12results about How to "Improve electrical output performance" patented technology

The invention belongs to the technical field of biomedical materials, and discloses an intervertebral disc repair material based on an intervertebral disc degeneration staged treatment strategy as well as a preparation method and application of the intervertebral disc repair material. The intervertebral disc repair material comprises a sandwich-structure dual-electroactive stent and composite hydrogel attached to the dual-electroactive stent, the double-electroactive stent with the sandwich structure comprises a conductive porous stent with a conductive through pore channel structure and piezoelectric fiber films positioned on the upper side and the lower side of the conductive porous stent; the composite hydrogel comprises hydrogel and antioxidant nano enzyme uniformly dispersed in the hydrogel; the antioxidant nano-enzyme is a core-shell structure nano-particle with Co-Ni bimetallic oxide as a core and polydopamine as a shell. The degeneration early intervertebral disc is repaired through the antioxidant and anti-inflammatory nano-enzyme, the defective intervertebral disc after resection is repaired through the double electroactive scaffolds, and the electroactive scaffold enhanced composite hydrogel can replace the degeneration later intervertebral disc, so that corresponding treatment is achieved for different stages of intervertebral disc degeneration.

The invention discloses a flexible friction nano-generator material based on silk fabric and Ecoflex as well as a preparation method and application of the flexible friction nano-generator material. The invention mainly comprises a positive friction layer material SF / beta-LGF / ZnO and a negative friction layer material Ecoflex / Ag-MMT. Specifically, the positive friction layer is prepared through the following steps that firstly, beta-lactoglobulin is converted into amyloid fibril at the specific pH and temperature, then beta-LGF is loaded on the surface of silk fabric through a cross-linking agent, and a ZnO film grows on the surface of the silk fabric through the atomic layer deposition technology. The negative friction layer is based on biodegradable Ecoflex, and the electrical property of the negative friction layer is improved by doping Ag intercalated montmorillonite. According to the invention, not only are the electron donating and electron withdrawing capabilities of the silk fabric and Ecoflex enhanced, but also the electric output performance of the friction nano-generator is remarkably improved, and low-frequency mechanical energy can be efficiently converted into electric energy.

The present invention relates to a friction nanogenerator with a multilayer friction layer, and its preparation and application. The generator comprises a substrate, a positive friction layer, a negative friction layer, an electrode, a wire and a connecting spring. The negative friction layer is composed of a silicone rubber-wrapped Mxene / melamine foam layer and a TiO2 nanotube array self-adsorbed, i.e., a Mxene / melamine foam layer / silicone rubber / TiO2 layer. The Mxene / melamine foam layer / silicone rubber / TiO2 layer can effectively improve the charge density of the friction nanogenerator by electron transfer and capture, and further improve the electrical output performance of the friction nanogenerator. The friction nanogenerator can convert mechanical energy in the environment into electrical energy, and can be widely used in the field of electrochemical cathode protection.

The invention provides a preparation method and application of friction nanometer power generation yarn and fabric with good flame retardance and smoke suppression performance, and belongs to the technical field of spinning. The flame-retardant polyester filaments and the polytetrafluoroethylene filaments are woven on the outer side of the silver-plated nylon yarn to form the outer friction layer, the skin-core structure composite yarn containing the conductive inner core is prepared, then the friction nanometer power generation fabric with good flame-retardant and smoke-suppression performance is prepared through weaving, the obtained fabric is excellent in flame-retardant performance and electric output performance, and the fabric is good in flame-retardant and smoke-suppression performance. And the fabric shows excellent cycle working stability and washing resistance, is high in air and moisture permeability and good in comfort, and can be used in intelligent protective clothing and intelligent escape blankets.

The invention discloses a triboelectric material and a preparation method and application thereof, and belongs to the technical field of friction materials. The preparation method of the triboelectric material comprises the following steps: adhering SiO2 to a cellulose skeleton to obtain a cellulose material adhered with SiO2; and adding a Ti3C2Tx dispersion liquid to the cellulose material attached with SiO2, and drying to obtain the triboelectric material. The Ti3C2Tx-SiO2-CFP (TS-CFP) prepared by the invention can promote more triboelectric charges to be transferred into the material and firmly capture the charges in a deep trap to prevent the charges from being dissipated, so that high-output and durable TENG is obtained.

The invention discloses a foamy copper framework-based heterogeneous material for a friction nano-generator and a preparation method and application thereof, the foamy copper framework-based heterogeneous material takes foamy copper as a framework and platinum catalytic silicone rubber as a filler, and the foamy copper and the platinum catalytic silicone rubber form a three-dimensional interpenetrating structure. The preparation method comprises the following steps: (1) firstly putting foamy copper into absolute ethyl alcohol for ultrasonic cleaning, and then putting the foamy copper into diluted hydrochloric acid for ultrasonic cleaning; (2) preparing a platinum catalyzed silicone rubber liquid; (3) pouring platinum catalytic silicon rubber liquid into the foamy copper until pores of the foamy copper are completely filled with the platinum catalytic silicon rubber liquid; (4) after pouring is completed, the mold is transferred to be subjected to exhaust treatment under the ultrasonic condition; and (5) the mold is placed in a drying box to be subjected to curing treatment. The foamy copper framework-based heterogeneous material for the friction nano-generator prepared by the invention can be used for a three-dimensional electrode of the friction nano-generator, and the electric output performance of the friction nano-generator can be effectively improved.

