6results about How to "Increased diffusion resistance" patented technology

The application discloses a lithium-free high-heat-resistant ceramic mud and a preparation method thereof, and relates to the technical field of ceramic materials. In the preparation of the lithium-free high-heat-resistant ceramic mud, alumina is reacted with 3-(2,3-epoxypropoxy) propyl trimethoxysilane to obtain pre-modified alumina; the pre-modified alumina is reacted with starch to obtain modified alumina; ethyl acetoacetate, isopropyl alcohol, zirconium oxychloride, aluminum sec-butoxide, polyvinylpyrrolidone and N-N dimethylformamide are mixed to form a spinning solution, the spinning solution is electrospun, and then immersed in yttrium oxide sol to obtain alumina-zirconia-yttria composite fibers; the modified alumina, talc, alumina-zirconia-yttria fibers, hydroxypropyl methyl cellulose, glycerol, oleic acid, polyethylene glycol and water are stirred and mixed, and vacuum pugging is carried out to obtain the lithium-free high-heat-resistant ceramic mud. The lithium-free high-heat-resistant ceramic mud prepared by the application has good thermal shock resistance and bending strength after sintering.

This invention discloses an electrochromic smart dimming film and its roll-to-roll preparation method. The dimming film employs an innovative four-layer structure, consisting of a first transparent conductive substrate, an electrochromic composite layer, a composite electrolyte layer with both ion conduction and storage functions, and a second transparent conductive substrate. By integrating the ion storage function into the electrolyte layer, the ion migration path is significantly shortened, thereby achieving an ultrafast response of less than or equal to 0.5 seconds and an ultra-long cycle life of ≥100,000 cycles. Its preparation utilizes a fully wet roll-to-roll coating process, including steps such as electrochromic layer coating and curing, electrolyte layer slot coating, roll lamination, and low-temperature curing. The product of this invention features a simplified structure, superior performance, low cost, and suitability for mass production, and can be widely applied in the automotive, consumer electronics, and building energy conservation fields.

The invention discloses a high-barrier two-way stretching co-extrusion film and a preparation method thereof, belongs to the technical field of film material processing, and aims to solve the technical problem that the mechanical strength and barrier property of a co-extrusion film in the prior art need to be further improved. The invention discloses a modified montmorillonite modified polyethylene glycol terephthalate composite material, which is prepared from the following ingredients in parts by weight: 60 to 70 parts of polyethylene glycol terephthalate, 30 to 40 parts of polyadipic acid m-xylylenediamine, 25 to 35 parts of composite polyester, 17 to 23 parts of composite polyolefin and 12 to 15 parts of modified montmorillonite. The modified montmorillonite modified polyethylene glycol terephthalate composite material is prepared by selecting polyethylene glycol terephthalate and polyadipic acid m-xylylenediamine as basic materials; the composite polyester containing the rigid polyester chain segment, the composite polyolefin with good flexibility and the modified montmorillonite with good reaction activity are used for enhancing the base material, so that the barrier property of the co-extruded film on oxygen and water vapor is effectively improved, and the mechanical property of the co-extruded film is also improved.

A lithium-mediated electrochemical method for ammonia synthesis, relating to the field of ammonia synthesis technology, solves the technical problems of severe side reactions, limited nitrogen mass transfer, and poor interfacial stability in existing lithium-mediated ammonia synthesis systems. Tetra(4-formylphenyl)porphyrin iron and an amino-containing multifunctional organic ligand are added to a mixed solvent of n-butanol and o-dichlorobenzene. An acid catalyst is added, and after stirring until homogeneous, the mixture is degassed and sealed for reaction. The solid product is collected by centrifugation, washed, and dried to obtain COF powder. This powder is then added to an ethanol-water solution, followed by ultrasonic dispersion with Nafion solution. The powder is then drop-coated / sprayed onto the surface of a carbon paper current collector and dried. This powder is used as the working electrode, with a platinum mesh as the counter electrode, a platinum wire as the quasi-reference electrode, and a LiBF4 tetrahydrofuran solution as the electrolyte. Ethanol is used as the proton donor, and electrolysis is performed under a nitrogen atmosphere using a constant current. This invention can be applied to the field of ammonia synthesis technology.

The invention discloses high-barrier-property polyformaldehyde and a preparation method thereof, and is characterized in that based on high-barrier polymer materials such as polyamide and polyvinyl alcohol which are excellent in barrier property, relatively low in cost and relatively good in compatibility with polyformaldehyde, the high-barrier polymer materials are blended with polyformaldehyde to obtain a polyformaldehyde blending system in which a high-barrier polymer is uniformly dispersed; then blow molding is performed in a temperature range between the melting point of the polyformaldehyde and the melting point of the high-barrier polymer material, and the high-barrier polymer component is subjected to solid-phase stretching orientation in a blowing process to form a microfiber structure to be dispersed in a polyformaldehyde matrix, so that not only can the mechanical strength of the polyformaldehyde film be improved, but also the gas barrier property of the polyformaldehyde film can be remarkably improved; and the application range of the high-strength barrier polyformaldehyde is expanded.

The invention provides an adsorbent for purifying diethyltoluenediamine and a preparation method and an application method thereof, and belongs to the technical field of chemical industry. The adsorbent is loaded into a column, the prepared diethyltoluenediamine product is added, eluted, the eluate is collected, and the solvent is removed under reduced pressure to obtain diethyltoluenediamine. The method of the invention can better separate and purify diethyltoluenediamine with high selectivity, and the obtained diethyltoluenediamine has high purity and few impurities, and has broad application prospects.