40results about How to "Fine pore size" patented technology

A method is provided for producing insulation materials and insulation for high temperature applications using novel castable and powder-based ceramics. The ceramic components produced using the proposed process offers (i) a fine porosity (from nano-to micro scale); (ii) a superior strength-to-weight ratio; and (iii) flexibility in designing multilayered features offering multifunctionality which will increase the service lifetime of insulation and refractory components used in the solid oxide fuel cell, direct carbon fuel cell, furnace, metal melting, glass, chemical, paper / pulp, automobile, industrial heating, coal, and power generation industries. Further, the ceramic components made using this method may have net-shape and / or net-size advantages with minimum post machining requirements.

The invention relates to compositions that can be used to adsorb low concentration, preferably, for example less than 15 ppm, of unwanted or target substances. Typically the absorbance can be from an enclosed vapor phase. Such absorbency is accomplished in a contained substantially enclosed gaseous volume or atmosphere using a composition comprising a cyclodextrin compound and a polyethylenimine that can have an absorbency capability for low concentrations of unwanted or target substances. Such absorbency can be obtained with thermoplastic materials used in the form of bulk polymer or a film, fiber, web, woven fabric, nonwoven fabric, sheet, packaging and other such structures including or surrounding the enclosed volume. The adsorbent of the invention is typically used in the context of an enclosed volume, also known as an enclosed ambient vapor phase that contains the adsorbent of the invention and the unwanted or target substances at a concentration that is not desirable. The concentration should be reduced to non-offensive sensed limits or a limit that does not produce a biological response.

The nonwoven fabric sheet of the present invention is characterized by a porosity in the range of 0.3 to 0.7 and an average pore size in the range of 0.5 μm to 5.0 μm. The nonwoven fabric sheet of the present invention preferably has a maximum pore size (μm) / average pore size (μm) ratio of 1.30 or lower. The nonwoven fabric sheet of the present invention is obtained by press-molding a nonwoven fabric at a temperature lower than the melting point of the thermoplastic resin which constitutes the nonwoven fabric sheet. According to the present invention, there is provided a nonwoven fabric sheet that has a high porosity, small uniform pore sizes and excellent productivity, which can suitably be used in various applications such as filters, light diffusing material, liquid absorber and heat insulating materials; and a method for producing the nonwoven fabric sheet.

Electroosmotic flow systems containing two or more electroosmotic flow elements which meet at a junction, at least one of the electroosmotic flow elements having a substantial charge ratio. The electroosmotic flow elements have matching flux ratios. The electroosmotic flow elements may contain porous materials whose terminal portions are shaped to increase the surface area exposed to the fluid at the junction. Examples of such terminals are illustrated in the figure.

The invention discloses bio-based aromatic hydrocarbon polyester polyol for controlled-release fertilizer. The bio-based aromatic hydrocarbon polyester polyol is characterized by being synthesized according to a method comprising the following steps: sucking fatty acid (1mol), diethylene glycol (2mol), glycerol (2mol) and the like into a reaction kettle in vacuum according to a sequence; adding terephthalic acid (3mol), phthalic anhydride (2mol) and trimethylol propane (2mol) from a solid feeding hole in the reaction kettle; after stirring in the reaction kettle for 1h, displacing air in the reaction kettle once with nitrogen gas; slowly raising the temperature of the reaction kettle to 180 DEG C to 240 DEG C, carrying out esterification reaction to distill water and maintaining the temperature for 4h; when the temperature of the top of an esterification tower is lower than about 95 DEG C and no water is discharged, sampling and testing an acid value; when the acid value is less than 15mgKOH / g, supplementing a catalyst Tio2 / SO4-2 solid super acid which accounts for 0.03 percent of the total amount; continually keeping heat and reacting for 1h; then carrying out vacuum extraction for about 2h and controlling the vacuum degree to be -0.085mPa to -0.095mPa; when the acid value is less than 2mgKOH / g, the reaction is completed; then cooling and filtering and packaging to obtain a bio-based aromatic hydrocarbon polyester polyol finished product.

The invention provides a double-side micro-hole burr steel belt and manufacturing method and device thereof, wherein the double-side micro-hole burr steel belt molding device is invented based on the principle of holing by the double rollers opposite rolling, and the key is that the invention uses a group of holing rollers instead of traditional convex and concave die structure, and the holing rollers are in pure rolling state, the steel belt passes through the rollers form the gap between the rollers to be holed to form micro-holes, the burrs on the hole edge are respectively bended to opposite to from fiber-shaped burr on the surface of the steel belt. The holing rollers can be divided into two types, one type roller is equably disposed with geometrical teeth, whose shapes includes rectangle, taper, trigon or pyramid, on its surface, and another type roller is provided with geometrical annular slot, whose slot angle is trigon or rectangle, on its surface; according to the process requirement, the rollers can combine with that of another type, or combines with that of the same type. The holed steel belt made in this manner has hole shape arranged in various forms, and the hole diameter is very small and compact, the density of the burr hole is up to 625 pre square centimeter, and the burr on the surface of the steel belt is fiber-shaped; and the production speed is 20 times faster than that of the traditional punching die.

The present invention discloses an electrochemical process for water splitting for production of oxygen using porous Co3O4 nanorods with a considerably low overpotential and high exchange current density. The present invention further discloses a simple, industrially feasible process of for preparation of said nanostructured porous cobalt oxide catalyst thereof.