724 results about "Conductive ink" patented technology

Various aspects of this disclosure relate to a layered polymer substrate with electrodes and conductive ink embedded in the substrate. In some embodiments, a prosthetic liner may be bonded onto the polymer substrate. The substrate may include an interconnect coupled to the electrodes via the conductive ink. The system may include a controller (e.g., an electrode controller) in communication with the electrodes via the conductive ink. The electrodes may be activated such that they may stimulate nerve fibers in a user's residual limb.

A method of fabricating a wearable and elastically stretchable thermoelectric generator or other thermoelectric device can involve arranging thermoelectric pellets and printing a thermal insulation material alongside and / or around the thermoelectric pellets to form a core layer. The core layer can be cured, and a liquid metal can be selectively deposited on the thermoelectric pellets to form contact points. Printing conductive ink can form stretchable electrical interconnects that define connections among the thermoelectric pellets via the contact points to form an initial middle layer that includes the stretchable electrical interconnects. Printing a thermal interface material may form an initial outer layer positioned between the initial outer layer and an initial side of the core layer to form a layered assembly. The layered assembly may be inverted and receive additional printed layers building away from the core layer, such as an additional interconnect layer and an additional thermal interface layer.

Various aspects of this disclosure relate to a layered polymer substrate with electrodes and conductive ink embedded in the substrate. In some embodiments, a prosthetic liner may be bonded onto the polymer substrate. The substrate may include an interconnect coupled to the electrodes via the conductive ink. The system may include a controller (e.g., an electrode controller) in communication with the electrodes via the conductive ink. The electrodes may be activated such that they may stimulate nerve fibers in a user's residual limb.

An ostomy appliance includes a substrate and at least one Radio Frequency Identification (RFID) circuit disposed on the substrate. The RFID circuit includes a RFID transponder having an antenna and a conductive ink connected in series with the antenna and the RFID transponder. The conductive ink is configured to dissolve in response to exposure to moisture. The RFID circuit is in a closed condition when the conductive ink extends continuously between the RFID transponder and the antenna. The RFID circuit is in an open condition when at least a portion of the conductive ink is dissolved.

The invention provides a preparation method of water-based UV curing conductive ink, and relates to the technical field of polymer conductive material preparation, the preparation method comprises the following steps: respectively preparing modified water-based UV resin, nano-silver and a nano-silver-graphene composite material; and mixing the prepared modified water-based UV resin, nano-silver and a nano-silver-graphene composite material with a photoinitiator, 1, 6-hexanediol diacrylate and an auxiliary agent to obtain the water-based UV curing conductive ink. The preparation method comprises the following steps: firstly, synthesizing an unsaturated epoxy intermediate (EA) by utilizing acrylic acid (AA) and bisphenol A type epoxy resin E-51, then adding the epoxy intermediate EA into an intermediate PUA, and carrying out full end capping on the PUA to prepare light-cured resin; preparing nano-silver and a nano-silver-graphene composite material through a chemical reduction method; and finally, constructing a conductive network in the ink by virtue of a synergistic effect between the nano-silver and the nano-silver-graphene composite material, so as to prepare the water-based UV-cured high-performance conductive ink.

The invention discloses an automatic conductive ink screen printing quality detection method based on a big data model. The method comprises the following steps: acquiring hyperspectral image data, three-dimensional shape data and real-time impedance distribution data of a conductive ink screen printing layer; performing local outlier factor optimization processing on the hyperspectral image data, and extracting a pixel-level spectral feature vector; performing vertical weight function Gaussian regression filtering on the three-dimensional shape data to generate a topological smooth curved surface coordinate set; optimizing the real-time impedance distribution data based on the conductivity distribution matrix, and outputting a noise reduction conductivity matrix; constructing an association graph and a node feature tensor based on the detection key points, and generating silk-screen multi-modal data; through modal interaction, features are extracted in stages, and cross-modal joint features are extracted through multi-stage joint clustering optimization; and a task space separation head module is input, and a quality evaluation result is output through classification and regression branches. According to the method, multi-modal data deep fusion, noise robustness improvement, cross-modal feature accurate extraction and efficient real-time detection are realized.

