131 results about "Acid resistance" patented technology

The application discloses a kind of corrosion-resistant aluminum alloy profiles and preparation method thereof, belong to aluminum alloy profile technical field.The application can ensure the strength of aluminum alloy profile by optimizing the composition of corrosion-resistant aluminum alloy, and has a positive effect on the corrosion resistance of aluminum alloy profile.In addition, the application forms a corrosion-resistant coating on the surface of the corrosion-resistant aluminum alloy substrate by laser cladding, which can significantly improve the corrosion resistance of the aluminum alloy profile while ensuring the application performance of the aluminum alloy profile.In the corrosion-resistant coating, nickel powder can enhance the resistance to pitting and intergranular corrosion, and improve the adhesion to the aluminum alloy substrate.Boron nitride can improve the surface acid resistance and wear resistance of the aluminum alloy profile, and block the corrosion channel.Lanthanum oxide and cerium dioxide have a synergistic effect, which can refine the surface grains, reduce the pores generated during the cladding process, improve the compactness of the coating, promote the compatibility with the aluminum alloy substrate, and ensure the appearance quality of the aluminum alloy profile.

The invention provides an LTCC raw material belt with a high thermal expansion coefficient, an LTCC substrate and a preparation method of the LTCC substrate, the LTCC raw material belt with a smooth surface and a uniform thickness is obtained through tape casting by adjusting the proportion of silicon dioxide ceramic powder, MgTiO3 ceramic, SrTiO3 ceramic, Li2MgSiO4 ceramic, BCBS, ZABS and LASP microcrystalline glass powder, the LTCC raw material belt is sintered in a nitrogen furnace at 880-940 DEG C for 1-3 h, and the LTCC raw material belt can be co-fired with low-cost copper electrode slurry to be flat and tightly attached to the low-cost copper electrode slurry. The LTCC substrate with the thermal expansion coefficient larger than 11 ppm / DEG C is prepared, under the test frequency of 5 GHz, the dielectric constant of the LTCC substrate ranges from 5.1 to 6.1, the dielectric loss ranges from 0.0025 to 0.004, the bending strength ranges from 170 MPa to 230 MPa, the thermal expansion coefficient at the temperature ranging from 30 DEG C to 400 DEG C ranges from 11.0 ppm / DEG C to 13.0 ppm / DEG C, and acid resistance is good.

The invention discloses foam concrete based on acidic iron tailing sand. The foam concrete comprises the following components in parts by weight: 200-500 parts of cement, 100-400 parts of acidic iron tailing sand, 50-150 parts of superfine slag powder, 15-25 parts of a composite acid-resistant foaming agent solution, 1-10 parts of composite fibers and 200-300 parts of water, the composite acid-resistant foaming agent solution is prepared by mixing a composite acid-resistant foaming agent and water, and the composite fiber comprises a combination of organic reinforced fiber and inorganic modified fiber. According to the preparation method, the long-term stability and the acid resistance of the foam concrete can be remarkably improved, and meanwhile, the overall performance of the foam concrete is remarkably improved by utilizing the acid resistance and the high temperature resistance of the polymer coated aluminum silicate fibers.

The invention discloses a long-acting stable filling agent for phosphorite mining and a preparation method and application thereof, the long-acting stable filling agent takes cement, slag powder, phosphogypsum and fly ash as matrix components, and is supplemented with additives such as a nano modified liquid, a retarder and an early strength agent. The 3d compressive strength reaches 4.6-5.5 MPa, the 28d compressive strength reaches 13.5-15.5 MPa, the 90d strength retention rate in a simulated acid environment is larger than or equal to 84%, the volume shrinkage rate is smaller than or equal to 0.5%, and the early strength and the excellent long-term acid-resistant stability are both high. Through a synergistic effect of a nano-micron composite structure, pores are filled with nano particles and secondary hydration is promoted, basalt fibers are bridged to resist cracking, and nano montmorillonite blocks acid etching, so that unification of high early strength and long-acting acid resistance is realized. The material is simple and convenient in preparation process, can be efficiently used for mining and filling of phosphorite mountains, and meets the requirements of rapid support and long-term acid medium erosion resistance.

