40results about How to "Meet the needs of different projects" patented technology

The invention provides a preparation method of a thermal insulating material having ultralow density, ultrahigh elasticity and ultralow thermal conductivity, and relates to a preparation method of a thermal insulating material. The preparation method provided by the invention aims to solve the problems of high intensity, low elasticity and high heat conductivity coefficient of aerial and aerospace craft thermal insulating materials prepared by the existing method. The preparation method comprises the following steps of 1, preparing oxidized graphene; 2, preparing an oxidized graphene dispersion liquid; 3, preparing a carbon nano-tube dispersion liquid; 4, preparing an oxidized graphene / carbon nano-tube solution; 5, freeze drying; 6, reducing oxidized graphene-carbon nano-tube sponge; and 7, drying to obtain the oxidized graphene-carbon nano-tube sponge which is ultralow in density, ultrahigh in elasticity and ultralow in thermal conductivity, and then finishing the preparation method of the thermal insulating material ultralow in density, ultrahigh in elasticity and ultralow in thermal conductivity. The preparation method of the thermal insulating material having ultralow in density, ultrahigh in elasticity and ultralow in thermal conductivity is applied to the field of the preparation of the aerial and aerospace materials.

The invention relates to a film and a preparation method for a graphene / silver nanowire compound film with high thermal conductivity and high electric conductivity. The invention aims to solve the forming problem of the graphene / silver nanowire compound film. The method comprises the following steps: preparing a silver nanowire dispersion solution; preparing a graphene dispersion solution; mixing the silver nanowire dispersion solution with the graphene dispersion solution; preparing a compound film according to an electrostatic spraying deposition method; hotly pressing and sintering, thereby acquiring the graphene / silver nanowire compound film with high thermal conductivity and high electric conductivity. According to the method provided by the invention, the sample with high thermal conductivity, high electric conductivity, large size and uniform graphene dispersion can be prepared, the compound film is easy to separate from a substrate in a preparation process and the method can be widely applied to industrial production.

The invention discloses a preparation method of graphene paper having both a soundproof function and an electromagnetic shielding function, belongs to the field of graphene paper and aims to solve the problems that existing graphene paper preparation processes are complex, product size is limited by equipment and performance is unitary. The preparation method includes: 1, freeze-drying to obtain graphene oxide powder; 2, reducing the graphene oxide powder; 3, thermally sintering the graphene powder; 4, pressing to form the graphene paper. The preparation method can prepare large-size double-shielding-function samples and can be widely applied in the military field of aviation, aerospace and navigation.

The invention provides a spray-drying and hot-press vulcanization combination-based method for preparing a graphene / rubber composite material, and belongs to the technical field of graphene / rubber composite materials, aiming at solving the problems that an existing graphene / rubber composite material cannot use raw graphene without environment stress as filler and cannot be uniformly dispersed into nonpolar rubber by a simple process flow. The method comprises the following steps: 1, preparing a graphene dispersion liquid; 2, preparing graphene-rubber emulsion; 3, preparing graphene / rubber composite material powder by a spray-drying method; and 4, performing hot-press vulcanization with a flat plate to prepare the graphene / rubber composite material. The method can be widely applied to industrial production since pollution-free raw graphene is utilized as the raw material and can be uniformly dispersed into a non-polar rubber substrate.

The invention provides a multi-mode combined Beidou deformation monitoring data processing system and method. The system mainly comprises a data management module, a data processing module, a prediction analysis module and an early warning module, wherein the data processing module comprises a centimeter precision real-time resolving sub-module and a millimeter high-precision delay resolving sub-module. According to the method, the resolving modules with two precisions are used for resolving at the same time, the two resolving modules have a relation, the baseline length constraint informationcan be provided for the delay resolving through the real-time resolving, and the ambiguity fixing rate of a multi-baseline resolving module is increased; the deformation information can be checked and judged according to a deformation point ID provided by the real-time solution through the delay solution, so that the stability of a real-time result is improved, and part of gross error values areeliminated. On one hand, the delay solution can provide a high-precision solution result, on the other hand, a solution mode can be adjusted according to the real-time result, so that the timeliness of the delay result is improved, and the delay solution and the real-time solution supplement each other to improve the monitoring precision and timeliness.

