247 results about "Self-healing material" patented technology

A self-healing material comprises a matrix embedded with micro-pockets of a healing-agent releasable by a crack in the matrix. The healing-agent is able to bond to the matrix to repair the crack. The healing-agent is contained in microcapsules. A corresponding catalyst for the healing-agent is embedded in the matrix and contained in a plurality of microcapsules as an emulsion. The emulsion comprises an oil, a perfluorated solvent, a hydrophobic ionic liquid, or mixtures thereof. A method of manufacturing the self-healing material comprises the steps of identifying an operational temperature range of the material, providing at least one substance as the healing-agent, which substance remaining substantially in a liquid state within the operational temperature range, identifying an operational evaporation rate of the healing-agent and providing the substance with a curing time according to the evaporation rate.

The invention discloses a dynamic polymer having a hybrid cross-linked network, and contains common covalent crosslinking and dynamic covalent crosslinking; and the dynamic covalent crosslinking is realized by organic boric acid silicon ester bonds. The dynamic polymer combines the advantages of dynamic covalent organic boric acid silicon ester bonds and a common covalent bond, and by regulation and control of a reactant structure, a dynamic polymer having abundant structure and various properties can be prepared. The dynamic covalent crosslinking in the dynamic polymer has strong dynamic reversibility, the polymer can present function characteristics of stimulation responsiveness and self-repair performance, and the common covalent crosslinking endows certain intensity and stability to the polymer; in addition, the dynamic nature of the organic organic boric acid silicon ester bonds can generate good energy dissipation and energy-absorbing effect, and is capable of toughening, dampingand resisting impact on a material in a specific structure. The dynamic polymer can be used for preparing a shock-absorption material, a shock-resistant protection material, a self-repair material, and a toughness material.

The invention discloses a self-healing polymer material and a preparation method thereof. The self-healing polymer material comprises at least one polyurethane polymer prepared by random copolymerization reaction of a low polymer dihydric alcohol, a chain extender and a first diisocyanate, wherein the chain extender comprises at least one multiple hydrogen bond chain extender. The invention further provides a preparation method of the self-healing polymer material. The method comprises the following steps: preparing a ureido pyrimidone type end-capping reagent or chain extender, and preparing the low-temperature rapid self-healing polymer material containing quadruple hydrogen bond groups on side chains and end groups by utilizing the random copolymerization reaction of the low polymer diglycol, the chain extender and the first diisocyanate. Compared with the traditional self-healing material, the self-healing material disclosed by the invention can realize repeated self-healing at the same position at a low temperature without adding a repair agent to the damaged part, and the self-healing polymer material is high in healing ability, excellent in mechanical property, excellent in material film-forming property and transparency, simple in process and low in cost.

There is provided a flexible display device including a display panel for displaying an image, and a window substrate covering the touch screen panel, the widow substrate including a flexible base layer including an externally facing first surface, and a second surface opposite the first surface and facing the display panel, a hard coating layer having a hardness that is larger than that of the base layer, and including a plurality of coating tiles on the first surface of the base layer that are spaced to have a gap between adjacent ones of the coating tiles, and a self-healing coating layer including a self-healing material and covering the hard coating layer on the base layer.

The invention discloses a dynamic polymer with a dynamic cross-linked structure. Organic boric acid silicon ester bonds are contained on polymer chain skeletons of a cross-linked network and/or on cross-linked link skeletons between polymer chains, wherein the organic boric acid silicon ester bonds are necessary for forming/maintaining a dynamic polymer structure. The dynamic polymer is rich in structure and diverse in properties. By regulating and controlling the structure of a reactant, the dynamic polymers with different properties can be prepared. In addition, due to strong dynamic reversibility of the organic boric acid silicon ester bonds in the polymer, the polymer can exhibit functional characteristics of stimulus responsiveness, self-healing property, recoverability and the like; and besides, due to the presence of the organic boric acid silicon ester bonds, the polymer can also have the energy absorbing effects, and polymer materials can be toughened in a given structure. The dynamic polymer can be used for making shock-absorption cushioning materials, impact-resistance protection materials, self-healing materials, ductile materials and the like.

The invention relates to a micro-encapsulated self-repairing polymerizable composition that comprises at least one selected polymerizable compound to be integrated into organic, inorganic or composite materials for the self-repairing of damages incurred in the use conditions thereof, characterised in that micro-encapsulated polymerizable composition is integrated alone into said materials and, after the release of the microcapsule and in the absence of a catalyst, spontaneously polymerises in the presence of a polymerisation-triggering agent that is absent in said materials but naturally occurs during the use thereof, thus repairing said damages.

