3651results about How to "Improve breathability" patented technology

The invention relates to the technical field of crop cultivation, in particular to a water and fertilizer regulation and control method and system for saline-alkali soil grain-feed crops, and the method comprises the following steps: S1, soil preliminary improvement and crop selection: performing preliminary improvement on saline-alkali soil; s2, dynamically predicting, regulating and controlling the soil conductivity: monitoring and dynamically predicting the change trend of the soil conductivity in real time; s3, formulating a water and fertilizer management strategy: formulating the water and fertilizer management strategy; s4, dynamic optimization of saline-alkali soil moisture evaporation: acquiring environmental data in real time, and performing dynamic optimization management on the moisture evaporation process of the saline-alkali soil; s5, crop root health monitoring and feedback regulation and control: identifying salt damage or water and fertilizer absorption obstacles, and adjusting a water and fertilizer management strategy in real time; s6, final-period management and soil ecological restoration, wherein ecological restoration is conducted on the saline-alkali soil. According to the invention, salt damage or water and fertilizer absorption obstacles are identified and solved in time, and healthy growth of crops is further ensured.

The invention belongs to the technical field of composite fiber materials, and relates to a functional thermal management fabric, in particular to a phase change microcapsule doped flexible cooling fiber fabric and a preparation method thereof. The fabric has a controllable double-layer structure and is formed by assembling nanofibers and micro-nanofibers doped with a large number of phase change microcapsules. Wherein the micro-nano fiber layer has relatively high sunlight reflectivity and atmospheric window wave band emissivity, and shows an excellent radiation cooling effect; the microcapsule content of the nanofiber layer doped with a large amount of phase change microcapsules is not less than 10 wt%, and the nanofiber layer has no rupture phenomenon, has high heat storage capacity, not only makes up for the deficiency of radiation cooling capacity, but also effectively slows down temperature fluctuation. The radiation cooling technology and the phase change latent heat technology are combined, so that the long-time temperature control performance of the fabric is realized, and the thermal shock resistance is enhanced. In addition, the fabric also has excellent mechanical property, flexibility, washability, air permeability, moisture penetrability and sunscreen property.

The invention relates to the technical field of battery diaphragms, in particular to a composite coating diaphragm for a lithium ion battery and a preparation method of the composite coating diaphragm, and the preparation method comprises the following steps: coating aramid polymer slurry on a base membrane, and carrying out coagulating bath forming and drying treatment to obtain an aramid coating diaphragm intermediate; the aramid polymer slurry comprises a cross-linked structure aramid polymer solution, a pore-foaming agent and a cosolvent; the weight-average molecular weight of a cross-linked structure aramid polymer in the cross-linked structure aramid polymer solution is 15-30 W; and coating the surface of the aramid fiber coated diaphragm intermediate with a TiO2 treatment solution, and finally performing drying treatment to obtain the composite coated diaphragm. The TiO2 treating fluid is prepared from TiO2 sol and a water-based adhesive. The composite coating diaphragm has higher heat resistance, diaphragm rupture temperature, puncture strength and low water absorption performance; and after the battery is assembled, the battery shows better electrochemical and safety performance.

The invention relates to regenerated cellulose fiber as well as a preparation method and application thereof. Comprising the following steps: dissolving a cellulose raw material in a solvent; adding a pore-forming agent, a dispersing agent and a cross-linking agent, mixing, and carrying out vacuum defoaming; spinning: enabling the stock solution trickles to sequentially pass through a first coagulating bath, a second coagulating bath and a third coagulating bath; the first coagulating bath is an acidic solution, so that a hollow structure is formed in the fiber; forming a nano-scale pore structure on the outer layer of the fiber in the second coagulating bath; the acid introduced by the first coagulating bath and the solvent introduced by the second coagulating bath are replaced by the third coagulating bath through solvent exchange, and meanwhile, the fibers are gelatinized to form a three-dimensional network structure; and drafting, drying, curling and winding the nascent cellulose fiber to obtain the regenerated cellulose fiber. The technical problem to be solved is how to enable the regenerated cellulose fiber to have a unique structure of internal hollow macropores and external nanoscale pores, and improve the thermal insulation performance, air permeability and hygroscopicity of the fiber. The mechanical property is excellent, the preparation method is simple, and the cost is low.