The invention provides photo-crosslinking conductive ink based on aliphatic polycarbonate as well as a preparation method and application of the photo-crosslinking conductive ink. The photo-crosslinking conductive ink comprises an aliphatic polycarbonate polymer, a plasticizer, a crosslinking agent, a crosslinking catalyst and a photo-crosslinking agent. According to the invention, a carbonate monomer 5-methyl-5-carboxyl trimethylene carbonate initiated by PEG2000 is adopted, and an aliphatic polycarbonate polymer is synthesized through a copolymerization reaction and is used as a main matrix material of the conductive ink; the conductive ink not only has good conductivity, but also has biocompatibility and environmental friendliness, and the application range of the conductive ink in the fields of medical instruments, biosensors and the like is widened; the excellent mechanical property ensures that the conductive ink can keep structural integrity and functional stability in practical application, and the conductive ink is particularly suitable for flexible electronic devices and wearable equipment which need to be frequently bent and stretched. The preparation steps are simple and convenient, the process is controllable, raw materials are easy to obtain, energy consumption in the process is low, and the cost advantage is achieved.

There is described an artificial intelligence wearable ECG skin patch (400) to detect sudden cardiac arrest. The wearable ECG monitoring patch (400) with AI based predictive analytics and remote based cardiac monitoring (615) system that can detect cardiac arrhythmias automatically in real-time and make a diagnosis with AI models trained with acquired data. The wearable skin has a biocompatible polymer patch (400) which captures the electrical signal through a flexible printed electronic technology based conducting ink and a substrate. The microcontroller controls (201), store and transmit the data packets. The IoT connected signal transmission is capable of recording and transferring the data packets through wireless communication. The AI engine is capable of analysing, evaluating, testing and providing the data packets of sudden cardiac arrest through a peak detector algorithm. The ECG skin patch (400) to detect and measure the sudden cardiac arrest with the R-R interval time series to obtain heart rate variability.

The invention discloses a resistive flexible temperature sensor device and a preparation method thereof, and the method comprises the steps: dispersing graphene conductive ink in a homogenizer at a rotating speed of not less than 1000 r / min to obtain uniformly dispersed graphene conductive ink; copper welding spots are arranged at the two ends of the flexible substrate, the flexible substrate is placed on an operation platform, the operation platform is placed on a silk-screen printing table, graphene conductive ink is evenly coated on the silk-screen printing table for printing, and the obtained flexible substrate with the graphene temperature-sensitive film is placed on a constant-temperature heating table at the temperature of 90-160 DEG C to be dried for 40 min to 2 h; a wire connected with a processor is welded at the copper welding point, and the processor is used for obtaining a temperature value according to the collected voltage value. According to the invention, the wearing comfort is good, and good temperature sensing characteristics and high response speed can be shown in a human body temperature range.

The invention belongs to the technical field of sensors and intelligent wearable electronics, and discloses a nano-fiber-based composite material with a cobweb structure as well as a preparation method and application of the nano-fiber-based composite material. Preparing a Cu < 2 + >-doped polylactic acid porous nanofiber membrane by utilizing electrostatic spinning, and spraying copper conductive ink in the spinning process; and then hydrogel is sprayed and cross-linked to obtain the nanofiber strain sensor with a cobweb structure. Under the action of strong surface energy of a porous nanofiber interface, the copper conductive ink forms a linear continuous conductive area depending on fiber appearance, a flaky conductive area is constructed by enrichment distribution of the conductive ink at the junction of fibers, and the linear and flaky areas are in network connection in the polylactic acid porous nanofiber membrane. A bionic cobweb structure electric signal transmission structure model is constructed, hydrogel is sprayed to enable the structure to be crosslinked and wound, and the nanofiber-based high-sensitivity strain sensor which is high in toughness, resistant to fatigue and excellent in human skin attaching capacity is obtained. The preparation method is simple, low in cost, high in toughness, resistant to fatigue, excellent in human skin attaching capacity, high in sensitivity and wide in application range, and can be used for physiological health detection and wearable electronic equipment.

