53results about How to "Improve interface adhesion" patented technology

The invention belongs to the technical field of fiber metal laminates, and particularly discloses an anti-shearing fiber metal laminate and a preparation method thereof. A stainless steel ultra-thin belt, carbon fiber woven cloth and one-way carbon fiber prepreg are laid according to a laying scheme of [W / [G / 0 / G / 90] 2 / Gc] s, modified epoxy resin is coated between every two layers in the laying process, and the anti-shearing fiber metal laminate is obtained after curing; wherein W represents the carbon fiber woven cloth, G represents the stainless steel ultra-thin strip, 0 represents the unidirectional carbon fiber prepreg laid at 0 degree, 90 represents the unidirectional carbon fiber prepreg laid at 90 degrees, Gc represents the central layer, s represents the symmetrical laying layers along the central layer, and 2 represents the repetition frequency of [G / 0 / G / 90]. According to the prepared anti-shearing fiber metal laminate, the anti-shearing performance of the fiber metal laminate is greatly improved, and the possibility of damage such as layering damage, matrix fracture, fiber fracture and metal plastic deformation is reduced.

The invention belongs to the technical field of CPVC pipe preparation, and provides a high-strength toughened CPVC pipe and a preparation method thereof. Firstly, butadiene and divinyl benzene are copolymerized to form a high-crosslinking structure, rigid support is provided, butyl methacrylate and acrylonitrile are copolymerized, flexibility and polarity are adjusted, interface bonding force is enhanced, and acrylic acid, epoxy acrylate and ethyl methacrylate are copolymerized to optimize compatibility with a matrix; secondly, through copolymerization of monomers such as 2-sulfonic acid ethyl methacrylate, polyethylene glycol methacrylate and dimethylacryloyloxyphosphonic acid, the polarity and flexibility of the compatilizer are adjusted, and the interface bonding strength of the compatilizer to a CPVC matrix and a modified elastomer is improved, so that the mechanical property of the composite material is remarkably improved; finally, nano SiO2 is subjected to surface modification through a silane coupling agent, so that the dispersity of the inorganic filler and the binding force with a matrix are improved, and the rigidity and the thermal stability of the composite material are enhanced.

The invention relates to the technical field of preparation of high-performance composite materials, and discloses a multilayer fabric laying method for improving interlayer bonding strength of a carbon fiber material, which comprises the following steps: step 1, selecting carbon nanotubes or graphene sheets as nanoparticles, carrying out chemical oxidation treatment to introduce functional groups, and carrying out functionalization treatment by using a silane coupling agent; step 2, mixing the functionalized nano particles with epoxy resin in a high-shear-force mixing device to form uniform nano reinforced resin; and 3, weaving the carbon fibers according to a predetermined three-dimensional structure mode by using a three-dimensional weaving machine, and monitoring the fiber tension and the weaving density in real time in the weaving process. By using nanoparticles to reinforce the composite material and carrying out chemical oxidation and coupling agent functionalization treatment, the interface adhesive force between the carbon fibers and the epoxy resin is improved, functional groups can form stronger chemical bonds with the resin, the interlaminar shear strength of the composite material is improved, and the overall structural integrity and durability of the material are enhanced.

The invention discloses a carbon fiber hard felt surface anti-oxidation coating and a preparation method thereof, and the carbon fiber hard felt with an excellent anti-oxidation coating on the surface is prepared by performing three times of coating curing and one time of high-temperature graphitization on a carbon fiber hard felt matrix. Compared with the prior art, the high thermal insulation performance and the excellent surface coating performance of the hard carbon fiber thermal insulation felt are guaranteed, meanwhile, the use frequency of a high-energy-consumption equipment graphitization furnace is reduced, the coating efficiency and the surface coating performance are improved, the whole product period is shortened, and the production cost is reduced.

