126results about How to "Improve electrostatic adsorption capacity" patented technology

The invention discloses melt-blown polypropylene as well as a preparation method and application thereof. The melt-blown polypropylene comprises following raw polypropylene resin, a degradation agent,an antioxidant and a lubricant, wherein the degradation agent is selected from one or more of hydrogen peroxide, sodium percarbonate, ammonium percarbonate and urea peroxide. The melt-blown polypropylene also comprises a nucleating agent selected from one or more of dibenzylidene sorbitol, aryl phosphate and nano scale amorphous silicon dioxide, wherein the degradation agent and the nucleating agent respectively account for 0.05-0.5% of the mass percentage of the raw materials. The preparation method comprises the following steps: premixing raw materials, stirring, then selectively adding a deodorant; and melting and granulating by an extruder to obtain the product. The invention also discloses an application of the melt-blown polypropylene in manufacturing melt-blown non-woven fabrics, melt-blown filter elements and sound-absorbing cotton. The melt-blown polypropylene has the advantages of low odor, high electret charge stability and the like.

The invention discloses a nutrient regulation and control agent for reducing the lead and cadmium content of leaf vegetables, which comprises the following substances in percentage by weight: 18%-24% of sodium silicate, 16%-20% of calcium carbonate, 9%-12% of magnesium sulfate, 22%-30% of urea, 9%-11% of diammonium phosphate and 16%-21% of potassium sulfate. The using method of the nutrient regulation and control agent comprises the following steps: before planting the vegetable, uniformly mixing the sodium silicate, calcium carbonate, magnesium sulfate, urea, diammonium phosphate and potassium sulfate to obtain a mixture; base-applying all of the mixture, 20-60 kg per mu; turning over and harrowing uniformly so that the regulation and control agent and the polluted soil are uniformly mixed and seeding or transplanting can be performed; or base-applying half of the mixture, and uniformly dispersing the other half of the mixture into the soil after final singling of seedlings; and loosening the soil and sprinkling water. The regulation and control agent of the embodiment of the invention reduces the bioactivity of heavy metals in the soil, reduces absorption of the heavy metals of the leaf vegetable and improves the soil fertility.

The invention discloses an electret non-woven filter material for air filtering.An evenly-distributed three-dimensional spatial network structure is formed by 0.06D PET superfine fibers and 30D PE/PET skin core complex fibers, linkage joints are formed by the skin core complex fibers and the fibers in contact with the skin core complex fibers, and PTFE coatings are arranged on the surfaces of the superfine fibers and the skin core complex fibers.A preparation method of the electret non-woven filter material comprises the steps that the PET/PET figured sea-island staple fibers and the PE/PET skin core complex short fibers are mixed according to a certain mass ratio and carded, and the electret non-woven filter material is formed through needling net forming, alkali liquor melting, roll compacting and washing, PTFE emulsion dipping, tentering heat shaping and cooling curing.The electret non-woven filter material has the advantages of being high in strength, stable in size and small in resistance.The filter material is high in porosity, small and even in aperture and good in breathability.The electron work function is high, the dielectric constant is small, and the static adsorption effect on PM2.5 dust is good.Super-hydrophobic performance is achieved, and the static adsorption function of the filter material cannot be weakened by damp air.

The invention relates to a preparation method of an electret polylactic acid meltblown nonwoven material, and belongs to the technical field of textile materials. According to the method, an inorganicelectret material nano silicon nitride and a polymer polytetrafluoroethylene are compounded to serve as a filler by means of a mechanical dispersion method, the charge storage capacity of the compound material can be effectively improved under a high-temperature or humid environment, the occurrence of an electret agglomeration phenomenon is avoided, and the service life of the product is prolonged; the compound filler and polylactic acid are meltblown and then subjected to treatment such as opening, impurity removal, combing, lapping, pre-needling, spunlacing and hot rolling, and the nonwovenmaterial is prepared. The method has the advantages that the inorganic electret material nano silicon nitride and the polymer polytetrafluoroethylene are compounded to serve as the filler by means ofthe mechanical dispersion method, and the charge storage capacity of the compound material can be effectively improved under the high-temperature or humid environment; the electret filler and the polylactic acid are compounded, so that the electrostatic potential of the surface of the polylactic acid nonwoven material is increased, and the charge storage capacity is improved.

