8 results about "Carbon layer" patented technology

The invention discloses a bismaleimide resin/silicone rubber ablation-resistant thermal insulation composite material and a preparation method thereof. The composite material is prepared from the following components in parts by mass: 20-80 parts of methylvinylsilicone rubber, 20-80 parts of methyl vinyl phenyl polysiloxane rubber, 1-5 parts of dicumyl peroxide, 15-40 parts of white carbon black, 5-15 parts of chopped fibers, 5-40 parts of bismaleimide, 1-5 parts of hydroxyl silicone oil and 1-20 parts of zirconium boride. The bismaleimide resin/silicone rubber ablation-resistant thermal insulation composite material has high vulcanization molding quality, and a dense hard carbon layer can be formed on the surface of an ablation layer of the thermal insulation composite material in the ablation process to play a role of preventing the thermal insulation composite material from further ablation, thereby improving the ablation resistance and antioxygenic property of the thermal insulation composite material, enabling the thermal insulation composite material to meet the requirements of operating environments with oxygen enrichment, high temperature, high-speed gas flow and particle erosion, and solving the problem that the thermal insulation material is easy to flaw and be burnt out under the working environments with high temperature, high pressure, oxygen enrichment and particle erosion.

The invention discloses a preparation method of In2O3 hollow nanospheres coated by a nitrogen and sulfur doped carbon layer. The preparation method comprises the following steps: with spherical In(OH)(2,5-PDC) with uniform size and morphology as a precursor, setting proper calcining temperature, calcining time and calcining atmosphere to form indium oxide hollow nanospheres, which are uniform insize and uniformly coated with N and S element doped carbon layers. The N and S elements in the precursor In(OH) (2,5-PDC) hollow sphere are introduced by adding a nitrogen-rich organic ligand (2,5-pyridine dicarboxylic acid) and a nitrogen and sulfur-rich regulator (2,1,3-benzoisothiazole-3-ketone), and the N and S element doped C-coated In2O3 hollow nanosphere is obtained after heat treatment. According to the preparation method disclosed by the invention, the In(OH) (2,5-PDC) hollow sphere with uniform size and morphology is synthesized through a one-step simple solvothermal reaction.

The invention discloses a preparation method for solar blind type deep ultraviolet plasma resonance nanoparticles. A laser liquid phase ablation device is adopted. A laser liquid phase ablation methodis used for preparing metal nanoparticles with a local area surface plasma resonance effect; the preparation method is simple; and a reaction product is pure, so that impurities are not easily introduced. Ascorbic acid is introduced as a carbon source, so that the metal nanoparticles can be wrapped with a carbon layer with a certain thickness, and the stability and oxidation resistance of the product can be effectively improved. The experimental controllability is high. By adjusting laser energy and ablation time, the particle size and the oxidation degree of the metal nanoparticles can be regulated and controlled. The prepared metal nanoparticles can be used for enhancing the light absorption of light (240-260nm) in the extremely deep ultraviolet waveband.

Stable maintenance of high separation performance of a separation membrane having a separation layer comprising a compact carbon layer is described in addition to a separation membrane having a separation layer comprising a compact carbon layer, wherein particles are attached to the compact carbon layer, recesses are present in the compact carbon layer, and the particles are at least partially stuck in the recesses.

The invention relates to a preparation method of a heat-conducting flame retardant, with a core-shell structure, which can improve the compatibility of a polymer matrix and has flame retardant and heat-conducting properties, and application of the heat-conducting flame retardant in a battery shell. According to the invention, magnesium hydroxide and a carbon-based nano-filler are subjected to chemical grafting modification through a silane coupling agent to reduce the surface polarity, and then are sealed and coated with silicon rubber, the carbon-carbon double bond of the silicon rubber and the magnesium hydroxide with the surface grafted with graphene aminopropyltriethoxysilane undergo an addition reaction to form a core-shell structure with a Si-O-Si bond to coat the surface of the magnesium hydroxide, so that the magnesium hydroxide is changed into a super-hydrophobic state from the original hydrophilic state. In addition,the Si-O-Si bond can form a ceramic structure to wrap the surface of the material in the high-temperature combustion process to form a compact carbon layer to isolate air, thereby achieving the purpose of flame retardance. The problems of hydrophilicity of magnesium hydroxide, compatibility of a polymer matrix and agglomeration of graphene are solved.

The invention provides a preparation method of a graphene functionalized silicon-based probe. According to the graphene functionalized silicon-based probe provided by the invention, the ionic liquid is adopted to perform carbonization pretreatment on the probe sample, and the carbon layer plated on the surface of the probe in advance is utilized to protect the silicon-based probe tip, so that the reaction between the metal coating and the silicon-based probe is effectively avoided in the high-temperature quenching process of graphene growth; therefore, graphene successfully grows on the surface of the probe, the appearance of the tip of the probe is maintained, the surface of the tip is flat, and the diameter of the tip is nano-sized. The graphene functionalized silicon-based probe prepared by the method has excellent tip sharpness, conductivity and oxidation resistance.