362results about How to "Control mechanical properties" patented technology

The invention provides a composite enhanced through coupling of flaky and linear thermal conductive materials. The composite is obtained through compounding a porous flaky thermal conductive material, a linear thermal conductive material and a basis material, wherein the thermal conductive materials are at least one selected from graphite, diamond, graphene, carbon nanotubes, graphene coated diamond and carbon nanotube coated diamond; the basis material is a metal or a polymer; and high-thermal conductivity particles can be added in the basis material. According to the invention, the metal based or polymer based composite enhanced through coupling of the porous flaky thermal conductive material and the linear thermal conductive material has relatively high thermal conductivity in the direction parallel to the heat flux direction and the direction vertical to the heat flux direction, the industrial production can be achieved, and the application prospect is wide.

The invention relates to a microbolometer, which comprises a microbridge structure, wherein a thermosensitive resistance material and an infrared absorption material layer in the microbridge structure are of a carbon nanometer tube-amorphous silicon composite film, the carbon nano tube-amorphous silicon composite film is formed by compounding an one-dimension carbon nano-tube and a two-dimensional amorphous silicon film, and the microbridge structure is of a three-layer sandwich structure; the most bottom layer is of a amorphous silicon nitride film which is used as a supporting and insulation material of the microbridge; the intermediate layer is of one layer or multiple layers of carbon nano-tube-amorphous composite film, the stress is opposite to the nature of the bottom layer silicon nitride film, and the carbon nano-tube-amorphous composite film is used as the thermosensitive layer and the infrared absorption layer of the microbolometer; and the surface layer is of an amorphous silicon nitride film, the stress of the amorphous silicon nitride film is opposite to the nature of the intermediate carbon nano-tube-amorphous composite film, and the amorphous silicon nitride film is used as a passivation layer of the inforared sensing film and a control layer of the stress. The microbolometer and the preparation method can overcome the weaknesses of the prior art, improves the working performance of the part, reduces the cost of the raw material and are applicable to the industrialized mass production.

A method of enhancing 3D image information density, comprising providing a confocal fluorescent microscope and a rotational stage. 3D image samples at different angles are collected. A deconvolution process of the 3D image samples by a processing unit is performed. A registration process of the deconvoluted 3D image samples by the processing unit is performed. An interpolation process of the registered 3D image samples by the processing unit is performed to output a 3D image in high resolution.

The invention relates to a preparation method for a finely structured POSS hybridization low dielectric material. The method takes a POSS monomer containing an active group and dual functional group organic micromolecules capable of having a click chemical reaction as the precursor of the finely structured hybridization low dielectric material, and makes use of an environmentally friendly click chemical synthesis method to connect the finely structured POSS molecules and the organic micromolecules onto the low dielectric material structure orderly. Through changing the composition, structure and performance of the organic molecular chain connected with POSS, the method realizes the adjustment and control of the structure, porosity, thermal property, mechanical property and dielectric constant of the finely structured hybridization low dielectric material.

The invention provides a superhigh-thermal-conductivity continuous diamond skeleton reinforced composite material and a preparation method. The composite material is composed of a continuous diamond reinforced body and a base material. The continuous diamond reinforced body is prepared by depositing diamond films or diamond compound films on diamond particle preforms through a CVD method. The diamond compound films are graphene-wrapped diamond films or carbon-nanotube-wrapped diamond films. The base material is made of metal or polymer. Diamond powder is prepared into the performs, then the diamond films deposit on the surfaces of the performs through the CVD method, the diamond films are formed at the contact positions of adjacent diamond particles, and accordingly continuous heat conducting channels are formed between the isolated diamond particles. The deposited diamond films can serve as heat conducting bridges between the diamond particles, so that the dispersed diamond particles form a connection structure, accordingly high heat conductivity of diamond is fully used by the composite material, and the heat conductivity of the composite material is greatly improved.

The invention discloses a cartilage tissue engineering scaffold material and a preparation method thereof. The scaffold material is a three-dimensional porous structure formed by using sodium alginate and chitosan as a base material, and enabling the carboxyl on a side chain of the sodium alginate activated by activation cross-linking agent to react with amino group of chitosan, wherein molar ratio of the sodium alginate carboxyl to the chitosan amino group is (3:7)-(7:3), and the final product only contains two components, sodium alginate and chitosan. The three-dimensional porous scaffold provided by the invention has good biocompatibility, and is suitable for the cartilage tissue engineering.

