31results about How to "Has shape memory properties" patented technology

A space expanded three-wing-beam shaped remember polymer compound and the preparation thereof relates to a space expanded three-wing-beam shaped remember polymer and the preparation thereof, and to solve the problems of large material weight, complicated expanded mechanical performance, unsteady controlling of the expanding-telescoping procedure, and complicated fabrication technology in the existing space expanded beam structure design procedure. The compound material layer of the shaped remember polymer compound is shaped as superposition and the electric resistance silk screen is located therein. The inner of the compound material layer bending part of the shaped remember polymer compound is connected with a yalloy material layer, the preparation of which comprises the steps of: sorting, confect material, curing. The invention has the advantages of: high specific strength, small material weight, strong controlling ability for beam expanding, simple mechanical performance of the space beam expanding. Moreover, the invention has the characteristic of shaped remember and simple technological operation of the preparation.

The invention discloses a two-way linear driver based on a shape memory material actuator and belongs to a linear driver technique. A stator and an end cover are respectively and fixedly arranged at the two end parts of a shell through a stator installation bolt and an end-cover installation bolt, a rotor is configured in the shell, the two side parts of the rotor are respectively inserted in the central holes of the stator and the end cover, an S-shaped shape memory polymer composite material actuator is configured in a central inner hole on one side of the rotor, the two ends of the S-shaped shape memory polymer composite material actuator are respectively fixedly connected with the stator and the rotor through a stator bolt and a power bolt, and the two ends of a shape memory alloy tension spring are respectively connected with the stator and the rotor. The driver disclosed by the invention is simple and compact in structure, large in drive output displacement, reliable in use, easy to operate and controllable in displacement, and can be used for achieving an effect of two-way linear drive.

The invention provides a low-cost and stable lithium battery silicon negative electrode and a preparation method thereof. Silicon-based nanoparticles, liquid silicone rubber and ethylene-vinyl acetatecopolymer are uniformly mixed up according to a mass ratio of 10: 3: 1, and then are heated, melted and dispersed. In this way, silicon-based nanoparticles are uniformly dispersed in the melt. Afterthat, a curing agent, graphene powders and carbon fibers are added into the melt prefabricated in the step (1), and the mixture is ultrasonically dispersed to obtain a slurry. The slurry is coated onthe surface of a negative current collector, and then is cured at 80 DEG C for 2 hours. After that, the material is dried, slit and tabletted to obtain the lithium battery silicon negative electrode.According to the invention, nano silicon is directly dispersed in the deformation memory silicone rubber to prepare the silicon negative electrode. The system has self-repairing performance and shapememory performance at a certain temperature. The problem of silicon expansion fragmentation is well solved. The preparation process is greatly simplified, and the preparation cost is reduced. The defects that an existing technology for solving the problem that a silicon negative electrode is prone to expansion is complex and high in cost, and the size is increased after porosity is achieved are overcome.

The invention provides a preparation technology for tin-based shape memory alloy powder used for 3D printing. The preparation technology comprises the following steps that Sb and Cu are added into a smelting furnace to be completely melted, Sn is added to be continuously stirred, then a graphene hydrochloric acid solution is added, after temperature rise and even stirring are carried out, Pb, Zn and Al are added to be stirred at high speed, and tin-based alloy liquid is obtained; the tin-based alloy liquid is added into shape memory alloy particles, repeated fusion treatment is carried out, and the tin-based shape memory alloy liquid is obtained; under the atmosphere of protective gas, the tin-based shape memory alloy liquid downwards flows out through a flow guide nozzle, an ultrahigh pressure spraying nozzle atomizes and crushes metal liquid into a large quantity of wee liquid drops under the effects of high pressure air flow and supersonic waves, the liquid drops are cooled and solidified during rotary flying, and the tin-based shape memory alloy particles are obtained; and the tin-based shape memory alloy particles are screened and processed to obtain the tin-based shape memoryalloy powder used for 3D printing.

