537 results about "Polymer modified" patented technology

The invention discloses high-toughness ultra-high performance concrete and a preparation method thereof, and relates to the technical field of polymer modified materials thereof. The concrete is composed of a cementitious material composite system, a fiber-reinforced system and a polymer modifier, the cementitious material comprises Portland cement, nano-silica, a rice hull ash-based auxiliary cementitious material and gradient grading quartz powder, and the fiber system adopts steel fiber / basalt fiber / polypropylene fiber multi-scale composite reinforcement. And a polyurethane emulsion interface modifier is matched. During preparation, a dry mixing-fiber dispersion-wet mixing three-stage process is combined with a microfluidization emulsification and segmented polymerization technology, so that uniform dispersion of fibers and matrix-fiber interface reinforcement are realized. The scheme has high strength, high toughness and industrial feasibility, and is suitable for harsh engineering scenes such as bridge joints and explosion-proof structures.

The invention discloses a high-toughness impervious polymer modified cement-based grouting material and a preparation method thereof, and belongs to the technical field of building repair materials. The component A is prepared from a cementing material, an admixture, a fine aggregate, a composite expanding agent, a polymer for concrete modification, fibers, an early strength agent, a water reducing agent, a composite retarder, a defoaming agent, an air entraining agent, a nano material and a functional component. The system solves the technical contradiction of toughness-strength-impermeability in the polymer modified cement-based material, and the material has excellent comprehensive performance: the initial fluidity is greater than or equal to 330 mm, the 28d compressive strength is greater than or equal to 82 MPa, the breaking strength is greater than or equal to 16.8 MPa, the bending-compression ratio is greater than or equal to 0.19, the impermeability pressure value is greater than or equal to 2.6 MPa, and the material is suitable for the fields of prefabricated buildings, tunnel engineering and the like.

The invention discloses a heavy metal chelating agent for industrial wastewater and a preparation method of the heavy metal chelating agent, and belongs to the technical field of sewage treatment.The preparation method comprises the steps that 2-hydroxyphenylboronic acid is subjected to graft modification through acrylic acid and polymerized on the surface of activated biomass porous carbon powder with acrylic acid, boron-containing polymer modified porous carbon is obtained, and then ferric chloride hexahydrate serves as an iron source; a boron-containing polymer modified porous carbon surface and aminated magnetic adsorption nanospheres are obtained, B-N coordination is formed between the aminated magnetic adsorption nanospheres and the boron-containing polymer modified porous carbon surface, boron element fixation is achieved through modified copolymerization, loss caused by long-time use of the boron element is avoided, lasting and stable chelation is guaranteed, activated biomass porous carbon serves as a carrier, and macromolecular resin serves as a coating layer. The environment-friendly biochar has the advantages of favorable degradability, greenness, degradability, safety and high efficiency, and avoids the problem of secondary pollution caused by the use of a chelating agent.

The invention relates to the technical field of asphalt modifiers, and particularly discloses an asphalt regenerant as well as a preparation method and application thereof. The asphalt modifier comprises an oil phase, a polymer phase, a nano reinforced phase and a functional additive phase, wherein the oil phase comprises petrochemical oil and vegetable oil; the polymer phase comprises four-arm radiation star-shaped SBS and a rubber powder lysis solution; the nano reinforced phase comprises silane coupling agent modified nano montmorillonite and graphene; the functional additive phase comprises maleic anhydride grafted polyethylene and sucrose ester. The asphalt regenerant provided by the invention is suitable for various types of aged asphalt, in particular to aged polymer modified asphalt, each failure phase of the aged polymer modified asphalt is accurately repaired through a multi-phase synergistic mechanism, full-dimension regeneration of the aged polymer modified asphalt from a molecular scale to macroscopic performance is realized, and the asphalt regenerant has a wide application prospect. Excellent applicability and reliability are shown in regeneration of various types of aged asphalt, and a powerful guarantee is provided for high-quality implementation of road engineering.

