1103 results about "Solid content" patented technology

The invention relates to a bionic Al / SiC composite material with a three-dimensional network multilevel structure and a preparation method of the bionic Al / SiC composite material, and belongs to the technical field of new material preparation. According to the method, through the collaborative process of freeze casting and organic foam impregnation, the problem that in the prior art, the multilevel aperture and the complex network structure are difficult to cooperatively regulate and control is solved. The preparation method comprises the following specific steps: preparing tert-butyl alcohol-based ceramic slurry, impregnating the slurry with polyurethane foam, performing freeze casting molding, removing a solvent through freeze drying, performing high-temperature sintering to form SiC ceramic with a three-dimensional reticular hierarchical pore structure, and finally preparing the Al / SiC composite material through a vacuum pressure infiltration process. Wherein a sintering aid is added into the slurry, so that the sintering temperature is obviously reduced; the specification (40-60 ppi) of polyurethane foam, the solid phase content (20-30 vol.%) of slurry, the freezing speed (0-90 DEG C) and the content (5-20 wt.%) of a sintering aid are regulated and controlled. And the cross-scale collaborative design of micron-scale directional holes and millimeter-scale mesh holes is realized. The Al / SiC composite material prepared by the invention has the advantages that the compressive strength, fracture toughness and other properties are obviously higher than those of the traditional single-aperture porous ceramic, and the Al / SiC composite material is suitable for the fields of manufacturing and energy absorption of precise instruments, electronic packaging and optical devices.

The invention relates to the technical field of nano materials, and particularly discloses a preparation method of surface modified nano calcium carbonate for a battery diaphragm coating. According to the method, the technical paths of microemulsion confinement crystal form regulation and control, gradient surface modification and boehmite compounding and porosity regulation and control are fused, and the functional nano calcium carbonate adaptive to the battery diaphragm coating is prepared. According to the technical scheme, limestone is used as a raw material, after calcination and digestion, the particle size of nano calcium carbonate is controlled through microemulsion carbonization (a cyclohexane-span 80-n-butyl alcohol system); a silane coupling agent KH560-KH570 is adopted for gradient modification to introduce an electrophilic functional group, boehmite is compounded to form a composite coating, and the porosity is regulated and controlled by adjusting the solid content in coating slurry and the coating speed. The method is stable in process and high in compatibility, and meets the requirements of diaphragm coatings of lithium ion batteries and solid-state batteries.

The invention discloses a high-solid-content MIL-101 (Fe) / PIM-1 mixed matrix membrane and a preparation method thereof, and belongs to the technical field of gas separation membranes. The preparation method comprises the following steps: firstly, dissolving an iron source in a PIM-1 polymer solution to form a homogeneous membrane casting solution; forming the obtained membrane casting solution, and removing the solvent to obtain a PIM-1 / Fe (II) composite substrate containing Fe (III); then, the substrate is alternately immersed in a terephthalic acid methanol solution and a ferric salt methanol solution, and MIL-101 (Fe) is generated in the polymer matrix through in-situ limited crystallization by layer-by-layer limited crystallization. According to the method, the problem of interfacial compatibility between the MOF filler and the polymer matrix is effectively solved, and high loading capacity (up to 52.9 wt.%) of MIL-101 (Fe) is realized without agglomeration. Meanwhile, the membrane has excellent COplasticizing resistance and long-term operation stability, and has a wide application prospect in the fields of carbon capture and the like.

