Gas dispersion manufacture of nanoparticulates, and nanoparticulate-containing products and processing thereof
View Patent ↗In one aspect, the present invention relates to a method of making multi-phase particles that include nanoparticulates and matrix, which maintains the nanoparticulates in a dispersed state. A flowing gas dispersion is generated that includes droplets of a precursor medium dispersed in a gas phase. The precursor medium contains liquid vehicle and at least a first precursor to a first material and a second precursor to a second material. The multi-phase particles are formed from the gas dispersion by removing at least a portion of the liquid vehicle from the droplets of precursor medium. The nanoparticulates in the multi-phase particles include the first material and the matrix in the multi-phase particles includes the second material.
1. A gas dispersion method for making nanoparticulates, the method comprising: generating a flowing gas dispersion, as generated the gas dispersion comprising droplets of a precursor medium dispersed in a gas phase, with the precursor medium comprising liquid vehicle and at least two precursors, a first said precursor being a precursor to a first material and a second said precursor being a precursor to a second material, the second material being a surface-modifying material comprising a dispersing agent capable of inhibiting agglomeration and promoting dispersion of nanoparticulates in a dispersion medium; in the gas dispersion, forming particles dispersed in the gas phase, the particles dispersed in the gas phase each comprising the second material and nanoparticulates that include the first material; the forming particles comprising removing at least a portion of the liquid vehicle from the droplets; wherein, the particles are decomposable in a liquid dispersion medium to release the nanoparticulates from the particles for dispersion of the nanoparticulates in the liquid dispersion medium; and wherein, when the particles are decomposed in and the nanoparticulates are dispersed in the liquid dispersion medium, at least a portion of the second material modifies a surface of the dispersed nanoparticulates, wherein the second material is chemically reactable with the nanoparticulates to functionalize the surface of the nanoparticulates.
2. A gas dispersion method for making nanoparticulates, the method comprising: generating a flowing gas dispersion, as generated the gas dispersion comprising droplets of a precursor medium dispersed in a gas phase, with the precursor medium comprising liquid vehicle and at least two precursors, a first said precursor being a precursor to a first material and a second said precursor being a precursor to a second material, the second material being a surface-modifying material comprising a dispersing agent capable of inhibiting agglomeration and promoting dispersion of nanoparticulates in a dispersion medium; in the gas dispersion, forming particles dispersed in the gas phase, the particles dispersed in the gas phase each comprising the second material and nanoparticulates that include the first material; the forming particles comprising removing at least a portion of the liquid vehicle from the droplets; wherein, the particles are decomposable in a liquid dispersion medium to release the nanoparticulates from the particles for dispersion of the nanoparticulates in the liquid dispersion medium; and wherein, when the particles are decomposed in and the nanoparticulates are dispersed in the liquid dispersion medium, at least a portion of the second material modifies a surface of the dispersed nanoparticulates, wherein after the forming particles, the method comprises: decomposing the particles in the liquid dispersion medium; and in the liquid dispersion medium, releasing the nanoparticulates from the particles, wherein during or after the decomposing, the method comprises: reacting the second material with the nanoparticulates to functionalize a surface of the nanoparticulates.