162 results about "Dimethyl terephthalate" patented technology

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 a production method of a PET composite current collector base film with high mechanical property. The base film comprises an outer surface layer, a middle core layer and an inner surface layer, the outer surface layer is composed of PET, fumaric acid, hydroxyl-terminated polybutadiene and an antioxidant; the middle core layer consists of PET (Polyethylene Terephthalate), furandicarboxylic acid, an antioxidant and a stabilizer; the inner surface layer is composed of dimethyl terephthalate, ethylene glycol, spiro diol, ethylene glycol antimony and zinc acetate. The PET composite current collector base film prepared by the preparation method disclosed by the invention has relatively high mechanical properties.

The invention relates to the technical field of polyester fibers, and discloses a waterproof and antibacterial polyester fiber fabric and a preparation method thereof. N,N'-bis(2-hydroxyethyl)ethylenediamine, N,N'-di-Boc-S-methylisothiourea and the like are used as raw materials, and the raw materials are subjected to an esterification polycondensation reaction with dimethyl terephthalate to obtain a waterproof and antibacterial copolyester polymer having a structure similar to that of PET polyester. The waterproof and antibacterial copolyester polymer contains a quaternary ammonium salt, a guanidine group and a hydrophobic long chain structure, which can be evenly distributed in a polyester fiber matrix, thereby avoiding the migration of antibacterial groups and better exerting the antibacterial performance against bacteria. The C-F bond energy is high, and fluorine atoms are more easily embedded in the polymer, blocking the channel for water molecules to migrate into the inside of the coating film, and a stable protective layer can be formed on the surface of the fiber fabric to wrap the fiber and prevent water from penetrating into the inside of the fiber, thereby playing a waterproof role. At the same time, the hydrophobic layer also has certain durability and can withstand multiple washings without failure.

The invention discloses a preparation method of a long-acting antistatic polymer master batch for skin-core spinning polyester, and relates to the technical field of high polymer material preparation. The hard segment comprises the following components: 100 parts of aromatic polyester, the aromatic polyester is generated through a reaction of 100 parts of an aromatic monomer and 80-120 parts of aliphatic dihydric alcohol, the aromatic monomer is dimethyl terephthalate, and the aliphatic dihydric alcohol is 1, 4-butanediol. Through cooperation of the hard segment structure, the soft segment structure, the polyaniline, the protonic acid, the ionic liquid, the fluorine-containing polymer and the sulfonate, the problems that the antistatic performance of the polyester master batch depends on environment humidity, the subsequent process is easy to lose efficacy, and the compatibility with a polyester matrix is poor are solved; the master batch can maintain a stable antistatic effect in a low-temperature and low-humidity environment, the performance of the master batch is not attenuated after subsequent procedures such as elasticizing and printing and dyeing, meanwhile, short filaments and broken filaments are avoided in the spinning process, and the continuity of polyester fiber production and the quality of finished products are improved.

The invention relates to a catalyst for preparing 1, 4-cyclohexanedimethanol (CHDM) by catalyzing dimethyl terephthalate (DMT) hydrogenation and a preparation method thereof, non-noble metals nickel (Ni) and copper (Cu) are used as active components, silicon dioxide is used as a carrier, ammonia water in a solution is evaporated out after ammonia water precipitation, and a catalyst sample is obtained. The active components mainly adopt metal Ni and Cu elements with relatively low price, compared with noble metals such as ruthenium, rhodium, platinum and the like, the use cost of the catalyst is greatly reduced, the bimetallic catalyst Ni-Cu-SiO2 is prepared by an ammonia distillation method, 1, 4-cyclohexanedimethanol can be prepared by catalyzing dimethyl terephthalate hydrogenation by a one-pot method, and the catalyst has a wide application prospect. The preparation cost of the catalyst is relatively low, the dispersity and stability of the catalyst are improved by adopting an ammonia distillation method, the CHDM is prepared by adopting a one-pot method, the energy consumption is further reduced, the reaction procedure is simplified, and the preparation method is simple and is easy to amplify to industrial production.

