130 results about "Crystallization rate" patented technology

The invention belongs to the technical field of photoelectric materials and devices, and particularly relates to a perovskite thin film and a preparation method and application thereof. A fluorine-containing phosphazene compound is used as a ligand and is mixed with a perovskite precursor solution composed of lead iodide, formamidine iodine and cesium iodide, spin coating is performed, the fluorine-containing phosphazene compound and part of formamidine cations form hydrogen bonds, part of formamidine cations are anchored at the bottom of a perovskite film, Cs-formamidine cations are uniformly distributed, and the perovskite film is prepared. Meanwhile, the fluorine-containing phosphazene compound and Pb < 2 + > form a coordinate bond, Pb < 2 + > defects are passivated, and the perovskite thin film is obtained through anti-solvent treatment and annealing treatment. The fluorine-containing phosphazene compound interacts with the components in the perovskite precursor solution, so that the nucleation rate of perovskite can be increased, the crystallization rate can be slowed down, the tensile stress can be eliminated, the perovskite does not enter crystal lattices, and the stability and crystallinity of the film are guaranteed. The perovskite thin film can be used for an inverted perovskite solar cell, and the performance and the stability of a device are improved.

The utility model relates to the technical field of photovoltaic cells, and discloses a selective passivation contact structure and a double-sided selective TOPCon cell. The selective passivation contact structure comprises a silicon wafer, the back surface of the silicon wafer is sequentially provided with a first tunneling oxide layer and first boron-doped polycrystalline silicon, and a back surface electrode contact region of the first boron-doped polycrystalline silicon is also provided with second boron-doped polycrystalline silicon; the thickness of the first boron-doped polycrystalline silicon is smaller than that of the second boron-doped polycrystalline silicon, the crystallization rate of the first boron-doped polycrystalline silicon is larger than that of the second boron-doped polycrystalline silicon, and the doping concentration of the first boron-doped polycrystalline silicon is larger than that of the second boron-doped polycrystalline silicon. The selective passivation contact structure can reduce parasitic absorption of light, reduce recombination and improve the passivation effect and the transverse transmission performance of carriers, so that the open-circuit voltage, the short-circuit current, the fill factor and the cell efficiency of the double-sided selective TOPCon cell can be further improved.

The invention relates to the field of photovoltaic technology, and discloses a solar cell and a preparation method thereof. The solar cell comprises a silicon substrate, wherein the back surface of the silicon substrate comprises first regions and second regions which are alternately arranged; the first dielectric layer is located in the first region; the first doping layer is positioned on one side, deviating from the silicon substrate, of the first dielectric layer; the second doping layer is located on the side, away from the first dielectric layer, of the first doping layer; wherein the crystallization rate of the first doping layer is greater than that of the second doping layer, and the thickness of the second doping layer is greater than that of the first doping layer. The passivation contact performance of the battery can be improved, and the conversion efficiency of the battery is improved.

The invention discloses a hydrolysis-resistant PBT reinforced material capable of being subjected to laser welding and a preparation method of the hydrolysis-resistant PBT reinforced material, and belongs to the field of engineering plastics. Comprising the following raw materials in parts by mass: 45-70 parts of PBT resin, 0.5-1 part of a nucleating agent, 0.5-1 part of a nucleating auxiliary agent, 0.1-1 part of an antioxidant, 0.1-1 part of a lubricant, 0.2-0.8 part of a hydrolysis-resistant agent, 1-3 parts of a toughening agent and 25-45 parts of glass fibers, the nucleating auxiliary agent is sodium-doped potassium aluminosilicate. The nucleating agent can improve the crystallization rate of PBT, refine the grain size and reduce light scattering, and the hydrolysis-resistant agent can block autocatalytic hydrolysis circulation. And the composite sodium-doped potassium aluminosilicate not only can provide a large number of sites for PBT nucleation, but also can adsorb and capture water molecules in the environment and small molecules in an adsorption material and reduce hydrolysis reaction, so that the reinforced PBT material can be suitable for laser welding, and the long-term stability of the material in a high-temperature and humid environment can be guaranteed.

