3971 results about "Polystyrene" patented technology

It is disclosed new conducting and stretchable hydrogels and “one-pot” process to making them from natural and eco-friendly components, including gelatin, chitosan, and glycerol. Various conducting materials, such as poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), thermally reduced graphene (TRG), or MXene are introduced in the hydrogels to enhance their conductivity. The resulting conducting hydrogels exhibit remarkable robustness, do not require crosslinking agent, and possess a unique thermo-reversible property, simplifying the fabrication process and ensuring enhanced long-term stability. Moreover, their fabrication is sustainable, employing environmental-friendly materials and processes, while retaining their skin-friendly characteristics. It is also disclosed hydrogel electrodes that were tested for ECG signal acquisition and outperformed the commercial electrodes. The hydrogel-based electrodes deliver high-quality ECG signals, boasting a superior signal-to-noise ratio (SNR) and remarkable resilience against interference and motion artifacts, compared to their commercial AgCl counterparts.

The invention relates to a high-protection-performance metering box with polystyrene foam, and relates to the technical field of metering boxes, the metering box comprises a box body, two box doors are oppositely hinged to the box body, a plurality of heat dissipation holes are formed in two opposite side walls of the box body, and a protection plate for protecting the heat dissipation holes is installed outside the box body; two parallel fixing plates are vertically installed on the side face, away from the box door, of the box body, arc-shaped notches are formed in the side faces, away from the box body, of the fixing plates, flexible fixing ropes are detachably installed outside the fixing plates, and the flexible fixing ropes and the arc-shaped notches in the fixing plates jointly surround the periphery of a telegraph pole; according to the application, when the metering box is installed on the telegraph pole, the flexible fixing rope and the arc-shaped gap in the fixing plate jointly surround the periphery of the telegraph pole, so that the metering box can be pre-locked; and an acting point is provided for installation personnel, and the possibility of deviation or dislocation of the box body is greatly reduced.

The invention discloses a lithium battery diaphragm coating based on a nano material and application thereof, and relates to the technical field of lithium battery diaphragms. The coating comprises the following raw materials in parts by weight: 15-25 parts of polystyrene maleic anhydride copolymer modified polyvinylidene fluoride, 10-20 parts of polystyrene, 2-4 parts of nano silicon nitride, 3-6 parts of a boehmite / aluminum oxide and silicon dioxide composite material, 1-2 parts of a dispersing agent and 65-90 parts of a solvent, according to the lithium battery diaphragm coating provided by the invention, the wettability and absorptivity of a diaphragm to an electrolyte are remarkably improved, meanwhile, the lithium battery diaphragm coating also has excellent thermal stability, and the diaphragm can be effectively prevented from thermal shrinkage or melting under a high-temperature condition, so that the safety performance of a battery is remarkably enhanced.

The invention discloses a preparation method of a curing agent with biological self-healing capability, which comprises the following steps: preparing a bacillus pasteurii bacterial solution, preparing the bacillus pasteurii bacterial solution into an endophytic spore solution, immersing polyvinyl alcohol fibers into a sodium alginate / endophytic spore solution, taking out the polyvinyl alcohol fibers, immediately immersing the polyvinyl alcohol fibers into a calcium acetate solution, drying the polyvinyl alcohol fibers to obtain core fibers with a hydrogel coating, and curing the core fibers with the hydrogel coating to obtain the curing agent with biological self-healing capability. The preparation method comprises the following steps: taking magnesium phosphate cement as a raw material, immediately immersing the magnesium phosphate cement into a chloroform solution of a polystyrene and polylactic acid polymer blend, drying to obtain a coated microbial liquid, premixing urea and glucose, doping the premixed urea and glucose into the magnesium phosphate cement, uniformly stirring, adding the coated microbial liquid, and uniformly stirring to obtain the product. According to the invention, phosphate cement is adopted as the curing agent, has the advantages of high strength, short setting time, strong durability, low alkalinity, good biocompatibility and the like, and compared with the curing agent in the prior art, the curing agent not only has a good curing effect, but also has a crack self-healing function, and is especially suitable for reinforcing foundation soil.

