257 results about "Shape-memory polymer" patented technology

The robot simulation skin structure comprises a temperature control unit and an evaporation heat dissipation unit, the temperature control unit comprises a flexible base layer and a silver electrode layer, the silver electrode layer covers the flexible base layer, the flexible base layer is made of a flexible PTC material, the evaporation heat dissipation unit comprises a liquid storage layer and an opening and closing door, and the opening and closing door is made of a flexible PTC material. The opening and closing door covers the liquid storage layer, the opening and closing door is a shape memory alloy opening and closing door or a shape memory polymer opening and closing door, and heat dissipation liquid is arranged in the liquid storage layer. Therefore, according to the simulated skin structure, the temperature sensing function, the self-adaptive heating function and the evaporative heat dissipation function are integrated into a single flexible structure, the autonomous response of local heat management can be achieved without an external complex control system, and therefore an extra sensor, an extra controller and an extra complex circuit are omitted; independent work and quick response of each local area are realized, and the system structure is greatly simplified.

The invention discloses a shape memory polymer micro-nano column array preparation method based on femtosecond laser processing, and belongs to the technical field of bionic adhesive materials. According to the method, an epoxy resin type shape memory polymer serves as a matrix, an anodic aluminum oxide template and a femtosecond laser micromachining technology are combined, a nano-column array is formed through AAO template copying, then a micron-column array is formed on the surface of the template through femtosecond laser machining, and finally the micron-nano composite column array with the gecko foot imitating structure is obtained. The method has the advantages of being high in machining precision, high in structural controllability, simple in process, capable of achieving large-area preparation and the like, and is suitable for material preparation in the fields of bionic adhesion, micro-nano sensing, intelligent surfaces and the like.

The invention discloses an underground mine goaf filling body strengthening and subsequent mining joining method, and relates to the technical field of mine mining. Comprising the following steps of intelligent filling body construction and reinforcement, multi-source fusion intelligent monitoring and digital twinning construction, data-driven subsequent mining dynamic intelligent decision making and energy regulation and control, targeted restoration and collaborative ecological reconstruction. The intelligent filling body is made of the shape memory polymer fibers and the nanometer piezoelectric ceramic particles, the layering process is combined to improve the strength and real-time state feedback, the safety and durability of the filling body are remarkably improved, the high-fidelity digital twinborn model is constructed in a fused mode, intelligent decision making and active wave absorbing regulation are linked, and the stability of the filling body is improved. The subsequent mining efficiency can be effectively improved, the damage risk of the filling body can be effectively reduced, in addition, the damage area is accurately positioned through the unmanned aerial vehicle, directional grouting repair is conducted, heavy metal is solidified through microorganisms, solid waste is recycled, the resource utilization rate in the mining process is increased, and the environmental burden is reduced.

The invention relates to the technical field of preparation of high-moisture-absorption warm-keeping anti-wrinkle flexible cloth, in particular to high-moisture-absorption warm-keeping anti-wrinkle flexible cloth and a preparation process thereof.According to the designed moisture-absorption skin-friendly layer, alkali decrement treatment and silane coupling agent grafting treatment are combined, and the natural antibacterial property of coffee grounds is reserved; the shape memory polymer fibers of the anti-wrinkle layer deform when the temperature is larger than or equal to the glass transition temperature, the shape is fixed after cooling, a nanometer adhesive is melted in the hot pressing process to fill gaps of a framework, and the elastic recovery rate after repeated folding is far higher than 85%. The high porosity and low heat conductivity coefficient of aerogel fibers of the warm-keeping layer are combined with the heat storage and temperature regulation functions of phase change microcapsules, so that the air permeability of the warm-keeping layer is remarkably improved; all the layers are chemically bonded through plasmas to form covalent bond combination, so that the phenomenon of layering after multiple times of water washing or bending is effectively avoided.