The invention provides an organic silicon spraying powder processing technology, and belongs to the technical field of organic silicon spraying powder manufacturing, and the organic silicon spraying powder processing technology comprises the following steps: S1, mixing organic silicon resin, pigments and fillers, a necessary leveling agent, a defoaming agent and other assistants according to a certain proportion, and heating to make the mixture reach the use performance index; s2, the glossiness of the powder is not lower than 90 degrees, and after the powder is soaked in a sulfuric acid diluted solution for 750 hours, the powder is still not adhered to a filter bag after being re-dried for 5 hours at 220 DEG C; the organic silicon spraying powder obtained through processing has excellent acid resistance and alkali resistance, after being soaked in a sulfuric acid diluted solution with the pH value being 2 and a sodium hydroxide diluted solution with the pH value being 12 for 750 hours, the organic silicon spraying powder does not stick to a filter bag even after being re-dried for 5 hours at the high temperature of 280 DEG C, a coating formed by the powder can be kept stable for a long time in an extreme corrosive environment, and the service life of the coating is prolonged. Corrosion of the equipment surface is effectively prevented, so that the service life of the equipment is prolonged.

Provided is a high strength steel plate for a sour-resistant line pipe with excellent low-temperature toughness as well as HIC and SSCC resistance. The high strength steel plate for a sour-resistant line pipe has a chemical composition containing, by mass%, C: 0.030-0.060%, Si: 0.01-0.50%, Mn: 0.80-1.80%, P: 0.015% or less, S: 0.0015% or less, Al: 0.010-0.080%, Cr: 0.05-0.50%, Nb: 0.005-0.080%, N: 0.0010-0.0080%, and Ca: 0.0005-0.0050%, with the balance being Fe and inevitable impurities, in which a microstructure at 0.25 mm below a surface of the steel plate consists of granular bainite and tempered martensite austenite constituent, a maximum grain size is 80 µm or less and an average grain size is 20 µm or less at a mid-thickness position of the steel plate, a brittle-ductility transition temperature in a Charpy impact test is -100 °C or lower, and a tensile strength is 535 MPa or more.

The invention discloses an anti-corrosion composite coating for an ammonia gas engine, relates to an anti-corrosion technology for an ammonia gas fusion engine, and solves the technical problem that the reliability, durability and commercialization process of an ammonia fuel engine are restricted by the existing engine material system and protection technology. The composite coating comprises a base material arranged on the surface of the ammonia gas engine component; the base material layer is adjacent to the base material layer, is arranged on the surface of the base material and is used for resisting ammonia-alkali corrosion; the middle transition layer is arranged on the surface of the adjacent base material layer and is used for component gradient transition and stress relief; and the outermost surface layer is arranged on the surface of the middle transition layer and is used for resisting acid corrosion and pitting corrosion. The invention further discloses an intelligent corrosion prevention system and method for the ammonia gas engine. The invention solves the problem of limited protection performance of the traditional single coating.

The invention belongs to the technical field of packaging materials, and particularly relates to an aluminum foil cover film with high stripping force and high acid resistance and a production process of the aluminum foil cover film. The aluminum foil cover film is formed by sequentially compounding a PET layer, an aluminum foil layer and a film blowing PE layer in a dry mode, the film blowing PE layer is composed of a layer A, a layer B and a layer C which are sequentially connected, and the aluminum foil layer is connected with the layer A through an adhesive; the layer A consists of first linear low-density polyethylene and second linear low-density polyethylene; the layer B is prepared from first linear low-density polyethylene, second linear low-density polyethylene and high-density polyethylene; and the layer C consists of first linear low-density polyethylene, third linear low-density polyethylene and an anti-blocking agent. The aluminum foil cover film prepared by the invention has relatively high stripping force, can effectively prevent layering and bag breaking when being used in a high-temperature and high-humidity environment, and has excellent acid resistance.

This application relates to a process for preparing a filled wax-free adsorption pad, which is obtained by the following method: Step 1) PE foam material is foamed to form a porous structure of several foam skins; a modified PE board has several slots; Step 2) Adhesive is applied to the surface of the foam skins, and then the adhesive side of the foam skins is attached to the slots of the modified PE board, with the foam skins and slots corresponding one-to-one, and fixed to obtain a filled wax-free adsorption pad; both the PE foam material and the modified PE board contain an acid-resistant blend modifier; the acid-resistant blend modifier is composed of nano-lithium-based inorganic bentonite, polystyrene-poly(heptaisobutyl cage-type polysilsesquioxane alkylpropyl-methacrylate), maleic anhydride graft, and aromatic polyamide hyperbranched polymer. The filled wax-free adsorption pad obtained by the above technical solution ensures basic performance, further improves acid resistance, reduces wear, breakage, swelling, etc., and improves service life.