The present invention discloses a method for preparing a recycled copolyester and a heat-shrinkable film thereof, belonging to the field of waste polyester recycling. The method utilizes technologies such as glycolysis and methanol transesterification of waste polyester to produce recycled dimethyl terephthalate, which is then transesterified with other modifying monomers and ethylene glycol, followed by polycondensation, to produce the recycled copolyester. Finally, the recycled copolyester is directly delivered to the extrusion dies via a melt delivery pipeline and a metering pump to produce the recycled polyester heat-shrinkable film. The recycled polyester heat-shrinkable film exhibits high shrinkage, excellent toughness, and transparency, while also achieving high-value recycling of waste polyester.

The invention discloses a cool breathable fiber and a preparation method thereof, and relates to the field of fibers. When the cool-feeling breathable fiber is prepared, shell powder sequentially reacts with 3-chloropropyltrimethoxysilane, 2, 6-dihydroxy naphthol and 3, 3-diphenyl-2-propyne-1-alcohol, and functionalized shell powder is prepared; the preparation method comprises the following steps: reacting (formylmethyl) diethyl phosphate with (4-pyridyl) acetone, firstly polymerizing with dimethyl terephthalate and ethylene glycol, and then reacting with N-[4-(aminomethyl) phenyl] guanidine to prepare modified polyester; and finally, mixing the modified polyester, the functionalized shell powder and zinc acetate, and spinning to obtain the cool breathable fiber. The cool breathable fiber prepared by the invention has flame-retardant, durable and antibacterial capabilities.

The invention relates to the technical field of polymeric membrane materials, in particular to a functional packaging membrane material and a preparation method thereof. The packaging film material is prepared from PET, PLA, a modifier and an ultraviolet absorbent, wherein the modifier is formed by grafting dimethyl terephthalate, ethylene glycol and dihydroxyl-terminated polylactic acid to the surface of carboxylated graphene after ester exchange. Under the synergistic effect of the carboxylated graphene nanosheets and the modifier, the uniform dispersion and interface bonding strength of the nanofiller are effectively improved, so that the compatibility of PET (Polyethylene Terephthalate) and PLA (Polylactic Acid) is optimized. According to the structural design, the comprehensive performance such as tensile strength, toughness, gas barrier property and thermal deformation temperature of the composite material can be remarkably improved, and meanwhile, good processability and degradability of the material are guaranteed. The invention provides reliable technical support for developing a novel green packaging film material with high performance and low environmental burden, and has wide industrial application prospect.

The invention discloses a dimethyl terephthalate hydrogenation reduction catalyst preparation method, which comprises: (1) dropwise adding a cerium salt aqueous solution into an alkali solution, carrying out a hydrothermal reaction at a temperature of 110-140 DEG C, drying the solid in the system after the reaction is completed, and calcining for 3-8 h at a temperature of 400-600 DEG C to obtain a nanometer-configuration cerium dioxide carrier; and (2) mixing the cerium dioxide carrier with a ruthenium salt aqueous solution, adding alkali to control the pH value to be 13-14, drying the obtained solid, and calcining at 450-650 DEG C for 3-8 hours to obtain the target catalyst. Meanwhile, the invention also discloses a method for preparing dimethyl 1, 4-cyclohexanedicarboxylate by using the catalyst for hydrogenation reduction of dimethyl terephthalate. The catalyst shows excellent catalytic performance when used for dimethyl terephthalate hydrogenation. In addition, the catalyst is centrifugally separated, so that the cyclic utilization stability is good, and the catalyst has a relatively good industrial application prospect.

The invention discloses an acid and alkali resistant fiber and a preparation method thereof, and relates to the field of fiber fabrics. When the acid and alkali resistant fiber is prepared, dimethyl terephthalate, polyethylene glycol-2000, ethylene glycol, 1, 3-bis (3-hydroxypropyl)-1, 1, 3, 3-tetramethyldisiloxane and diethyl phosphite are polymerized and then react with 4-vinyl benzoyl chloride and 2-mercaptobenzothiazole in sequence, and modified polyester is prepared; the preparation method comprises the following steps: sequentially reacting microcrystalline cellulose with 3-(chloromethyl)-2-hydroxybenzaldehyde, 4-allylthiosemicarbazide and copper chloride to prepare modified cellulose; the modified cellulose and the modified polyester are mixed and subjected to melt spinning, then perfluoroethylene is used for after-finishing, and the acid and alkali resistant fiber is prepared. The acid and alkali resistant fiber prepared by the invention has durable, flame-retardant and antibacterial capabilities.

