1303results about "Electrically-conducting adhesives" 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.

The invention relates to a high-thermal-conductivity epoxy resin conductive adhesive containing a composite conductive filler and a preparation method of the high-thermal-conductivity epoxy resin conductive adhesive. The high-thermal-conductivity epoxy resin conductive adhesive containing the composite conductive filler comprises 6-16% of graphene oxide modified epoxy resin, 0.6-3% of a curing agent, 0-1% of a curing accelerator, 2-7% of epoxidized soybean oil modified single-layer / multi-layer carbon nanotubes, 3-7% of carbon fibers, 3-7% of nano silver powder, 40-70% of micron silver powder, 5.0-15.0% of a surface treating agent, 0.3-2.7% of a coupling agent, 0.5-1.5% of a dispersing agent, 0.1-0.3% of an antioxidant and 0.1-0.3% of a lubricant. 0.5% and the balance of a solvent. The graphene oxide modified epoxy resin and the epoxidized soybean oil modified single-layer / multi-layer carbon nanotubes are utilized to improve the dispersion stability of the filler, the modified single-layer / multi-layer carbon nanotubes are adopted as a short-range conductive additive, the carbon fibers are adopted as a long-range conductive additive, and the graphene oxide modified epoxy resin and the epoxidized soybean oil modified single-layer / multi-layer carbon nanotubes and the carbon fibers cooperate to improve the conductivity. The conductive adhesive disclosed by the invention is high in heat conductivity, low in volume resistivity and high in tensile strength and bending strength, and has a wide application prospect in the fields of automotive electronics, wind power photovoltaics, LEDs (Light Emitting Diode), LCDs (Liquid Crystal Display) and the like.

The present invention discloses a low-temperature conductive adhesive, which is prepared by weight using raw materials including 70-80 parts of silver powder, 20-30 parts of resin matrix, 1-10 parts of curing agent, 0.1-0.5 parts of silane coupling agent, 0.1-0.5 parts of stabilizer, and 0.1-0.5 parts of metal salt. The present invention introduces an organic metal salt into the resin matrix to reduce the contact resistance of the colloid, and after wet heat aging, maintains a lower contact resistance increase rate. The present invention adopts a combination of epoxy resin, acrylate and modified epoxy acrylic resin, and the weight of epoxy resin and acrylate is less than or equal to the weight of modified epoxy acrylic resin, so that low-temperature curing can be achieved. The present invention can achieve 60-80 ° C, 20-40 min curing, and the conductive adhesive elongation at break obtained can reach more than 8%, and before and after wet heat aging, there is a more stable and relatively small contact resistance, which is particularly suitable for the electronic field with high requirements for contact resistance.

The invention provides a biofeedback type electrical stimulation regulation and control device based on multi-mode physiological signal monitoring and a control method, the regulation and control device comprises an electronic component layer, a circuit layer, a man-machine interaction part and an adhesion layer, physiological signal acquisition and electrical stimulation regulation technologies are utilized, and a multi-source biosensor and an intelligent processing module are integrated, so that the regulation and control of the biofeedback type electrical stimulation regulation and control device is realized. Dynamic monitoring and real-time analysis of physiological signals are achieved, self-adaptive adjustment of personalized parameters is conducted based on signal characteristics, and a non-invasive biological feedback regulation and control system is formed. Through integrated multi-mode detection and intelligent regulation and control functions, a non-invasive and convenient regulation and control means is provided for wearers with abnormal nerve or physiological states; a portable and comfortable attached structure is adopted, the device can be worn at the Neiguan point for a long time, physiological signal continuous monitoring and electrical stimulation closed-loop feedback adjustment are achieved, and the personalized health management requirement of a user is met.

