My photosensitive organic inorganic hybrid sol gel

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Unformatted text preview: sation of vinyl-functional silsesquioxane precursor namely vinyltriethoxysilane. Crack -free and smooth surface films were achieved by performing spin coating technique with film thi ckness were around 1 micron. Films exhibit active photosensitivity towards UV light by obtaining high absorption bands in UV -Vis spectrometry at 246.2 nm due to the unimolecular cleavage activities of benzoin isobutyl ether that act as photoinitiators in the composition. UV light irradiation has been executed by using high pressure Mercury lamp at 435 to 200 nm. Spectroscopic reflectometry indicated that UV irradiation process has induced for reduction in film thickness of up to 5 % and increment in refract ive index from 1.425 to 1.435. Structural changes studies using FTIR and Raman spectrometry indicated that UV irradiation facilitates addition polymerization of vinylic groups (C=C) to form Si(CH 2)nSi linkage within the film matrix. In addition to that Raman spectrometry has allowed the identification of vibration bands of the hydroxyl groups associated with terminal silanol bonds and the free molecular water in the film matrix. It also provided alternative technique for quantifying inorganic network connec tivity grade of fabricated silsesquioxane compared to silica films. Micropatterning involving UV irradiation with presence of photomask was applied for channel development and investigation on photosensitivity of the patterned surface by field emission scanning electron microscope described formation of well defined waveguides channel and high resistant against 5 % NaOH solution indicated that UV irradiated area has high chemical durability towards alkaline etching solution. 120 3rd ICYC 2010 Universiti Sains Malaysia 23rd-25th June 2010 POSTER PRESENTATION (INDUSTRIAL) IND-P1 SULFONATION OF PETROLEUM BASE OILS WITH DEVELOPMENT OF THE EMULSIFIERS Abdulbaset M. Elgellal and Imad. H. Alwahib Department of Chemistry, Faculty of Science, University of 7 October, Misurata, Libya E-mail: This work is concerned with the sulfonation of petroleum base oils using s...
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This note was uploaded on 02/17/2011 for the course CHEMISTRY 101 taught by Professor Csr during the Spring '11 term at University of Louisville.

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