82results about How to "Bend at will" patented technology

The invention discloses a fiber-reinforced flexible SiO2 aerogel heat-insulation material and a preparation method thereof. Silicon-containing substances such as tetraethyl orthosilicate, tetramethoxysilane, sodium silicate and the like are used as precursors, a fiber felt pad is used as a reinforcing body, fiber/SiO2 composite wet gel is prepared with a sol-gel technology, and the fiber-reinforced flexible SiO2 aerogel heat-insulation material is finally prepared through aging and supercritical drying. The synthesis process is simplified, the preparation cycle is shortened, the cost for synthesis of the SiO2 aerogel composite material is effectively reduced, defects of poor mechanical strength, large brittleness and the like of pure aerogel are overcome, the prepared composite aerogel keeps the excellent performance of the aerogel, the flexibility of the material is obviously improved, the material is better in integrity, capable of being bent at will and very good in heat-insulation effect, the heat conductivity of the material can be decreased to 19 mW/mK, the application range of the aerogel is enlarged, and the material can be applied to actual engineering as an independent bulk composite material.

The invention discloses an electrospinning composite micro-nano fiber air filtration membrane and a preparing method thereof. The air filtration membrane is prepared through an electrospinning method, the composite micro-nano fiber of the air filtration membrane is formed by nano-silver particles, enteromorpha activated carbon/titanium dioxide composite particles and a water insoluble high-molecular polymer, wherein the enteromorpha activated carbon/titanium dioxide composite particles are prepared from electrospinning TiO2/high-molecular polymer/enteromorpha nano particles (enteromorpha nano dry powder) composite nano fiber membrane through high-temperature heat treatment, acid pickling and smashing. The air filtration membrane is simple in preparing method, excellent in performance and capable of effectively adsorbing and decomposing formaldehyde and other harmful substances while blocking and filtering dust pollutants and has a good antibacterial function and a good comprehensive protection effect.

The invention belongs to the field of conductive ink and discloses transparent conductive ink and a preparation method thereof. The transparent conductive ink is prepared from, by weight, 0.5-50 parts of nano silver wire dispersion liquid, 15-35 parts of poly(3,4-ethylenedioxy thiophene)-poly(styrene sulfonic acid), 5-40 parts of an organic solvent, 5-40 parts of deionized water, 1-8 parts of dimethyl sulfoxide, 0.1-5 parts of a viscosity modifier, 0.01-1 part of a pH regulator, 0.01-2 parts of a surfactant, 0.01-1 part of a leveling agent and 0.1-0.5 part of an adhesion promoter. The solid content of the transparent conductive ink is no more than 2%; due to addition of dimethyl sulfoxide in a formulation of the conductive ink, conductivity of a PEDOT/PSS and nano silver wire combined system is effectively improved; a prepared transparent conductive film has advantages of high optical transmittance, low haze and low surface square resistance and is excellent in adhesion, conductivity and environmental stability.

The invention discloses conductive ink which comprises, in weight percentage, 5-50% of silver nano-wire dispersion liquid, 0.1-5% of conductive macromolecules, 0.01-0.5% of silane coupling agents, 0.1-5% of viscosity adjusting agents, 5-40% of organic solvents, 5-40% of deionized water, 0.1-5% of macromolecule resins, 0.1-5% of pH (potential of hydrogen) value adjusting agents, 0.1-0.5% of non-ionic surface active agents, 0.01-0.5% of wetting dispersants, 0.01-0.5% of leveling agents, 0.01-0.5% of defoaming agents and 0.01-1% of metal nano-particles. The invention further discloses a preparation method of the conductive ink, a reel-to-reel conductive film and a preparation method of the reel-to-reel conductive film. The conductive film prepared by the conductive ink has the advantages of low resistance, haze and production cost, good conductivity and high light transmittance and can be optionally bent and twisted, and the requirements of flexible touch screens can be met.

