247 results about "Adhesive system" patented technology

The invention discloses an acrylate conductive composite pressure-sensitive adhesive and a preparation method thereof. The acrylate conductive composite pressure-sensitive adhesive comprises a raw material A and a raw material B, wherein the raw material A comprises 5-15 parts of acrylate polymer; 0.10 to 1.00 parts of epoxy resin; 1.0 to 10.0 parts of aniline; 0.1 to 1.0 part of an initiator; 1-5 parts of conductive particles; and 0.010 to 0.100 part of an amine curing agent. The acrylate conductive composite pressure-sensitive adhesive disclosed by the invention has excellent conductivity and capacitance sensing performance, and shows excellent capacitance stability and relatively high sensitivity in a pressure cycle test; on the basis of containing the conductive filler, the pressure-sensitive adhesive still has better hardness, adhesion strength and tensile strength, and the conductive filler is well dispersed and combined in a pressure-sensitive adhesive system.

A primer composition includes solvent, electrically conductive filler dispersed in the solvent, and a polymer at least one of dissolved or dispersed in the solvent. The polymer includes at least one of a polyurethane, polyacrylate, a polyamide, or a rubber. An adhesive system includes the electrically conductive composition and an electrically debonding adhesive including an ionic liquid. The use of the primer composition as a primer on an electrically nonconductive substrate in combination with an electrically debonding adhesive is also described. A method of making a bonded article and an article bonded with the adhesive system disclosed herein and / or made by the method disclosed herein are also described.

The invention relates to the technical field of heat-resistant materials, in particular to a preparation method of a basalt fiber SiO2 aerogel composite heat-insulating material. The preparation method of the basalt fiber SiO2 aerogel composite thermal insulation material comprises the following steps: S1, preparing chopped basalt fibers into a basalt fiber skeleton preform with a certain mechanical property; s2, preparing SiO2 sol; and S3, putting the fiber skeleton into the prepared SiO2 sol, aging, modifying, and drying in stages to obtain the basalt fiber SiO2 aerogel composite material. The material prepared by the method takes the basalt fibers as a reinforced matrix, the cost of the composite material can be reduced, mass production, popularization and application are facilitated, the basalt fiber porous material is prepared by adopting a method of combining gel casting with freeze drying, and the basalt short fibers are bonded by using a silica sol-agarose composite adhesive system, so that the composite material is prepared. The mechanical property of the composite material is improved.

The invention relates to the field of building structure adhesives, and discloses a low-temperature double-component epoxy adhesive system for a wind power mixing tower and a preparation method of the low-temperature double-component epoxy adhesive system. The system comprises an epoxy resin component (A) and a curing agent component (B) in a weight ratio of (1.5-2.2): 1, wherein the epoxy resin component (A) contains 80-150 parts by weight of epoxy resin (a1), 5-15 parts by weight of a diluent (a2), 3-8 parts by weight of a thixotropic agent (a3) and 150-300 parts by weight of a filler I (a4); wherein the curing agent component (B) contains 50-200 parts by weight of a curing agent (b1) and 100-300 parts by weight of a filler II (b2). The adhesive system is used for vertical and horizontal bonding construction of wind power concrete tower tube segments in the environment of-15 DEG C to 5 DEG C, and is convenient to apply, high in sagging resistance, good in thixotropy, high in curing speed and high in compression strength after curing.

The invention relates to the technical field of building materials, and particularly discloses an efficient and energy-saving building thermal insulation material and a preparation method. The material is prepared from modified aerogel, composite mineral fibers, phase change energy storage microcapsules, nano silicon dioxide, waterborne epoxy resin, a polyamide curing agent, expanded perlite, hollow glass beads, hydroxypropyl methyl cellulose, amino modified polyurethane microspheres and nano boron nitride, and the functions of all the components are complemented to form a synergistic system. The preparation method sequentially comprises the following steps: pretreatment of the composite mineral fibers, activation of the amino modified polyurethane microspheres, synergistic dispersion of multiple components, preparation of a bonding system, gradient mixing of materials and molding post-treatment. The material can be widely applied to heat preservation and insulation scenes such as building outer walls and roofs, and has the core advantages of being excellent in heat preservation and insulation, stable in mechanical strength and reliable in long-acting performance; the preparation method disclosed by the invention is refined in process, controllable in parameters, high in repeatability, capable of ensuring uniform product performance and beneficial to industrial large-scale production.