The invention discloses a water-based intermediate coat composition with low-temperature stone impact resistance, water-based intermediate coat prepared from the water-based intermediate coat composition and application of the water-based intermediate coat composition. The water-based intermediate coat composition is prepared from the following components in parts by weight: 4 to 8 parts of water-based polyurethane dispersion A, 8 to 15 parts of water-based polyurethane dispersion B, 2 to 5 parts of methylated amino resin, 5 to 10 parts of mixed etherified amino resin and 0.2 to 0.4 part of phosphate adhesion promoter, wherein the hydroxyl value of the waterborne polyurethane dispersion A is lt; the acid value is 20-35 mgKOH / g, and the number-average molecular weight is gt; the particle size of the resin is 50-100nm, and the pH (Potential of Hydrogen) of the dispersion is 7.0-8.5; the hydroxyl value of the waterborne polyurethane dispersion B is 95-125 mgKOH / g, the particle size of the resin is 30-80 nm, and the pH value of the dispersion is 7.0-9.0.

The invention provides a foamed honeycomb core composite board and a preparation method thereof, and relates to the technical field of composite materials. The composite board comprises an upper skin, a first adhesive film layer, a foam honeycomb core, a second adhesive film layer, a deadening felt, a third adhesive film layer and a lower skin which are sequentially arranged. The preparation method of the foam honeycomb core comprises the following steps: putting a foamed phenolic resin mixed solution into a lower mold and an upper mold, putting a honeycomb core body into the lower mold, covering the upper mold on the honeycomb core body, carrying out foaming treatment, and removing the lower mold and the upper mold after foaming is finished, so as to obtain the foam honeycomb core. The lower mold and the upper mold are each provided with a protruding part matched with a honeycomb hole of the honeycomb core, and the peripheral face of each protruding part is attached to the inner wall of the honeycomb hole so that non-foaming areas can be formed at the upper end and the lower end of the honeycomb hole. And the first adhesive film layer and the second adhesive film layer respectively enter unfoamed areas at the upper end and the lower end of the honeycomb hole. The foaming honeycomb core and the adhesive film of the composite board have better bonding force, the mechanical property is excellent, and the flame-retardant effect is good.

The invention discloses a self-repairing composite material for a new energy vehicle tire, a preparation method of the self-repairing composite material and the tire. The self-repairing composite material is formed by connecting a first self-repairing layer and a second self-repairing layer. The first self-repairing layer is prepared from the following components in parts by weight: 80-120 parts of a dynamic vulcanized rubber system, 18-35 parts of a functional filler system and 3-8 parts of a vulcanization accelerator; the second self-repairing layer is prepared from the following components in parts by weight: 100 to 110 parts of thermoplastic polyurethane elastomer, 30 to 40 parts of repairing microcapsule and 10 to 15 parts of modified polyimide fiber; the repairing microcapsule is composed of a core material and a capsule wall, and the core material is an epoxy resin mixture or a curing agent mixture. By arranging the double-layer self-repairing composite material, the requirement for rapid repairing when the new energy vehicle tire is damaged under the complex road condition can be met, good durability is achieved, and the safety of a driver and passengers is effectively protected.

The invention discloses a high-strength and high-water-retention soybean meal-based adhesive and a preparation method thereof.The high-strength and high-water-retention soybean meal-based adhesive is prepared from, by weight, soybean protein meal, glucose oxidase, calcium sulfate oligomer, ethylene glycol diglycidyl ether and a dispersion medium, and the preparation method comprises the following steps that all the components are weighed according to the mass ratio; the preparation method comprises the following steps: dispersing glucose oxidase in a dispersion medium, uniformly dispersing soybean protein meal in the glucose oxidase dispersion liquid prepared in the step S1, heating for reaction, uniformly dispersing a calcium sulfate oligomer in the soybean protein meal dispersion liquid oxidized and catalyzed by the glucose oxidase prepared in the step S2, and uniformly dispersing the calcium sulfate oligomer in the soybean protein meal dispersion liquid oxidized and catalyzed by the glucose oxidase. And uniformly dispersing ethylene glycol diglycidyl ether in the dispersion liquid obtained in the step S3, and then stirring for 5 minutes. The adhesive disclosed by the invention has excellent properties in the aspects of bonding strength, water retention capacity, mildew resistance and sustainability.