The invention relates to the technical field of cables, and discloses a multilayer flame-retardant heat-conducting crosslinked polyethylene cable structure and a preparation process thereof. The product sequentially comprises a conductor layer, a heat-conducting flame-retardant buffer layer, a flame-retardant reinforced linkage layer and an outer sheath layer from inside to outside, wherein the heat-conducting flame-retardant buffer layer comprises a cross-linked polyethylene matrix, boron nitride, aluminum hydroxide and a shape memory polymer, and the outer surface of the heat-conducting flame-retardant buffer layer is provided with interlocking bulges with embedded heat-conducting microtubes; the flame-retardant reinforced linkage layer contains a cross-linked polyethylene matrix, expanded graphite and graphene, and a groove with a flame-retardant elastic piece is formed in the inner surface of the flame-retardant reinforced linkage layer. The preparation method comprises the following steps: firstly preparing the silver-plated conductor, then respectively preparing the heat-conducting flame-retardant buffer layer and the flame-retardant reinforced linkage layer, then aligning the two layers, carrying out hot-pressing compounding, carrying out irradiation crosslinking on the composite structure, and finally extruding and coating the outer sheath and carrying out cooling shaping. The product can be used in scenes of new energy power stations, data centers and the like, and has the advantages of synergism of flame retardance and heat conduction and long-term stability of an interlayer structure.

The present application relates to a kind of composite current collector and its preparation method, belong to secondary battery technical field.The composite current collector provided by the present application has the original structure of sharp cone for shape memory polymer support layer, and the opening of support layer is filled with foaming agent and foaming aid.A kind of composite current collector provided by the present application can reduce weight and improve the energy density of battery.Secondly, the composite current collector provided by the present application increases the heat-sensitive function, which can cut off the electrochemical reaction inside the secondary battery on one hand after the thermal runaway and external impact of battery, and can reduce the heat generation of secondary battery on the other hand when the secondary battery is at high temperature, which has a triple guarantee for the safety performance of battery.

The invention discloses a preparation method of a shape memory polymer nanorod array, and belongs to the technical field of bionic adhesive materials. According to the method, on the basis of an anodic aluminum oxide template, hydrophilic or hydrophobic chemical modification is carried out on the surface of the anodic aluminum oxide template, the surface wettability of a template pore channel is adjusted, and then the permeation behavior of an epoxy resin precursor in the pore channel is controlled. The preparation method comprises the following specific steps: modifying an AAO template, preparing and defoaming an epoxy resin mixture, filling the template, curing, removing an aluminum substrate, dissolving an aluminum oxide layer, and finally obtaining the shape memory polymer nanorod array with high Young modulus (1-20 GPa). According to the method, a template method is combined with chemical modification, the process steps are clear, the conditions are mild, the method is particularly suitable for preparing a hard micro-nano composite structure matched with the mechanical property of a gecko script characteristic material, and an effective technical support is provided for research of a high-performance dry adhesive material.

The invention discloses an ultraviolet-resistant and high-temperature-aging-resistant photovoltaic cable structure which comprises a cable conductor, and a buffer layer, an insulating layer, a shielding layer and a sheath layer which are sequentially arranged on the outer side of the cable conductor. The insulating layer is formed by co-extruding a heat-conducting buffer layer, a main insulating layer and a reflection isolating layer, and the heat-conducting buffer layer is provided with a heat-conducting channel along the axial direction; the shielding layer comprises a main body shielding layer and a thermal insulation layer. Silver-plated copper wires are embedded in the thermal insulation layer. Lotus-leaf-like bionic protrusions are arranged on the outer surface of the sheath layer, and a shape memory polymer film is embedded in the sheath layer. The cable conductor is made of high-purity oxygen-free copper and is spirally twisted, a ceramic composite coating is coated outside the cable conductor, and the buffer layer is a polytetrafluoroethylene film. According to the structure, through cooperation of multi-layer composite design and functional materials, the effects of rapid heat dissipation, improvement of temperature resistance and aging resistance, effective blocking of ultraviolet rays, enhancement of structural stability and the like are achieved, the problems that an existing photovoltaic cable is poor in weather resistance, insufficient in heat conduction and prone to structure failure are solved, and the photovoltaic cable can be widely applied to outdoor scenes such as photovoltaic power stations and the like.

