10 results about "Gel electrode" patented technology

This invention discloses a breathable, conductive hydrogel electrode, its preparation method, and its applications. The breathable, conductive hydrogel electrode comprises a porous fiber support structure and a hydrogel conductive network. The porous fiber support structure has a three-dimensional porous structure formed by interwoven porous fibers, each fiber possessing a three-dimensional interconnected channel structure formed by interconnected pores distributed on and within the porous fibers. The hydrogel conductive network is distributed on the surface and within the porous fiber support structure, forming a continuous ion conduction path within the electrode. The breathable, conductive hydrogel electrode provided by this invention has advantages such as high breathability, self-humidification, low impedance, and breathability, achieving high-fidelity, long-term acquisition of physiological signals such as electroencephalograms (EEG), electrocardiograms (ECG), and electromyograms (EMG). It can be widely used in electrophysiological signal monitoring, smart wearables, sleep analysis, and human-computer interaction.

The application discloses a starfish-imitated tube foot array hydrogel electrode and a preparation method thereof. The bottom of the conductive hydrogel electrode is provided with a starfish-imitated tube foot array. A single starfish-imitated tube foot comprises a stem and a terminal biomimetic sucker. The outer side of the sucker is a circular table structure, and the inner side is a cavity composed of a hemisphere. The integrated tube foot microstructure of the electrode is obtained by laser cutting of the hydrogel. First, the inner cavity structure is cut. Then, the outer side of the biomimetic tube foot shape is cut. Finally, the single biomimetic tube foot is inserted into the block-shaped hydrogel to form an array. The preparation method of the conductive hydrogel electrode comprises the following steps: first, a prepolymer is synthesized; then, the prepolymer, cationic monomers and anionic monomers are polymerized to obtain a hydrogel with anti-swelling and stable and excellent conductive performance. The conductive hydrogel electrode has the self-adhesion and anti-swelling ability when working underwater, can be closely combined with human skin, reduces the electrode-skin impedance, and improves the quality of underwater electromyographic signal collection.

The application discloses a self-adhesion eutectic gel electrode patch and a preparation method and application thereof, and belongs to the technical field of gel electrode materials. The self-adhesion eutectic gel electrode patch comprises the following raw materials: a carboxyl-containing monomer, polysaccharide, an initiator and a solvent; the amount of the polysaccharide is 1-10% of the mass of the carboxyl-containing monomer; and the amount of the initiator is 0.1-2.5% of the mass of the carboxyl-containing monomer. The eutectic gel electrode patch has excellent environmental stability, good conductive performance and mechanical performance in a wide temperature range of-40 DEG C to 60 DEG C, and the weight and shape of the eutectic gel remain almost unchanged under different humidity conditions. Moreover, the eutectic gel electrode patch prepared by the application has excellent adhesion, and can meet the requirements of long-time wearing and high-efficiency monitoring of patients.

This invention discloses a polyaniline / polyacrylamide / hydroxyethyl cellulose composite eutectic gel electrode material and its preparation method, belonging to the field of flexible electronic materials technology. First, a zinc chloride / ethylene glycol eutectic solvent is prepared. Hydroxyethyl cellulose, acrylamide, N,N'-methylenebisacrylamide, and a photoinitiator are fully dissolved in the eutectic solvent. After irradiation with a UV lamp, a polyacrylamide / hydroxyethyl cellulose eutectic gel is obtained. This eutectic gel is then immersed in a mixed solution of choline chloride / ethylene glycol / doped acid / aniline at room temperature. In-situ polymerization of aniline is initiated under low-temperature conditions. The resulting gel is then subjected to isothermal and humidity control to obtain the polyaniline / polyacrylamide / hydroxyethyl cellulose composite eutectic gel electrode material. The composite eutectic gel electrode material prepared by this invention exhibits good flexibility, excellent mechanical properties, superior electrochemical performance, and good environmental stability and freeze resistance, showing great development potential.

The present application relates to the technical field of biological electrode preparation, in particular to an ionic gel electrode and its preparation method and application. Plant polyphenols, acrylic ester monomers and ionic liquids with double bonds are mixed to obtain a precursor solution; the precursor solution is placed in a template for ultraviolet irradiation to obtain an ionic gel electrode. The present application uses plant polyphenols as a photoinitiator and functional components, adopts a solvent-free photoradical polymerization process, and successfully prepares a high-performance ionic gel elastomer. The material not only has excellent ion conductivity, low photoinitiator migration rate and no leakage characteristics, but also exhibits good long-term stability. The elastomer can be used as a conductive layer of a flexible sensing material or a biological electrode, and has a broad application prospect in flexible wearable devices.

