In method 1, the synthesized poly(EGDMA-co-AN) microspheres (100 mg) were dispersed in 10 mL of ethanol using bath-type sonication for 10 min for infiltration of the solution into the internal pores of the microspheres, and then magnetically stirred for 50 min at room temperature ...
By filtering the final slurry and reslurrying or removing water from the final slurry, in either case to give a total solids content by weight of 8 per cent and spray-drying, microspheres of clear, glasslike structure are obtained which may be washed and dried for use in fluidized catalytic...
PS microns and nanoparticles impart numerous characteristics to the composites including thermal stability, high surface area with compact volume, effective interfacial interactions, and enhanced mechanical properties. Recently, yolk-shell PS microspheres were also prepared by one spot reversible addition-...
The silica spheroids prepared according to the present invention generally have the size in the range 1-400 microns, preferably in the range 1-200 microns. Sub-micron aggregates may be present as unwanted material at the end of the process. ...
It is a long-standing dream to fabricate micron-sized inorganic spheres that have nanocompartments enclosed by a permeable shell and thus resemble the shape of natural cells. Here, we demonstrate a novel synthesis protocol to attain this goal for the fir
For some purposes it has been found very desirable to employ silica gel catalysts in the form of microspheres, i. e. fine, hard spherical particles having a diameter of the order of 30 to 300 microns. Thus, in systems employing fluidized solid catalysts, wherein the catalyst is maintained ...
U.S Pat. No. 3,795,524 (Sowman) discloses a method of making refractory articles (especially fibers, but also films, flakes, and microspheres) from either an aqueous solution of water-soluble aluminum and boron compounds or a colloidal dispersion of silica and water-soluble or dispersible alu...
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In a preferred procedure for preparing the catalyst, zinc oxide is mixed with an aqueous suspension of silica hydrogel microspheres which may have a diameter of from 100 to 800 microns, water is removed from the resulting mixture, the resulting material is shaped, for example by extrusion, and...
The inner diameter of a glass capillary is usually several hundred microns. After a beam of light is incident from the side, WGM resonance easily occurs in the capillary regardless of whether the refractive index of the filling medium in the capillary is greater than or less than the refractive...