The invention relates to a method for preparing dimethyl terephthalate by catalyzing waste polyester in one step and dimethyl terephthalate. The invention relates to a method for preparing dimethyl terephthalate by catalyzing waste polyester in one step, which comprises the following steps: mixing a waste polyester material, a catalyst and a depolymerization solution for depolymerization reaction to obtain dimethyl terephthalate, the catalyst is selected from aromatic acid, aromatic acid alkali metal salt, a composition of aromatic acid and carbonate, a composition of aromatic acid and phosphate, a composition of aromatic acid and acetate, a composition of aromatic acid alkali metal salt and carbonate and a composition of aromatic acid alkali metal salt and phosphate; and a composition of aromatic acid alkali metal salt and acetate. The invention also provides the dimethyl terephthalate prepared by the method. The method provided by the invention solves the problems of low product purity and yield in the existing polyester waste chemical recovery method, and also solves the problems of high catalyst cost, harsh reaction conditions and easy secondary pollution to the environment in the existing recovery method.

The invention discloses a method for synthesizing dialkyl terephthalate through waste PET plastic alcoholysis based on a VTa-coated NC / C catalyst, the conversion rate of PET plastic is 100%, the yield of dimethyl terephthalate and ethylene glycol is as high as 99%, no obvious inactivation phenomenon exists after the catalyst is used for 10 times, and the method is suitable for industrial production. The catalytic system is also effective to n-butyl alcohol, 2-ethylhexanol, isononyl alcohol, isodecyl alcohol and ethylene glycol, a series of plastic additives and ethylene glycol can be obtained, and the product yield is 89% or above.

The invention relates to the technical field of high polymer material recovery, in particular to a composite catalyst for preparing DMT through PET alcoholysis and a preparation method and application of the composite catalyst. The composite catalyst comprises a solid acid material which is obtained by carrying out proton transfer reaction on silica gel of which the surface is grafted with aluminum alkyl and perfluoroalkyl sulfonic acid of which the general formula is Rf-SO3H, wherein Rf is a perfluoroalkyl group with the carbon atom number of 1-10. Through the synergistic effect of the components, the composite catalyst shows excellent performance in the process of degrading PET (Polyethylene Terephthalate) by monohydric alcohol. When methanol is used as an alcoholysis agent, the yield of the main product dimethyl terephthalate (DMT) can reach 95% or above, the catalytic efficiency is high, the stability is good, an efficient catalyst is provided for industrialization of chemical recovery of PET, and the method has important economic and environmental values.

The application discloses a kind of encapsulation carrier plate and thermoplastic polyester elastomer material and preparation method, it is related to polymer material technical field.The thermoplastic polyester elastomer material includes following weight parts raw materials: 25-40 parts modified dimethyl terephthalate, 15-25 parts 1, 4-butanediol, 0.07-0.25 parts titanium acid tetraisopropyl ester, 0.25-0.5 parts antioxidant 168, 12-20 parts polytetrahydrofuran ether glycol, 8-15 parts modified 1, 4-butanediol, 1-3 parts isophorone diisocyanate, 5-10 parts basalt fiber, 2-6 parts flake graphite, 2-5 parts tributyl citrate, 1-4 parts methyl phenyl silicone resin, 2-3 parts polyolefin elastomer, 0.2-0.8 parts ultraviolet absorber UV-1577.The thermoplastic polyester elastomer uses modified dimethyl terephthalate and modified 1, 4-butanediol to improve performance, basalt fiber and flake graphite are treated by silanization to enhance compatibility, stepwise temperature control initiation process optimizes grafting uniformity, by double prepolymer melt blending, mechanical properties and stability are considered, the service life is extended by adding antioxidant and ultraviolet absorber.