The invention relates to the technical field of adhesives, in particular to a starch adhesive for artificial boards and a preparation method of the starch adhesive, and the starch adhesive comprises the following components in parts by weight: 100 parts of modified konjac starch, 15-25 parts of polyvinyl alcohol, 8-12 parts of polyacrylate, 0.1-0.3 part of a preservative, 3-6 parts of epoxy chloropropane, 0.5-1.0 part of a viscosity stabilizer, 2-4 parts of a modified rare earth compound and 180-220 parts of water. According to the invention, a composite adhesive system of'modified starch matrix + chemical cross-linked network + rare earth coordination interface 'is constructed, so that the water resistance and the bonding strength can be obviously improved; meanwhile, the formaldehyde emission is zero, the problem of formaldehyde pollution of urea-formaldehyde resin, phenolic resin and other traditional adhesives is avoided, and an adhesive solution with high performance and environment-friendly characteristics is provided for the artificial board industry.

The present invention relates to the technical field of structural adhesives, and provides a high-stability low-exothermic structural adhesive system material, a preparation method therefor and a use thereof. The mass ratio of a resin component to a curing agent component in the structural adhesive system material is 10:(4-5). The resin component comprises 60-80 parts of bisphenol-A epoxy resin, 2-15 parts of bisphenol-F epoxy resin, 10-20 parts of an inorganic reinforcing filler, and 3-8 parts of a thickening thixotropic agent. The curing agent component comprises 56-115 parts of an amine curing agent, 5-20 parts of an inorganic reinforcing filler, 5-9 parts of a thickening thixotropic agent, and 4-60 parts of a modified amine-based rheology additive. The modified amine-based rheology additive is obtained by means of a pre-reaction, at a temperature of 25-150ºC, between an amine substance and a substance capable of undergoing an addition reaction with the amine substance. The present invention solves the problems of how to improve the stability of the structural adhesive and ensure smooth and uniform heat release during a curing exothermic process while meeting mechanical performance requirements.

Curable adhesive free-standing films and adhesive systems comprising such films are provided. In some embodiments, a curable adhesive free-standing film comprises a blend of: a) a first film-forming polymer or oligomer; b) a first species comprising first unsaturated free-radically polymerizable groups, which may be a) or a species other than a); c) a first transition metal cation; d) a reducing agent; and no oxidizing agent. In some embodiments, an adhesive system comprises: I) a first curable adhesive free-standing film as described preceding; and II) a second curable adhesive free-standing film comprising a blend of: e) a second film-forming polymer or oligomer; f) a second species comprising second unsaturated free-radically polymerizable groups, which may be e) or may be a species other than e); and g) an oxidizing agent. In some embodiments, the curable adhesive free-standing films may be pressure sensitive adhesives prior to cure. Methods of use are provided.

According to the cationic UV-LED and moisture dual-curing three-proofing adhesive provided by the invention, on the basis of original UV-LED curing, moisture curing is introduced as a synergistic curing mechanism, a UV-LED moisture dual-curing three-proofing adhesive system is jointly formed by combining modified dual-curing resin, an epoxy active diluent, a cationic photoinitiator, an auxiliary agent and the like, an oxygen inhibition effect does not exist, and the moisture dual-curing three-proofing adhesive has the advantages that the moisture dual-curing three-proofing adhesive has a good curing effect; under the adhesive film thickness of 50-200 microns, the cured surface is dry and comfortable and does not adhere to dust or other impurities, the defect that the surface of a traditional mercury lamp curing type UV three-proofing adhesive adheres to hands when an LED lamp is cured is overcome, the curing process is low in energy consumption, electricity is saved, the three-proofing adhesive can be used instantly after being opened, damage to heat-sensitive devices is effectively avoided, no ozone is generated in the whole process, and the three-proofing adhesive is environmentally friendly and safe.

