Synthesis and characterization of thin sol gel films enhanced with UV curing technique
Abstract
ABSTRACT
The sol gel films that were coated on glass microslide surface was prepared by facile sol-gel method and enhanced with UV curing. The UV curing is an alternative step instead of solely rely on heat treatment which is industrially unfriendly due to time consuming that is encountered during annealing process. The hydrophobicity phenomenon is governed by synergistic effect of roughness filler created by random distribution of nanosilica as well as low surface energy attributed by long chain fluoroalkylsilane. The contact angle obtained is above 150o and the degree of transparency is in the range of 85-90% which was measured by UV-Vis spectroscopy. The chemical composition was evaluated by FTIR spectroscopy and it shows the presence of Si-O-C peak that indicates the fluoroalkylsilane peak is successfully attached to nanosilica thus created hydrophobic surface. The surface topography was analyzed with AFM that gives confirmation that uniform distribution of nanosilica on microslide surface.
ABSTRACT
Filem sol gel yang telah disalutkan pada permukaan slaid mikro gelas disediakan dengan kaedah sol gel yang mudah dan dipertingkatkan dengan pematangan UV. Pematangan UV merupakan satu kaedah alternatif selain daripada pergantungan sepenuhnya kepada rawatan haba yang kurang mesra industri disebabkan masa proses dijalani yang lebih lama semasa proses sepuhlindap. Fenomena kekalisan air ditentukan oleh kesan sinergistik pengisi kekasaran tercipta oleh taburan rawak nanosilika serta tenaga permukaan yang rendah disumbangkan oleh fluoroalkilsilana berantai panjang. Sudut sentuh diperoleh atas daripada 150o dan darjah lutsinar diperoleh di antara 85-90% yang diukur dengan spektroskopi UV-Vis. Komposisi kimia diukur dengan spektroskopi FTIR dan ia menunjukkan kehadiran puncak Si-O-C yang membuktikan puncak fluoroalkilsilana berjaya tercangkuk dengan nanosilica lalu menghasilkan permukaan kalis air. Topografi permukaan sampel dianalisis dengan AFM dan ia memberikan pengesahan yang taburan nanosilika yang uniform pada permukaan slaid mikro.
