13results about How to "Enhanced Interfacial Interaction" patented technology

This invention relates to the field of polymer materials technology, specifically to a method for preparing and applying a rigid polyimide foam reinforced with aluminum honeycomb. The method for preparing the rigid polyimide foam reinforced with aluminum honeycomb provided by this invention includes steps such as surface pretreatment of the aluminum honeycomb core material and fixing the pretreated aluminum honeycomb core material into a molding die. The rigid polyimide foam material reinforced with aluminum honeycomb obtained by this invention not only possesses high specific strength and high specific stiffness, but also inherits the excellent properties of polyimide foam such as high temperature resistance, flame retardancy, low smoke, and thermal insulation. The introduction of the aluminum honeycomb skeleton also improves the material's impact resistance and dimensional stability, making it an ideal multifunctional integrated lightweight structural material with promising application prospects.

This application discloses a heat-insulating and high-temperature resistant PPR composite pipe and its preparation method. The PPR composite pipe includes an inner layer, a middle layer, and an outer layer. The inner layer, by weight, includes the following components: 80-90 parts of PP-RCT, 1-3 parts of boron-nitrogen co-doped graphene aerogel, 0.5-1.5 parts of antioxidant, 3-8 parts of boron nitride, 1-3 parts of polyphthalamide, and 0.5-2 parts of dispersant. The middle layer includes PP-RCT, chopped glass fiber, maleic anhydride-grafted polypropylene, and ethylene-vinyl alcohol copolymer. The outer layer includes PP-RCT and an ultraviolet absorber. This PPR composite pipe has excellent heat insulation and high-temperature resistance properties.

The invention relates to the technical field of cables, and discloses a high-thermal-conductivity creep-resistant corrosion-resistant composite reinforced core aluminum stranded wire and a preparation method thereof.The high-thermal-conductivity creep-resistant corrosion-resistant composite reinforced core aluminum stranded wire comprises a composite reinforced core and at least one aluminum stranded layer or aluminum alloy stranded layer concentrically stranded outside the composite reinforced core; the composite reinforced core comprises a surface modified carbon fiber reinforced body and a metal matrix; the surface modified carbon fiber reinforcement comprises a carbon fiber reinforcement and a gradient metal transition layer deposited on the surface of the carbon fiber reinforcement; the gradient metal transition layer comprises a bonding layer deposited on the surface of the carbon fiber reinforcement and a main transition layer deposited on the bonding layer; according to the invention, the composite reinforced core is formed by taking the carbon fiber as the reinforcement and the metal as the matrix to replace the traditional steel core, and the gradient metal transition layer is constructed on the surface of the carbon fiber reinforcement, so that the interface reinforcement and function integration are realized, and the mechanical, heat-conducting, creep-resistant and corrosion-resistant performances of the wire are comprehensively improved.

The application relates to the technical field of heat-conducting composite materials, and discloses a heat-conducting flexible composite phase change material as well as a preparation method and application thereof. The method comprises the following steps: modifying a thermoplastic elastomer by grafting maleic anhydride as a grafting agent; modifying a heat-conducting filler by surface hydroxylation with a strong base as a surface modifier; melt blending the grafted thermoplastic elastomer with a phase change material, and adding the surface-modified heat-conducting filler to crosslink, so as to obtain the heat-conducting flexible composite phase change material. By regulating and controlling the micro-interface structure of the filler-matrix, the interface interaction between the filler and the matrix is enhanced, the heat-conducting-support integrated structure is constructed, the interaction between the filler and the matrix is improved, the dispersion of the filler in the matrix is improved, the interface phonon scattering is reduced, the heat-conducting flexible composite phase change material has good heat-conducting performance, and meanwhile, the heat-conducting flexible composite phase change material also has strong mechanical performance and high energy storage density.

