14results about How to "Improve surface hydrophilicity" patented technology

The present application relates to the technical field of environmental microbial degradation of plastics, and particularly relates to a non-decarboxylation klebsiella SW-03 and application thereof in degrading PLA / PBAT plastics, the non-decarboxylation klebsiella SW-03 strain is preserved in Guangdong Microbial Culture Collection Center on December 5, 2025, the preservation number is GDMCC NO:67412, and the preservation address is the 5th floor of the 59th building of the Institute of Microbiology, Guangdong Academy of Sciences, 100, Middle Martyrs Road, Guangzhou City; the non-decarboxylation klebsiella SW-03 is isolated from eutrophic lake environment, can take PLA / PBAT plastics as the only carbon source, realizes the biodegradation of PLA / PBAT plastic film under normal temperature environment, and solves the problems of the current plastic degradation functional strain resource shortage and limited application scene.

The invention provides an E7 peptide functionalized polyimide fiber scaffold as well as a preparation method and application thereof, and relates to the technical field of medical treatment. The E7 peptide functionalized polyimide fiber scaffold provided by the invention comprises a polyimide fabric, the surface of the polyimide fabric is coated with a polydopamine coating; and the surface of the polydopamine coating is coupled with E7 peptide. According to the E7 peptide functionalized polyimide fiber scaffold provided by the invention, the E7 peptide is combined with the PI fabric, so that the E7 peptide functionalized polyimide fiber scaffold has excellent mechanical properties, thermal stability, surface hydrophilicity and biocompatibility. The BMSCs can be effectively recruited, and the osteogenic differentiation capability of the BMSCs can be enhanced. The scaffold provides a novel material selection with mechanical strength and biological activity for tissue engineering repair of MIRCT, and has clinical potential.

The application discloses a method for modifying a hyaluronic acid grafted polyamide membrane against pollution by a thermal method and application thereof, and relates to a method for modifying a polyamide membrane against pollution and application thereof. In order to solve the problem of poor anti-pollution performance of the existing polyamide membrane, the application uses hyaluronic acid for surface grafting modification of the polyamide membrane. Due to the super-hydrophilic property of the hyaluronic acid, a hydration layer is formed on the surface of the modified polyamide membrane, effectively hinders the adhesion of pollutants, and meanwhile, part of the short chains of the hyaluronic acid can promote the desorption of the membrane surface pollutants while being hydrolyzed, so that the flux recovery rate of the membrane is improved, and the operation cost is reduced. Compared with the traditional polyamide membrane or other modification methods, the anti-pollution performance of the hyaluronic acid modified polyamide membrane is significantly improved, and the anti-pollution efficiency is excellent in the treatment of shale oil fracturing flowback wastewater. The application belongs to the technical field of water treatment membrane preparation.

This application belongs to the field of nanophotocatalytic materials technology, and discloses a mesoporous TiO2 / coumarin-doped graphitic carbon nitride (CM-CN) composite photocatalyst, its preparation method, and its application. The invention first uses a crystallization-driven single-colloidal assembly method to prepare TiO2 particles with a uniform mesoporous structure. Then, dihydroxycoumarin is mixed with urea using a thermal polycondensation method and calcined at high temperature to obtain CM-CN. Next, CM-CN and mesoporous TiO2 are self-assembled in a solvent using a solvent dispersion-promoting technique to obtain the mesoporous TiO2 / CM-CN composite photocatalyst. This mesoporous TiO2 / CM-CN composite photocatalyst possesses a hierarchical pore structure, high specific surface area, excellent hydrophilicity, and strong interfacial bonding, achieving efficient transfer and separation of photogenerated carriers, and enabling the construction of a green, stable, and highly active photocatalytic system. The material preparation process is simple, the raw material cost is controllable, there is no secondary pollution, and the photocatalytic performance is significant, showing good potential for large-scale production and widespread application.