The present application discloses a glue sticking device and a glue sticking system, the glue sticking device comprises: at least two glue preparation devices, at least two glue preparation devices can work independently and are arranged along a first direction, each glue preparation device comprises a glue sticking station for accommodating a battery cell; a glue sticking device, at least part of the glue sticking device can move between at least two glue sticking stations along a first direction, each glue preparation device is used to provide glue to the glue sticking device, and the glue sticking device sticks the glue to the battery cell in the corresponding glue sticking station. The glue sticking device provided in the embodiment of the present application is equipped with at least two glue preparation devices for the glue sticking device, at least two glue preparation devices can alternately provide cut glue to the glue sticking device, the glue sticking device can switch between the glue sticking stations of each glue preparation device and complete the glue sticking operation on the battery cell, thereby improving the working rhythm of the glue sticking device and the working efficiency of the glue sticking device.

The invention discloses an ultraviolet curing organic silicon conductive adhesive and a preparation method thereof, and relates to the technical field of conductive materials, the ultraviolet curing organic silicon conductive adhesive comprises the specific components of organic silicon matrix resin, a photosensitive curing agent, a conductive filler, a reactive diluent, a coupling agent and a thixotropic agent; the photosensitizer further comprises carborane cluster particles, a phosphazene silane nanocage, a sulfur-doped tungstate nanosheet, a potassium fluoride modified hollow graphene ball and an additive of a germanoxane photosensitizer. The material is prepared based on the materials. According to the preparation method, multiple functional additives are introduced into a traditional ultraviolet curing organic silicon conductive adhesive system, a multi-dimensional conductive path is constructed on the molecular and nanoscale, and the photocuring initiation efficiency and the interface stability are optimized, so that the prepared conductive adhesive not only realizes low resistivity, but also can be rapidly and deeply cured in an adhesive layer with relatively high thickness; and meanwhile, excellent damp-heat resistance and corrosion resistance are achieved.

An adhesive film includes a first (meth)acrylate copolymer containing at least 55 weight percent (wt. %) of linear or branched alkyl (meth)acrylate monomer units, from 15 to 40 wt. % of (meth)acrylic acid monomer units, and 0.1 to 5 wt. % of monomer units of a crosslinking monomer having more than one (meth)acrylate group. If the first (meth)acrylate copolymer comprises 15 wt. % (meth)acrylic acid monomer units, the first (meth)acrylate copolymer comprises at least five wt. % monomer units of a high Tg monomer. The adhesive film comprises not more than five wt. % of a further (meth)acrylate copolymer comprising from 0.1 to 15 wt. % of (meth)acrylic acid monomer units. The adhesive film can be a multilayer adhesive assembly including a first layer of the first (meth)acrylate copolymer and a second adhesive layer adjacent to the first layer. A process for making and a system including the adhesive film and a primer are also described.

The invention provides a binder system for beryllium-titanium alloy powder injection molding and application, and relates to the technical field of metal powder injection molding. The adhesive system consists of the following components in percentage by weight: 76 to 84 percent of polyformaldehyde, 7 to 9 percent of high-density polyethylene, 5 to 7 percent of ethylene-vinyl acetate copolymer, 3 to 5 percent of paraffin, 0.1 to 0.5 percent of stearic acid, 0.1 to 1.5 percent of polyethylene glycol and 0.1 to 1 percent of BASF antioxidant. The feed preparation method based on the system comprises the steps of powder pretreatment, binder preparation, banburying mixing and cooling granulation, and uniform coating and dispersion of beryllium-titanium powder can be achieved. According to the system, the problems that in beryllium-titanium alloy injection molding, powder is prone to oxidation, poor in fluidity and low in size precision are solved, the viscosity of the prepared feed at 180 DEG C is 88-101 Pa.S, and the oxygen content is smaller than or equal to 0.24 wt%; the relative density of a finished product is larger than or equal to 96.5%, the size precision is + / -1% / in-+ / -2% / in, and the method is suitable for industrial production of beryllium-titanium alloy complex parts in the fields of spaceflight and nuclear energy.