The application discloses a supported metal element synergistically modified copper-based catalyst and a preparation method and application thereof. The catalyst is composed of metal copper, metal gallium, an auxiliary element M and a carrier SiO2. In the preparation method, a Cu-Ga catalyst precursor is prepared through an ammonia evaporation method, and then the auxiliary element is added through ball milling. Mechanical shearing force and impact generated in the milling process can promote sufficient contact and uniform mixing of the auxiliary element and the precursor, so that the auxiliary element is more uniformly distributed and a strong interaction is formed. Under the condition that the hydrogen ester ratio is about 200, the application can still maintain a high methyl 3-hydroxypropionate conversion rate and 1,3-propanediol selectivity.

The present application relates to a kind of single-component intumescent flame retardant with layered structure and super strong carbon formation ability and its preparation method, the method of the present application first 3,4-dihydroxybenzaldehyde and organic diamine rich in benzene ring or nitrogen heterocycle are reacted to prepare intermediate product, then intermediate product and phytic acid are organically combined, by esterification crosslinking reaction, construct macromolecular crosslinking network, prepare the single-component intumescent flame retardant with layered structure and super strong carbon formation ability finally.Compared with general ammonium phytate flame retardant, the flame retardant prepared in the present application has wash resistance, and can form super strong intumescent dense and hard carbon layer when burning.Polymer materials can be simultaneously endowed with excellent flame retardant properties and flame-retardant durability.In addition, since the flame retardant of the present application has layered structure, it can be more uniformly dispersed in polymer, and can significantly improve the mechanical properties of polymer.The preparation process of the flame retardant of the present application is simple, practical, and has very broad application prospect.

The invention discloses a preparation method of a modified wheat straw composite board based on ZnCl2, and belongs to the technical field of board manufacturing, and the preparation method comprises the following steps: S1, chopping wheat straw, adding the chopped wheat straw into 0.5 mol / L hydrochloric acid, carrying out acid treatment, adjusting the pH value to be neutral by using deionized water after the treatment is completed, and carrying out suction filtration treatment to obtain a neutral filter material; s2, mixing the neutral filter material with the mixed solution, then adding NaClO powder for mixing, and then adjusting the pH value of the mixed solution to 10 through a NaOH solution to obtain TEMPO oxidized pulp fibers; s3, TEMPO oxidized pulp fibers are subjected to ethanol water cleaning treatment and then dispersed in a ZnCl2 solution to be evenly mixed, suction filtration treatment is conducted, a filter cake B is obtained, S4, the filter cake B, chitin and acetic acid are evenly mixed according to the mass ratio of 3: 4: 1 and then subjected to suction filtration treatment, a hot-pressing filter material is obtained, and S3, the hot-pressing filter material is put into a hot-pressing mold and subjected to hot pressing through a hot press to obtain the composite board. According to the invention, the preparation of the formaldehyde-free and full-biomass-source high-performance board is realized.

The present application relates to the technical field of mesoporous materials, and particularly to an interface pore rich-hydroxyl silica with monodispersity and uniform size, and a preparation and application thereof. The present application provides a preparation method of the interface pore rich-hydroxyl silica with monodispersity and uniform size. The preparation process is to perform a reaction in a water-oil two-phase system. The oil phase is an easily volatile non-water-soluble organic solvent such as n-hexane. Caprylic triglyceride is added to the oil phase. A non-surfactant pore-forming scheme is adopted. N-octanol and propyl silicate are used as auxiliary pore-forming agents. Sodium silicate is used as a silicon source. Ethyl acetate is used as a catalyst. The synthesis reaction is performed under the condition that the heating temperature is 25-45 DEG C. The prepared silica presents a spherical structure, has uniform particle size, high dispersity, controllable diameter, an open pore structure on the surface and rich silicon hydroxyl, and exhibits good biological safety. The interface pore rich-hydroxyl silica has a great application prospect in the fields of biomaterials, medical adjuvants, food, daily chemicals, cosmetics, electronics and the like.