The application discloses a preparation method of an ionic hydrogel-based humidity generator for efficient power generation and self-powered sensing. By preparing an ionic hydrogel prepolymer solution rich in active functional groups, a pre-polymer hydrogel is formed by short-time initial ultraviolet irradiation. After the pre-polymer hydrogel is transferred to the surface of an electrode, secondary ultraviolet irradiation is performed to enable chemical bonding and interpenetrating network structure between the hydrogel and the electrode. Finally, an active metal top electrode is attached. Through the synergistic design of the two-step curing method and the active electrode, on the one hand, the firm interface combination of the hydrogel and the electrode is realized, and the contact impedance is significantly reduced; on the other hand, the additional output is generated by the redox reaction between the active electrode and the hydrogel, thereby greatly improving the electrical output performance of the device. The obtained generator has excellent electrical output performance in a wide temperature and humidity range, and can be integrated for power supply and used as a high-sensitivity self-powered sensor, and has application prospects in the field of flexible wearable devices.

The present invention belongs to the technical field of biomedical materials, and discloses a disc repair material based on a staged treatment strategy for disc degeneration, and its preparation method and application; the disc repair material includes a sandwich structure dual electroactive stent, and a composite hydrogel attached to the dual electroactive stent; the sandwich structure dual electroactive stent includes a conductive porous stent with a conductive through-channel structure and a piezoelectric fiber film located on the upper and lower sides of the conductive porous stent; the composite hydrogel includes a hydrogel and an antioxidant nanozyme uniformly dispersed in the hydrogel; the antioxidant nanozyme is a core-shell structure nanoparticle with Co-Ni bimetallic oxide as the core and polydopamine as the shell. The present invention repairs the early degenerative disc through antioxidant and anti-inflammatory nanozymes, repairs the defective disc after resection with a dual electroactive stent, and the composite hydrogel enhanced by the electroactive stent can replace the late degenerative disc, thereby achieving corresponding treatment for different stages of disc degeneration.

The invention discloses a coupled biomass-based nano generator with both PENG and TENG and a preparation method of the coupled biomass-based nano generator. Belongs to the technical field of nano-generators. By regulating PVDF-HFP and regenerated cellulose molecular chains to form inter-chain hydrogen bonds,-F chemical bonds with huge electronegativity in regenerated cellulose / PVDF-HFP can provide a good triboelectric effect, meanwhile, added KNN nano-particle filler can be effectively loaded in a regenerated cellulose matrix, good piezoelectric performance is provided, and the piezoelectric effect is good. And the prepared nano generator has excellent piezoelectric and frictional electricity output performance. According to the invention, the idea is simple and clear, the KNN nanoparticle filler is added into the regenerated cellulose, the electrical output performance is further enhanced, and the prepared coupled biomass-based nano generator with both PENG and TENG has sufficient environmental friendliness and has wide application prospects.

The invention belongs to the technical field of electronic devices, discloses a branch heterostructure piezoelectric fiber, a piezoelectric nano-generator and a preparation method and application of the branch heterostructure piezoelectric fiber and the piezoelectric nano-generator, and aims to solve the problem of low effective polarization voltage on piezoelectric filler in a flexible piezoelectric nano-generator. According to the invention, barium titanate-based nanospheres (BCZT-SP (at) Ag) coated with nano Ag are'grafted 'on the surface of barium titanate-based fiber by combining a chemical gel method and a coaxial electrostatic spinning technology, so that the branch and trunk heterostructure piezoelectric fiber (BCZT-NF (at) BCZT-SP (at) Ag) is prepared. The BCZT-SP (at) Ag with the heterostructure on the surface of the fiber can regulate and control the interface area to enhance the activity of carriers near the piezoelectric filler so as to improve the effective polarization electric field, thereby improving the PENG output performance. Polyvinylidene fluoride is used as a flexible substrate, PENG based on a BCZT-NF (at) BCZT-SP (at) Ag / PVDF composite film is prepared, and the PENG can provide high piezoelectric output. The PENG prepared by the technology can be applied to a power grid, and a lead vibration sensing and monitoring system based on the PENG is constructed.

The invention discloses a live-algae-based light synergism hydroelectric generator, which comprises a top electrode, a live-algae biological membrane and a bottom electrode, and is characterized in that the upper surface of the live-algae biological membrane is connected with the top electrode in an attached manner, and the lower surface of the live-algae biological membrane is connected with the bottom electrode in an attached manner. According to the light-synergism water photovoltaic power generator based on the living algae, a complex self-assembly process is not needed, moisture and solar energy in the environment are spontaneously captured by means of rich chlorophyll and water absorption cells in the living algae biological membrane, continuous and autonomous power generation is achieved, the adopted living algae biological membrane is good in overall surface appearance, and the service life of the living algae biological membrane is prolonged. Chap does not easily occur under the condition of dry air, the storage is easy, and the healing effect is good; under the condition that the humidity is 90%, the living algae biofilm with the area of 1.75 cm < 2 > generates a short-circuit current of about 0.57 microamperes and an open-circuit voltage of 0.52 V, and the short-circuit current and the open-circuit voltage are kept stable, so that the device has good power generation performance and stability, has a wide application prospect in the field of energy supply, and promotes the development of a sustainable energy technology.

This invention discloses an accelerometer based on a single-end cantilever structure with dual graphene and its fabrication method, belonging to the field of semiconductor device processing and manufacturing technology. The method involves growing silicon dioxide thin films on the front and back sides of a substrate using plasma-enhanced chemical vapor deposition (PECVD) to prepare an insulating layer and a hard mask layer. Metal markers and metal electrodes are fabricated on the insulating layer using a lift-off process or dry etching. The insulating layer is patterned using plasma etching, followed by deep silicon etching to pattern a silicon-based mass block. Cavity etching is performed on the back side of the substrate using both plasma etching and deep silicon etching. A two-dimensional material film, comprising a single-layer / double-layer graphene film, is transferred to the front side of the substrate and patterned. The mass block is then released using plasma etching and hydrogen fluoride vapor phase etching, completing the fabrication of the accelerometer based on the single-end cantilever structure with dual graphene.