Disclosed is a polymer composition including a polyester copolymer and a biodegradable polymer, wherein the polyester copolymer includes two types of ester bond-forming monomer residues as main structural units, when the two types of ester bond-forming monomers are defined as “monomer A” and “monomer B”, respectively, the polyester copolymer satisfies (1) to (3) below, the biodegradable polymer has a melting point of 100° C. or higher, and the biodegradable polymer is included in an amount of 0.1% by weight or more and less than 30% by weight in 100% by weight of the total of the polyester copolymer and the biodegradable polymer. The present invention provides a polymer composition having low Young's modulus and high tensile strength. (1) An R value represented by the following formula is 0.45 or more and 0.99 or less. R=[AB] / (2[A][B])×100, where [A]: molar fraction (%) of monomer A residues in the polyester copolymer, [B]: molar fraction (%) of monomer B residues in the polyester copolymer, and [AB]: molar fraction (%) of a structure in which monomer A residues and monomer B residues are adjacent to each other (A-B and B-A) in the polyester copolymer. (2) A crystallization rate of monomer A residues and a crystallization rate of monomer B residues are less than 14%. (3) A melting point is lower than 100° C. or a clear melting point does not exist.

The invention particularly relates to a preparation method of a functional carrier for inducing crystallization of high-salinity leachate, and aims to solve the problems of low removal efficiency of multivalent ions in high-salinity wastewater, low crystallization rate and difficulty in resource recovery. According to the functional carrier, silanization modified FeO and aniline are subjected to in-situ polymerization to form a core-shell structure, the core-shell structure is compounded with activated nano CaCOs, and the functional carrier with a hierarchical porous structure, surface difunctional acid-base sites and superparamagnetism is prepared through a sol-gel method and temperature-controlled calcination. By the adoption of the technical scheme, efficient synergistic adsorption and directional induced crystallization of ions such as sulfate radicals, calcium and magnesium can be achieved, the crystallization induction period is remarkably shortened, good regeneration performance and magnetic separation convenience are achieved, and the method is suitable for efficient treatment of high-salt leachate and salt resource recycling.

The invention discloses a bio-based low-carbon environment-friendly functional furan polyester fiber and a preparation method thereof. The invention belongs to the technical field of macromolecules, and particularly relates to a polyfurandicarboxylic acid cyclohexanedimethanol-ethylene glycol copolyester fiber. The invention also provides a preparation method of the bio-based furan copolyester, and the bio-based furan copolyester obtained according to the preparation method provided by the invention has higher crystallinity and crystallization rate, excellent fiber mechanical properties and remarkable antibacterial property, and is a sustainable environment-friendly fiber with good comprehensive properties. The bio-based furan copolyester fiber and the like can be widely applied to the related fields of conventional clothes, home textiles and the like.

The invention provides a method for reducing short broken bracts of a single crystal silicon rod. The method comprises the following steps: acquiring a pulling speed correction in a medium-diameter section of a previous crystal rod; the actual shouldering power drop amplitude value of the previous crystal bar is obtained; and obtaining a pre-shouldering power drop value of the next crystal bar based on the pulling speed correction and the shouldering power drop value of the previous crystal bar. According to the method for reducing the short broken bracts of the silicon single crystal rod, the pulling speed deviation caused by the difference of shouldering power drop amplitude in different coil bases can be accurately corrected, the reliability is high, the reproducibility is good, the stability of crystal growth is guaranteed, the occurrence rate of the short broken bracts can be reduced, and the crystallization rate of crystal growth is increased.

The invention discloses a 3F-BZH-containing perovskite crystallization regulation and control method and a battery preparation method, 3F-BZH is introduced into an organic salt as an additive to regulate and control the crystallization rate, and the reaction rate between the organic salt and PbI2 is slowed down by virtue of the interaction between a Cheno group in 3F-BZH and the organic salt, so that the crystallization process of a perovskite film is delayed, and the reaction is more complete. According to the method, the crystallization quality of the thin film is improved, non-radiative recombination of current carriers is inhibited, the defect state density in the perovskite thin film is effectively reduced, and the high-quality perovskite thin film is successfully prepared. Finally, under the synergistic effect of crystallization regulation and control and defect passivation, the 3F-BZH improves the performance of a perovskite solar cell device, and the conversion efficiency of 22.77% is obtained.

