166results about How to "Increased mechanical toughness" patented technology

The invention discloses a preparation method of a reverse osmosis membrane and the reverse osmosis membrane. The preparation method comprises the following steps: (1) adding polyethersulfone into N, N-dimethylacetamide in a heating and stirring state, and stirring for a period of time after charging is completed, so as to obtain a mixed solution; (2) cooling the mixed solution, continuing to add a pore-foaming agent, and stirring for a period of time after charging is completed to obtain a precursor solution; (3) performing vacuum defoaming treatment on the precursor solution to obtain a membrane casting solution; (4) loading the membrane casting solution on a carrier, and then carrying out gel bath treatment to obtain a base membrane; and (5) performing polyamide treatment on the surface of the base membrane to obtain the reverse osmosis membrane. The preparation method disclosed by the invention is simple in process and low in material cost, and the obtained reverse osmosis membrane has more uniform and more through-type pore structures, higher separation efficiency, more excellent chemical stability and better mechanical properties, can adapt to higher operation pressure, and can continuously and stably operate at higher flux under high pressure.

The invention discloses a multifunctional composite hydrophobic membrane and a preparation method thereof, in the hydrophobic membrane, nano silicon dioxide, hydroxyl multi-walled carbon nanotubes and perfluorooctyl ethyl acrylate are polymerized to obtain a modified composite material, the modified composite material is added into a polyvinylidene fluoride-hexafluoropropylene copolymer, fibers are formed through an electrostatic spinning method, the fibers are deposited on a polyester net base lining, and the multifunctional composite hydrophobic membrane is prepared. Nano-silica and hydroxyl multi-walled carbon nanotubes are modified, agglomeration is effectively avoided, the hydrophobic membrane has good mechanical strength and toughness, and microcosmic multi-dimensional roughness of the surface of the membrane can be achieved by introducing an inorganic-organic nano hybrid material. Fluorine atoms in a perfluorooctyl ethyl acrylate structure have relatively low surface energy, so that the surface energy of the film can be remarkably reduced, the surface of the film has low surface energy and a rough structure, and the film is high in hydrophobicity and good in chemical stability.

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

The invention relates to the field of new energy storage materials, and discloses a multifunctional composite perfluorosulfonic acid ion exchange membrane for an all-vanadium redox flow battery, and the composite membrane comprises the following components: perfluorosulfonic acid resin which accounts for 60-90wt% of the total mass of the membrane and is used as a matrix material; the functionalized multi-walled carbon nanotube accounts for 5-15 wt.% of the total mass of the membrane, and carboxyl and hydroxyl are introduced through surface treatment; phosphotungstic acid accounts for 5-20wt.% of the total mass of the membrane, and is anchored on the surface of the functionalized multi-walled carbon nanotube through an electrostatic spinning process; n, N-dimethylformamide and isopropanol are used as solvents, and the solvents are mixed with a perfluorinated sulfonic acid resin solution according to the volume ratio of 1: 1. The proton conductivity, the vanadium ion barrier property and the tensile strength of the composite membrane are obviously superior to those of a traditional Nafion membrane. According to the technical scheme, an efficient and economical solution is provided for improving the overall performance of the all-vanadium redox flow battery, and the method has good application prospects and market value.

The invention discloses a water-retention and soil-moisture-conservation biodegradable agricultural film with a self-water-absorption structure and a preparation method of the water-retention and soil-moisture-conservation biodegradable agricultural film, and belongs to the technical field of degradable agricultural films. The agricultural film is formed by co-extruding an outer hydrophobic layer, a middle mechanical supporting layer and an inner hydrophilic layer, the outer hydrophobic layer is composed of a hydrophobic layer master batch and polyester in a mass ratio of (5-9): (1-5), and the hydrophobic layer master batch is prepared by blending and granulating polylactic acid, hydrophobic layered nanosheets and auxiliaries; the middle mechanical supporting layer is composed of a mechanical supporting layer master batch and polyester in a mass ratio of (5-9): (1-5), and the mechanical supporting layer master batch is prepared by blending and granulating polylactic acid, a bio-based filler and an auxiliary agent; the inner hydrophilic layer is composed of a hydrophilic layer master batch and polyester in a mass ratio of (5-9): (1-5), and the hydrophilic layer master batch is prepared by blending and granulating polylactic acid, super-hydrophilic nanoparticles and an auxiliary agent; the prepared agricultural film has water retention, hydrophobic and hydrophilic functions at the same time, has excellent mechanical strength and toughness, and can meet use requirements.

