7154 results about "Glycol synthesis" patented technology

The invention belongs to the technical field of polyester recycling, and relates to a method for efficiently producing terephthalate by depolymerizing waste polyester through carbonic ester, which comprises the following steps: depolymerizing waste polyester, carbonic ester and a catalyst under the protection of nitrogen or inert gas and solvent-free conditions, a is more than one of zinc acetate, sodium acetate, potassium chloride, lithium chloride, potassium carbonate, sodium carbonate, ethylene glycol antimony, antimony trioxide, antimony acetate, ethylene glycol titanium and titanium dioxide, and B is sodium ethoxide. The method solves the problems of limited conversion of the waste polyester chemical recovery monomer and long production process in the prior art, obviously improves the catalytic efficiency and the depolymerization speed through the compound catalyst, simplifies the depolymerization process, reduces the energy consumption, and is beneficial to industrial application.

One aspect is a method for producing a first intermediate product. A feedstock is provided that comprises a first polyester. The feedstock is contacted with a first amount of a first organic compound in a volume section V1 to obtain a first initial mixture. The first amount is in the form of a liquid. The first polyester is transported, and at least a fraction of the first amount of the first organic compound, from the volume section V1 to a volume section V2. The volume section V2 is at least partially filled with the first organic compound. A level of the first organic compound in the volume section V1 is at a height H1 from a floor, and a level of the first organic compound in the volume section V2 is at a height H2 from the floor. The first polyester is contacted with a further organic compound in a volume section V3, to obtain a further initial mixture. A weight average molar mass of the first polyester is reduced in the volume section V3, to obtain a first intermediate mixture. The first intermediate mixture comprisesa first intermediate product,the further organic compound.H1<H2.

The invention belongs to the field of intelligent soft materials, and discloses conductive eutectic gel with self-adhesion, wide-temperature strain sensing and high sensitivity as well as a preparation method and application of the conductive eutectic gel. The eutectic gel is prepared from polydopamine, polyvinyl alcohol, a polymer monomer, a eutectic conductive agent (which is prepared by adding ethylene glycol and a conductive agent into a polyvinyl alcohol solution and stirring), a cross-linking agent, an initiator and water. Strain sensing related tests prove that the gel has excellent sensitivity and strain sensing performance, and has application potential in the fields of high and low temperature severe environment monitoring, human health monitoring and motion monitoring.

The invention discloses a multistage fire-fighting and intelligent heat management combined system and method for an energy storage system, a battery cluster is provided with a single fire extinguishing nozzle, a composite detector monitors the state of the battery cluster in real time, and when any battery cluster meets a spraying condition, the fire extinguishing nozzle is triggered to spray a fire extinguishing material; the internal state of the energy storage cabin is monitored in real time through a composite detector, and when the interior of the energy storage cabin meets the spraying condition, a spraying nozzle is automatically started to continuously spray for preset spraying time; according to the centralized liquid cooling unit, a dual-redundancy compressor is combined with an ethylene glycol aqueous solution circulating system to conduct dynamic flow regulation and control, the opening degree of an electromagnetic valve of the dual-redundancy compressor is dynamically adjusted through a composite detector, and the internal temperature of an energy storage cabin is controlled; dynamically distributing flow according to the energy storage time period by adopting an intelligent temperature control algorithm; after the multi-stage fire-fighting module acts, the centralized liquid cooling unit is started for cooling; when the temperature detected by the composite detector exceeds a high-temperature threshold value, the fan is started for air replacement, and the multi-stage fire-fighting module is triggered to act.

A process for chemically recycling waste polyethylene terephthalate (PET) carpet fibers. The process comprises providing a waste carpet fiber composition comprising at least 75 wt % of PET and 6 wt % or less of ash; reacting the waste carpet fiber composition with methanol to produce a depolymerized poly ester mixture comprising polyester oligomers, dimethyl terephthalate (DMT), and ethylene glycol (EG); and recovering the DMT and the EG from the depolymerized polyester mixture.

