Hello,
I am trying to form a pellet of PMMA particles. I have tried centrifuging for 1 hour at 26000 RPM (highest the centrifuge I have will go) but the particles do not form a pellet they just clump/form strands thoughout the liquid.
I have also tried in a 1.5mL eppendorf (narrower tube) only going to 15000RPM max speed for 1 hour but the particles form a layer at the top.
Not sure if these particles are impossible to form a pellet or if there is anything else I can do?!
I have about 20% particles to water ratio and am using a 1mL volume in a centrifuge vial that is quite high diameter (compared to eppendorf) at around 1cm diameter.
Thank you.
Dear all, if I understood well the question, you want to coarsening the nanoparticles, if so, you didn't need centrifuge, just search for 'induction of Oswald Ripenning', you will find different techniques to provoke nanoparticles agglomeration to peletets. My Regards
I don't know if it makes any sense for your research, but I've used a hydraulic press to make the pellets of PEG-coated magnetic nanoparticles.
Dear all, if I understood well the question, you want to coarsening the nanoparticles, if so, you didn't need centrifuge, just search for 'induction of Oswald Ripenning', you will find different techniques to provoke nanoparticles agglomeration to peletets. My Regards
If you don't need the pellet to form below the supernatant, can you use a filtered centrifugation method? You would essentially collect the particles on the filter and let the solvent filter down. There are many filter sizes available from Millipore with their Microcon series.
I also think, you need to separate/ filter (using filter papers/ syringe filters ) your solid stuff/NPs first. Then, try to make pellets along or with binder by applying relevant techniques which used to press into mold. I have no idea about the final usage of your pellets. Read about it and try to make.
Interface and mechanical properties of poly(methyl methacrylate)–fiber composites
Tingxiu Xie Guisheng Yang /https://doi.org/10.1002/app.20819
Pyrolysis of filled PMMA for monomer recovery
https://doi.org/10.1016/S0165-2370(00)00171-6
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