The invention belongs to the technical field of cement manufacturing, and particularly relates to high-strength weather-resistant environment-friendly cement and a preparation method thereof. The environment-friendly cement is prepared from the following raw materials in parts by mass: 40 to 55 parts of Portland cement, 15 to 25 parts of fly ash, 10 to 15 parts of slag powder, 6 to 12 parts of biomass reinforced composite mineral material, 2 to 4 parts of nano silicon dioxide, 1 to 4 parts of modified polymer emulsion and 1 to 3 parts of additive. The biomass reinforced composite mineral material is prepared from zeolite, bentonite, sepiolite and chitosan; the modified polymer emulsion comprises a modified polyacrylate emulsion and a modified polystyrene-butadiene emulsion in a mass ratio of (1-3): 1; the additive is prepared from basalt fiber, sodium lignin sulfonate, a rosin thermopolymer and sodium gluconate. The environment-friendly cement prepared by the invention not only has high strength and good weather resistance, but also remarkably reduces carbon footprint and saves natural resources.

The invention discloses a single-ion conductor polymer, a ternary composite binder solution, high-solid-content sulfide electrolyte slurry and a wet film forming method and application thereof, and belongs to the technical field of all-solid-state lithium batteries. The key technical problems in the wet membrane preparation of the sulfide electrolyte are solved through an innovative solvent-binder synergistic system, and the method specifically comprises the steps that 1, through the synergistic effect of a non-polar solvent and a weak-polar solvent, low-viscosity coating of high-solid-content slurry is achieved while the chemical stability of the sulfide electrolyte is guaranteed; 2, a poly (lithium styrenesulfonate-butyl acrylate), styrene butadiene rubber and polyisobutene ternary composite binder is designed, a lithium ion transmission channel is provided through a lithium sulfonate group, a benzene ring structure in the styrene butadiene rubber enhances the mechanical strength, long-chain alkane in the polyisobutene improves the interface adhesive force, and the mechanical strength is improved; the three components cooperate to realize balance of mechanical and electrochemical properties of the electrolyte membrane, so that the prepared electrolyte membrane has low porosity, high ionic conductivity and mechanical strength.

The invention relates to the technical field of petrochemical engineering, and discloses a temperature-resistant anti-swelling agent for fracturing and a preparation process thereof.The preparation method comprises the steps that glycerol triglycidyl ether and diethanol amine are subjected to a ring-opening reaction, a polyhydroxy tertiary amine monomer is obtained, then the polyhydroxy tertiary amine monomer and chloromethylated polystyrene are subjected to a quaternization reaction, and the temperature-resistant anti-swelling agent for fracturing is obtained. Quaternary ammonium salt groups of the anti-swelling agent and negative charges on the surface of clay form electrostatic interaction, and hydroxyl groups and the surface of the clay form hydrogen-bond interaction, so that the anti-swelling agent can be firmly adsorbed on the surface of the clay to form a layer of polymer film, the clay is prevented from being in contact with water, the phenomenon that the clay swells when encountering water is effectively inhibited, and the anti-swelling rate is very high. And the anti-swelling agent contains a heat-resistant polystyrene molecular chain, has excellent high temperature resistance, can maintain good structural stability at high temperature, still maintains high anti-swelling rate, and is suitable for a fracturing fluid system for high-temperature oil reservoir exploitation.

The present invention provides a polyphenylene sulfide resin and a method for preparing the same, the polyphenylene sulfide resin being obtained by measurement based on gel permeation chromatography using polystyrene as a conversion reference, in a differential molecular weight distribution curve using the logarithm value ln (M) of the molecular weight M as the horizontal axis and dw / dln (M) obtained by differentiating the concentration percentage w by the logarithm value ln (M) of the molecular weight as the vertical axis, the ratio of the value obtained by integrating dw / dln (M) at 6.90 < = ln (M) < = 9.21 with respect to the value obtained by integrating dw / dln (M) over the entire range of ln (M) is less than 5%. The preparation method of the polyphenylene sulfide resin is characterized in that a sulfur source, an alkali metal hydroxide and a dihalo aromatic compound are used as raw materials and subjected to a polymerization reaction in an organic polar solvent, and when the conversion rate of the dihalo aromatic compound is larger than 50%, materials passing through an external circulation pipeline are in a turbulent flow state so as to strengthen the mixing effect of a polymerization system; the polyphenylene sulfide resin can be prepared with high yield by inhibiting the generation of oligomer ultrafine powder waste. The method provided by the invention can significantly reduce the generation amount of oligomer ultra-micro powdery waste in the polyphenylene sulfide polymerization process.