The invention belongs to the field of functional composite materials, and particularly relates to low-viscosity and high-dispersity aluminum oxide slurry and a preparation method thereof.The low-viscosity and high-dispersity aluminum oxide slurry is prepared from a newly-designed phosphono-carboxyl block copolymer and biquaternary ammonium salt polyether silane as composite modifiers; and efficient anchoring and stable dispersion of the surfaces of alumina particles are realized through the synergistic effect of molecular structures. The phosphono-carboxyl block copolymer is prepared through controllable polymerization and deprotection reaction, and strong chemical bonding is formed between a phosphono group and the surface of aluminum oxide; the biquaternary ammonium salt polyether silane is subjected to click chemical synthesis, and electrostatic adsorption of quaternary ammonium salt and the steric hindrance effect of a polyether chain are combined. When the slurry is prepared, the two modifiers are sequentially added into water, the aluminum oxide powder is added after the pH value is adjusted, finally, the isobutylene maleic anhydride copolymer and the defoaming agent are introduced, and the slurry is obtained through vacuum defoaming and filtering. The slurry prepared by the method has the characteristics of high solid content, low viscosity and good dispersion stability.

The invention discloses an epoxy resin modified emulsified asphalt micro-surfacing mixture and a preparation method thereof.The preparation method comprises the steps that matrix asphalt is subjected to gradient heating to 75-90 DEG C, nano silicon dioxide is added, stirring and shearing are conducted, and activated matrix asphalt is obtained; preparing a water-borne epoxy resin emulsion with the solid content of 45-50%, and controlling the mass ratio of epoxy resin to an emulsifier to be (8-10): 1 to form a stable dispersion system with the particle size of less than or equal to 1 mu m; preheating the mineral aggregate, adding the activated matrix asphalt while stirring, and continuing stirring; adding the water-borne epoxy resin emulsion, and continuously stirring; adding a vinylamine curing agent, continuously stirring to ensure that the curing agent is uniformly dispersed and avoid partial incomplete reaction, finally adding cement and water, and continuously stirring to form a uniform micro-surfacing mixture. The pavement performance such as high-temperature stability, low-temperature crack resistance and the like is remarkably improved through raw material system upgrading and process innovation, VOCs emission is greatly reduced, and green and environment-friendly effects are achieved.

The invention discloses high-compaction-density modified spherical lithium iron phosphate and a preparation method and application thereof.The preparation method comprises the steps that a composite iron source precursor and modified phenolic resin are compounded to form a spherical inner core, and then the spherical inner core is coated with a lithium-phosphorus mixed layer to construct a core-shell structure; the modified spherical lithium iron phosphate with the characteristics of'spherical core-porous shell 'is prepared by introducing boron nitride nanosheets as a structure-directing agent and a doping source and combining a dynamic gradient sintering process, and the modified phenolic resin is obtained by grafting water-soluble phenolic resin and polyethylene glycol, and the solid content of the modified phenolic resin is greater than or equal to 50%. The modified lithium iron phosphate with the compaction density larger than or equal to 2.55 g / cm < 3 > and the capacity retention ratio larger than 92.0% after 1C circulation 2000 times is prepared, and the technical bottlenecks that doping is not uniform, morphology is out of control and the compaction density is low in a traditional process are solved.

The invention discloses high-solid-content single-walled carbon nanotube slurry as well as a preparation method and application thereof, and the preparation method comprises the following steps: step 1, mixing a small-molecule dispersing agent and a solvent in an ultrasonic dispersion manner to form a first solution; step 2, mixing the first solution and a single-walled carbon nanotube in an ultrasonic dispersion manner to form a second solution; step 3, mixing the second solution and a polymer dispersant in an ultrasonic dispersion manner to form a third solution; and step 4, dispersing the third solution in a micro-jet high-pressure homogenization manner to obtain the high-solid-content single-walled carbon nanotube slurry. The preparation method of the single-walled carbon nanotube slurry provided by the invention is green, environment-friendly, low in cost and high in production efficiency, the single-walled carbon nanotubes are dispersed orderly, the viscosity is moderate and stable, and the single-walled carbon nanotube slurry is not rebounded, and the conductivity can be remarkably improved when the single-walled carbon nanotube slurry is applied to positive electrode slurry or negative electrode slurry of a lithium ion battery.