The invention relates to the technical field of adhesives, in particular to high-thermal-conductivity gel containing modified filler and a preparation method of the high-thermal-conductivity gel. Organic silica gel is taken as a main body, the curing rate is moderate, no selectivity is caused to a base material, a silane coupling agent is introduced to modify thermal-conductivity filler powder, the compatibility of particles and a silica gel matrix is enhanced, and the thermal conductivity of the high-thermal-conductivity gel is improved; the heat conductivity of the sample is further improved, and the reasonable filler grading is beneficial to the filler to form more heat-conducting passages or heat-conducting networks in a polymer matrix, so that the transmission rate of phonons in the material is enhanced, and the heat conductivity of the composite material is enhanced; through combination of the modified large-particle-size spherical alumina powder, the modified small-particle-size spherical alumina powder and the modified angular alumina powder, a heat-conducting network structure in the gel can be improved, and the filler is modified through the modifier, so that the interface bonding force between the filler and a silicone oil matrix can be enhanced; and the heat conduction efficiency is improved on the basis of reducing the thermal resistance.

The invention provides a preparation method of a composite soft capsule shell containing plant starch, and belongs to the technical field of soft capsules. The composite soft capsule shell is prepared from the following components in percentage by mass: 15 to 30 percent of gelatin, 5 to 20 percent of modified plant starch, 1 to 15 percent of composite plant gum, 1 to 10 percent of dopamine grafted pulullan, 10 to 30 percent of plasticizer and 25 to 45 percent of solvent; compared with the existing soft capsule skin, the soft capsule skin prepared by the invention has better mechanical strength and toughness, overcomes the problem of disintegration and delayed release caused by a capsule shell crosslinking aging reaction, is beneficial to the preservation of the soft capsule and reduces the storage cost.

The invention relates to the technical field of anticorrosive coatings, and particularly discloses a ship anticorrosive coating and a preparation method thereof. The preparation method comprises the following steps: firstly, mixing acidized titanium dioxide and zinc oxide nanoparticles with industrial ethanol and a modifier, stirring, washing, filtering and drying to obtain a functional filler; secondly, when the castor oil-based hyperbranched polyester polyol is prepared, dehydration and carboxylation of castor oil and condensation polymerization of the castor oil, propylene glycol and sodium hydroxide are included; then, fluorine-containing hyperbranched epoxy resin is prepared, castor oil-based hyperbranched polyester polyol and epoxy chloropropane react to form a matrix, and a fluorine-containing compound is introduced to complete modification; and finally, uniformly mixing the fluorine-containing hyperbranched epoxy resin, the functional filler and the auxiliary agent to prepare the anticorrosive paint. The ship anticorrosive paint prepared by the preparation method provided by the invention has excellent salt spray resistance and environmental protection property, and the mechanical strength and wear resistance of the paint are effectively improved.

The invention relates to a scratch-resistant modified lens resin material and a preparation process thereof. The lens resin material comprises the following components in percentage by mass: 85-95% of CR-39 resin, 1-3% of nano silicon dioxide, 3-7% of a polyurethane cross-linking agent, 0.1-1% of a surfactant and a proper amount of a solvent for preparing nano particle dispersion liquid. Through proportioning and combination of the components, the resin material has excellent scratch resistance and keeps good optical and mechanical properties at the same time. The preparation process comprises the following steps: preparing a nanoparticle dispersion liquid, modifying the CR-39 resin, carrying out injection molding and preliminary curing, taking out and carrying out final curing, polishing the surface of the lens, coating a scratch-resistant coating and carrying out curing. Through the process steps, a firm scratch-resistant coating is formed on the surface of the lens, and the scratch resistance of the lens is further improved.

