Abstract
Nanosilica (NS) was synthesized using the sol-gel method, with tetraetylortosilicate (TEOS) as a precursor, ammonia (NH3) as a base catalyst, water as hydrolysis and ethanol as solvent. Polyvinyl alcohol is added to the sol solution, acting as a capping agent. The purpose of this study was to determine the average particle size, morphology and nanosilica particle size distribution of TEOS by adding variations in the concentration of PVA and without the addition of variations in the concentration of PVA. The particle size and particle morphology were analyzed using Scanning Electron Microscopy (SEM). The distribution of NS particles was analyzed using Particle Size Analyzer (PSA). The average size of control NS particles (55.55 µm), NS + PVA 5% (39.22 µm), NS + PVA 10% (41.13 µm), and NS + PVA 15% (40.26 µm) . The morphology obtained is shaped like amorphous. The narrow particle size distribution is NS + PVA 5%, compared to other samples. KEYWORDS : nanosilica; PVA; sol-gel method; TEOS
Highlights
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Polyvinyl alcohol is added to the sol solution
The morphology obtained is shaped like amorphous. The narrow particle size distribution is
Summary
Dwi Rasy Mujiyanti1,2)*, Meirina Dwi Surianthy2), Ahmad Budi Junaidi1) 1) Program Studi Kimia FMIPA Universitas Lambung Mangkurat, Banjarbaru, 70714, Indonesia 2) Laboratorium Anorganik, Laboratorium FMIPA Universitas Lambung Mangkurat, Banjarbaru, 70714, Indonesia. Penelitian Ardiansyah (2015) pada NS dengan molar rasio NH3/TEOS 0,20 dilakukan penambahan PVA dengan perbandingan untuk 100 mL larutan campuran silika:PVA adalah 20:80, dihasilkan NS dengan ukuran partikel sebesar 18,63 nm. Berdasarkan latar belakang di atas sintesis NS dari TEOS dengan katalis NH3 (dengan berbagai variasi) masih dihasilkan ukuran NS yang belum seragam, maka dari itu penelitian ini ditambahkan suatu zat yang dapat membentuk dan mengontrol ukuran patikel dalam proses sol-gel yaitu PVA dengan berbagai variasi untuk mengetahui perbandingan larutan campuran silika:PVA yang menghasilkan ukuran NS yang seragam dan mengkarakterisasi dengan peralatan scanning electron microscope (SEM), dan particle size analyzer (PSA) agar diketahui pengaruh variasi konsentrasi PVA terhadap ukuran rata-rata partikel, morfologi dan distribusi partikel
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