4results about How to "Change the pore structure" patented technology

The invention discloses porous carbon with a gradient structure, a preparation method of the porous carbon and application of the porous carbon in a negative electrode of a lithium ion battery. The porous carbon has a gradient structure with compact micropores on the surface and loose macropores inside. The preparation method of the porous carbon comprises the following steps: carrying out oleophylic modification on SiO2 to obtain hydrophobic SiO2; carrying out hydrophilic coating on NH4Cl to obtain PVP (Polyvinyl Pyrrolidone) coated NH4Cl; the preparation method comprises the following steps: mixing coal pitch, methylbenzene, oleic acid, hydrophobic SiO2 and PVP (at) NH4Cl to form a suspension; preparing a spherical precursor by a micro-fluidic emulsification method; and carbonizing, sequentially carrying out oxygen plasma treatment and HF solution etching, and removing the template to obtain the porous carbon with the gradient structure. The gradient distribution of the template and the pore-forming agent is realized through surface modification difference and a microfluidic technology, the pore structure and the particle size can be accurately regulated and controlled, the process is simple, the compatibility is high, the prepared porous carbon can be used as a substrate for a silicon-carbon composite negative electrode material, the volume expansion of silicon can be effectively buffered, and the service life of the silicon-carbon composite negative electrode material is prolonged. And the first coulombic efficiency, the specific capacity and the cycling stability of the lithium ion battery are improved.

This invention relates to the field of medical blood purification equipment technology, and discloses a lipid adsorption material regeneration device, including a main body, a rotary switching module, an adsorption column module, a dynamic pressure balancing system, a fluid pipeline system, and a main controller. The rotary switching module drives the adsorption column module to switch between three stations: treatment, regeneration, and balancing preparation. The adsorption column module is filled with pH-responsive hydrogel material to achieve adsorption and regeneration functions. The dynamic pressure balancing system forms a magnetic circuit through a magnetic piston and electromagnetic drive components in a bypass pipe, which senses and adjusts the pressure inside the column in real time. The fluid pipeline system controls the connection of input and output connectors via an electric push rod to achieve fluid switching. The main controller integrates data from multiple sensors, including pressure, pH, and optical sensors, to intelligently terminate the regeneration process. This invention achieves in-situ online regeneration of the adsorption material, continuous uninterrupted treatment, and precise closed-loop control, improving treatment efficiency and safety, and significantly reducing consumable costs.

The application discloses a kind of strong waterproof high moisture-permeable jacket fabric and preparation method thereof, it is related to fabric technical field.The preparation includes the following steps: step 1: the preparation of TPU film: the spinning solution A and spinning solution B containing different porous chitosan microspheres proportion are formulated;Spinning solution A is spun, and inner layer is obtained;Aldehyde group modified porous chitosan microspheres solution is coated on one side thereof, with the coating surface as receiving layer, spinning solution B is spun on the surface thereof, and outer layer is obtained, dried to obtain composite base film;The composite base film is placed in keratinase solution, pretreated;Then 3-sulfopropyl acrylate potassium salt mixed solution is coated on the surface of outer layer, and ultraviolet light is irradiated at room temperature;Immersed in deionized water, dried to obtain TPU film;Step 2: TPU film is hot-pressed with shuttle fabric to obtain jacket fabric.

The application discloses a catalyst, a preparation method thereof and application of the catalyst in a reaction of preparing succinic anhydride by hydrogenation of maleic anhydride. The catalyst comprises the following components: a carrier and an active component supported on the carrier; the active component is Ni, and at least part of the Ni element exists in a Ni-N-C structure; the content of the Ni is 10-40 wt% and the content of the carrier is 60-90 wt% according to the total mass of the active component and the mass of the carrier being 100%. In the preparation process of the catalyst, a nitrogen-containing compound is added, and the nitrogen-containing compound forms the Ni-N-C structure with the Ni after the catalyst matrix is calcined, so that the pore structure of the catalyst is changed, and the catalyst performance is improved. The catalyst is applied to the reaction of preparing succinic anhydride by hydrogenation of maleic anhydride and has high maleic anhydride conversion rate and succinic anhydride selectivity.