The invention relates to the technical field of silicon-based anode materials, in particular to a method for reducing structural deformation and damage in the circulation process of a silicon-based anode. The preparation method comprises the following steps: adopting Ti < 3 > C < 2 > T < x > MXeneamp; the SGC composite material is used as a silicon-based anode active material; the Ti < 3 > C < 2 > T < x > M < X > eneamp; the preparation method of the SGC composite material comprises the following steps: (1) dispersing nano silicon into phenolic resin, then enabling the nano silicon and graphene oxide to be adsorbed and self-assembled to form gel by utilizing a surface charge adsorption effect, and then performing freeze drying, grinding, carbonization treatment and CVD treatment to obtain the SGC composite material; (2) the surface of the SGC composite material is coated with the Ti < 3 > C < 2 > T < x > MXene nanosheets in a vacuum suction filtration mode, and Ti < 3 > C < 2 > T < x > MXene amp is obtained; the invention discloses an SGC composite material.

The invention relates to a preparation method of a double-layer photo-thermal membrane distillation material, and belongs to the technical field of membrane distillation. According to the double-layer film, a polyvinylidene fluoride super-hydrophobic film serves as a hydrophobic base layer, a carbon nano tube / nano semiconductor material composite nano film serves as a photo-thermal layer, and the photo-thermal layer is attached to the hydrophobic base layer through polyurethane. The preparation method is characterized by comprising the following steps: (1) preparing an electrostatic spinning polyvinylidene fluoride super-hydrophobic membrane; and (2) preparing the electrostatic spinning carbon nano tube / nano semiconductor material composite nano film. Meanwhile, the invention provides a photo-thermal driving membrane distillation device. The double-layer photo-thermal membrane distillation material prepared by adopting the method has good photo-thermal conversion capacity, relatively high water vapor flux and long-term stability, and has a wide application prospect in the aspect of fresh water treatment.

The invention discloses an antistatic PC composite material based on graphene and a preparation method thereof.Modified polycarbonate, modified filler and zinc oxide are extruded to prepare the antistatic PC composite material, and in the melt extrusion process of the modified polycarbonate, the modified filler and the zinc oxide, under the action of the zinc oxide, the antistatic PC composite material is prepared. A maleimide group on a side chain of the modified polycarbonate can be subjected to a DA reaction with a furan group on the modified filler to form dynamic crosslinking in the composite material, so that a load can be redistributed when the composite material is stressed, the mechanical strength and toughness of the composite material are improved, and meanwhile, the composite material contains an organic silicon chain segment, so that the mechanical strength and toughness of the composite material are improved. The silicon-oxygen bond has high flexibility, so that the molecular chain of the composite material can maintain certain movement ability at low temperature, the molecular side chain also has a polyaniline chain segment, and the polyaniline chain segment can be in contact with the modified filler, so that a stable conductive path is formed in the composite material, and the antistatic effect of the composite material is ensured.

The invention relates to the technical field of heat conduction and heat dissipation materials, and particularly discloses an efficient heat dissipation graphite material for LED large-screen display and a preparation method of the efficient heat dissipation graphite material. The efficient heat dissipation graphite material for LED large screen display comprises a graphene layer and a thin film coating, and the graphene layer comprises the following raw materials: 50-60 parts of graphite powder, 1-2 parts of nano silver, 25-30 parts of modified nano carbon fibers, 10-15 parts of modified sodium alginate, 3-6 parts of sodium carboxymethyl cellulose, 5-8 parts of a heat conduction agent and 3-5 parts of a plasticizer. The graphite material prepared by the invention has relatively good mechanical properties, heat dissipation performance and corrosion resistance, can meet high requirements of LED large screen display on heat dissipation performance, is widely applied to a heat dissipation system of LED large screen display, effectively reduces the temperature of an LED large screen, improves the display effect and prolongs the service life.

