7results about How to "Increase exchange rate" patented technology

This utility model relates to the field of automotive parts technology, specifically an automotive brake disc, including an outer disc body and an inner disc body disposed on the back of the outer disc body. A connecting member is disposed between the outer disc body and the inner disc body. The outer disc body has several first heat dissipation holes, which are connected to the interior of a heat dissipation cavity. This automotive brake disc, through the coordinated use of the outer disc body, inner disc body, heat dissipation cavity, connecting member, first heat dissipation holes, mounting part, mounting hole, and second heat dissipation holes, allows for rapid heat generation due to friction between the brake disc and brake pads during braking. The heat dissipation grooves, first heat dissipation holes, and second heat dissipation holes on the surfaces of the outer and inner disc bodies, with their unique structure and layout, guide air to form a complex airflow when the brake disc rotates, increasing the contact time and area between the air and the brake disc surface, significantly improving heat exchange efficiency and enhancing heat dissipation performance. Furthermore, the heat dissipation grooves increase the effective heat dissipation area of ​​the brake disc.

The application provides a cation exchange membrane and a preparation method and application thereof, and belongs to the technical field of cation exchange membranes.The method provided by the application is free of volatile organic compounds, toxic and harmful monomers or heavy metal components, and the raw material itself is environmentally friendly.The method is free of harmful gas emission and hazardous waste generation, and is environmentally friendly.The cation exchange membrane material prepared by the method is chemically stable, easy to recycle after being discarded, free of additive precipitation during use, and free of pollution to the treatment system.The water-soluble dispersion bonding medium adopted by the application forms rich and uniform connected pore structures in the cation exchange membrane after being washed by water, greatly reduces ion migration resistance, significantly alleviates membrane polarization, and improves ion exchange rate and energy utilization efficiency when used for separation.The method provided by the application is free of complex chemical reactions, harsh process conditions, and standardized operation steps, and is easy to realize large-scale continuous production.

The utility model relates to substation technical field provides a small prefabricated substation with reinforcing structure, including bottom plate, embeds the hardened ground, be provided with air cavity in the bottom plate, is set up with a plurality of storage holes on the outside wall of bottom plate, is slidably installed with fastening unit in the storage hole, the upside of bottom plate is provided with a plurality of gas outlets, is provided with pressure limiting valve for maintaining the pressure intensity in air cavity in the gas outlet, the outer box body is set up on the bottom plate, the outer box body has the inner chamber of bottom opening, the outer wall of box body is provided with air inlet, is provided with filter plate at air inlet, the air injection spare is set up in the inner chamber, and the air in outer box body is drawn into the air cavity, and the fastening unit is under the pressure of air pressure and is in abutment with the hardened ground. The setting of pressure limiting valve makes the high pressure environment in air cavity, and the stable connection of bottom plate and hard ground is realized through high pressure air to push the piston positioning rod, and the wind resistance of prefabricated substation is effectively improved.

This invention belongs to the field of photocatalysis technology, specifically relating to a microbial-MOF photosensitizing material, its preparation method, and its application. The microbial-MOF photosensitizing material comprises antibiotic-degrading bacteria and a metal-organic framework shell encapsulating the surface of the antibiotic-degrading bacteria. The metal-organic framework in the microbial-MOF photosensitizing material provided by this invention has a porous structure, enabling the encapsulated microorganisms to receive sufficient light, enhancing light absorption capacity, and facilitating rapid carrier migration. Ultimately, this gives the microbial-MOF photosensitizing material superior photoelectrocatalytic activity, lowers the photoelectrocatalytic reaction energy barrier, and increases the kinetics of antibiotic degradation.

The present application provides a kind of narrow molecular weight distribution PVP copolymer and its preparation method and application, the PVP copolymer has the structure shown in formula I, in the present application, NVP monomer is copolymerized with allyl polyoxyethylene ether in redox system, then hydroxyl end group is sulfonated and handled by adding sulfonating agent to the copolymer reaction solution obtained, to obtain the PVP copolymer.The chain transfer effect of allyl polyether is utilized in the present application, the molecular weight distribution of PVP copolymer is effectively controlled, and the ionized end group treatment of strong polarity is carried out, the chain segment uniformity of PVP copolymer is improved, the space steric hindrance of polyether branch, the charge repulsion of ionic group significantly improve the fullness of chain extension of PVP in casting solution, to improve the exchange rate of casting solvent and precipitator, obtain the membrane pore structure of uniform pore size, high pore size rate, stable structure.

This invention provides a polyurethane / chitosan composite porous fiber and its spinning method. A polyurethane solution and a chitosan solution of specific concentrations are prepared, and a coaxial wet spinning technique is employed. The outer axis is the polyurethane solution, and the inner axis is the chitosan solution. The coagulation bath is a mixture of water, ethanol, and alkali solution. After coagulation and molding, nascent fibers are obtained, and finally, vacuum freeze-drying is performed to obtain the polyurethane / chitosan composite porous fiber. This invention adjusts the spinnability and formability of the fiber by regulating the concentration of the spinning solution, and achieves control over the molding process of the composite spinning solution through the synergistic effect of the components in the coagulation bath. This promotes the molding of the composite fiber without destroying its coaxial structure, achieving successful preparation of nascent fibers with a coaxial structure. The spinning method of this invention is simple, low-cost, and can be continuously produced, making it suitable for industrial mass production. The prepared composite porous fiber possesses high elasticity, high strength, and good warmth retention, and has significant market application value.

The application discloses a method for removing titanium impurities in phosphoric acid solution, which comprises the following steps: extracting the phosphoric acid solution containing titanium impurities by using an organic solvent, and collecting the organic phase; mixing the organic phase with the phosphoric acid solution, adding an oxidant and hydrofluoric acid, and mixing uniformly to obtain a mixed solution; adding an ammonium fluoride solution dropwise into the mixed solution to react, and obtaining a reaction solution; washing, clarifying and separating the phases of the reaction solution, and back-extracting the organic phase to obtain the phosphoric acid solution from which the titanium impurities are removed; the removal method is characterized in that: firstly, trace H2O2 is used to convert titanium into active peroxotitanium species; secondly, the initiation effect of NH4F is used to activate the activity of fluoride ions; finally, HF is used as a main fluorine source to form a stable fluorotitanium complex and migrate to the acid phase, and low-titanium purified phosphoric acid is obtained after separation, so that the removal of titanium impurities is realized.