38results about How to "Strong interface interaction" patented technology

The invention discloses a flexible high-strength MXene-based electromagnetic shielding composite film, which comprises a conductive layer Ti3C2Tx MXene/silver nanowire and a polymer enhancement layeraramid nanofiber, and is characterized in that the mass fraction of the Ti3C2Tx MXene/silver nanowire conductive layer is 10-80%; the mass ratio of the Ti3C2Tx MXene to silver nanowire is (10: 0.5)-(10: 1.5). The invention further discloses a preparation method of the flexible high-strength MXene-based electromagnetic shielding composite film. The composite film prepared by the invention has excellent flexibility and mechanical properties, good conductivity and broadband high electromagnetic shielding effectiveness, and can meet the application in the fields of aerospace, military engineering,artificial intelligence and flexible wearable electronic equipment.

The invention relates to a transparent hydrophobic wear-resistant coating and a preparation method thereof. The transparent hydrophobic wear-resistant coating comprises an epoxy resin layer and a low-surface-energy fluorine-containing layer which are arranged in sequence from top to bottom. The preparation method comprises the following steps: (1) blending epoxy resin and a curing agent into an organic solvent, carrying out ultrasonic treatment to obtain a coating solution, wherein the total content of the epoxy resin and the curing agent is 0.001-5wt%; adopting a dip-coating method for a substrate material, uniformly adhering the coating solution to the surface of the substrate material, and taking out and curing to obtain the epoxy resin layer; and (2) preparing the low-surface-energy fluorine-containing layer, namely coating the epoxy resin layer with the fluorine-containing solution, and drying to obtain the transparent hydrophobic wear-resistant coating. The transparent hydrophobic wear-resistant coating is equivalent to glass in transparency, the surface contact angle is 102 degrees or above, the hydrophobicity of the coating is controllable, and the transparent hydrophobic wear-resistant coating has excellent mechanical strength and bonding property and is convenient for large-scale industrial production.

The invention provides a high-strength high-thermal-conductivity nylon composite material and a preparation method thereof. The nylon composite material is prepared from the following raw materials in parts by weight: 100 parts of nylon resin, 5-30 parts of carbon fibers, 10-30 parts of thermal conductive filler, 0.1-5 parts of a dispersing agent and 0.1-5 parts of an antioxidant, the nylon resin is composed of 5-30% of graphene nylon master batch and 70-95% of pure nylon resin; and carbon nanotubes are grafted on the surfaces of the carbon fibers. According to the invention, high-thermal-conductivity fillers such as graphene and carbon nanotubes are pretreated and then subjected to melt blending, so that the fillers are well dispersed and a thermal conduction path can be constructed at a low content, the thermal conductivity of the composite material is remarkably improved, and the carbon fibers are added into the matrix, so that the overall mechanical property of the material is improved, the dimensional stability is improved, and the water absorption rate of the nylon is reduced.

The invention discloses an LED-lamp forsterite-nylon heat-conduction composite material. The LED-lamp forsterite-nylon heat-conduction composite material is prepared from, by weight, 200 parts of nylon6, 40-50 parts of nylon66, 20-30 parts of forsterite, 20-30 parts of carbon fibers, 50-60 parts of acetone, 80-100 parts of nitric acid of 60% to 70%, 3-4 parts of tetraethyl orthosilicate, 3-4 parts of maleic anhydride, 15-20 parts of toluene-2,4-diisocyanate, 20-25 parts of (methyl) hydroxy propyl acrylate, 0.4-1 part of catalyst, 0.4-2 parts of polymerization inhibitor, 3-5 parts of sodium lignin sulfonate, 3-4 parts of potassium hydrogen tartrate, 150-170 parts of tetrahydrofuran, 80-100 parts of methylbenzene and a proper amount of deionized water. The nylon heat-conduction composite material is compact in structure, fast in heat transmission and heat dissipation, good in mechanical performance and durable in use, high-strength LED lamps can be effectively protected, and the service life of the lamps can be prolonged.