The invention discloses a method for harmlessly treating lithium slag and preparing a water-stable material from the treated lithium slag. The method comprises the following steps: crushing the lithium slag; mixing a sulfuric acid-containing material with the crushed lithium slag to obtain a pulpified mixture; roasting, and carrying out chemical modification to obtain roasted slag; adding a material containing activated aluminum oxide into the roasting slag to obtain a mixed material; the mixed material is subjected to water leaching and filtering, and leaching residues and leaching liquid are obtained; and drying the leaching slag, adding an exciting agent, and grinding to finally obtain the detoxified lithium slag. And preparing the water-stable material from the detoxified lithium slag. Under the condition of effectively improving the quality of the cement-stabilized layer, the lithium slag resource is effectively utilized, the resource utilization rate is improved, and the mechanical strength and corrosion resistance of the cement-stabilized layer concrete can be effectively improved by matching with the exciting agent and the curing agent.

The invention discloses a saline-alkaline tolerant strain as well as a culture method and application thereof, and relates to the technical field of agricultural biology. Comprising the following steps: S1, screening and culturing strains; s11, carrying out salt tolerance detection on primary strains stored in a laboratory, then carrying out first screening, and screening out strains with OD600 values greater than 1.0 as candidate strains; s12, inoculating the candidate strains into a culture medium, carrying out secondary screening, and screening out strains with the OD600 value greater than 1.0 as saline-alkaline tolerant strains; and S13, inoculating the saline-alkaline tolerant strain into the EPS-producing strain fermentation medium. The application of the saline-alkaline tolerant strain provided by the invention can obviously improve the yield and quality of crops; experiments show that after the HB-02 strain is inoculated, the prevention and treatment effect on wheat root rot reaches 80.2%, the yield of wheat in saline-alkali soil is increased to 703.13 g / m < 2 > from 516.61 g / m < 2 >, the yield is increased by 36.10%, and good disease prevention and growth promotion effects are shown.

The invention relates to a flexible electrochemical pH sensor as well as a preparation method and application thereof. Wherein the flexible electrochemical pH sensor comprises a flexible nanofiber substrate as well as a working electrode and a reference electrode which are arranged on the surface of the flexible nanofiber substrate at an interval, the working electrode comprises a first working part and a first wire part connected with the first working part, and the first working part is provided with a polyaniline sensitive layer. The flexible electrochemical pH sensor has the characteristics of high sensitivity, good flexibility and good air and moisture permeability, can be tightly attached to the surface of skin to monitor the pH value of body fluid, and is high in monitoring accuracy and simple in manufacturing method.

The invention discloses a full-biodegradable paper diaper breathable bottom film, and relates to the technical field of paper diaper production, and the full-biodegradable paper diaper breathable bottom film comprises the following components by weight: 45-55 parts of polylactic acid, 35-45 parts of a starch-based polymer, 10-12 parts of plant short fiber, 8-10 parts of bamboo fiber, 2-4 parts of a photosensitizer, 5-10 parts of polyvinyl alcohol, and 1-3 parts of lavender essential oil. According to the present invention, the starch-based polymer can enhance the biodegradability and the flexibility, the bamboo fiber can improve the water absorption and the natural antibacterial property, and can accelerate the degradation; the photosensitizer accelerates the degradation speed of the material under illumination, and the biodegradable material is adopted, so that the pollution to the environment is reduced, and the requirement of sustainable development is met.

The invention relates to the technical field of yarn post-treatment, in particular to foamed yarn and a preparation method thereof. The preparation method comprises the following steps: sizing yarns in a mixed solution of a curing agent and slurry, and then sequentially curing and foaming to obtain foamed yarns, the slurry comprises foaming resin and thermal expansion microspheres. According to the preparation method, slurry is cured and foamed to form a foaming coating formed by the flexible resin and the elastic filler on the yarn. The foaming coating can improve the softness and rebound resilience of the yarn; the foaming coating contains thermal expansion microspheres, so that the bulkiness and the air permeability of the yarn can be improved after expansion; and the curing agent in the foaming coating is crosslinked with the foaming resin, so that the hydrolysis resistance and the scratching resistance of the foaming coating can be improved.