The invention relates to a preparation method and application of a eucommia ulmoide gum shape memory material. The process of firstly, banburying and secondly, tabletting is adopted. The composite isprepared through the dynamic vulcanization technology. The material has the two beneficial effects that firstly, the impact resistance is excellent, and the impact strength of the material is improvedby more than three times compared with that of common PP materials; and secondly, shape memory performance is achieved.

The present invention relates to a high-damping marmem. In the original marmem Ti-Ni-Cu the trace rare earth element Y is contained, the content of Y is 0.01-5 at%. Said invented high-damping alloy utilizes the regulation of content of constituent element Cu and Y can raise and control martensific phase transformation temperature of the alloy so as to obtain high-damping alloy with wider working temperature range. Said invented high-damping alloy can be smelted by adopting vacuum induction smelting process or electric arc process, can be directly prepared into the antivibration component product. Said invented high-damping marmem has excellent damping performance, wider application range, lower cost and excellent antifriction, wear-resisting and corrosion-proofing properties.

The invention relates to a shape memory alloy soft body driver. The shape memory alloy soft body driver comprises a shape memory alloy wire, a flexible substrate, a reinforcing layer and a heat dissipation coating; the shape memory alloy wire is arranged in the flexible substrate; the reinforcing layer is arranged on the neutral surface of the flexible substrate; and the heat dissipation coating is sprayed on the surface of the shape memory alloy wire. The shape memory alloy soft body driver disclosed by the invention has the advantages of being high in response speed, convenient to manufacture, capable of driving a traditional structure to be integrated and the like. The shape memory alloy soft body driver is suitable for the fields of space operation, surgical operation robots, flexible manufacturing and the like.

The invention discloses a gas separation membrane having a shape memory property; the gas separation membrane is prepared by the steps: firstly, forming a copolymerized linear oligomer from dianhydride 4,4'-(hexafluoroisopropylidene)diphthalic anhydride, diamine 4,4'-diaminodiphenyl ether and 2-(4-aminophenyl)-5-aminobenzoxazole, then carrying out a reaction of the copolymerized linear oligomer with 2,4,6-triaminopyrimidine gradually to form hyperbranched macromolecules, and finally, carrying out thermal imidization to obtain a hyperbranched polyimide membrane. The hyperbranched polyimide membrane has large specific surface area and can achieve gas adsorption; by adjusting the stiffness and flexibility of a structure of polyimide, the hyperbranched polyimide membrane has different adsorption characteristics on different gases, so as to achieve gas separation characteristics. In addition, the hyperbranched polyimide has obvious glass transition temperature, the transition can be used as a shape memory reversible phase, mutual entanglement of macromolecular chains and intermolecular strong interaction force in the polyimide structure can be used as a stationary phase, and thus the hyperbranched polyimide is endowed with the shape memory property.

Provided are an electroshape memory composite material, a preparation method and applications. Styrene-isoprene-styrene segmented copolymers and low-density polyethylene (SIS / LDPE) with a weight ratio of 60:40-80:20 are subjected to radiation crosslinking, a polymer matrix is prepared, then graphite with a mass fraction of 6%-30% of the polymer matrix is added, and the mixture is blended. The invention also comprises a preparation method for an electrographite / SIS / LDPE composite material and applications. The electrographite / SIS / LDPE composite material has an electroshape memory characteristic. Experiments prove that when the graphite content is higher than 6%, the graphite / SIS / LDPE composite material has a good electroshape memory characteristic. In addition, under action of a certain voltage, the deformation reversion rate can reach 100%, the response time decreases along with increase of the graphite content, and the response time of a sample is shortened along with increase of the voltage. In addition, electrocirculation shape memory tests for many times show that the deformation reversion rates are all higher than 95%.

