45 results about "Dioctyl terephthalate" patented technology

The invention relates to the technical field of cables, in particular to an environment-friendly flame-retardant antioxidant chlorinated polyvinyl chloride cable and a preparation method thereof, and the environment-friendly flame-retardant antioxidant chlorinated polyvinyl chloride cable comprises the following raw materials: chlorinated polyvinyl chloride, dioctyl terephthalate, nano aluminum hydroxide, a composite flame retardant, a calcium-zinc stabilizer, epoxidized soybean oil and nano clay. The composite flame retardant forms an organic-inorganic synergistic core-shell structure on a micro-nano scale, hexaphenoxy cyclotriphosphazene provides a phosphorus source flame-retardant function, and polyborosilazane forms a boron-silicon-nitrogen ceramic network after heat treatment, so that the carbon layer stability and thermal oxidation resistance of the material are effectively improved; meanwhile, the modified silicon dioxide is used as an inorganic skeleton reinforcing phase, so that the dispersity and the interface bonding performance of the flame retardant in a CPVC matrix are improved; through the synergistic effect, the flame retardant efficiency, thermal stability and mechanical strength of the cable material are remarkably improved, and smoke release and toxicity are reduced.

The invention belongs to the technical field of wastewater treatment equipment, and particularly relates to wastewater extraction equipment for producing dioctyl terephthalate, which comprises a main body, and the main body is internally divided into a flocculation zone, an anaerobic zone, an aerobic zone and a settling zone; sludge discharge plates are mounted on the bottom surfaces of the flocculation area and the sedimentation area, the upper surfaces of the sludge discharge plates are obliquely arranged, and cavities are formed in the sludge discharge plates and connected with air inlet control pipes; a mounting baffle is mounted in the flocculation area, magnetic blocks are symmetrically mounted on the mounting baffle, and a movable net is slidably mounted between the magnetic blocks; the lower end of the mounting baffle is not in contact with the bottom of the flocculation zone; the device is simple in structure, mixed wastewater is filtered and settled for multiple times, solid impurities in the wastewater are fully discharged, meanwhile, water flow is used for impacting and stirring from bottom to top, activated sludge is kept in a suspended state, uniformity and fluidity are improved, and the wastewater recycling effect is guaranteed to be improved.

The invention belongs to the technical field of carboxylic ester preparation, and particularly relates to a preparation method of dioctyl terephthalate, which comprises the following steps: under the catalysis of acid, modifying mesoporous silica by using OTES and a carbazole silane solution to obtain modified silica; under the protection of inert atmosphere, uniformly mixing TBT and methylbenzene, adding absolute ethyl alcohol for reaction, adding modified silicon dioxide for dispersion, adding water-containing mixed liquid for reaction, and aging, filtering, washing and drying to obtain the titanium-based catalyst. The preparation method comprises the following steps: uniformly mixing PTA, 2-ethylhexanol and a titanium-based catalyst, carrying out heating reaction, filtering, and carrying out reduced pressure distillation to obtain the dioctyl terephthalate. The method can inhibit hydrolysis failure of a titanium active center in the catalytic esterification reaction process, and improves the yield and purity of dioctyl terephthalate.

This application provides a flame-retardant and toughened cable material, prepared from the following components in parts by weight: 85-100 parts PVC resin, 15-20 parts dioctyl phthalate, 10-15 parts chlorinated paraffin, 10-15 parts dioctyl terephthalate, 40-50 parts heavy calcium carbonate, 5 parts stabilizer, 2-3 parts PE wax, 1-2 parts stearic acid, and 20-30 parts flame-retardant particles. The flame-retardant particles are composite microspheres formed by loading flame retardants onto nano-silica aerogel and grafting POSS onto its surface. Nano-silica aerogel has a higher temperature resistance limit, and its unique three-dimensional porous network structure can absorb heat and restrict oxygen diffusion. It can also load flame retardants, resulting in a more uniform distribution of the flame retardant. POSS acts as a bridge between the nano-silica aerogel and PVC resin, improving the compatibility and bonding strength between the flame-retardant particles and PVC resin, reducing stress concentration, and improving toughness, thus achieving simultaneous improvement in flame retardancy and toughness.

