33results about How to "Act as a buffer layer" patented technology

The invention discloses an antibacterial and odor removing fiber bed core. The fiber bed core comprises at least one middle layer and a surface layer which is arranged on the upper surface or the lower surface of the middle layer, wherein the surface layer comprises a non-woven fabric prepared from the following components in percentage by weight: 15-40% of low melting point fibers and 60-85% of polyester fibers; and the middle layer comprises the following components in percentage by weight: 60-85% of raw bamboo fibers and 15-40% of low melting point fibers. The invention further discloses a preparation method of the fiber bed core; and the preparation method comprises the following steps: respectively preparing each layer including an upper surface layer, a lower surface layer and the middle layer; laying the upper surface layer, the lower surface layer and the middle layer in sequence; drying the upper surface layer, the lower surface layer and the middle layer in a drying box; and coldly rolling, cooling, cutting, inspecting and packaging the upper surface layer, the lower surface layer and the middle layer. The fiber bed core disclosed by the invention has the advantages as follows: antibacterial and odor removing properties, elasticity and bulkiness, healthcare property, ultraviolet resistance, moisture absorbing and removing properties and environment friendliness of the fiber bed core are greatly improved when being compared with those of a traditional mattress.

The invention relates to a reduced graphene oxide/stannate sodium ion battery negative electrode material and a preparation method and application thereof. The preparation method comprises the following steps: dispersing an aqueous solution of chlorate and sodium stannate in a graphene oxide solution, performing a hydrothermal reaction to produce a suspension, performing solid-liquid separation toobtain a precipitate, and calcinating the precipitate at high temperature to obtain the reduced graphene oxide/stannate sodium ion battery negative electrode material, wherein the chlorate is manganese chloride, cobalt chloride hexahydrate or zinc chloride. Compared with the prior art, the preparation method provided by the invention has the advantages of a simple technology, easy process control, easy obtainment of raw materials, low cost and good repeatability. A prepared reduced graphene oxide/stannate (manganese stannate, cobalt stannate and zinc stannate) composite structure has good electrochemical sodium storage performance, and is a good sodium ion battery negative electrode material.

The invention discloses a metal oxide semiconductor field effect transistor (MOSFET), comprising a silicon substrate and a source and a drain which are formed by doped silicon-germanium polymers, wherein buffer layers formed by injection of germanium plasmas are respectively arranged between the silicon substrate and the source as well as between the silicon substrate and the drain. The invention also discloses a manufacturing method of the MOSFET. The invention can effectively avoid the defects caused by stress relaxation of the silicon-germanium polymer layers.

The invention relates to a polymer solar battery and a preparation method of the polymer solar battery. The polymer solar battery comprises an anode substrate, a cavity buffer layer, an active layer and a metal cathode which are sequentially stacked, and also comprises an inorganic layer arranged between the active layer and the metallic cathode.\The polymer solar battery comprises the active layer/ inorganic layer structure, the distribution of an optical field in the active layer can be improved, so that a generating region of a carrier is changed, a good place is provided for exciton dissociation, and meanwhile, the transmission efficiency of the carrier is improved; and a contacting interface of the active layer and the cathode is separated, so that metal atoms are prevented from diffusing to the active layer to further destroy the structure of the active layer, the role of a buffering layer is played, and the collection efficiency of electrons at the position of the electrode is improved.

The invention relates to a CF/PPS composite material with high impact toughness and a preparation method of the CF/PPS composite material. The preparation method comprises the following steps: (1) carrying out high-temperature decomposition on an original sizing agent on the surface of CF; (2) simultaneously carrying out microwave radiation and ultraviolet irradiation on CF in a saturated water vapor environment, and marking a product as ACF; (3) immersing the ACF into polyether sulfone/dimethylformamide, and drying to obtain sized carbon fiber MCF; (4) laminating and hot-pressing the MCF anda PPS material; (5) cooling to a certain temperature at a rate of 50-70 DEG C/min after hot pressing is finished, applying a certain pressure, maintaining the pressure for a period of time, and then relieving the pressure to obtain the CF/PPS composite material with high impact toughness. The tensile strength of the composite material is 650-820 MPa, the tensile modulus of the composite material is 50-63 GPa, the interlaminar shear strength of the composite material is 60-80 MPa, and the residual compression strength of the composite material after impact is 260-300 MPa. The method disclosed by the invention has the characteristics of high efficiency, environmental friendliness and capability of realizing large-scale production, and the prepared composite material can replace metal to be applied to the fields of aerospace, machinery, automobiles, rail transit, petroleum transportation and the like.