The invention relates to the technical field of polyester fibers, in particular to a high-strength wear-resistant polyester fiber and a preparation method thereof. The invention aims to solve the problem that the mechanical strength and wear resistance of the existing polyester fiber are difficult to consider at the same time. The preparation method comprises the following steps: carrying out esterification and polycondensation on terephthalic acid, ethylene glycol, hydroxyl-terminated polydimethylsiloxane and isophthalic acid to obtain modified PET; the preparation method comprises the following steps: respectively carrying out oxidation treatment on graphene and a multi-walled carbon nanotube, and then adding polyether amine for grafting; carrying out melt blending with PET slices to obtain nano master batches; carrying out melt blending on the chopped glass fibers and the PET slices to prepare micron master batches; and mixing the modified PET, the nano master batch and the micron master batch, carrying out ultrasonic dispersion, adding an auxiliary agent, and carrying out melt spinning, three-section stretching and three-section heat setting treatment to obtain the high-strength wear-resistant polyester fiber. Through the synergistic effect of the components and the process, the prepared fiber has excellent mechanical properties and wear resistance, and has wide application prospects in the fields of clothing, home textiles, industry and the like.

The invention discloses an alkaline battery capable of improving low-temperature discharge performance and a preparation method thereof, and the preparation method comprises the following steps: S1, preparing a positive electrode ring: preparing a positive electrode material from metal-doped composite manganese dioxide, an adhesive and a potassium hydroxide solution; s2, preparing negative electrode zinc paste, mixing and ball-milling nano zinc powder, indium powder and gallium powder into alloyed zinc powder, adding a composite conductive additive, a composite binder and a low-temperature-resistant additive, and stirring and dispersing to form the negative electrode zinc paste; s3, sleeving the positive electrode ring into the steel shell, inserting a diaphragm and injecting electrolyte; and S4, injecting negative electrode zinc paste, and packaging to obtain a finished product. According to the negative electrode zinc paste, the zinc utilization rate can be increased through nano zinc powder alloying, meanwhile, the freezing point is reduced through the low-temperature-resistant additive, and the reaction efficiency and fluidity of the negative electrode zinc paste at the low temperature are improved; ethylene glycol in the electrolyte is combined with nano zirconium dioxide, so that the stability and the ion migration capability can be improved, the discharge performance of the alkaline battery under a low-temperature working condition is improved, and the service life of the alkaline battery under the low-temperature working condition is prolonged.

The invention discloses a uniform carbon-coated lithium iron phosphate positive electrode material and a preparation method thereof, and relates to the technical field of lithium iron phosphate positive electrode materials, the uniform carbon-coated lithium iron phosphate positive electrode material comprises lithium iron phosphate matrix particles, the lithium iron phosphate matrix particles are coated with a composite carbon layer, and the composite carbon layer is doped with cerium modified tantalum carbide nanocrystals; the preparation method of the cerium modified tantalum carbide nanocrystal comprises the following steps: dissolving pentaethoxy tantalum and cerous nitrate in ethylene glycol, adding urea as a precipitator, and synthesizing a Ta-Ce-O precursor through a microwave-assisted solvothermal method; the Ta-Ce-O precursor and phenolic resin are mixed and then subjected to ball milling and sintering, and the cerium modified tantalum carbide nanocrystal is obtained. By introducing a small amount of cerium modified tantalum carbide nanocrystals into the composite carbon layer for many times, uniform coating of the composite carbon layer can be realized, and the electrochemical performance of the lithium iron phosphate positive electrode material is enhanced.

The invention relates to a method for purifying a monomer bis (2-hydroxyethyl) terephthalate (BHET) obtained by depolymerizing waste polyester through ethylene glycol (EG), and belongs to the technical field of polyester recycling. The BHET microwave radiation induced film evaporation separation and molecular distillation refining continuous process provided by the invention solves the problems of long process flow, poor continuity, more side reactions and low purity and yield in the direct separation and refining process of BHET in alcoholysis liquid based on a gas-liquid equilibrium separation method at present. The whole technological parameter requirement is mild, the process is short, continuity is good, the BHET purity of the product is larger than or equal to 99.0 wt%, the hue is good, and the BHET yield is larger than or equal to 80.0%. And meanwhile, the method has the advantages that EG is conveniently recycled in a system, the production process is cleaner and more environment-friendly, and the comprehensive efficiency advantage is obvious.

