10results about How to "Improve electrical activity" patented technology

The invention relates to the technical field of flexible stimulation response self-drivers, in particular to a preparation method of an electricity-temperature dual stimulation deformation reversible composite material driver, which comprises the following steps: firstly, carrying out chemical modification and solution ultrasonic dispersion on conductor particles to improve interface cohesiveness and improve interface bonding between a conductor and a polymer; melting, blending and compounding polyethylene vinyl acetate free radical double-group coupling by using a double-screw mixer to prepare a shape memory hemicrystalline and carbon-carbon single bond net-shaped cross-linked molecular network structure; uniformly doping and embedding conductor unit particles into a molecular network to construct a conductive three-dimensional network, and forming a conductive blend with a bicontinuous phase structure; and finally, thermally pressing the conductive blend to initiate a macromolecular free radical cross-linking reaction to prepare the electric-temperature dual-stimulation deformation reversible composite material driver with a conductive-semi-crystalline-cross-linked three-dimensional network structure. According to the invention, electric and thermal dual stimulation reversible deformation response of the shape memory composite material can be realized.

A method for detecting GP73 by constructing a dual-signal aptamer sensor based on a nanocomposite and quantum dots comprises the following steps: modifying the surface of a screen-printed electrode with nanogold, and fixing a GP73apt2-BNCQD capture probe on the surface of the electrode through an Au-SH bond to increase the conductivity; the preparation method comprises the following steps: preparing an NSrGO-H-MoS2-GP73apt1 signal probe; therefore, the sandwich type electrochemical aptamer sensor is constructed. H2O2 is catalyzed by the peroxidase-like property of the NSrGO-H-MoS2 to oxidize TMB into oxTMB, and an electrochemical signal YTMB is obtained; meanwhile, Fe (II) in Hemin in the NSrGO-H-MoS2 nano composite material is oxidized into Fe (III), another electrochemical signal YHemin is obtained, and the two signals prove each other, so that double-signal accurate detection of GP73 is realized.

The invention discloses a polylactic acid-based nanofiber membrane as well as a preparation method and application thereof, and belongs to the technical field of air filtering membrane materials, fibers of the polylactic acid-based nanofiber membrane provided by the invention are formed by compounding an electroactive heterostructure layer and a dextrorotation polylactic acid layer, and the electroactive heterostructure layer is formed by a levorotation polylactic acid layer, an electret and a nucleating agent. According to the polylactic acid-based nanofiber membrane prepared by the preparation method disclosed by the invention, the PMs filtering efficiency reaches 99.0%-99.99%, the surface potential is maintained at 12 kV to 18 kV, the breathing resistance is 90 Pa to 180 Pa, the antiviral efficiency is 99.0%-99.98%, and the bacteria filtering efficiency is 99.2%-99.98%. According to the invention, the electroactivity and hydrophobicity of the nanofiber membrane are enhanced by combining a polylactic acid interface stereochemical compound with an electroactive heterostructure, so that the nanofiber membrane has the characteristics of fouling resistance (microorganisms, blood, dyes and the like) and high air filtration performance.

This invention relates to the field of electrochemical technology, and particularly to a single-atom nickel-modified electrode material, its preparation method, and a reactor. An embodiment of this invention provides a method for preparing a single-atom nickel-modified electrode material, comprising: S1, subjecting a carbon felt to a surface hydrophilic treatment to obtain a hydrophilic carbon felt; S2, immersing the hydrophilic carbon felt in a first solution containing Ni ions, and adding a second solution containing organic matter, allowing for a complete reaction, and then growing a nickel-containing metal-organic framework material in situ on the hydrophilic carbon felt; S3, calcining the hydrophilic carbon felt containing the nickel-containing metal-organic framework material to obtain the single-atom nickel-modified electrode material. This invention provides a single-atom nickel-modified electrode material, its preparation method, and a reactor, which can provide a cathode material that combines efficient microbial colonization with interfacial stability.

The application discloses a kind of biocompatible materials and preparation method for bionic porous intervertebral fusion cage, belong to intervertebral fusion cage material technical field.A kind of biocompatible materials for bionic porous intervertebral fusion cage, by weight parts includes the following components: polyether ether ketone 65-80 parts, modified functional filler 15-25 parts, hydroxyapatite 8-12 parts, flow modifier 0.5-1 part;The modified functional filler is graphene oxide coated modified barium titanate functional filler.By introducing surface conductive modified nano piezoelectric ceramic particles, realize the effective conversion and transmission of mechanical stimulation to bioelectric signal, this microstructure design makes the insulating polyether ether ketone matrix possess the electric activity of simulating natural bone stress-electric signal response mechanism, so as to be favorable to activate osteoblast activity and promote bone integration of implant interface.