The invention discloses a multifunctional durable thin film with a hierarchical structure and a preparation method, the multifunctional durable thin film comprises a bionic lotus leaf super-hydrophobic layer polydimethylsiloxane/silicon dioxide (PDMS/SiO2), a conductive layer MXene and an enhancement layer nano aramid fiber, the thickness of the hydrophobic layer is 3-10 [mu] m, the thickness of the conductive layer is 3-50 [mu] m, the thickness of the enhancement layer is 10-50 [mu] m, and the thickness of the enhancement layer is 10-50 [mu] m. All the functional layers are firmly connected through hydrogen bond interaction, and meanwhile the coupling enhancement effect is achieved through the performance of the functional layers. Multi-level structural design is achieved through vacuum filtration, hot press molding and spraying curing processes, and the prepared composite film has good flexibility and mechanical strength, efficient electromagnetic shielding performance, excellent super-hydrophobic self-cleaning performance and excellent weather resistance and high-temperature resistance; the method is suitable for application in the fields of military, electronic equipment and aerospace in severe environments.

The invention discloses a wood modifier and a preparation method thereof, and relates to the technical field of wood chemical modification. The wood modifier disclosed by the invention is prepared from the following raw materials in parts by weight: 5-10 parts of a triazole compound, 10-20 parts of hydroxyethyl methacrylate, 0.5-0.8 part of a catalyst, 10-20 parts of ammonium dihydrogen phosphate,20-40 parts of a nonionic surfactant, 45-90 parts of polyethylene glycol and 300-800 parts of water. The invention further discloses a preparation method of the wood modifier. The wood modifier provided by the invention can stabilize the size of wood treated by the modifier, has excellent hardness, bending strength, impact toughness and loss resistance, also has waterproofness and flame retardance, and prolongs the service life of the modified wood. The raw materials of the modifier are non-toxic and environment-friendly and are pollution-free to human bodies and the environment, and the application range of modified wood is widened.

The invention discloses a sound insulation and noise reduction composite waved plate tile which is of a two-layer composite structure and comprises a PC layer and a sound absorption layer. The PC layer is prepared from the following raw materials in parts by weight: 60 to 70 parts of PC resin, 15 to 20 parts of polyacrylonitrile-butadiene-styrene copolymer, 0.8 to 1 part of an ultraviolet light absorber, 2 to 3 parts of a composite filler and 0.5 to 0.7 part of a compound flame retardant; thesound absorption layer is made of a polyurethane rigid foam material blended with modified expanded graphite; the invention further discloses a production process of the sound insulation and noise reduction composite waved plate tile. According to the sound insulation and noise reduction composite waved plate tile, the PC layer is prepared by takingPC resin as a polymer matrix, ABS copolymer is adopted for blending modification, the compound flame retardant and the composite filler are used as auxiliary materials, and the PC layer has good heat insulation, mechanical and sound insulation properties; the sound absorption layer has excellent sound-absorbing and sound-insulating effects and flame-retardant performance; the obtained sound insulation and noise reduction composite waved plate tile has good sound insulation, noise reduction and flame retardant properties, and is a high-performanceroof material product.

The invention provides an FPGA development module based traffic signal control demonstration box. The demonstration box has an embedded signal machine system. The signal machine system is adopted by adopting an ARM, so that external software interfaces can be simplified. The compiling environment is an embedded Linux system established based on the ARM. Interfaces of an FPGA end are controlled through bottom layer drive. Chip transfer is realized through external serial-parallel connection and transfer connection to signal lights, a detector and a digital tube interface is achieved. Different timing demands can be met through programming by a user. The invention is not only a demonstration tool of a signal machine. Besides, hardware complexity is reduced greatly and power consumption is reduced, so that cost is saved.

The invention provides a titanium dioxide-polyamide thermal conductive composite material for LED lamps. The composite material is prepared from, by weight, 6-200 parts of polyamide, 40-50 parts of polyamide 66, 20-30 parts of rutile type titanium dioxide, 20-30 parts of carbon fibers, 50-60 parts of acetone, 80-100 parts of 60%-70% nitric acid, 3-4 parts of nonylphenol polyoxyethylene ether, 3-4 parts of lauric acid, 15-20 parts of methylbenzene-2,4-diisocyanate, 20-25 parts of 2-hydroxypropyl methacrylate, 0.4-1 part of catalyst, 0.4-2 parts of polymerization inhibitor, 3-5 parts of ethoxyquin, 3-4 parts of disodium stannous citrate, 150-170 parts of tetrahydrofuran, 80-100 parts of methylbenzene and an appropriate amount of deionized water. The polyamide thermal conductive composite material is compact in structure, rapid in heat transfer and heat dissipation, good in mechanical property, durable in use and capable of effectively protecting high-strength LED lamps and greatly prolonging the service life of the lamps.