The invention relates to the technical field of conductive glue, in particular to polyurethane modified silicone rubber, sprayable conductive glue and a preparation method thereof. The polyurethane modified silicone rubber is prepared from the following components in parts by weight: 50 to 150 parts of vinyl silicone oil, 20 to 50 parts of polyurethane powder and 5 to 15 parts of compatilizer, the sprayable conductive glue comprises the following components in parts by weight: 20-40 parts of conductive particles, 5-15 parts of hydrogen-containing silicone oil, 50-150 parts of polyurethane modified silicone rubber, 1-10 parts of a coupling agent, 1-5 parts of a catalyst, 1-2 parts of an inhibitor, 40-90 parts of a diluent and 1-2 parts of a defoaming agent, compared with traditional silicone rubber, the polyurethane modified silicone rubber provided by the invention is high in mechanical strength and not easy to tear, when the polyurethane modified silicone rubber provided by the invention is used for preparing sprayable conductive glue, a conductive layer formed by the conductive glue is excellent in conductivity, and meanwhile, the mechanical property is also remarkably improved.

The invention belongs to the technical field of conductive adhesives, and particularly relates to a salt-fog-resistant waterborne conductive adhesive and a preparation method thereof.The salt-fog-resistant waterborne conductive adhesive is mainly prepared from, by weight, 5-10 parts of salt-fog-resistant waterborne polyurethane; 5 to 10 parts of water-based tackifying resin; 30 to 50 parts of conductive silver powder; 10 to 20 parts of ethanol; 2-10 parts of an anti-hydrolysis agent; and 10-30 parts of deionized water. According to the salt-fog-resistant aqueous conductive adhesive, polyurethane resin with polytetrahydrofuran alcohol and polycaprolactone polyol as main structures is used as matrix resin, a system is endowed with excellent water resistance and salt-fog resistance, the salt-fog-resistant aqueous conductive adhesive shows outstanding hydrolysis-resistant stability after being cured, and the salt-fog-resistant aqueous conductive adhesive and the conductive silver powder have a synergistic effect, so that the anti-settling performance is effectively improved.

The invention discloses a high-toughness conductive and thermal-conductive epoxy adhesive, a preparation method thereof and a conductive film, and belongs to the technical field of conductive materials. Comprising the following raw material components in parts by weight: 100 parts of epoxy resin, 4-25 parts of a latent curing agent, 0.5-5 parts of an accelerant, 200-600 parts of conductive filler, 5-15 parts of an epoxy-terminated polyurethane flexibilizer, 5-20 parts of a core-shell flexibilizer, 5-10 parts of a nitrile rubber flexibilizer, 2-10 parts of a reactive diluent, 0.5-2 parts of a coupling agent and 20-50 parts of a solvent. Through compounding of the over-end epoxy type polyurethane flexibilizer, the core-shell flexibilizer and the nitrile rubber flexibilizer, the prepared conductive adhesive has excellent toughness and bonding characteristics, and meanwhile, the shrinkage stress and thermal stress in the curing process can be reduced.

The application belongs to the technical field of conductive glue, and particularly relates to a conductive glue, a preparation method and application thereof, wherein the conductive glue is made of the following raw materials in parts by weight: 40-60 parts of synthetic acrylic resin, 5-15 parts of epoxy resin, 25-45 parts of conductive filler, 5-15 parts of latent curing aid, 80-120 parts of diluent and 5-8 parts of auxiliary agent. By adding the latent curing aid, the application can reduce the potential possibility of the reaction of the acrylic resin and the epoxy resin at room temperature, thereby improving the storage effect of the conductive glue, improving the overall performance of the electronic product and meeting different application scenarios with different requirements. The preparation method directly mixes the raw materials such as the acrylic resin, the epoxy resin, the conductive filler, the auxiliary agent, the diluent and the latent curing aid uniformly in the preparation process without the need of separation and storage, thereby reducing the production cost, simplifying the use process of the user, improving the production efficiency of the conductive glue and the product quality.