The invention relates to a production method of a spinning solution having a memory function. The production method comprises the steps of 1, preparing a fiber-forming polymer solution; 2, preparing slurry with the memory function; 3, uniformly dispersing the fiber-forming polymer solution prepared in step 1 and the slurry with the memory function prepared in step 2 in stirring equipment, and storing the materials for 24-36 hours till the materials are cured completely, so that a shell spinning solution is obtained, wherein the shell spinning solution can be used for spinning shells. According to production method, the modified spinning solution is prepared, it can be guaranteed that after silk flocks are subjected to drafting and thermoforming, basically no residual stress exists, and the silk flocks are unwound smoothly; what is more important, a fiber product which is stable in structural performance, good in mechanical performance and low in fiber modulus and has the shape memory characteristic is obtained.

The invention relates to a method for manufacturing fibers with a memory function. The method includes the steps of core spinning solution manufacturing, shell spinning solution manufacturing and solution spinning. According to the method, by preparing spinning solutions modified by skin and cores respectively, it can be guaranteed that residual stress hardly exists in tows after drafting and heat setting, and the tows are unwound smoothly. More importantly, a fiber product which is stable in structural performance, good in fiber mechanical performance and lower in fiber modulus and has the shape memory characteristic is manufactured.

The invention discloses a hydrogel with adjustable adhesion in a wet environment and a preparation and use method thereof, belonging to the technical field of hydrogels. Add the initiator and solvent into the reaction mold, react at 60-80°C for 6-9 hours to obtain an organic gel, then place the organic gel in water, replace the organic solvent with water, and obtain a hydrogel . The present invention realizes the shape memory performance of the hydrogel and the anti-swelling performance of the hydrogel in water by introducing hydrogen bonds and dipole-dipole interactions as temporary cross-linking points; and then by constructing micropatterns on the surface of the hydrogel, Enhance the surface drainage performance of the material, realize the wet state adhesion of the hydrogel, and finally use the shape memory function to restore the surface microstructure, make the hydrogel into a planar structure, reduce the wet state adhesion of the hydrogel, and achieve Modulation of Adhesion of Hydrogels.

The invention relates to a curved surface composite cover plate, which includes curved surface glass and a plastic cover plate; the preparation method of the curved surface glass comprises the following steps: obtaining a curved surface fixture, fixing a glass sheet in the curved surface fixture, so that the glass piece maintains a curved surface appearance; The first tempering: the glass sheet is tempered for the first time, cooled to prepare semi-tempered glass whose tempering depth is 1 / 10‑1 / 1.5 of the preset tempering depth of the glass sheet; the second tempering: semi-tempered The glass sheet is subjected to a second tempering treatment, cooled, and a tempered glass having a tempering depth equal to the predetermined tempering depth of the glass sheet is prepared. The above-mentioned curved composite cover plate combines the above-mentioned curved glass with a plastic cover plate, and has better shape memory properties, more excellent explosion-proof properties and better flexibility than a single piece of curved glass and plastic cover plates.

The invention discloses a preparation method for a polylactic acid porous shape memory film. The polylactic acid porous shape memory film in the invention is formed under the synergic effect of crystallization and phase separation. The method specifically comprises the following steps: dissolving polylactic acid and polyethylene oxide at a certain weight ratio in a co-solvent, and stirring under room temperature, thereby forming a homogeneous polymer solution; scraping the polymer solution into a film by using film scrapers of different thickness; etching a polyethylene oxide phase in the film; after etching, placing the film into a vacuum oven and drying, thereby acquiring the biodegradable polylactic acid porous shape memory film. The polylactic acid porous shape memory film has a micron-scale penetrated porous structure and a shape memory property. The sizes of formed holes are correspondingly changed according to different film thickness, and meanwhile, the polylactic acid porous shape memory film macroscopically and microscopically has better shape memory effect and is expected to be applied to the fields of separation filtering, medical materials, and the like.

The invention provides a plastic particle and a yarn, the plastic particle includes shape-memory polyurethane, polyurethane and a polyurethane-type dispersant, wherein the shape-memory polyurethane is formed by the following steps: polymerizing a diisocyanate and a polyol to form a polymer, and The polymer is polymerized with a chain extender to form shape memory polyurethane. The yarn is made of the plastic pellets. The plastic particles and yarns have shape memory properties, and have good shape fixation rate, shape recovery rate, textile processability and textile applicability.