The invention relates to a preparation method of a flexible carbon nanotube-polyaniline thermoelectric device. The method comprises the following steps: adding a carbon nanotube and sodium dodecyl benzene sulfonate to an HCl solution and carrying out ultrasonic treatment and cell discruption; adding aniline, carrying out ultrasonic treatment and stirring the solution under the condition of an ice bath to obtain a carbon nanotube-aniline dispersion liquid; dropwise adding the HCl solution of ammonium persulfate, carrying out reaction and then obtaining a carbon nanotube-polyaniline dispersion liquid; putting fabric into a sodium hydroxide solution for heating, putting the solution into water at 60-90 DEG C for stirring, and taking out and drying the fabric; adding the fabric into the carbon nanotube-polyaniline dispersion liquid, carrying out ultrasonic treatment and drying, and repeating fabric dipping and drying steps; and cutting terylene obtained by drying into rectangular strips, alternately fixing the rectangular strips on a flexible substrate and connecting the rectangular strips with conductive fibers in parallel. The method is simple; the prepared carbon nanotube-polyaniline composite thermoelectric fabric has the advantages of being light in quality, good in flexibility and foldable, and can be assembled into a large-scale portable thermoelectric device.

The invention relates to the technical field of a plastic modified material, and in particular relates to a flame-retardant plastic modified material for the extrusion molding of an automobile corrugated pipe, and a preparation method thereof; and the flame-retardant plastic modified material for the extrusion molding of the automobile corrugated pipe comprises the following raw materials: 35-50 parts of polyamide 6 (PA 6) resin, 15-25 parts of linear low density polyethylene (LLDPE) resin, 10-20 parts of PA 12, 3-12 parts of ethylene-propylene-diene monomer (EPDM)-G-maleic anhydride (MAH), 15-25 parts of decabromodiphenylethane (DBDPE), 3-8 parts of Sb2O3, 1-5 parts of black master batch, 0.2-0.6 part of an antioxidant, 0.1-0.5 part of zinc stearate, 0.1-0.5 part of ethylene bis stearamide (EBS) and 0.1-0.5 part of methyl silicone oil. The flame-retardant plastic modified material is good in heat resistance and cold endurance, has the performances such as good tensile strength and impact strength, and has the flame retardant property reaching up to UL94-V0. The flame-retardant plastic modified material is simple in preparation method and few in needed equipment, thus not only improving the production efficiency and saving the production cost.

The invention discloses a flexible electric heating film heating layer containing a composite high-molecular polymer conductive framework material and a preparation method thereof, and the flexible electric heating film heating layer is prepared by dipping the composite high-molecular polymer conductive framework material in electric heating slurry, curing and then carrying out hot pressing treatment. The composite high-molecular polymer conductive framework material is a flexible porous material and has a continuous three-dimensional porous structure; and the material comprises a first high-molecular polymer, a second conductive high-molecular polymer (high-molecular conductive polymer), a doped graphene-based composite nanosheet material and a carbon nanotube. The flexible heating film heating layer prepared by the method can overcome the problems that an electric heating layer in the prior art is poor in interface bonding property and bending resistance, filler is easy to fall off,the material consumption of the heating layer is not adjustable and the like.

The invention relates to a transparent polystyrene linear material for 3D printing and a preparation method thereof. The transparent polystyrene linear material is prepared by adopting the following raw materials: a compound of transparent polystyrene and transparent styrene-butadiene irregular copolymer in a mass ratio of (0 to 90): (100 to 10); transparent pigments accounting for 0 to 5 percent of weight of the compound; and an antioxidant accounting for 0 to 5 percent of weight of the compound. The polystyrene linear material for the 3D printing is simple in preparation process, low in cost, good in mobility, high in strength, high in flexibility, capable of being randomly bent and high in transparency and overcomes the weaknesses that the high-flexibility polystyrene linear material for the 3D printing on the market at present such as ABS, HIPS and the like is relatively low in mobility, has high possibility of blocking a printer nozzle and is not transparent.