The present invention relates to the technical field of chemical adhesives, and in particular to an adhesive for aramid paper and PI film composite materials and a preparation method thereof, wherein the adhesive comprises a component A and a component B; the component A is an organic solvent solution of a polymer hydroxy acrylic resin modified by a bisphenol A epoxy resin and a phosphate monomer, and the component B is a liquid anhydride curing agent; the weight ratio of the component A to the component B is (5-8):1. The rotational viscosity of the component A at 25°C is 500-2000 mPa.s, and the solid content is 50-70%; the rotational viscosity of the component B at 25°C is 50-500 mPa.s, and the solid content is 98-100%. The adhesive has good adhesion, and the aramid paper and PI film composite material prepared therefrom has good adhesion, high electrical stability, and excellent long-term high temperature resistance and oil resistance.

The invention relates to a high-heat-resistant glass fiber reinforced ABS material and a preparation method thereof, belonging to the technical field of polymer materials. The material comprises the following raw materials: 60-90 parts of ABS resin, 10-20 parts of modified glass fiber, 1-2 parts of lubricant, 1-3 parts of antioxidant and 0.05-0.1 parts of silane coupling agent. In the technical scheme of the invention, the surface of the glass fiber is grafted with KH550, then combined with graphene oxide, and then modified by triethylenetetramine-polyethylene glycol diglycidyl ether, and an intumescent flame retardant is grafted on the surface to obtain the modified glass fiber, which is finally mixed with ABS resin, lubricant, antioxidant and silane coupling agent, and extruded and granulated after melt blending to obtain the high-heat-resistant glass fiber reinforced ABS material. The modified glass fiber not only enhances the interface compatibility between the glass fiber and ABS, but also improves its mechanical properties, heat resistance and flame retardancy, and overall improves the comprehensive performance of the glass fiber reinforced ABS material.

The application belongs to the technical field of waterborne polyurethane preparation, and particularly relates to a solvent-free photocuring polyurethane and a preparation method thereof, which comprises the following steps: 1) mixing 1,6-hexane diisocyanate trimer, hydroxypropyl acrylate and a polymerization inhibitor at 55-65 DEG C, and obtaining a PUA prepolymer after reaction; 2) mixing the PUA prepolymer, epoxy acrylate resin, hydrogenated rosin glyceride, an active diluent mixture containing a photoinitiator, PETMP, a tertiary amine type co-initiator, a silane coupling agent and a polymerization inhibitor, stirring, defoaming, filtering, and obtaining the solvent-free photocuring polyurethane; the application has the advantages of fast curing speed and high storage stability.

The invention relates to the technical field of copper-based layered composite materials, in particular to a high-entropy copper-based layered composite material and a preparation method thereof. Different metal materials are subjected to layered compounding by adopting a stacking process, the metallurgical bonding force between adjacent metal layers at the interface bonding position of the obtained composite material is insufficient, and layering is easy to occur. In order to solve the problems, the invention provides the high-entropy copper-based layered composite material, the pure copper metal powder layer is firstly subjected to pre-pressing molding, then the high-entropy alloy powder layer is uniformly laid on the surface of the pre-pressed and molded pure copper metal powder layer, and metallurgical compounding is carried out, so that the obtained high-entropy copper-based layered composite material is better in mechanical property; the hardness is higher, and the interface metallurgical bonding force between the adjacent metal interface layers is better.