The invention relates to the technical field of asphalt performance analysis, in particular to a method for detecting and analyzing physical properties of polymer modified asphalt. According to the invention, the collected asphalt sample is subjected to pretreatment means of vacuum degassing, multi-angle image bubble monitoring and constant-speed stirring, the uniformity of the asphalt sample is judged according to physical state parameters at different positions, the reliability of subsequent detection data is further improved, and a plurality of uniformly-divided target asphalt samples are respectively placed in the constant-temperature containers; the method comprises the following steps: recording the heat conduction temperature of each target asphalt sample at different monitoring points in a constant-temperature water bath in real time, carrying out penetration detection on each target asphalt sample after the sample reaches heat balance, carrying out penetration index analysis according to the incidence relation between the temperature and the penetration, and evaluating the physical properties of the polymer modified asphalt based on the penetration index. The penetration data under different temperature gradients can be accurately obtained, the physical properties of the polymer modified asphalt can be comprehensively and accurately evaluated, and a reliable basis is provided for engineering quality control.

The invention relates to a high-utilization-rate RAP asphalt regenerant and a preparation method thereof. The regenerant comprises the following components in percentage by mass: 30%-50% of a petroleum-based softener, 10%-20% of biomass oil, 5%-15% of a polymer modifier, 1%-5% of a surfactant, 0.5%-2% of an antioxidant and 2%-10% of a functional additive. All the components have a synergistic effect, so that the asphalt modifier can effectively permeate aged asphalt, supplement light oil, reduce viscosity, recover flexibility and remarkably improve high-temperature rut resistance and low-temperature crack resistance of regenerated asphalt. By reasonably selecting the raw materials and proportioning, the production cost is reduced, the RAP utilization rate is improved, and the environment-friendly raw materials are adopted, so that the requirements of environmental regulations are met. The result of the embodiment shows that after the regenerant is added, the performance recovery of the aged asphalt is good, the viscosity of the regenerated asphalt mixture is moderate, the needle penetration recovery rate is high, the softening point is high, the ductility is large, the comprehensive performance is excellent, and the regenerant is superior to commercially available products.

The present disclosure pertains to methods for enhancing the properties of conventional Li / Al-LDH by integrating polymers to provide compositions comprising a Li / Al-LDH material and a polymer. The present disclosure further pertains to methods of using such polymer-modified-LDH to improve lithium adsorption and extraction performance. The disclosed methods can comprise incorporating the polymer during the precipitation reaction or by mixing the Li / Al-LDH product with a polymer solution under specific conditions. During the lithium extraction process, the disclosed compositions comprising a Li / Al-LDH material and a polymer can be used as an excellent lithium adsorbent to capture lithium ions from low-concentration lithium resources due to its improved physicochemical properties. The disclosed compositions comprising a Li / Al-LDH material and a polymer provides compositions for lithium extraction from low concentration resources, as well as expands the scope of lithium adsorbent material development.

The invention relates to the technical field of high polymer material and polymer modification, in particular to modified asphalt based on nano material reinforcement and a preparation method, the modified asphalt comprises matrix asphalt subjected to molecular cutting and compounding, a nano titanium dioxide-graphene-carbon nano tube ternary composite material, zwitter-ion and silane synergistically modified nano montmorillonite, the rubber powder subjected to special treatment, the bio-based and traditional compound plasticizer and the 2-mercaptobenzimidazole and sulfur compound stabilizer are synergistically modified. The modified asphalt has the advantages of excellent performance, high-temperature stability, low-temperature crack resistance, strong aging resistance, efficient and environment-friendly preparation process, low energy consumption, short period and good nanometer material dispersion, and adopts the bio-based plasticizer to promote the green development of the asphalt industry.

The present disclosure relates to a fluoride-free binder material for a positive electrode, and a preparation method therefor and the use thereof. Provided are a fluoride-free binder material for a positive electrode and a preparation method therefor. A copolymer of acrylonitrile and an acrylate is used as a main body structure, an ionic monomer is introduced, and a polyfunctional olefin monomer is introduced during polymerization to increase the branching degree of a polymer, thereby preparing a highly-branched acrylonitrile polymer modified via copolymerization, which polymer is used as a fluorine-free binder material for a positive electrode. The modified binder can provide more sites for contact between active materials and between a current collector and the active materials so as to further enhance the bonding ability, thereby increasing the overall cohesive force and improving the adhesion to the current collector; and the binder can effectively inhibit the fracture and delamination of an electrode sheet during processing, ensures the compactness of a positive electrode material even in the case of a low use amount, and retains structural integrity and cycling stability during cycling.