The invention relates to acid-resistant glass powder suitable for N-type battery front fine grid LECO slurry as well as a preparation method and application of the acid-resistant glass powder. The glass powder disclosed by the invention contains more silicon dioxide and titanium dioxide, so that the acetic acid resistance of the glass powder is greatly improved; due to the net-shaped structure of SiO2, the coating has excellent chemical stability and can effectively resist erosion of acetic acid; tiO2 is used as a network intermediate, so that the acetic acid corrosion resistance of the glass powder is further enhanced; through experimental tests, in the same acetic acid environment, the acetic acid attenuation rate of the conductive silver paste prepared from the glass powder is reduced by 30-50% compared with that of the traditional silver paste; when the glass powder is applied to the front fine grid LECO slurry, the corrosion of acetic acid steam can be resisted on the premise of ensuring the electrical performance, and the acetic acid attenuation rate of a battery piece is greatly reduced, so that the reliability of a photovoltaic module is improved, and the service life of the photovoltaic module is prolonged.

An embodiment of the present invention relates to an organic solvent-releasable curable resin composition which comprises a (meth)acrylate-based monofunctional monomer and a photopolymerization initiator, does not comprise a polymer having a weight average molecular weight of 5000 or more, and does not have an acid value. The organic solvent-releasable curable resin composition according to the present invention can be easily cured even with a single-wavelength LED lamp installed in an inkjet printer, and can have acid resistance and alkali resistance.

The invention discloses a preparation method and application of a Ni-NH2-MOF-coated HPP-COF composite material for adsorbing and separating perfluorocarbon gas / nitrogen, and belongs to the field of gas separation. The method comprises the following steps: 1, preparing HPP-COF powder; 2, preparing Ni-NH2-MOF (Metal Organic Framework) powder; and 3, compounding. According to the invention, Ni-NH2-MOF and HPP-COF are introduced into the field of gas adsorption, and a method for combining COF and MOF materials is creatively provided by utilizing the interaction of specific recognition of a perfluorinated compound and an amino group and a polymerization reinforcing structure on the surface of HPP-COF; a PFCs / N2 mixed gas separator meeting actual production requirements is prepared, the high adsorption capacity of MOF and the high stability of COF are combined, the problems that a traditional static porous material is poor in selectivity, stability and acid resistance are solved, specific adsorption of MOF to PFCs is enhanced, and selectivity is improved.

The application provides a kind of grooving ultra-thin glass and its processing method, the ultra-thin glass includes thinning area and non-thinning area, the thinning area includes folding area, and transition area symmetrically arranged at both ends of the folding area, the transition area and the folding area are smoothly connected, both ends of the transition area are smoothly connected non-thinning area;The processing method includes attaching acid-resistant film on one side surface of ultra-thin glass to obtain glass sample, freezing both ends of the glass sample respectively, and then completing the grooving of ultra-thin glass through etching process and cleaning process.In the application, the processing method of ultra-thin glass grooving is provided, which is cooperated by freezing, etching process and cleaning process, and the specific steps of each operation are controlled, which greatly increases the impact resistance of ultra-thin glass, and the transition area of ultra-thin glass after grooving is very smooth, the overall operation is simple, the cost is low, the grooving effect is good, and it is suitable for popularization and use.

This invention provides a highly thermally stable enteric-coated DHA microcapsule powder, its preparation method, and its applications. The microcapsule powder utilizes a composite wall material system with a specific ratio of raw materials: carbohydrate film-forming materials, protein film-forming materials, hydrophilic colloids, and dietary fiber materials. The resulting dense wall material not only maintains a supportive interface and film-forming structure under hot water reconstitution conditions, exhibiting high-temperature reconstitution stability, but also features an acid-resistant design, ensuring resistance to acid in aqueous solutions and reducing the nausea / gastric reflux after oral administration of the microcapsule powder. This achieves a balance between high-temperature and acid resistance, overcoming the problems of dispersion and nausea / gastric reflux associated with traditional DHA microcapsules. Furthermore, the microcapsules of this invention, through a synergistic system of "lipid-soluble antioxidants + aqueous antioxidants / reducing agents," reduce accelerated oxidation and off-flavor release during high-temperature reconstitution, thereby improving flavor acceptability.