A film-forming composition and a polymeric film or coating comprising hemicellulose, having a molecular weight of less than 50 000 g/mol, and at least one component selected from the group consisting of plasticizers, cellulose and a synthetic oligomer or polymer is disclosed. The use of said film or coating as an oxygen barrier is also disclosed. Further, a method for the manufacture of said polymeric film or coating is disclosed, as well as a method for improving the film-forming properties of hemicellulose having a molecular weight of less than 50 000 g/mol.

The present invention relates to material forming technology, and is especially mold and method for liquid state formation of aluminum hub disc for special vehicle. The mold includes a lower mold, a female mold casing, an upper mold, an inner male mold and an outer male mold. The corresponding forming process includes the steps of: making wear resistant reinforcing body, setting the reinforcing body inside the mold, pouring aluminum alloy liquid, and extruding. The mold has simple structure, the forming process is simple and high in efficiency, and the product has high performance.

The invention belongs to the technical field of cold rolled steel and discloses zinc-plated double-phase steel and a production method of the zinc-plated double-phase steel. The zinc-plated double-phase steel comprises, by weight percentage, 0.085%-0.115% of C, 0.15%-0.24% of Si, 1.45%-1.55% of Mn, not larger than 0.015% of P, not larger than 0.005% of S, 0.025%-0.065% of Alt, 0.14%-0.24% of Cr, 0.24%-0.29% of Mo, not larger than 0.006% of N and the balance Fe and other inevitable impurities. The production method includes the steps of KR desulfuration, converter steelmaking, LF+RH refining treatment, RH calcium treatment, continuous steel casing, billet heating, rough rolling, finish rolling, laminar cooling and winding; unwinding, acid pickling, cold continuous rolling and winding; and unwinding, cleaning, annealing, zinc plating, finishing and winding. Through composition design and process control, the zinc-plated double-phase steel is suitable for annealing production lines having the rapid cooling segment or not.

The invention provides a method for preparing a conductive composite nanofiber nervous tissue engineering scaffold based on graphene. The method includes the following steps: a step 1, dissolving tussur silk fibroin and poly (lactic acid)-poly caprolactone in a solvent with stirring till complete dissolution of the tussur silk fibroin and the poly (lactic acid)-poly caprolactone so as to acquiring a spinning solution; a step 2, performing electrostatic spinning on the spinning solution obtained from the step 1 so as to acquire a nanofiber membrane, performing steam fumigation treatment by using ethyl alcohol, and performing drying so as to acquire tussur silk fibroin/ poly (lactic acid)-poly caprolactone composite nanofibers; and a step 3, dipping the tussur silk fibroin/ poly (lactic acid)-poly caprolactone composite nanofiber scaffold material obtained from the step 2 in a graphene oxide dispersion liquid, taking out the tussur silk fibroin/ poly (lactic acid)-poly caprolactone composite nanofiber scaffold material, cleaning the tussur silk fibroin/ poly (lactic acid)-poly caprolactone composite nanofiber scaffold material, soaking the tussur silk fibroin/ poly (lactic acid)-poly caprolactone composite nanofiber scaffold material in an ascorbic acid solution, taking out the tussur silk fibroin/ poly (lactic acid)-poly caprolactone composite nanofiber scaffold material, and cleaning the tussur silk fibroin/ poly (lactic acid)-poly caprolactone composite nanofiber scaffold material so as to acquiring the conductive composite nanofiber nervous tissue engineering scaffold based on the graphene. The method is simple to operate, is excellent in repeatability, and can provide a new thought for nerve defect repairing.

The invention belongs to the technical field of flexible conductive fibers for wearable electronic devices and preparation thereof, specifically relates to a conductive coaxial nanofiber with a sheath-core structure of an aramid fiber or a polyamide fiber coating a reduced graphene oxide and a preparation method thereof, and provides a preparation method of a conductive fiber with a sheath-core structure. The preparation method of the conductive fiber with the sheath-core structure comprises the steps that (1), a core layer spinning solution is prepared; (2) a sheath layer spinning solution isprepared; (3) a coaxial fiber is prepared; and (4), high-temperature thermal reduction is conducted, specifically, the coaxial fiber obtained in the step (3) is subjected to the high-temperature thermal reduction to obtain a conductive coaxial nanofiber, that is, the conductive fiber with the sheath-core structure. According to the preparation method of the conductive fiber with the sheath-core structure, graphene oxide is used as the core layer material, and the high temperature resistant wet spinning polymer is used as the sheath layer material, thus reduction of the core layer graphene oxide through the high temperature thermal reduction can be realized, so that the obtained fiber has flexibility and also has the excellent electrical and mechanical properties.