The invention discloses a bio-based polymer emulsion as well as a preparation method and application thereof, and belongs to the technical field of aqueous polymer emulsions. The emulsion comprises an aqueous continuous phase, bio-based polymer particles, a stabilizing system, and a bionic catechol adhesion component. Specific modified starch is innovatively utilized for assistance, and a bionic adhesion shell layer is constructed on the surface of a bio-based polymer core in situ. Compared with similar products in the market that adhesion to inert substrates can be improved only by adding a large amount of tackifying components, the scheme has the advantages that excellent dry and wet adhesion can be realized on the surfaces of difficult-to-adhere substrates such as polypropylene and polyethylene only by constructing an extremely thin interface functional layer, and the functionalization efficiency and economical efficiency of the bio-based material are greatly improved. Meanwhile, the system effectively overcomes the industrial problem that the high-solid-content emulsion is easy to settle, has excellent storage stability and construction adaptability, and conforms to the development trend of sustainable barrier packaging and high-performance water-based coatings in the future.

The invention belongs to the field of polyester resins, and provides a weather-resistant polyester resin for low-temperature curing and a preparation method thereof. A three-step progressive design that a polyester prepolymer is terminated by silane and then is subjected to hydrolytic polycondensation with tetraethyl orthosilicate to construct an organic-inorganic covalent hybrid network is adopted; through cooperation of the condensation catalyst, the hindered amine light stabilizer and the ultraviolet absorbent, the mechanical properties that the pencil hardness reaches the HB level or above and the cross-cut test level is not higher than the first level under the low-temperature curing condition of not higher than 100 DEG C are achieved, and the long-term weather resistance that the color difference is not larger than 2.0 and the gloss retention rate is not lower than 80% after 500-hour artificial accelerated aging is achieved. The technical problems of poor storage stability and difficulty in consideration of high solid content and low viscosity caused by insufficient low-temperature curing capacity and non-uniform organic-inorganic hybridization of the traditional polyester resin are solved, and the polyester resin has wide application value in the fields of building coatings, automobile refinishing paints, wood coatings and the like with strict requirements on low-temperature curing and weather resistance.

The invention provides a glass fiber impregnating compound for reinforcing epoxy resin as well as a preparation method, a product and application of the glass fiber impregnating compound. The impregnating compound comprises effective components and water, the solid content is 5.0%-10.0%, and the balance is water; the impregnating compound comprises the following effective components in percentage by mass: 5%-32% of the silane coupling agent, 35%-80% of the film-forming agent, 10%-30% of the lubricant, 1%-6% of the surface additive, 2%-10% of the cross-linking agent and 1%-6% of the pH value regulator. The silane coupling agent is a mixture of a cationic aminotoluene functionalized silane coupling agent and a cationic benzimidazole silane coupling agent. The glass fiber yarn produced by adopting the impregnating compound is less in hairiness, good in flexibility, good in interface compatibility with epoxy resin, excellent in transverse tensile property and suitable for producing a wind power blade base material, and when the base material and the epoxy resin are used for vacuum infusion, the resin is rapidly and completely soaked, and the service life of the resin is prolonged. And the poured composite material has few forming defects and excellent static mechanical properties and fatigue resistance.

The invention provides an organic silicon modified glass bead and an application thereof in a silicone adhesive. The organic silicon modified glass beads comprise hollow glass beads and organic silicon grafted on the surfaces of the hollow glass beads, and preparation raw materials of the organic silicon comprise a silicone oil modifier with the solid content of 25%-34% and a platinum catalyst, the silicone oil modifier comprises 100 parts by mass of vinyl silicone oil, 26-30 parts by mass of hydrogen-containing silicone oil, 3-5 parts by mass of vinyl trimethoxy silane and a first organic solvent. The organic silicon modified glass beads have large surface roughness, and can be combined with a silicone adhesive matrix through chemical bonds and stably dispersed in the silicone adhesive when being applied to the silicone adhesive as a matting agent, so that the surface roughness of the cured silicone adhesive is increased, the matting effect is good, and the long-acting matting effect is realized; and after being stored for a long time, the matte silicone adhesive still has a relatively good matting effect and good storage stability.