The invention discloses a conductive glass fiber cloth, which comprises a glass fiber base cloth and a carbonized conductive layer formed on the glass fiber base cloth, and the carbonized conductive layer is obtained by coating conductive ink and calcining, the conductive ink is prepared from the following components in parts by weight: 10 to 30 parts of low-melting-point glass powder, 3 to 5 parts of graphene, 0.5 to 2 parts of single-walled carbon nanotubes, 0.1 to 0.5 part of conductive carbon black, 5 to 10 parts of resin, 0.1 to 0.3 part of dispersing agent, 0.01 to 0.03 part of anti-settling thixotropic agent, 0.01 to 0.05 part of silane coupling agent, 70 to 90 parts of water and 5 to 20 parts of ethanol. The conductive glass fiber cloth is high in sheet resistance stability, good in coating adhesion fastness, excellent in impact resistance and suitable for conductive functionalization of thin glass fiber cloth.

A conductive ink composition contains a (meth)acrylic polymer (A) and silver particles (B). The (meth)acrylic polymer (A) has a glass transition temperature of ≤0° C., a weight average molecular weight of ≥500,000, and a hydroxyl value of more than 50 mgKOH / g. The silver particles (B) have a specific surface area of 0.5 to 3.0 m2 / g, a 50% average particle diameter of 0.5 to 14.0 μm, a maximum particle diameter of ≥8 μm, and a solid content from 50 to 80% by mass. Another conductive ink composition contains a (meth)acrylic polymer (A) and carbon black (CB). The (meth)acrylic polymer (A) has a glass transition temperature of ≤0° C., a weight average molecular weight of ≥500,000, and a hydroxyl value of more than 50 mgKOH / g. The carbon black (CB) has a specific surface area of ≥50 m2 / g, an aggregate diameter of ≤400 nm, and a solid content from 15 to 30% by mass.

An apparatus, system, and method for providing a moisture supplementation detection device. The moisture replenishment detection device includes: a flexible substrate having a circuit screen-printed therein, the circuit including a plurality of conductive ink layers and a dielectric ink layer; a sensor on the flexible substrate, wherein the sensor is capable of detecting element data indicative of a characteristic of sweat; an untreated chromatographic paper placed in contact with the skin of the user and capable of wicking sweat from the skin to the sensor along the micro-sized fluid channel; and a Bluetooth antenna on the flexible substrate and in communication with the sensor, and capable of wirelessly communicating the element data to an application capable of indicating to the user the user the suitability of moisture replenishment based on the element data.

The invention relates to the technical field of intelligent materials, and discloses a p-MXene conductive ink and BC reinforced polymer composite film and a preparation method and application thereof.The composite film comprises MXene and bacterial cellulose, the surface of the MXene is coated with waterborne polydopamine, waterborne polyurethane is embedded in the bacterial cellulose, and the surface of the MXene is coated with waterborne polyurethane; hydroxyl groups in the water-based polydopamine and amino groups in the water-based polyurethane form hydrogen bonds to connect the MXene with the bacterial cellulose. The composite film obtained by the invention has excellent mechanical properties and electrical properties, and also has comprehensive properties such as electromagnetic shielding and stress-strain sensing.

The invention belongs to the technical field of precious metal materials, and particularly relates to crystal face sphere-like silver powder and a preparation method and application thereof. The preparation method of the crystal face sphere-like silver powder comprises the following steps that a first silver nitrate solution, a first reducing agent solution, a stabilizer and a surfactant are mixed, and a colloidal solution is obtained; mixing the colloidal solution and the neutralizer solution to obtain a reaction base solution; and a second silver nitrate solution and a second reducing agent solution are added into the reaction base solution at the same time and then mixed with a dispersing agent, and the crystal face sphere-like silver powder is obtained. According to the preparation method provided by the invention, the colloidal solution is prepared as the seed crystal, the liquid-phase reduction reaction is carried out in a manner of simultaneously adding the reducing agent solution and the oxidizing agent solution, the crystal face silver powder with a novel structure is obtained, and the prepared silver powder has relatively good dispersity, consistency and crystal face sphericity-like degree and also shows relatively high sintering activity; therefore, the conductive ink has a good printing effect and conductive performance, and has a wide application prospect.

