6results about How to "Improve surface structure" patented technology

The invention relates to the technical field of membrane separation, in particular to a composite ultrafiltration membrane based on blending modification and surface modification and a preparation method and application thereof. The method comprises the following steps: firstly, preparing a polydopamine functionalized multi-walled carbon nanotube through oxidation cross-linking auto-polymerization and adhesion of a dopamine compound in an aqueous solution; dissolving a film-forming polymer, a pore-foaming agent and the prepared polydopamine functionalized multi-walled carbon nanotube in an organic solvent, degassing, and preparing a blend film by adopting a non-solvent induced phase separation method; the prepared blended membrane is sequentially and alternately immersed in a tannic acid solution and an aluminum salt solution, a tannic acid-aluminum ion metal phenolic aldehyde network layer is formed on the surface of the blended membrane through a coordination-driven layer-by-layer self-assembly method, and the composite ultrafiltration membrane is obtained. The composite ultrafiltration membrane prepared by the invention has high flux, high selectivity and excellent anti-pollution performance, and is especially suitable for treating and recycling wastewater containing organic macromolecules such as protein, colloid and the like.

The invention belongs to the technical field of material science and engineering, and discloses calcining equipment for preparing high-purity tantalum oxide, which comprises a workbench, a fluotantalic acid solution produced by a tantalum-niobium liquid-liquid extraction method is used as a raw material, ammonia water and ammonia gas are used for neutralizing and precipitating, and the high-purity tantalum oxide is prepared by controlling different factors such as ammonia water concentration, tantalum liquid concentration, ammonia flushing speed and neutralizing temperature. Tantalum oxide particles are produced, then the produced tantalum oxide particles are poured into the spherical shell, the calcining crucible is started, heat conduction is conducted on the tantalum oxide particles in the spherical shell through temperature rising of the calcining crucible, and therefore the tantalum oxide particles are calcined, meanwhile, the motor is driven, and the motor drives the rotating shaft and the spherical shell to rotate; in the rotating process of the spherical shell, the tantalum oxide particles can be subjected to rolling heating at the bottom of the inner wall of the spherical shell, the calcining effect on the tantalum oxide particles is improved, the tantalum oxide particles can be heated more uniformly, the conversion efficiency of the tantalum oxide particles can be increased, and the surface structure of the particles can be optimized.

This invention provides a silicon-based anode composite material, its preparation method, and its application. The silicon-based anode composite material comprises a silicon-based core, a boronoxy lattice stabilizer, and an inert material. At least a portion of the boronoxy lattice stabilizer is embedded in the lattice structure of the silicon-based core, and the inert material coats the surface of the silicon-based core. This invention helps improve the initial coulombic efficiency and cycle performance of the silicon-based anode composite material.

The invention belongs to the technical field of photocatalysis, and particularly relates to a graphite-phase carbon nitride photocatalyst based on a nitrogen-defect sulfur-doped coupled S-type homojunction as well as a preparation method and application of the graphite-phase carbon nitride photocatalyst. N-defect g-C3N4 (NA-DCN) and S-doped g-C3N4 (NA-SCN) are respectively constructed through nitric acid assisted treatment, and directed migration of photon-generated carriers is realized by using an S-type homojunction interface so as to inhibit recombination; stable interface bonding is formed through component proportion optimization, and the specific surface area and the number of active sites of the material are synchronously increased. Finally, through multi-dimensional structure regulation and control, the problems that the g-C3N4 is limited in photoresponse range, fast in carrier recombination and difficult in consideration of catalytic activity and stability are synchronously solved, the photocatalytic hydrogen production performance of the g-C3N4 is remarkably enhanced, and a reliable technical scheme is provided for large-scale application of an efficient carbon nitride-based photocatalytic material.

The application discloses a preparation method and a preparation system for high-dispersion silicon dioxide for winter tires, and comprises the following steps: S1: solid sodium silicate is put into a static autoclave, steam is added to pressurize to 0.8-1.0 MPa and pressure is kept for 2 hours to obtain concentrated water glass; S2: the concentrated water glass is added with water to prepare a sodium silicate solution with a silicon dioxide content of 20-25 wt%, the sodium silicate solution is statically stored in a storage tank for more than 10 days, and then filtration is performed; and S3: sucrose fatty acid ester and concentrated sulfuric acid with a mass concentration of 98% are added into the sodium silicate solution, and the mixture is reserved after reaction. The silicon dioxide prepared by the application is specially used for winter tires, has high dispersion, uniform particles and good surface structure, can endow the winter tires with more excellent comprehensive performance, and sucrose fatty acid ester is added as a reaction regulator, so that the product has more excellent structural performance.

The utility model relates to the field of decorative stickers, and discloses an easy-to-paste decorative sticker, which comprises a surface layer and bottom paper, the surface layer is connected with the bottom paper through an adhesive, a bottom paper extending part is integrally formed at the corner of the bottom paper, a tearable extending part is connected to the corner of the surface layer through a dotted line adding process, and the bottom paper extending part is connected with the surface layer through an adhesive. The tearable extension part and the bottom paper extension part are staggered, and the bottom paper extension part integrally formed at the corner of the bottom paper provides a clear and easy-to-grasp acting point for a user. When a user tears the backing paper, the user can easily exert force and accurately control the tearing force and direction, the risk that the sticker is wrinkled or damaged due to improper tearing is greatly reduced, the operation success rate is increased, and time and resources are saved.