In this work, hydrophobic of modified SiO2 coating for self cleaning material were prepared by dip-coating methods and solvothermal manual. SiO2 was successfully prepared from silica sand by purified followed sol-gel methods. Tetraetoxysilane (TEOS) and Hexamethyldisilanze (HMDS) were used as surface chemical modification agents with varied mass of SiO2, which were 1, 2, 3, and 4 g. X-ray fluorescence spectrometer (XRF) , X-ray powder diffraction (XRD), Particle size analyzer (PSA), Ultraviolet–visible spectrophotometer (UV-Vis), and Water contact angle (WCA) were employed to investigate the element composition, crystal structure, size of particles, transparency, and hydrophobicity of coating. The results indicated that modified SiO2 coatings has hydrophobic feature as self cleaning material (WCA > 90˚) for indium tin oxide (ITO) glass.
Pelapisan kaca dengan menggunakan prekursor pasir alam silika telah berhasil dibuat sebagai pengisi pada lapisan hidrofobik. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh variasi massa SiO2 terhadap sudut kontak dan transparansi yang dihasilkan. Pasir silika telah dimurnikan dan disintesis dengan TEOS dengan variasi 1 gram, 2 gram, 3 gram, dan 4 gram menggunakan metode sol-gel pada temperatur rendah. Pelapisan bahan dilakukan dua kali menggunakan metode dip-coating manual dan solvothermal dengan campuran HMDS dan n-hexane. Hasil sintesis ini kemudian dilakukan pengujian XRF yang menghasilkan konsentrasi kemurnian silika 90,9%, dilakukan uji XRD yang menghasilkan fasa quartz dan amorphus, uji PSA menghasilkan ukuran partikel 1000nm dan 550.5nm, uji FTIR didapatkan gugus fungsi siloksan dan gugus milik HMDS, uji UV-Vis menghasilkan peningkatan transparansi pada panjang gelombang 200-300nm, uji WCA didapatkan sudut kontak terbesar pada variasi massa 4gram yaitu sebesar 98ᵒ dan sudut kontak terkecil pada variasi massa 3 gram yaitu sebesar 93ᵒ. Serta dilakukan uji SEM didapatkan hasil morfologi dengan hierarki struktur telah berhasil dibuat.
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