The invention belongs to the field of conductive ink, and discloses conductive ink based on PEDOT: PSS and carboxylated carbon nanotubes, and the conductive ink is prepared from PEDOT: PSS, carboxylated carbon nanotubes, [EMIM] [TCB], polyacrylate, salicylic acid and DMSO. According to the conductive ink with PEDOT: PSS as the main body, [EMIM] [TCB], carboxylated carbon nanotubes, salicylic acid and DMSO are introduced to improve the performance of the ink, the obtained conductive ink is high in conductivity, high in oxidation resistance and good in printing performance, and a flexible transparent electrode prepared from the conductive ink is high in conductivity and light transmittance and can be well suitable for the fields of human body wearable, robot electronic skin and the like.

The invention relates to a method for preparing a reversible adhesive flexible conductive film through aerosol jet printing. The method comprises the following steps: S1, preparing a phase transition polymer film; s2, preparing conductive ink; and S3, preparing the reversible adhesive flexible conductive film. According to the invention, the modulus change of the phase transition polymer is controlled by using temperature, and the phase transition polymer is used as a substrate of the conductive film, so that the conductive ink is completely transferred in an aerosol jet printing mode in a low-temperature and high-modulus state, and the adhesive and peelable conductive film is prepared; the method has a wide prospect in the application fields of electrophysiological signal monitoring, epidermal sensing, wearable electronics and the like.

The invention discloses a method for preparing nano copper powder based on a microwave-assisted reduction method and application. The method comprises the following steps: a) preparing a copper ion solution; b) adding a dispersing agent and a surfactant; c) adding a reducing agent; d) microwave heating reaction; e) separating and purifying a product; and f) drying. According to the method, directional reduction and morphology regulation and control of copper ions are achieved through the synergistic effect of a microwave field and chemical reduction, the specific surface area of the obtained product reaches 25-35 m < 2 > / g, the oxygen content is lower than 0.8 wt%, and excellent performance is shown in the fields of electronic packaging and conductive ink; the method has the characteristics of short reaction time (shortened by 90% compared with the traditional method), low energy consumption (less than 0.5 kWh / kg), no harmful by-product and the like, and meets the requirements of green chemical industrial production.

The invention belongs to the technical field of conductive ink, and particularly relates to conductive UV ink-jet ink containing silver nanowires and a preparation method of the conductive UV ink-jet ink. According to the preparation method, the carbon nanotubes are subjected to composite modification, silver loading is realized through a heating reduction method, photocuring performance is obtained by means of grafting of dopamine and acrylic acid, and the conductive UV ink-jet ink containing the silver nanowires is prepared by being matched with the modified silver nanowires for common use, so that the conductive UV ink-jet ink containing the silver nanowires is prepared on the basis of ensuring that the ink is dispersed stably and does not generate precipitates; and the conductivity is effectively improved.

The utility model discloses a non-inductive wireless electroencephalogram cap using a dry electrode, and belongs to the technical field of medical instruments. The electroencephalogram cap comprises a cap-shaped silica gel substrate, the inner surface of the silica gel substrate is provided with a strip-shaped or sheet-shaped printing substrate in a printing electrode and printing wire area, and the printing electrode and the printing wire are coated on the printing substrate through spraying, brush coating, blade coating or printing and are packaged through a sealing layer and a wire packaging substrate respectively. According to the electroencephalogram cap, the main body structure of the electroencephalogram cap is made of a silica gel material, the electrodes and the wires are made by adopting a printing electronic process, the printed wires are connected with an external measuring wire and an instrument through a flexible flat cable after being gathered, and an area covered by the electroencephalogram cap is not provided with any high-hardness structure and part, so that the electroencephalogram cap is very comfortable to wear. The electrode is formed by printing stretchable conductive ink, has low impedance and high flexibility and is tightly attached to the scalp in the long-time wearing process, and the obtained electroencephalogram signal is excellent and stable.