The invention relates to the technical field of control of intelligent implanted medical instruments, and discloses an aneurysm neck sealing system and a control method. Digital subtraction angiography is adopted to measure the neck diameter in multiple directions, an average value is calculated, the target neck sealing radius is set by combining the size of an embolism device, and it is ensured that instrument type selection is scientific and reasonable. The triggering temperature and recovery kinetics of the shape memory polymer are determined through a constant-temperature experiment, an actual expansion radius model is established, and quantitative control over the heating process is ensured. A heat balance model is established by using the heat capacity and cooling curve of the embolism device, and temperature rise and heating power expressions are deduced, so that fine regulation and control of temperature and power are realized. And natural cooling is performed after heating to a set terminal point, the plugging effect is evaluated in real time through iconography measurement, and compensation heating or model replacement is performed according to actual differences to ensure the plugging effect.

The invention discloses aerogel thermal-insulation waterproof mortar and a preparation method thereof. The mortar is prepared from cement, hydrophobic aerogel, interface modified asphalt rubber powder, a composite phase change heat conduction material, blast furnace slag micro powder, silica fume, nano montmorillonite, titanium dioxide aerogel powder, expanded vermiculite, shape memory polymer emulsion, chitosan, charcoal powder, carbon fibers, basalt fibers and the like. The preparation method comprises the following steps: carrying out plasma treatment and modification with an organosilicon waterproofing agent to obtain hydrophobic aerogel; carrying out interface modification on the asphalt rubber powder by adopting a titanate coupling agent; a phase change microcapsule-carbon nanotube heat conduction network is constructed through ball milling compounding; a basic framework is formed by adopting a graded mixing process, and then functional components are introduced; and finally, realizing cross-linking curing of the shape memory polymer and the chitosan through ultrasonic assistance and programmed temperature control. The mortar prepared by the invention realizes integration of multiple functions, and effectively solves the technical problems of single performance and poor durability of a traditional thermal insulation material.

The invention discloses a resin-based aerogel heat-insulating coating and a process, and relates to the technical field of heat-insulating coatings. Comprising the following components in parts by mass: 60-90 parts of matrix resin, 15-25 parts of aerogel, 10-15 parts of a multi-stage flame retardant, 5-10 parts of modified montmorillonite, 5-8 parts of silicone rubber particles, 3-5 parts of chopped glass fibers, 2-4 parts of nano silicon dioxide, 1-3 parts of shape memory polymer particles, 1-2 parts of self-repairing microcapsules and 2.5-5 parts of other auxiliaries. According to the resin-based aerogel heat-insulating coating and the process, efficient synergistic flame retardance is achieved by introducing a multi-stage flame retardant, the flame retardance, the crack propagation resistance and the self-repairing function of the coating are remarkably improved by combining the shape memory polymer particles and a self-repairing microcapsule technology, meanwhile, a matrix resin formula and a filler dispersion process are optimized, and the heat-insulating performance of the coating is improved. The problem that a traditional aerogel heat insulation coating is prone to cracking and stripping in complex deformation and vibration environments is effectively solved, and therefore the overall heat insulation efficiency is improved, and the service life is prolonged.

An embodiment includes a system comprising: a backbone; a first polyurethane shape memory polymer (SMP) foam on the backbone; a second polyurethane SMP foam on the backbone; a third polyurethane SMP foam on the backbone and between the first and second SMP foams. Other embodiments are described herein.

The invention discloses a gradient vulcanization preparation method of a rubber sealing strip for an automobile, and relates to the technical field of automobile part manufacturing. The multi-layer structure blank comprises a functional outer layer, a first composite layer of a high-melting-point phase change material and an electrogenerated shape memory polymer, a second composite layer of a low-melting-point phase change material and a thermogenerated shape memory polymer, a core layer containing an induction medium and a functional inner layer. Through step-by-step control of core layer pilot vulcanization and outer layer synergistic vulcanization and in combination with directional infrared energy supplementation, the contradiction between insufficient corner vulcanization and overheating degradation of the core layer is solved, and the overall vulcanization uniformity of the product is ensured. By means of the synergistic effect of the shape memory polymer and the phase change material, gradient pulse cooling and post-treatment shaping are matched, vulcanization internal stress is effectively released, the product straightness and size stability are remarkably improved, and the deformation risk is reduced.

