4results about How to "Improve microporous structure" patented technology

The application relates to the field of electrochemical energy storage technology and discloses a nitrogen-doped porous nanocarbon material, wherein the nanocarbon material has microporous structure and mesoporous structure, the BET specific surface area of the nanocarbon material is 300-3000 m 2 / g, the proportion of the specific surface area in micropores in the total specific surface area is higher than 60%; the total pore volume of the nanocarbon material is 0.5-2 cm 3 / g, the proportion of the pore volume in micropores in the total pore volume is higher than 50%; the mass percentage of surface carbon of the nanocarbon material is 70-95% measured by X-ray photoelectron spectroscopy; the mass percentage of nitrogen is 1-20%; and the nanocarbon material has a sheet-like appearance. The preparation method can realize high nitrogen doping, catalytic graphitization and activation pore-forming of the nanocarbon material at the same time. When the nitrogen-doped nanocarbon material is applied to a supercapacitor and a water-based alkaline electrolyte is used, the specific capacitance of a single electrode can be up to 252 F / g at a current density of 1 A / g, and the nanocarbon material exhibits excellent capacitive performance.

The application discloses low-density monolithic porous carbon and a microemulsion preparation method and application thereof, and relates to the field of foam carbon materials. The porous carbon material comprises a three-dimensional network structure formed by cross-linking and stacking of cavity carbon nanoparticles, and has a density of 0.16-0.35 g / cm 3 ; the phenolic resin is used as a precursor, the foaming agent, i.e., the microemulsion droplet of the imidazole compound, is used as a template, and a green solvent is used, and the monolithic porous carbon is obtained through a sol-gel reaction, drying and pyrolysis. The imidazole compound and the hydrophilic end of the foaming agent interact to form a flexible small-molecule interface film, reduce the interfacial tension and stabilize the emulsion droplet. The foaming agent is decomposed to form a cavity spherical structure during carbonization. The monolithic porous carbon has a developed porous structure and surface hydrophobicity, is beneficial to constructing a high-efficiency electrocatalytic reaction microenvironment, and is reflected in improving the surface reaction gas concentration and inhibiting excessive mass supply, so as to improve the electrocatalytic reaction selectivity. Based on the morphology, pore structure and surface properties, the monolithic porous carbon also has application potential in the fields of water purification and heat insulation and flame retardation.

The invention discloses a PPS / PTFE composite filter material based on hot-pressing reinforcement and a preparation method thereof, and belongs to the technical field of industrial flue gas purification. The material is prepared by taking a PPS needled felt as a base material, coating the surface of the PPS needled felt with a PTFE (Polytetrafluoroethylene) foam coating containing nano silicon dioxide and carrying out hot-pressing treatment at 200 DEG C. According to the method, by optimizing the hot pressing process, the bonding strength of the PTFE coating and the PPS base material is remarkably enhanced, and the pore structure of the material is effectively improved. The filtering efficiency of the obtained filter material on particles with the particle size larger than or equal to 1.0 micrometer reaches 92.6% or above, the abrasion resistance is greatly improved, the abrasion loss of a coating is only 0.0325-0.0337 g after 300 times of abrasion, the filtering resistance is kept between 136 Pa and 160 Pa, and meanwhile the filter material has good temperature resistance and corrosion resistance and is suitable for efficient purification of high-temperature and high-corrosion industrial flue gas.

This application relates to the textile field, specifically disclosing a thermal insulation fabric and its production method. The thermal insulation fabric comprises, from the outside in, a PTFE garment film, an adhesive layer, a polyethersulfone / polyurethane mixed fiber wadding, a hollow PBT core-sheath composite fiber layer, an adhesive layer, and a polyurethane / zirconia aerogel composite fiber layer. The polyurethane / zirconia aerogel composite fiber layer is woven from polyurethane / zirconia aerogel composite fibers, which have a core-sheath structure. It is prepared by coaxial wet spinning of the sheath solution and the core solution, followed by impregnation in a tert-butanol aqueous solution, pre-freezing, and freeze-drying. The sheath solution is a polyurethane solution, and the core solution is a polyurethane solution containing zirconia aerogel powder, with a mass ratio of zirconia aerogel powder to polyurethane of 0.2-0.3:1. The thermal insulation fabric of this application has the advantages of good thermal insulation effect, high mechanical strength, high compression resilience, and relatively fluffy texture.