The invention relates to the technical field of drilling fluid cooling, and discloses a phase change microcapsule suitable for drilling fluid cooling and a preparation method thereof.The phase change microcapsule comprises a capsule wall stabilizing material and a capsule core phase change material, and the capsule wall stabilizing material comprises polyurethane, polyurea, polyamide, polyimide, polystyrene and a first organic solvent; the capsule core phase change material comprises paraffin, fatty acid, polyol, inorganic hydrated salt, polymer gel, expanded graphite, carbon nanotubes, metal nanoparticles and a second organic solvent, and the first organic solvent is at least one of toluene, xylene, cyclohexanone and the like. The temperature of the drilling fluid is kept at a relatively low level, the cooling of the drilling fluid is realized, so that the drilling efficiency is improved, harmful solvents and additives are not used in the preparation process of the phase-change microcapsules, the phase-change microcapsules are pollution-free to the environment, and the requirements of greenness and environmental protection are met.

The invention discloses a high-strength low-density proppant as well as a preparation method and an in-situ generation method thereof. The proppant is prepared by compounding recycled glass fiber reinforced plastic powder or glass fiber powder with different meshes and recycled glass fiber reinforced plastic powder in different proportions and blending a styrene system / unsaturated polyester resin system in different proportions. The glass fiber reinforced plastic powder as the filler can improve the mechanical properties of the proppant, such as strength and toughness. The matrix is made of polystyrene or unsaturated polyester or other high polymer materials and is low in density. Therefore, the proppant has the characteristics of high strength and low density. The invention discloses a preparation method of a high-strength and low-density proppant, which can produce the high-strength and low-density proppant with uniform particle size distribution on a large scale by adopting a suspension polymerization method, and can efficiently recover a large amount of glass fiber reinforced plastic wastes. The suspension polymerization method is simple to operate, the produced proppant is high in roundness and sphericity, the mining cost of a coal-bed gas well can be reduced, and the yield of coal-bed gas can be increased.

The invention discloses nano-porous aerogel based on carboxymethyl chitosan as well as a preparation method and application of the nano-porous aerogel, and belongs to the technical field of biomass-based aerogel. The aerogel is prepared from the following raw materials in parts by weight: 2.5 parts of deionized water, 0.075 part of carboxymethyl chitosan (CMC), 0.0075 to 0.0225 part of carboxylated multi-walled carbon nanotubes (C-CNT), 0.01125 part of glutaraldehyde (GA), 0.01 part of poly (3, 4-ethylenedioxythiophene)-poly (styrene sulfonic acid) (PEDOT: PSS) and 10 parts of dimethyl sulfoxide (DMSO). According to the preparation method, CM C is used as a matrix, C-CNT is used as an internal conductive material and a strength enhancing material, hydrogel is formed under the action of a cross-linking agent GA, and CMC / C-CNT aerogel is prepared through directional freeze drying; cMC / C-CNT is taken as a substrate, then PEDOT: PSS is dip-coated to obtain CMC / C-CNT / PEDOT: PSS, the CMC / C-CNT / PEDOT: PSS is taken as an external conductive substance, the CMC / C-CNT / PEDOT: PSS and internal C-CNT form a double-conductive network, aerogel with excellent conductive performance and mechanical performance is prepared, the prepared aerogel is used for preparing an aerogel sensor, and the prepared sensor has high mechanical performance and high electrical performance.