The invention discloses a two-way linear driver based on a shape memory material actuator and belongs to a linear driver technique. A stator and an end cover are respectively and fixedly arranged at the two end parts of a shell through a stator installation bolt and an end-cover installation bolt, a rotor is configured in the shell, the two side parts of the rotor are respectively inserted in the central holes of the stator and the end cover, an S-shaped shape memory polymer composite material actuator is configured in a central inner hole on one side of the rotor, the two ends of the S-shaped shape memory polymer composite material actuator are respectively fixedly connected with the stator and the rotor through a stator bolt and a power bolt, and the two ends of a shape memory alloy tension spring are respectively connected with the stator and the rotor. The driver disclosed by the invention is simple and compact in structure, large in drive output displacement, reliable in use, easy to operate and controllable in displacement, and can be used for achieving an effect of two-way linear drive.

The invention discloses a preparation method of polytrimethylene terephthalate fiber with shape memory characteristics, including: firstly, selected polyester polymer is provided with at least 0.8dL / g of intrinsic viscosity and contains at least 85mol percent of polytrimethylene terephthalate, wherein, at least 85mol percent of the repeating unit is composed of three-methylene; secondly, the polyester polymer is melted and transported through a screw melting extruder, the melting body is metered through a metering pump and is extruded out through a spinneret, and as-spun fibers are drafted successively through a pair of drafting hot rollers after being cooled through lateral blowing; thirdly, the drafted fibers are introduced into a group of grouping roller stereotype boxes with steam; fourthly, tow is introduced into a winding head to be winded into mold. The fiber made through the invention has the advantages of good packaging appearance forming, good structural stability and soft handle. And with lower modulus, the fiber is still provided with good elasticity and tensile recoverability. The textiles made of the fiber which are produced through the process are provided with goodshape memory characteristics.

The invention provides thermally reversible crosslinked polyurethane containing dicyclopentadiene crosslinking bridged bonds, and a preparation method and applications thereof. Dicyclopentadiene dicarboxylic acid and polyisocyanate (I) carry out reactions to generate a terminal isocyanate component, which contains a dicyclopentadiene structure and is taken as a crosslinking agent, and the terminalisocyanate component and a terminal hydroxyl component carry out reactions to form a crosslinked polyurethane network. By introducing dicyclopentadiene bridged bonds into polyurethane, at a high temperature, bridged bonds are broken; at a low temperature, bridged bonds are formed again; and repeated processing of chemical crosslinking type polyurethane is realized. The primary reverse Diels-Alderreaction temperature of dicyclopentadiene bridged bonds is 170 DEG C; and dicyclopentadiene bridged bonds are introduced into polyurethane to realized thermoplastic processing of crosslinking type polyurethane in a temperature range of 170 to 210 DEG C. The prepared thermally reversible polyurethane has an excellent repeated processing property, and still has good mechanical properties after manytimes of processing and moulding.

The invention discloses a gas separation membrane having a shape memory property; the gas separation membrane is prepared by the steps: firstly, forming a copolymerized linear oligomer from dianhydride 4,4'-(hexafluoroisopropylidene)diphthalic anhydride, diamine 4,4'-diaminodiphenyl ether and 2-(4-aminophenyl)-5-aminobenzoxazole, then carrying out a reaction of the copolymerized linear oligomer with 2,4,6-triaminopyrimidine gradually to form hyperbranched macromolecules, and finally, carrying out thermal imidization to obtain a hyperbranched polyimide membrane. The hyperbranched polyimide membrane has large specific surface area and can achieve gas adsorption; by adjusting the stiffness and flexibility of a structure of polyimide, the hyperbranched polyimide membrane has different adsorption characteristics on different gases, so as to achieve gas separation characteristics. In addition, the hyperbranched polyimide has obvious glass transition temperature, the transition can be used as a shape memory reversible phase, mutual entanglement of macromolecular chains and intermolecular strong interaction force in the polyimide structure can be used as a stationary phase, and thus the hyperbranched polyimide is endowed with the shape memory property.