عنوان المقالة: preparation and study properties of xerogel silica using sol-gel method International journal of application or innovation in engineering & managemen
In This study synthesis of inorganic oxide material by a sol-gel technique through the formation of colloidal suspension (sol) and
gelation of the sol into the gel enables incorporation of heat-sensitive active substances into the material during processing. Sol
can be further processed into forms, such as monoliths(rod shape).The objectives of this study were to evaluate sol-gel derived
silica gel as an implantable (monoliths). The structural properties of the prepared samples were studied ,using X-ray diffraction
(XRD) and Fourier transform infrared (FTIR), UV-VIS. Spectroscopy of xerogel silica and liner shrinkage of the samples.the
sample prepared by mixing TEOS,ethonal,water,and HCL ,TEOS and ethonal were mixing and stirred for 10 min at room
temp.then 0.1 MHCL was gradually added to the solution until a water to TEOS molar ratio of R=2,R=5.The results shows that,
silica xerogel has amorphous structure ,FTIR spectroscopy has been used to find the amount of water (OH) ,it was found that
when increase in temperatures the R (R=water:TEOS molar ratio) (R=2,R=5) the decrease intensity of H2O absorbance are
consistent with loss of physisorbed water. Transmission spectra shows that the final samples have good transparency and
homogeneity (the reflective index about sample R=2,n=1.41and R=5,n=1.45), and the linear shrinkage for sample R=5 less about
the R=2.it was found that, increase in temp. for (R=2,R=5) will decrease intensity of H2O absorbance which indent that the water
will defused outside the sample.
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تاريخ النشر
22/04/2013
الناشر
International Journal of Application or Innovation in Engineering & Management (IJAIEM)
سيناء ابراهيم حسين | Seenaa Ibraheim Hussein | 5447