418 results about "Shape-memory polymer" patented technology

The invention provides a low-voltage cable, and relates to the technical field of cables, the low-voltage cable comprises a conductor layer, a support layer, a shielding layer and a sheath layer, the conductor layer is composed of multiple strands of fractal stranded conductors, and each fractal stranded conductor comprises an inner-layer superfine silver-plated copper wire, a middle-layer copper-clad aluminum wire and an outer-layer nickel-plated copper alloy wire; the supporting layer wraps the conductor layer and comprises an inner supporting layer, a dynamic framework layer and an outer restraint layer, the inner supporting layer is an obliquely wound aramid fiber woven belt, the dynamic framework layer is formed by alternately arranging shape memory polymers and carbon fiber composite belts, and the outer restraint layer is a spirally wound silica gel-glass fiber composite rope. The shielding layer comprises a tinned copper wire woven mesh; the sheath layer is a thermoplastic polyurethane matrix, a microcapsule self-repairing agent is dispersed in the thermoplastic polyurethane matrix, a microcapsule comprises a siloxane prepolymer, and the thermoplastic polyurethane matrix further comprises graphene nanosheets. Through collaborative design of the fractal stranded conductor layer, the dynamic skeleton support layer, the shielding layer and the self-repairing sheath, comprehensive improvement of cable performance is realized.

The invention discloses an intelligent defect detection system and a self-repairing method for a flexible base material RFID tag, and belongs to the technical field of Internet of Things electronic device manufacturing. According to the system, a three-dimensional dynamic scanning system is constructed by integrating a high-resolution image acquisition module, a multispectral sensor array and a mechanical arm motion platform, and surface and internal structure characteristics of a flexible substrate are captured in real time. A defect identification algorithm based on deep learning is combined with a multi-scale convolutional neural network and a transfer learning technology, precise classification of 12 types of defects such as microcracks, conductive layer fractures and base material deformation is realized, and the detection precision reaches 99.2%. A dual-mode self-repairing mechanism is put forward, specifically, nano-silver conductive colloid is injected through a microfluid channel for the defects of the conductive layer, and 3D structure reconstruction is achieved through a controllable temperature field; for substrate damage, a photoresponse shape memory polymer patch is adopted, and molecular-level bonding repair is achieved after ultraviolet light activation. According to the scheme, the detection efficiency is improved by more than 5 times, and the radio frequency performance of the tag is recovered to 98.7% of the initial value after self-repairing.

The invention discloses a coating as well as a preparation method and application thereof. The coating comprises the following raw materials: potassium silicate; ethyl orthosilicate; a nanometer titanium dioxide sol; rare earth is doped with nano titanium dioxide; compounding zinc oxide nanoparticles; nano silicon dioxide sol; a fluorosilane coupling agent; a fluorocarbon surfactant; a conductive carbon nanotube; nano aluminum oxide sol; an organic silicon modified acrylate emulsion; a boron nitride nanosheet; hollow glass beads; a shape memory polymer; the invention discloses a self-repairing nanofiber. After a coating is formed by using the coating, the coating has the characteristics of high light transmittance, good self-cleaning effect, high hardness, good adhesive force and excellent weather resistance, and can be applied to a photovoltaic module to replace an existing photovoltaic module coating product.

The invention discloses an intelligent operation and maintenance system for oil and gas field pipeline leakage detection, which comprises a quantum enhanced distributed optical fiber sensing unit, a leakage positioning unit and a self-healing unit, and is characterized in that quantum enhanced optical fibers implanted with nanoscale gratings are arranged along the outer wall of a pipeline, and a compressed laser light source is utilized to trigger vibration and sound wave signals; the superconducting quantum edge node performs quantum Fourier transform preprocessing on the signal, and realizes sub-meter accurate positioning by combining a space-time convolutional neural network model with pipeline physical parameters; and finally, the system drives the directional microwave device to activate the intelligent coating at the leakage point, the shape memory polymer microcapsule pre-buried in the pipeline coating is triggered to be broken and expanded, a self-adaptive sealing layer is formed, and full-closed-loop automatic response from quantum-level sensing to molecular-level repairing is completed. Detection and repair are completed autonomously, manual intervention is not needed, zero commuting time occupation is achieved, and the corresponding repair speed can be increased to the second level from the traditional day / hour level.