A method for preparing a silver powder, comprising: subjecting a first silver salt, a first dispersing agent and a first reducing agent to a first treatment, so as to obtain silver crystal nucleuses; and subjecting the silver crystal nucleus, a second silver salt, a second dispersing agent, a second reducing agent and a modifying agent to a second treatment, so as to obtain a silver powder, wherein the modifying agent comprises lauric acid, decanoic acid and undecanoic acid. The silver powder prepared by means of the method has good dispersity and wettability, a narrow particle size distribution, a small particle size and high sintering activity, and is not prone to agglomeration in a conductive silver paste, thereby enabling the conductive silver paste to have a high solid content and endowing the conductive silver paste with good conductivity. The present invention further relates to a silver powder, a conductive silver paste, an electronic device and electric equipment.

The invention relates to the technical field of material forming, and discloses a preparation method of a 3D printing electronic-grade high-purity silicon carbide component, and the preparation method of the 3D printing electronic-grade high-purity silicon carbide component comprises the following steps: preparing a high-solid-content slurry, mixing silicon carbide powder with the purity of more than or equal to 99.99% with a nano dispersant, and then carrying out acoustic resonance dispersion to obtain the slurry; the solid content of the uniform slurry ranges from 55 vol% to 65 vol%, and the viscosity of the uniform slurry ranges from 1000 mPa.s to 1500 mPa.s. According to the preparation method of the 3D printing electronic-grade high-purity silicon carbide component, in order to improve the purity of the silicon carbide component, silicon carbide powder with the purity larger than or equal to 99.99% is adopted, acoustic resonance dispersion is carried out during slurry preparation so as to control the silicon impurity content to be smaller than or equal to 0.028 wt%, and a 3D printing cavity and a printing head take plastic or high-purity silicon carbide as a base body or a coating to avoid pollution; and meanwhile, in the degreasing treatment, the CO2 concentration is monitored to ensure that organic components are completely removed so as to reduce residual carbon, so that the effect of preparing the electronic-grade high-purity silicon carbide part is realized.

The invention relates to the technical field of wastewater treatment, in particular to wastewater treatment and residue filtering equipment for a solid-state battery, which comprises a screw shaft, the screw shaft comprises an inner screw and an outer screw which are coaxially sleeved, and the inner screw and the outer screw are in transmission connection through a reverse rotation assembly. Spiral blades which are reversely arranged are arranged on the inner screw rod and the outer screw rod in a surrounding manner, one end of the spiral shaft penetrates through the sludge outlet end of the dewatering machine body and is externally connected with a reciprocating lead screw which is coaxially arranged, and a back pressure plate for extruding sludge is arranged at the sludge outlet end of the dewatering machine body. When the spiral shaft pushes sludge, inner and outer layer materials are subjected to reverse shearing and rubbing force, so that the problem that a filter screen of traditional equipment is blocked due to fine-particle sludge is solved; meanwhile, the back pressure plate can perform regular axial reciprocating motion at the discharging end, so that possibly formed dry and hard blocks are effectively broken, the blocking risk of the discharging port is thoroughly avoided, the dehydration efficiency and the dehydration degree are improved, and the solid content of a finally produced mud cake is ensured.

