Dispersion of nanoparticles in a polymeric matrix
AssigneeLanda Labs (2012) Ltd.
InventorsSagi ABRAMOVICH, Omer ASHKENAZI, Yehuda TOW
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Abstract
The present disclosure relates to a method for stably dispersing nanoparticles of a material in a curable polymer, the method comprising: a) providing a curable pre-polymer; b) providing particles of the material; and c) compounding the curable pre-polymer and the particles at a compounding temperature sufficiently high to obtain a curable melt mixture and sufficiently low for the curable melt mixture to develop a pre-determined viscosity upon compounding. The compounding is performed by applying a shear force to the heated curable melt mixture, whereby nanoparticles are formed from the particles, the viscosity of the melt being such that the nanoparticles remain dispersed in the mixture.
Claims21
A method for stably dispersing nanoparticles of a material in a curable pre-polymer, the method comprising:
- a) providing a curable thermoplastic pre-polymer;
- b) providing particles of the material, the material having a density of 2.2 g/cm3 or more;
- and
- c) compounding the curable pre-polymer and the particles at at least one compounding temperature sufficiently high to obtain a melt mixture and sufficiently low for the melt mixture to develop a pre-determined viscosity upon compounding, the melt mixture having a compounding temperature not exceeding 400° C. and being substantially devoid of a solvent capable of dissolving the curable thermoplastic pre-polymer;
- wherein the compounding is performed by applying substantially only a shear force to the melt mixture, the shear force being such that the particles are reduced to nanoparticles and the pre-determined viscosity being such that the nanoparticles are dispersed in the mixture, the dispersed nanoparticles having an average particle size (DV50 or DN50) of 100 nm or less, 75 nm or less, or less 50 nm or less.
Dependencies are inferred from the claim text.