The invention relates to the technical field of self-repairing anticorrosive paints and particularly relates to a self-repairing microcapsule used for a metal anticorrosive paint and a preparation method of the self-repairing microcapsule. The self-repairing microcapsule sequentially comprises a capsule core material and double layers of wall materials from inside to outside, a corrosion-inhibiting material is loaded between the double layers of wall materials, a coupling reagent is adhered on an outer wall of the double layers of wall materials, wherein the capsule core material is a reactant of a polyhydroxyl or multiamino compound and isocyanate, an inner wall of the double layers of wall materials is polyurethane, the outer wall of the double layers of wall materials is melamine formaldehyde resin, and the corrosion-inhibiting material is a nanoparticle and a metal corrosion inhibitor. The microcapsule is high in repairing efficiency, stable in mechanical property and simple in process, is matched with a matrix, has extensive applications, and can be widely applied to the fields of metal anti-corrosion and self-repairing materials like the petrochemical engineering, the marine industry and the automobile industry.

The present invention is directed to self-healing materials and use thereof for extending the lifespan of a tire. The self-healing material includes a rubber healing agent, e.g., sulfur, encapsulated by a coating material, e.g., polypropylene, defining a microcapsule. The self-healing materials are processed with rubbery polymers to provide a rubber compound suitable for use in a tire. The microcapsule coating material is selected to prevent release of the healing agent during the processing steps of the rubber compound, such as can occur through melting or softening of the coating material, and to release the healing agent, e.g., via melting or softening, at a desired temperature greater than a tire's running temperature. Release of the healing agent can help repair damage to local polymeric structure, such as broken cross-links, by reacting with the surrounding rubber. In this way, that area of the rubber compound can be reinforced, thereby prolonging the life of the tire.

The invention discloses applications of multi-component super-molecule hydrogel as a stress response material and a self-healing material. The hydrogel consists of a component with a strong hydrogen bond, a component with a weak hydrogen bond and water, wherein the component with the strong hydrogen bond is one or more of a carbon oxide nano tube, graphene oxide, carboxylic ferroferric oxide nano particles, carboxylic silver nano particles, carboxylic quantum dots, polyacrylic acid, polypropylene glycol, polyurethane, polyamide and poly(sodium-p-styrenesulfonate); and the component with the weak hydrogen bond is a small molecule compound or a macromolecular compound. The hydrogel provided by the invention simultaneously has multiple response and self-healing functions, and environment-dependent reversible adhesion behavior, and can be importantly applied to the fields of sensors, actuators, drug controlled release, self-healing materials, photo-thermal therapy, movable smart adhesion agents and artificial joints.

The invention relates to fluorosilicone resin based on click chemistry and a preparation method of a self-repairing superhydrophobic coating. Through click chemistry, low surface energy and a self-repairing function are led into a multi-level rough structure of nanoparticles fixed by a polyurethane adhesive, and the superhydrophobic/amphiphobic interfacial material with high mechanical strength and the self-repairing function is prepared. As a self-designed low-surface-energy segmental grid structure of polyfunctional fluoroalkyl silane is adopted, by use of the principle that a damaged surface is covered with self-repairing segmental orientation, the defects that low-surface-energy molecules in a conventional self-repairing material are long in migration time and high in probability of loss are overcome, and a new method is provided for realizing quick and long-acting self-repairing of the superhydrophobic coating.

The invention discloses a self-healing organic matter/inorganic nanoparticle hybrid material and a preparation method thereof. The basic contents are as follows: the organic matters and nanoparticles in the hybrid material are respectively modified by the host group and guest group and are connected together under the inclusion acting force of the host and guest. After the material is damaged, the damaged interface can generate abundant free host and guest groups, and the strong inclusion interacting force between the host and guest groups can promote the healing restoration of the material. Abundant inorganic nanoparticles are introduced into the system under the inclusion action of the host and guest, and the uniformly dispersed nanoparticles can generate an enhancement effect on the material to improve the mechanical strength of the material. The hybrid self-healing material disclosed by the invention has wide application prospects in the fields of bionics, biomedicine, electronics, daily chemical industry, even military affairs, national defense and the like.

The invention belongs to the technical field of macromolecular biological materials, and provides a macromolecular composite self-healing hydrogel based on a molybdenum disulfide nanosheet and a preparation method thereof. The macromolecular composite self-healing hydrogel is prepared by performing photo-initiation clicking reaction in a molybdenum disulfide nanosheet water solution; the clicking reaction is generated by unsaturated double bonds in methacrylic anhydride gelatin and sulfydryl in four-branched sulfydryl polyvinyl alcohol under the radiation action of ultraviolet light. The self-healing property is realized by the material utilizing the photo-thermal conversion characteristic of the molybdenum disulfide nanosheet to heat the hydrogel under the radiation action of near-infrared light. The macromolecular composite self-healing hydrogel has the advantages that the nanometer two-dimensional material, namely the molybdenum disulfide nanosheet, is applied into the field of self-healing materials, and the quick healing characteristic of the material under the light stimulation condition is realized.