The invention provides a parallel static-electric air filtering plate which is composed of more than two parallel dust collection plates, herein each dust collection plate is composed of a metal plate and an insulating electret material coating the metal plate. The polarity of power supplies connected to two adjacent dust collection plates are arranged oppositely. The dust collection plate is in a rectangular sheet-like shape, wherein an air filtering channel is formed among the dust collection plates. More than two protruded support points being equal in height are formed between two adjacent dust collection plates, wherein the distance between the two adjacent dust collection plates is less than or equal to the height of the protruded support points. The parallel static-electric air filtering plate is composed of a plurality of dust collection plates, wherein a self-supporting body is formed among the dust collection plates and even integrated moulding is available. The air filtering plate is convenient to install, detach and clean. By means of the electret material for insulating or coating the metal plates, the air filtering plate is free of high-voltage discharging and generation of large quantity of ozone under continuous high-voltage discharging. The air filtering plate also has a dampness-proof function and is improved in safety.

The invention belongs to the field of organic electret materials, and particularly relates to a fluorine-containing organic electret agent, a preparation method thereof and application of the fluorine-containing organic electret agent in electret master batch. The fluorine-containing organic electret agent is core-shell structure particles formed by particle core parts and particle shell parts, the average particle size of the core-shell structure particles is 10-100 [mu]m, the particle core parts are electret silica particles, and the particle shell parts are fluorine-silicon modified resin.The organic fluorine-containing electret agent disclosed by the invention has the technical advantages that the organic fluorine-containing electret agent has good compatibility with polypropylene, and the excellent filtering performance of a polypropylene melt-blown electret material can be well maintained. The electret master batch has high electrostatic capacity, under the action of an externalelectric field, space charge injection and polarization charge generation can be achieved, the PP electrostatic adsorption capacity can be improved, the electret stability of the melt-blown electretmaterial can be improved, charge storage can be effectively prolonged, and the electret master batch is suitable for producing melt-blown cloth with the filtering efficiency of 95 or 99.

The invention discloses an ultra-thin type biaxially-oriented polyester film for a capacitor. The polyester film slice contains nano-level spherical SiO2 with the added amount being 4000-4500PPM and a metal acetate with the added amount being 250-280PPM, wherein the average particle size of the nano-level spherical SiO2 is 1mum, and the metal acetate is magnesium acetate. The invention also provides a production method of the ultra-thin type biaxially-oriented polyester film for the capacitor, which comprises a step for preparing polyester slices and a step for preparing the biaxially-oriented polyester film. The polyester film has the performances such as uniform thickness, excellent dielectric performance and excellent heat stability, and can be used as a base material of the capacitor.

The invention relates to the field of air purification, and discloses air filtering non-woven fabric for an air inlet filter screen of an air conditioner, and a preparation method of the air filtering non-woven fabric. The air filtering non-woven fabric for the air inlet filter screen of the air conditioner is formed by alternately compounding electrostatic absorption layers and antibacterial layers; a single layer of the air filtering non-woven fabric for the air inlet filter screen of the air conditioner comprises two layers or four layers; the electrostatic absorption layers are air inlet faces; the electrostatic absorption layers are respectively made from polyethylene non-woven fabric containing a nano electret; the antibacterial layers are respectively made from polyethylene non-woven fabric compounded with antibacterial substances. The air filtering non-woven fabric provided by the invention not only is high in loading capacity of an electrostatic absorbent and high in fastness, good in electrostatic absorption effect for particulate matters (PMs) such as PM2.5, pollen, dust, smoke and dust mite, good in air permeability and low in wind resistance, but also has an antibacterial function.