The invention relates to the technical field of high-performance polyester, in particular to a high-strength low-shrinkage polyester fiber and a preparation method thereof. The defects that existing polyester fibers are poor in strength and shrinkage resistance are overcome. The preparation method comprises the following steps: mixing the modified resin, the modified nano silicon dioxide, the composite antioxidant, the composite nucleating agent and the composite lubricant, and carrying out melt spinning. Wherein the modified resin is prepared from the following raw materials: dimethyl terephthalate, isophthalic acid, ethylene glycol and isosorbide; the modified nano silicon dioxide comprises nano silicon dioxide, KH570 and silver nitrate; the composite antioxidant comprises an antioxidant 1010, an antioxidant 168 and an antioxidant 1222; the composite nucleating agent comprises sodium benzoate and nano montmorillonite; the composite lubricant is prepared from ethylene bis stearamide and pentaerythritol stearate. The prepared polyester fiber is high in strength, high in shrinkage resistance and suitable for manufacturing of outdoor equipment.

The invention discloses thermosetting unsaturated polyester resin as well as a preparation method and application thereof, and belongs to the technical field of unsaturated polyester resin. The raw materials comprise the following components in parts by weight: 270 to 380 parts of neopentyl glycol, 90 to 150 parts of ethylene glycol, 400 to 570 parts of isophthalic acid, 0.4 to 1.0 part of an antioxidant, 0.3 to 0.8 part of a catalyst, 80 to 170 parts of propylene glycol, 260 to 380 parts of maleic anhydride, 0.03 to 0.09 part of a first polymerization inhibitor, 0.1 to 0.3 part of a second polymerization inhibitor, 0.1 to 0.4 part of a third polymerization inhibitor and 800 to 900 parts of styrene. The thermosetting unsaturated polyester resin disclosed by the invention has relatively high mechanical properties and corrosion resistance after being cured, still can keep relatively high mechanical properties after being corroded by acid and alkali, is high in bending deformation resistance, and can be applied to thermosetting trenchless repair of buildings or pipelines.

The invention discloses preparation and application of a block cationic copolymer / quaternary ammonium salt chitosan-based composite hydrogel. The preparation method comprises the following steps: reacting a sodium alginate solution with a NaIO4 solution at room temperature in a dark place to obtain an oxidized sodium alginate solution; adding ethylene glycol into the oxidized sodium alginate solution, reacting, concentrating, dialyzing and drying to obtain oxidized sodium alginate; the preparation method comprises the following steps: mixing acrylamide, 1-butyl-3-vinyl imidazole ammonium bromide, 3-acrylamide phenylboronic acid and quaternary ammonium salt chitosan, dissolving in water, adding ammonium persulfate and N, N-methylene bisacrylamide, heating for reaction, and cooling to obtain a cooling liquid; adding the oxidized sodium alginate solution into the cooling liquid, continuously adding polymerized N, N, N ', N'-tetramethylethylenediamine, reacting and curing to obtain composite hydrogel; and soaking the composite hydrogel in a glycerin / water mixed solution to obtain the composite hydrogel. When the composite hydrogel is used as a wound dressing, the composite hydrogel has the characteristics of good antibacterial activity, high sterilization efficiency, good anti-freezing and anti-drying performance and difficulty in generating drug resistance.

The invention relates to the technical field of biological extraction, in particular to a green synergistic extraction system and an extraction method and application thereof.The green synergistic extraction system comprises a deep eutectic solvent system, an enzymolysis system and an ultrasonic-assisted extraction system, and the deep eutectic solvent system comprises a DES solvent; the DES solvent is composed of a hydrogen bond acceptor and a hydrogen bond donor, and the hydrogen bond acceptor is choline, choline chloride or L-proline; the hydrogen bond donor is lactic acid, urea or ethylene glycol; enzyme preparations in the enzymolysis system are at least two of cellulase, pectinase and beta-glucosidase; the problems that a traditional organic solvent is high in toxicity and poor in biodegradability and synthetic deep eutectic solvent raw materials are non-renewable are solved, a green synergistic extraction system which is environmentally friendly, low in cost and excellent in performance is developed, the mass transfer efficiency and the extraction yield are improved, the used DES and enzyme preparations can be recycled, and the cost is reduced while the environment is protected.

The invention belongs to the technical field of recycled polyester, and particularly relates to a waste polyester textile recycling method which comprises the following steps: decolorizing colored waste polyester textiles by adopting a decolorizing agent which is more than one of dimethyl carbonate, diethyl carbonate and methyl ethyl carbonate; the depolymerization agent is adopted to depolymerize the decolored polyester textile to obtain the terephthalate, and the depolymerization rate of the decolored polyester textile is 98.0-100%; firstly, terephthalate is converted into DMT, and then DMT, ethylene glycol, a catalyst and a functional additive are subjected to a repolymerization reaction to obtain regenerated PET. According to the method, a process of decoloring and depolymerizing sequentially is adopted, and decoloring and depolymerizing are coordinated, so that the process is simplified, the energy consumption and pollution are reduced, and the economical efficiency and sustainability of waste polyester textile recycling are improved.