This invention discloses a method for preparing a single-electrode wearable triboelectric nanogenerator based on a flexible hydrogel electrode of MXene. A mixed solution of acrylamide, tannic acid, and sodium alginate is prepared as a precursor solution A. An aqueous solution of MXene nanosheets is prepared as a dispersion solution B. Dispersion solution B is slowly added to precursor solution A. An initiator, ammonium persulfate, a crosslinking agent, N,N'-methylenebisacrylamide, and an accelerator, N,N,N',N'-tetramethylethylenediamine are added sequentially to the mixture. The mixture is then injected into a polytetrafluoroethylene mold, which is placed in an oven to allow it to stand and form a nascent gel. The nascent gel is removed from the mold and immersed in an anhydrous calcium chloride aqueous solution at room temperature to allow the carboxyl groups on the sodium alginate molecular chain to undergo ionic crosslinking with calcium ions in the solution. The gel is then removed from the anhydrous calcium chloride aqueous solution and rinsed to obtain an MXene-PAM-SA-TA composite hydrogel electrode. The surface of the MXene-PAM-SA-TA composite hydrogel electrode is reacted with a benzophenone-modified polydimethylsiloxane friction layer to fabricate a triboelectric nanogenerator.

This invention proposes a PHEMA / ionic liquid / MXene / Ti composite hydrogel electrode and develops its application method in the electrochemical detection of phenolic pollutants. Using few-layer MXene as a conductive substrate, an ionic liquid and hydroxyethyl methacrylate are introduced. A homogeneous precursor system is constructed through vortex mixing and ultrasonic dispersion. A titanium mesh is used as the electrode substrate, and UV-initiated polymerization is employed to prepare the composite hydrogel electrode in one step. The entire preparation process is simple, efficient, and low-cost. This electrode utilizes the structural support of the three-dimensional PHEMA network, the high ionic conductivity and intercalation effect of EMIMBF4, and the high conductivity and abundant surface functional groups of MXene to form a synergistic effect. This not only effectively solves the technical problems of insufficient conductivity of PHEMA alone and the easy stacking of MXene sheets, but also significantly improves the electrocatalytic activity and structural stability of the electrode. When applied to the electrochemical detection of the phenolic pollutant p-nitrophenol, this electrode exhibits excellent detection performance, with a convenient detection process, high sensitivity, and accurate and reliable results.

The application belongs to the technical field of brain-computer interface, and particularly discloses a self-adaptive dynamic electroencephalogram electrode and a preparation method thereof. The electrode effectively solves the poor wearing comfort and mechanical mismatch under dynamic activities of the existing gel electrode. The electroencephalogram electrode has a three-layer structure from bottom to top, namely a contact layer, a buffer layer and a transmission layer. The contact layer is used for contacting biological tissues, the buffer layer is used for stress buffering and signal transmission, and the transmission layer is used for connecting electronic circuits. The modulus of the contact layer is 0.1-1 kPa, the modulus of the buffer layer is 1-10 kPa, and the modulus of the transmission layer is 10-100 kPa. The core material of the electroencephalogram electrode is a polyacrylic acid skeleton and metal ions. The application realizes the stepwise change of the mechanical properties of the single-component hydrogel from bottom to top, retains the dynamic reversibility and biological safety, and realizes non-invasive, high comfort and stable signal acquisition.

This invention relates to the technical field of brain-computer interfaces and bioelectrical signal detection, and discloses a natural polymer gel electrode for electroencephalogram (EEG) detection, its preparation method, and apparatus. By mass fraction, the gel electrode comprises the following components: 2-15 parts natural polymer, 15-50 parts moisturizing agent, 50-85 parts water, 0.05-1 part preservative, and 1-8 parts conductive agent. The natural polymer is component A and component B in a mass ratio of 1-7:1. The moisturizing agent is glycerol, erythritol, and sorbitol in a mass ratio of 1-3:1-3:1. This invention, through adjusting the types and proportions of natural polymers and moisturizing agents, yields a novel gel electrode that combines high biocompatibility, high compressive strength, long-term moisturization under dry conditions, low impedance, and stable conductivity, thus promoting the development of long-term wearable brain-computer interface technology.

The application discloses a gel-based biocompatible wearable light-emitting display device and a preparation method thereof. A power supply unit is a piezoelectric gel with biocompatibility, and a display light-emitting device is realized based on an ionic gel electroluminescent material. The gel electroluminescent material constructed device can be directly powered and light-emitted by a piezoelectric generator driven by a semi-solid gel electrolyte, and the two devices are integrated in a vertical stacking mode. The piezoelectric generator device structure is constructed in a three-layer structure from bottom to top, i.e. a biocompatible bottom ionic gel electrode, a hydrogel and a top gel electrode. The display light-emitting device structure adopts a sandwich structure of a bottom ionic gel electrode, a fluorescent powder doped elastomer as a light-emitting layer and a top ionic gel electrode. The device has a certain mechanical deformation performance and can be comfortably worn on different parts of the human body. The piezoelectric effect of the gel is used to collect the mechanical energy of the human body and convert it into electrical energy to drive the electroluminescent device.