The invention discloses an intra-spinal anesthesia catheter device with a temperature compensation function, and relates to the technical field of medical instruments. The intra-spinal anesthesia catheter device comprises an anesthesia catheter body, the anesthesia catheter body comprises a thermoplastic elastomer and a shape memory polymer, and the thermoplastic elastomer wraps the outer side of the shape memory polymer. The intraspinal anesthesia catheter has the beneficial effects that through combination of an innovative intelligent material system and an active closed-loop control technology, the traditional contradiction that the rigid requirement and the soft safety of the catheter cannot be achieved at the same time in intraspinal anesthesia is fundamentally solved. The method has the primary advantage that the dynamic programmable adjustment of the mechanical property of the catheter is realized.

A left atrial appendage closure (LAAC) device may be adapted for occluding a patient's left atrial appendage (LAA). The LAAC device includes a shape memory polymer foam body that is adapted to expand from a crimped configuration for delivery to an expanded configuration after delivery. The shape memory polymer foam body. An adhesive layer is disposed relative to the shape memory polymer foam body.

This invention provides a temperature-resistant shape memory polymer plugging agent, its preparation method, and its application, belonging to the field of oil and gas drilling technology. The preparation method of this plugging agent includes the following steps: mixing acetic acid and perchloric acid to obtain a mixed acid, then adding bromate, potassium permanganate, and natural flake graphite, and stirring to obtain low-temperature expanded graphite; mixing cyanate ester, linear aliphatic epoxy resin, and an active diluent, then adding low-temperature expanded graphite, organotin compounds, and amine catalysts, and carrying out a curing reaction to obtain a temperature-resistant shape memory polymer material; testing the glass transition temperature (Tg) of the synthesized temperature-resistant shape memory polymer material, compressing it at (Tg+5)~(Tg+10)℃, and then cooling, pulverizing, and granulating to obtain the final product. The plugging agent of this invention can rapidly recover its original shape at high temperatures, accumulate and seal leakage channels, and form a high-strength sealing layer in fractures, meeting the requirements of safe and efficient drilling.

A method includes disposing a device into a borehole in proximity to a subterranean formation where a filter cake has been formed adjacent thereto, the device comprising a support structure and a shap

The present invention relates to the field of textiles, in particular shape-memory polymeric fibers (SMPF) for textile applications or medical applications where shape fixity and recovery can be kept constant over multiple shape-memory cycles. The present invention relates to a covered shape-memory polymeric fiber (cSMPF) (1) having a core fiber (10) comprising a shape-memory polymer fiber and a substantially unstretchable covering yarn (20) wound around the core fiber (10) in a manner that the maximum engineering strain (εmax) of the core shape-memory fiber is reduced to at most the strain at the yield point (εyield) of the uncovered core fiber (10) thus limiting the stretchability or deformation of the core shape-memory fibers and / or textiles and / or fabrics comprising a covered shape-memory fiber during programming or use so as to ensure maximum recoverable strain. Also disclosed is a process for producing a covered shape-memory polymeric fiber (cSMPF) (1), a shape-memory fiber and a shape-memory textile comprising a covered shape-memory polymeric fiber (cSMPF).

The invention relates to the technical field of damping structures, and discloses a shape memory polymer filled multistable negative Poisson's ratio structure damper which comprises a plurality of multistable structure shells which are of a bilateral symmetry structure and made of negative Poisson's ratio materials, cavities are defined in the multistable structure shells, and the multistable structure shells are arranged in an array mode; the shape memory polymer is arranged in the cavity, and the shape memory polymer is made of a shape memory negative Poisson's ratio polymer. The cavity is formed in the multi-stable-state structure shell, the cavity is filled with the shape memory polymer made of the shape memory negative Poisson's ratio polymer, the overall strength and rigidity of the structure can be improved while the negative Poisson's ratio characteristic is kept, and therefore the application range of the negative Poisson's ratio material in the vibration reduction field is expanded. The addition of the shape memory polymer is beneficial to improving the deformation capacity of the whole structure during bearing, and meanwhile, the structure can be recovered to the initial shape after being unloaded based on the recovery capacity of the shape memory polymer.

An occlusive implant may include a framework configured to shift between collapsed and expanded configurations, and an occlusive fabric secured to the framework. The fabric includes shape memory characteristics such that the fabric is configured to shift from a first to a second configuration when exposed to a stimulus. A method of making the fabric includes intertwining a plurality of filaments into the fabric, defining a permanent shape of the fabric in the second configuration, and heat setting the fabric in the first configuration. A method of making a shape memory yarn includes forming a core filament, and wrapping at least one shape memory filament helically around the core filament. The at least one shape memory filament is formed from a shape memory polymer and is configured to shift from a first to a second configuration when exposed to a stimulus.