The invention relates to a method for preparing methanol based on carbon dioxide capture, and a method for preparing ethylene glycol and environment-friendly polyester. The method comprises the following steps: capturing and purifying a byproduct high-concentration carbon dioxide gas flow in a petroleum refining process into high-purity carbon dioxide, and sequentially carrying out hydrogenation reaction and preparation of green methanol in three stages of fixed bed reactors, a copper-zinc-calcium-magnesium-aluminum hydrogenation catalyst is adopted in the first-stage reactor and the third-stage reactor, and the copper-zinc-calcium-magnesium-aluminum hydrogenation catalyst is adopted in the second-stage reactor and the third-stage reactor. And a copper-zirconium-titanium-vanadium deposition type hydrogenation catalyst is adopted in the second-stage reactor. The green ethylene glycol can be prepared from the green methanol through an MTO process, ethylene oxidation and ethylene oxide hydrolysis. The environment-friendly carbon-reducing polyester can be prepared from the green ethylene glycol and terephthalic acid PTA through slurry preparation, esterification reaction and polymerization reaction; in the esterification and polymerization process, by adding a specific esterification catalyst and a compound stabilizer, the performance of the environment-friendly carbon-reducing polyester can be improved, and the performance of the environment-friendly carbon-reducing polyester is equivalent to that of a polyester product corresponding to petrochemical method ethylene glycol.

The invention belongs to the technical field of electrochemistry, and particularly relates to a negative electrode binder which is composed of a core layer and a shell layer, and the core layer is coated with the shell layer. In one negative electrode binder, a core layer monomer used for synthesizing a core layer comprises ethylene glycol phenyl ether unsaturated acid ester. In the other negative electrode binder, the diameter of the core layer is 50-500 nm, and the thickness of the shell layer is 1-10 nm; or the glass transition temperature of the shell layer is greater than the glass transition temperature of the core layer; or the swelling degree of the core layer in the electrolyte is 20%-200%, and the swelling degree of the shell layer in the electrolyte is 1%-10%. The negative electrode binders have good flexibility, dispersibility, mechanical modulus and bonding strength, are beneficial to inhibition of volume expansion generated by a negative electrode active material in the charging and discharging process, and are beneficial to maintenance of structural stability in the long cycle process, so that the cycle performance of the battery is improved.

The invention discloses a polyethylene glycol-poly (2-vinyl) ethylene glycol copolymer and a preparation method thereof, and relates to the technical field of high polymer materials, and the structure of the polyethylene glycol-poly (2-vinyl) ethylene glycol copolymer is selected from any one of the following structural formulas: # imgabs0. The preparation method comprises the following steps: taking hydroxyl-containing polyethylene glycol and 4-vinyl-1, 3-dioxocyclopent-2-ketone or vinyl ethylene oxide as raw materials; under the action of a palladium catalyst and a phosphine ligand, the polyethylene glycol-poly (2-vinyl) glycol copolymer is efficiently prepared and can be used in the fields of hydrophilic / hydrophobic materials, drug carriers, antibacterial materials, phase change materials, shape memory materials and the like.

The invention discloses a preparation method and application of a metal nitrogen-carbon loaded high-load platinum catalyst, and belongs to the field of four-electron oxygen reduction. The method comprises the following steps: firstly, dispersing a synthesized metal carrier in ethylene glycol, carrying out uniform ultrasonic treatment, dropwise adding a chloroplatinic acid solution, continuously carrying out uniform ultrasonic dispersion, dropwise adding sodium hydroxide until the pH value is 11, and stirring for 2 hours; reacting the reaction liquid in an oil bath at 125 DEG C for 3 hours, cooling to room temperature, adding hydrochloric acid to settle the reaction liquid, washing with a large amount of water, and drying in vacuum to obtain the target catalyst. According to the synthesis method, relatively environment-friendly solvents such as methanol and ethylene glycol are used, so that the pollution to the environment is reduced, the used raw materials are relatively cheap, the energy consumption in the preparation process is relatively low, and the production cost of the catalyst is favorably reduced. The prepared catalyst shows excellent oxygen reduction performance and has a good industrial prospect.