The present invention provides a flexural and tensile reinforced coarse aggregate ultra-high performance concrete and a preparation method thereof, comprising the following components: 300-800 parts of cement, 100-300 parts of fly ash, 100-300 parts of ceramic powder, 200-300 parts of silica ash, 500-800 parts of sand, 300-600 parts of crushed stone, 10-25 parts of polycarboxylic acid water reducer, and 150-200 parts of water; and also comprising MXene-carbon fiber composite material and steel fiber. The MXene-carbon fiber composite material is 0.2% to 2.0% of the total volume of concrete; and the steel fiber accounts for 0.5% to 2.0% of the total volume of concrete. The loading of MXene makes the carbon fiber more hydrophilic and rough, reduces the attachment of bubbles on the fiber surface and the generation of voids, and improves the compactness of the concrete; at the same time, MXene increases the bonding force, toughness and impact resistance of the carbon fiber / epoxy resin composite material; in addition, the conductive material MXene and the carbon fiber both increase the conductivity of the concrete. The present invention utilizes the mixed doping of carbon fiber composite materials and steel fibers to reduce the overall density of the fiber part and the dead weight of concrete, thereby obtaining a concrete product with enhanced toughening and chemical corrosion resistance.

This invention relates to the field of insulating materials for porous copper foil preparation, and particularly to an insulating material for porous copper foil preparation and its preparation method, as well as a method for preparing porous copper foil. The preparation method includes the following steps: perforating a cathode plate to obtain a cathode plate with multiple blind holes; filling the blind holes with an insulating material for porous copper foil preparation, and curing it to obtain a pretreated cathode plate; the raw materials for the insulating material are: resin, reactive diluent, thixotropic agent, leveling agent, polymerization inhibitor, and photoinitiator. The pretreated cathode plate is used as the cathode and placed in an electrolyte for electrodeposition to obtain porous copper foil. When preparing porous copper foil with the insulating material, the filling material in the blind holes can withstand more than 80 electroplating cycles without peeling off, indicating that the insulating material for porous copper foil preparation possesses excellent adhesion and electrolyte environment durability, enabling a single-filled cathode to support stable electrodeposition over an ultra-long period, significantly extending its effective service life.

The application provides a kind of chopped fiber reinforced flexible polymer thermal protection material by graphene oxide and aramid nanofiber hybrid modification and its preparation method and use, belongs to the field of advanced materials.Aiming at the problem that the modulus difference between fiber and flexible matrix is huge, the interface compatibility is poor, and the stress concentration is serious, by constructing the hybrid interface phase composed of graphene oxide and aramid nanofiber, the microstructure of the inert surface of the chopped fiber is improved, the multi-scale mechanical interlocking structure between the fiber and the flexible matrix is promoted, the modulus mismatch between the fiber and the rubber matrix is effectively relieved, and the uniform and efficient stress transfer in the interface area is realized.In the process of tensile deformation, dynamic load and high temperature ablation, the hybrid interface phase can keep the close interface bonding between the fiber and the flexible matrix, significantly improve the ablation and erosion resistance of the flexible composite material and the mechanical properties, especially the flexible ablation performance under high dynamic and deformation state, and has good application prospect.

The invention provides a self-adhesive polyether-ether-ketone-polyphenylene sulfone composite fiber and a preparation method thereof. The self-adhesive polyether-ether-ketone-polyphenylene sulfone composite fiber is of a skin-core structure, a core layer of the skin-core structure is polyether-ether-ketone, and a skin layer of the skin-core structure is polyphenylene sulfone. The self-adhesive polyether-ether-ketone-polyphenylene sulfone composite fiber disclosed by the invention is a composite fiber with a skin-core structure, and the self-adhesive polyether-ether-ketone-polyphenylene sulfone composite fiber has a self-adhesive property and an excellent mechanical property. The self-adhesive polyether-ether-ketone-polyphenylene sulfone composite fiber can be used for preparing an acoustic membrane, and due to the self-adhesiveness of the self-adhesive polyether-ether-ketone-polyphenylene sulfone composite fiber, when the self-adhesive polyether-ether-ketone-polyphenylene sulfone composite fiber is compounded with an aramid honeycomb, the acoustic membrane can be directly adhered to the aramid honeycomb to form a composite material, the interface adhesion effect is improved, and the interface bonding force is improved; the use of an adhesive is avoided, and the problem of hole blockage of the acoustic membrane caused by the adhesive is avoided.