The invention relates to the technical field of logistics packaging, and discloses a size-adaptive packaging device for logistics packaging, which comprises a mounting base, an article packaging box and an article to be packaged, trundles are arranged at four corners of the bottom of the mounting base, and a packaging box conveying mechanism capable of conveying the article packaging box is arranged at the top of the mounting base. An article conveying mechanism capable of conveying articles to be packaged is arranged, and a packaging box detection mechanism capable of detecting the internal volume of an article packaging box is arranged on the packaging box conveying mechanism. According to the size-adaptive packaging device and method for logistics packaging, the two sets of conveying mechanisms are arranged to convey packaging boxes and objects correspondingly, in the packaging box and object conveying process, the internal volumes of the packaging boxes are detected through the packaging box detection mechanism, and the volumes of the objects are detected through the object detection mechanism; and the programmable controller can be used for calculating the injection amount of the polystyrene foam according to detection data.

The invention discloses injection molding equipment for an EPS foam box, and relates to the technical field of injection molding equipment, the injection molding equipment comprises a machining base, a lower mold is fixedly arranged on the machining base, a mounting frame is fixedly arranged on the machining base, and an upper mold is slidably arranged on the mounting frame; and an electric push rod for driving the upper mold to move up and down is fixedly arranged on the mounting frame, an ejector plate is slidably arranged in the lower mold, and an ejector rod is slidably arranged in the machining base in a penetrating mode. According to the injection molding equipment for the EPS foam box, through the arrangement of a transmission connecting assembly, after injection molding of the foam box, a transmission pressing rod is driven to synchronously move upwards along with upward movement of an upper mold, and under the negative pressure condition in a transmission frame, a rack plate is driven to drive a transmission gear to rotate, so that a transmission disc is driven to rotate; and the ejector plate is driven to push the formed foam box to move out of the lower mold, and demolding operation is completed.

The invention provides syndiotactic polystyrene resin and a preparation method thereof, a resin composition and a product, the weight-average molecular weight of the syndiotactic polystyrene resin is 1.4 * 10 < 5 > g / mol to 2.2 * 10 < 5 > g / mol, the proportion of the syndiotactic polystyrene resin with the molecular weight larger than 3 times of the weight-average molecular weight is smaller than or equal to 10 wt%, and the proportion of the syndiotactic polystyrene resin with the molecular weight smaller than 0.2 times of the weight-average molecular weight is smaller than or equal to 6 wt%; the supercooling degree delta T of the syndiotactic polystyrene resin is 28 DEG C to 34 DEG C. According to the invention, the weight-average molecular weight of the syndiotactic polystyrene resin, the proportion of the high-molecular-weight syndiotactic polystyrene resin and the proportion of the low-molecular-weight syndiotactic polystyrene resin are controlled in a specific range, and the degree of supercooling is controlled in a specific range; the obtained syndiotactic polystyrene resin has excellent toughness and long-term dimensional stability after demolding.

The invention discloses lactobacillus plantarum capable of relieving enteritis and toxicity of polystyrene nano-plastics, and the preservation number of the lactobacillus plantarum is CGMCC (China General Microbiological Culture Collection Center) NO.31420. The lactobacillus plantarum can be used for relieving enteritis and toxicity of polystyrene nano-plastics. The strain is obtained by separating and purifying baby feces, and can grow on an MRS culture medium, and the bacterial colony is round, off-white, smooth and opaque. Experiments show that the lactobacillus plantarum can effectively adsorb PS-NPs, promote the PS-NPs to be discharged along with excrement, reduce accumulation of the PS-NPs in organs, and significantly reduce toxicity and inflammatory response of organs such as liver and kidney of mice. In addition, the strain can repair the intestinal barrier function, regulate liver metabolism and relieve enteritis symptoms. The invention further provides a probiotic preparation containing the strain, and the probiotic preparation can be prepared into granules, capsules, tablets or oral liquid and the like and is used for preventing or treating intestinal injury and inflammatory diseases caused by PS-NPs. The strain is safe and efficient, and has a wide application prospect.