The invention discloses a single-component isocyanate Pickering emulsion adhesive with long pot life as well as a preparation method and a use method thereof, and belongs to the technical field of high polymer materials / adhesives. The invention aims to solve the problems of low artificial board production efficiency, unstable board bonding performance and difficulty in direct application of a lignin body to a reverse isocyanate emulsion adhesive system due to short adhesive preparation pot life and dependence on environmental humidity in curing of an existing isocyanate adhesive. The single-component isocyanate Pickering emulsion adhesive with the long pot life is prepared from isocyanate, water, lignin sphere nanoparticles and a surfactant. The invention further discloses a preparation method of the single-component isocyanate Pickering emulsion adhesive with the long pot life. The preparation method comprises the following steps: 1, mixing; and 2, emulsifying. The application method comprises the following steps: coating the surface of a base material with the single-component isocyanate Pickering emulsion adhesive, and then assembling and hot-pressing. The invention is used for the single-component isocyanate Pickering emulsion adhesive with the long pot life as well as the preparation and the use of the single-component isocyanate Pickering emulsion adhesive.

The present invention provides a PUR hot melt adhesive for textile use and a preparation method thereof, wherein the adhesive comprises the following components in parts by weight: 88-102 parts of a polyurethane prepolymer, 10-20 parts of a hydroxy acrylate, 6.5-10 parts of a chain extender, 3-9 parts of a light-activated latent curing agent, 8-11 parts of a plasticizer, 1-2.8 parts of a cross-linking agent, 3-6 parts of a tackifier, 0.1-1 parts of a stabilizer, 0.01-0.03 parts of dibutyltin dilaurate, 1.3-2.2 parts of a photoinitiator, and 0.5-0.8 parts of a magnetic medium type absorbent; the polyurethane prepolymer is prepared by reacting a polyester polyol or a polyether polyol with a diisocyanate. The chain extender, the magnetic medium type absorbent, the plasticizer, the cross-linking agent, the tackifier, the stabilizer, and the photoinitiator are all selected from specific components or mixtures. The preparation method comprises generating a polyurethane prepolymer, preparing a polyurethane elastomer, forming a stable adhesive system, and finally preparing a PUR hot melt adhesive. The adhesive has good bonding properties and water-resistant properties and is suitable for the lamination of textile fabrics.

A tape includes a curable adhesive film, which includes a polymer blend including a (meth)acrylate copolymer and a nitrogen-containing polymer, unsaturated free-radically polymerizable groups, which may be bonded to the (meth)acrylate copolymer or in a species other than the (meth)acrylate copolymer, and a transition metal cation. The (meth)acrylate copolymer comprises acidic monomer units. An adhesive system includes the tape and an activator composition including an oxidizing agent. A method of bonding a first substrate includes applying an activator composition onto a surface of the first substrate and contacting the activator composition with a first surface of the tape. The activator composition includes an oxidizing agent.

The invention belongs to the technical field of binders, and provides a water-based adhesive system, a Si-C composite negative electrode and a preparation method of the Si-C composite negative electrode. The water-based adhesive system comprises polyacrylic acid, a water-based composition, a polymer and water, the water-based composition comprises carboxymethyl cellulose and butadiene styrene rubber in a mass ratio of 1: (1-2), and the polymer comprises a polyurethane elastomer and / or a dynamic covalent bond polymer. The PAA is used as a main bonding matrix, hydrogen bonds or weak chemical bonds are easily formed on the surfaces of silicon particles, and Si expansion can be restrained; cMC / SBR provides certain flexibility and dispersity, and the overall uniformity and flexibility of the electrode coating are improved; the dynamic covalent bond polymer or the polyurethane elastomer can realize reversible crosslinking when electrode microcracks are generated, and the self-repairing capability is provided; the Si-C composite negative electrode prepared by the water-based adhesive system shows higher capacity retention ratio and longer cycle life in a half-battery or full-battery test.