The invention discloses a method for preparing high-strength engineering plastic from recycled PA66 plastic and application of the high-strength engineering plastic, and relates to the technical field of chemical engineering. The method at least comprises the following steps: warehousing and homogenizing the recycled PA66 plastic; crushing the homogenized PA66 plastic, uniformly premixing the crushed PA66 plastic with a chain extender and an antioxidant, and performing a first extrusion process to obtain rPA66; putting part of the rPA66, the antioxidant, the lubricant, the compatibilizer, the black sand and the light stabilizer into a high-speed mixer, and uniformly mixing to obtain a premix; and performing a second extrusion process on the premix, the modified carbon fiber and the remaining rPA66 to obtain the high-strength engineering plastic prepared from the recycled PA66 plastic, wherein the modified carbon fiber is obtained by modifying a silane coupling agent, carbon nanotubes and polyvinyl alcohol. The high-strength engineering plastic with excellent mechanical properties is obtained by modifying the carbon fibers through the grafted silanized carbon nanotubes and the polyvinyl alcohol to serve as a reinforcing agent for recycling the PA66 and cooperating with an optimized side feeding and fiber adding process.

The application discloses a passivator for treating the surface of aluminum foil resistant to heat and humidity, a preparation method and application. The passivator is suitable for the surface treatment of aluminum foil of aluminum-plastic film for lithium ion battery soft packaging and general soft packaging of food, medicine, daily chemicals and the like. The passivator contains: a trivalent chromium compound (A), a fluorine-containing compound (B) and an epoxy-modified alkyd resin (C). The content of the trivalent chromium compound (A) is 5-60% based on the total mass of the passivator solid, the content of the fluorine-containing compound (B) is 0.01-20%, and the content of the epoxy-modified alkyd resin (C) is preferably 30-90%. The application can form a dense, strongly adhesive passivation film with excellent heat resistance and chemical resistance on the surface of the aluminum foil. The passivation film can meet the affinity requirement of the adhesive for the dry process and can resist the high-temperature compounding condition of the hot process, realizes the general use of the passivator in the dry process and the hot process, and greatly improves the production efficiency and process flexibility.

The invention relates to the technical field of functional leather materials, in particular to electrical functional leather as well as a preparation method and application thereof. The leather with the electrical function comprises a leather base material, the bottom coating layer is formed on at least one surface of the leather base material; the functional layer is formed on the bottom coating layer and comprises a hybrid conductive network formed by mutually combining a conductive polymer and an inorganic nano material; and the protective layer is formed on the surface of the functional layer. According to the electrical functional leather, on the premise that a small amount of inorganic nano materials are added and the inherent performance of the leather is not affected, a stable, efficient and patterned conductive network is constructed, the leather is endowed with excellent electrical performance, and the application range of the leather in the fields of intelligent wearing, electromagnetic protection and the like is widened.

The present application belongs to the technical field of perovskite optoelectronic devices, and discloses a high-stability spiro‑OMeTA D hole transport layer and a perovskite solar cell containing the hole transport layer and a preparation method thereof. The preparation method of the high-stability spiro‑OMeTAD hole transport layer comprises: S1, dissolving spiro‑OMeTAD in a solvent to obtain a spiro‑OMeTAD solution; mixing a hydrogen bond donor and LiTFSI evenly, heating, and obtaining a supramolecular deep eutectic solvent; S2, adding the spiro‑OMeTAD solution to the supramolecular deep eutectic solvent, heating, and obtaining a precursor solution; S3, coating the precursor solution on the surface of a substrate to obtain a high-stability spiro‑OMeTAD hole transport layer. The hole transport layer of the present application avoids the corrosion of the perovskite film by the acetonitrile solvent and the generation of holes in the spiro‑OMeTAD hole transport layer due to the volatilization of tBP at high temperature, and effectively inhibits the Li + By introducing a polymer network into spiro‑OMeTAD, the tensile and fracture resistance of the hole transport layer and its interfacial adhesion with the perovskite light-absorbing layer are improved, thereby improving the stability of the hole transport layer.