The invention belongs to the technical field of building materials, and discloses an early-strength polymer modified cement-based grouting material and a preparation method thereof. The grouting material disclosed by the invention is prepared from the following raw materials in parts by weight: 100 to 115 parts of a cementing material, 100 to 115 parts of river sand, 20 to 23 parts of water, 2 to 2.5 parts of a water reducing agent, 0.02 to 0.04 part of an expanding agent, 0.22 to 1.76 parts of an acrylic emulsion and 0.04 to 0.08 part of a de-foaming agent, wherein the cementing material comprises 71-81 parts of Portland cement, 9-19 parts of sulphoaluminate cement, 6-8 parts of silica fume and 11-15 parts of fly ash microbeads. The early-strength, high-strength and high-fluidity cement-based grouting material can be obtained under the conventional curing condition by adopting the combined action of the acrylic emulsion polymer, the Portland cement and the sulphoaluminate cement, the plastic expanding agent, the polycarboxylate superplasticizer and the defoaming agent, and has good economic benefits and practical values.

The invention relates to the technical field of waterproof materials, and particularly discloses a self-adhesive polymer modified asphalt waterproof material as well as a preparation method and application thereof. The self-adhesive polymer modified asphalt waterproof material is prepared from the following raw materials in parts by mass: 45 to 55 parts of asphalt, 8 to 12 parts of softening oil, 10 to 15 parts of modifier, 8 to 12 parts of desulfurized rubber and 10 to 15 parts of filler, the modifier comprises the following raw materials: an ethylene-octylene copolymer, butadiene styrene rubber, coumarone resin and a functional modified material; the functional modified material is prepared from illite and phthalic acid ester. Through the design of the modifier and the proportion design of the raw material components, the synergistic interaction effect of the raw materials is fully played, the comprehensive performance of the waterproof material is improved, and the self-adhesive polymer modified asphalt waterproof coiled material prepared from the waterproof material has excellent high and low temperature properties, persistent adhesivity, peel strength, aging resistance and water resistance.

The invention relates to the technical field of road construction and maintenance, and discloses a multi-polymer modified emulsified asphalt in-situ cold recycling mixture and a preparation process thereof, the multi-polymer modified emulsified asphalt in-situ cold recycling mixture comprises the following components by weight: 600-680 parts of nano hybrid emulsified asphalt; 250 to 350 parts of plasma activated recycled aggregate; 15 to 30 parts of a microcapsule phase change catalyst; 5 to 10 parts of bio-based interface reinforcing fiber; and 3-8 parts of a rare earth doped curing accelerator. According to the invention, through multi-technology cross-scale fusion of a quaternary polymer rigid-flexible synergistic system, a gradient emulsification-vacuum self-assembly process, double-shell intelligent catalytic release and rare earth gradient distribution-magnetic field induced fiber arrangement, the bottlenecks of unbalanced high and low temperature performance, easy interface stripping, poor aging resistance, extensive process regulation and control and the like of a traditional asphalt material are overcome; and the strength and toughness-durability-self-adaption performance synergistic jump is realized.

The invention discloses a high-temperature-resistant high-performance neodymium-iron-boron permanent magnet material and a preparation method thereof, and belongs to the technical field of neodymium-iron-boron permanent magnet materials. The material is prepared from neodymium iron boron magnetic powder, auxiliary metal, hyperbranched polyimide polymer modified nano zirconium oxide and a silane coupling agent through mixing, smelting, crushing, sintering, tempering, coating and curing. The hyperbranched polyimide polymer modified nano-zirconia is introduced into the components, so that the permanent magnet material has excellent thermal stability, the permanent magnet material can still keep stable magnetic performance and mechanical performance at high temperature, the attenuation resistance is good, the thermal demagnetization is low, and the interface bonding strength is improved after the nano-zirconia is modified by hyperbranched polyimide. The interfacial compatibility between the nano zirconium oxide and the polyimide is enhanced through click chemical reaction, and the interfacial bonding strength of the nano zirconium oxide on a neodymium iron boron matrix is improved. The three-dimensional branched structure of the hyperbranched polyimide can form physical crosslinking points in the material, so that the mechanical strength of the material is enhanced.