The application provides a 2-amino terephthalic acid dimethyl ester-tetracyano benzene eutectic crystal as well as a preparation method and application thereof, the eutectic crystal is of a triclinic system, a space group is a cell parameter is alpha = 95.041 (2) °, beta = 90.337 (2) °, gamma = 97.670 (2) °, and a cell volume is The 2-amino terephthalic acid dimethyl ester-tetracyano benzene eutectic crystal provided by the application increases the solid melting point of the organic compound from 133.39 DEG C to 162.23 DEG C without changing the covalent bond of the compound, enhances the thermal stability, and meanwhile, the fluorescence emission color, the fluorescence lifetime and the quantum yield are obviously changed.

The application discloses a preparation method of a dimethyl terephthalate hydrogenation catalyst, which comprises the following steps: (1) adding a cerium salt aqueous solution into an alkali solution, and performing a hydrothermal reaction at 110-140 DEG C; after the reaction is completed, drying the solid in the system, and calcining at 400-600 DEG C for 3-8 hours to obtain a nano-structured cerium dioxide carrier; (2) mixing the cerium dioxide carrier with a ruthenium salt aqueous solution, adding an alkali to control the pH value to be 13-14, drying the obtained solid, and calcining at 450-650 DEG C for 3-8 hours to obtain the target catalyst. The application also discloses a method for preparing dimethyl 1,4-cyclohexane dicarboxylate by hydrogenating dimethyl terephthalate by using the catalyst. When the catalyst is used for hydrogenating dimethyl terephthalate, the catalyst exhibits excellent catalytic performance. In addition, the catalyst has good stability in circulation and application, and has a good industrial application prospect.

The invention discloses a degradable environment-friendly fiber and a preparation method thereof, and relates to the field of fibers. When the degradable environment-friendly fiber is prepared, triethyl phosphite firstly reacts with 3-(2-bromoethyl) thiophene and then reacts with dimethyl terephthalate and ethylene glycol, and modified polyester is prepared; the preparation method comprises the following steps: enabling chitosan oligosaccharide to react with 4-hydroxy-3-pyridylaldehyde, thionyl chloride and 2-(dimethylaminomethyl) thiophene in sequence, so as to prepare functionalized chitosan oligosaccharide; mixing the functionalized chitosan oligosaccharide, zinc acetate and modified polyester, and performing melt spinning to obtain composite fibers; mixing thiophene, ferric chloride and trichloromethane to prepare a thiophene solution; and immersing the composite fiber in a thiophene solution, and drying to obtain the degradable environment-friendly fiber. The degradable environment-friendly fiber prepared by the invention has excellent flame retardance, antibacterial property, antistatic property and light aging resistance.

The present disclosure relates to the formation of dimethyl terephthalate (DMT) and mono ethylene glycol (MEG). The present invention also relates to the depolymerization of polyethylene terephthalate (PET) and the recovery of dimethyl terephthalate (DMT) and mono ethylene glycol (MEG) using sodium methoxide as a catalyst.

The application relates to the technical field of polyester fibers, and discloses a polyester fiber fabric preparation method, which takes N,N'-bis(2-hydroxyethyl)ethylenediamine, N,N'-di-Boc-S-methyl isothiourea and the like as raw materials, and is subjected to esterification polycondensation reaction with dimethyl terephthalate to obtain a waterproof antibacterial copolyester polymer with a similar structure to PET polyester; the waterproof antibacterial copolyester polymer contains quaternary ammonium salt, guanidine and a hydrophobic long-chain structure in the structure, can be uniformly distributed in a polyester fiber matrix, migration of antibacterial groups is avoided, and the antibacterial performance on bacteria is better; the C-F bond energy is high, fluorine atoms are more easily embedded into the polymer, the channel for water molecules to migrate to the inside of the coating is blocked, a stable protective layer can be formed on the surface of the fiber fabric, the fiber is wrapped, water permeation into the fiber is prevented, and thus the waterproof effect is achieved; meanwhile, the hydrophobic layer also has certain durability and can withstand multiple water washes without failure.