The invention relates to metal nanoparticle loaded and modified graphene and carbon nanotube composite material conductive ink and a preparation method thereof. The metal nanoparticle loaded and modified graphene and carbon nanotube composite material conductive ink is prepared from the following raw materials in parts by weight: 30 to 300 parts of metal nanoparticle loaded and modified graphene and carbon nanotube composite material, 100 to 400 parts of glass powder, 100 to 300 parts of resin, 200 to 400 parts of solvent, 20 to 80 parts of dispersing agent, 10 to 60 parts of flatting agent and 0.2 to 3 parts of defoaming agent, the conductive ink disclosed by the invention has relatively low sheet resistance and excellent conductivity.

A sterile drape positionable covering medical equipment, such as between a robotic manipulator and a sterile surgical instrument. The drape is formed of a flexible sterile material, with conductive ink printed on the flexible material. The drape provides both a sterile barrier and a shield against electrostatic discharge or electromagnetic interference.

The invention relates to the technical field of conductive ink and sensor production, in particular to a flexible pressure sensor, conductive ink and a preparation method thereof.The preparation method comprises the steps that S1, a modified polyester resin composition is prepared; s2, quaternary ammonium salt modified nanocellulose and a conductive filler are adopted as raw materials to prepare a modified conductive filler; s3, respectively weighing the modified polyester resin composition, the modified conductive filler, a solvent and an auxiliary agent in proportion, adding the materials into a reaction kettle, dispersing, and stirring at a high speed to obtain conductive ink coarse slurry; s4, grinding the conductive ink coarse slurry, adjusting the distance between roll shafts to enable the fineness of the slurry not to exceed 20 microns, filtering and discharging to obtain conductive ink powder; s5, the viscosity is adjusted to be in the range of 5000 cps to 12000 cps, and the conductive ink is obtained. Through the synergistic effect of the components in the conductive ink, the flexible pressure sensor made of the conductive ink has high sensitivity and a wide enough force response range.

The invention discloses liquid metal ink as well as a preparation method and application thereof, relates to the technical field of liquid metal ink, and solves the technical problems that the existing conductive ink is poor in dispersion effect and easy to cause nozzle blockage, and high-temperature sintering is needed, so that the processing cost is increased, and a substrate material is limited. The preparation method comprises the following steps: dissolving n-dodecyl p-hydroxybenzoate in an ethanol solution to obtain an organic solution; liquid metal is dropped into the organic solution, and dispersion liquid of the liquid metal is obtained through ultrasonication; the dispersion liquid and diethylene glycol monomethyl ether are mixed and subjected to ultrasonic treatment, and quasi ink is obtained; mixing the quasi ink with ethylene glycol according to a volume ratio of 5: (2-4), and carrying out ultrasonic treatment and filter membrane filtration again to obtain liquid metal ink; the prepared liquid metal ink has good stability and dispersity and is suitable for flexible electronic ink-jet printing, and a flexible circuit with high conductivity can be obtained after normal-temperature mechanical sintering.

A display device includes: a first substrate, a barrier film, and a second substrate; a thin-film transistor layer, an emission material layer, an encapsulation layer and a touch detecting unit stacked on the second substrate; and a pad area in a non-display area and comprising pads connected to a driving substrate and facing the first substrate, the pads comprising: a pad contact hole formed by etching the second substrate and the barrier film; a first inorganic film and a pad electrode stacked on an inner circumferential surface of the pad contact hole; and a rear contact hole etched through a portion of the first substrate, and a pad bonded to the rear contact hole, with a middle hole connecting the pad contact hole with the rear contact hole, and the pad of the driving substrate is electrically connected to the pad electrode through a lower conductive ink.

The present invention discloses a method for preparing MXene / TPU conductive fiber, which belongs to the technical field of composite conductive fiber electrode preparation. x The PDA@MXene conductive ink obtained by surface modification of MXene nanosheets with dopamine hydrochloride is loaded onto the large-scale prepared MXene / TPU wet-spun conductive elastic fibers by dipping and coating to prepare PDA@MXene / TPU elastic fiber electrodes. The conductive properties of the composite fiber are used to develop structurally designable flexible self-powered sensing fabrics and fabric-based friction nanogenerators. The present invention solves the contradiction between high deformability, electrical properties and wearing comfort of flexible stretchable fiber electrodes; the surface modification of MXene by in-situ self-polymerization of dopamine solves the interface problem of MXene on the fiber surface, including but not limited to enhancing the adhesion properties between the conductive ink and the fiber and improving the electrical stability of the stretchable fiber electrode.