The invention belongs to the technical field of environmental protection, and provides a preparation method of an imine-modified functionalized mesoporous magnetic silicon dioxide nano material. The method comprises the following steps: synthesizing Fe3O4 magnetic nanoparticles in a Fe < 2 + > / Fe < 3 + > alkaline hydrolysis system through a coprecipitation method; then coating the magnetic nanoparticles with an amorphous silicon dioxide layer by taking TEOS (tetraethoxysilane) as a silicon source by adopting a sol-gel method, so as to prepare magnetic silicon coated nanoparticles; the prepared nano-particles are subjected to secondary silicon coating guided by a cetyl trimethyl ammonium bromide (CTAB) mesoporous template agent, and mesoporous magnetic silicon nano-particles are formed after calcination; and finally, carrying out surface amination modification on the mesoporous magnetic silicon nano-particles by utilizing an amino silane coupling agent, and then carrying out condensation reaction on the mesoporous magnetic silicon nano-particles and various aldehyde derivatives to construct imine bonds, so as to obtain the imine-modified functionalized mesoporous magnetic silicon dioxide nano-material. The imine-modified functionalized mesoporous magnetic silicon dioxide nano-material formed by the invention has the characteristics of efficient adsorption, rapid magnetic recovery and excellent environmental stability, and can effectively remove polystyrene micro-plastics and organic pollutants in a water body.

The invention belongs to the technical field of packaging adhesive films for photovoltaic modules, and particularly relates to a water-blocking and oxygen-blocking adhesive film for photovoltaic module packaging and a preparation method of the water-blocking and oxygen-blocking adhesive film for photovoltaic module packaging, and the water-blocking and oxygen-blocking adhesive film comprises a water-blocking layer and an oxygen-blocking layer which are adjacent to each other through co-extrusion; wherein the waterproof layer is prepared from the following materials in parts by mass: 100 parts of grafted polyolefin resin, 0.05 to 0.5 part of alkaline nano oxide and 0.1 to 1 part of antioxidant; the oxygen barrier layer is prepared from the following materials in parts by mass: 100 parts of oxygen barrier resin, 0.1-1 part of an oxygen absorbent, 0.1-1 part of a silane coupling agent and 0.05-0.5 part of a light conversion agent; the oxygen-resistant resin comprises any one or a combination of more of PS (polystyrene), PE (polyethylene), PET (polyethylene terephthalate), PB (polybutylene), PP (polypropylene), PVC (polyvinyl chloride), PVDC (polyvinyl dichloride), PA6 (polyamide 6) and EVOH (ethylene-vinyl alcohol).

The invention provides a preparation method and application of a polystyrene resin-based spherical carbonaceous porous material, and belongs to the technical field of new energy materials. The method comprises the following steps: firstly, pre-mixing styrene with a cross-linking agent, a pore-forming agent, an initiator and a surfactant at a first preset temperature, then continuously stirring at a first preset stirring speed at a second preset temperature for a first preset time, and carrying out organic polymerization to prepare a polystyrene-based resin microsphere emulsion; then separating and drying the emulsion to obtain polystyrene-based resin microspheres; then oxidizing for a second preset time at a third preset temperature in an air atmosphere to prepare oxidized polystyrene-based resin microspheres; and finally, oxidizing at a fourth preset temperature for a third preset time to prepare the polystyrene resin-based spherical carbonaceous porous material. The method is simple in process and easy to implement, the preparation cost is effectively reduced while the yield is increased, and the method has wide application value and popularization prospects.

The invention discloses an energy-saving and environment-friendly polyarylate fabric whole-core flame-retardant conveying belt and a manufacturing method thereof. The energy-saving and environment-friendly polyarylate fabric whole-core flame-retardant conveying belt comprises a polyarylate fabric whole belt core, a covering layer and a belt core dipping sizing material, the covering layer comprises the following components: solution polymerized styrene-butadiene rubber, a styrene-butadiene-styrene block copolymer, a thermoplastic polyurethane elastomer, zinc oxide, stearic acid, sulfur, an accelerant, an anti-aging agent, carbon black, a hybrid flame-retardant composite material, a phosphate flame retardant, paraffin oil and an antistatic agent; the covering layer of the energy-saving and environment-friendly polyarylate fabric whole-core flame-retardant conveying belt prepared by the invention is compounded from white carbon black, expanded graphite, diethyl aluminum hypophosphite and dimethyl imidazole zinc, and is subjected to surface treatment through polyacrylamide; and then the styrene-butadiene-styrene block copolymer is used for carrying out macromolecular modification on the hybrid flame-retardant composite material, so that the prepared conveyor belt has excellent flame-retardant and antistatic properties, environment-friendly properties, low rolling resistance and mechanical properties.