The invention belongs to the technical field of rubber processing and aircraft tire manufacturing, and particularly relates to a rubber composition, a preparation method thereof and application of the rubber composition as wave-shaped steel wire coating rubber of an aircraft radial tire. The rubber composition provided by the invention is prepared from 100 parts of natural rubber, 78 to 100 parts of a reinforcing system, 1.2 to 1.5 parts of a silane coupling agent, 3.5 to 6 parts of a bonding system, 0.3 to 0.5 part of a bonding promoter, 3.5 to 5.3 parts of an aging protection system, 2 to 5.7 parts of a crosslinking system, 6 to 6.5 parts of a crosslinking activation system, 5 to 8 parts of a plasticizing system and 3 to 5 parts of tackifying resin. The rubber composition provided by the invention has the advantages of excellent heat resistance, low compression fatigue temperature rise, high tensile strength and high elongation at break, and can form good adhesion with a wavy steel wire, so that the service life of the aviation radial tire is remarkably prolonged, the safety performance of the aviation radial tire is remarkably improved, and the puncture resistance of the aviation radial tire is effectively enhanced.

The invention discloses a preparation method of a tackifying flame-retardant organic silicon pressure-sensitive adhesive, which comprises the following steps: carrying out hydrosilylation reaction between a vinyl trimethoxy silane coupling agent and methyl hydrogen-containing silicon resin to synthesize an organic silicon tackifier MQ-ETMS, and carrying out wet modification on aluminum diethylphosphinate by using an olefinic bond-containing silane coupling agent to prepare a flame retardant K-ADP. After the prepared organic silicon tackifier and the flame retardant are introduced into an organic silicon pressure-sensitive adhesive system, the high-performance organic silicon pressure-sensitive adhesive tape is prepared through blending, coating, solvent volatilization and heating crosslinking. The synthesized tackifier is rich in methoxyl functional groups, the functional groups enhance the interaction between the organic silicon pressure-sensitive adhesive and the surface of an adhered material, and meanwhile, the olefinic bond-containing silane coupling agent is utilized to perform surface modification on the aluminum diethylphosphinate, so that the problem of dispersion of a traditional flame retardant added into the organic silicon pressure-sensitive adhesive is solved; therefore, the adhesion performance and the flame retardant property of the organic silicon pressure-sensitive adhesive are both improved.

The present invention belongs to the field of new materials. Provided are a polyether-type thiol composition and the use thereof. The polyether-type thiol composition comprises a polyether-type thiol compound and a compound as represented by formula (1), wherein the polyether-type thiol compound is mainly obtained by means of a reaction between a polyhydric alcohol, a halogenated hydrocarbon and a sulfhydrylization reagent, with the hydroxyl value of the polyhydric alcohol being 300-600 mgKOH / g; and the compound as represented by formula (1) is 0.01%-8% of the total mass of the polyether-type thiol composition. The polyether-type thiol composition can be used independently or used in a mixture with other thiol compounds; and the polyether-type thiol composition and an epoxy resin are cured under the action of an accelerant and an auxiliary agent so as to prepare an adhesive, and the adhesive can be used as a raw material to prepare a sealant. The polyether-type thiol composition can not only achieve rapid curing of an epoxy resin adhesive at room temperature, but can also improve the flexibility of an adhesive system, thereby improving the long-lasting safety of an application scenario of a sealant product in the building industry, thus maintaining the physical and psychological health of a human body for a long time.

The invention relates to the field of high polymer materials, and particularly provides a bio-based polythiol curing agent and a preparation method and application thereof.The bio-based polythiol curing agent is obtained through reaction of polyether polyol, epoxy chloropropane and a sulfhydrylation reagent, the epoxy chloropropane is prepared from bio-based raw materials, and the sulfhydrylation reagent is prepared from polyether polyol. The invention relates to epoxy chloropropane, in particular to epoxy chloropropane prepared by a glycerin method, and the mass content of 2, 3-epoxypropane methyl ether in the epoxy chloropropane is less than 0.4%. By controlling the content of 2, 3-epoxypropane methyl ether in the bio-based epoxy chloropropane, the humidity and heat resistance of a polythiol adhesive system applied to the downstream can be improved. The epoxy adhesive prepared from the epoxy resin has the advantages of higher humidity and heat resistance, higher adhesive property, higher glass transition temperature and longer service life, can reduce the maintenance cost, and is widely applied to the fields of electronic and electrical appliances, automobile manufacturing, aerospace, architectural decoration and the like.