The invention discloses a self-power-generation stomach residence electronic capsule and application thereof, and belongs to the technical field of medical capsules, the self-power-generation stomach residence electronic capsule structurally comprises a capsule shell, and a self-power-generation stomach residence unit, a drug release unit and a circuit system which are arranged in the capsule shell; the self-generating stomach residence unit structure comprises an anode, a plurality of elastic support arms, a cathode and a fastener, and the fastener fixes the plurality of elastic support arms between the anode and the cathode; the anode and the cathode are subjected to primary battery reaction in a gastric juice environment to generate power; the drug release unit is detachably connected with the self-generating gastric residence unit, the drug release unit comprises a drug cabin and a propelling module, the propelling module comprises an electrolyte, an isolating membrane and a propellant, the isolating membrane plays a role in isolating the electrolyte and the propellant and can be dissolved by the electrolyte under the condition that voltage is applied, and the drug cabin is connected with the drug cabin. After the electrolyte is in contact with the propellant, pushing force is generated to release the medicine in the medicine cabin.

The invention provides an epoxy resin packaging bonding material with high bonding stability and a preparation method thereof. The packaging bonding material is prepared from the following raw material components: 8 to 18 percent of graphene oxide modified epoxy resin, 0.8 to 4.0 percent of a curing agent, 0 to 1 percent of a curing accelerator, 0.4 to 2.0 percent of a silane coupling agent, 2 to 7 percent of nano carbon black, 2 to 7 percent of carbon fiber, 40 to 60 percent of flaky silver powder, 4 to 8 percent of spherical silver powder, 4.4 to 13.6 percent of a surface treating agent, 4 to 6 percent of a reactive diluent, 0.5 to 1.5 percent of a toughening agent, 0.5 to 1.5 percent of a dispersing agent, 0.1 to 0.5 percent of a lubricating agent and the balance of a non-reactive diluent. Graphene oxide is utilized to modify epoxy resin, the dispersion stability of the filler is improved, modified carbon black is adopted as a short-range conductive additive, carbon fibers are adopted as a long-range conductive additive, the modified carbon black and the carbon fibers synergistically improve the conductivity, and the reinforcing effect is achieved. The packaging bonding material disclosed by the invention has the characteristics of low volume resistivity, high tensile strength and bending strength, high bonding stability and the like, and has wide application prospects in the fields of automotive electronics, wind power photovoltaics, LEDs (Light Emitting Diode), LCDs (Liquid Crystal Display) and the like.

The invention belongs to the technical field of conductive microsphere preparation, and particularly relates to a surface-roughened nickel-plated conductive microsphere and a preparation method and application thereof. The preparation method comprises the following steps: carrying out pretreatment to enable the surfaces of the polymer microspheres to contain nickel ions, reducing the nickel ions into nickel nanoparticles, activating the microspheres and carrying out chemical plating. According to the invention, the specific surface area of the conductive microspheres is increased by reducing the nickel nanoparticles on the surfaces of the microspheres, a large amount of impurities cannot be generated among the microspheres, and adhesion among the microspheres can be effectively prevented. According to the prepared conductive microspheres, the plating layer and the polystyrene microspheres are firmly combined, and the risk that the conductivity is reduced due to the fact that the surface of the plating layer falls off is reduced. The preparation method is safe, environment-friendly, simple, convenient and suitable for industrial production requirements.

The application provides a kind of fast curing acrylic glue and application, the fast curing acrylic glue is prepared from the following components according to weight parts: butyl nitrile rubber of terminal methacrylate is 13-17 parts;Polyurethane acrylate is 5-8 parts;Monofunctional acrylate monomer is 14-20 parts;Two functionality acrylate monomer is 7-13 parts;Three functionality acrylate monomer is 1-3 parts;Peroxide is 0.5-1.5 parts;Polymerization inhibitor is 0.01-0.04 parts;Coupling agent is 0.5-0.7 parts.The acrylic glue provided by the application has the advantages of fast curing, low volume resistivity after adding silver powder curing, good bonding strength, moderate elastic modulus, and can be used for photovoltaic tile conductive silver glue.