The invention discloses a CNT-based antistatic MPPE composite material and a preparation method thereof, the composite material comprises the following raw materials by weight: 40-50 parts of modified polyphenyl ether, 40-50 parts of modified polystyrene, 10-15 parts of modified carbon nanotubes and 1-1.5 parts of zinc oxide, the modified carbon nanotubes are added into the composite filler, and the modified carbon nanotubes have a good conductive effect, so that the antistatic performance of the composite material is improved. And when the modified polyphenyl ether, the modified polystyrene, the modified carbon nanotubes and the zinc oxide are subjected to melt blending, under the action of the zinc oxide, the modified polyphenyl ether and the modified polystyrene are compounded and can be subjected to a DA reaction with maleimide on the modified carbon nanotubes to form dynamic crosslinking, so that the antistatic effect of the composite material is improved. Dynamic crosslinking can absorb and disperse energy when the composite material is impacted, and enables a molecular chain segment to generate greater motion when the composite material is impacted, so that deformation of the material is facilitated without breakage.

The invention provides a composite insulator with a cooling function and an embedded microcapsule hydrophobing agent and a preparation method of the composite insulator, and relates to the technical field of electric insulating materials. The composite insulator comprises an umbrella cover base material, the surface of the umbrella cover base material is provided with a cooling coating, and a microcapsule water repellent agent is embedded in the umbrella cover base material. The umbrella cover base material is silicone rubber or modified epoxy resin; the cooling coating is prepared from Al2O3 (at) TiO2 / PDA-BN, fluorocarbon resin, isopropanol, a dispersing agent and a flatting agent; the microcapsule water repellent agent is composed of a core layer and a shell layer, the core layer is made of fluorinated modified polystyrene / nano-silica microspheres, and the shell layer is made of polymer resin. The composite insulator has cooling and hydrophobic functions, the two functions are synergistic, the weather resistance of the insulator can be remarkably improved, the service life of the insulator in a severe environment is prolonged, and the defects that in the prior art, materials are fast in aging, poor in hydrophobic durability, single in function and the like are overcome.

The invention discloses a thermal insulation material with enhanced thermal insulation performance and a processing method, and relates to the technical field of thermal insulation material processing. Comprising the following components in parts by weight: 100 to 200 parts of a nanopore matrix material, 20 to 120 parts of expanded perlite, 10 to 350 parts of polystyrene, 30 to 300 parts of polyurethane, 100 to 500 parts of nano titanium dioxide, 10 to 60 parts of graphene, 10 to 40 parts of silica sol and 1 to 55 parts of ferric oxide. A multi-stage pore structure is constructed through a nanopore matrix and expanded perlite, closed-cell foam of polystyrene and polyurethane is combined, and nano titanium dioxide and graphene functional filler are matched, so that the heat conductivity coefficient is reduced to 0.018 W / (mK) or below, the heat insulation efficiency is remarkably improved, nanoscale homogenization is ensured through high-shear dispersion in the process, the porosity is reserved through freeze drying, and the heat insulation performance is greatly improved. The microcapsule self-repairing layer can repair more than 85% of cracks, the service life is greatly prolonged, and in the aspect of function integration, the material has A-level fireproof, waterproof and weather-proof characteristics and heat preservation and heat insulation performance.