The invention discloses a preparation process and application of a modified anti-segregation admixture for machine-made sand, and relates to the technical field of polymer modified materials. Modified polyoxyethylene ether and vinyltrimethoxysilane are adopted to construct a steric hindrance effect, styrene-acrylate emulsion is introduced to form an interpenetrating network structure, and nano silicon dioxide and bentonite are cooperated to construct a multi-scale enhancement system. Silane coupling agent hydrolysis and nano grafting reaction are realized through gradient heating, and the particle size distribution D90 of the emulsion is less than or equal to 5 microns by combining an ultrasonic-mechanical synergistic emulsification process. A three-dimensional network is formed by the composite thickening agent and anhydrous sodium sulfate, and after in-situ curing at 25 DEG C with RH greater than or equal to 80%, 0.1-0.5% of the additive is added, so that the slump retention value of the machine-made sand concrete is greater than 315mm (1h), the pressure bleeding rate is less than or equal to 9.7%, the 28d compressive strength is improved by 24.5-72.6 MPa, and the segregation resistance coefficient is reduced to 0.08-0.11. The technology breaks through the limitation of insufficient adaptability of traditional admixtures to machine-made sand, and is particularly suitable for long-distance pumping construction of high-stone-powder-content machine-made sand concrete.

The invention relates to the technical field of special functional coating materials for lost foam casting, and particularly discloses a special coating for a large machine tool casting lost foam as well as application and a use method of the special coating. According to the invention, the full-temperature-range functional composite material and the composite aggregate are used for synergistic reinforcement, and mullite is used for high-temperature reinforcement; the temperature-sensitive polymer modified graphite can realize intelligent temperature response of graphite performance; spodumene is used as a thermal expansion adaptive fluxing agent, so that medium-temperature healing and thermal expansion adjustment of a coating system are facilitated; the composite reinforced fibers are reinforced and toughened aiming at large thermal stress of thick and large parts; as an ultralow-temperature glazing agent, the boron-containing glazing agent can form an initial liquid phase at about 450 DEG C to seal the surface of the coating and purify a ventilation channel; the rare earth oxide serving as a high-temperature phase stabilizer can be dissolved in mullite crystal lattices, so that the high-temperature phase stability is improved, and ceramic nodes are refined. Through raw material design, on the premise of ensuring moderate air permeability, the ultrahigh strength and crack resistance of a coating system at extremely high temperature are improved.

The invention relates to the technical field of bamboo winding composite material pipelines, and discloses a bionic bamboo joint connector of a bamboo winding pressure pipeline and a processing technology of the bionic bamboo joint connector, the bionic bamboo joint connector is arranged at the connecting part of two sections of axially aligned bamboo winding pipelines, and the bionic bamboo joint connector sequentially comprises an inner lining layer and an outer lining layer from inside to outside, the embedded steel bar reinforcing layer consists of a reinforcing material and embedded steel bar glue; the film covering restraint layer is composed of fiber reinforced cloth and impregnating resin; the socket fastening layer is composed of a metal fastening piece which is connected with the two pipes in a bridging mode. A protective layer is poured, and the whole connector is wrapped with polymer modified cement mortar; the invention further provides a processing technology of the bionic bamboo joint connector. The processing technology comprises the following six steps of pretreatment, lining welding, embedded steel bar reinforcement, film covering constraint, socket fastening and pouring protection. Through the composite structure of crossed truss type embedded steel bars, polymer modified mortar pouring and socket fastening, the connector obtains high connection strength, excellent anti-drawing performance and long-term durability.

The invention belongs to the technical field of building materials, and provides a cement-based composite material with an organic-inorganic interpenetrating structure and a preparation method of the cement-based composite material. According to the preparation method disclosed by the invention, the monomer and the polymer containing the active group are introduced, the in-situ polymer formed by the monomer through in-situ polymerization and the polymer containing the active group form a double-network polymer, a single-network structure is refined, and the single-network structure and a cement hydration reaction product which is synchronously performed form an organic-inorganic interpenetrating structure; the interaction between double networks and the cement-based material is enhanced, meanwhile, the microstructure is optimized, the mechanical property of the single polymer modified cement-based material can be improved, the compressive strength is improved, and the breaking strength is further enhanced; the prepared cement-based composite material with the organic-inorganic interpenetrating structure has excellent breaking strength and compressive strength.