The invention discloses a sealant with bacteriostatic and mildew-proof functions for a metal bottle cap and a preparation method of the sealant, and belongs to the technical field of sealant preparation. The sealant provided by the invention is prepared from the following raw material components in percentage by mass: 40.0 to 55.0 percent of an auxiliary agent A, 0.5 to 3.0 percent of an auxiliary agent B, 2.0 to 4.0 percent of zinc stearate, 1.0 to 3.0 percent of titanium dioxide, 1.0 to 5.0 percent of ground calcium carbonate, 0.5 to 2.5 percent of an anti-blocking agent and 39.0 to 55.0 percent of polyvinyl chloride resin, the auxiliary agent A is prepared from at least two of dioctyl terephthalate, epoxidized soybean oil, trimellitic anhydride and cyclohexane 1, 2-diisononyl diformate; the auxiliary agent B is obtained by mixing and grinding zinc oxide, metal silver, zirconium phosphate, zinc pyrithione and coconut oil fatty acid diacetamide. According to the invention, the sealant is prepared by compounding multi-component food-grade antibacterial mildew-proof active components, so that the prepared sealant is ensured to reach the first-grade standard of ASTM G21-15 Determination of Antifungal Factor of Synthetic High Polymer Materials, meanwhile, the risk that the sealant is mildewed when being used in canned food is reduced, and the quality of the product is improved.

The invention relates to the technical field of recycled asphalt mixtures, and particularly discloses a recycled asphalt mixture with good durability and a preparation method thereof. The invention discloses a recycled asphalt mixture with good durability. The recycled asphalt mixture is prepared from 60-80 parts of a waste asphalt mixture reclaimed material, 4-7 parts of new asphalt, 15-18 parts of a new aggregate, 2-5 parts of fibers, 3-7 parts of a regenerant and 2-5 parts of filler, wherein the regenerant is prepared from aromatic hydrocarbon oil, triethylene glycol di-2-ethylhexoate, 2-ethylhexyl diphenyl phosphate, dioctyl terephthalate, epoxidized soybean oil, dipropylene glycol methyl ether acetate, polymethylene polyphenyl polyisocyanate, oleic acid hydroxyethyl imidazoline, 0 erucyl amide and barium petroleum sulfonate. The recycled asphalt mixture provided by the invention can effectively resist generation of diseases such as ruts and cracks, the service life of a road is remarkably prolonged, and the maintenance cost of the road is reduced.

The present application relates to the technical field of underwater curable sealant, in particular to an underwater curable polyurethane sealant and a preparation method thereof.An underwater curable polyurethane sealant comprises glue, dioctyl terephthalate, wetting dispersant, water removing agent, thixotropic agent, filler, magnesium fluoride, carbon black and ultraviolet absorber; wherein the glue comprises the following raw materials in mass fraction: polyoxyethyl polyoxypropyl glycerol ether, polypropylene glycol, bio-based polyol, isocyanate propyl triethoxy silane, diphenyl methane diisocyanate, drier, coupling agent, defoaming agent, diluent and latent curing agent.The underwater curable polyurethane sealant of the present application can not only be quickly cured underwater, but also can quickly form a stable bonding interface after being cured underwater, effectively resist the penetration of water molecules, thereby ensuring long-term sealing effect and structural stability.

The invention relates to the technical field of polyvinyl chloride materials, and discloses a lead and arsenic-free polyvinyl chloride sheath cable material and a preparation method thereof. The polyvinyl chloride sheathed cable material comprises the following raw material components in parts by weight: 100 parts of polyvinyl chloride resin powder, 40-45 parts of a plasticizer, 5-7 parts of a stabilizer, 10-15 parts of calcium carbonate, 10-15 parts of aluminum hydroxide, 2-4 parts of magnesium hydroxide, 0.5-2 parts of an anti-dripping agent and 0.2-1 part of a synergist, the stabilizer is folic acid modified Ca-Mg-Al-LDH (layered double hydroxide). The plasticizer is composed of dioctyl terephthalate and stearoyl chloride modified red phosphorus microcapsules. The prepared polyvinyl chloride sheathed cable material has good flame retardance and heat aging resistance.