The application provides a continuous crystallization mother liquor concentration regulation and impurity removal device and method, and belongs to the technical field of continuous crystallization equipment. A suction circulating pipe is designed outside the crystallization tank to ensure that the mother liquor fully flows in the whole continuous crystallization system, the concentration of the crystallization mother liquor is homogenized, and local supersaturation and thermal crystallization are avoided. A first inner pipe is arranged above the working liquid level in the crystallization tank to draw out the upper impurities and the accumulated light component mother liquor of the crystallization tank. In combination with the design of the open mother liquor and the impurity separation device, not only can the crystallization rate be reduced due to the too low local concentration, but also the impurities enriched at the top of the crystallization tank can be discharged, so that the influence of the impurities on the crystal quality is greatly reduced. In combination with the mother liquor parameter monitoring device arranged on the outer circulating pipe, the parameters of the crystallization mother liquor can be monitored in real time, the mother liquor extraction and circulation amount are more controllable, the crystallization environment stability is improved, and the efficient and stable generation of large particle crystals is facilitated.

The present application relates to the technical field of polyester material modification, and particularly relates to a high-transparency polyethylene naphthalate material, a preparation method and application, aiming at the problems of fast crystallization rate of the PEN material in the process of processing and molding, easy crystallization of thick products, light transmittance reduction caused by the crystallization, and insufficient material toughness, the present application introduces a diol monomer containing a side group and a flexible chain segment diol monomer into the PEN melt polycondensation process for copolymerization, wherein the diol containing a side group introduces a steric hindrance structure in the molecular chain to destroy the regular packing of the PEN molecular chain, thereby inhibiting the material crystallization behavior and improving the light transmittance of the thick product; the flexible diol introduces a flexible chain segment in the molecular chain to increase the free volume of the molecular chain and improve the molecular chain movement ability, thereby improving the material toughness. Through the above-mentioned synergistic copolymerization modification method, the crystallization tendency of the PEN material can be effectively reduced, the obtained PEN thick product has excellent light transmittance and toughness at the same time, and is suitable for the preparation of high-performance transparent polyester products.

The embodiment of the invention provides a monocrystalline silicon drawing power automatic adjusting method and device, equipment and a medium, and relates to the technical field of monocrystalline silicon. Firstly, historical crystal pulling data is obtained; determining the reference power and the total offset of the single crystal furnace at the current process stage according to the historical crystal pulling data; and finally, determining a power adjustment strategy of the current process stage according to the reference power and the total offset. According to the method, accurate derivation of a power adjustment strategy is realized through historical crystal pulling data, a manual adjustment mode depending on subjective experience of operators is avoided, and the temperature stability in the single crystal furnace is effectively maintained, so that the stability of the crystal bar crystallization rate is guaranteed.

The present invention relates to the technical field of biodegradable materials, and in particular, to a novel foamed material, a method for preparing same, and use thereof. The foamed material at least comprises a crystalline PHA and an amorphous PHA. The foamed material prepared by the present invention features good foaming performance. It improves the poor thermal stability, narrow processing window, low crystallization rate, and high fragility of PHA materials while retaining the original advantages and performances of the PHA materials. Therefore, the foamed material of the present invention can meet the requirements for biodegradability and certain cushion performance in applications such as high-tech appliances, packaging materials of electronic equipment, sports shoe sole materials, carpet materials, soft package materials of automotive interiors, sewage treatment materials, medical microporous foamed materials, and the like.

The invention discloses a passivator for a solar cell, application of the passivator and the solar cell, and belongs to the technical field of solar cells. The passivator comprises one or more of compounds shown in the formula (I) and derivatives of the compounds, wherein R1-R10 are independently selected from hydrogen and fluorine; and Z is a monovalent anion of one of iodine, bromine, chlorine, fluorine, thiocyanate and trifluoromethanesulfonic acid ions. According to the passivator for the solar cell, the application of the passivator and the solar cell, the crystallization rate of a perovskite thin film can be effectively adjusted, the crystallization process is optimized, segregation of A-site cations in a perovskite layer is restrained, and the stability and performance of the cell are improved.

The invention discloses a preparation method of high-purity ammonium rhenate, which comprises the following steps: adding rhenium-rich slag and water into a high-pressure kettle, uniformly stirring, adding hydrogen peroxide, heating, pressurizing and leaching, precisely filtering after leaching, and standing to obtain a leaching solution; the leachate is treated through a four-stage anion exchange column, the saturated ion exchange column is resolved through high-quality ammonia water, and resolved liquid is purified and enriched ammonium rhenate liquid; and performing high-temperature thermal crystallization on the purified and enriched ammonium rhenate solution under the action of micro-pressure ultrasonic waves, performing centrifugal separation to obtain high-purity ammonium rhenate crystals, and performing high-temperature drying to obtain a high-purity ammonium rhenate product. The method is simple in process, and the prepared product is high in activity, high in crystallization rate and excellent in purity and has high application value.

