Author/Authors :
Tadjarodi، A. نويسنده Departments of Chemistry, Iran University of Science and Technology, Tehran, Iran , , Haghverdi، M. نويسنده Department of Chemistry, Faculty of Science, Imam Khomeini International University, Qazvin, Iran , , Mohammad، V. نويسنده Department of Chemistry, Faculty of Science, Imam Khomeini International University, Qazvin, Iran , , Rajabi، M. نويسنده Department of Mechanical Engineering, Babol Noshirvani University of Technology, Shariati Street, Babol, Iran. ,
Abstract :
در اين مقاله آيروژل سيليكاي آب گريز با روش پليمريزاسيون سل-ژل اسيد-باز و با استفاده از تترا اتيل اورتوسيليكات به عنوان پيش ماده سنتز شد. محصول تهيه شده بوسيله ي طيف سنجي مادون قرمز (FT-IR)، آناليز گرماسنجي آناليز ديفرانسيلي گرماسنجي (TG/DTA) ، پراش اشعه X (XRD) ، BET و ميكروسكوپ الكتروني روبشي (SEM) مورد آناليز قرار گرفت. چگالي محصول g /cm3 0.027 و مساحت سطح ويژه ي آن درحدودm2/g 655.58 و حجم حفره cm3/g0.4831 محاسبه شد.
Abstract :
The silica aerogel was prepared by the acid–base sol–gel
polymerization of tetraethylorthosilicate precursor followed by
ambient pressure drying. The prepared silica aerogels were
characterized by Fourier transform infrared (FT-IR), Thermo-
gravimetric and differential thermal analysis (TG/DTA), X-ray
diffractometer (XRD), Energy dispersive X-ray microanalysis (EDX),
Brunauer–Emmitt–Teller (BET) and Scanning electron microscopy
(SEM). The result silica aerogel is a light and crack-free solid with
very low bulk density 0.027 g /cm3
, high specific surface area 655.58
m2
/ g and large pore volume 0.4831 cm3
/ g. The average size of
particles was calculated using a Microstructure Measurement program
and Minitab statistical software.
