I synthesized ZnO nanoparticle but can not make a pallet out of them what binder can be used to bind the pallet
Cyril Robinson Azariah J.
ZnO powder Polyvinyl Alcohol (PVA) NaOH pellets Deionized or distilled water Mixing equipment (e.g., mortar and pestle, ball mill, or a mechanical mixer) Pellet die and hydraulic press or manual pellet press PVA solution preparation equipment (e.g., beakers, magnetic stirrer, hot plate) Laboratory oven Powder Preparation:a. Measure the desired amount of ZnO powder required for your experiment and place it in a clean, dry container. b. If the ZnO powder contains any agglomerates or large particles, crush and grind it to ensure a fine and uniform powder. Binder Preparation:a. Weigh the appropriate amount of PVA powder, considering the desired binder-to-powder ratio. b. In a beaker, add the required amount of deionized or distilled water. c. Slowly add NaOH pellets to the water while stirring gently. The addition of NaOH should be done carefully due to the exothermic reaction it generates. d. Stir until the NaOH pellets are completely dissolved in the water. This will result in a sodium hydroxide solution. e. Gradually add the PVA powder to the sodium hydroxide solution while continuously stirring. Heat the mixture gently on a hot plate to aid in dissolution. f. Continue stirring until the PVA is fully dissolved and you obtain a homogeneous PVA-NaOH solution. Allow it to cool to room temperature. Mixing ZnO and Binder:a. Slowly add the PVA-NaOH solution to the ZnO powder while continuously mixing to ensure even distribution. b. Continue mixing until you achieve a homogenous mixture. The resulting consistency should resemble damp sand and should not be overly wet or dry. Pellet Formation:a. Place the ZnO and PVA-NaOH mixture into a pellet die of the desired size and shape. b. Apply pressure using a hydraulic press or manual pellet press to compress the mixture into a pellet. The applied pressure will depend on the equipment and the desired pellet density. Drying:a. Carefully remove the newly formed pellet from the die and place it on a clean surface. b. Allow the pellet to air dry for some time to remove excess moisture. c. Transfer the pellet to a laboratory oven and heat at a low temperature (e.g., 80-100°C) for several hours to ensure complete removal of moisture. The exact drying time may vary depending on the size and thickness of the pellet. Finalization:a. Once the pellet is completely dry, remove it from the oven and let it cool to room temperature. b. Your ZnO pellet with the PVA-NaOH binder is now ready for use in your desired experimental application.
Materials Needed:
Procedure:
Please exercise caution when working with NaOH, as it is a strong base, and follow safety protocols and guidelines for handling chemicals.
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Arnab Mukherjee
Hi Asma Nazir
You may use PVA or polyvinyl alcohol as a binder. 1st make a 3/5% (w/v) of PVA solution (aqueous phase) and mix ~1-2 drops to the material. Make the pellet and dry it at 200 C for 2 h. Then sinter the pellet at 500-600 C for 2h.
This process may help you.
Regards
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