An adhesive gripper for pick-and-place maneuvers comprises one or more legs, where each leg terminates in a foot rotatably connected to the respective leg. Each foot includes a SMP dry adhesive comprising a shape memory polymer, and a rigid backing layer attached to a back side of the SMP dry adhesive, such that a front side of the SMP dry adhesive is available for attachment and release of objects. The adhesive gripper further includes a handle portion connected to the one or more legs, a release mechanism comprising a release ring within the handle portion, and one or more releasing rods integrated with the one or more legs for release of an object onto a substrate.

A preparation method of an explosion-proof thickened wear-resistant rubber and plastic pipe belongs to the field of rubber and plastic pipes, the explosion-proof thickened wear-resistant rubber and plastic pipe comprises an inner layer, a middle layer and an outer layer, the inner layer is an ultrahigh wear-resistant composite layer, is compounded by polytetrafluoroethylene and polyimide, and is reinforced by nanoscale silicon carbide particles and graphene; the middle layer is an anti-explosion energy absorption layer, a shape memory polymer is combined with crosslinked polyethylene to form an intelligent material capable of responding to pressure change, and a high-strength aramid fiber and carbon fiber composite material is embedded into the middle layer; the outer layer is an anti-explosion impact barrier layer, nano ceramic reinforced silicone rubber is adopted, and ultra-high molecular weight polyethylene is combined with ceramic particles, so that the high pressure resistance and the explosion resistance are improved. The inner layer adopts the high-performance material and the nano reinforced filler, so that the wear resistance is remarkably improved; a self-repairing coating technology is introduced into the outer layer, automatic healing of local damage is achieved through a microcapsule structure, the service life of the product is prolonged, and the maintenance cost is reduced.

The invention relates to the technical field of acoustic function material structure design, in particular to a Kresling origami-based local resonance phononic crystal, which comprises a substrate and a vibration reduction array embedded on the substrate, the vibration reduction array comprises a plurality of unit cell structures arranged in an array. Each unit cell structure comprises at least two spiral Kresling paper folding structures, and lead injection holes penetrating through the Kresling paper folding structures are formed in the Kresling paper folding structures. The substrate is one of an Archimedes spiral parallel plate, a chessboard embedded paper-cut, a double-layer Miura origami or a bistable shell based on a shape memory polymer; the material of the Kresling origami structure is lead, the density is 11600 kg / m < 3 >, the elastic modulus is 20.80 GPa, and the Poisson ratio is 0.369. According to the local resonance photonic crystal provided by the invention, through the unique geometric characteristics, a remarkable vibration band gap is generated in a low-frequency band, and vibration propagation in a specific frequency band is effectively inhibited; according to the Kresling paper folding structure, diversified vibration band gap configuration can be achieved by adjusting the folding angle and the number of layers.

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 invention discloses a super-hydrophobic self-repairing composite film for deicing fan blades and a preparation method of the super-hydrophobic self-repairing composite film. Isocyanate-based polyurethane and a hydroxyl-containing shape memory polymer are dissolved in cyclohexanone, and a mixed solution is obtained; spin-coating the mixed solution on the surface of glass fiber reinforced resin to form a substrate layer; uniformly mixing a microcapsule material and vinyl epoxy resin in methyl ethyl ketone, and spin-coating the mixture on the substrate layer to form a functional layer; and spraying the modified nano SiO2 particle suspension onto the functional layer to obtain the super-hydrophobic layer. The composite film has long-acting anti-icing performance, the self-repairing function of the composite film can cope with mechanical wear and environmental erosion, the shape memory polymer cooperates with pneumatic stripping of an ice layer through temperature triggering deformation, meanwhile, the nano structure enhances wear resistance and chemical inertness, and the composite film adapts to extreme environments such as low temperature and high humidity. The process is green and efficient, raw materials are easy to obtain, the operation and maintenance cost is remarkably reduced, and intelligent and sustainable anti-icing protection is provided for the fan blade.