The invention relates to negative ion electrostatic dust removal paper base paper and a preparation method thereof. The physical indexes of the negative ion electrostatic dust removal paper base paperare as follows: the quantification is 40-80 g/m<2>, and the tensile strength is 4 KN/m-8 KN/m; the wet strength is 10%-20%; the release amount of negative oxygen ions is 1000/cm<3>-3000/cm<3>; and after 72 hours, the surface potential of an electret is 500 V-1000 V. Plant fibers are used as main raw materials for the first time, negative ion fibers and electret organic fibers are added, and the negative ion electrostatic precipitation paper base paper which has the functions of releasing negative ions, inhibiting bacteria, removing bacteria and conducting electrostatic adsorption and has theadvantages of being rich in raw materials, simple in process, low in cost, large in yield, environmentally friendly and degradable is prepared through the paper making technology.

The invention relates to a nano SiO2 modified PTFE needle blend filter material and a preparation thereof and application thereof. The nano SiO2 modified PTFE needle blend filter material is obtainedby opening, mixing, combing, lapping, pre-needling and main-needling nano SiO2 modified PTFE short fibers and fibers A. The preparation method comprises the steps of preparing the nano SiO2 modified PTFE short fibers and preparing the nano SiO2 modified PTFE needle blend filter material. The nano SiO2 modified PTFE needle blend filter material possesses excellent friction electrification auxiliaryperformance so that fine particulate matters can be effectively captured; and the nano SiO2 modified PTFE needle blend filter material has the advantages of high efficiency, low resistance, stable physical and chemical property, long service life and the like.

The invention discloses a novel melt-blown non-woven fabric as well as a manufacturing method and production equipment thereof. The novel melt-blown non-woven fabric comprises the following raw materials in%age by mass: 94-99% of resin particles and 1-6% of modified functional particles, wherein the modified functional particles are prepared from the following components in%age by mass: 100 partsof functional particles, 1-4% of dispersing agent and 1-6% of coupling agent; fully drying and mixing the modified functional particles and the resin particles, melting, filtering, shunting and extruding, stretching and spraying under high-speed air flow, adhering to the surface of a receiving device in the presence of negative pressure, and then cooling and forming; the novel melt-blown non-wovenfabric is high in breaking strength and good in sterilization effect, and the manufacturing method has the advantages of being simple in process, good in melt flow rate, uniform in flow velocity distribution, large in melt-blown pressure and the like.

The invention provides a boron-nitrogen co-doped hard carbon material and a preparation method thereof in order to solve the technical problems that in the prior art, a hard carbon material is too rich in pore structure and large in crystal layer spacing, storage of lithium/sodium ions is not facilitated, and a lithium/sodium ion battery prepared by taking the hard carbon material as a negative electrode material is low in platform capacity. The preparation method comprises the following steps: obtaining trisodium citrate, urotropine and boron-containing oxide, uniformly mixing, and carrying out carbonization reaction in a protective atmosphere to obtain a composite hard carbon material; the obtained composite hard carbon material is taken out and cleaned with hydrochloric acid and ethyl alcohol in sequence, drying is carried out after cleaning is completed, the boron-nitrogen co-doped hard carbon material with the loose and porous interior is obtained, and the loose and porous structure is more beneficial to improving the adsorption and storage capacity of the material to metal ions/metal compounds and the like; the boron-nitrogen co-doped hard carbon material can be applied to an electrochemical energy storage device so as to improve the discharge capacity and the rate capability of the electrochemical energy storage device.

