Magnetite Nano-material Coating of a Polymeric Membrane Author: David Igla Supervisor: Dr May Lim Resources and Infrastructure for the Future Introduction Aims and Objectives Coating a hydrophobic membrane with magnetite nano-material to remotely heat up a membrane through magnetic induction has many applications: To modify and coat a hydrophobic polypropylene membrane with magnetite (Fe3O4) nano-materials in order to: • Drug delivery into the human body 1. Investigate temperature change of the magnetite-coated membrane during induction heating under different currents. • Filter out and kill viruses from the air 2. Determine the microstructures of the magnetite-coated membrane • Improving membrane performance Scanning Electron Microscopy (SEM) Method Acrylic Acid Grafting onto Polypropylene Membrane Polypropylene Membrane grafted with Poly-acrylic acid O HO Magnetite Coated Membrane Membrane soaking in Acrylic acid Polymerisation of Acrylic acid on membrane under UV lamp Coating the Membrane with Magnetite Nano-Material Fe2+ Fe3 SEM images by Dr Rhiannon Kuchel There are magnetite particles attached to the surface and within the membrane’s pores and structure Magnetic Induction Pluronic127 + Coated Membrane after Magnetic Induction with a solution of Pluronic-127 Solutions of Fe3+, and Fe2+ were mixed NH4+ F e 3O4 Ammonium hydroxide was added to precipitate the Magnetite particles (Fe3O4) After magnetic induction the magnetite particles on the membrane are cracked 60 Temperature (°C) 55 Magnetite Coated Membrane 300 A 50 45 Polypropylene Membrane 300 A 40 35 Magnetite Coated Membrane 400 A 30 25 Polypropylene Membrane 400 A 20 0 Magnetite Particles are pushed through the filter cartridge onto the polyacrylic acid grafted membrane Characterisation • SEM • Magnetic Induction 120 240 360 480 600 Time (s) There is a faster rate of heating and a higher final temperature during magnetic induction with a membrane that is coated with magnetite nano-material and with increasing current. Conclusion • Magnetite particles are able to attach to a hydrophobic membrane through modification to both the membrane and the particles • A Magnetite coated membrane can be remotely heated up with Magnetic Induction
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