The invention discloses a retarder for delaying cement setting time and a preparation method thereof, and belongs to the field of cement admixtures. The retarder is anionic polymer modified chitosan, and the preparation method comprises the following steps: (1) fully dissolving chitosan in a weak acid solution to obtain a chitosan solution; (2) fully dissolving an anionic polymer in a solvent to obtain an anionic polymer solution; and (3) adding the anionic polymer solution into the chitosan solution, fully stirring, carrying out electrostatic adsorption reaction, and centrifuging, washing, drying and crushing after the electrostatic adsorption reaction is finished to obtain the anionic polymer modified chitosan. Chitosan is modified through electrostatic adsorption of an anionic polymer to form a compound, the compound is added into cement, and the coagulation time of the cement is prolonged by utilizing the complexing action of functional groups of the compound on calcium ions and the surface adsorption action on cement particles, so that the construction operability is favorably improved; and the preparation process is simple, and the cost is low.

The present invention discloses a multifunctional adsorption membrane based on modified PVDF, and a preparation method and application thereof, and relates to the technical field of polymer modified materials. The multifunctional adsorption membrane is based on polyvinylidene fluoride, and by introducing functional materials such as zeolite powder, modifiers and polyethylene glycol, the hydrophilicity, anti-pollution ability and removal efficiency of heavy metal ion residues of the membrane are significantly improved. Specifically, the preparation of the modifier adopts the composite of β-cyclodextrin and polyvinyl alcohol, and introduces 3-aminopropyltriethoxysilane to ensure that the modification effect is durable and stable. The preparation method of the present invention includes the steps of raw material preparation, solution preparation, phase transformation membrane formation and post-treatment, which can effectively control the thickness and pore size distribution of the membrane, thereby optimizing its performance. Experimental results show that the application of the modified PVDF membrane in water treatment has the advantages of efficient removal of pollutants, increased water flux and extended service life, and is suitable for a variety of complex water quality scenarios such as municipal sewage, industrial wastewater and agricultural runoff.

The utility model discloses a layered waterproof structure for a temporary reserved hole part of a building roof face, which comprises a temporary hole formed in a concrete floor, a two-way steel bar with the diameter of 8mm is implanted in the inner wall of the temporary hole, a square water stop strip is arranged on the two-way steel bar, and filling concrete is arranged on the outer side of the water stop strip. The filling concrete is coated with an interface agent, the outer side of the interface agent is provided with a cement-based capillary crystalline waterproof coating, and the thinnest part is provided with C5.0 lightweight aggregate concrete with the thickness of 30; a non-cured rubber asphalt waterproof coating with the thickness of 3.0 mm, a viscous polymer modified asphalt waterproof coiled material with the thickness of 3.0 mm, an S20 cement mortar protective layer with the thickness of 10, an extruded polyethylene foam plastic heat preservation layer with the thickness of 100, a low-strength-grade mortar isolation layer with the thickness of 10 and a C20 fine aggregate concrete protective layer with the thickness of 40 are sequentially arranged on the outer side of the C5.0 lightweight aggregate concrete with the thickness of 3.0 mm. The characteristics and functions of different materials are combined, so that the waterproof performance and durability of the building or the structure are effectively improved.

The invention discloses an efficient quick-setting hole sealing material and a preparation method thereof, and relates to the technical field of polymer modified materials. The hole sealing material is composed of a cement matrix, a polymer modifier, aluminum sulfate, quartz sand, a polycarboxylic acid water reducer, magnesium hydroxide and a cellulose ether thickener. By optimizing the proportion of the components, the material shows excellent leakproofness and construction efficiency in mine gas extraction. Due to the rapid setting characteristic, effective sealing can be formed in a short time, and the sealing agent is suitable for emergency construction scenes. In addition, due to the introduction of the polymer modifier, the mechanical strength and durability of the material are remarkably improved, the permeability coefficient is reduced, and the safety is improved. The preparation method is simple and convenient, and only the components need to be mixed, added with a proper amount of water and uniformly stirred. The novel hole sealing material not only solves the problem that a traditional material is easy to crack in a high-temperature environment, but also has advantages in the aspect of economy, and is suitable for large-scale popularization and application.

