PEMBUATAN DAN KARAKTERISASI FIBER PVA YANG MEMUAT SUPERPARAMAGNETIK FE3O4 DENGAN METODE ELEKTROSPINING

Fiber Polyvinyl Alcohol (PVA) containing Fe3O4 nanoparticles have been successfully prepared by the method electrospining. The fiber is made from a mixture solution of Fe3O4 nanoparticles in a solution of 10% PVA with a weight ratio of 10%, 50% and 70%. Electrospining process done at the needle tip from collector distance of 15cm with 15kV voltage. Fe3O4 particles bond with PVA known from testing Fourier Transform Infrared (FT-IR). Test results spectrometer Ultra Violet Visible (UV-Vis) by simply using Visible light with a wavelength of 400-700 nm, indicating higher absorption values with increasing concentration of Fe3O4 in fiber. Analysis of Scanning Electron Microscopy (SEM) of each variation of the mass ratio suggests that the higher the ratio of the mass effect on fiber diameter were also greater (with a diameter range of 100-300 nm). The calculation of the size of the diameter of the crystal using the Scherrer equation from the X-Ray Diffraction (XRD) show that the Fe3O4 crystal fiber has filled in the smaller sizes (19±1 nm) than in the state of powder (20±2 nm). Analysis of Transmission Electron Microscopy (TEM) show that the Fe3O4 particles 16±8 nm has a larger size, when loaded in fiber (which is 25±10 nm), than in powder form because of agglomeration. Vibrating Sample Magnetometer Analysis (VSM) show that the fiber samples (Fe3O4/PVA) are superparamagnetic with following results: saturation magnetization (Ms), coercivity field (Hc) and remanent magnetization (Mr) ie Ms=83,08 emu/g, Hc=0,07 kOe and Mr =26 emu/g compared with a sample of Fe3O4 particles that Ms = 29.45 emu/g, Hc = 0.05 kOe and Mr = 8.62 emu/g. This behaviour is caused by the presence of PVA that wrap Fe3O4 particles. Keywords: Electrospinning, Fibers, Magnetite (Fe3O4), Polyvinyl Alcoho