42results about How to "Retain conductivity" patented technology

The invention discloses a photoelectric detector based on PtSe2 and a silicon nanorod array and a preparation method of the photoelectric detector. The photoelectric detector comprises a PMMA light-transmitting protective layer, a transparent upper graphene electrode, a silicon nanopillar array structural body coated with few layers of PtSe2, and a metal electrode of the transparent upper graphene electrode and the silicon nanopillar array structural body. The preparation method comprises the following steps: preparing graphene by a CVD method; preparing a silicon nanopillar array structural body by dry etching; coating the surface of the silicon nanopillar array structure body with a few layers of PtSe2 by laser interference enhanced induction CVD; preparing the transparent upper graphene electrode; and plating the metal electrode through magnetron sputtering. The photoelectric detector prepared by the invention can realize detection in a range of visible light to near-infrared bands; and the silicon nanopillar array structure enhances the light absorption effect of the detector, so the detector has the advantages of high sensitivity, simple device structure and high practicability. Meanwhile, the preparation method can improve the performance of the detector, and has a relatively high popularization value.

The invention belongs to the technical field of high-molecular materials, and especially relates to a preparation method for a polyolefin-kind high-molecular obstruction explosion-proof material. The method comprises fully drying polyolefin, a fire retardant, an antistatic agent, a flexibilizer and various auxiliary agents, uniformly mixing in a high-speed mixer, then adding into a screw-combined co-rotating conical twin-screw extruder with an appropriate length-diameter ratio, setting the extruder temperature to be 160-280 DEG C, performing cooling and heating processing, then sending into a slitting system, and cutting into an obstruction explosion-proof polyethylene material pellet with a fixed length, so as to prepare the obstruction explosion-proof material which is cheap in price, easy to process and excellent in performances.

The invention provides a preparation method of polyimide fiber far infrared emission paper, wherein the preparation method comprises the following steps: mixing polyimide fiber slurry, a carbon nanotube dispersion liquid, polyacrylate and cationic polyacrylamide to obtain mixed slurry; coating a single side of the substrate with the mixed slurry, curing, and forming a curing layer on the single side of the substrate; and peeling the substrate, and carrying out hot press molding of the obtained curing layer, to obtain the polyimide fiber far infrared emission paper. The polyimide and carbon nanotube slurry is coated, hot-pressed and molded, and the polyimide fiber far-infrared emission paper is obtained; not only are good electric conductivity and far-infrared emission performance of the carbon nanotubes retained, but also good mechanical properties of polyimide are retained. As a far-infrared emitter, the emission far-infrared wavelength is 4-18 [mu]m, and the conversion efficiency ofelectric energy radiation can reach 90% or more.

The invention relates to a synthetic method of a graphene-waterborne epoxy high-dispersion system. The method comprises steps as follows: step 1, glycidyl ether type epoxy resin and double-end amino micromolecular amine are subjected to an addition chain extension reaction, and an amino-terminated hydrophilic polyether chain segment is obtained; step 2, the amino-terminated hydrophilic polyether chain segment and a macromolecular epoxy group are subjected to an addition chain extension reaction, and an amino-terminated long-chain non-ionic self-emulsifying epoxy curing agent is obtained; step 3, low-oxidation graphene is prepared with an ultrasonic assisted Hummers method; step 4, the non-ionic self-emulsifying epoxy curing agent and low-oxidation graphene are subjected to a covalent grafting modification reaction, and the graphene-waterborne epoxy high-dispersion system is obtained. The synthetic method has the advantages as follows: the long-chain non-inoic self-emulsifying epoxy curing agent is grafted on the surface of graphene through a nucleophilic opening ring reaction, re-agglomeration of a graphene sheet layer is inhibited to a certain extent, the electric conductivity of graphene is retained, and the comprehensive mechanical performance and modulus of the graphene-waterborne epoxy high-dispersion system are improved effectively.

The invention discloses a swing electromagnetic induction type power generation flexible fabric, a production method and application thereof. The oscillating electromagnetic induction type power generation flexible fabric of the present invention includes magnetic yarn fabrics and conductive coil fabrics respectively located on the surfaces of two relative swinging parts; the magnetic yarn fabrics include magnetic yarn cores formed by composite fiber strips wrapping magnetic powder; the The conductive coil fabric is formed by embroidery of conductive silk core-spun yarn strands on the fabric substrate. In the present invention, the magnetic powder is evenly wrapped in the yarn, and a stable magnetic yarn fabric is prepared by a weaving method, and then used in combination with a conductive coil fabric containing conductive filaments to produce a flexible fabric that can generate electricity; Flexible fabrics can be applied to clothing, and use electromagnetic induction to convert the mechanical energy generated by the human body's arm swing / walking process into electrical energy, which ensures the softness of the clothing while realizing power generation, meets the needs of actual use, and has great application value.

The invention provides a method for dyeing conductive polyester fibers, mainly comprising the following steps of: desizing the conductive polyester fibers with desizing solution; carrying out alkali reducing treatment on the desized conductive polyester fibers in alkali reducing solution; dyeing the conductive polyester fibers, which is subjected to the alkali reducing treatment, in dyeing solution; carrying out reduction clearing treatment on the dyed conductive polyester fibers in reduction clearing solution; and taking out and drying the conductive polyester fibers. By adopting the dyeing method provided by the invention, a dyeing technological process and parameters are optimized, influence of dyeing and finishing processes on antistatic property, rate of dye-uptake, colour fastness and handfeel of the conductive polyester fibers and fabric is reduced, conductive effect of the fabric is maintained to the utmost extent, and the rate of dye-uptake of dye and colour fastness are improved.

The invention specifically relates to a preparation method for a flexible vertically-aligned carbon nanotube array covered with thin-layer carbon, belonging to the field of preparation of flexible vertically-aligned carbon nanotube arrays. The preparation method comprises the following steps: depositing a thin layer of carbon on the surface of a substrate through plasma deposition; then growing carbon nanotubes by using a plasma-enhanced chemical vapor deposition method so as to obtain a composite structure of a vertically-aligned carbon nanotube array covered with the thin-layer carbon, wherein the thin-layer carbon located at the top allows the carbon nanotubes in the vertically-aligned array to be interconnected so as to guarantee that all the carbon nanotubes in the array participate in heat transfer; simply pressing the vertically-aligned array and peeling the vertically-aligned array from the substrate so as to obtain the self-supported flexible vertically-aligned carbon nanotubearray. The prepared self-supported flexible vertically-aligned carbon nanotube array has excellent thermal conductivity, good bendability and strong adhesion, and has good application prospects in the fields of flexible thermal interface materials and flexible energy storage materials.

The invention belongs to the field of display technology, and in particular relates to a quantum dot light-emitting diode and a preparation method thereof. A quantum dot light-emitting diode, comprising an anode, a cathode, and a quantum dot light-emitting layer between the anode and the cathode, an electron transport layer is also arranged between the cathode and the quantum dot light-emitting layer, and the electron The material of the transmission layer is graphyne fluoride. Such fluorinated graphyne is used in the electron transport layer of the quantum dot light-emitting diode device, which not only has the advantages of high electron transport efficiency, but also has a high degree of matching with the quantum dot light-emitting layer, and finally improves the light-emitting performance of the device.