The invention belongs to the technical field of microbial fermentation, and particularly relates to rhodotorula mucilaginosa JQRM001 and application thereof. The invention provides a rhodotorula mucilaginosa JQRM001, the Latin name of the rhodotorula mucilaginosa JQRM001 is Rhodotorula mucilaginosa, the rhodotorula mucilaginosa JQRM001 is preserved in China General Microbiological Culture Collection Center, the address is No.3, Yard 1, Beichen West Road, Chaoyang District, Beijing, the preservation date is July 15, 2025, and the preservation number is CGMCC No.35240. The invention further provides a preparation method of the rhodotorula mucilaginosa. The rhodotorula mucilaginosa JQRM001 not only has excellent performance of high temperature resistance and acid resistance, but also can be used for specifically synthesizing alkylpyrazine flavor substances and remarkably improving the antioxidant activity of plant polysaccharides.

The application discloses a leakage-proof long-service-life energy storage battery cooling concentrate as well as a preparation method and application thereof. The leakage-proof long-service-life energy storage battery cooling concentrate comprises the following components: ethylene glycol, a surface tension improver, a buffer, a benzotriazole compound and an organic acid. The cooling concentrate has excellent heat conduction performance, metal corrosion resistance, acid resistance, leakage prevention performance and super-long service life, and the cooling concentrate also has good environmental protection performance. By using the cooling concentrate, the performance and service life of the energy storage battery can be effectively improved, the operation and maintenance cost is reduced, and a powerful guarantee is provided for the safe and stable operation of a power system.

The application relates to a high-flux positively charged acid-resistant nanofiltration membrane, a preparation method and application thereof. The preparation method comprises the following steps: immersing an ultrafiltration base membrane into a prepared aqueous phase solution to react, drying to obtain an ultrafiltration base membrane I; immersing the ultrafiltration base membrane I into an oil phase solution to react, obtaining an ultrafiltration base membrane II; and heat treating the ultrafiltration base membrane II to obtain the high-flux positively charged acid-resistant nanofiltration membrane. The nanofiltration membrane prepared by the application has the advantages of 100%-250% flux increase under the premise of ensuring acid resistance and salt retention rate, the preparation method is simple and easy to realize industrial production, and has wide application prospects; the high-flux positively charged acid-resistant nanofiltration membrane prepared by the application improves the retention rate of multivalent cations and the acid permeation rate.

This application relates to the technical field of adhesive tapes, specifically disclosing a UV-resistant, acid-resistant tape for flexible glass thinning and its preparation process. A UV-resistant, acid-resistant tape for flexible glass thinning comprises a substrate layer, a pressure-sensitive adhesive layer, and a release film layer stacked sequentially. The pressure-sensitive adhesive layer is prepared from the following raw materials: 85-120 parts by weight of an acrylate copolymer, 3-5 parts by weight of a crosslinking agent, 1.5-2.5 parts by weight of a photoinitiator, 2-5 parts by weight of an acid-resistant nanofiller, and 0.2-0.4 parts by weight of an amine catalyst. The acrylate copolymer is prepared from the following raw materials: 20-30 parts by weight of an imidazoline monomer, 15-25 parts by weight of a sterically hindered alkyl monomer, 45-55 parts by weight of a flexible monomer, and 5-10 parts by weight of a carboxyl monomer. The UV-resistant, acid-resistant tape obtained in this application exhibits good acid resistance and a reliable balance between UV tack reduction and high initial adhesion.

The application discloses a kind of glass powder for electroplated silver paste, and chemical composition includes: SiO2 30~40%, TiO2 10~20%, B2O3 10~20%, SrO 5~10%, MgO 5~10%, ZnO 5~10%, BaO 1~10%, Na2O2~8%, Al2O3 1~5% by mass percentage.The silver paste glass powder has a suitable softening temperature, strong crystallization ability, excellent acid resistance, and has a matching thermal expansion coefficient and chemical compatibility with the ceramic substrate;The silver electrode made of the glass powder can complete the electroplating process well, and can achieve excellent adhesion strength between the silver electrode and the ceramic substrate, and is suitable for popularization and application.