The invention discloses a lasso artificial muscle driving-type knee joint exoskeleton device, which comprises an exoskeleton fixing frame system, a stress rotating joint system and a lasso transmission system. According to the device, a controllable rope chuck and a lasso transmission system are used for simulating the motion form of biological muscles; when the exoskeleton needs to be driven to move, the rope chuck at one end controls the clamping rope through an electromagnetic signal, a motor serving as a power source rotates after being powered on, power is transmitted to the rope throughthe chuck and then transmitted to a tail end rotating joint, and the function similar to active contraction after muscles are stimulated is achieved. In order to better simulate the muscle form of people, series-parallel connection springs are added in the mechanism, the elasticity of tendons and muscles is simulated, and vibration and impact generated in the driving process are effectively reduced. The safer and more flexible driving is achieved, and a wearer of the exoskeleton feels more comfortable; the structure is smaller and lighter, the motor can be placed on the back away from the kneejoint, and the load of the knee joint is reduced.

The invention relates to a preparation method of a PPy-SWCNTs nano composite thermoelectric film and the nano composite thermoelectric film. The method comprises steps of 1) dissolving a proper amountof oxidizing agent and doping agent p-toluenesulfonic acid in the water to obtain solution A, and pre-cooling the solution A at 6-10 DEG C for 1-2 hours; 2) ultrasonically dispersing pyrrole monomersand SWCNTs powder into cyclohexane solution to obtain solution B; 3) dropwise adding the solution B into the solution A to form a clear interface; and 4) fully reacting at the temperature of 6-10 DEGC, cleaning and drying to obtain the PPy-SWCNTs nano composite thermoelectric film. Compared with the prior art, high conductivity of a PPy nano film obtained through low-temperature interfacial polymerization and the high Seebeck coefficient of the SWCNTs are effectively combined, a power factor at the room temperature reaches 37.6 mu V/mK<2>, and in addition, the preparation method is simple, high in repeatability and the like.

The invention relates to a thermoacoustic refrigeration device based on an oscillating-flow heat pipe, which solves problems in prior art of low whole refrigeration efficiency due to low heat conversion efficiency. The invention is provided with higher heat conversion efficiency, thereby improving refrigeration coefficient of the thermoacoustic refrigeration device. The structure of the thermoacoustic refrigeration device comprises a oscillating cavity in which a cold end heat conversion device and a hot end heat conversion device are provided, a pack is provided between the two heat conversion devices, and the cold end heat conversion device and the hot end heat conversion device are respective a set of oscillating-flow heat pipe.

The invention provides a motor based on a pulsating heat pipe. The motor comprises a distributed stator winding, a stator core, a central shaft and the pulsating heat pipe. The stator winding, the stator core and the central shaft are coaxially arranged; the stator core is provided with a plurality of stator grooves used for placing windings; the pulsating heat pipe comprises a condensation section and an evaporation section; and in a radial direction of the stator, an evaporation section of the pulsating heat pipe in the stator groove is located between the bottom of the stator groove and oneeffective edge of the stator winding. According to the technical scheme, a winding is directly cooled through the pulsating heat pipe, the temperature of the stator assembly is reduced, and motor cooling efficiency is improved.

The present invention discloses an automatic pickup and placement assembling mechanism for a soft PCB (printed circuit board) and belongs to the technical field of an assembling mechanism, and particularly relates to an automatic pickup and placement assembling mechanism for a soft PCB. An automatic pickup and placement assembling mechanism for a soft PCB is provided in the present invention, withhigh working efficiency and high product qualification rate. The automatic pickup and placement assembling mechanism comprises a fixed platform, a PCB placement box with an inner wall outline corresponding to the shape of the soft PCB, and a pickup suction head with a suction surface corresponding to the shape of the soft PCB, wherein a transverse transmission mechanism and a turntable are arranged on the upper end of the fixed platform; the automatic pickup and placement assembling mechanism is characterized in that a longitudinal transmission mechanism is arranged on a transverse transmission base of the transverse transmission mechanism, and the pickup suction head is arranged on a longitudinal transmission base of the longitudinal transmission mechanism; and a turntable transmission mechanism is arranged on the lower end of the fixed platform.