The invention relates to the technical field of functional composite probe material preparation, in particular to a three-core spinning technology-based bio-compatible gel probe and a preparation method thereof, and the three-core spinning technology-based bio-compatible gel probe comprises a composite skin layer and three functional core layers; the composite skin layer is composed of a sodium alginate-polydopamine-chitosan grafted copolymer in a mass ratio of 2: 1: 0.5, and contains # imgabs 0 # chondroitin sulfate and # imgabs 1 # polyoxyethylene; the three core layers are respectively a carbon nanotube-polyaniline # imgabs2 # hybrid material, a graphene-polypyrrole-boron nitride hybrid material and a # imgabs3 # polythiophene-hydroxyapatite hybrid material, and the mass ratio of the carbon material to the conductive polymer to the newly added nano material in each core layer is 1: 2: 0.3; and the diameter ratio of the skin layer to the three core layers is 1: 0.28: 0.22: 0.17. According to the invention, multichannel signal transmission is realized, the impedance is reduced by the hybrid material, and the conductivity is improved; the composite skin layer is matched with soft tissue mechanical properties, and interface bonding is stable; and the biocompatible component reduces inflammation, is suitable for acquiring nerve electrophysiological signals, and is easy for large-scale production.

The invention discloses a high-bonding-strength conductive adhesive and a preparation method and application thereof.The preparation method comprises the following steps that S1, epoxy resin E51 is placed in a three-neck flask, acetone is added, stirring is conducted till the epoxy resin E51 is completely dissolved, and ethidene diamine is slowly dropwise added; s2, under the protection of nitrogen, heating to 70-80 DEG C, adding a catalyst triphenylphosphine, carrying out a constant-temperature reaction, after the reaction is completed, cooling to 35-45 DEG C, adding deionized water, and stirring; s3, acetone and unreacted ethylenediamine are removed, then deionized water is used for washing, an obtained product is placed in a vacuum drying oven to be dried, and amino modified epoxy resin of faint yellow viscous liquid is obtained; s4, mixing the amino modified epoxy resin with an anhydride curing agent, a conductive filler, a diluent and a coupling agent; and S5, fully stirring the mixture, carrying out vacuum defoaming, and uniformly stirring to obtain the conductive adhesive. According to the invention, the shearing strength of the chip and the copper bracket can be improved to more than 30MPa.

The invention relates to the technical field of nerve probes, and provides a four-mode integrated nerve probe and a preparation method thereof. The four-mode integrated nerve probe provided by the invention comprises a flexible substrate, an electric signal recording module, an ultrasonic stimulation module, a light stimulation module and a microfluidic channel. The electric signal recording module is used for recording electroneurographic signals, the ultrasonic stimulation module is used for ultrasonic stimulation, the optical stimulation module is used for optical stimulation and signal recording, and the microfluidic channel is filled with drugs through a microfluidic channel control port in the probe body and releases the drugs through a microfluidic channel outlet in the needle tip. According to the four-mode integrated nerve probe provided by the invention, multiple functions are integrated into one probe, so that comprehensive detection and regulation of a nervous system are realized, and the technical problems that a traditional nerve probe is single in function, inflammation is caused by a rigid material and multi-mode integration is insufficient are solved.

The invention discloses a high-performance conductive adhesive doped with conductive nanoparticles, and belongs to the technical field of conductive adhesives. The high-performance conductive adhesive provided by the invention is prepared from the following raw materials in parts by weight: 50 to 100 parts of vinyl liquid silicone rubber, 100 to 400 parts of modified silver coated copper powder, 1 to 10 parts of nano silver powder I, 1 to 10 parts of epoxy silane modified prepolymer, 3 to 30 parts of hydrogen-containing silicone oil, 0.1 to 5 parts of platinum catalyst and 0.05 to 1 part of inhibitor. The silver-coated copper powder and the epoxy silane are modified, so that the conductivity and the binding power of the conductive adhesive are greatly improved, and the epoxy silane modified prepolymer can form strong covalent bond combination with the surface of an adhered object through a high-density epoxy group of the epoxy silane modified prepolymer; the nano-silver bulges on the surface of the modified silver coated copper powder increase the effective contact area and the number of contact points among the conductive filler particles, so that the conductive adhesive has the characteristics of high conductivity, low resistance, high adhesive strength and strong toughness.