The invention discloses a photovoltaic module, a preparation method thereof and a preparation method of an N-TOPCON battery piece, and belongs to the technical field of photovoltaic modules. A silicon oxide tunneling layer, a first phosphorus-doped N + POLY silicon layer, a second silicon oxide layer and a second phosphorus-doped N + POLY silicon layer are sequentially deposited on the back surface of an N-type silicon wafer; performing anaerobic high-temperature crystallization on the back surface to obtain a laminated N + POLY silicon layer structure; performing local laser high-temperature oxidation treatment on the emitter region in an oxygen atmosphere to form a compact silicon oxide layer; performing acid washing and alkali washing on the front and back surfaces to obtain an N-TOPCON battery piece, and further preparing to obtain a photovoltaic module. Through combination of anaerobic high-temperature crystallization and local laser high-temperature oxidation treatment, the crystallization rate of the phosphorus-doped N + POLY silicon layer is improved, so that the back emitter has a complete silicon oxide-POLY silicon-silicon oxide-POLY silicon structure, a non-emitter structure is silicon oxide-POLY silicon, and the efficiency of a photovoltaic module is obviously improved.

The invention belongs to the field of polymer compositions, and particularly discloses a PPS composite material for a vehicle electromagnetic valve coil assembly and a preparation method and application thereof.The composite material is prepared from, by weight, 55-65 parts of PPS resin, 30-40 parts of glass fibers, 4-6 parts of flexibilizer, 0.5-1 part of nucleating agent and 1-5 parts of other auxiliaries, the melt index of the PPS resin is 400-600 g / 10 min, and the melt index of the glass fibers is 100-200 g / 10 min. The nucleating agent is montmorillonite modified by adopting 2-methylimidazole zinc MOF (ZIF-8). Compared with the prior art, the composite material with a high melt index PPS formula is selected, so that the defects of processing deformation, air holes and the like of the coil assembly, which are easily caused when a corresponding processing technology is selected due to overhigh viscosity in the processing process of the coil assembly, are overcome. By selecting a special nucleating agent and modifying montmorillonite, the technical effect of controlling high crystallization rate and low crystallinity on one nucleating agent is realized. And the problem of flash caused by selection of high-melt-index PPS in the machining process is solved.

The invention relates to an anti-sticky polypropylene material and a preparation method thereof, and belongs to the technical field of high polymer materials. 2, 5-dimercaptothiadiazole and vinyl dibutyl borate are subjected to a mercapto-olefin Michael addition reaction and then subjected to a Michael addition reaction with erucyl amide, erucyl amide and boric acid ester can be grafted to a molecular chain with thiadiazole as a core, the branching degree of the molecular chain is increased, and the molecular chain can be grafted with erucyl amide and boric acid ester. The erucyl amide unit in the additive can play the roles of a crystal nucleating agent and a lubricant, improve the crystallization rate of polypropylene, improve the mechanical property, and migrate to the surface of polypropylene to form a uniform lubricating layer and reduce the friction and adhesion of a polypropylene chain; and the additive has a branched structure and can be firmly embedded in a polypropylene matrix, so that the durability is improved. And a borate unit and a thiadiazole unit in the additive can also play a lubricating role and an anti-aging role, so that the scratch resistance and the anti-aging performance of the polypropylene material are further improved.

This invention discloses a perovskite solar cell using a perfluorinated additive and its fabrication method. The cell comprises, from bottom to top, a substrate electrode, a hole transport layer, a perovskite light-absorbing layer, an electron transport layer, a hole blocking layer, and a metal electrode. The perovskite light-absorbing layer is prepared by dissolving a precursor material of the perovskite light-absorbing layer in a solvent and then adding a perfluorinated additive, wherein the perfluorinated additive is perfluorotoluene or perfluoronaphthalene. The precursor material of the perovskite light-absorbing layer is (FA... X MA Y Cs Z The perovskite crystals are PbI3, where X = 0.8~1.2, Y = 0.1~0.3, Z = 0.01~0.05, and X+Y+Z=1. This invention utilizes perfluorotoluene and perfluoronaphthalene to regulate the crystallization rate of perovskite crystals, thereby improving the wettability of the perovskite solution on a SAM substrate, enhancing the thermal stability of the perovskite film, adjusting the surface tension of the perovskite precursor solution, improving film quality and surface coverage, and ultimately increasing the photoelectric conversion efficiency of perovskite solar cells, enabling the fabrication of large-area perovskite solar cells.