The invention discloses a method and a device for pumping particle bentonite. The method comprises the following steps: (A) the particle bentonite is poured into a feeding tank; (B) a pumping valve isopened; a sucking valve is closed; and a piston rod moves up and down; (C) along with up-down movement of the piston rod, lubricating oil is extruded from lubricating oil boxes on the two sides of adischarge tank; (D) after the discharge tank is fully filled with the bentonite, the piston rod is downwards pressed; (E) a middle vibrator and a discharge port end vibrator are opened; and (F) the sucking valve is opened; and the pumping valve is closed. The feeding tank and the discharge tank are connected through a sucking pipe; the piston rod is embedded into a piston; the discharge tank is connected with a pumping discharge pipe; the pumping discharge pipe is connected with a single-section discharge pipe; the single-section discharge pipe is connected with a single-section discharge pipe; and the tail end of the single-section discharge pipe is connected with the end vibrator. The method is easy to realize and convenient to operate, and needs no heavy mechanical force for compaction.The device is simple in structure and convenient to use, can use an atmospheric pressure effect for uniformly and densely filling bentonite particles in grooves in underground diaphragm walls, and islow in cost and convenient to construct and operate.

The invention discloses a paraffin heat insulating material for thermal therapy and a processing method thereof. The material is prepared from, 20-30 parts of polyurethane foam, 7-9 parts of paraffin, 2-6 parts of modified bamboo fiber, 2-3 parts of foaming agent and 2-3 parts of surface active agent. The paraffin heat insulating material is good in heat insulation effect and flexibility, can be bent randomly, is suitable for being applied to the outer side of a hot pack, and has great heat insulation effects.

The invention discloses a split portable circulating fluid film filter screen type respirator. The split portable circulating fluid film filter screen type respirator comprises a mouth and nose shield, an oral cavity partition board, an air supply pipeline, an air filter box, an air storage cavity and a remote-control handle. A soft metal strip is arranged in a covered silicon edge of the mouth and nose shield. An exhaust valve is installed in an exhaust port. The air filter box can be fixed at the back or in front of the chest or on the waist through an elastic belt. Multiple filter screens are installed at an air inlet of the air filter box. A piece of circumferential ring filter cloth, a supporting roller, a tensioning roller, a folding roller, a fluid containing tank, a fluid regulating plate, an axial flow fan, a stepping motor, a rechargeable battery and a circuit board are arranged in a power cavity of the air filter box. The axial flow fan, the stepping motor and an electric heating net are all controlled through the remote-control handle. According to the split portable circulating fluid film filter screen type respirator, toxic and harmful solid and liquid particles larger than PM2.0 in the atmosphere can be filtered out, and germs and viruses can be killed through immersion liquid on the filter cloth; the electric heating net is installed in the air storage cavity, air is heated, and diseases of the respiratory tract of a wearer caused by the irritation of cold air are avoided during season changing. By the adoption of the split portable circulating fluid film filter screen type respirator, clean air is supplied into the mouth and nose shield, and the safety of the respiratory system of the wearer is guaranteed.

The invention discloses an oral cleaning medical care device and belongs to a medical device. The oral cleaning medical care device has good visibility, is easy to operate and has high safety. The oral cleaning medical care device comprises a handle, a brush roller and a motor. A support shaft (5), the motor (9) and a syringe (14) are arranged in the handle (10). A shaft sleeve (6) is mounted on the support shaft (5). The motor (9) drives the shaft sleeve (6) to rotate. A piston rod of the syringe (14) is tightened by a spring (13). The brush roller (1) has a jacket-like structure. The jacketis provided with water outlet holes. The right end of the jacket is provided with a ring groove. The ring groove is communicated with a water chamber (2). The brush roller (1) is fixed to the supportshaft (5). The ring groove is blocked through the handle (10) so that a water injection chamber (4) is formed. The water injection chamber (4) is communicated with the syringe (14) through a water passage (15). The oral cleaning medical care device has a simple structure, is easy to operate, has good cleaning effects and is used for oral cleaning medical care.