The invention discloses a civil aviation radial tire corrugated protective layer rubber and a preparation method thereof, and the rubber adopts a technical method that 1 # smoked sheet rubber is used as a main body material, N330 carbon black is used as a reinforcing system, N46 engine oil is used as a plasticizer, insoluble sulfur, an accelerant DZ and the like are used as vulcanizing agents, and an adhesive RS, C9 resin and tackifying resin HT-M are used as an adhesive system. The rubber material with high adhesion, impact resistance, tear resistance, puncture resistance, low heat generation and good fatigue resistance is prepared through a certain mixing process, and the rubber material serving as the corrugated protective layer rubber material of the civil aviation radial tire has good adhesion performance of a framework material (aramid fiber rope), higher physical performance, lower heat generation performance and good anti-fatigue performance. The damage resistance of foreign object puncture resistance and mechanical damage resistance of the civil aviation radial tire is improved, so that the durability of the tire is improved.

The invention relates to the technical field of silicon carbide ceramic materials, and particularly discloses a preparation method of high-performance silicon carbide granulation powder. The method comprises the following steps: S1, preparing a composite adhesive system; s2, pre-dispersing the slurry; s3, ball milling dispersion; s4, mixing and size mixing; s5, spray drying; and S6, low-temperature activation. The adhesive is a ceric ammonium nitrate-ascorbic acid-dicyandiamide composite catalytic oxidation system, in the low-temperature activation stage, high-activity Ce < 3 + > generated by reaction of ceric ammonium nitrate and ascorbic acid efficiently catalyzes and cuts off polyvinyl alcohol molecular chains and promotes thorough decomposition of the polyvinyl alcohol molecular chains, dicyandiamide is decomposed to release gas to form a micro-channel, and a local atmosphere is created; the carbon residual rate is remarkably reduced to 0.06% or below, the apparent density is larger than or equal to 0.85 g / cm < 3 >, the porosity of a sintered body is smaller than or equal to 0.7%, and the technical problems of residual carbon control and uniform forming are solved.

A primer composition includes a solvent, a conductive filler dispersed in the solvent, and a polymer in at least one state dissolved or dispersed in the solvent. The polymer includes at least one of polyurethane, polyacrylate, polyamide, or rubber. An adhesive system comprises an electrically conductive composition and an electrodebonding adhesive comprising an ionic liquid. The use of the primer composition as a primer on a non-conductive substrate in combination with an electrodebonding adhesive is also described. A method of making a bonded article and an article bonded with the adhesive system disclosed herein and / or made by the method disclosed herein are also described.

The invention relates to the technical field of activated carbon materials, and discloses low-hole-blocking high-strength honeycomb activated carbon and a preparation method thereof. The honeycomb activated carbon comprises activated carbon particle skeletons and a bonding network filled among the activated carbon particle skeletons, and the bonding network is formed by heat treatment and curing of a bi-component crosslinking adhesive system; the bi-component crosslinking adhesive system comprises a copolymer emulsion adhesive A and a powder adhesive B, active functional groups in a copolymer emulsion component and organic acid in a powder component are subjected to esterification crosslinking reaction under the thermal action, so that a three-dimensional crosslinking network structure is formed among activated carbon particles, and bridging connection is constructed; the honeycomb activated carbon has relatively high iodine adsorption value and axial compressive strength; by constructing a composite structure with the synergistic effect of a particle skeleton and a cross-linked bonding network, the overall mechanical strength of the honeycomb activated carbon is improved while the micropore structure of the activated carbon is maintained, the pore channel blocking phenomenon is reduced, and the honeycomb activated carbon is suitable for the fields of industrial waste gas treatment, volatile organic compound adsorption and the like.