The invention discloses a wear-resistant anti-bending cable, and belongs to the technical field of cable manufacturing. The invention discloses a manufacturing method of a wear-resistant anti-bending cable. The manufacturing method comprises the following steps: S1, preparing a conductor layer; s2, forming an inner sheath layer; s3, constructing a shape memory skeleton layer; s4, forming a high-modulus braid layer; s5, a segmented flexible fin buffer layer is formed; s6, preparing an outer sheath and a surface self-lubricating microcapsule layer; and S7, cooling, shaping and detecting. The polycaprolactone-polyurethane blended shape memory polymer (SMP) is introduced into the sheath layer, so that the compactness and permeability resistance of the material are remarkably improved. The polycaprolactone chain segment provides flexibility and low-temperature toughness, the polyurethane chain segment endows high strength and chemical stability, the polycaprolactone chain segment and the polyurethane chain segment are blended to form a multi-phase interpenetrating structure, permeation channels of oxygen, moisture and corrosion ions are effectively blocked, and the sheath layer can still keep excellent protection capability in a long-term high-humidity, high-salt and high-temperature environment.

The present invention relates to a shape-memory polymer having a 6-arm structure and use thereof. The shape-memory polymer according to the present invention exhibits shape-memory properties by cross-linking, can control temperature for shape restoration through monomer control and has biocompatibility. As a material, it can be developed into a medical material such as a support for the outer wall of blood vessels.

The present application relates to the technical field of materials, in particular to a multi-stage solidification shape memory polymer for 4D printing and a preparation method thereof. In view of the problem that it is difficult to build gradient mechanical functions by precisely regulating the structure modulus in a single structure of 4D printing, the present application obtains a single-component multi-stage solidification shape memory polymer by regulating the ratio of toluene-2, 4-diisocyanate-hydroxypropyl acrylate, shape memory polymer, polyethylene glycol 400 and 1, 3, 5-tris (6-isocyanate hexyl) -1, 3, 5-triazine-2, 4, 6-trione under the test feedback of the printing structure modulus, and solves the problem that it is difficult to build gradient mechanical properties in a single structure of 4D printing.

The application discloses a vegetable oil-based self-repairing photo-thermal response shape memory polymer, a preparation method and application thereof, and relates to the technical field of shape memory polymers. In a first step, oleic acid, formic acid and hydrogen peroxide are reacted to obtain an intermediate product A by using p-toluenesulfonic acid as a catalyst; in a second step, the obtained intermediate product A is reacted with hexamethylene diisocyanate and p-benzoquinone dioxime to obtain an intermediate product B; and in a third step, epoxy resin and an epoxy resin accelerator are added and heated to be cured to obtain the vegetable oil-based self-repairing photo-thermal response shape memory polymer. The oxime-urethane dynamic bond and the ester exchange dynamic bond in the vegetable oil-based self-repairing photo-thermal response shape memory polymer prepared by the application can endow the prepared polymer with excellent self-repairing ability and shape memory performance. The polymer is prepared by using a bio-based material, the process is simple, the mechanical performance is controllable, the self-repairing and shape memory functions can be realized under the condition of ultraviolet light excitation and heating, and the shape memory performance and mechanical performance loss after repeated use is small.

The invention relates to the technical field of insulators, in particular to a suspension type composite insulator and a preparation method thereof.The suspension type composite insulator comprises a core rod, an umbrella skirt and a sheath which are arranged outside the core rod, an interface bonding layer located between the core rod and the umbrella skirt and between the core rod and the sheath, and metal connecting devices assembled at the two ends of the core rod; the umbrella skirts and the sheath are made of a high-temperature vulcanized silicone rubber material, the high-temperature vulcanized silicone rubber material contains a microencapsulation self-repairing agent or a shape memory polymer, and the core rod is made of a nano modified glass fiber reinforced composite material. A microencapsulated self-repairing agent or a shape memory polymer is pre-dispersed in a high-temperature vulcanized silicone rubber material adopted by the umbrella skirt and the sheath, so that when the material generates tiny cracks or damages due to external stress in the use process, internal microcapsules can be broken and release repairing monomers; and the monomers are subjected to polymerization reaction at the damaged part, so that cracks are automatically filled and repaired.