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 self-adaptive wearing and monitoring method of an intelligent drainage monitoring system, and relates to the technical field of medical intelligent wearing, and the method comprises the steps: collecting the drainage part data of a patient through multi-modal biological characteristics, optimizing the wearing parameters through a particle swarm algorithm, and driving a shape memory polymer to adjust the equipment fitting degree, biochemical indexes, pressure and flow of drainage liquid are detected in real time through a micro-fluidic chip and various sensors, intelligent early warning of abnormity is achieved in combination with a self-adaptive neural network, parameters such as drainage negative pressure are automatically adjusted according to physiological signals of a patient, risks are predicted through a digital twinborn model, and a maintenance scheme is generated. According to the intelligent drainage monitoring system, self-adaptive wearing is achieved, and the comfort level of a patient is improved; real-time accurate monitoring and intelligent early warning are achieved, and medical safety is guaranteed; drainage parameters are automatically adjusted according to patient states, and treatment efficiency is improved; the intelligent dredging and anti-infection functions are achieved, the medical risk and cost are reduced, and the clinical application value is high.

The invention relates to an intelligent composite material diaphragm as well as a preparation method and application thereof. The intelligent composite material diaphragm comprises a shape memory polymer foam skeleton and a gel electrolyte filled in the shape memory polymer foam skeleton, the shape memory polymer foam skeleton is prepared from the following raw materials: epoxy resin and a D-230 curing agent; the gel electrolyte is prepared from the following raw materials: N-isopropylacrylamide, acrylamide, N, N '-methylene bisacrylamide, ammonium persulfate, tetramethylethylenediamine and a lithium salt solution. The intelligent composite material diaphragm can perform real-time response according to the temperature change in the working process of the battery, adjust the ionic conductivity to control the output power of the battery, provide over-temperature protection, have an automatic thermal protection function, further have a function of inhibiting the growth of lithium dendrites, can prolong the service life of the battery, and is suitable for popularization and application. And the battery is especially suitable for battery application scenes with high energy density and high safety requirements.

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 provides a 4D printing esophageal stent and a preparation method thereof. The esophageal stent comprises a stent main body and a drug-loaded fiber membrane with a core-shell structure, the stent main body is a tubular stent composed of a bionic water lily hollow structure; the diameters of the head end and the tail end of the support body are larger than the diameter of the middle section, and barb structures are arranged on the outer surfaces of the head end and the tail end. The stent main body is a biodegradable shape memory polymer; the drug-loaded fibrous membrane is positioned on the outer surface of the middle section of the stent main body, and the drug-loaded fibrous membrane contains drugs. The 4D printing esophageal stent provided by the invention has excellent compressive bearing capacity and anti-slip capacity, and the drug-loaded fibrous membrane can avoid esophageal restenosis through long-term uniform slow release of drugs, so that the life safety of a patient can be further guaranteed.

The invention relates to the technical field of building materials, and discloses a self-repairing modified asphalt waterproof coiled material, which comprises the following components by weight: 60-70 parts of an asphalt matrix; the invention also provides a preparation method of the self-repairing modified asphalt waterproof coiled material, and the preparation method comprises the following steps: S1, material pretreatment and mixing: mixing the modified asphalt matrix with the nano reinforcing material, the shape memory polymer, the thermal reversible high polymer material and the microcapsule repairing material; and S2, performing high-energy mechanical mixing treatment: performing mixing treatment by using high-energy mechanical mixing equipment to ensure that all components are uniformly dispersed. By adopting ultrasonic treatment, low-temperature freeze drying, vacuum hot-pressing curing and microcapsule repairing technologies, the excellent flexibility, self-repairing efficiency and stability of the modified asphalt waterproof coiled material at low temperature are realized, and the long-acting waterproof performance and durability of the material are remarkably improved.

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 current collector base material with a high-temperature-resistant shape memory function and a preparation method of the current collector base material, and relates to the technical field of battery materials. The method specifically comprises the following steps: S1, uniformly mixing a PET material, a high-temperature-resistant material, a shape memory polymer and a functional additive to obtain a raw material; s2, blending and processing the raw materials to form a melt; extruding to form a thin film; pulling and stretching, cooling and shaping, rolling, and controlling and adjusting quality; a base film is obtained; s3, carrying out antistatic treatment on the base film to obtain a current collector base material; compared with a conventional base membrane, the composite phase change material base membrane shows more excellent performance in the aspects of elastic modulus, extension strength and elongation through a unique strengthening mechanism, a good synergistic effect and a multi-phase structure, and the performance characteristics enable the composite phase change material base membrane to have more advantages in numerous application scenes.