The invention belongs to the field of high polymer materials, and particularly relates to a melt-blown polypropylene material with a long-acting filtering function and a preparation method and application of the melt-blown polypropylene material. The melt-blown polypropylene material comprises the following components in parts by weight: 100 parts of polypropylene; 0.2-0.5 part of a peroxide initiator; 0.1-1 part of nano diatomite; 0.1-2 parts of nano tourmaline powder; 0.1-2 parts of a silane coupling agent; 0.05-0.3 part of a lubricating agent; 0.05-0.3 part of an antioxidant; and 0.05-0.2 part of a nucleating agent. The nano tourmaline powder is conveyed into pores of the nano diatomite to form the nano composite material through organic solvent infiltration and ultrasonic treatment bymeans of electronegativity and a multi-stage open pore structure of the nano tourmaline powder, so that the problem that electronegativity of melt-blown cloth taking the tourmaline powder as an electret declines due to long-term exposure in air is reduced, the electrostatic adsorption capacity and the long-acting filtering function can be effectively improved, the process is simple, and batch production is facilitated.

The invention relates to a preparation method of a diaphragm modification material for a lithium-sulfur battery. The method comprises the following steps: selecting a two-dimensional sheet material with high conductivity and high catalytic activity as a template, coating the surface of the template with a layer of an ionic polymer through a Schiff base reaction of triaminoguanidino hydrochloride and 1,3,5-triformyl phloroglucinol, then mixing the treated template with polyvinylidene fluoride to obtain a dispersion liquid, coating diaphragm substrate with the dispersion liquid, and conducting drying to obtain a modified diaphragm for the lithium-sulfur battery. According to the invention, the ionic polymer coated sheet material coating the diaphragm can accelerate the reaction kinetics of polysulfide intercepted by the diaphragm in an electrostatic adsorption-rapid diffusion-catalytic conversion mode, so the deposition of a solid product on the diaphragm is avoided, and high electrochemical performance under the conditions of high sulfur content and high sulfur loading is realized.

The invention discloses a method for preparing a layered beta-nickel hydroxide/graphene material by utilizing an induction effect of surface charges. The preparation method comprises the following steps: treating nickel hydroxide with positive charges on the surface by using a cationic surfactant, and adding graphene oxide with negative charges; under a solvothermal reaction, achieving the compounded of Ni(OH)2 and graphene through an electrostatic attraction effect between nickel hydroxide and graphene, achieving the uniform compounding through growth of Ni(OH)2 on the surface of graphene, and obtaining a flaky brucite type nickel hydroxide composite material. The beta-nickel hydroxide/graphene material prepared through the method is good in microstructure, uniform and stable in crystalline phase composition and easy to control in reaction process, and composite materials meeting different electrochemical requirements are prepared by regulating and controlling the proportion of nickelhydroxide to graphene.

The invention discloses electrostatic plasma catalytic air purification and sterilization equipment. The equipment structurally comprises a purification main machine, a maintenance door, an air uniformizing net and an air outlet, the maintenance door is arranged on the outer side surface of the purification main machine, and the air uniformizing net is fixedly embedded in the right end of the purification main machine. The equipment has the following beneficial effects that air circulates in a honeycomb through groove, the air makes contact with a protruding block, and the air flows in an arcshape along the outer side surface of the protruding block, so that the air circulates in the honeycomb through groove, the electrostatic adsorption effect of the interior of the honeycomb through groove on dust particles in the air is improved, and the purified air is exhausted from the air outlet; and a pull block is pulled to enable a rope to slide on the outer side of a fixed pulley, at the moment, the rope pulls the lower end of a clamping plate to rotate, a spring elastically contracts, the lower end of the clamping plate is separated from the upper end of the interior of a box body, then a cover plate is pulled out through a handle, and at the moment, a honeycomb circulating device is taken out of the box body through a connecting frame to be cleaned.