The invention provides a composite photo-initiation system electronic adhesive as well as a preparation method and application thereof, and relates to the technical field of anisotropic conductive adhesive films. The adhesive comprises a thermoplastic resin solution, an acrylate monomer, epoxy resin, a polyfunctional oligomer solution containing a carbon-carbon double bond and an epoxy group, an insulating inorganic filler, conductive particles and a composite photoinitiator solution, wherein the composite photoinitiator is composed of a free radical photoinitiator and a cationic photoinitiator, and acrylate free radical chain polymerization and epoxy resin cationic ring opening polymerization are synchronously triggered through ultraviolet light; and the polyfunctional oligomer is used as a molecular bridge to bond the two-phase curing network to form an interpenetrating cross-linked structure. The electronic adhesive provided by the invention realizes low-temperature rapid curing for 1-15 seconds, the curing shrinkage rate is reduced to below 1%, the reliability defect caused by oxygen inhibition, high shrinkage rate and phase separation of a traditional single system is solved, and the electronic adhesive is suitable for low-temperature efficient packaging of high-precision electronic components.

The invention discloses a high-performance ionic piezoelectric hydrogel system based on molecular network reconstruction and micro-nano structure coordinated regulation and an establishment method thereof, and the establishment method comprises the following steps: S1, mixing acrylamide, polyacrylamide, sodium gluconate and polyvinyl alcohol to prepare a pre-polymerized solution, and adding HCl into the pre-polymerized solution to obtain a mixed solution system; and S2, carrying out gradient cross-linking and ultraviolet curing on the mixed solution system to obtain the high-performance ionic piezoelectric hydrogel system based on molecular network reconstruction and micro-nano structure coordinated regulation. The sensitivity is improved by 66%, and the problem that a traditional material is insufficient in response to weak biological signals (such as pulse micro-vibration) is solved.

The invention provides conductive dual-network hydrogel carrying MOF (Metal Organic Framework) as well as a preparation method and application of the conductive dual-network hydrogel, and belongs to the technical field of hydrogel preparation. The preparation method comprises the following steps: preparing a hydrogel substrate from a neutral polymer monomer, a polyelectrolyte monomer, an MOF material and a conductive material, putting the hydrogel substrate into a growth solution of the MOF material and a mixed solution of an anti-inflammatory drug, and promoting uniform generation of an MOF nanosheet film on the surface of the hydrogel substrate and carrying of the drug under high-temperature and high-pressure conditions. And thus, the conductive dual-network hydrogel carrying the MOF is prepared. The double-network hydrogel prepared in the invention has excellent mechanical properties, conductivity and antibacterial properties, and can realize controllable and accurate drug release.

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.

The invention provides a micro-current traditional Chinese medicine patch for treating cervical spondylotic radiculopathy and a preparation method of the micro-current traditional Chinese medicine patch, and belongs to the technical field of medical care. The micro-current traditional Chinese medicine patch comprises a base material, a micro-current generating unit, a medicine layer and a conductive hydrogel layer, wherein the current of the micro-current generation unit is 30-500 [mu] A, and the medicine layer comprises traditional Chinese medicine and western medicine. Based on the micro-current technology, the traditional Chinese medicine microcapsules and western medicines are combined to serve as the medicine layer, and by adjusting the traditional Chinese medicine formula and proportion, the prepared micro-current traditional Chinese medicine patch can not only rapidly relieve pain and inflammation, but also adjust the overall function of the body and improve local qi and blood circulation and immune states. According to the micro-current traditional Chinese medicine patch, the treatment effect is improved, adverse reactions are reduced, the application range is widened, and the micro-current traditional Chinese medicine patch has important clinical significance.