The invention discloses a porous iron-based material and application of the porous iron-based material coupled with microorganisms in wastewater treatment, and belongs to the technical field of wastewater treatment. The porous iron-based material is obtained by mixing composite carbon nitride with a carbon source and an iron source and then performing high-temperature reduction, the composite carbon nitride is prepared by taking melamine, ammonium phosphate and thiourea as precursors through a thermal polymerization method; the carbon source comprises tannic acid, glucose and chitosan; the iron source comprises ferric chloride hexahydrate; the prepared porous iron-based material is good in stability, and when the porous iron-based material is placed in a bioreactor inoculated with activated sludge, efficient degradation of antibiotics in wastewater can be effectively achieved.

This invention discloses a high thermal conductivity and electromagnetic shielding polyimide coating and its preparation method, belonging to the field of polyimide coating technology. The coating comprises the following raw materials in parts by weight: 32 parts of diamine monomer, 33 parts of dianhydride monomer, 582 parts of organic solvent, and 3.4-11.5 parts of nitrogen-doped helical carbon nanotube-supported carbon nanofibers. The preparation method includes the following steps: ultrasonically dispersing nitrogen-doped helical carbon nanotube-supported carbon nanofibers in an organic solvent; then, under nitrogen protection and an ice-water bath condition, dissolving the diamine monomer in the dispersion; and then adding the dianhydride monomer to carry out a polycondensation reaction to obtain a high thermal conductivity and electromagnetic shielding polyimide coating. This invention, through an integrated design of "composition-structure-interface," constructs an efficient and stable three-dimensional multifunctional network within the polyimide matrix, achieving a synergistic improvement in the coating's electromagnetic shielding and thermal conductivity performance, providing an ideal material solution for the field of high-end electronic packaging and protection.

The invention relates to the technical field of cable ties, in particular to a high-strength cable tie and a preparation method thereof. The high-strength cable tie is prepared from the following components in parts by weight: 70 to 85 parts of nylon 66, 12 to 25 parts of rigid-flexible dual-phase nano composite reinforcement, 3 to 8 parts of two-dimensional lamellar nano filler, 0.1 to 0.5 part of nucleating agent, 0.5 to 1.5 parts of lubricating agent, 0.2 to 0.6 part of heat stabilizer and 0.1 to 0.3 part of antioxidant. According to the high-strength cable tie provided by the invention, the strength, heat resistance, fracture toughness and long-term mechanical retentivity of a material are improved, the toughness of the material is improved, and the problems that the material is fractured due to overlarge local stress and the performance is reduced due to interface debonding are prevented.

The invention relates to the technical field of reinforcing and toughening of high polymer materials, and particularly discloses a high polymer grafted surface thorn-type mesoporous silica nano composite particle as well as a preparation method and application of the high polymer grafted surface thorn-type mesoporous silica nano composite particle. The nano composite particle is specifically characterized in that an inner core is a silicon dioxide nano particle with a center diverging mesoporous structure and a spiny surface; the outer layer is a polymer grafted on the surface of the inorganic core; mesoporous silicon dioxide nanoparticles with spikes on the surface, an amino silane coupling agent, a polymerization initiator and a polymerization monomer are used as raw materials, and the particle size of inorganic core particles and the grafting length of outer-layer macromolecules can be regulated and controlled in the synthesis process. The nano composite particles with the structure are used as polymer filler, the light transmission performance is similar to that of pure macromolecules, and the mechanical property is superior to that of pure inorganic nano particles; compared with traditional nanoparticles grafted with macromolecules, the light transmittance, rigidity and obdurability are comprehensively improved. The nano composite particle can keep excellent light transmission while effectively strengthening and toughening a high-light-transmission polymer matrix.

The invention relates to a surface-modified carbon nano tube and a preparation method thereof. The surface-modified carbon nano tube comprises a carbon nano tube and an oxygen-containing functional group bonded on the carbon nano tube, the molar content of the oxygen element in the surface-modified carbon nanotube is 2-8%, and in the Raman spectrum of the surface-modified carbon nanotube, the intensity ratio of a G peak to a D peak is 20-80. The surface-modified carbon nanotube provided by the invention is good in hydrophilicity, easy to disperse and excellent in structural integrity, and is beneficial to maintaining high conductivity and improving the cycle performance of a battery.