The invention relates to load-bearing and heat-insulation concrete and a preparation method for the load-bearing and heat-insulation concrete and particularly relates to novel concrete, which has a uniform micropore structure and simultaneously has load-bearing capacity and a heat insulation function, prepared through forming an aqueous-phase uniform three-dimensional-network micropore structure by taking ettringite colloid as a template agent and adding a cementing glue material, fine aggregates, coarse aggregates, additives and admixtures. The load-bearing and heat-insulation concrete disclosed by the invention has the characteristics of light weight, high strength and low coefficient of thermal conductivity, can be used for preforming bricks, building blocks and sheet materials or components such as assembly-type stairs, wallboards, floor slabs, balcony slabs and roof panels in plant, can also be subjected to cast-in-place at a construction field site and is compatible with an aerated concrete production process, a foamed concrete production process and an ordinary concrete preforming production process at present, so that the transformation and upgrading of the traditional concrete industries are facilitated, and the load-bearing and heat-insulation concrete has remarkable practical significance in promoting the industrialization of Chinese residence and the development of environment-friendly building concrete materials.

The invention relates to a preparation method of a root-like carbon nanotube grafting carbon fiber reinforcement, relating to the preparation method of a carbon fiber reinforcement. The invention solves the problems that the traditional method has long process time and toxic procedures and prepares a root-like reinforced material which is mechanically engaged with a resin substrate and has poor interface adhesive performance. The method comprises the following steps: (1) processing a carbon nanotube with acid; and (2) putting carboxyl-modified carbon nanotube and dendritic macromolecule-modified carbon fiber into a solvent; then, reacting for 12-24h; filtering; and washing and drying the filtered carbon fiber to obtain the root-like carbon nanotube grafting carbon fiber reinforcement. Theobtained root-like carbon nanotube grafting carbon fiber reinforcement not only can form a mechanical engagement action with epoxide resin, but also enables a great amount of active functional groupson the surface to form chemical keys with open epoxy groups in the epoxide resin, improves the interface shearing strength of carbon fiber / epoxide resin composite material by 170-250% and improves the impact toughness of the epoxide resin by 60-85%.

The invention discloses a method for preparing a flexible high-conductivity graphene film, belongs to the field of graphene films, and aims to solve the technical problems that the size of conventional graphene sponge is limited by equipment and the graphene sponge is poor in flexibility in practical application. The method disclosed by the invention comprises the following steps: I, freezing an oxidized graphene dispersing solution for 10-24 hours at minus 50 DEG C to minus 20 DEG C, and performing freeze-drying for 72-100 hours so as to obtain oxidized graphene sponge; II, reducing the oxidized graphene sponge by using hydrazine hydrate steam; III, in the presence of an inert gas as a protection gas, performing thermal treatment; IV, performing pressurization treatment, thereby obtaining the graphene film. The method disclosed by the invention is simple in process, low in cost, high in production efficiency and good in controllability, a large-size sample can be prepared, different engineering requirements can be met, and the situation that conventional large-size graphene sponge is limited by experiment equipment is solved; in addition, the graphene film which is good in flexibility, high in conductivity and high in density is prepared by using the method.

The invention provides a preparation method of cement-based modified porous material, which mainly comprises the following steps: weighing raw materials, preparing cement-based slurry, preparing reinforced foam, and preparing cement-based modified porous material. The method of the invention is simple in process and low in cost, and the prepared cement-based modified porous material has excellent strength, toughness and thermal conductivity, can be used as a phase change material adsorption carrier, and significantly improves the heat storage performance of the composite phase change material , to meet the needs of different projects.

The invention discloses a method for modifying carbon fibers with dendrimers, which relates to a method for modifying carbon fibers. The organosilicon compound has only one functional group that can react with the modified surface of the fiber, so the film is limited to a two-dimensional surface and has poor stability. The method is as follows: carbon fibers are added into a strong oxidizing acid, subjected to ultrasonic treatment, heated to reflux, and dried, then added to a dendritic macromolecule solution for ultrasonic treatment, and then reacted at 20°C to 100°C for 1h to 24h, and then After washing and drying, dendrimer-modified carbon fibers are obtained. The dendritic macromolecule adopted in the invention has a three-dimensional structure, uniformly distributed numerous and dense external functional groups, low viscosity, unique rheological property, good film-forming property and good modification effect. The interfacial shear strength of the epoxy resin composite material prepared by using the carbon fiber modified by the dendritic macromolecule obtained by the method of the present invention is 53.2MPa-55.8MPa.