A glass fiber-reinforced thermoplastic polymer composition has a sheathed continuous multifilament strand including a core that extends in the longitudinal direction and a polymer sheath which intimately surrounds the core, wherein the core has an impregnated continuous multifilament strand having at least one continuous glass multifilament strand, wherein the at least one continuous glass multifilament strand is impregnated with an impregnating agent, the polymer sheath is a thermoplastic polymer composition including a thermoplastic polymer, wherein the thermoplastic polymer contains a polyester having a weight average molecular weight of 15,000 to 80,000 Daltons as measured by gel permeation chromatography (GPC) using polystyrene standard and as measured by differential scanning calorimetry with a heating rate of 20° C. / minute on first heating according to ASTM D3418-08, at least one crystalline melting point (Tm) of 200 to 290° C.

The invention discloses an artificial SEI material and a preparation method thereof, an artificial SEI film and an artificial SEI film modified negative electrode. The artificial SEI material is an organic polymer brush (CNF-g-PSSX) prepared by grafting cellulose nanofibers with polystyrene sulfonate. The polymer brush is of a crystal structure and has a firm framework; and the side chain of polystyrene sulfonate has rich-SO3 functional groups which are matched with cations in sulfonate, so that a rapid ion transmission channel is provided, high-current-density circulation can be realized, and good interface contact is ensured. Due to a special molecular topological structure and a multi-component synergistic effect, when the organic polymer brush forms an artificial SEI film, high mechanical strength, high ionic conductivity and low interface impedance can be obtained at the same time, and through strong electrostatic repulsion between a negatively charged-SO3 group and the surface of a negatively charged lithium dendrite tip, the electrochemical performance of the artificial SEI film is improved. An obvious inhibition effect is shown on the continuous growth of dendritic crystals.

The invention provides a flame-retardant high-modulus polypropylene composite material and a preparation method thereof, and relates to the technical field of composites.The flame-retardant high-modulus polypropylene composite material comprises a matrix phase, and the matrix phase comprises, by weight, 50-60 parts of polypropylene, 30-40 parts of a phosphorus-nitrogen flame retardant, 3-5 parts of a compatilizer and 0.5-1.5 parts of a dispersing agent; wherein the matrix phase comprises the following components in parts by weight: 0.5 to 1.5 parts of a scratch-resistant agent and 0.1 to 0.5 part of an antioxidant, the dispersing agent is an imidized isobutylene-maleic anhydride copolymer, the compatilizer is a polystyrene-oxazoline graft polymer, and the matrix phase further comprises the following components in parts by weight: 0.5 to 1.5 parts of a scratch-resistant agent and 0.1 to 0.5 part of an antioxidant. The flame-retardant high-modulus polypropylene composite material disclosed by the invention can comprehensively improve the flame-retardant property and the scratch resistance of the flame-retardant high-modulus polypropylene composite material.

The invention provides a diaphragm and a preparation method thereof and a lithium ion battery, the diaphragm comprises a base membrane layer and a composite functional layer, the composite functional layer comprises hydrophobic SiO2 aerogel modified by a hydrophobic agent, a conductive ion polymer and a solid electrolyte, and the composite functional layer respectively accounts for 3-12wt%, 0.5-1.0 wt% and 0.5-1.5 wt% of the total mass of the diaphragm; the hydrophobic agent comprises trimethylchlorosilane, hexamethyldisilazane, perfluorooctyltriethoxysilane, polyvinylidene fluoride, polydimethylsiloxane and the like, the conductive ionic polymer comprises polyvinylpyrrolidone, lithium polymethacrylate, lithium polystyrene sulfonate, polyacrylamide and the like, and the solid electrolyte comprises lithium lanthanum titanium oxide, lithium lanthanum zirconium oxide, lithium lanthanum zirconium tantalum oxide and the like. The wettability is improved by the high porosity of the hydrophobic SiO2 aerogel, the stability and strong conductivity of a physical conductive network of the solid electrolyte and the ion affinity and amphoteric binding capacity of the conductive ion polymer are optimized, the electrochemical performance and thermal stability of the interface are optimized, and comprehensive optimization of the thermal-electric-interface performance of the diaphragm is realized through combination.