The invention discloses a preparation method of a spherical cerium-based abrasive material with high hardness and high Ce < 3 + > content. The method comprises the following steps: 1, carrying out hydrothermal reaction on cerium salt and aluminum salt in an ethylene glycol solution to generate a cerium-based abrasive precursor; 2, firing the cerium-based abrasive precursor to obtain a cerium oxide spherical abrasive doped with aluminum oxide; and 3, reducing the cerium oxide spherical abrasive by sodium borohydride to obtain the spherical cerium-based abrasive with high hardness and high Ce < 3 + > content. According to the method, aluminum ions are doped into the cerium oxide spherical abrasive through a one-step hydration method, the hardness of the abrasive is improved, meanwhile, a large amount of Ce < 4 + > is efficiently and rapidly reduced into Ce < 3 + > ions through an in-situ reduction method, and the polishing efficiency of the abrasive is improved. The cerium-based abrasive synthesized by the method is uniform in granularity, good in morphology, high in hardness and high in Ce < 3 + > content, and the polishing rate of silicon carbide can be remarkably increased and the surface roughness can be remarkably reduced when the cerium-based abrasive is prepared into a silicon carbide polishing solution; and the preparation method is simple, good in repeatability, green and environment-friendly, and beneficial to industrial production.

The preparation method of the antibacterial polyester fiber comprises the following steps: firstly, reacting a cationic antibacterial agent with a terminal carboxyl group with 4-sulfobenzoic acid monopotassium salt to obtain a high-temperature-resistant polymerizable cationic antibacterial agent; then taking purified terephthalic acid, a high-temperature-resistant polymerizable cationic antibacterial agent and ethylene glycol as raw materials, adding an auxiliary agent trimethyl phosphate and a catalyst to prepare uniform slurry, and adding the uniform slurry into an esterification reaction kettle; entering a polycondensation stage after esterification is finished, filling nitrogen after reaction is finished, pressurizing, discharging, and performing underwater granulation to obtain antibacterial polyester chips; then, the antibacterial polyester chips are dried until the water content is lower than 30 ppm, and the antibacterial polyester fibers are obtained through the melt extrusion spinning step; the fiber strength of the prepared antibacterial polyester fiber is larger than or equal to 2.8 cN / dtex, the antibacterial rate meets the AAA grade standard, and the antibacterial polyester fiber has good strength and is wide in application range.

The invention discloses injectable hydrogel for eye drug sustained release and a preparation method and application thereof.The method comprises the steps that a NaIO4 solution is dropwise added into a hyaluronic acid solution, after the reaction is conducted in a dark place at the room temperature, ethylene glycol is added for continuous reaction, and formylated hyaluronic acid is prepared; the preparation method comprises the following steps: adding adipic dihydrazide into a carboxymethyl cellulose solution, uniformly stirring at room temperature, adding 1-hydroxybenzotriazole and 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride, and stirring to react, so as to prepare aminated carboxymethyl cellulose; and mixing the PBS solution of aminated carboxymethyl cellulose with the PBS solution of formylated hyaluronic acid, uniformly stirring, adding a to-be-carried drug and a FeCl3 solution, and carrying out a reaction to prepare the injectable hydrogel for sustained release of the eye drug. The hydrogel is convenient to use and high in gelation rate, effectively realizes controllable release of drugs, and has a wide application prospect in the field of biological medicines.

The present invention relates to the technical field of flame-retardant and antibacterial polyester fibers, and discloses a nano zinc oxide modified flame-retardant and antibacterial polyester fiber and a preparation method thereof, wherein the raw materials of the polyester fiber include: purified terephthalic acid, ethylene glycol, nano zinc oxide-cellulose nanocrystals, an antioxidant and a catalyst; the addition amount of the nano zinc oxide-cellulose nanocrystals accounts for 5000-10000ppm of the mass of the polyester fiber. The present invention uses cellulose nanocrystals to modify the surface of zinc oxide, which can not only promote the carbonization of cellulose nanocrystals during the combustion process, thereby improving the flame retardant properties, but also improve the dispersibility and reinforcing effect in the polyester fiber, thereby making the fiber spinnable, and the polyester fiber can maintain good mechanical properties and hue while improving the flame retardant and antibacterial properties, thereby ultimately improving product quality and reducing costs.