This application relates to a tensile PVC film and its preparation method, comprising the following raw materials in parts by weight: 100-140 parts by weight of PVC resin, 35-55 parts by weight of dioctyl terephthalate, 3-8 parts by weight of dioctyl adipate, 3-6 parts by weight of zinc-calcium composite stabilizer, 4-6 parts by weight of β-hydroxyethyl acrylate / methylhexahydrophthalic anhydride modified epoxidized soybean oil, 15-25 parts by weight of hydrogenated ricinoleic acid modified nano-calcium carbonate, 8-12 parts by weight of heavy calcium carbonate, 3-5 parts by weight of titanium dioxide, and 0.01-0.03 parts by weight of colorant. This PVC film exhibits good tensile strength and elongation at break, with a longitudinal tensile strength >28.5 MPa, a transverse tensile strength >24 MPa, a longitudinal elongation at break >285%, and a transverse elongation at break >315%.

The invention relates to a full-continuous production process of dioctyl terephthalate, and belongs to the technical field of high-molecular compound synthesis processes. The invention discloses a full-continuous production process of dioctyl terephthalate, which comprises the following steps: by taking a three-stage gradient reaction device as an esterification tower, increasing the esterification rate by controlling gradient temperature and pressure, connecting an esterification separator to the top of the esterification tower, separating water vapor and alcohol vapor, cooling the vapor, and carrying out oil-water separation, and freezing and standing the separated octanol to flow back into the esterification tower, enabling the material reacted in the esterification tower to flow out from the bottom of the tower, introducing into a secondary distillation tower, carrying out reduced pressure distillation, cooling and dehydrating, and filtering to obtain a finished product.

The invention discloses a polyvinyl chloride modified material with high volume resistivity as well as a preparation method and application thereof, and belongs to the technical field of high polymer material preparation. The polyvinyl chloride modified material comprises the following raw materials: ethylene-process polyvinyl chloride resin powder, a polyester plasticizer, dioctyl terephthalate, epoxidized soybean oil, a polystyrene thermoplastic elastomer, a grafting material, argil, calcium powder master batch, a calcium-zinc stabilizer, PE wax and calcium stearate. By selecting ethylene-process PVC and a high-molecular-weight polyester plasticizer, high insulativity and durability of the material are guaranteed from a base body; secondly, the high-resistivity SBS resin is introduced to form the alloy, the compatibility of the high-resistivity SBS resin and PVC is improved through the grafting material, and the overall volume resistivity of the material is remarkably improved on the premise that the mechanical performance is guaranteed; and finally, by adding the argil and the calcium powder master batch, the insulating property of the material is further enhanced. The volume resistivity of the polyvinyl chloride modified material at 20 DEG C can reach 1 * 10 < 14 > omegam to 2 * 10 < 14 > omegam.

The utility model belongs to the technical field of separation devices, and particularly relates to a dioctyl terephthalate distillation system which comprises a distillation tower, a plurality of tower plates arranged in the distillation tower, a heat exchanger connected to the bottom of the distillation tower, a product storage tank connected to the top of the distillation tower and a stirring assembly arranged in the distillation tower, the stirring assembly comprises a stirring paddle and a spiral stirrer, the stirring paddle is located at the bottom of the distillation tower, a plurality of corrugated plates and a plurality of flow guide covers are arranged in the distillation tower, the corrugated plates are located above the flow guide covers, and the flow guide covers are located above the stirring paddle. According to the utility model, the space in the distillation tower is divided into three parts according to functions, and each section adopts a proper internal component, so that the optimization of the distillation effect is realized.

The application provides a chemical automatic distillation device and belongs to the technical field of crude dioctyl terephthalate. The chemical automatic distillation device comprises a tank body, a cavity separation net arranged in the tank body and used for separating a bottom cavity of the tank body into an inner cavity and an outer cavity, a pipe orifice separation net arranged at the bottom of the cavity separation net and inserted into the top end of a discharge pipe at the bottom of the tank body and used for separating an inner cavity of the discharge pipe from the outer cavity, a lower scale cleaning plate arranged between the side surface of the pipe orifice separation net and the bottom surface of the cavity separation net and in contact with the inner wall of the tank body, an upper scale cleaning plate slidingly arranged between the side surface of the cavity separation net and the top of the lower scale cleaning plate, and an intermittent rotation type guide rail assembly arranged on the side wall of the tank body. The application has the advantages of high heat transfer efficiency, anti-blocking, efficient scale and impurity cleaning.