This invention relates to the field of printing coating preparation technology, and discloses a printable gold coating composition based on resin gold salt. The preparation method includes the following steps: turpentine oil and sulfur powder are stirred and mixed, refluxed at 110-130℃ for 2-4 hours, and after the reaction, the mixture is cooled and filtered to obtain sulfurized balsam, which is stored in the dark for later use; the sulfurized balsam is reacted with chloroauric acid solution to prepare sulfurized balsam gold; a composite resin acid salt additive and a portion of the solvent are ultrasonically premixed, and then the sulfurized balsam gold, a high-molecular organic carrier, and the remaining solvent are added sequentially, stirred, and degassed and aged using a planetary gravity mixer to obtain a printable gold coating composition based on resin gold salt. The obtained gold coating composition possesses good printability, conductivity, surface smoothness, and decorative properties, and is suitable for various coating methods such as screen printing and pad printing, forming a thin and continuous conductive gold film, meeting the industrial preparation requirements of ceramic-based sensor electrodes.

The utility model relates to the field of buildings, in particular to a multifunctional heat shielding coating structure. Comprising a base layer, an anti-crack coarse mortar layer, a first primer layer, an aerogel heat insulation floating coat, an aerogel primer layer and a heat reflection heat insulation coating layer which are sequentially arranged from inside to outside. The utility model provides a multifunctional heat shielding coating structure which can reduce the cracking and falling risks of a coating and improve the heat insulation performance.

The invention belongs to the field of membrane separation, and particularly relates to a polymer membrane for an azeotropic mixture and a preparation method of the polymer membrane. Preparing porous nano silica sol; fully infiltrating the porous nano-silica sol and a cross-linking agent into the separation layer, and cross-linking to obtain the porous nano-silica gel. The method can be used for separating the azeotropic mixture of the methanol and the hydrophobic organic matter with the kinetic diameter larger than that of the methanol, and has a specific adsorption tendency to formaldehyde.

This resin composition comprises a propylene-based polymer (A), cellulose fibers (B) and a maleic-anhydride-modified polyolefin wax (C), in which the components (A), (B) and (C) are contained in amounts of 50 to 99.8 parts by mass, 0.1 to 50 parts by mass and 0.1 to 30 parts by mass, respectively, when the total amount of the components (A), (B) and (C) is 100 parts by mass. A polyolefin wax constituting the component (C) comprises an ethylene homopolymer, a copolymer of ethylene and an α-olefin having 3 to 12 carbon atoms, a propylene homopolymer, or a copolymer of propylene and ethylene or an α-olefin having 4 to 12 carbon atoms, and the component (C) satisfies the following requirements: (i) Mn is 300 to 20000; (ii) the softening point is 70 to 160°C; (iii) the density is 830 to 1000 kg / m3; and (iv) the acid value is 30 to 200 mgKOH / g.

The invention provides slurry for a silicon-based negative electrode based on polyimide containing amido bonds and application of the slurry. The slurry for the silicon-based negative electrode comprises a negative electrode active material and a binding material, the negative electrode active material comprises a silicon-containing active material, the binding material comprises polyimide and / or a precursor thereof, and the precursor is polyamide acid; wherein the polyamide acid is prepared from a diamine monomer and a dianhydride monomer through a condensation polymerization reaction; the polyimide is prepared by carrying out imidization on polyamide acid; wherein the diamine monomer comprises an amido bond-containing diamine monomer, and the dianhydride monomer comprises an aromatic tetracarboxylic dianhydride monomer. According to the invention, an amido bond-containing structure is introduced into a polyimide main chain, and a functionalized polyimide binder with multiple hydrogen-bond interaction and moderate electrolyte compatibility is constructed, so that the interface adhesion between the binder and a silicon active material is enhanced, and the swelling of the binder in an electrolyte is inhibited.