The invention especially relates to an adhesive system (3) comprising an aqueous polymer dispersion, preferably in the form of an epoxy resin dispersion, with hotmelt polymer particles (4) present therein. The hotmelt polymer particles are preferably highly polymeric and particularly preferably comprise reactive end groups, especially NH2 end groups. The adhesive system (3) more preferably comprises polyisocyanate for reaction with these reactive end groups. The invention more preferably relates to an apparatus comprising a metal sheet (2) and a homogeneous dispersion adhesive layer (2) composed of the adhesive system (3) applied thereto. The hotmelt polymer particles (4) may be larger than an adhesive layer (5) composed of the, especially dried, aqueous polymer dispersion, with the result that they protrude above the adhesive layer (5). As a result, the apparatus may be particularly readily rolled up without a risk of sticking within the coil. The invention finally preferably relates to a process for producing at least one apparatus, especially for producing a plurality of apparatuses, wherein the adhesive system (3) is applied to the metal sheet (2) and the apparatus(es) are dried.

The present invention relates to a modified silane adhesive and a preparation method thereof. The raw material composition of the modified silane adhesive includes, by weight, 45-75 parts of silane-modified polyether, 10-20 parts of silane derivatives, 0.3-2 parts of water scavengers, 1-3 parts of catalysts, 0.5-3 parts of coupling agents, 10-15 parts of plasticizers, and 5-15 parts of modified graphene oxide. The present invention uses silane derivatives for modified silane adhesive systems, wherein the silane derivatives provide excellent flame retardant effects for the adhesives on the one hand; on the other hand, by enhancing the intermolecular forces and cohesive strength of the adhesives, the mechanical properties of the modified adhesives are improved. Modified graphene oxide is also introduced into the modified silane adhesive system of the present invention as a functional component to impart excellent waterproof and antifouling properties to the adhesives.

Various examples of switchable adhesive elements are described. An example switchable adhesive element includes a compliant stalk extending from a support end to a contact end. The compliant stalk includes a tapered outer surface and a curved contact surface at the contact end. The switchable adhesive element further includes a membrane coupled to the curved contact surface and capping the contact end of the compliant stalk. The curved contact surface can be curved with a radius of curvature between 5 mm and 100 mm in various examples. In other aspects, the compliant stalk includes a fluid channel that extends through the compliant stalk from the support end to the contact end, and the membrane is pneumatically or hydraulically actuated via the fluid channel through the compliant stalk.

The invention relates to adhesive systems for lignocellulosic composite materials comprising a) a primer composition, b) an NCO-containing adhesive composition.

The invention relates to an HHOF-TGU307 enhanced acrylic acid adhesive as well as a preparation method and application thereof, and belongs to the technical field of macromolecular functional materials. Aiming at the problem that the existing acrylic acid adhesive is difficult to meet the high-performance requirement in the aspects of bonding strength and mechanical property, and particularly the defects of insufficient bonding strength, easy aging, interface failure and the like in the emerging application fields of new energy and the like, HOF-TGU307 (hydrogen bond organic framework) is introduced into an adhesive system; the cohesive force and the adhesion capacity with a base material are obviously improved. The HOF-TGU307 material is a novel crystalline organic porous material with high specific surface area, high crystallinity and adjustable aperture, the HOF-TGU307 material shows unique solution processability and easy regeneration due to reversibility and flexibility of hydrogen bonds, and the HOF-TGU307 material has good biocompatibility and low cytotoxicity due to the metal-free characteristic; the characteristics enable the HOF to become a new platform of functional materials. The adhesive is formed by polymerization of two acrylic monomers in an ethanol solution through ultraviolet initiation, the process is simple and environment-friendly, and the obtained product has good storage and transportation stability. Performance tests show that the bonding strength of the adhesive on a PMMA (polymethyl methacrylate) base material can reach 1.36 MPa, and Fourier infrared spectroscopy and scanning electron microscope analysis verify good compatibility and dispersion state between HOF-TGU307 crystals and a polymer matrix. The adhesive provided by the invention has wide application prospects in the fields of structural bonding, photoelectric materials, automobiles, new energy and the like.