The invention discloses a preparation method of a perovskite type high-temperature-resistant CO2 methanation catalyst, which comprises the following steps: firstly, preparing CaZrO3, then dissolving CaZrO3 powder, a nickel source, a soluble organic fuel and a certain amount of ethylene glycol in deionized water according to a molar ratio of 1: (0.2-0.8): (0.1-0.5), stirring to obtain a dispersion liquid, then putting carrier monoclinic ZrO2 powder in the dispersion liquid, and stirring to obtain the perovskite type high-temperature-resistant CO2 methanation catalyst. The preparation method comprises the following steps: uniformly mixing the raw materials, carrying out ultrasonic treatment for 5-12 hours, heating the obtained mixture at 300-550 DEG C until spontaneous combustion, carrying out high-temperature calcination at 800-900 DEG C for 1-2 hours after flame is extinguished, collecting the calcined product, and carrying out ball milling and granulation to obtain the NiO-CaZrO3 / ZrO2 catalyst with a certain mesh number. According to the preparation method of the catalyst, a solution combustion method is introduced in the preparation process, so that active components of the prepared catalyst are fully dispersed, and further high-temperature calcination is performed on the basis, so that the active components are stably anchored on the surface of the ZrO2 carrier, and the catalytic activity and the stability of the catalyst are improved.

The invention relates to the technical field of inorganic non-metallic materials, in particular to a quaternized cholic acid polyurethane modified polyvinyl chloride material, a preparation method and application. The quaternized cholic acid polyurethane polymer is based on a polyurethane elastomer developed by using cholic acid molecules with a rigid skeleton as a hard segment unit and flexible oligomeric ethylene glycol as a soft segment unit, hydroxyl on cholic acid polyurethane is quaternized to prepare cation modified cholic acid polyurethane, and the cation modified cholic acid polyurethane simulates amphiphilic characteristics of natural peptides. The quaternized cholic acid polyurethane is introduced into a polyvinyl chloride (PVC) matrix as an antibacterial agent, so that the growth of microorganisms such as bacteria and molds can be effectively inhibited, the antibacterial property is achieved, bacteria breeding on the inner surface of a pipeline is avoided, and the composite material is endowed with better biocompatibility and antibacterial property; meanwhile, the quaternized cholic acid polyurethane can effectively improve the strength and toughness of the PVC material; wide application prospects are realized.

The invention relates to the field of wear-resistant fabrics, and discloses a high-strength wear-resistant fabric and a preparation method thereof.The high-strength wear-resistant fabric comprises a surface coating and a base cloth layer, the surface coating and the base cloth layer are formed by coating and drying modified waterborne polyurethane emulsion, and the modified waterborne polyurethane emulsion comprises isophorone diisocyanate, ethylene glycol terephthalate, 2, 3, 4-trimethyl-1, 3-pentanediol monoisobutyrate, polyisobutylene glycol monoisobutyrate, according to the present invention, 2, 2-dimethylolpropionic acid, a modified additive, a flame retardant modifier, 1, 4-butanediol, trimethylolpropane and the like are adopted to prepare the modified additive, dopamine is subjected to in-situ auto-polymerization on the surface of a titanium dioxide nanotube, nano-silica is grown on the surface in situ, and modification is performed through a polysiloxane solution to prepare the modified titanium dioxide nanotube flame retardant; the polysiloxane solution is prepared by carrying out a reaction on methyl triethoxysilane and dihydroxyl-terminated polydimethylsiloxane; the flame-retardant modifier is prepared by reacting 2-chloro-4, 6-diamino-1, 3, 5-triazine, 5-hydroxymethylfurfural and phosphorous acid, so that the fabric is endowed with good mechanical properties and wear resistance, and the fabric has a hydrophobic surface and is excellent in flame retardance and durability.

The invention provides a coating for casting an alloy steel lost foam as well as a preparation method and application of the coating. The coating comprises the following raw materials in parts by weight: 79-89 parts of aggregate, 3-7 parts of a binder, 4-7 parts of a suspending agent, 1.5-3 parts of a surfactant, 1.5-2.5 parts of a defoaming agent and 1-1.5 parts of a preservative, the aggregate is prepared from the following components in percentage by mass: 78 to 82 weight percent of bauxite, 12 to 15 weight percent of mica and 3 to 10 weight percent of quartz powder; the binder is prepared from the following components in percentage by mass: 42 to 50 weight percent of anhydrous aluminum dihydrogen phosphate, 18 to 25 weight percent of white carbon black, 12 to 17 weight percent of ethylene glycol and 8 to 28 weight percent of magnesium oxide; the coating for casting the alloy steel evanescent mode keeps good suspension property, high-temperature air permeability, coating property, high-temperature crack resistance and shedding property of the coating, the surface of a casting is smooth and free of burnt-on sand, less harmful gas is volatilized during firing, and harmful gas generated by burning of a white mold can be absorbed.