This application relates to the field of lithium aluminum silicate glass technology, and provides a high Young's modulus lithium aluminum silicate substrate glass and its chemically strengthened glass. The substrate glass, based on the molar percentage of oxides, comprises the following components: SiO2 60.0-70.0 mol%; Al2O3 8.0-15.0 mol%; MgO 1.0-8.0 mol%; Li2O 7.0-12.0 mol%; Na2O 2.0-5.0 mol%; and Y2O3 and La2O3; wherein Y2O3+La2O3 is 4.0-8.0 mol%. The chemically strengthened glass is obtained by chemically strengthening the substrate glass. The substrate glass and chemically strengthened glass of this application have reasonable component contents, achieving a good combined effect. The combination of components results in a glass with high Young's modulus and high stress performance, good acid resistance, and excellent mass production performance, meeting the development needs of cover glass in high-end mobile phone products.

This invention discloses an acid-resistant sealing grouting material suitable for the treatment of acidic mine water inrush, its preparation method, and its application. It belongs to the technical field of mine groundwater pollution prevention and control and mine water hazard management. The acid-resistant sealing grouting material, by weight, comprises: 8-12 parts nano-hydroxyapatite, 1.5-3 parts sodium alginate, 5-8 parts porous adsorbent material, 100 parts cement, 25-35 parts water glass, 3-5 parts quicklime, 0.5-1.0 parts retarder, and 50-65 parts water. The acid-resistant sealing grouting material of this invention can immobilize iron and manganese, exhibits strong acid resistance and good pressure resistance, and is suitable for grouting materials used in sealing goaf areas and fissures in closed mines.

The application relates to the technical field of ammonium oxidation, and discloses an anode material for ammonium oxidation under a low-concentration chloride ion condition and a preparation method thereof.The anode material takes manganese dioxide as a carrier and is loaded with monatomic silver, and the loading amount of the monatomic silver is less than 0.1 wt%.In the preparation process, first, constant current density electrodeposition is carried out to prepare a MnO2 / platinum-coated titanium mesh; then, a wet chemical immersion method is used to load Ag on the MnO2 substrate; finally, high-temperature air atmosphere calcination is carried out to prepare a monatomic Ag / MnO2 anode material.The application utilizes the acid resistance of MnO2 itself and the strong metal carrier interaction between metal Ag and MnO2 to realize stable and continuous electrolysis operation; and Ag and MnO2 realize the enrichment of low-concentration chloride ions at the anode interface through chemical affinity and physical adsorption, thereby realizing the efficient generation of active chlorine under the condition of low-concentration chloride ions.

The invention relates to the technical field of building composite materials, in particular to a weather-resistant reinforced plastic steel tile and a preparation method thereof. The weather-resistant reinforced plastic steel tile provided by the invention is prepared from the following raw material components: a polyvinyl chloride resin matrix, a glass fiber reinforced material, filler, nano silicon dioxide, adsorption type calcium carbonate, a titanium-carbon hybrid weather-resistant agent and a synergist. Acid etching ions are selectively captured through a zeolite molecular sieve of adsorption type calcium carbonate to improve the acid resistance of the plastic steel tile, an ultraviolet shielding net is constructed in cooperation with a titanium-carbon hybrid weather-resistant agent, meanwhile, chlorine free radicals and active oxygen can be captured through a synergist, and embrittlement caused by oxidation and ash formation of carbon black is prevented. And the service life of the plastic steel tile is prolonged under the conditions of acid rain, ultraviolet and cold and hot cycles.

The application relates to the coating technical field and discloses a composite coating as well as a preparation method and application of the composite coating. The composite coating comprises an inner layer, an outer layer and a bonding layer arranged between the inner layer and the outer layer; the outer layer is a basalt fiber cloth; and the preparation raw materials of the inner layer comprise 100 parts by weight of a first epoxy resin, 10-40 parts by weight of chopped basalt fibers, 5-30 parts by weight of hexagonal boron nitride, 0.5-5 parts by weight of a coupling agent, 1-3 parts by weight of a surfactant, 0.5-2.5 parts by weight of an antioxidant and 1-15 parts by weight of a curing agent. The composite coating provided in the application can significantly enhance the bonding strength between the composite coating and a base body through the interaction between the various components, can avoid the falling-off of the composite coating, can significantly improve the acid resistance and halogen water corrosion resistance of the composite coating, and is suitable for industrial popularization.