The application designs and synthesizes a nucleating agent with good compatibility with recycled polyethylene terephthalate. The nucleating agent can effectively solve the technical problems of slow crystallization rate and poor heat resistance of recycled polyethylene terephthalate. The nucleating agent is simple to synthesize, has good effect, can effectively improve the crystallization temperature, crystallization rate and heat distortion temperature of recycled polyethylene terephthalate, and further promotes the wide application of recycled polyethylene terephthalate.

The application discloses an epitaxial growth template, a tin-based perovskite thin film and a tin-based perovskite solar cell, and belongs to the technical field of perovskite solar cells. The epitaxial growth template is prepared by the following method: stannous iodide, stannous fluoride, an organic ammonium salt containing a conjugated aromatic ring and tin powder are dissolved in a solvent, then the precursor solution is obtained by stirring for a period of time; the precursor solution is uniformly coated, then annealing is performed to obtain the epitaxial growth template. In view of the fast crystallization kinetics and disordered crystal orientation of the tin-based perovskite thin film, the epitaxial growth template is used to induce three-dimensional perovskite epitaxial growth, the crystallization rate of the tin-based perovskite is delayed, the (100) crystal face growth of the tin-based perovskite is promoted, the in-grain defect state density is minimized, uniform tin-based perovskite thin films are formed in a larger range, and finally the photoelectric conversion efficiency of the tin-based perovskite solar cell is improved.

The present application belongs to the technical field of polyester nucleating agent, and particularly relates to a kind of universally applicable polyester nucleating agent and its preparation method. A series of furan diacyl hydrazine thermoplastic polyester nucleating agents are prepared by using furfuryl chloride, a derivative of furfural, and on this basis, a heat-resistant polyester composition is prepared by melt blending according to the mass ratio of 100 parts of polyester, 0.3-1 parts of nucleating agent, which can significantly improve the heat resistance and transparency of polyester plastic products. The nucleating agent has a wide source of raw materials, a simple preparation process, can effectively improve the crystallization rate of polyester, and has good industrialization prospect.

This invention provides a wide-bandgap perovskite thin film, a perovskite tandem solar cell, and a method for preparing the same, relating to the field of photovoltaic technology. The method for preparing the perovskite thin film includes: adding a perovskite structural material and an organic additive to an organic solvent to obtain a perovskite precursor solution; spin-coating the perovskite precursor solution onto a substrate; and annealing the substrate to obtain the perovskite thin film. The organic additive includes a material containing a thiophene dioxide framework. The organic additive used in this invention can effectively regulate the crystallization rate of mixed halides, delay crystallization, enhance the uniform distribution of the mixed halide phase, reduce the defect density in the wide-bandgap perovskite thin film, and significantly improve the power conversion efficiency and stability of the solar cell, thereby obtaining a high-performance tandem solar cell.

The application discloses a production process of high-quality electroplating-grade nickel sulfate large-particle crystals, and relates to the technical field of preparation of nickel sulfate.The process measures, such as precisely controlling the concentration degree of nickel sulfate solution and the crystallization temperature, improving the saturation of the solution, adjusting the crystal structure transformation and the like, are adopted to promote the growth of large particles to form the large-particle crystals.The nickel sulfate crystals can meet the electroplating industry standards.The concentrated nickel sulfate solution is conveyed to a crystallizer through a pipeline, and the crystallizer is cooled by circulating cooling water, so that small crystals are formed by preliminary crystallization, and the small crystals are used as crystal seeds to grow into large particles in the crystallizer.The organic solvent with weak polarity is selected as a crystallizing agent to differentiate the crystal water in the nickel sulfate molecules, promote the generation and precipitation of the crystals, and improve the crystallization rate.The nickel-cobalt hydroxide raw material is subjected to ozone oxidation treatment and pH adjustment, so that the impurities in the nickel solution are separated and graded, and the subsequent wastewater treatment process is simplified.

This invention relates to the field of phase change energy storage materials technology, specifically to a high-energy-storage composite phase change material for low-temperature applications and its preparation method. Addressing the problems of high supercooling, slow crystallization rate, and poor heat transfer performance in existing low-temperature phase change materials, this invention uses a glycylglycine aqueous system as the high-energy-storage matrix, introduces organic sugar alcohols as phase change temperature regulators, and constructs heterogeneous nucleation sites by adding inorganic nanoparticles. These nanoparticles significantly reduce the nucleation energy barrier of the system, effectively suppressing supercooling and improving the internal heat transfer efficiency of the material. The material obtained by this invention crystallizes rapidly and releases heat efficiently, making it widely applicable in cold chain logistics and food preservation.

