5results 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 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 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.

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.