The invention discloses a phase change energy storage waterborne polyurethane nanofiber membrane and a preparation method thereof. Lignin-based phase change microcapsules are prepared by combining ultraviolet crosslinking with lignin shell packaging, and then the nanofiber membrane containing the phase change microcapsules is prepared through an electrostatic spinning technology. And finally, constructing the waterborne polyurethane phase change fiber membrane with asymmetric wettability through a low-temperature plasma technology. According to the invention, lignin is self-assembled to form nanoparticles, and ultraviolet light induces free radical polymerization to form a polymer film, so that the packaging capability of the phase change material is improved. The phase change microcapsule prepared by the method is high in packaging efficiency and excellent in phase change performance, the preparation process is green and environment-friendly, the technological operation is simple, the temperature of the prepared phase change energy storage waterborne polyurethane nanofiber membrane conforms to the comfortable temperature range of a human body, and the phase change energy storage waterborne polyurethane nanofiber membrane has excellent temperature regulation, waterproof and moisture permeable performance and is suitable for being used in the field of water treatment. Good application prospects are realized in the field of functional textiles with functions of intelligent temperature regulation, water resistance and air permeability and the like.

The invention provides a southern red soil dry land deacidification soil conditioner and a preparation method thereof, and belongs to the technical field of soil conditioners. The preparation method comprises the following steps: embedding bacillus subtilis, bacillus licheniformis and bacillus amyloliquefaciens to prepare bacterial microspheres, adding the bacterial microspheres into gel formed by carboxymethyl chitosan and silk fibroin peptide to prepare sustained-release bacterial microsphere gel, uniformly mixing the sustained-release bacterial microsphere gel with porous silicon dioxide loaded with basalt and charcoal, and drying to prepare the acid-reducing soil conditioner for the southern red soil dry land. The acid-reducing soil conditioner for the southern red soil dry land not only improves the pH value of the soil, but also can loosen the soil and improve the air permeability of the soil to a certain extent, and promotes the absorption of crops to moisture and nutrient elements by improving the physical and chemical properties of the soil, so that the normal growth of the crops is ensured, and the acid-reducing soil conditioner has a wide application prospect.

The invention discloses low-drunkenness type Baijiu distiller's yeast and a preparation method and application thereof. The prepared distiller's yeast can be used for producing baijiu, the physical and chemical indexes of the baijiu are good, fusel oil is reduced by 30%-57%, the metabolism speed of yeast is controlled by controlling the saccharification speed, and the generation of the fusel oil is reduced; meanwhile, lactic acid bacteria and bacillus subtilis of the distiller's yeast and bacteria cultured in a high-temperature stage can effectively inhibit the path of fusel oil metabolized by yeast, generation of fusel oil is further reduced, total ester and total acid are slightly increased basically, the content of total dibasic acid is increased by 10 times, and the content of dibasic acid diethyl ester is increased by 2 times. After the wine liquid is aged, drunkenness detection is carried out, and the comprehensive drunkenness Q is 0.6815-0.8325 and is far lower than a variety of commercially available white spirits (the comprehensive drunkenness is greater than or equal to 1).

The invention relates to a breathable device applied to a shoe sole and a preparation method thereof, the shoe sole and a shoe, the breathable device comprises a gasket and waterproof breathable cloth covering the surface of the gasket, a plurality of protrusions are arranged on the surface of the gasket, a plurality of breathable holes are formed in the protrusions, and a plurality of round holes are formed in the periphery of the waterproof breathable cloth. A gasket is arranged on the peripheral edge of the waterproof breathable cloth in an overlapped mode and integrally formed with the gasket through the penetrating round holes. A mold A is adopted for manufacturing a semi-finished inner ring part, then the inner ring part is put into a lower mold of a mold B, TPU materials are injected into the mold B, the TPU materials flow into a groove of the inner ring part and the peripheral edge of a mold cavity of the lower mold of the mold B, and meanwhile the TPU materials penetrate through round holes of waterproof breathable cloth to flow into an annular groove of an upper mold of the mold B; the inner ring part, the waterproof breathable cloth and the secondarily injected TPU material cloth are bonded and integrally formed, the TPU material vertically clamps the peripheral edge of the waterproof breathable cloth, the waterproof breathable cloth and the inner ring part are firmly connected, and the peripheral edge is not prone to delaminating.