The invention relates to the technical field of chemical equipment, and discloses a strong heat release solid-liquid reactor, which comprises a reactor main body, a sectional heat exchange assembly and a feeding assembly, the reaction flow channel adopts a flat rectangular cross section design, the depth size is smaller than the width size, the depth direction is perpendicular to the heat exchange wall surface, and while radial heat transfer is enhanced through a micro-layer liquid film, solid particles can smoothly pass through by utilizing a larger width space. The flow channel adopts a variable cross-section expansion structure along the flow direction, so that the on-way resistance is effectively reduced, and the blockage caused by the increase of the solid content is prevented. The heat exchange assembly is physically divided into at least two independent temperature control areas through the heat insulation partition piece, and segmented precise temperature control of impurity strong cold inhibition in the initial stage and conversion promotion through heating in the later stage is achieved. According to the invention, the contradiction between low heat exchange efficiency and easy blockage of the flow channel in the strong exothermic solid-liquid reaction is effectively solved, and the reaction safety, the product purity and the yield are improved.

The invention discloses a lightweight heat-insulation cement-based composite material, and relates to the technical field of cement-based composite materials, the lightweight heat-insulation cement-based composite material comprises the following material components by weight: 40-60 parts of a cement matrix, 20-35 parts of a lightweight aggregate, 5-12 parts of a polymer modifier, and 0.5-0.3 part of a functional additive, the cement matrix is sulphoaluminate cement or Portland cement, and the functional additive is a water-based composite material. The lightweight aggregate comprises hollow glass beads with the particle size of 0.1-0.5 mm, expanded perlite with the particle size of 0.5-2 mm and surface modified aerogel particles, the aerogel particles are silicon dioxide aerogel or silicon carbide aerogel, the surface area of the aerogel particles is 700-600 m / g, the pore diameter of the aerogel particles is 40-50 nm, the polymer modifier is acrylate-styrene copolymer emulsion, and the particle size of the polymer modifier is 1-10 m / g. The solid content of the acrylate-styrene copolymer emulsion is 50-45%, the glass transition temperature of the acrylate-styrene copolymer emulsion is-10 DEG C to 15 DEG C, and the functional additive comprises a cellulose ether thickener, a polycarboxylate superplasticizer and a nano aluminum oxide dispersion liquid.

The invention provides a water-borne epoxy resin composite coating and a preparation method thereof, and the water-borne epoxy resin composite coating comprises the following components in parts by mass: 70-90 parts of a water-borne epoxy emulsion component A; 10-30 parts of a curing agent component B; wherein the component A of the waterborne epoxy emulsion is prepared from the following raw materials in parts by mass: 50 to 70 parts of self-emulsifying epoxy resin, 5 to 10 parts of hydrophilic modifier, 15 to 25 parts of pigment filler, 2 to 5 parts of dispersion stabilizer, 1 to 3 parts of cosolvent and 5 to 10 parts of deionized water. Self-emulsifying modification of resin molecules is realized by adopting nonionic polyether grafted self-emulsifying epoxy resin and matching with a hydrophilic modifier with a specific hydroxyl value, an emulsifier does not need to be added, and the viscosity of a coating system is reduced from the molecular level, so that the solid content of the component A of the waterborne epoxy emulsion is more than or equal to 70%, the viscosity is less than 200mPa. S, and the technical bottlenecks of high solid content and low viscosity are broken through; and the requirement for single-time thick coating construction is met, the construction efficiency is greatly improved, and construction period prolonging and cost increasing caused by multiple times of construction are avoided.

This application provides a glass fiber surface treatment agent, its preparation method, glass fiber, fabric, and their applications. The glass fiber surface treatment agent comprises an effective component and water, with a solid content of 5.8–10.5%. The effective component, by weight percentage, includes: a coupling agent of 7.3–17.3%, a penetrant of 0.3–2.8%, a lubricant of 7.7–13.2%, a film-forming agent of 58.3–81.9%, a toughening agent of 0.4–1.8%, and additives of 2.4–6.6%. The film-forming agent comprises film-forming agent A and film-forming agent B. Film-forming agent A is a composition of phenolic epoxy emulsion and bisphenol A type epoxy emulsion, and film-forming agent B is an alicyclic epoxy resin emulsion. Glass fibers produced using this glass fiber surface treatment agent exhibit excellent bundle properties, wear resistance, and weaving performance. The glass fiber fabric undergoes rapid and complete static impregnation in epoxy resin, resulting in high mechanical strength and meeting the performance requirements of new energy vehicle battery casings.