The invention discloses high-toughness and high-adhesion polymerized modified cement mortar with iron-ore slag and a preparation method of the high-toughness and high-adhesion polymerized modified cement mortar, and belongs to the technical field of concrete structure repair materials. High-strength, high-toughness and high-adhesion polymer modified mortar is formed, and the requirements of rapid repair engineering of a cement concrete structure for toughness and adhesion performance are met; the iron-ore slag is adopted to replace part of carborundum as the aggregate, so that the early strength of the mortar is ensured on the premise of meeting sustainable development, and the basic requirements of concrete structure repair are met; meanwhile, the fiber, the redispersible latex powder and the modified rubber powder are added, so that the toughness of the material is improved, the bonding performance is improved, and the stress coordination of the repairing material and an original concrete structure is guaranteed.

The invention discloses an efficient nano silicon dioxide tackifier and a preparation method and application thereof, and relates to the field of oilfield chemistry, the preparation method comprises the following steps: taking nano silicon dioxide, ultrasonically dispersing in a first solvent, and then adding a small amount of a second solvent and a certain amount of a silane coupling agent to obtain preliminarily modified nano silicon dioxide; thirdly, stirring and dispersing acrylic acid and ammonium persulfate in a second solvent to obtain polymer modified silicon dioxide; and finally, dispersing the product, glucosamine sulfate, NMI (N-methylimidazole) and TCFH (N, N, N, N-tetramethyl chlorourea hexafluorophosphate) into a third solvent to react, thereby obtaining the product. The viscosity of crude oil and the oil displacement efficiency can be effectively improved under the conditions of high-salt and high-water-content oil reservoirs, the viscosity of the formed emulsion is increased along with the rise of the water content, and the flow resistance can adapt to the change of the water content, so that the swept volume is increased, and the requirement of the high-salt and high-water-content oil reservoirs for improving the recovery efficiency is met.

The invention provides a composite coating for a battery diaphragm as well as a preparation method and application thereof, and relates to the technical field of secondary batteries. Specifically, the composite coating for the battery diaphragm comprises a heat-resistant polymer, a modified ceramic material, a binding material and a flame-retardant material, wherein the modified ceramic material comprises a ceramic material of which the surface is grafted with an MOFs (Metal-Organic Frameworks) material, and the ceramic material comprises porous ceramic particles and ceramic nanowires. By designing and providing the coating, the liquid absorption and liquid retention performance of the battery diaphragm are remarkably improved, the liquid injection time of the battery can be greatly shortened, the manufacturing efficiency is improved, and the cycle life of a battery cell is prolonged; meanwhile, the diaphragm disclosed by the invention is excellent in flame retardance and heat resistance, can effectively improve the safety performance of the battery, and has a good application prospect.

The application provides a polymer microsphere profile control water plugging agent and a preparation method and application thereof, and the preparation method comprises the following steps: dispersing molybdenum disulfide nanosheets in water, adding a template carrier to form a Pickering emulsion; performing a first polymerization reaction on the Pickering emulsion, polymer monomer A, a RAFT reagent and an initiator to obtain hydrophilic polymer grafted copolymer nanosheets; performing a second polymerization reaction on the hydrophilic polymer grafted copolymer nanosheets, polymer monomer B and an initiator in a solvent to obtain one-side polymer modified nanosheets; removing the template carrier, and performing a third reaction on the one-side polymer modified nanosheets and amino acids in water to obtain the polymer microsphere profile control water plugging agent. The polymer microsphere profile control water plugging agent prepared by the application is resistant to temperature and salt, can enter deep strata, is uniformly distributed in high-permeability layers, has good profile control and water plugging effects, and can improve recovery efficiency.