This invention belongs to the technical field of polypropylene composite materials and discloses a high-impact, low-temperature resistant polypropylene composite material and its preparation method. The high-impact, low-temperature resistant polypropylene composite material of this invention, by weight, comprises 100 parts of PP resin, 20-30 parts of EPDM elastomer rubber, 10-20 parts of EDPM-g-MAH, 8-12 parts of carbon black, 4-6 parts of KH550 coupling agent, 2-5 parts of dioctyl terephthalate, 2-6 parts of lubricant, and 1-3 parts of compatibilizer. This material is prepared by grafting maleic anhydride end groups onto modified carbon black to generate a corresponding carbon black-EPDM-g-MAH elastomer. The carbon black-EPDM-g-MAH elastomer is then blended with EPDM to obtain a mixed toughening agent. This mixed toughening agent has good compatibility with the polypropylene matrix, improving the impact toughness of polypropylene while minimizing the decrease in its tensile strength and other mechanical properties. Simultaneously, the presence of carbon black promotes the formation of β-crystals in polypropylene, further enhancing the toughness and low-temperature resistance of the polypropylene material.

This invention discloses a polyvinyl chloride (PVC) sealing strip for refrigerators, its preparation method, and its application, belonging to the field of sealing material technology. The PVC sealing strip for refrigerators is mainly prepared from the following raw materials in parts by weight: 140-160 parts PVC, 4.2-4.8 parts stabilizer, 70-140 parts dioctyl terephthalate, 10-20 parts tributyl acetylacetonate, 20-40 parts epoxidized soybean oil, and 80-90 parts conductive filler. This sealing strip meets the requirements for flexible sealing in low-temperature environments and also possesses good electromagnetic shielding performance.

The invention discloses an environment-friendly formaldehyde-free waterproof and moistureproof stone-plastic composite wallboard and a preparation method thereof, and belongs to the technical field of composite wallboards. The PVC resin, the polypropylene resin, the cross-linked modified nano silicon dioxide, the glass fibers, the dioctyl terephthalate, the zinc borate and other components are subjected to the processes of mixing, extruding machine granulation, mold extrusion molding, cooling shaping, traction cutting and the like to prepare the stone-plastic composite wallboard. The comprehensive advantages of environmental protection, no formaldehyde, water resistance, moisture resistance, excellent mechanical property, high durability and the like are realized. Wherein the cross-linked modified nano silicon dioxide is prepared through a multi-step reaction, firstly, an intermediate containing a cross-linked structure and active sites is constructed through nucleophilic substitution and an ultraviolet light-initiated click reaction, then, the nano silicon dioxide is subjected to alkenylation modification, and finally, organic-inorganic chemical bonding is realized through a secondary click reaction. And through the synergistic effect of the cross-linked modified nano silicon dioxide and the glass fibers, the waterproof and moisture-proof performance, the mechanical property and the durability are remarkably improved.

The invention relates to the technical field of cables, and provides a corrosion-resistant cable and a preparation method thereof. A corrosion-resistant cable comprises a conductor layer and a sheath layer wrapping the conductor layer. The sheath layer is prepared from the following raw materials in parts by weight: 100-110 parts of PVC resin, 25-30 parts of modified hydrophobic diatomite / nano aluminum oxide filler, 8-12 parts of dioctyl terephthalate, 4-6 parts of a calcium-zinc composite stabilizer, 2-3 parts of a vulcanizing agent, 1-2 parts of an antioxidant, 2-3 parts of an ultraviolet light absorber, 0.8-1 part of polyethylene wax and 0.5-0.9 part of calcium stearate. According to the corrosion-resistant cable prepared in the invention, the waterproof and corrosion-resistant performance of the existing cable is improved.