The invention discloses a method for preparing a conductive pattern through vacuum filtration, and relates to the field of flexible electronic technology and micro-nano processing. Comprising the following steps that firstly, a nanometer liquid metal particle solution is obtained; 2, polyvinylpyrrolidone is added into the nanometer liquid metal particle solution, solvent dilution and ultrasonic treatment are carried out, and liquid metal conductive ink is obtained; 3, printing a powdered ink pattern on the filter membrane by using a laser printer, and then forming a patterned thin film with a conductive pattern on the filter membrane through vacuum filtration of the liquid metal conductive ink; 4, the patterned thin film and the low-viscosity transfer printing thin film are subjected to cold pressing attachment and further subjected to hot pressing transfer printing to a target base material, and a finished product is obtained. The method has the beneficial effects that the laser printing technology is used for achieving accurate patterning, the liquid metal conductive ink forms a uniform patterned thin film on the filter membrane through the vacuum filtration technology, the manufacturing process is optimized, and the production efficiency is improved.

Examples include a functionalized compressible nonwoven material (CNM) cushion with a three-dimensional (3D) pressure-varying electrical conductance (PVEC) region. Integrated with the PVEC surface area is a conductive ink printed on thermoplastic film (CPT) single-sided conductance measurement coupling. The CPT single-sided conductance measurement coupling includes, on the thermoplastic film, N pairs of contact pads and N pairs of pad connection traces. The N pairs of contact pads are maintained, by thermoplastic adhesion, in direct electrical contact with the PVEC surface areas. The N pairs of connection traces extend from the N pairs of contact pads to trace terminals. A conductance measuring circuit selectively applies, via the N pairs of connection traces, voltage and a path to ground to the pairs of contact pads, and measures the resulting current.

The invention discloses conductive ink for ink-jet printing and a preparation method thereof. Comprising the following steps: step 1, dissolving bisphenol F type epoxy resin in dimethyl nylon acid, stirring for 10-15 minutes until the bisphenol F type epoxy resin is completely dissolved, then adding modified composite filler, methyl tetrahydrophthalic anhydride, a dispersing agent and a flatting agent, and continuously stirring for 20-30 minutes to obtain a mixed solution; 2, the mixed solution is subjected to ultrasonic treatment for 30-40 min till no macroscopic particles exist, and the conductive ink is obtained. The conductive ink has the beneficial effects that the epoxy resin is mixed with the modified composite filler, the methyl tetrahydrophthalic anhydride and the like, and ultrasonic treatment is performed to prepare the conductive ink; according to the conductive ink, the MXene and the carbon nanotubes are adopted to construct a three-dimensional conductive network, and the dispersity and the interface bonding force of the filler are improved through surface modification, so that the conductivity and the mechanical strength of the ink are effectively improved.

The invention discloses a multifunctional wound patch combined with electrical stimulation therapy and a preparation method and application thereof, and relates to the technical field of medical materials, and the multifunctional wound patch comprises a double-layer electrostatic spinning fiber membrane, a conductive ink layer and a conductive hydrogel layer. S-shaped concentric circle conductive electrode pairs written by conductive ink are integrated on the surface (directly in contact with the wound) of the hydrophobic fiber layer, and square conductive ports with corresponding sizes can be drawn at the tail ends of the two electrodes as required. And the surface of the conductive electrode pair is packaged by conductive hydrogel with an antibacterial function. An external electric signal can be transmitted to the electrode pair of the patch through the conductive port of the electrode pair, and then acts on a wound through the conductive hydrogel layer, so that on-demand electrical stimulation treatment on the wound is realized. According to the multifunctional wound patch combined with the electrical stimulation therapy, discharge of redundant seepage can be achieved, and it is guaranteed that the wound environment is good; the curcumin-loaded medicine has the effects of resisting bacteria, resisting oxidation and promoting healing on wounds.