The invention relates to a method for efficiently preparing hydroxylamine hydrochloride. The method comprises the following steps: mixing a diacetylmonoxime solution and a hydrochloric acid solution, pretreating through a pressurized nano-bubble fluidized bed, and carrying out reaction distillation under heating and pressurizing; after the reaction is finished, cooling reaction liquid, performing primary filtration and suction filtration through cross-flow filtration equipment, and collecting hydroxylamine hydrochloride crystals; and washing the crystal with absolute ethyl alcohol, recovering ethyl alcohol through cross-flow filtration equipment, and finally freeze-drying to obtain the high-purity hydroxylamine hydrochloride. The preparation method comprises the following steps: stirring quinoline-8-yl acrylate, tributyltin acrylate, 4-vinyl benzocyclobutene, ethanol and benzoyl peroxide to obtain a mixed solution; immersing the PTFE membrane subjected to low-temperature plasma pretreatment into the mixed solution, and then carrying out ultrasonic cleaning and vacuum drying to obtain a polymer modified PTFE membrane; the hydroxylamine hydrochloride prepared by the method disclosed by the invention has relatively high purity and yield, and meanwhile, the content of heavy metal ions and the content of water are effectively reduced.

The invention relates to the technical field of polymer composite materials, in particular to a cable polymer composite material for a wind turbine blade, which is prepared from the following raw materials in parts by weight: a polymer base material; a reinforcing material; a polymer modified material; a functional additive; a performance modifier; the functional additive is prepared from an anti-ultraviolet agent, an antioxidant, a silane coupling agent and nano titanium dioxide. According to the invention, the epoxy modified polyether-ether-ketone and bisphenol A epoxy resin compounded base material is matched with a continuous glass fiber, carbon fiber chopped strand and nano silicon nitride multi-element reinforcing system, so that the core short board of insufficient mechanical properties of the traditional material is thoroughly solved, and a magnesium hydroxide, aluminum hydroxide, expanded graphite and nano montmorillonite compounded flame-retardant system is also selected, so that the flame-retardant performance of the material is greatly improved. The flame-retardant cable material is high in flame retardance, free of toxic gas release, capable of meeting the environment-friendly requirement, capable of improving the material interface bonding force and long-term service reliability and capable of meeting the requirement for the service life of 20 years or above of wind power blade cables.

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 discloses a flame-retardant foaming advertisement board and a production process thereof, and belongs to the technical field of advertisement boards. The foaming advertisement board comprises the following raw materials in parts by weight: 100-105 parts of polyvinyl chloride resin, 3-4.5 parts of a stabilizer, 50-60 parts of polymer modified calcium carbonate, 0.2-0.5 part of a pigment, 10 parts of maleic anhydride grafted polyvinyl chloride, 0.5-1 part of a foaming agent, 6-10 parts of a foaming regulator and 0.5-1.5 parts of a lubricant, and the preparation method comprises the following steps: adding the raw materials into a mixing machine, mixing for 30 minutes at the temperature of 100-115 DEG C, cooling to 40-50 DEG C, and carrying out extrusion molding to obtain the foaming advertisement board. According to the flame-retardant foaming advertisement board provided by the invention, the transverse dimension shrinkage rate is less than or equal to 0.05% and the longitudinal dimension shrinkage rate is less than or equal to 0.45% when being tested at 80 DEG C, so that the flame-retardant foaming advertisement board has relatively high dimensional stability and flame-retardant property, and provides reliable guarantee for outdoor advertisement and decoration.

The invention relates to a synthesis method of functionalized (poly) silazane, which comprises the following steps: providing heat energy or light energy under the action of an iron catalyst, and completely reacting in a corresponding solvent in the presence of an additive and a functionalization reagent to realize the breakage and functionalization of carbon-hydrogen bonds on a chain in the (poly) silazane compound so as to obtain a polar functionalized product; a (poly) silalkane (oxo) compound; according to the method, commercialized silane, siloxane and polysiloxane compounds are directly used as raw materials, carbon-hydrogen bond functionalization is carried out in a catalytic mode, the method has the advantages of being simple in reaction, easy to operate, short in reaction time, mild in reaction condition, high in reaction efficiency, easy in product separation and purification, good in substrate universality and the like, and a large amount of precious metal and heavy metal salt are prevented from being used; the method is suitable for industrial production in the fields of small molecule synthesis, polymer modification, new material synthesis, luminous silica gel, waste silica gel recovery and the like.