The invention discloses an anti-fouling easy-to-clean coating and a preparation method thereof, and relates to the technical field of coatings. The invention discloses an anti-fouling easy-to-clean coating. The coating comprises the following raw materials in parts by weight: 30-50 parts of polymethyl methacrylate, 10-15 parts of modified nano titanium dioxide, 20-30 parts of a fluorocarbon polymer, 3-8 parts of a silane coupling agent, 8-12 parts of nano zinc oxide, 5-10 parts of a plasticizer, 2-6 parts of a dispersant, 1-3 parts of a leveling agent, 4-8 parts of a cross-linking agent, 1-3 parts of an antioxidant, 3-7 parts of a modified cellulose derivative and 2-5 parts of an antibacterial agent. And 5-10 parts of a modified shape memory polymer microcapsule. The anti-fouling and easy-to-clean coating disclosed by the invention is high in anti-fouling property, and the fluorocarbon polymer and the modified nano titanium dioxide are cooperated, so that stains are difficult to attach and can be decomposed by photocatalysis; cleaning is easy, and stains can be easily removed due to the low surface; the water seepage resistance is good, and the special modified cellulose derivative effectively blocks moisture; the antibacterial effect is good, and various microorganisms can be inhibited; and the self-repairing capability is also achieved, recovery can be achieved after damage, the service life is greatly prolonged, and the material protection requirement is comprehensively met.

An embodiment includes a wound dressing comprising: a shape memory polymer (SMP) foam, including open cells, having first and second states; and a hydrogel (HG) included within the cells; wherein (a) in a first position a composite, including the SMP foam and the HG, is configured to be located proximate a hemorrhagic tissue with the SMP foam in the first state; (b) in a second position the composite is configured to be expanded to the second state against the hemorrhagic tissue when the SMP foam is plasticized at 37° C. depressing a glass transition temperature (Tg) of the SMP foam to below 25° C. Other embodiments are described herein.

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 of the invention includes an expandable implant to endovascularly embolize an anatomical void or malformation, such as an aneurysm. An embodiment is comprised of a chain or linked sequence of expandable polymer foam elements. Another embodiment includes an elongated length of expandable polymer foam coupled to a backbone. Another embodiment includes a system for endovascular delivery of an expandable implant (e.g., shape memory polymer) to embolize an aneurysm. The system may include a microcatheter, a lumen-reducing collar coupled to the distal tip of the microcatheter, a flexible pushing element detachably coupled to an expandable implant, and a flexible tubular sheath inside of which the compressed implant and pushing element are pre-loaded. Other embodiments are described herein.

The invention relates to a 4D printing bionic artificial limb and a preparation method and application thereof, and relates to the technical field of medical rehabilitation instruments, the bionic artificial limb comprises a bionic skeleton and a flexible driving unit; the flexible driving unit is located at a joint moving part of the bionic skeleton and is used for driving the bionic skeleton to move; the bionic artificial limb is integrally formed through 4D printing, the bionic skeleton is made of a shape memory composite material, and the flexible driving unit is made of a hydrogel driving material; the shape memory composite material comprises a shape memory polymer and a reinforcing material in a mass ratio of (80-95%): (5-20%); the hydrogel driving material comprises a thermo-sensitive polymer matrix, a stabilizer and a functional filler in a mass ratio of (50%-80%): (20%-40%): (3%-15%). The 4D printing bionic artificial limb has the dynamic adjusting capacity, and the change requirements of the residual limb under different conditions can be met.

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 present invention discloses an environmentally friendly asphalt pavement structure with high anti-skid performance, which includes a base layer, an intermediate functional layer, and a surface layer laid sequentially from bottom to top; wherein the surface layer includes fiber-modified waste asphalt, shape memory polymer chemically modified waste asphalt, matrix asphalt, and additives compounded in proportion. The asphalt pavement structure of the present invention not only significantly improves the anti-skid performance of the pavement, but also enhances the wear resistance and durability of the pavement. It has excellent thermal insulation, noise reduction, and drainage properties, while ensuring good construction performance and environmental adaptability. The overall comprehensive performance is superior and can meet the long-term durability and stability requirements under different climatic conditions and traffic flows. The present invention also discloses a construction method for an environmentally friendly asphalt pavement structure with high anti-skid performance.