The invention relates to the technical field of anti-corrosion coatings, in particular to an anti-corrosion early warning coating, a preparation method and application of the anti-corrosion early warning coating to environment monitoring equipment. The corrosion-resistant early-warning coating comprises an inner-layer coating and an outer-layer coating, wherein the outer-layer coating is prepared from the following components: a water-based fluorocarbon emulsion, a reinforcing agent, a polyether siloxane flatting agent and water; the inner-layer coating is prepared from the following components: waterborne epoxy emulsion, fluorescent particles, a waterborne amine curing agent, a polyether siloxane flatting agent and water. According to the double-layer structure coating prepared through the technical scheme, through the synergistic effect of the innovative reinforcing agent and the fluorescent particles, the excellent acid resistance is achieved, and the adhesive force can reach 26.5 MPa to the maximum; meanwhile, whether the surface protection state of the environment monitoring equipment is intact or not can be studied and judged immediately.

The application discloses a forming process of acid-resistant ceramic products, and aims to solve the problem of poor acid resistance of ceramics caused by microstructure defects and grain boundary impurities in the prior art. The steps of the process comprise the following: firstly, the surface of main raw material particles containing alumina and silicon dioxide is chemically modified, and a nanoscale metal oxide coating layer with high chemical inertness is generated in situ on the surface of the particles. Then, the modified powder is prepared into a high-uniform-density ceramic green body by using a gradient pulse pressure forming method, so as to eliminate internal defects. In the sintering step, a controllable atmosphere multi-stage treatment is adopted: firstly, high-temperature purification is carried out in a weak reducing atmosphere, so that the inherent alkali metal oxide impurities in the raw material are removed in the form of gas phase; and then, the inert atmosphere is switched to complete the final densification sintering. The acid-resistant ceramic product prepared by the process has the characteristics of high density and enhanced acid corrosion resistance.

The invention discloses a high-acid-resistance reaction kettle which comprises a kettle body, a stirring mechanism and a feeding pipe, a kettle shell comprises a base body layer, the base body layer is covered with a PTFE plate layer, Q235B carbon steel serves as the base body layer of the kettle shell of the reaction kettle, enough strength is provided, the base body layer is covered with the PTFE plate layer through a modified epoxy resin hole adhesive, and therefore the high-acid-resistance reaction kettle is formed. Compared with the prior art, the acid resistance can be improved through the PTFE plate layer, compared with a PTFE coating layer formed by direct spraying, the problem that the coating falls off or cracks due to thermal expansion can be avoided, and the service life is prolonged.

This invention pertains to coating compositions based on polyesters containing 2,2,4,4-tetrametbyM,3-cyclobutanediol (TMCD) and modifying polyester polyols. Coatings based on such polyester blends are capable of providing a good balance of the desirable coating properties, such as solvent resistance, acid resistance, retort resistance, crazing resistance, and bending ability, for metal packaging applications.

The present application provides a light cationic polymer fatliquor, the polymerized monomers of which comprise: unsaturated polyether, cationic monomer, single-end methacryloyloxypropyl polysiloxane and dodecyl acrylate. The light cationic polymer fatliquor prepared by the present application can be used in the chrome tanning process. In addition to the acid resistance, chrome salt resistance and good color fixing effect possessed by the cationic fatliquor, the light cationic polymer fatliquor also has excellent collagen fiber dispersing effect, can greatly reduce the use of subsequent oil fatliquor, effectively reduces the cost of leather making, and at the same time, gives the leather soft and light touch, and is very suitable for the production of light weight leather products.

The invention provides a mixed glass fiber storage battery diaphragm and a diaphragm manufacturing method and system, and belongs to the technical field of storage battery diaphragm manufacturing, and the mixed glass fiber storage battery diaphragm is mainly composed of bionic multistage superfine glass fibers, core-shell structure hydrophobic fibers, a composite nano filler and an auxiliary agent. According to the mixed glass fiber diaphragm, the core-shell structure hydrophobic fibers are adopted, so that the problem that the existing hydrophobic fibers are insufficient in aging resistance and corrosion resistance is solved, the long-term acid-resistant mechanical strength of the diaphragm is improved, and the cycle life of a storage battery is prolonged; by adding the composite nano filler, the defect of non-uniform dispersion of the nano filler is improved, the dry / wet puncture resistance and tensile strength of the diaphragm are enhanced, and the high-temperature pore diameter stability is improved; the porosity is optimized through bionic multi-stage superfine glass fibers, and the liquid absorption amount and the oxygen diffusion efficiency are improved; and by combining supercritical pulping, vacuum-hot press molding and other processes, the performance consistency of the diaphragm is ensured, so that the comprehensive performance of the diaphragm is remarkably improved, the diaphragm adapts to harsh working conditions of a storage battery, and the operation reliability of the battery is improved.