The invention discloses an immune biosensor of a human tissue plasminogen activator antigen, and designs a compound for modifying the immune sensor, a compound solution is dropwise added on the surface of an electrode of the immune biosensor by adopting a dispensing method to form a compound film, and then an aldehyde group is introduced into the solution to modify the surface of the film, so that the immune biosensor is obtained. An aldehyde group is introduced to be combined with a to-be-detected object antibody. NPC, MWCNTs and AuNP are dispersed in a chitosan solution, the electroactivity of an electrode interface is improved, the effective area of electrochemical reaction is increased, the sensitivity of the electrode is improved, and large-range active sites are provided while electrochemical signals are increased; the linear range of the immunosensor is relatively large, and human tissue plasminogen activator antigen detection in a normal concentration range can be realized.

The application provides a preparation method of a composite dielectric elastomer film and a dielectric elastomer film actuator. The preparation method comprises the following steps: step 1: mixing BTRU@CDs giant electro-rheological particles with an electro-rheological liquid dispersion phase to obtain a suspension; step 2: uniformly mixing silicone rubber with the suspension to obtain a composite dielectric elastomer prepolymer, wherein the mass ratio of the silicone rubber to the suspension is 15:1 to 1:1, and the mass ratio of the BTRU@CDs giant electro-rheological particles in the composite dielectric elastomer prepolymer is 5-40%; and step 3: film forming is performed on the composite dielectric elastomer prepolymer to obtain a composite dielectric elastomer film. The composite dielectric elastomer film prepared by the preparation method of the composite dielectric elastomer film has better actuating performance, better mechanical performance and better cycle stability than traditional rubber elastomers. The problems of high driving voltage, large pre-stretching ratio, limited actuating strain, poor fatigue resistance and easy breakdown of existing dielectric elastomer materials are solved.

The application belongs to the field of biomedical materials, and particularly relates to a self-polarization degradable gradient electroactive hydrogel as well as a preparation method and application thereof. The application develops a novel degradable electroactive scaffold based on a high-electroactive natural macromolecule hydrogel, and through material component regulation and control and structure design, the piezoelectric performance of the scaffold is significantly improved, and the synergistic precise regulation and control of the scaffold on bone and cartilage regeneration are realized. Through the combination of electron transfer and ion transfer, the pathological electrical requirements of bone and cartilage regions are respectively adapted, and through the differential regulation and control of the electrical microenvironment and the material structure, the efficient bionics and bidirectional repair of the bone-cartilage interface are realized.

The invention discloses an anodized aluminum oxide / polyvinylidene fluoride trifluoroethylene thin film and preparation of the anodized aluminum oxide / polyvinylidene fluoride trifluoroethylene thin film. The anodic aluminum oxide / polyvinylidene fluoride trifluoroethylene film is composed of an upper PVTF film layer subjected to polarization treatment and a lower anodic aluminum oxide film layer and serves as an electroactive Janus composite film, the two sides of the film have asymmetric properties and structures including wettability, conductivity and chemical activity, and the film has adjustable surface potential. A bone repair structure and an electrical microenvironment can be simulated at the same time, cell behaviors are regulated and controlled, and tissue repair and regeneration are promoted.

The present invention provides a nerve sheath tube and a preparation method and application thereof, belonging to the technical field of biomedical material development. The nerve sheath tube provided by the present invention solves the problem of limited mechanical properties of related materials in the prior art by optimizing materials and preparation methods. The nerve sheath tube of the present invention has many significant advantages: it has excellent biocompatibility and is highly compatible with human tissue; the residual additives during the processing process are extremely small, ensuring the biosafety of the product; the nerve sheath tube has good flexibility, which is convenient for surgical operation and avoids compression of surrounding tissues after implantation; due to the addition of graphene, the nerve sheath tube exhibits electrical activity, providing a new way for nerve tissue repair and functional detection. These characteristics make the nerve sheath tube of the present invention have broad application prospects in the biomedical field.