摘要:
The present invention discloses a method for preparing inverse opal photonic crystal fibers. In this method, by means of vertical deposition of colloidal spheres (micron scale or nanoscale), of polystyrene shell-core structured spheres and silica particles, the inverse opal colloidal crystal fiber stripes having a length of about 3.5 cm as well as an adjustable width and thickness is obtained. The invention provides a convenient method and achieves inverse opal photonic crystal fiber stripes with a high yield and a controllable size, and there is no crack on the surface of the fibers or inside the fibers. Furthermore, the inverse opal photonic crystal stripes of the invention can be peeled off from the surface of a glass slide and used conveniently.
摘要:
The invention relates to a filament comprising a core material (CM) comprising an inorganic powder (IP) and the core material (CM) is coated with a layer of shell material (SM) comprising a thermoplastic polymer. Further, the invention relates to a process for the preparation of said filament, as well as to three-dimensional objects and a process for the preparation thereof.
摘要:
A wet blanket obtained by impregnating a blanket including bio-soluble inorganic fibers with a colloidal silica liquid. A cured blanket obtained by curing the wet blanket.
摘要:
An apparatus for producing metal oxide nanofibers includes a jetting unit, a mixing unit, a heating unit, and a cooling unit. The jetting unit jets particles made of a metal. The mixing unit prepares a mixture by mixing the metal particles and a gas containing an oxidizing component that includes oxygen in molecules of the component. The heating unit heats the mixture to raise the temperature of the mixture up to a temperature at which the metal evaporates. The cooling unit cools the product thus-produced in the heating unit.
摘要:
The present invention relates to an improved process for producing a biodegradable and/or absorbable silica sol material which is advantageous especially with regard to the reproducibility of the material, the rapidity of the synthesis and the possibility of being able to produce the silica sol material on an industrial scale. A further subject matter of the invention relates to a biodegradable and/or absorbable silica sol material which can be produced by the synthesis process according to the invention.
摘要:
The invention concerns a nanofiber structure with immobilized organic agens that consists of silica nanofibers whose surface was modified with aminoaikyialkoxysilane and of subsequently immobilized organic agens. The invention also concerns a method of preparation of the nanofiber structure with immobilized organic agens, while silica nanofibers are prepared by electrostatic spinning from the initial sol synthesized by a sol-gel method from tetraalkoxysilane, heat-treated and their the surface modified by a solution of aminoaikyialkoxysilane and organic agens is then immobilized on the modified surface of the nanofibers.
摘要:
Proppant is used to keep open a fissure in a reservoir created by hydraulic or other action. The proppant demonstrates a reduced specific gravity controlled by the geometry of the structure of the proppant. Proppant must be capable of withstanding the hydrostatic environment of the hydraulic pumping system, pass through a perforation in the casing of the well, travel into the fissure, and, upon reduction of hydrostatic pressure, withstand the closure pressure of the formation. A proppant can have neutral buoyancy or substantial neutral buoyancy and can yet be capable of withstanding the hydraulic and closure pressures and have a tubular structure hollow in the center with a wall of material sufficiently strong to withstand the majority of closure pressures.
摘要:
Described herein are nanofibers and methods for making nanofibers that have a plurality of pores. The pores have of any suitable size or shape. In some embodiments the pores are “mesopores”, having a diameter between 2 and 50 nm. In some embodiments, the pores are “ordered”, meaning that they have a substantially uniform shape, a substantially uniform size and/or are distributed substantially uniformly through the nanofiber. Ordering of the pores results in a high surface area and/or high specific surface area. Ordered pores, without limitation, result in a nanofiber that is substantially flexible and/or non-brittle. The nanofibers and methods for making nanofibers may be used, without limitation, in batteries, capacitors, electrodes, solar cells, catalysts, adsorbers, filters, membranes, sensors, fabrics and/or tissue regeneration matrixes.
摘要:
Monolithic gravity-laid inorganic fiber webs that are greater than about 5 cm in thickness are disclosed. Methods of making and using such webs are also disclosed. The gravity-laying process comprises mechanically separating inorganic fibers and collecting the fibers as a monolithic thick web, and may comprise blending of multiple types of inorganic fibers and/or blending of inorganic particulate additives with the fibers.
摘要:
Disclosed herein is a method for producing a sheet including a silica aerogel, the method including (S1) gelling a water glass solution in a mixture of an alcohol and water to prepare a wet gel, (S2) hydrophobically modifying the surface of the wet gel with a non-polar organic solvent, an organosilane compound and an alcohol, (S3) dissolving the hydrophobically modified silica gel and a polymer in an aprotic organic solvent to prepare an electrospinning solution, and (S4) electrospinning the electrospinning solution to produce a fiber web including a silica aerogel, and a sheet in which a polymer and a silica aerogel coexist in the form of a fiber.