This application discloses a stirring device 100 suitable for high-solid content slurry, including a stirring tank body 101, a feed pipe assembly 102 forming a powder inlet 102a, a liquid inlet 102b, and a feed channel communicating with the stirring space; a feed spindle, a feed motor; a feed paddle; further including: a soaking pipe assembly 107 forming a soaking channel communicating with the feed channel; a plurality of soaking paddles rotatably disposed in the soaking channel with the central axis as the axis of rotation; and a plurality of soaking columns disposed between two soaking paddles. Among them, the soaking paddle includes: a connecting shaft portion for forming a non-rotatable connection with the feed spindle; and a paddle blade portion for simultaneously exerting a force along the axial direction and the centrifugal direction of the central axis on the mixture of powder and liquid in the soaking channel when the soaking paddle rotates. The beneficial aspect of this application is that it provides a stirring device suitable for high-solid content slurry that improves the mixing effect by setting soaking paddle blades and soaking columns to cooperate in pre-soaking the powder.

The invention belongs to the field of polymer coatings, and provides an aliphatic polyurethane finish paint with high adhesion resistance and a preparation method thereof. According to the invention, a polyurethane phase and a polyacrylate network are adopted to construct a semi-interpenetrating network structure, cyclic carbonate and hydrolyzable silane end groups are introduced into double-end functionalized polysiloxane, and a silicon-oxygen network surface layer is self-assembled after coating and curing; the high crosslinking density with the gel fraction being greater than or equal to 85%, the wear-resistant and anti-slip performance with the dry friction coefficient being greater than or equal to 0.50 and the abrasion mass loss being less than or equal to 0.030 g / 500 r, the ultra-low surface energy anti-dirt performance with the water contact angle being greater than or equal to 105 degrees and the surface free energy being less than or equal to 22 mN / m and the environment-friendly characteristic that the volatile organic compound content is less than or equal to 50 g / L are achieved; the three technical contradictions of high gel fraction and ultralow surface energy silica surface layer coupling, high hardness wear resistance and high friction coefficient maintenance, and high solid content and low volatility organic compound processing window and nano gradient silica surface layer construction are solved, and the nano gradient silica coating has wide application value in the field of industrial terraces and metal base material coatings.

The invention belongs to the technical field of polyester window films, and particularly relates to a high-transmittance polyester film and a preparation method thereof. The composite window film comprises a wear-resistant layer and a BOPET base material layer, the wear-resistant layer is obtained by curing a coating liquid, and the coating liquid comprises the following raw materials in parts by mass: 100 parts of an epoxy acrylic resin emulsion, 8-12 parts of silane modified silicon dioxide, 3-5 parts of a modifier, 0.1-0.3 part of a light stabilizer and 40-60 parts of water. The modifier is prepared by reacting epoxy cyclohexyl ethyl POSS and amino polyethylene glycol hydroxyl according to a molar ratio of 1: (8.1-8.2), the solid content of the epoxy acrylic resin emulsion is 30-35wt%, and the epoxy acrylic resin emulsion is prepared by carrying out emulsion polymerization on an unsaturated epoxy monomer, a soft monomer and a hard monomer according to mass ratios of (15-25): (20-40): (40-60). The modifier has a flexible spacer arm formed by a rigid nano-sized inorganic siloxane cage core and a polyethylene glycol chain, and the flexible spacer arm acts on the surface of silicon dioxide to play a role in fixing and also plays a role in a three-dimensional barrier to block silicon dioxide agglomeration, and meanwhile, the wear resistance and the light transmittance of the polyester film are improved.