The invention relates to the field of foaming materials, in particular to a low-solvent-residue expandable polystyrene material and a preparation method thereof. The expandable polystyrene material with low solvent residue comprises the following raw materials in percentage by weight: 0.35-0.45% of a free radical initiation system, 0.35-0.45% of S, S, S, S, S, S, S, S, S, S, S, S, S, S, S According to the present invention, the material comprises, by weight, 0.1-0.15% of S, S '-bis (alpha, alpha'-dimethyl-alpha ''-acetoxy) trithiocarbonate, 0.15-0.2% of ascorbic acid, 0.1-0.2% of a nucleating agent, 0.2-0.3% of a suspending agent, 0.001-0.003% of an emulsifier, 5-6% of a foaming agent, 0.15-0.25% of a plasticizer, 0.001-0.002% of hydroxyethyl cellulose, 0.05% of sodium phosphate, 0.1-0.2% of zinc stearate, and 0.1-0.2% of glyceryl stearate, the obtained material has low solvent residue, meets food safety requirements, and is suitable for food packaging.

The invention provides an adsorbent capable of simultaneously adsorbing bilirubin and cytokines and a preparation method and application thereof, and the preparation method comprises the following steps: carrying out suspension polymerization reaction on a styrene monomer and a polyvinyl cross-linking agent in a dispersion medium under the action of a continuous multi-component pore-foaming agent and an initiator to prepare polystyrene-based macroporous resin; carrying out chloromethylation reaction on the polystyrene-based macroporous resin to prepare chlorine balls; carrying out post-crosslinking reaction on the chloromethylated beads to prepare the adsorbent capable of adsorbing bilirubin and cytokines at the same time; the continuous multi-component pore-foaming agent comprises a first pore-foaming agent, a second pore-foaming agent and a third pore-foaming agent of which the solubility parameters are gradually increased in sequence; the temperature of the suspension polymerization reaction is adjusted according to the mass fraction of the polyvinyl cross-linking agent in the monomer mixture and the solubility parameter of the continuous multi-component pore-foaming agent, and the monomer mixture is composed of styrene monomers and the polyvinyl cross-linking agent. The bilirubin and cell factors can be adsorbed at the same time, and the safety of blood purification is improved.

The invention discloses a method for synthesizing electronic-grade ethyl acetate through catalytic esterification of acidic ion exchange resin, and belongs to the technical field of ethyl acetate preparation. The method comprises the following steps: mixing crosslinked polystyrene white balls and a swelling agent, and dropwise adding concentrated sulfuric acid for reaction to obtain S-PS resin; mixing an EDTA disodium salt saturated solution and a polyacrylic acid solution, adding a cross-linking agent and an emulsifier, and carrying out a cross-linking curing reaction to obtain EDTA microcapsules; the preparation method comprises the following steps: dispersing S-PS resin in a solvent, adding EDTA microcapsules, a dehydration condensation agent and a catalyst, reacting under the protection of inert gas, and filtering and recovering after the reaction is finished to obtain S-PS-EDTA resin; mixing glacial acetic acid, absolute ethyl alcohol and S-PS (at) EDTA resin for reaction, and filtering and collecting liquid after the reaction is finished; and rectifying the collected liquid to obtain the product. According to the method provided by the invention, metal impurities can be chelated in the synthesis process, and the electronic-grade ethyl acetate with high purity and low impurity content is produced.

The invention discloses a micro-plastic integrated intelligent detection device, which comprises: a sample pretreatment module, which comprises a sample mixing module, a filtering separation module, an enrichment concentration module and a surface modification and marking module which are communicated in sequence and is used for mixing, filtering, enriching, modifying and marking a sample in sequence; the immunoreaction module is used for performing immunoreaction on the sample and the anti-polystyrene monoclonal antibody freeze-dried product marked by the quantum dot fluorescent microspheres; the fluorescence detection module is used for carrying out fluorescence detection on the test strip subjected to the immune reaction; the automatic control module is electrically connected with the sample pretreatment module, the immunoreaction module and the fluorescence detection module and is used for controlling the operation of each module. According to the invention, the sample processing module, the reaction module, the detection module and the control module are in close cooperation, the sample enters each module in sequence after simple pretreatment, detection and result output are semi-automatically completed, frequent manual operation of different instruments is not needed, the operation steps and time are reduced, and the operation difficulty is reduced.