The invention relates to the field of glass, and particularly discloses a substrate and TGV through hole glass suitable for the field of semiconductor packaging and a preparation method of the TGV through hole glass. The glass is prepared from the following components: 52 to 73 percent of S < iO >, Al < 2 > O < 3 >, B < 2 > O < 3 >, MgO, Sr < O >, CaO, BaO, ZrO2 and Fe < 2 > O < 3 >. According to the glass, a glass matrix obtained through a float glass forming process is subjected to annealing and chemical strengthening, high-alumina-silica matrix glass is obtained, and then surface plasma treatment and modified silicon carbide fiber treatment are performed, so that the adhesive high-alumina-silica glass is obtained. The glass has excellent dielectric constant and expansion coefficient, keeps extremely strong light transmission on the premise of strong interface adhesion, can be used as a substrate for packaging a large-size wafer / panel, can be further plated with copper in a glass through hole technology, can improve the stability of a metal copper plating layer, and has a wide application prospect.

The application discloses a printed circuit board and a manufacturing method thereof and an electronic product, and relates to the technical field of printed circuit boards. The manufacturing method of the printed circuit board comprises the following steps: providing a printed circuit board substrate, wherein the printed circuit board substrate comprises a solder mask layer; coating water-based paint on at least one side surface of the printed circuit board substrate, and forming a paint coating layer after leveling and drying, wherein the water-based paint comprises water-based polyacrylic paint. The technical scheme of the application can realize the unity of the functionality and the decoration of the printed circuit board, and the stability of the overall structure of the PCB is good.

The application belongs to the field of advanced functional materials, and particularly relates to a curable polyimide composition, a polyimide adhesive film and a preparation method and use. The polyimide adhesive film is composed of polyimide adhesive containing unsaturated double bonds which can be crosslinked by microwave and is compounded on the surface of a polyimide film treated by ozone or supercritical CO2. The curing degree of the polyimide adhesive film can reach more than 99% under the treatment of 250-400W microwave power for 2-3 min, and the adhesive film can form extremely high adhesion between glass or copper foil. The polyimide adhesive film has the characteristics of easy curing, no volatilization, low shrinkage, high adhesion, etc., and has a wide application prospect in the fields of semiconductor packaging, flexible copper-clad plate, etc.

The invention relates to the technical field of curing adhesives, and discloses a UV curing adhesive for an FPC and a preparation method of the UV curing adhesive. Comprising the following operation steps: mixing aliphatic polyurethane acrylate, a reactive diluent and a defoaming agent, heating to 50-60 DEG C, stirring for 1-2 hours, adding modified polyurethane acrylate, a photoinitiator and an antioxidant, uniformly mixing, and filtering to obtain the UV curing adhesive. Aliphatic polyurethane acrylate is used as a base material; the flexible adhesive has good flexibility and curing speed, but is high in shrinkage rate; in the scheme, trimethylolpropane triacrylate and siloxane ethylene glycol epoxy acrylate are taken as reactive diluents, so that the curing shrinkage rate and the thermal stability are reduced; and modified polyurethane acrylate with Schiff base is introduced to synergistically further improve the thermal stability of the UV curing adhesive.

The invention relates to high-strength compression-resistant green recycled concrete and a preparation method thereof, and relates to the technical field of concrete. The high-strength compression-resistant green recycled concrete is prepared from the following raw materials in parts by mass: 240 to 280 parts of cement, 80 to 100 parts of fly ash, 35 to 40 parts of slag, 640 to 680 parts of recycled coarse aggregate, 410 to 450 parts of fine aggregate, 44 to 52 parts of reinforcing agent, 7 to 9 parts of polycarboxylate superplasticizer and 200 to 240 parts of water. The reinforcing agent comprises water glass; the effect of improving the mechanical property of the concrete is achieved.