The invention provides a polyvinyl chloride composition, a festoon optical cable containing the same and a preparation method of the festoon optical cable, and the polyvinyl chloride composition comprises the following components in parts by weight: 100 parts of polyvinyl chloride resin, 60-90 parts of a plasticizer, 5-10 parts of a charring agent and 30-50 parts of a flame retardant, the polymerization degree of the polyvinyl chloride resin is greater than or equal to 1700; the plasticizer comprises dioctyl terephthalate, and further comprises at least one of an ethylene-n-butyl acrylate-carbon monoxide terpolymer, diisooctyl sebacate or dioctyl adipate. The polyvinyl chloride composition is used for preparing an inner sheath of an optical cable, the low temperature resistance and flame retardant property of the optical cable can be improved, and meanwhile it is guaranteed that the optical cable has good flexibility and wear resistance.

This invention discloses a method for preparing dioctyl terephthalate (DOTP) from polyethylene terephthalate (PET), comprising: crushing, washing, and drying waste PET to obtain PET particles; depolymerizing the obtained PET particles in the presence of ethylene glycol and a composite depolymerization catalyst to obtain a depolymerization product; adding the obtained depolymerization product to octanol and a transesterification catalyst for transesterification reaction; after the reaction is completed, post-treatment yields dioctyl terephthalate; wherein the composite depolymerization catalyst is a mixture of zinc oxide and germanium dioxide; and the transesterification catalyst is a supported solid acid catalyst. This invention features high raw material utilization and good environmental performance, using waste PET as raw material to prepare DOTP via transesterification reaction, thus solving the pollution problem of waste PET; simultaneously, ethylene glycol, octanol, and the catalyst can be recycled during the reaction, reducing raw material consumption and wastewater.

The present application relates to the technical field of shoes, and provides an environment-friendly mosquito-repelling slipper and a production process thereof, which comprises the following steps: preparing the mosquito-repelling slipper by in-mold foaming of a composition, wherein the composition comprises the following components in parts by weight: 40-50 parts of type 3 polyvinyl chloride resin, 20-25 parts of tributyl citrate, 5-15 parts of dioctyl terephthalate, 1-3 parts of calcium carbonate, 1-1.5 parts of industrial soda foaming agent, 0.5-1 part of expanded microspheres, 0.3-0.5 part of internal lubricant, 0.3-0.5 part of external lubricant, 15-20 parts of mosquito-repelling traditional Chinese medicine powder and 2-3 parts of flame retardant. The present application solves the problems of the existing mosquito-repelling slippers, such as the non-ideal mosquito-repelling effect and the short mosquito-repelling duration.

This invention discloses a combined process for the pretreatment of polyester waste and the preparation of dioctyl terephthalate in the field of polymer chemical recycling and resource recycling. The process utilizes specially formulated layered molybdenum-titanium bimetallic phosphate nanosheets with intercalation catalysis as a catalyst. The crushed polyester waste is mixed with isooctanol and pretreated at a lower temperature, followed by a catalytic alcoholysis and transesterification reaction. Ethylene glycol is continuously removed by fractional distillation to drive the reaction to completion. After the reaction, the mixture is cooled and filtered to separate the regenerable solid catalyst. The filtrate is then neutralized, washed with water, and subjected to two-step vacuum distillation. This process achieves a high degree of synergy between the catalyst and the reaction steps, simplifying the traditional multi-step complex process into four core steps. It has the advantages of mild reaction conditions, simple and efficient process, recyclable catalyst, and high product purity, providing a novel and practical technical solution for the high-value resource utilization of polyester waste.