The invention belongs to the technical field of cable production, and particularly relates to a corrosion-resistant high-toughness power cable and a preparation method of the corrosion-resistant high-toughness power cable. Glass fibers; ethylene propylene diene monomer; modifying the basic magnesium sulfate whisker; ultrafine diatomite; zirconium dioxide; white carbon black; an inorganic filler; through the synergistic effect of all the raw material components, the high-temperature-resistant plastic has good strength, mechanical toughness, corrosion resistance, aging resistance and high high-temperature resistance, and is green and environment-friendly; the modified magnesium sulfate whisker and the basic magnesium sulfate whisker have excellent toughening and reinforcing effects on a polymer resin matrix and have a good flame-retardant effect; the polypropylene and the ethylene propylene diene monomer are blended, melted and extruded, the ethylene propylene diene monomer can improve the defect of low-temperature brittleness of the polypropylene, and meanwhile, the mechanical impact of the polypropylene can be enhanced; the zirconium dioxide is adopted, and the zirconium dioxide has excellent high-temperature chemical property stability, corrosion resistance and oxidation resistance, so that the corrosion resistance and the high-temperature resistance of the material can be enhanced.

The invention discloses a preparation method of a composite solid electrolyte membrane. The preparation method specifically comprises the following steps: S1, selecting and proportioning raw materials; s2, preparing a solution; s3, coating and curing; s4, carrying out post-treatment; s5, assembling the battery; s6, performance testing; the invention relates to the technical field of new energy materials. According to the preparation method of the composite solid-state electrolyte membrane and the solid-state battery, by optimizing the ratio of the polymer matrix to the inorganic ceramic filler and introducing the cross-linking agent to enhance an ionic conduction path, high ionic conductivity of the electrolyte membrane is achieved, and the requirement for rapid charging and discharging of the solid-state battery is met; the formation of the cross-linked structure significantly improves the mechanical toughness of the electrolyte membrane, effectively prevents the deformation and fracture of the battery in the charging and discharging process, improves the safety and the cycle life of the battery, and the selected material has good chemical stability and thermal stability, and is suitable for industrial production. And stable operation of the electrolyte membrane in a wide temperature range and in a complex electrochemical environment is ensured.

The invention discloses an advanced treatment method of tungsten beneficiation wastewater, which is characterized in that a composite flocculant is adopted to flocculate the tungsten beneficiation wastewater, and the composite flocculant is mainly composed of cationic polyacrylamide, a flocculant A and lignocellulose, the flocculant A comprises at least one of polyferric sulfate, polyaluminum chloride, polyaluminum ferric chloride, polyaluminum ferric sulfate, ferric sulfate, ferrous sulfate and aluminum chloride. According to the advanced treatment method for the tungsten beneficiation wastewater, under the action of the composite flocculant, the cost of a treatment agent can be reduced to about 0.16-0.20 yuan / m < 3 >, the cost reduction amplitude is as high as 80% or above, the treatment time can be shortened to be within 10 min, the precipitation time is greatly shortened, meanwhile, suspended solids in the wastewater can be effectively removed, actual production requirements are met, and the method is suitable for industrial production. The method has the advantages of low treatment cost, high treatment efficiency, good removal effect, good adaptability and the like, can realize advanced treatment of the tungsten beneficiation wastewater, and is high in use value and good in application prospect.

The invention discloses a pyriproxyfen microcapsule suspending agent. The pyriproxyfen microcapsule suspending agent is prepared from the following raw materials in percentage by weight: 8 to 12 percent of pyriproxyfen, 1 to 3 percent of isocyanate, 0.1 to 0.5 percent of polyamine and the balance of deionized water. Compared with the traditional dosage form, the pyriproxyfen microcapsule suspending agent has the advantages that the toxicity of aquatic organisms can be obviously reduced; the field dosage can be greatly reduced, the environmental pollution and pesticide residues are effectively reduced, and the production and use cost is reduced; the dosage form of the microcapsule suspending agent accords with the trend of future agricultural environmental protection development; the smell can be reduced, the pesticide effect is improved, and the lasting period is prolonged.