This application provides an AI-based thermal field control method and system, relating to the field of Czochralski crystal growth. The method includes: collecting operational data of the preparation system; determining the target power of multiple heaters based on the operational data and a pre-trained thermal field control model; wherein the thermal field control model is pre-optimized to achieve the goals of oxygen reduction, crystal optimization, and energy saving through a reward function; and controlling multiple heaters based on the target power of the multiple heaters. By introducing a pre-optimized thermal field control model obtained through a multi-objective reward function, this application unifies the mutually restrictive process objectives of oxygen reduction, crystal optimization, and energy saving under a single optimization framework, achieving multi-objective dynamic coordination and adaptive control. This significantly reduces the oxygen content of the crystal, improves the crystallization rate and crystal quality, and reduces system energy consumption.

The present application belongs to the technical field of perovskite battery manufacturing. The present application provides a drying method of wet film, and a system device for drying wet film. The drying method comprises loading a to-be-dried substrate with a wet film formed thereon into a flower basket and transferring the substrate into a drying chamber through a transmission mechanism, and controlling the wet film to face upwards and remain horizontal during the loading and transferring process. Then, a plurality of gas pipelines are used for respectively performing air extraction and air supply to dry the wet film. The present application cooperates the flower basket and the transmission mechanism to constrain the horizontal posture of the substrate during the loading and moving process, which is conducive to maintaining the initial state of the wet film stable and consistent. Further, the cooperative drying mode of air extraction and air supply is conducive to achieving a more optimal pressure and atmosphere environment, effectively avoiding the drying process out of control. Therefore, the drying method can significantly improve the uniformity of crystal size and the crystallization rate.

The application discloses a method for quantifying and analyzing the amorphization rate of precipitates in steel materials, and belongs to the technical field of material irradiation damage analysis. The method is based on obtaining corresponding transmission electron microscope dark field images of steel material samples under multiple different irradiation doses, identifying the ROI of the two-dimensional projection area of the precipitates, extracting the amorphous area, calculating the relative amorphization fraction, fitting the evolution relationship of the relative amorphization fraction with the dose D, and extracting the characteristic dose corresponding to the preset relative amorphization fraction as the amorphization rate index. The quantitative comparison of the amorphization behavior of the precipitates under different variables such as temperature, size and irradiation conditions can be realized, and the method is suitable for the research on irradiation damage and structural stability.

The invention relates to the technical field of pharmaceutical preparations, in particular to a method for predicting the influence of a surfactant on the crystallization rate of an amorphous drug, and the method comprises the steps of sample preparation and glass transition temperature determination, during sample preparation, an insoluble amorphous drug is selected as a model drug, the surfactant and the model drug are mixed according to a set proportion, and the glass transition temperature is measured. The glass-transition temperature determination comprises the following steps: respectively determining the glass-transition temperature Tg1 of a surfactant-containing sample and the glass-transition temperature Tg0 of a blank control group sample by adopting a differential scanning calorimeter (DSC); key data can be obtained only through DSC testing, the DSC testing is short in single experiment period, a complex real-time observation system does not need to be built or long-term stability monitoring does not need to be carried out, and compared with a several-day experiment period of a traditional direct measurement method and a several-month observation period of a long-term crystallographic detection method, the detection efficiency is improved, and the detection cost is reduced. And data support can be quickly provided for prescription screening, and the research and development period of the insoluble drug solid dispersion is greatly shortened.

The invention provides a PEF hydrogen bond reinforced modified polyester material and a preparation method thereof, and the preparation method comprises the following steps: blending 2, 5-furandicarboxylic acid and a third monomer hydroxy acid, and copolymerizing under the action of ethylene glycol to synthesize bio-based furan polyester, namely the PEF hydrogen bond reinforced modified polyester material. The introduced hydroxyl is used as a hydrogen bond donor to enhance the PEF copolyester material, so that the interaction strength and the chain stacking density between PEF chains are improved, the toughness, the melt strength and the crystallization rate of PEF can be improved by only adding a small amount of hydroxyl, and the barrier property of PEF copolyester is maintained to be more than 5 times of that of PET (Polyethylene Terephthalate).