The invention relates to the technical field of automatic dust removal equipment, and discloses safe-filtering electrical automatic dust removal equipment which comprises a main body, a partition plate is fixedly connected to the interior of the main body, an adsorption pump is fixedly connected to the top of the partition plate, an outlet bin is fixedly connected to the bottom of the main body, and a rotating ring is arranged at the end, away from the adsorption pump, of the partition plate; the end, close to the adsorption pump, of the connecting disc is in bolted connection with the partition plate. The spiral structure in the arc-shaped vertebral plate can guide gas sprayed out through the hollow ring, so that the gas flows in a downward spiral flowing mode when being sprayed out, and dust on the surface of the filter layer is sprayed downwards to be cleaned; the dust collector has the advantages that stronger impact force and downward traction force can be generated on dust on the surface of the dust collector, so that the dust is more effectively cleaned, the dust is prevented from being accumulated on the surface of the dust collector, and a filtering layer is prevented from being blocked.

The invention discloses a bonding composition for a battery diaphragm, slurry, a diaphragm and a lithium ion battery. The bonding composition for the battery diaphragm comprises polymer microspheres and a modifier, and the modifier is a microsphere surface macromolecule free volume modifier; the polymeric microspheres comprise an affinity monomer. The surface-modified polymer microsphere particle dispersion liquid, namely the bonding composition, which is uniform in particle size is prepared through affinity of the surface polymer free volume modifier by virtue of the affinity monomer in the polymer microsphere, so that the bonding force of a particle coating film and a pole piece in a dry state and a wet state is further improved; the technical problems that in the prior art, strong bonding force cannot be achieved in a dry state and a wet state at the same time, and a rolled and coated film is prone to adhesion and powder falling are solved.

The invention discloses a preparation method of a novel industrial rare earth ammonium sulfate saline-alkali soil conditioner, and relates to the technical field of wastewater treatment.The preparation method specifically comprises the following steps that S1, a KOH solution is added into rare earth smelting ammonium sulfate waste liquid, supernate is taken, and a superior rare earth ammonium sulfate material is obtained; s2, adding a humic acid solution into the superior rare earth ammonium sulfate material to obtain a solution I; s3, adding a mineral source potassium fulvate solution into the solution I to obtain a solution II; s4, adding a wood vinegar solution into the solution II, and uniformly mixing to obtain a solution III; and S5, carrying out freeze drying treatment on the solution III to obtain the novel industrial rare earth ammonium sulfate saline-alkali soil conditioner material. Treated superior rare earth ammonium sulfate is used as a main raw material, humic acid, mineral source potassium fulvate, wood vinegar and other components are added to carry out directional modification treatment on the superior rare earth ammonium sulfate, and the novel saline-alkali soil conditioner material is obtained.

The invention relates to the field of sponge materials, and provides an antibacterial degradable sponge material and a preparation method thereof. The material is prepared from protocatechuic acid modified quaternized chitosan, quaternary ammonium salt grafted gelatin, sodium alginate, polyhydroxybutyrate, polycaprolactone, a polylactic acid-glycolic acid copolymer, hexamethylene diisocyanate, a foaming agent, nano cellulose, vitamin E, polyethylene glycol, triethylamine and dimethylformamide. Protocatechuic acid and quaternized chitosan are subjected to amidation modification, and chitosan and gelatin are subjected to quaternization treatment by adopting 2, 3-epoxypropyl trimethyl ammonium chloride, so that the antibacterial property and biodegradability of the material are improved. In the material preparation process, through vacuum degassing, foaming vacuum degree and humidity control and a multi-step drying process, it is ensured that the average pore size of the material is uniform (50-200 microns) and the porosity is high (50%-90%), and the obtained material has excellent antibacterial property and degradability and has wide application value.