The invention discloses high-toughness, high-strength and high-temperature-resistant PMI foam, and relates to the field of high polymer materials. The PMI foam is prepared by mixing methacrylic acid, methacrylonitrile, an initiator, a modifier, a foaming agent, a cross-linking agent and a nucleating agent according to a specific proportion, and carrying out mechanical stirring, water bath polymerization and heating foaming. By controlling the temperature and time of the polymerization reaction and completing the polymerization reaction under specific foaming conditions, the obtained PMI foam material shows excellent toughness, strength and high temperature resistance, and is suitable for the field of light high-strength structural materials.

The invention provides a self-repairing long-acting anticorrosive coating material as well as a preparation method and application thereof, and relates to the technical field of anticorrosive paint preparation. The coating material is prepared from the following raw materials in parts by mass: 50 to 70 parts of bio-based polyurethane, 10 to 20 parts of microcapsules, 5 to 15 parts of nano filler and 5 to 10 parts of auxiliaries, according to the microcapsule, an isocyanate mixture serves as a core material, hexamethylene diisocyanate serves as a wall material, and the isocyanate mixture comprises a prepolymer generated through a reaction of lignin and hydrogenated xylylene diisocyanate and excessive hydrogenated xylylene diisocyanate in the reaction. The method for preparing the self-repairing long-acting anti-corrosion coating material is simple and convenient to operate and easy for industrial production, can remarkably improve the anti-corrosion performance of the base material, reduce the maintenance cost and prolong the service life in practical application, and has a wide market application prospect.

The invention provides a method for preparing a Cu-Al2O3-EP mixed corrosion-resistant coating, which comprises the following steps: carrying out surface treatment on a base material, and sequentially grinding, polishing, cleaning, drying and sandblasting to obtain a base material to be sprayed; the preparation method comprises the following steps: mechanically mixing Cu powder, Al2O3 ceramic particles and epoxy resin EP powder to obtain cold spraying prefabricated powder; and the prefabricated powder is subjected to low-pressure cold spraying to a to-be-sprayed base material, after the coating is cooled and cured, polishing and correction are conducted, and the Cu-Al2O3-EP mixed corrosion-resistant coating is obtained. The prepared coating has excellent mechanical strength and corrosion resistance, has good thermal stability and toughness, and is suitable for various harsh application environments.

The invention discloses a fiber reinforced composite material with a strain-damage self-sensing function and a preparation method of the fiber reinforced composite material. The fiber reinforced composite material comprises the following components: 0.1-0.5 part of dopamine; 0.1 to 1 part of a hydroxylated multi-walled carbon nanotube; 3-5 parts of nano titanium dioxide; 20 to 60 parts of acetone; 20 to 80 parts of absolute ethyl alcohol; 80 to 120 parts of deionized water; 1-10 parts of polyethylene glycol; 0.1 to 2 parts of ammonia water; 0.1 to 1 part of polyvinylpyrrolidone; 1-3 parts of a silane coupling agent; 60-80 parts of unidirectional fiber cloth; 1 to 5 parts of polycaprolactone (PCL); according to the preparation method disclosed by the invention, the service life of the resin-based composite material can be prolonged, the material is endowed with intelligent self-sensing and self-healing functionalization, and meanwhile, the fiber-reinforced composite material can sense the occurrence and development of damage through resistance change by utilizing the high electric conduction and heat conduction characteristics of the multi-walled carbon nanotubes; the damage is monitored in real time, the relation between the damage and the resistance change can be deeply understood, and the maintenance period is shortened.