The invention discloses a melt-blown material additive and application thereof, and belongs to the technical field of assistants. The melt-blown material additive comprises the following raw materials in parts by mass: 50-300 parts of a main antioxidant, 200-500 parts of an auxiliary antioxidant, 300-600 parts of an acid acceptor and 400-1000 parts of high-temperature silicone oil. The melt-blown material additive provided by the invention has excellent anti-yellowing performance and melt index stability; the anti-fuming and anti-fading performance is excellent; certain antibacterial performance and electrostatic electret effect are achieved; a prepared melt-blown material is glossy and bright in appearance, good in spinning property, fluffy in silk and good in electrostatic adsorption effect; and glue dripping is avoided.

The present invention discloses a purification composite material, which comprises, by mass, 36 parts of a melt-blown cloth, 1 part of an EVA hot melt glue, and 63 parts of a skeleton material base cloth. According to the present invention, the purification composite material has advantages of low resistance, high filtration efficiency, enhanced electrostatic adsorption capacity, large dust collection capacity, and the like; and the method has advantages of simple production process, low production equipment investment, low production cost, green and environmentally friendly production process, and the like.

The invention provides a medical mask and a preparation method thereof, belonging to the technical field of protective materials. According to the invention, a bio-based composite fiber melt-blown layer is arranged in the mask, and the average pore diameter of the bio-based composite fiber melt-blown layer is set to be 1.5-2.5 microns and is the same as the pore diameter of a polypropylene melt-blown non-woven fabric layer, so filtering of tiny particles is guaranteed, and meanwhile, breathing difficulty of a wearer due to the fact that the pore diameter is too small is avoided. More importantly, hydroxyl groups rich in the bio-based composite fiber melt-blown layer can realize hydrogen-bond bonding with water molecules in an environment under the condition of high humidity, so the water molecules are fixed to participate in triboelectrification. Due to the fact that the electropositivity of water molecules is extremely high, the overall electric quantity of the bio-based composite fiber melt-blown layer is increased, so the electrostatic adsorption capacity of the bio-based composite fiber melt-blown layer is improved; and the larger the humidity of the environment is, the largerthe amount of water vapor exhaled by the human body is, the larger the overall electric quantity of the mask middle layer is, and the higher the adsorption capacity is. The mask provided by the invention can be well applied to a high-humidity environment.

The invention provides a preparation method of electrostatic fiber and a product thereof and belongs to the method of fiber preparation methods. The production method is continuously stable, and the obtained product is completely oil-free and high in electrostatic adsorption. In the technical scheme, oil agent applied to an oil roller is replaced with water, water spraying units are respectively added to positions between the oil roller and a godet roller, a two-way drafting machine, a three-way drifting machine and the front end of a crimping machine to spray water to fiber bundles, and a spray unit is added to the tail end of a heat-setting machine to spray water mist to the fiber bundles. The preparation method can be applied to the production and processing of electrostatic fiber and electrostatic non-woven cloth or complete electrostatic non-woven cloth.

The invention discloses a silicon dioxide microsphere modified multi-scale hybrid carbon fiber, and a preparation method thereof and application of the carbon fiber in preparation of a composite material. The preparation method comprises the following steps: (1) carrying out oxidation treatment on the surface of the carbon fiber to obtain a surface oxidized carbon fiber; (2) grafting phosphonitrilic chloride trimer to the surface of the surface oxidized carbon fiber to obtain the carbon fiber modified by grafting of the phosphonitrilic chloride trimer; (3) carrying out an in-situ polymerization reaction on the phosphonitrilic chloride trimer and polyethyleneimine on the surface of the carbon fiber modified by grafting of the phosphonitrilic chloride trimer, and thus obtaining a polyphosphazene coating modified carbon fiber with positive charges on the surface; and (4) dipping the polyphosphazene coating modified carbon fiber with the positive charges into a nano silicon dioxide microsphere colloidal solution, and attaching the nano silicon dioxide microspheres with negative charges to the surface of the polyphosphazene coating modified carbon fiber through electrostatic adsorptionto obtain the silicon dioxide microsphere modified multi-scale hybrid carbon fiber.