The invention provides a self-destruction water-based resin film, which is prepared from the following raw materials in parts by mass: 50 to 60 parts of water-based acrylic resin, 20 to 40 parts of water-based epoxy resin, 10 to 30 parts of water-based polyurethane resin, 1 to 10 parts of isocyanate cross-linking agent and 1 to 10 parts of amino cross-linking agent. The self-destroying water-based resin film is formed through resin premixing, cross-linking agent reaction, coating curing, glue coating, release paper covering and film stripping, the film is innovated through a water-based resin composite system and a cross-linking process, and breakage or irreversible appearance destroy during removal after pasting is achieved, so that the self-destroying water-based resin film is formed, and the service life of the self-destroying water-based resin film is prolonged. The method is suitable for the fields of anti-counterfeit labels, security seals, electronic equipment anti-tamper identifiers and the like, and has the remarkable advantages of environmental protection, low cost and efficient production.

The invention relates to a liquid metal-hydrogel bioelectrode and a preparation method thereof.According to the preparation method, a hydrophilic polymer serves as a base material for electrostatic spinning, a hydrophilic fibrofelt with the thickness ranging from hundreds of nanometers to hundreds of micrometers can be obtained, and after crosslinking treatment, the liquid metal-hydrogel bioelectrode is obtained. Liquid metal is printed on a cross-linked hydrophilic fiber felt to construct a conductive network to form a liquid metal-hydrophilic polymer composite felt, in-situ rapid gelation can be realized through an interface solution to obtain a liquid metal-hydrogel biological electrode, and the liquid metal-hydrogel biological electrode is prepared through an on-demand gelation mechanism. The technical problems of preparation, storage and attachment of a traditional ultrathin hydrogel electrode are solved, the thickness can be effectively reduced, the integrity of a conductive network can be effectively kept, and the obtained liquid metal-hydrogel biological electrode integrates the dual advantages of an ultrathin dry electrode and a wet electrode and has the characteristics of excellent conformal attachment and low interface impedance.

The invention discloses a flexible hydrogel neural electrode and a preparation method and application thereof. The flexible hydrogel neural electrode comprises a flexible substrate layer, an electrode layer and a packaging layer which are sequentially arranged in a stacked mode, the flexible substrate layer and the packaging layer are each of a hydrogel fiber composite film structure formed by compounding a fiber film and hydrogel, and the fiber film is embedded in the hydrogel; the fiber film is a polycaprolactam fiber film, and the hydrogel is polyvinyl alcohol hydrogel; the electrode layer comprises a plurality of metal electrodes, and each metal electrode is provided with an electrode point and a bonding pad; the packaging layer is provided with a plurality of hole structures, and the holes are arranged corresponding to the electrode points and the bonding pads and enable the electrode points and the bonding pads to be exposed. The flexible hydrogel neural electrode provided by the invention has good biocompatibility, swelling resistance and process compatibility; meanwhile, the flexible hydrogel neural electrode can be stably applied to an implantable brain-computer interface and is used for realizing long-term stable acquisition and transmission of neural signals.

The invention relates to a graphene hydrogel neural microelectrode and a preparation method thereof.The neural microelectrode comprises a long-strip-shaped electrode body, the electrode body comprises an insulating substrate layer, a conductive layer and an insulating covering layer, and the conductive layer is wrapped and sealed by the insulating substrate layer and the insulating covering layer; a contact window is arranged at one end, close to the electrode body, of the insulating covering layer, a conductive expansion layer made of graphene hydrogel is arranged below the contact window and the insulating covering layer on the periphery of the contact window, the conductive expansion layer is electrically connected with the conductive layer, and the conductive expansion layer can expand after being heated or absorbing water to form an electrode contact protruding outwards from the contact window. Amino multi-walled carbon nanotubes, amino graphene quantum dots and gold nanoparticles are loaded in the graphene hydrogel. The electrode contact has the advantages that after the electrode contact is heated or absorbs water, the conductive expansion layer expands to form the electrode contact protruding out of the contact window, and the electrode contact is good in tissue affinity, capable of making better contact with nervous tissue and more excellent in performance.