The invention relates to a pressure-responsive fragrant sustained-release microcapsule, and a preparation method and an application thereof. The microcapsule comprises a core material and a wall material coated outside the core material. The preparation method comprises the following steps: dispersing an essence-adsorbed porous silicon dioxide powder into deionized water under stirring, adding nanometer silicon dioxide, natural latex and a cross-linking agent I for cross-linking so as to prepare the pressure-responsive fragrant sustained-release microcapsule. The pressure-responsive fragrant sustained-release microcapsule is applied through the following steps: adding the natural latex into the prepared microcapsule, then adding a cross-linking agent II and the deionized water, carrying out uniform dispersing, injecting a dispersion into a mold, carrying out drying, cross-linking and cooling so as to prepare an elastic material, and coating an EVA hot melt adhesive onto two sides of the elastic material so as to prepare an elastic carpet. According to the invention, the preparation method is simple; raw materials are easily-available; and the essence release speed of the fragrant sustained-release microcapsule has a certain relationship with the pressure that the fragrant sustained-release microcapsule bears, so the release effect of an essence in the interior of the microcapsule is effectively improved; the usage amount of perfumes is saved; the service life of the carpet is prolonged; and significant application prospects are achieved.

The invention relates to the field of bulletproof materials and discloses a bulletproof polyurethane-fiber composite material and a preparation method thereof. The polyurethane-fiber composite material comprises the following components in percent by weight: 20wt.%-60wt.% of fiber and 40wt.%-80wt.% of polyurethane composition, wherein the polyurethane composition is prepared by mixing a componentA and a component B according to the volume ratio of 1-10:1; the component A is isocyanate prepolymer synthesized by 40wt.%-60wt.% of isocyanate and 40wt.%-60wt.% of polymer polyol; the component B isprepared by mixing 25wt.%-30wt.% of chain expanding agent, 20wt.%-45wt.% of aerogel, 0.1wt.%-1wt.% of dispersing agent, 20wt.%-30wt.% of filler and 0.1wt.%-1wt.% of catalyst. The polyurethane-fiber composite material and the preparation method disclosed by the invention have the beneficial effects that the instantaneous deformation resistance and capability of responding to bad weather environment of a bulletproof plate can be enhanced, and better protection can be provided for the material and structure of a bullet inserting plate, so that the protective capability and the service life of the bulletproof plate are improved; simultaneously, due to good toughness of the polyurethane material, certain buffering-layer action also can be achieved, and the damage caused by deformation of the bulletproof inserting plate can be reduced.

The invention provides a static induction thyristor and a manufacturing method thereof, and solves the problem that an SITH obtained in the prior art cannot meet the latest use requirements. A first highly-doped region is added to a positive electrode region of a device, so that a parasitic transistor is formed; the conduction voltage drop of the SITH is reduced, and meanwhile, the injection efficiency of a positive electrode is reduced by the first highly-doped region of the positive electrode region, so that the reverse recovery time is shortened, and the reverse recovery charge is also obviously reduced; and the final SITH device has a higher switching speed and lower switching loss. An epitaxial layer is also added between a fourth highly-doped region and a substrate, so that the effect of a buffer layer is achieved; during the reverse recovery period, the electric field intensity of the substrate and the epitaxial layer is reduced and the extraction speed of carriers is reduced, so that high-voltage oscillation is remarkably reduced, and a softer recovery characteristic is obtained; and the reverse recovery charge is less, so that the power consumption of the device is furtherreduced.

The invention relates to the technical field of pressure measurement, and provides a wide-range high-toughness nanoscale conductive rubber sensor, a preparation method thereof and a packaging method thereof. The preparation method adopts a high-temperature internal mixing method to improve the dispersion of conductive filler, and a sandwich structure is cured under a high-pressure condition, so that a rubber structure is more compact. The nanoscale conductive rubber sensor prepared according to the preparation method is wide in measurement range, high in sensitivity, and high in stability. According to the wide-range high-toughness nanoscale conductive rubber sensor, the preparation method thereof and the packaging method thereof, a rubber matrix is used for packaging the nanoscale conductive rubber sensor, and a case, a cover plate and a sealing cover are used for sealing the rubber matrix packaged with the sensor so as to achieve an ingenious packaging structure. Therefore, the sensor is stressed in a balanced manner, and the situation of structural damage caused by stress concentration is avoided. Meanwhile, through the packaging of the rubber matrix, the whole sensor has the excellent characteristics of high-temperature resistance, water resistance, fire resistance, ultraviolet resistance, acid and alkali corrosion resistance and the like, and is better in aging-resistant stability, and longer in service life and high in safety under a high-load condition.

The invention discloses a sapphire pattern substrate structure capable of improving the luminous efficiency of a GaN-based LED. The sapphire pattern substrate structure comprises: a sapphire pattern substrate and a sandwich reflection structure deposited on the sapphire pattern substrate. The sandwich reflection structure consists of a first Al2O3 multilayer structure deposited on the sapphire pattern substrate, a Bragg reflector deposited on the first Al2O3 multilayer structure, and a second Al2O3 multilayer structure deposited on the Bragg reflector. Therefore, the quality of the GaN-based LED material and the luminous efficiency of the GaN-based LED are improved. The sapphire pattern substrate structure has the great commercial value.