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347results about How to "With self-healing function" patented technology

Self-repair material and article with shape memory effect and preparation method thereof

The invention discloses a self-repair material with a shape memory effect. The self-repair material is prepared from a shape memory polymer material, a shape memory function can be achieved under the stimulation of light, heat, electricity and magnetism, and moreover, the self-repair and healing purposes are achieved. The composition and preparation method of the self-repair material are diversified, the shape change and self-repair functions of the shape memory material can be achieved through different manners, and the application of the shape memory material in the fields such as spaceflight, aviation, medical treatment and bioengineering is expanded.
Owner:SHENZHEN INST OF ADVANCED TECH

Preparation method and application of hyperbranched polyurethane acrylate interpenetrating polymer network waterproof agent

The invention provides a preparation method of a hyperbranched polyurethane acrylate interpenetrating polymer network waterproof agent. The method comprises the following steps: (1), synthetizing a waterborne polyurethane prepolymer with ends partially capped; (2), introducing hydroxyl-terminated hyperbranched polyester, and grafting by virtue of reaction between isocyanate in the waterborne polyurethane prepolymer and the hydroxyl of the hyperbranched polyester, thereby obtaining a hyperbranched waterborne polyurethane prepolymer; (3), adding part of ethenyl monomers and a neutralizing agent, salifying, and adding deionized water while stirring at a high speed so as to realize dispersion, thereby obtaining a hyperbranched waterborne polyurethane emulsion; and (4), dropwise adding residual ethenyl monomers and an initiator into the hyperbranched waterborne polyurethane emulsion, thereby obtaining a hyperbranched waterborne polyurethane / acrylate interpenetrating network structure emulsion. The emulsion has excellent waterproof performance, good washable and abrasion-resistant performances and does not contain PFOA and PFOS. The hyperbranched structure has a self-recovery function, is capable of realizing self repairing of damaged regions and is long in waterproof performance duration time.
Owner:DYMATIC CHEM

Method for preparing coating with metal surface corrosion inhibition and self-repair functions

The invention belongs to the field of anticorrosion materials, and relates to a green and environment-friendly method for protecting metal from corroding, which can particularly control metal corrosion for long time effectively, and play a role in self-repairing the metal surface to a certain extent. The method is characterized in that an inhibitor molecule and polyelectrolyte are alternately deposited on the surface of a silicon dioxide nano-particle through green environment-friendly type metal inhibitor micromolecules and polyelectrolyte by adopting layer-by-layer self-assembly technology and utilizing the penetrating controllability of a polyelectrolyte self-assembly membrane so as to prepare a functional nano-particle with the inhibitor and the polyelectrolyte self-assembly composite membrane which are coated on the surface; and the prepared functional nano-particle is mixed with sol-gel to prepare the functional sol-gel membrane coated on the metal surface to be protected. The coating has the function of metal surface self-repairing, and ensures that the inhibitor molecules released by the functional membrane are adsorbed on the metal surface to reform a protecting membrane in a coating damaged microsection to play a certain role in self repairing. The method is applicable to corrosion protection of various metals.
Owner:UNIV OF SCI & TECH BEIJING

Degradable magnesium alloy angiocarpy bracket with medicine and preparation method thereof

The present invention relates to technical field of biological material, and is especially suitable for surface modification field of biological medical material. Particularly the invention provides a medicine-taking degradable magnesium alloy cardiovascular bracket and a preparing method thereof. The aim of the invention is to reduce the initial degrading speed of magnesium alloy in biosome and carry therapeutic medicine on the surface of magnesium bracket thereby guaranteeing the mechanical performance of magnesium alloy bracket in vivo and better restraining the hyperplasia of newborn tunica interna. A fluoro-containing transition film is prepared on the surface of magnesium alloy bracket, and a medicine-carrying layer is prepared on the outer layer of magnesium alloy bracket. A protecting layer is the fluoro-containing transition film. The fluoro-containing transition film has self-concrescence capability in the degradation process of magnesium alloy and can effectively reduce the in-vivo degradation velocity of magnesium alloy bracket. The surface of degradable magnesium alloy cardiovascular bracket is smooth and is not easily generated with surface cracking and breaking-off. The medicine-taking layer is composed of medicine carrier polymer or protein and therapeutic medicine. The medicine-taking layer can release therapeutic medicine, reduce the generation rate of stenosis after the implantation of bracket and has a control function to the degradation velocity of magnesium alloy bracket.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI

Rust-proof soft film composition and preparation method thereof

The invention discloses a rust-proof soft film composition and a preparation method thereof, belonging to the technical field of metal protection and particularly relating to a metal rust preventing technology. The rust-proof soft film composition disclosed by the invention comprises the following components in a formula in percentage by mass: 40-70 of film forming agent, 2-10 of corrosion and rust inhibitor, 1-5 of vapor phase inhibitor, 4-10 of microcapsule antirust agent, 0-10 of pigment, 1-3 of rheological agent, 0.2-1.0 of defoaming agent and 10-25 of solvent. The rust-proof soft film composition disclosed by the invention has an excellent rust-proof effect and an excellent self-repairing function; rust-proof gas volatilized by the film can meet the rust-proof requirements of inner and outer surfaces of workpieces with complex structures such as inner metal cavities, inner walls of pipelines, grooves and the like; when the rust-proof soft film is destroyed in a use process, a rust-proof core with an excellent self-repairing function of the microcapsule antirust agent can be automatically repaired, so that the condition that the rust-proof film is invalid in advance because of being destroyed is avoided, and the protection time of a protective film is prolonged; and the rust-proof soft film composition can comprehensively meet the requirement for metal rust-proof protection under severe environments such as outdoor sun and rain, sand-dust and the like.
Owner:WUHAN RES INST OF MATERIALS PROTECTION

Self-repairing and oil stain-preventing coating and preparation method thereof, and protective film containing same and preparation method thereof

The invention relates to a protective film with self-repairing and oil stain-preventing functions, in particular to self-repairing and oil stain-preventing coating and a preparation method thereof, and a protective film containing the same and a preparation method thereof. The self-repairing and oil stain-preventing coating is prepared from the following raw materials in parts by weight: 10-80 parts of polyol, 1-50 parts of isocyanate, 1-10 parts of an auxiliary agent, 0.1-10 parts of an ultraviolet light absorber, 0.01-10 parts of an antistatic agent and 1-50 parts of a solvent. The protective film sequentially comprises a first release film, the self-repairing and oil stain-preventing coating, a film substrate, an ultraviolet blocking pressure-sensitive adhesive layer and a second release film. The protective film has a more excellent self-repairing function, a more excellent oil stain-preventing function and more excellent weathering resistance, can be self-repaired at room temperature within a short time, and has a better protective effect.
Owner:CHANGZHOU SANYOU DISSAN PROTECTIVE MATERIAL MFG

Quick-drying scratch-resistant varnish composition with high solid content as well as preparation method and application of quick-drying scratch-resistant varnish composition

The invention discloses quick-drying scratch-resistant varnish composition with high solid content. The quick-drying scratch-resistant varnish composition comprises varnish and a curing agent in a volume ratio being 2:1, wherein the varnish comprises components in parts by weight as follows: 60-80 parts of acrylic resin, 3-20 parts of polyester resin, 0.4-1 part of a leveling agent, 0.02-0.5 parts of a catalyst, 1-2 parts of an ageing-resistant auxiliary and 10-20 parts of a first solvent; the curing agent comprises components in parts by weight as follows: 60-80 parts of isocyanate and 10-20 parts of a second solvent. The quick-drying scratch-resistant varnish composition with high solid content has quick-drying performance and scratch resistance, further has good paint film property, workability and high construction solid content and is particularly applicable to painting for automobile repairing, and the VOC (volatile organic compounds) can be reduced to 420 g / L or lower.
Owner:NIPPON PAINT CHINA +1

High-performance thermoelectric device and ultrafast fabrication method thereof

The invention discloses a high-performance thermoelectric device and an ultrafast fabrication method thereof. In the high-performance thermoelectric device, a segmented structure is employed to perform optimal matching of a thermoelectric material and a temperature difference environment, a blocking layer and a buffer stress layer are employed to reduce interface element migration and longitudinalcontact thermal expansion stress and improve bonding strength, a phonon scattering layer and a negative thermal expansion buffer layer are embedded to fix a thermoelectric leg so as to improve internal thermal resistance and horizontal thermal matching performance of the high-performance thermoelectric device, internal package and external package are employed to prevent the thermoelectric material from being oxidized and sublimed and improve external collision-resistant capability, the technical bottlenecks of low energy conversion efficiency, small specific power, poor thermal stability, poor collision performance, complicated fabrication process and the like of a traditional thermoelectric device are effectively broken through, meanwhile, the thermal stability and the mechanical structural performance of the high-performance thermoelectric device are improved to a great extent, long-term and excellent electrical output performance is guaranteed, and the working environment is expanded.
Owner:深圳热电新能源科技有限公司