The invention belongs to the technical field of functional polymers, and particularly relates to a high-water-absorption konjac hydrogel polymer and a preparation method thereof. The konjac hydrogel polymer is prepared from the following raw materials in parts by weight: 30 to 40 parts of acetylated konjac glucomannan, 10 to 15 parts of modified chitosan, 5 to 8 parts of calcium chloride solution, 1 to 3 parts of acetic acid solution, 3 to 5 parts of nano cellulose, 2 to 5 parts of beewax, 10 to 15 parts of MCT medium chain triglyceride and 1 to 3 parts of emulsifier. According to the invention, through acetylation modified konjac glucomannan, hydrophilicity is reduced, water absorption is delayed, and stability of an acidic environment is improved; the mechanical strength is enhanced through crosslinking, the hydrophobicity is improved through chitosan modification, and the mechanical strength and toughness are improved through nanocellulose; the surface is coated with a beeswax and MCT mixture to adjust the surface property and delay water absorption; an interface induction method is combined with a freeze-drying technology to generate a porous structure, so that the water absorption efficiency and the structural integrity are improved.

The invention provides high-degradation epoxy resin and a preparation method of an insulating material, and relates to the technical field of epoxy resin, the molecular structural formula of the high-degradation epoxy resin is # imgabs0 #, R1 is Cn1H2n1, n1 is equal to 1-6, R2 is Cn2H2n2, n2 is equal to 1-6, R3 is Cn3H2n3 + 1 or Cn3H2n3OC3H5O, n3 is equal to 0-6, R4 is Cn4H2n4 + 1 or Cn4H2n4OC3H5O, and n4 is equal to 0-6; secondly, the invention also provides a preparation method of the high-degradation epoxy resin, and the method comprises the following steps: preparing 1, 2, 4, 5-tetrahydroxyphenol, aliphatic ketone and p-toluenesulfonic acid according to a molar ratio, and preparing a polyhydroxy compound with condensed ring ketal as a molecular skeleton; then a polyhydroxy compound, epichlorohydrin and a catalyst which are prepared according to the molar ratio are subjected to a ring-opening reaction, a ring-closing reaction and the like, and faint yellow condensed ring ketal epoxy resin is obtained; the high-degradation epoxy resin disclosed by the invention has the characteristics of mild degradation conditions and high degradation speed.

The invention belongs to the technical field of powder coatings, and particularly relates to a high-wear-resistance and salt-fog-resistance epoxy powder coating and a preparation method thereof. The epoxy powder coating with high wear resistance and salt spray resistance is prepared from the following raw materials in parts by weight: 40 to 60 parts of modified epoxy resin, 15 to 30 parts of carboxyl-terminated polyester resin, 10 to 25 parts of fluorosilane modified composite filler, 10 to 25 parts of curing agent, 0.5 to 1 part of benzoin, 0 to 20 parts of pigment and 0.3 to 2 parts of other auxiliaries. The invention provides a high-wear-resistance and salt-fog-resistance epoxy powder coating and a preparation method thereof, which are used for solving the technical problems of poor hardness, weather resistance and salt fog resistance of the epoxy powder coating in the prior art.

The present application relates to the field of environment-friendly materials and its preparation technology, and particularly relates to a degradable environment-friendly paper cup interior coating and a preparation method thereof. The method comprises the following steps: firstly, synthesizing polymerizable quaternary ammonium salt surfactant (RPKO-X), and then introducing the polymerizable quaternary ammonium salt surfactant and a bio-based polymer solution into a polyacrylate molecular chain by a redox initiation polymerization method, so as to obtain a degradable acrylate emulsion for paper cup interior coating. By introducing the hydrophobic monomer RPKO-X with emulsifier characteristics, a stronger crosslinking network is formed, which can significantly improve the water resistance and oil resistance of the coating. Meanwhile, by introducing the bio-based material polyvinyl alcohol 2688, the environmental friendliness of the coating is enhanced, and the rapid degradation of the coating after use is promoted. By using the redox initiation polymerization system, the method is simple to prepare, can be prepared under mild conditions, and the emulsion particle size is uniform and stable.