The invention provides a polyvinylidene fluoride-based nanofiber yarn wave-absorbing fabric as well as a preparation method and application thereof, and belongs to the technical field of preparation of wave-absorbing composite materials. The preparation method comprises the following steps: preparing nanofiber yarns or nanofiber core-spun yarns by adopting a conjugate electrostatic spinning technology, directly adding a conductive substance into a spinning solution to form conductive nanofibers, and further coating the nanofiber yarns or the nanofiber core-spun yarns with a PDA shell layer to improve the wear resistance and reduce silver nanoparticles in situ; finally, the yarns are woven into fabric through a weaving or knitting technology, and the fabric is applied to the fields of buildings, electromagnetic protective clothing, flexible electronics and the like. Compared with an existing microwave absorbing material, the fabric-based material is light in weight and good in mechanical flexibility and processability. Fabrics formed of nanofiber yarns or nanofiber core spun yarns facilitate the induction of interfacial polarization and multiple reflections, and can deeply design material properties. The material provided by the invention has better wear resistance, wearability and microwave absorption performance, and is suitable for actual production and application.

The invention relates to the technical field of preparation of antibacterial gloves, in particular to a preparation method of degradable breathable antibacterial gloves, and an emulsion formula of the degradable breathable antibacterial gloves comprises the following components in parts by weight: 100 parts of nitrile rubber modified polylactic acid, 5-10 parts of modified antibacterial filler, 1-3 parts of an anti-aging agent, 0.5-3 parts of a vulcanizing agent, 0.3-2 parts of a vulcanization accelerator and 0.5-1 part of a foaming agent. Through a high-molecular compound composition system, nitrile rubber modified polylactic acid, modified antibacterial filler and other components are compounded to prepare the glove with controllable degradability, lasting antibacterial property and good air permeability; on the basis of covalent binding of silicon dioxide loaded with antibacterial groups and modified chitosan, the synergistic antibacterial effect of the modified antibacterial filler is achieved, and therefore the antibacterial performance of the glove is improved.

The invention relates to a preparation method of paper, in particular to a preparation method of breathable paper applied to a packaging material. Chitosan and oxidized sodium alginate are subjected to a Schiff base reaction, so that a more open and loose coating layer is formed on the fiber surface, gas circulation is facilitated, and the air permeability of the paper is improved to a certain extent. And a covalent bond formed by Schiff base reaction enhances the binding force between chitosan and oxidized sodium alginate, so that the coating layer is more firmly attached to the surface of wood pulp fiber. The enhanced binding force is favorable for improving the mechanical properties such as tensile strength and breakage resistance of the paper, and an imine bond generated by the Schiff base reaction has higher chemical stability and can resist the influence of changes of external environments such as humidity, temperature and the like on the coating layer, so that the long-term stability of the performance of the paper is kept.

The invention discloses a preparation method and application of an anti-ultraviolet breathable fabric, belongs to the technical field of fabric processing, and aims to solve the technical problem that the breathability and the anti-ultraviolet performance of a fabric in the prior art need to be further improved. The method comprises the following steps: soaking a modified fabric in a skin-friendly impregnation liquid, obtaining an impregnated material after padding is completed, and obtaining the breathable fabric by adopting a microwave evaporation process, namely preparing composite particles taking titanium dioxide particles as cores and porous silicon dioxide as shells, modifying active functional group epoxy groups on the surfaces of the composite particles, hybridizing polyurethane chain segments, and drying to obtain the breathable fabric. The silk fibroin is used as a nucleation center to promote self-assembly of the silk fibroin to form a spherical material, and the internal titanium dioxide particles are used as a microwave absorption center and an electrostatic spinning conductive network while undertaking the effect of an ultraviolet light absorber, so that the process efficiency is improved; the breathable fabric is obtained.

The invention relates to the technical field of rotary cultivators, in particular to an agricultural rotary cultivator which comprises a rack body, a pneumatic adjusting arm for adjusting the tilling depth is arranged on the rack body, a cutter shaft transmission mechanism for turning and loosening soil is arranged in the rack body, and a rotary tillage auxiliary mechanism for breaking a soil layer is arranged at the upper end of the rack body. The side face of the rack body is provided with a soil layer leveling mechanism for scraping and crushing soil, the rotary tillage auxiliary mechanism comprises installation supports symmetrically installed on the rack body, a driving circular shaft is movably installed on the installation supports, and a hammering protruding block is fixedly installed in the middle of the driving circular shaft. By arranging the rotary tillage auxiliary mechanism and utilizing mutual cooperation between a hammering convex block and a driving circular shaft, hardened surface soil can be automatically knocked and crushed before a metal blade makes contact with a soil layer, the metal blade can conveniently turn over and grind the soil, the plowing effect can be guaranteed, and the working efficiency is improved. And the wear rate of the metal blade can be delayed to a certain extent.