Injectable self-repairing hydrogel based on polysaccharides, preparation method and application of hydrogel to biological tissue engineering

The invention discloses injectable self-repairing hydrogel based on polysaccharides, a preparation method and application of the hydrogel to biological tissue engineering, and belongs to the technical field of high polymer materials. The method includes the steps of modifying natural high polymer chitosan so that the defect that the chitosan can only be dissolved in acid solutions can be overcome and the dissolubility of the chitosan in water can be improved; conducting mixing reaction on the chitosan and a modified sodium hyaluronate derivative solution, delaying the reaction time or raising the temperature so that sol can be converted into gel and hydrogel can be endowed with the injection characteristic and the self-repairing characteristic. It is shown through cell co-culture experiments that the intelligent hydrogel has the advantage of high biocompatibility, degradability and the like. The injectable self-repairing hydrogel as a novel medical high polymer carrier material has potential biological and medical application value when used for the co-culture together with cells, protein, DNA, antigens and other active substances, and even the delivery, release and other aspects of medicine and other in-vitro substances.
Owner:深圳智凝高分子材料科技有限公司

Multifunctional current impulse transmitter and control method

The invention relates to a multifunctional current impulse transmitter and a control method. The transmitter is formed according to the following method: the positive electrode of a two-gear direct current power supply is connected with a depressurization chopping constant-current circuit, a clamping circuit, a short-circuit and bridge arm direct connection protective circuit, a bipolar current impulse generator and a load through a switch K; and the negative electrode of the two-gear direct current power supply is connected with the load through the depressurization chopping constant-current circuit and the bipolar current impulse generator. According to the invention, the two-gear direct current power supply is adopted to coarsely regulate an output voltage; the depressurization chopping constant-current circuit is used so as to precisely regulate the output voltage, thereby reducing the variation range of the duty ratio of the depressurization chopping constant-current circuit and improving efficiency; the clamping circuit can perform bootstrap on a capacitor of a clamping voltage source to generate a high voltage in no need of improving the voltage of a direct current power supply or providing an auxiliary power supply; the linearity and the steepness of the failing edge of the current impulse are changed through regulating the voltage of the linear clamping voltage source; and the short-circuit and bridge arm direct connection protective circuit is matched with an impulse controller, so that the circuit has a self-repairing function after a failure is removed.
Owner:JILIN UNIV

Self-healing polyanion-chitosan quaternary ammonium salt hydrogel and use thereof

ActiveCN106467613AWith self-healing functionNo need for external stimuliSelf-healingBiocompatibility Testing
The invention discloses self-healing polyanion-chitosan quaternary ammonium salt hydrogel and its use in the field of pharmaceutical biology. A preparation method of the hydrogel comprises respectively preparing a polyanionic solution and a chitosan quaternary ammonium salt solution, fully mixing the solutions so that the solutions are spontaneously aggregated under electrostatic interaction and undergo a gelation reaction, and collecting solid precipitates so that the polyanion-chitosan quaternary ammonium salt hydrogel is obtained. The hydrogel raw materials have wide sources and low prices. The hydrogel has good biocompatibility and has self-healing properties and in the process of formation, an organic solvent and acid-base environments are avoided so that the above properties lay the foundation for use of the hydrogel in the field of biomedicines. The hydrogel can be used for drug and protein positioning delivery and has injectability and high adhesion. When being used in tissue regeneration scaffolds, the hydrogel has the advantages of mild preparation condition, controllable shape and high water content, and is a good extracellular matrix material.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI

Reaction-type flame-retardant epoxy resin microcapsule and preparation method thereof