This invention relates to the field of polymer materials, and specifically discloses a waterborne polyurethane, its neutralization preparation method, and its applications. This waterborne polyurethane is prepared by mixing the following raw materials in parts by weight: 10-30 parts by weight of a polyurethane prepolymer containing carboxyl functional groups, 5-25 parts by weight of a polyurethane prepolymer containing amino functional groups, 0.6-2.0 parts by weight of an organic amine chain extender, and 50-80 parts by weight of deionized water; wherein the polyurethane solid content accounts for 20-50% of the total weight of the raw materials. The preparation process of this invention is simple, the product is stable during storage, and it does not contain volatile or migrating amine neutralizing agents such as triethylamine or dimethylethanolamine, thus meeting the stringent regulatory requirements for applications such as food contact materials.

The present application relates to a kind of core-shell type water-based hydroxyl acrylate microspheres emulsion and its preparation method and application. Core-shell water-based monodisperse acrylate emulsion is prepared by in-situ multi-stage variable speed drop method, including the following steps: core layer polymerization: after heating kettle bottom liquid, initiator solution is added, then multi-stage variable speed drop is added to core layer pre-emulsion containing core layer monomer, after adjusting pH using neutralizing agent, polyacrylate core layer emulsion is obtained;Shell polymerization: multi-stage variable speed drop is added to polyacrylate core layer emulsion containing shell pre-emulsion containing shell monomer and initiator solution, heat preservation, cooling, after reaction is completed, terminating agent is added, after adjusting pH using neutralizing agent, core-shell type water-based hydroxyl acrylate microspheres emulsion is obtained. The emulsion is used in exterior wall coating, wood coating or antirust coating field. Compared with prior art, the microspheres emulsion synthesized by the present application has the advantages of high solid content, high hydroxyl value, uniform particle size, etc.

To provide a hinge cap which exhibits a comfortable click feeling, prevents the leakage of a high-viscosity content containing a solid content, and suppresses the deterioration of sealing between a nozzle and a lid even after repeated use.SOLUTION: A hinge cap comprising a cap body and a lid connected to the cap body via a hinge, wherein the cap body has a cap body top plate, a cap body skirt portion, a content pouring nozzle, and a cap body bank, the lid has a lid top plate, an inner ring, a lid skirt portion, and a lid skirt portion fitting projection, and a thickness of the inner ring at a contact portion between the inner ring and the content pouring nozzle when the lid is closed is - 0. 20mm or more and + 0. 20mm or less with respect to a thickness of the content pouring nozzle.SELECTED DRAWING: Figure 1

Described herein is an easy-to-compost water based adhesive composition and the preparing method thereof. The compostable water-based adhesive composition, comprising (a) at least one vinyl acetate-ethylene copolymer, (b) at least one phosphoric acid-modified starch, (c) at least one vegetable oil, and (d) water, wherein the composition has a solid content of larger than 20%.

The invention belongs to the field of fiber materials, and provides a hollow acrylic fabric with thermal insulation performance and a preparation process thereof. The composite design of an acrylonitrile-based copolymer shell layer and an inner cavity silicon dioxide aerogel layer is adopted, a boric acid ester cross-linked network is formed through borax bath treatment to lock a three-dimensional crimp structure, and a hydrophobic modified silicon dioxide aerogel layer with the thickness of 50-200 nm is constructed in a fiber inner cavity; the mechanical-structural synergy that the single-fiber breaking strength is not lower than 3.5 cN / dtex under the condition that the hollowness degree is 30%-45% and the fiber dry-state crimp number is not smaller than 12 / 25 mm is achieved, the thermal resistance of the fabric reaches 0.065 m.K / W to 0.075 m.K / W, the air permeability is kept at 150 mm / s to 250 mm / s, and the fabric has the advantages of being good in air permeability, good in air permeability and the like. The contradiction between mechanical bearing and hollow structure design under the high-solid-content wet spinning fine denier condition, the contradiction between structural stability and fatigue durability of boric acid ester cross-linked three-dimensional curl after multiple times of water washing and the contradiction between low gram weight and high thermal resistance and the heat transfer mechanism of breathable comfort are solved, and the wide warm-keeping garment application value is achieved.

