4results about How to "Realize batch preparation" patented technology

The invention relates to a large-breadth flexible damage sensing material and a preparation method thereof, belongs to the field of intelligent material preparation, and solves the problem that large-scale preparation of the large-breadth flexible damage sensing material is difficult in the prior art. The invention discloses a large-breadth flexible damage sensing material and a preparation method thereof. The large-breadth flexible damage sensing material comprises a flexible substrate layer, a conductive layer and a packaging layer, wherein the conductive layer is superposed on the flexible substrate layer; the packaging layer covers the conductive layer; the conductive layer is made of a laser-engraved polyimide film, a functional laser-induced graphene structure and an auxiliary separation structure which are etched by a laser engraving machine are arranged on the conductive layer, and the auxiliary separation structure comprises a film through hole and an edge cutting line; the large-breadth flexible damage sensing material provided by the invention is high in fineness, stable in performance and capable of meeting large-breadth sensing application, the preparation method of the large-breadth flexible damage sensing material is simple in step and high in preparation efficiency, and the large-breadth flexible damage sensing material which is stable in performance and high in fineness can be prepared in batches.

The invention belongs to the technical field of superconducting, and relates to an insulation enhanced superconducting cable and a preparation method thereof. The method comprises the following steps: firstly, reinforcing a superconducting wire rod through a NiCoCr / Cu composite matrix, and carrying out multi-channel coating and on-line monitoring by adopting BN modified polyimide paint to form a uniform insulating layer; and then wrapping and hot pressing are carried out by using a B-stage epoxy-impregnated aromatic polyamide tape to construct an insulation enhanced structure. Stranded cable forming is carried out through tension control and a numerical control positioning die, and the composite cable is formed by combining the core wire and the multiple layers of insulation reinforced wires. Finally, through secondary wrapping and pretension braiding protection, the superconducting cable with the coverage area larger than or equal to 99.9% and the void ratio smaller than 1% is obtained, the withstand voltage between strands is larger than 5000V, the withstand voltage between cables is larger than 7000V, the mechanical stability and the thermal management performance are remarkably improved, and the superconducting cable is suitable for being applied to high-field magnets and fast pulses.

The application discloses a kind of UN powder's quick preparation method, solve the carbon-thermal reduction-nitriding reaction method in prior art difficult to obtain high-purity UN powder, arc smelting method high cost, long cycle problem.A kind of UN powder's quick preparation method of the application, UO2 powder is reduced into metal uranium using metal reduction method, then using reaction heat makes metal uranium and nitrogen gas nitriding reaction, obtains UN powder.The application is more efficient, the reaction process is faster, more sufficient, UN production cycle is compared with arc smelting method greatly shortened, even shorter than carbon-thermal reduction method, can realize the batch preparation of high-purity UN powder in very short time.

The application relates to a preparation method of a HOF ratio fluorescent sensor and application of the HOF ratio fluorescent sensor in ammonia gas detection in exhaled air of patients with liver and kidney diseases. The material can detect trace ammonia gas, the lower limit of ammonia gas detection is 0.7 ppm, two opposite fluorescent response signals can accurately quantitatively detect the concentration of ammonia gas in the exhaled air of patients with liver and kidney diseases, the ammonia gas concentration obtained through testing keeps a high positive correlation with the blood ammonia concentration, specifically, the exhaled air of patients with liver and kidney diseases is collected in an aluminum foil gas collecting bag, the collected gas is introduced into an aqueous solution containing a ratio fluorescent sensing material Pt2Cu4@HOF-101, and the aqueous solution is statically placed for a period of time to complete ammonia gas detection in the exhaled air of the patient and fluorescent color development, or the patient directly blows the gas into the aqueous solution of the fluorescent sensing material to complete ammonia gas detection. Non-invasive rapid detection of liver and kidney diseases can be effectively realized, and the HOF ratio fluorescent sensor is expected to replace traditional blood ammonia detection and be applied to the fields of clinical diagnosis and disease course monitoring of liver and kidney diseases.