The invention relates to the technical field of fertilizers, and discloses a fulvic acid fertilizer based on straw microbial fermentation and a preparation method and application thereof.The preparation method comprises the steps that straw is crushed and subjected to low-temperature plasma pretreatment, and pretreated straw is obtained; then, culturing the mixed microbial preparation to prepare a culture solution; then, the pretreated straw, a nutrient solution, a fermentation auxiliary agent and trichoderma are mixed for fermentation, and therefore a fermentation product is generated. The fermentation auxiliary agent is prepared from seaweed meal, bean flour, humus soil and molasses. And finally, carrying out solid-liquid separation on the fermentation product, and drying the separated solid part to finally obtain the fulvic acid fertilizer. Through combination of low-temperature plasma pretreatment and an innovative fermentation auxiliary agent, the preparation process of the fulvic acid fertilizer is optimized, the fertilizer efficiency of the fertilizer and the crop growth effect are improved, and meanwhile, the environment problem of agricultural waste is solved.

The utility model relates to a ploughing machine for wasabi planting, and belongs to the technical field of wasabi planting. The hydraulic rod drives the ploughing assembly to rotate, the angle of the ploughing ploughshare can be flexibly adjusted according to the ploughing depth requirement, operation is easy and convenient, in the walking process of the device, soil is ploughed through the ploughing ploughshare, meanwhile, the wheel shaft rotates and drives the first crushing roller and the second crushing roller to rotate, the ploughed soil blocks are crushed, and the ploughing efficiency is improved. Soil blocks which are not completely broken are harrowed again through the harrowing assembly, so that the ploughing effect of the soil is guaranteed, large soil blocks are avoided, the air permeability and water retention of the soil are further improved, growth and development of roots of wasabi are facilitated, secondary rework is not needed, and the ploughing efficiency is improved; the harrowing assembly can harrow crop stubbles and weeds in a planting field and is matched with the second crushing roller to turn the crop stubbles and the weeds into soil, and therefore the planting quality of wasabi is improved.

The invention discloses an electrostatic spinning preparation method of a multifunctional composite nanofiber membrane, which comprises the following steps: step 1, sequentially adding PVDF (Polyvinylidene Fluoride) and PLA (Polylactic Acid) into a first mixed solvent, and adding TiO2 while stirring to obtain a shell solution; melting n-octadecane to obtain a core layer solution; step 2, adding PVDF into a second mixed solvent to obtain a PVDF electrospinning solution; 3, the shell layer solution and the core layer solution are subjected to coaxial electrostatic spinning to form core-shell fibers, the PVDF electrospinning solution is subjected to single-shaft electrostatic spinning to form PVDF beads, high voltage is provided, and PVDFamp formed by compounding the core-shell fibers and the PVDF beads is formed on the aluminum foil; the invention relates to a PVDF / PLA / TiO2 (at) Oct composite nanofiber membrane. The material has good anti-ultraviolet, waterproof, breathable, self-cleaning and thermal regulation functions, and has excellent mechanical properties and degradability.

The invention discloses a preparation method of a TPMS structural ceramic membrane with high air permeability. The TPMS structural ceramic membrane is prepared by taking the ceramic slurry as a raw material and adopting photocuring 3D printing forming and high-temperature sintering. A digital model of a TPMS structural ceramic membrane is constructed on the basis of a three-period TPMS structure, the ceramic membrane is composed of a TPMS porous structure supporting body and a thickness-controllable separation layer, and the TPMS structural supporting body prepared through 3D printing remarkably reduces the permeation resistance of the ceramic membrane through high porosity and low pore channel tortuosity of the TPMS structural supporting body. The TPMS structural ceramic membrane is formed at a time through photocuring 3D printing and formed through one-time sintering, the preparation period is effectively shortened, and sintering energy consumption is reduced. The prepared TPMS structural ceramic membrane is high in air permeability, uniform and controllable in pore structure and good in stability in a high-temperature environment, and an efficient material is provided for high-temperature gas dust removal.