The invention discloses a warm-keeping fabric containing hollow polyester fibers as well as a preparation method and application thereof, and relates to the field of fabrics. When the thermal fabric containing the hollow polyester fibers is prepared, hollow mesoporous nano cerium oxide is selectively protected by molten paraffin and then reacts with chloromethyl trimethoxy silane and isocyanuric acid in sequence, paraffin is dissolved by chloroform, and then N-(3-trimethoxysilylpropyl) pyrrole is grafted to obtain modified hollow mesoporous nano cerium oxide; reacting terephthalic acid, a multifunctional monomer and ethylene glycol to obtain modified polyester particles; the preparation method comprises the following steps: granulating modified polyester, uniformly mixing modified hollow mesoporous nano cerium oxide and polyethylene glycol 10000, performing melt spinning, treating with a pyrrole solution, twisting, spinning and weaving, and treating with a sodium hypochlorite mixed solution to obtain the thermal fabric containing the hollow polyester fibers. The warm-keeping fabric containing the hollow polyester fibers prepared by the invention has excellent warm-keeping, antibacterial, anti-aging, flame-retardant, antistatic and mechanical properties.

The invention discloses a method for preparing regenerated flame-retardant high-shrinkage polyester by a methanol alcoholysis method, and belongs to the technical field of polyester. The method comprises the following steps: (a) mixing the waste polyester fabric with methanol, and carrying out catalytic depolymerization to obtain a regenerated DMT mixed solution; (b) carrying out impurity separation and methanol recovery treatment on the regenerated DMT mixed solution, and then carrying out cooling crystallization, centrifugal drying and rectification purification treatment to obtain pure DMT; (c) carrying out transesterification on pure DMT, ethylene glycol, a transesterification catalyst and a DEG inhibitor; (d) after the ester exchange reaction, adding CEPPA-EG and IPA-EG for copolymerization; adding a polymerization catalyst, a stabilizer and an antioxidant for polymerization reaction to obtain a modified polyester melt; and (e) granulating and drying to obtain the slices. The regenerated polyester prepared by the method has multiple functions of flame retardance, high boiling water shrinkage, low-temperature dyeing and the like, and is suitable for the fields of high-end clothing, automotive trim, electronic packaging materials and the like.

The invention discloses a carbon-doped titanium dioxide nanotube-molybdenum disulfide energy-storage antibacterial material and a preparation method thereof. The preparation method comprises the following steps: carrying out primary anodic oxidation on a clean titanium foil in a mixed electrolyte of ethylene glycol, water and ammonium fluoride; after ultrasonic treatment is carried out in a hydrochloric acid solution for set time, secondary anodic oxidation is carried out, and the mixed electrolyte of the secondary anodic oxidation is the same as that of the primary anodic oxidation; annealing the titanium foil subjected to anodic oxidation twice in an argon atmosphere, putting an annealed sample into a mixed solution of sodium molybdate, a sulfur source and glucose, and carrying out hydrothermal treatment; and the titanium foil subjected to hydro-thermal treatment is cleaned and dried, and the carbon-doped titanium dioxide titanium foil with the surface covered with molybdenum disulfide is obtained. The MoS2-coated carbon-doped titanium dioxide nanotube (TNT-C-atMoS2) with high biocompatibility developed by the invention has a synergistic effect of charge antibiosis and chemical sterilization, so that the problem of intractable biological fouling of a titanium-based metal material in ocean engineering equipment is effectively solved.

The invention belongs to the technical field of high polymer materials, and particularly relates to spinning-grade all-aryl polynaphthyl ester resin and a preparation method thereof. According to the invention, p-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid, aromatic dicarboxylic acid and ethylene glycol monomer are adopted as raw materials, polymerization reaction is carried out under the action of the catalyst, spinning-grade all-aryl polynaphthyl ester resin is successfully obtained under specific reaction conditions, and the spinning-grade all-aryl polynaphthyl ester resin has high molecular weight, low impurity content and good heat resistance, and can be used for preparing the spinning-grade all-aryl polynaphthyl ester resin. The melt fluidity is good, the shear thinning phenomenon is more obvious, and the method can be directly used for preparing the polynaphthalene ester fiber.