This invention relates to the field of polypropylene film technology and discloses a preparation process for biaxially oriented polypropylene film. The invention involves melting, extruding, and water-cooling polypropylene resin and polymer-loaded silver nanoparticles in an extrusion casting machine, followed by transverse and longitudinal stretching, heat setting, and winding in a biaxial tensile testing machine to obtain a biaxially oriented polypropylene film. The polymer-loaded silver nanoparticles exhibit good compatibility with polypropylene and have minimal impact on the mechanical properties of the polypropylene film. The polymer-loaded silver nanoparticles are uniformly dispersed in the polypropylene film matrix, and the smaller particle size of the silver nanoparticles exposes more antibacterial sites, significantly improving the antibacterial properties of the film. Furthermore, polyitacrylamide contains hydrophilic carboxyl groups, amide bonds, and bisphenol groups; its addition to the polypropylene film helps reduce the water contact angle and improve surface hydrophilicity.

This invention relates to the field of mineral processing technology, and particularly to a depressant for molybdenum sulfide ore and a flotation separation method and application for copper-molybdenum sulfide minerals. The depressant comprises polyphenols; the polyphenols have the molecular formula C0.05. 32 H 30 O 11 The molecular weight is 590.57 g / mol, and the degree of polymerization is 2-11. The molybdenum sulfide mineral depressant is used for the flotation of copper-molybdenum sulfide minerals. The copper-molybdenum sulfide minerals contain chalcopyrite and molybdenite, with a mass ratio of 1-2:1. This invention provides a molybdenum sulfide mineral depressant and a flotation separation method and application for copper-molybdenum sulfide minerals. The aim is to solve the problems of high toxicity, high loss rate, and high intermingling of existing copper-molybdenum sulfide mineral separation flotation depressants, and to achieve effective separation of chalcopyrite and molybdenite.

A long-lasting antifouling polyamide reverse osmosis membrane, its preparation method, and its applications are disclosed, belonging to the field of membrane separation technology. The membrane comprises a porous support layer and a polyamide selective layer on its surface. The polyamide selective layer is covalently grafted with monoamine-terminated hyperbranched polyglycerol. The monoamine-terminated hyperbranched polyglycerol is grafted into the polyamide network through the reaction of its terminal primary amine groups with acyl chloride monomers during interfacial polymerization. This enriches the multi-hydroxyl branched structure of the hyperbranched polyglycerol on the membrane surface, forming a stable hydrophilic antifouling structure. The aforementioned long-lasting antifouling polyamide reverse osmosis membrane, its preparation method, and its applications result in a membrane with long-lasting and stable antifouling performance, strong hydrophilicity, and a simple preparation process, making it easy to industrialize.

The invention belongs to the technical field of electronic materials and devices, and discloses an all-fiber structure vertical organic electrochemical transistor and a preparation method thereof.The all-fiber structure vertical organic electrochemical transistor is composed of a lower electrode layer, a semiconductor active layer and an upper electrode layer, and the upper electrode layer and the lower electrode layer are ion permeable electrode layers; the porous PAN / PVP nanofiber membrane is composed of a porous PAN / PVP nanofiber substrate and a metal conductive layer, the semiconductor active layer is an electrospun PEDOT: PSS / PAm nanofiber membrane treated by DMSO (dimethylsulfoxide); the preparation method comprises the following steps: firstly, respectively preparing the ion permeable electrode layer and the semiconductor active layer, and then assembling the upper electrode layer, the semiconductor active layer and the lower electrode layer into the all-fiber structure vertical organic electrochemical transistor. The vertical organic electrochemical transistor with the all-fiber structure is more compact in structure, higher in channel utilization rate and shorter in ion transport path, and the signal amplification performance and the time response performance of a device are greatly improved.

This application provides a polymer brush, its preparation method, and its application in fluid drag reduction. The preparation method includes: preparation of an initiator layer; preparation of a PNIPAM brush: under a nitrogen atmosphere, N-isopropylacrylamide, pentamethyldiethylenetriamine, and acrylic acid are added to a mixed solvent of methanol and deionized water, and then cuprous bromide is added to obtain a polymerization reaction solution. A substrate material coated with an initiator layer is immersed in the polymerization reaction solution to perform a SI-ATRP reaction, and a PNIPAM brush is obtained on the surface of the substrate material. Preparation of a DM-PNIPAM brush: 4-dimethylaminobutamine and an activator are dissolved in N,N-dimethylformamide to obtain a modified solvent. The substrate material grafted with the PNIPAM brush is immersed in the modified solvent and reacted to obtain the polymer brush, i.e., the DM-PNIPAM brush. The polymer brush provided by this application improves its stability and durability as a drag-reducing agent in fluid drag reduction.