The present application belongs to the technical field of glass fiber sizing agent, and particularly relates to an anti-creep glass fiber sizing agent and a preparation method thereof. The anti-creep glass fiber sizing agent comprises effective components and water, and the solid content of the anti-creep glass fiber sizing agent is 3-12%. The effective components comprise the following components according to weight percentage: maleic anhydride modified long-chain branched polyolefin wax 65.5-86.9 wt.%, coupling agent 5-10 wt.%, nucleating agent 1-8 wt.%, physical cross-linking component 5-12 wt.%, initiator 0.1-0.5 wt.%, and surfactant 2-4 wt.%. The present application can effectively solve the problem of insufficient anti-creep ability of the glass fiber reinforced polypropylene material in the prior art, and at the same time, the material has good mechanical properties and fatigue resistance, which plays an important role in improving the long-term dimensional stability of the polypropylene material.

The application provides a phosphorus-aluminum inorganic adhesive for a lithium-sulfur battery and a preparation method thereof. The phosphorus-aluminum inorganic adhesive with a viscosity of 10-500 mPa.s and a solid content of 30-80% is prepared through a hydrothermal reaction of a phosphoric acid or hydrogen phosphate solution and an aluminum compound. The product has the characteristics of good strength, high-temperature resistance, and flame resistance. Compared with a traditional organic adhesive, the phosphorus-aluminum inorganic adhesive significantly reduces the use amount of the lithium-sulfur battery, increases the adhesion of the electrode material and the current collector, limits the diffusion of lithium polysulfide, enhances the transport capacity of lithium ions, and prolongs the cycle life of the battery. More importantly, the phosphorus-aluminum adhesive has excellent flame resistance, and when applied to the lithium-sulfur battery, the flame resistance of the battery can be improved, the use safety of the battery is improved, and the phosphorus-aluminum adhesive is expected to become a new type of environmentally-friendly flame-resistant lithium-sulfur battery adhesive.

This invention discloses a retractable multi-material 3D printing head, which includes an extrusion structure, a first feeding structure, a second feeding structure, and a third feeding structure. By connecting the three feeding structures with one extrusion structure, the extrusion retraction problem in 3D printing of multiple materials is solved. The extrusion structure has three meshing screws, resulting in high mixing efficiency during slurry mixing. Simultaneously, each of the three feeding structures has a screw, allowing for better control of the amount of high-viscosity material added to the extrusion structure. Furthermore, the three screws inside the extrusion structure are specially designed irregular-shaped screws. While achieving conventional mixing, they not only better control the material extrusion amount but also work together with the screws in the feeding structures to achieve slurry retraction when printing high-viscosity materials, improving the forming effect and allowing for a wider solid content range in the formed ceramic slurry.

The invention relates to a hydrophilic acrylic pressure-sensitive adhesive. The pressure-sensitive adhesive comprises an acrylic copolymer, polyvinyl alcohol or a derivative thereof, a non-reactive surfactant and a neutralizer according to the solid content of an emulsion, the acrylic copolymer is obtained by copolymerization of n-butyl acrylate, 2-ethylhexyl acrylate, 2-hydroxyethyl acrylate, acrylic acid, methyl methacrylate and a boric acid functional monomer emulsion containing a 2, 1-benzoxaborazole group. The preparation method comprises the following steps: dropwise adding a pre-emulsion, lagging dropwise adding an initiator and carrying out thermal-insulation polymerization to obtain a copolymer emulsion, adding polyvinyl alcohol or a derivative thereof at a specific temperature, neutralizing to a specified pH value, and carrying out segmented drying to form the film. The hydrophilic acrylic pressure-sensitive adhesive disclosed by the invention has both hydrophilicity and wet stability while keeping the adhesion performance.