The invention provides an enzyme protective agent for a continuous glucose sensor and the continuous glucose sensor, the enzyme protective agent comprises the following components: poloxamer and a zwitterionic polymer, and the mass percent concentration of the poloxamer is 0.1%-2%, and the mass percent concentration of the zwitterionic polymer is 0.5%-5%. By adopting the technical scheme provided by the invention, the poloxamer and the zwitterionic polymer are introduced, so that an enzyme layer coating process can be optimized, a coffee ring effect can be inhibited, and the consistency and monitoring accuracy of the sensor can be improved; and on the premise of keeping the signal transmission performance of the sensor unchanged, the activity and long-term stability of the biological enzyme preparation in the production, storage, transportation and use processes are remarkably improved.

The invention provides a biocompatible selective outer membrane of an implantable biosensor and a preparation method of the biocompatible selective outer membrane, and the preparation method comprises the following steps: preparing an outer membrane diluent, and respectively dissolving a PS-P4VP copolymer, NH2-PEG-NH2 and PEGDGE in the outer membrane diluent to obtain a mixed solution; the ratio of PS to P4VP of the PS-P4VP copolymer is (0.5: 9.5)-(3: 7); coating the surface of an enzyme layer of the in-vivo implanted sensor with the mixed solution, and curing for 48-56 hours at normal temperature, so that an amino group of NH2-PEG-NH2 and a pyridine group of P4VP form a dynamic covalent bond to obtain an inner layer; the inner layer is immersed in deionized water for 1.5 h or above, the uncrosslinked PEG derivative is eluted, and a porous inner layer is obtained; and coating the surface of the porous inner layer with a polysulfobetaine solution to obtain the hydrophobic antifouling coating. By adopting the technical scheme, the mechanical strength and the long-term stability are improved.

A conductive epoxy composition is disclosed comprising an epoxy resin, a low-viscosity hydrocarbon diluent, silver, and graphene. The one-part formulation provides enhanced electrical conductivity, mechanical strength, and process stability. The epoxy resin may include resorcinol diglycidyl ether, diglycidyl ether of Bisphenol A, or Bisphenol F. The hydrocarbon diluent may include glycidyl-ether-family resins having defined carbon-chain characteristics and molecular weights. Silver may be present in particulate, flake, nanoparticle, or coated forms at about 55-90 wt. %, while graphene may be present at 0.03-0.3 wt. % with dimensions of 1-10 μm and surface areas of 400-2,000 m2 / g. Optional additives include solvents, ionic liquids, latent curing agents, and strength enhancers to optimize curing and adhesion.

Described herein is a composite adhesive composition. The composition comprises: a plurality of polymeric nanoparticles dispersed within a (meth)acrylate-based matrix; and the (meth)acrylate-based matrix is derived from a C1 to C12(meth)acrylate ester monomer and a (meth)acrylate macromer. In some embodiments, these composite adhesives show good impact resistance and good dynamic shear resistance. In one embodiment, an ionic liquid is added to the composite adhesive to enable electro-debonding.

The invention relates to the technical field of conductive adhesives, in particular to a graphene doping-based flexible conductive adhesive and a preparation method thereof. The invention overcomes the defects of poor electrical conductivity and poor thermal conductivity of the existing adhesive. The preparation method comprises the following steps: mixing epoxy resin, carboxyl-terminated liquid nitrile rubber and 1, 4-butanediol diglycidyl ether, adding modified epoxy resin, and continuously mixing to obtain a mixed system; adding a nano-alloy into the mixed system, mixing, and carrying out first-stage high-shear dispersion to obtain a primary mixed material; adding a few-layer graphene and silver powder mixture into the primary mixture, stirring, and performing two-stage high-shear dispersion, low-frequency vibration treatment and vacuum defoaming treatment to obtain the flexible conductive adhesive. Wherein the modified epoxy resin is prepared from modified graphene oxide and epoxy resin; the modified graphene oxide is prepared from graphene oxide and a silane coupling agent. The adhesive prepared in the invention has strong electrical conductivity and strong thermal conductivity, and is suitable for bonding optical communication equipment components.