A disclosed preparation method for an epoxy microcapsule by taking polyurethane as a wall material mainly comprises the following steps: preparing an isocyanate-terminated polyurethane prepolymer; mixing the isocyanate- terminated polyurethane prepolymer with epoxy resin, adding an emulsifier and water, stirring and performing an emulsification reaction to prepare an oil-in-water emulsion; heating and performing an interface reaction to form a capsule wall; and filtering, rinsing the precipitate with water and drying to obtain the microcapsule by taking polyurethane as the wall material and taking epoxy resin as the core material. The prepared epoxy microcapsule by taking polyurethane as the wall material is good in epoxy microcapsule sphericility, smooth in surface and uniform in wall thickness, and is applicable to prepare microcapsule type self-repair materials.

The invention relates to an olefinic carbon compound nanometer soft metal wear-resistant self-repairing material with surface modification, and a preparation method thereof. A nanometer olefinic carbon material with wear-resistant performance and a nanometer metal material with an abrasion repairing function are subjected to in-situ composite preparation with a sol-gel method, so that the materialhas dual functions of abrasion resistance and reduction and abrasion self-repairing, and the advantage complementation mechanism of the synergetic effect and the performance of different types of nanometer materials is performed. The olefinic carbon compound nanometer soft metal wear-resistant self-repairing material prepared with the preparation method can be used for realizing the breakthroughof 'exponential increase of wearing resistance under extreme pressure', 'zero abrasion of metal friction' under an extreme pressure situation is broken through, true super lubrication under the extreme pressure situation is realized, traditional sulfur-phosphorus-containing liquid lubrication performance and application technologies are subjected to revolutionary changes due to the occurrence of olefinic carbon compound wear-resistant energy-saving materials, the material does not contain caustic organic sulfur and phosphorus compound, wear-resistant performance is improved, and wear reductionenergy saving performance is also improved.

A device, providing enlargement and preventing collapse, of the pupil of the eye, during an ophthalmic surgical procedure. The device made of resiliently flexible material and configured as a ring, comprises plurality of notches at corners and flanges at sides. Notches engage the pupillary margin at different parts, pushing them apart, causing enlargement of the pupil. Consecutive flanges lie above and below the iris and bend the pupillary margin at the notches. The enlarged pupil allows a wide view of the structures deeper to the pupillary plane, previously obscured due to a small pupil. When the ring is manually expandable or self-expandable it is made of a combination of shape retaining and shape memory material that is selected from the group consisting of a self-enlarging material, a self-healing material, a self-reconfiguring programmable material, a biodegradable material, and/or drug-eluting material.

The invention belongs to the fields of mechanical engineering technology, self-repairing materials and lubricant preparation technology and relates to a lubricant additive of a self-repairing material which has a self-repairing function and is applied for repairing worn metal surfaces in situ during the friction wearing process of metals. The lubricant additive consists of serpentine, quartzite powder and a surface activator; the surface activator is 0.005 percent of the weight of the serpentine and quartzite powder; the powder is added into the lubricant for obtaining lubricant comprising a compound additive. The lubricant additive forms a self-repairing film layer on the worn metal surface for leading the surface of a metal friction pair to be ultra-hard and ultra-smooth with extremely small friction coefficients for playing the roles of wearing resistance and friction reduction, greatly improving the contact condition of the friction pair as well as improving the service life of a machine part. Moreover, the lubricant additive is nontoxic, belongs to an environmental friendly material, has a simple preparation technique and a conveniently operated surface decoration technique and is suitable for the industry production and application in large scale.

The invention relates to a bionic self-healing material for air leakage stoppage in a coal mine. The bionic self-healing material comprises a fast-setting expanding material, microcapsules containing a healing agent, and a catalyst, wherein the fast-setting expanding material comprises several of a cement clinker, coal ash, steel slag, mountain flour, salty mud, carbide slag, an expanding agent, a water reducing agent and sand, and each microcapsule is composed of a wall material (polymer resin) and a core material (the healing agent); the wall material of each microcapsule is at least one of urea resin, melamino-formaldehyde resin, melamine urea-formaldehyde resin and polyurethane, the healing agent is at least one of olefins containing double bonds, such as polyurethane prepolymer, isocyanate, phenolic resin, epoxy resin, styrene, acrylics and dicyclopentadiene (DCPD), and the catalyst is at least one of Grubbs catalyst, dibutyltin dilaurate and amines. The bionic self-healing material for air leakage stoppage in the coal mine disclosed by the invention has the advantages of being automatic in detection and healing, moderate in expansion, fast to set, good in conveying performance, strong in setting performance, green and environmentally friendly, and low in price.