The utility model belongs to the technical field of separating devices, and particularly relates to a dioctyl terephthalate waste residue filtering system which comprises an evaporation and concentration device and a plate-and-frame filter press, a buffering and homogenizing reaction kettle is arranged between the evaporation and concentration device and the plate-and-frame filter press, and the top of the buffering and homogenizing reaction kettle is fixedly connected with a feeding structure. The feeding structure comprises a feeding square pipe and a discharging round pipe which are communicated with each other, an opening of the feeding square pipe is arranged upwards, the whole discharging round pipe is obliquely arranged downwards, an auger conveying device is fixedly mounted in the discharging round pipe, a stirring paddle is rotationally arranged in an inner cavity of the buffer homogenizing reaction kettle, and the stirring paddle is arranged in the buffer homogenizing reaction kettle. A stirring shaft of the stirring paddle is in transmission connection with a power output shaft of the auger conveying device, the bottom of the buffer homogenizing reaction kettle is fixedly connected with a discharging pipe, and one end, far away from the buffer homogenizing reaction kettle, of the discharging pipe is hermetically communicated with a filter pressing feeding hole of the plate-and-frame filter press. The device can solve the problem of agglomeration of pasty waste residues and stabilize the working condition of filter pressing and feeding.

The invention relates to the technical field of shoes, and provides an environment-friendly mosquito-repelling slipper and a production process thereof.The mosquito-repelling slipper is prepared from a composition through in-mold foaming, and the composition comprises, by weight, 40-50 parts of 3-type polyvinyl chloride resin, 20-25 parts of tributyl citrate, 5-15 parts of dioctyl terephthalate and 1-3 parts of calcium carbonate. 1-1.5 parts of an industrial soda foaming agent, 0.5-1 part of expanded microspheres, 0.3-0.5 part of an internal lubricant, 0.3-0.5 part of an external lubricant, 15-20 parts of mosquito-repelling traditional Chinese medicine powder and 2-3 parts of a flame retardant. The problems that an existing mosquito-repelling slipper is not ideal in mosquito-repelling effect and short in mosquito-repelling duration time are solved.

The invention discloses a ceramic tile anti-skid treatment gel paste suitable for an inclined vertical face, which is composed of a PEVA base layer, an anti-skid surface layer, a bonding layer and backing paper, the PEVA base layer is prepared from 50 to 60 parts by weight of high-density polyethylene, 5 to 10 parts by weight of low-density polyethylene, 3 to 5 parts by weight of ultra-high molecular weight polyethylene, 2 to 4 parts by weight of nano calcium carbonate, 20 to 30 parts by weight of vinyl acetate, 8 to 12 parts by weight of dioctyl terephthalate, 3 to 5 parts by weight of epoxidized soybean oil, 0.8 to 1.8 parts by weight of organic tin heat stabilizer and 0.3 to 0.5 part by weight of antioxidant; and 0.3-0.6 part by weight of a light stabilizer and 0.1-0.5 part by weight of color master batch. The invention relates to the technical field of building antiskid materials. Through the synergistic effect of all the layers of materials, the gel paste can be stably attached to the inclined facade ceramic tile, the transparency is high, the original attractiveness of the ceramic tile is not affected, and the gel paste is suitable for anti-skid treatment of the inclined facade ceramic tile in various humid environments such as bathrooms and stairs.

The application discloses a chemical depolymerization method for preparing dioctyl terephthalate based on polyester waste materials in the technical field of polymer material chemical recycling and resource recycling, which takes polyester waste materials as raw materials, first carries out alcoholysis reaction with ethylene glycol in the presence of a catalyst, then adds isooctanol to carry out ester exchange reaction, and finally separates and purifies the final product to obtain dioctyl terephthalate. The core of the method is to use a brand-new multi-level pore palladium cerium modified zeolite catalyst, which is prepared by taking sodium type zeolite as a precursor, sequentially constructing a multi-level pore structure through acid treatment and surfactant assisted hydrothermal crystallization, then step by step loading cerium species, palladium and iron components, and high-temperature reduction. The catalyst has suitable acidity and magnetism, can efficiently catalyze the continuous reaction process of alcoholysis and ester exchange, and can be simply recovered and recycled by means of an external magnetic field after reaction. The process steps are simple, the raw materials used are all commercially available products except for the specially made catalyst, and high-value resource utilization of the polyester waste materials is realized.

