings based on epoxy resin and tetraethoxysilane
have been prepared and studied. These hybrid networks possess excellent optical
transparency and nano scale microphase separation. These hybrid materials can
be used for coating aluminiumalloy (AA) substrates. Formation of the inorganic phase,
from tetraethoxysilane (TEOS) by sol-gel process, organic phase and hybrid network
were characterized by Fourier Transform infrared (FTIR), attenuated total reflectance
infrared (ATR-IR), and 29Si NMR spectroscopic techniques, and thermal gravimetry
analysis (TGA) methods. The chemical structure of obtained network affects the morphology
of the coating. So, morphology of the fractured surface was observed by scanning
electron microscopy (SEM). It is found that the average diameter of particles is 167
nm, which indicates the transparency of the hybrid system. TGA results show that crosslinking
between the epoxy resin and silica increases the thermal stability of the system.
Key Words:
Sol-gel process;
hybrid inorganic-organic;
telraethoxysilane;
epoxy resin.
INTRODUCTION
(*) To whom correspondence should be addressed.
E-mail: A.Rahimi@ippi.ac.ir
In recent years, new kinds of inorganic-
organic hybrid materials have
been prepared via sol-gel process.
These hybrids are also like
nanocomposites because of the small
size of formed inorganic structure,
usually of the nanometer size and are
often optically transparent systems.
The sol-gel process is of interest in
preparing these materials due to its
mild conditions such as low temperature
and pressure. This process provides
a convenient route to combine
inorganic and