Various precursor solutions and methods of 3D printing and other additive manufacturing approaches are provided for the manufacture of articles using photocrosslinkable vinyl shape memory polymers. In various aspects, articles are manufactured by a process comprising (i) exposing a precursor solution to an intensity and frequency of light to initiate photo-polymerization of the precursor solution to form a layer of the article; and (ii) repeating step (i) a number of times to form the article in a layer-by-layer approach; wherein the precursor solution comprises a first polymeric precursor comprising a plurality of vinyl terminated side-chains attached thereto. A vinyl-functionalized, photocrosslinkable SMP used as an example herein is a novel variant of a previously disclosed SMP composition, with higher amounts of vinyl functionalization but similar thermomechanical properties to the SMP library previously disclosed. Moreover, a unique combination of chemistries is disclosed that incorporates the aforementioned vinyl-functionalized SMPs along with acrylate-based crosslinkers. Additional novel compositions are disclosed containing the vinyl-functionalized SMPs with additional dithiol functionalizations, vinyl-functionalized SMPs with dithiol crosslinkers, as well as vinyl-functionalized SMPs with both acrylate-based and dithiol crosslinkers, as another means to tune degradation rates and other material properties. The articles can include a variety of articles such as stents, grafts, external sheaths, and the like. Beneficially, the printed articles can include a plurality of pores having an average diameter of about 50 pm to about 5000 pm, about 500 pm to about 2000 pm, or about 1000 pm even in the absence of a photoblocker.

The invention provides a circuit breaking module, a preparation method of the circuit breaking module, a circuit board assembly and a battery. The circuit breaking module provided by the invention comprises a deformation body, a first electric connecting piece and a second electric connecting piece, the deformation body comprises a conductor layer and a first shape memory polymer layer which are stacked, and the deformation body has a first form and a second form; the first end of the deformation body is fixedly connected with the first electric connecting piece, the second end of the deformation body is fixedly connected with the second electric connecting piece, and the first electric connecting piece and the second electric connecting piece are electrically connected with the conductor layer; under the condition that the temperature of the deformation body is increased to be larger than or equal to a preset threshold value from being smaller than the preset threshold value, the first shape memory polymer layer enables the deformation body to be deformed into a second shape from a first shape, and at least one of the first electric connecting piece and the second electric connecting piece is displaced; therefore, the distance between the first electric connecting piece and the second electric connecting piece is changed.

The invention discloses a material with a moisture permeable function and a preparation method and application thereof, the material comprises a base layer and a composite adhesive layer, and the composite adhesive layer is composed of a shape memory polymer with a glass transition temperature of 28-40 DEG C; the composite adhesive layer and the base layer are provided with holes corresponding in position, the hole diameter of the holes ranges from 0.1 cm to 0.2 cm, and the center distance between every two adjacent holes ranges from 0.8 cm to 1.0 cm. The opening of the material is automatically opened when the temperature is higher than the glass-transition temperature, and is automatically closed when the temperature is lower than the glass-transition temperature.

The application discloses an automatic assembling device of a hydraulic suspension and relates to the technical field of the hydraulic suspension, and aims to solve the technical problem that breakage is prone to occur when two parts contact in the press-fitting process. The flexible assembling mode of "spiral transmission pre-shrinking+thermal expansion and shrinkage" is adopted, so that the problems of rubber main spring tearing and shell chamfer deformation are avoided, and the structural integrity of the parts is ensured; the safety constraint structure of the shape memory polymer is carried, which can quickly harden to form a rigid barrier when abnormity occurs, limit the overtravel deformation of the expansion arc, and improve the stability of the assembling process; with the aid of the spiral concave cavity stamping design, the mortise and tenon type micro bonding structure is formed on the surface of the rubber main spring, the bonding area is increased and the stress is dispersed, the connection strength is strengthened, and the high-frequency vibration working condition is adapted; the damage, risk and reliability problems of the traditional press-fitting are solved through the cooperation of the three, and efficient guarantee is provided for the stable assembling of the hydraulic suspension.