Skripsi
PENGARUH VARIASI TEGANGAN LISTRIK TERHADAP KARAKTERISTIK MEMBRAN PVDF SnO2 UNTUK FILTRASI AIR
The results indicate that electric voltage variation significantly affects the characteristics of PVDF–SnO₂ membranes. Increasing the voltage from 15 kV (PSE 1) to 30 kV (PSE 3) leads to improvements in pore size and distribution, where PSE 3 shows the highest average pore size (6.03 ± 0.12), while PSE 1 has the lowest (4.44 ± 0.17). In terms of mechanical properties, PSE 1 exhibits the highest Young’s modulus and tensile strength (107.71 and 2.1334 MPa) due to its denser structure, whereas PSE 3 has the lowest modulus (13.315) but the highest elongation (6.54 mm), indicating greater elasticity. Water contact angle results show that PSE 3 has the lowest value (~44.7°), indicating the highest hydrophilicity, while PSE 1 has the highest (~49.8°). Clean water permeability results reveal that PSE 3 achieves the highest flux due to its more open and homogeneous pore structure, whereas PSE 1 shows the lowest flux due to higher flow resistance. PSE 2 exhibits the lowest overall performance as it represents a transitional structure. Additionally, all membranes experience flux decline over time due to compaction, which increases hydraulic resistance. Keywords: PVDF membrane; SnO₂; electric field; phase inversion; membrane morphology; mechanical properties; water flux, Wettability.