The present invention relates to a recycled polyester resin composition comprising recycled dimethyl terephthalate prepared using waste polyester, and a molded article manufactured therefrom. Specifically, according to an embodiment of the present invention, the recycled polyester resin composition includes: a recycled polyester resin including a repeating unit derived from a glycol component and a repeating unit derived from recycled dimethyl terephthalate (rDMT); a hindered phenol-based primary antioxidant; and a phosphorus-based or sulfur-based secondary antioxidant, thereby improving crystallinity, heat resistance, and volatility resistance. Therefore, when a molded article of a headlamp for a vehicle is manufactured using the recycled polyester resin composition, excellent performance can be exhibited.

The application provides a polyester and CO2 co-catalytic conversion method, wherein CO2 reacts with hydrogen to generate methanol under the action of a catalyst, polyester is depolymerized to generate dimethyl terephthalate under the action of methanol, and dimethyl terephthalate is further converted into a hydrogenation product through hydrogenation under the action of a catalyst; the polyester is selected from any one of polyethylene terephthalate (PET) and polybutylene terephthalate (PBT). The application realizes the co-efficient conversion of CO2 and PET or PBT through the series connection of three reactions of CO2 hydrogenation to generate methanol, polyester methanol depolymerization and dimethyl terephthalate hydrogenation, and chemical waste CO2 and PET or PBT plastic can be recycled at the same time.

The invention discloses a display protective film and a preparation method thereof, and relates to the technical field of film materials. When the display protective film is prepared, nano silicon dioxide is sequentially reacted with 2-(p-aminophenyl) ethyltriethoxysilane, 1-pyrazole methanol and zinc chloride to prepare modified nano silicon dioxide; the preparation method comprises the following steps: polymerizing ethylene glycol, dimethyl terephthalate, dimethyl phosphonite and dimethyl 4-pyridyl-4-pimelate to prepare polyester; the preparation method comprises the following steps: reacting polyester with 1-bromohexane to prepare modified polyester; and mixing the modified polyester, the modified nano silicon dioxide and a reversible cross-linking agent, and carrying out melt extrusion, sheet casting and two-way stretching to obtain the display protection film. The prepared display protective film has excellent antibacterial, self-repairing and mechanical properties.

The invention discloses a deodorant skin-friendly fabric and a preparation method thereof, and relates to the field of fiber fabrics. When the deodorant skin-friendly fabric is prepared, microcrystalline cellulose sequentially reacts with ethylene (chloromethyl) dimethoxysilane and 1-amino-4-butylguanidine dihydrochloride, and modified cellulose is prepared; the preparation method comprises the following steps: polymerizing dimethyl terephthalate, 2-vinyl propane-1, 3-diol and ethylene glycol, and reacting with mercaptopropyl methyl dimethoxy silane to prepare modified polyester; the preparation method comprises the following steps: reacting anhydrous citric acid with cysteamine hydrochloride to prepare an ultraviolet absorbent; the preparation method comprises the following steps: reacting 3-[(2, 3)-epoxypropoxy] propyl methyl dimethoxy silane with DOPO (9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide) to prepare modified siloxane; and mixing the modified polyester and the modified cellulose, spinning, and sequentially carrying out surface treatment by using an ultraviolet absorbent and a silane mixed solution to obtain the deodorant skin-friendly fabric. The deodorant skin-friendly fabric prepared by the invention has flame-retardant and durable capabilities.

The invention belongs to the technical field of organic materials, and relates to an organic fluorescent anti-counterfeiting material as well as a preparation method and application thereof, and the organic fluorescent anti-counterfeiting material is prepared by taking a paeonol boron difluoride compound as a guest molecule as well as dimethyl terephthalate (DTT) as a host molecule, the mass ratio of the host molecules to the guest molecules is (100-1000): 1, and the host molecules and the guest molecules are mixed, dissolved and assembled. The fluorescent anti-counterfeiting process has the characteristics of simplicity, convenience, rapidness and high efficiency, and is particularly suitable for application scenes needing rapid verification.