The application belongs to the field of membrane separation technology, and particularly relates to a novel high desalination rate anti-pollution reverse osmosis membrane material and a preparation method thereof. The preparation method comprises the following steps: contacting a porous support membrane with an aqueous solution containing mixed polyamine monomers and amine-modified nano-silicon dioxide, and then interfacially polymerizing with an oil phase solution containing mixed polyacyl chloride monomers to form a polyamide separation layer; then coating a sulfonated polyether sulfone coating solution to form a first modified layer; and finally coating a reaction solution containing modified polyethyleneimine, carboxylated graphene oxide and a crosslinking agent to form a second modified layer. By compounding aromatic and alicyclic polyamines, and combining amine-modified nano-silicon dioxide anchored in the polyamide network to form a dense separation layer, high desalination rate is ensured; by chemical bonding between the sulfonated polyether sulfone layer and the modified polyethyleneimine / carboxylated graphene oxide / crosslinking agent layer, a stable double-layer modified structure is constructed, and excellent anti-pollution performance is given to the membrane surface. The obtained membrane material has high desalination rate, strong anti-pollution property and stable structure.

The application belongs to the technical field of biomedical ceramic materials, and particularly relates to an inkjet 3D printing zirconia ceramic product with an intrinsic hydrophilic surface and a preparation method and application thereof. The preparation method of the inkjet 3D printing zirconia ceramic product provided by the application realizes extreme grain refinement of the zirconia ceramic, micro-strain introduction and generation of a trace amount of monoclinic phase by optimizing ink components, printing parameters and debinding and sintering processes, so that high surface energy and hydrophilic properties are obtained. The product exhibits excellent cell compatibility, immune regulation properties and soft and hard tissue integration ability without any subsequent surface modification treatment.

The application relates to the technical field of high polymer materials, and discloses a mixing rubber based on an industrial printing rubber roller and a preparation method thereof. The preparation steps are as follows: adding ethylene-propylene-diene rubber and methyl vinyl silicone rubber into a banbury mixer, mixing, adding a photoinitiator, modified filler, active agent and stearic acid, mixing, adding a softening agent, mixing, adding a crosslinking agent and an accelerator, mixing uniformly, thin passing on an open mill, and preparing the mixing rubber. The mixing rubber comprises the following raw materials in parts by mass: 90-100 parts of ethylene-propylene-diene rubber, 5-10 parts of methyl vinyl silicone rubber, 2-4 parts of a photoinitiator, 90-100 parts of modified filler, 10-12 parts of active agent, 2-5 parts of stearic acid, 20-25 parts of a softening agent, 5-8 parts of a crosslinking agent, and 3-4 parts of an accelerator.

This invention discloses a polishing slurry for 14nm CMP processes, its preparation method, and its application. The slurry's components have been optimized for 14nm CMP processes. It is formulated with abrasive particles, a nonionic copolymer dispersant, a pH buffer, an organic acid, a pH adjuster, a surfactant, a viscosity modifier, a corrosion inhibitor, an oxidant, a first additive, and a second additive. The nonionic copolymer dispersant is an EO / PO block copolymer. The first additive comprises 3-sulfopropyltetradecyl dimethyl betaine and 1-[N-(2-hydroxyethyl)-4'-piperidinyl]-3-(4'-piperidinyl)propane in a mass ratio of (5~10):1. This slurry offers advantages such as high polishing speed, high polishing uniformity, and few polishing defects in CMP processes. Furthermore, the polishing selectivity can be adjusted by regulating the proportions of each component in the slurry, making it suitable for polishing different types of substrates.

The invention belongs to the technical field of coatings, and particularly relates to a corrosion-resistant water-based coating and a preparation method thereof. The corrosion-resistant water-based paint is prepared from the following raw materials in parts by weight: 60 to 75 parts of water-based acrylic resin, 1 to 5 parts of filler, 1 to 5 parts of coalescing agent, 0.3 to 0.8 part of modified carbon nanotube, 0.3 to 0.5 part of defoaming agent, 0.1 to 0.3 part of wetting agent, 0.4 to 0.8 part of thickening agent and 25 to 35 parts of water. The coating has excellent impact resistance, wear resistance, ultraviolet aging resistance and corrosion resistance and relatively high adhesive force.