The invention provides application of a self-repair material in 3D printing. The self-repair material is taken as a 3D printing material, the self-repair function of the self-repair material is utilized, and the material is intelligently detected and is spontaneously repaired, so that potential damage of the self-repair material caused by generated micro-cracks can be prevented; compared with molding conditions of a product, self-repair needs the light and mild conditions, from the beginning to finishing of the self-repair, the whole performance of the product cannot be affected, the maintenance cost for the product is decreased, the service life of the product is prolonged, and the resource utilization rate is increased.

The invention discloses a self-repairing solid-state hybrid dynamic polymer. The self-repairing solid-state hybrid dynamic polymer contains sulfydryl-Michael addition bond dynamic covalent crosslinking and supermolecular hydrogen bond interaction, wherein the sulfydryl-Michael addition bond dynamic covalent crosslinking reaches above a gel point in at least one crosslinking network; sulfydryl-Michael addition bonds are obtained through sulfydryl-Michael addition reaction between sulfydryl groups and electron-deficient conjugate alkenes/enynes; the supermolecular hydrogen bond interaction contains hydrogen bond interaction involving at least one from side hydrogen bond groups, backbone hydrogen bond groups and other end hydrogen bond groups; with dynamic reversibility, the sulfydryl-Michaeladdition bonds and the supermolecular hydrogen bonds endow the self-repairing solid-state hybrid dynamic polymer with good plasticity, self-repairability, repeatability, reusability and recoverability and ensure that the self-repairing solid-state hybrid dynamic polymer can be widely applied to self-repairing materials, flexible materials, shape memory materials, energy storage device materials and the like.

The invention belongs to the technical field of polymer composite materials and functional materials, and in particular relates to a proton exchange membrane having the self-repairing capability and a preparation method thereof. The proton exchange membrane disclosed by the invention is mainly composed of two components including a self-repairing material and a proton conducting material, wherein the self-repairing material comprises, but not limited to, polyvinyl alcohol, chitosan, a poly(vinyl furfural)/bismaleimide cross-linked polymer and the like; and the proton conducting material comprises, but not limited to, phosphoric acid, sulphuric acid, sulfosuccinic acid, sulfomalic acid, perfluorinated sulfonic acid resin, sulfonated polybenzimidazole, sulfonated polyether-ether-ketone, sulfonated polyimide and the like. The two components form the membrane by using the existing process after being composited through the methods, such as a blending method, a copolymerizing method and an interpenetrating polymer network method; the membrane has good proton conducting capability and self-repairing capability; after the membrane is damaged, self-repairing can be realized under the excitations of water infiltration, temperature increasing/decreasing circulation and the like; therefore, the service life of the proton exchange membrane is prolonged; the use range of the proton exchange membrane is enlarged; and the proton exchange membrane disclosed by the invention can be used in the fields of fuel cells, ion exchange, catalysts and the like.

The invention relates to the technical field of a self-repair material, and provides a microcapsule for a self-repair material with phenolic resin as a wall material. The wall material of the microcapsule is cross-linked and solidified phenolic resin; a core material is dicyclopentadiene. The invention also provides a preparation method of the microcapsule for the self-repair material with phenolic resin as the wall material. The preparation method comprises the following steps of: preparing thermosetting resin to obtain reaction liquid; preparing core material emulsion; mixing the core material emulsion with the reaction liquid at 60-65 DEG C to obtain mixing solution; adjusting the pH value of the mixing solution to 2.5-1; heating to 70-80 DEG C; reacting for 1.5-2hours; heating to 85-90 DEG C; reacting for 1.5-2 hours, so as to obtain microcapsule sediments; and filtering and drying at 40-60 DEG C, so as to obtain the microcapsule for the self-repair material with phenolic resin as the wall material.

The invention discloses a dynamic polymer with a hybrid cross-linked network structure. The dynamic polymer contains dynamic covalent bond crosslinking and supermolecular hydrogen bond crosslinking, wherein the dynamic covalent bond crosslinking is realized by associative exchangeable covalent bonds, and the supermolecular hydrogen bond crosslinking is realized by hydrogen bond groups on the sidegroups and/or side chains of a polymer chain framework and hydrogen bond groups on the optional chain frameworks. The polymer integrates dynamic characteristics of a supermolecule and dynamic covalentcharacteristics of glass-like matter; supermolecular hydrogen bonds give stimulative responsibility, energy dissipation performance and self-repairing performance to the material; the associative exchangeable covalent bonds give structural stability and mechanical strength to the covalent cross-linked polymer, and because the associative exchangeable covalent bonds have dynamic reversibility, thepolymer has self-repairing performance, recycling performance, reproducibility and the like. According to the invention, the dynamic polymer with the hybrid cross-linked network structure can be widely applied to vibration-absorptive cushioning materials, impact-resistant protective materials, self-repairing materials, toughness materials, sealing elements and the like.