The invention provides a method for preparing a Ti-Al2O3-PVDF (Polyvinylidene Fluoride) mixed seawater corrosion-resistant coating by low-pressure cold spraying, which comprises the following steps: carrying out surface treatment on a base material, and sequentially grinding, polishing, cleaning, drying and sandblasting to obtain a base material to be sprayed; the preparation method comprises the following steps: mechanically mixing Ti powder, Al2O3 ceramic particles and polyvinylidene fluoride (PVDF) powder to obtain cold spraying prefabricated powder; and the cold spraying prefabricated powder is subjected to low-pressure cold spraying to a to-be-sprayed base material, after the coating is cooled and cured, polishing and correction are conducted, and the Ti-Al2O3-PVDF mixed seawater corrosion resistant coating is obtained. The prepared coating not only has excellent mechanical strength and corrosion resistance, but also has good thermal stability and toughness, is suitable for various harsh application environments, especially can be applied to ocean engineering environments, and can resist seawater scouring and corrosion.

This invention belongs to the field of composite material technology, specifically disclosing a high-dielectric-constant, low-dielectric-loss polyphenylene sulfide composite material, its preparation method, and its applications. The composite material comprises the following components in parts by weight: 100 parts of polyphenylene sulfide matrix, 10-60 parts of high-dielectric-constant nanofiller, 0.5-8 parts of metal nanoparticles, and 0.5-5 parts of surface modifier. This invention utilizes the aforementioned high-dielectric-constant, low-dielectric-loss polyphenylene sulfide composite material, its preparation method, and its applications. The composite material exhibits a high dielectric constant and achieves low dielectric loss. It also enhances its mechanical strength and toughness, enabling the composite material to maintain its electronic properties while possessing excellent physical properties.

The invention discloses a method for preparing porous ceramics by mixing solid wastes. The method comprises the following steps: (1) raw material pretreatment: dehydrating waste sludge; the waste heat preservation cotton is subjected to crushing treatment; (2) porous ceramic preparation: uniformly mixing the pretreated waste sludge, waste thermal insulation cotton and coal gasification slag to obtain a mixture; performing compression molding on the mixture to obtain a porous ceramic green body, sintering the porous ceramic green body at high temperature, and cooling to obtain the porous ceramic. According to the method, resource utilization of the waste sludge, the coal gasification slag and the waste heat preservation cotton is achieved.

The invention discloses a silane-terminated reactive phosphate flame retardant, a preparation method thereof and application of the silane-terminated reactive phosphate flame retardant in building external wall thermal insulation polyurethane, and belongs to the technical field of macromolecular flame-retardant materials. The structure of the flame retardant is (RO) 3Si-Z-NH-COO-[X-NH-COO] n-Y-O-P (= O) (OCH3) CH3, Z is a C2-C6 alkylene group, X is a C4-C12 alkylene group, n is 1-5, and Y is a C2-C6 hydroxyl-substituted alkylene group, so that not only is good compatibility considered, but also the cohesiveness with a building base material is greatly improved, and the flame retardant can be applied to the field of building materials. A phosphorus-based flame-retardant source, a long-chain flexible spacer group and a hydrolyzable silane end group integrated in a molecular structure serve as polyol components to directly participate in polyurethane reaction, so that the flame-retardant grade and the heat preservation property of the foam are greatly improved.

The present invention discloses a plug-in type groundwater ion concentration change detection device and detection method, the detection device includes an electric measuring plug-in, a data box, a solar module and a host computer; an annular electrode for detecting groundwater resistivity is distributed on the electric measuring plug-in, and two adjacent annular electrodes form an electrode pair; the data box includes a lithium battery, a voltage regulator, a timing collector, a data collector, a data storage card, a DTU data transmitter, a signal antenna, an external port, an insulating cushion and a cover plate. During detection, the present invention inserts the electric measuring plug-in into different depths of groundwater, provides power current through the lithium battery and the voltage regulator, and uses the annular electrode electrically connected to the timing collector and the data collector to continuously and automatically collect data on the groundwater, and wirelessly transmits the collected data to the host computer through the DTU data transmitter and the signal antenna according to the communication protocol, and analyzes the changes in groundwater ion concentration at different depths according to the resistivity inversion method, thereby improving the test accuracy and work efficiency.