The invention discloses a reaction-type flame-retardant epoxy resin microcapsule. The reaction-type flame-retardant epoxy resin microcapsule comprises a capsule core and a capsule wall, wherein the capsule core is 30 to 70 percent by mass of phosphorus-containing epoxy resin, and the capsule wall consists of the following ingredients by mass percent: 15 to 55 percent of phosphorus-containing acrylate, 15 to 45 percent of epoxy acrylate, 10 to 50 percent of a polymerizable emulsifier, 0.5 to 3 percent of an acrylate crosslink agent and 0.1 to 0.5 percent of a photoinitiator. The invention also discloses a method for preparing the microcapsule. The microcapsule has the following advantages that the flame resistance and self-repairing function are good, so that the microcapsule can be widely applied to the fields such as thermosetting self-repairing resin-based composite materials and coatings. The method for preparing the microcapsule adopts an ultraviolet interface in-situ polymerization method, so that not only is the process simple and less time consumed, but also the method is controllable, the safety of the prepared composite material can be improved, and the service life of the composite material can be prolonged.
Owner:广东润昌南星新材料有限公司

Method for converting packet mode data from high-bit width format to low-bit width format using frame alignment

The invention discloses a method for realizing the format conversion of the package mode data from the higher bit wide to the lower bit wide using the frame positioning, characterized by that the method comprises, (1) conducting super-long package detection for the input package, processing the packages exceeding the preset package length into the standard package, (2) adding the package length information of the status signal of the input packages to transform them into the frame header of the lower bit wide, and storing it in the previous address of the data package header, (3) by performing frame header positioning to the lower bit wide data, recovering them into the higher bit wide data having the status information. The invention has the advantage of saving storage resource, convenient format conversion and having self-curing function.
Owner:HUAWEI TECH CO LTD

Conductive ink composition with self-repair functions, method for preparing conductive ink composition and application thereof

The invention discloses a conductive ink composition with self-repair functions, a method for preparing the conductive ink composition and application thereof. The method includes steps of stirring and heating polyester or polyether glycol until the temperature of the polyester or polyether glycol reaches 80-100 DEG C, dehydrating the polyester or polyether glycol under the condition of the vacuum degree lower than 0.1 MPa for 0.5-3 h, cooling the polyester or polyether glycol until the temperature of the polyester or polyether glycol reaches 50 DEG C, adding polyisocyanate and polar solvents into the polyester or polyether glycol, carrying out stirring reaction at the temperatures of 60-120 DEG C for 2-14 h and cooling first reaction products until the temperatures of the first reaction products reach 50 DEG C; adding chain extenders with disulfide bonds, hyperbranched structures and active hydrogen atoms into the first reaction products, continuing to carry out reaction at the temperatures of 60-120 DEG C for 2-14 h, uniformly mixing second reaction products and organic silver salt solution with one another and carrying out reduced pressure distillation to obtain the conductive ink composition with the self-repair functions. The conductive ink composition with the self-repair functions, the method and the application have the advantages that self-repair can be carried out under heating and UV (ultraviolet) light illumination conditions, the conductive ink composition is free of mixed particles, the solid content of silver can be obviously increased, and the uniformity of ink can be obviously improved; the conductive ink can be used for writing on base materials such as paper, glass and plastics in writing brush and silk-screen printing modes and the like, and the conductive ink composition is excellent in conductivity by means of formaldehyde solution reduction and is suitable for flexible circuits.
Owner:UNIV OF JINAN

Single-ion polymer electrolyte system as well as preparation method and application thereof

The invention belongs to the related field of polymer electrolyte systems. The invention discloses a single-ion polymer electrolyte system as well as a preparation method and application thereof. Thesingle-ion polymer electrolyte system is composed of a single-ion polymer electrolyte and a metal salt, wherein the single-ion polymer electrolyte is obtained by carrying out reversible addition-fragmentation chain transfer polymerization reaction on three monomers including a single-ion conductor lithium salt containing a p-styrenesulfonyl group, UPyMA containing quadruple hydrogen bonds and methoxypolyethylene glycol methacrylate. According to the invention, the key structure and related composition in the single-ion polymer electrolyte system, the overall process flow of the preparation method and other aspects are optimally designed; and, compared with the prior art, the invention is advantageous in that not only can the phenomenon that a polymer electrolyte system is easy to crack bebetter solved, but also the metal ion transference number and the ionic conductivity can be remarkably improved, and meanwhile, the growth of metal dendrites is effectively inhibited, so that the polymer electrolyte is particularly suitable for the field of metal ion batteries such as lithium ion batteries.
Owner:HUAZHONG UNIV OF SCI & TECH
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