The present application relates to the technical field of polyester microplastic recycling, and particularly relates to a PET microplastic cleaning and impurity removing system and method. After raw materials are dynamically quantitatively fed and high-temperature cooking and washing, dehydration is performed, and the raw materials enter an integrated microplastic cleaning and separating device. In the dioctyl terephthalate water-based medium, a composite flow field is formed through central stirring, density stratification is strengthened by ultrasonic aeration, and floating resin impurities and bottom silt are step by step discharged by means of annular high and low closed mechanisms. Then, the purified PET wet material is discharged by a bottom opening and closing mechanism. After that, the PET wet material enters a tidal chute separating device, under the action of the tidal flow formed by the adjustable flow and the ultrasonic-pneumatic deagglomeration, the strengthened sedimentation and automatic deslagging of high specific gravity metal debris and sand are realized, and high-purity PET microplastics are obtained through dehydration and rinsing by a vibrating screen at the end. The system is simultaneously matched with a circulating water treatment unit, closed-loop utilization of solvents and water resources is realized, the purity and recovery rate of PET recycling are significantly improved, and the energy consumption and water consumption are reduced.

The invention discloses a membrane fusion liposome for generating CAR-M in vivo as well as a preparation method and application of the membrane fusion liposome, and relates to the technical field of biological medicines. The membrane fusion liposome comprises a lipid membrane and a plasmid which is wrapped by the lipid membrane and is provided with a CAR (Chimeric Antigen Receptor), the lipid membrane is prepared from DOTAP (Dioctyl Terephthalate), DOPE (Dioctyl Polyethylene), DSPE-PEG2000 (Distearoyl Sulfonate Polyethylene Glycol 2000) and According to the invention, the liposome is utilized to directly generate CAR-M in vivo, and a novel, convenient and efficient implementation scheme is provided for the CAR-M therapy to treat solid tumors.

This invention belongs to the field of new material preparation technology, specifically disclosing a high-wear-resistant rubber track material and its preparation method. The high-wear-resistant rubber track material, by weight, is prepared from the following raw materials: 60-100 parts nitrile rubber, 20-50 parts NV rubber-plastic alloy, 30-80 parts silica, 10-30 parts kaolin, 5-20 parts dioctyl terephthalate, 1-8 parts zinc oxide, 0.5-2 parts stearic acid, 0.5-5 parts antioxidant, 0.5-2 parts microcrystalline wax, 1-5 parts PEG4000, 0.5-5 parts coupling agent, 0.5-2 parts vulcanizing agent, and 2-8 parts accelerator. The rubber track material provided by this invention is mainly composed of NBR+PVC blend material. By combining functional additives and optimizing the preparation process, the prepared material is suitable for making tracks, meeting the requirements of wear resistance, no black mark, and excellent overall performance.

The utility model belongs to the technical field of wastewater treatment, and particularly relates to a wastewater treatment system for dioctyl terephthalate production, which comprises a settling tank, a distillation tower connected with the settling tank, a heating component arranged outside the distillation tower, a steam compressor connected with the top of the distillation tower and an alcohol liquid recovery tank connected with the top of the distillation tower, and a steam buffer tank connected with the alcohol liquid recovery tank. The bottom of the settling tank and the bottom of the distillation tower are connected with waste residue storage tanks, a filter assembly is arranged in the settling tank, and a plurality of buffer plates are arranged in the steam buffer tank in a staggered mode. According to the utility model, the distillation unit in the wastewater recycling process is combined with energy recycling, so that the operation cost of the whole wastewater treatment system is further greatly reduced, heat generated in the distillation process can realize self-circulation and can also be used for other production links, and centralized and reduction treatment of waste residues is realized.

The invention discloses a radioactive therapy microsphere and a preparation method thereof. The radioactive therapy microsphere comprises a degradable polymer, DOTA (DOTA-Dioctyl Terephthalate) and radionuclide, wherein the DOTA is connected with the degradable polymer through a chemical bond, and the radionuclide is chelated on the DOTA. According to the radioactive therapy microsphere provided by the embodiment of the invention, the degradable polymer is used as a base material, DOTA (1, 4, 7, 10-tetraazacyclododecane-1, 4, 7, 10-tetraacetic acid) is stably connected to a polymer skeleton through chemical bonds, and radionuclides are further chelated, so that the radiation therapy effect is improved, and the radiation therapy effect is improved. And the radioactive treatment microsphere with biocompatibility, targeted delivery capability and high radiation stability is constructed.