Anadolu 11. Uluslararası Uygulamalı Bilimler Kongresi, Diyarbakır, Turkey, 29 - 30 December 2022, pp.76
The poly (acrylic acid) / Tetra ethyl ortho silicate (PAA/TEOS) hybrid thin films were obtained through simultaneous polymerization of the organic monomer and sol-gel process of the inorganic precursor. The organic/inorganic (Ormosil) composites were produced at a one-pot synthesis of the sol-gel process with free radical polymerization simultaneously surfactant-free medium. Ammonium persulfate (APS) was used as an initiator for radical polymerization, while NaOH is the catalyst for the sol-gel reaction. The one-step one-pot reaction lasted for 2 hours at 75 oC. The thin films of the TEOS/PAA Ormosil surface were obtained by a dip coating method. Dip coating of the glass slides was carried out with a mechanical dipper which moves vertically at a constant speed of 400 mm/min at room temperature. To achieve the best conditions for a simultaneous synthesis TEOS concentration and AA/TEOS ratio were determined according to the wettability performance of thin films. The surface characterization of thin films was determined by air, underwater contact angle, and light transmittances. In addition, the surface morphology of the ormosil surface was characterized by AFM and SEM. The superhydrophilic surface was determined for water contact angle in the air. However, underwater contact angles were determined by using hexadecane and dichloromethane drops. The contact angle results indicated that the superhydrophilic and underwater superoleophobic ormosil PAA/TEOS surfaces were obtained. The contact angle values of water hexadecane and dichloromethane were found as 8o,170o, and 156o, respectively.