The invention discloses an antibacterial polyester fiber and a preparation method thereof, and relates to the technical field of high polymer materials. When the antibacterial polyester fiber is prepared, 1, 3, 5, 7-tetramethylcyclotetrasiloxane, solid super acid and 1, 3-bis (hydroxypropyl) tetramethyldisiloxane react to prepare hydroxyl-terminated methyl hydrogen-containing silicone oil, and then the hydroxyl-terminated methyl hydrogen-containing silicone oil reacts with dimethyl terephthalate and ethylene glycol to prepare polysiloxane copolyester; the preparation method comprises the following steps: carrying out phosphorus-hydrogen addition modification on polysiloxane copolyester and diphenyl (4-vinyl phenyl) phosphine, and then carrying out quaternary phosphonium modification on the modified polysiloxane copolyester and 4-bromine-butylamine hydrobromide to prepare antibacterial modified copolyester; preparing ZIF-8 powder and loading an anti-aging agent; and finally, mixing the antibacterial modified copolyester and the ZIF-8 loaded with the anti-aging agent, melting and spinning to prepare the antibacterial polyester fiber. The antibacterial polyester fiber prepared by the method has excellent antibacterial, flame-retardant and antioxidant properties and the like.

Provided is a method of collective treatment of organic wastewater discharged in processes of manufacturing purified terephthalic acid (PTA) and dimethyl terephthalate (DMT) which are raw materials for polyethylene terephthalate (PET). The inventors found that collective anaerobic biological wastewater treatment of PTA manufacturing wastewater and DMT manufacturing wastewater enables both the wastewaters to be collectively treated with efficiency more than the conventional efficiency of treatment of PTA manufacturing wastewater. The present invention was thus accomplished.

The invention provides a selective hydrogenation catalyst as well as a preparation method and application thereof. The catalyst takes aluminum oxide as a carrier, platinum group metal as an active component and one or more of sodium, potassium, titanium and lanthanum as auxiliaries; the catalyst comprises an outer layer and an inner layer, and the mass ratio of an active component (in terms of metal elementary substance) to an auxiliary agent (in terms of metal elementary substance) in the outer layer is (30-300): 1, preferably (50-300): 1; in the inner layer, the mass ratio of the active component (in terms of metal elementary substance) to the auxiliary agent (in terms of metal elementary substance) is 1: (60-450), preferably 1: (80-450). The noble metal active components in the catalyst are highly uniformly dispersed, and the active components are mainly and intensively distributed on the outer layer of the catalyst, so that the catalyst shows good activity and stability when being applied to the process of preparing 1, 4-cyclohexanedicarboxylic acid dimethyl ester through selective hydrogenation of dimethyl terephthalate.

The invention relates to the technical field of polyester waste recycling, in particular to an acid-base double-site metal-free catalyst as well as a preparation method and application thereof. The acid-base double-site metal-free catalyst provided by the invention is suitable for oxidative depolymerization of polyester, especially polyethylene glycol terephthalate, is low in catalyst dosage, and has the characteristics of excellent reaction kinetics performance, environmental protection property and recyclability. When the temperature is 180 DEG C and the mass ratio of the PET waste to the catalyst is 100: 1, the reaction is carried out for 30 minutes, the PET degradation rate is 99.97%, the ethylene glycol yield is 91.53%, and the dimethyl terephthalate yield is 90.62%. The mass ratio of the PET waste to the catalyst is further increased to 150: 1, and the PET degradation rate is still kept at 97.68%, so that the acid-base double-site metal-free catalyst provided by the invention has excellent depolymerization performance under the condition of high PET loading capacity.

The invention discloses a fireproof flame-retardant fiber and a preparation method thereof, and relates to the technical field of fibers. When the fireproof and flame-retardant fiber is prepared, luteolin and 3-chloro-1-propylene are subjected to a reaction, and modified luteolin is prepared; the modified luteolin and zinc acetate are subjected to a reaction, and a luteolin complex is prepared; the preparation method comprises the following steps: reacting pyridinium salt dimethyl pimelate, dimethyl terephthalate, 1, 6-hexanediol and dihydroxy DOPO (9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide) to obtain copolyester; acrylic acid is polymerized and coated on the surface of magnesium hydroxide to prepare modified magnesium hydroxide; and uniformly mixing the modified magnesium hydroxide, a luteolin complex and copolyester, carrying out melt spinning, and treating with azodiisobutyronitrile to obtain the fireproof flame-retardant fiber. The fireproof flame-retardant fiber prepared by the invention has excellent flame retardance, antibacterial property and mechanical strength.