The invention relates to the technical field of coal rock dynamic disaster prevention and control, in particular to a rock burst, gas outburst and dust composite disaster integrated prevention and control method which mainly comprises the steps that firstly, a plurality of pressure relief holes are drilled in a coal body in a transportation crossheading and an air return crossheading, gas extraction is carried out on the pressure relief holes, then secondary drilling is carried out on the pressure relief holes, and the gas outburst and dust composite disaster integrated prevention and control method is obtained. And deep gas extraction holes and deep coal seam water injection holes are formed, then gas extraction of the deep gas extraction holes and water injection of the deep coal seam water injection holes are conducted at the same time, and finally grouting plugging is conducted. According to the method, preliminary pressure relief is conducted on the coal body, gas accumulation of coal rock mass at the shallow portion of the roadway is reduced, then deep gas extraction and water injection are conducted at the same time, and deep gas extraction and deep coal seam water injection of the coal face can intersect and cooperate with each other in the coal body; the effects of extracting gas from a deep coal seam, wetting and softening the coal body and improving the physical and mechanical properties of the coal and rock mass are more effectively achieved, and pressure relief-extraction-water injection integrated prevention and control are achieved.

The invention discloses a preparation method and application of a dry self-adhesion flexible capacitive pressure sensor, and the method comprises the steps: dissolving a polymer through an organic solvent, and obtaining an electrostatic spinning precursor solution; performing same-pressure conjugate electrostatic spinning through the electrostatic spinning precursor solution to obtain a self-adhesion composite nanofiber membrane; a nanofiber membrane is obtained through electrostatic spinning; the obtained self-adhesion composite nanofiber membrane is used as a packaging layer, and the nanofiber membrane is used for preparing a flexible electrode in a mode of vacuum filtration of a carbon nanotube; and assembling the obtained packaging layer and the flexible electrode according to a capacitive structure, leading out a wire, positioning the assembled structure by using a hollow mask plate, and completing packaging through a hollow hot pressing technology. Through specific polymer selection and an electrostatic spinning technology, the prepared self-adhesion composite nanofiber membrane can be directly adhered to the skin or other complex surfaces, an additional adhesive is not needed, and the comfort level and the use convenience of a user are improved.

The invention relates to the technical field of batteries, in particular to a battery diaphragm, a preparation method thereof and a battery. The battery diaphragm comprises a base material layer and a dotted coating positioned on at least one side surface of the base material layer, the dotted coating comprises a non-fluorine composite material and a binding material; the non-fluorine composite material comprises aggregate of a plurality of unit materials, each unit material comprises a matrix and a coating layer located on the surface of the matrix, the matrix comprises a first polymer, and the coating layer comprises a second polymer; and the ratio eta of the thickness of the coating layer to the particle size of the unit material and the glass transition temperature Y of the second polymer meet the relational expression: Y = 100 eta-46. The battery diaphragm comprises the non-fluorine composite material and the binding material, the non-fluorine composite material is limited by satisfying the relationship, so that the adhesion difference between the diaphragm and an electrode plate at low temperature and high temperature is not large, and the whole performance of a battery cell is not greatly influenced after the battery cell preparation process is changed from hot pressing to cold pressing; and the cycling stability and the safety performance of the battery can be ensured.

The invention relates to the field of automobile roofs, and particularly discloses a low-odor dry ceiling and a manufacturing method thereof. The invention discloses a low-odor dry ceiling and a manufacturing method thereof. The low-odor dry ceiling comprises a non-woven fabric, a first chopped glass fiber layer, a first adsorption bonding layer, a first hot melt adhesive film layer, a polyurethane foam layer, a second chopped glass fiber layer, a second adsorption bonding layer, a second hot melt adhesive film layer and a fabric layer which are sequentially connected, each of the first adsorption bonding layer and the second adsorption bonding layer comprises high-density polyethylene powder and an adsorbent, the addition amount of the adsorbent is 15-25wt% of that of the high-density polyethylene powder, the adsorbent is silicon dioxide aerogel modified composite activated carbon, and the composite activated carbon comprises microporous activated carbon and mesoporous activated carbon in a mass ratio of (2.56-3.12): (1.12-2.05); in addition, the preparation method disclosed by the invention has the advantage of reducing odor and VOC (Volatile Organic Compounds) in the production and use processes of the automobile roof.