CN112940241B - Triazine polymer and preparation method thereof - Google Patents
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Abstract
The application belongs to the technical field of triazine polymers, and relates to a triazine polymer and a preparation method thereof, wherein a compound containing a triazine ring is mixed with polyol sodium salt, and the triazine polymer is obtained by performing polycondensation reaction through a Williamson ether synthesis method and washing; the triazine ring-containing compound includes a halogenated s-triazine compound including trichlorozine or 2-hydroxy-4, 6-dichloro-s-triazine; the prepared triazine polymer has excellent phosphorescence quantum yield, longer phosphorescence service life and unique luminescence property, good long afterglow property in high temperature environment, and the special long chain entanglement structure of the polymer is utilized to limit the non-radiation process, so that the decay speed of the afterglow service life along with the environmental temperature is greatly slowed down; the triazine polymer can be used for photoelectric functional materials, can also be used as an organic chemical intermediate, and has wide application in the fields of multiple encryption, anti-counterfeiting and the like.
Description
Technical Field
The application belongs to the technical field of triazine polymers, and particularly relates to a triazine polymer and a preparation method thereof.
Background
The s-triazine ring is a benzene-like ring-like compound having aromaticity, which is composed of 3 carbon atoms and 3 nitrogen atoms alternately. The electron cloud density on the s-triazine ring is higher than that of the benzene ring due to the influence of the nitrogen atom lone pair electrons, so that the photoelectric performance of the compound is stronger, and the compound with the s-triazine ring structure is expansively applied to the field of organic photoelectricity.
For example, patent CN201611206304.9 discloses a triazine-based compound and an organic electroluminescent device thereof, and carbazole with a substituent group is connected to the s-triazine ring, so that a material with electroluminescent performance can be obtained. On the other hand, other modifying groups can be attached to three carbon atoms of the s-triazine ring, and the s-triazine is of a highly symmetrical structure, so that after linking the same groups at three positions, coupling can be performed, thereby obtaining a crosslinked network polymer, as described in patent CN 201510133998.7. However, the existing organic long afterglow materials are all based on carbazole or imide compounds, and the compounds are characterized by being basically fat-soluble and low in solubility in water or alcohol solvents, so that a large amount of organic solvents are required for production and treatment.
Three different modification groups are linked at three positions of the s-triazine, so that different influences can be generated on the s-triazine ring, the performance of the finally obtained luminescent material is accurately adjusted, the application field of the finally obtained luminescent material is expanded, however, under the influence of the luminescence mechanism of the existing organic long afterglow material, the phosphorescence emission process is greatly influenced by the ambient temperature, and many materials cannot show special properties at the temperature higher than the room temperature, and the conditions of insufficient afterglow characteristics, application limitation and the like exist.
Disclosure of Invention
In order to solve the above problems, the present application aims to provide a triazine polymer and a preparation method thereof, wherein a triazine ring-containing compound and a polyol sodium salt are adopted to perform polycondensation reaction by a Williamson ether synthesis method to obtain the triazine polymer, which has excellent phosphorescence quantum yield and can generate high-intensity long afterglow phosphorescence emission in an environment with high temperature (more than or equal to 50 ℃).
The technical content of the application is as follows:
the application provides a preparation method of triazine polymer, which comprises the following steps: mixing a compound containing a triazine ring with a polyol sodium salt for reaction, performing polycondensation reaction through a Williamson ether synthesis method, and washing to obtain a triazine polymer;
the triazine ring-containing compound includes a halogenated s-triazine compound including trichlorozine or 2-hydroxy-4, 6-dichloro-s-triazine; the preparation of the 2-hydroxy-4, 6-dichloro-s-triazine comprises the following steps: hydrolyzing the trichlorozine in a sodium bicarbonate-sodium carbonate buffer solution (pH is 8.0-8.5) at 50 ℃, wherein the sodium bicarbonate-sodium carbonate buffer solution is obtained by mixing sodium bicarbonate with a sodium carbonate buffer solution at a ratio of 2:1;
the polyol sodium salt comprises disodium salts of diol, is prepared by adopting a mixing reaction of a hydroxyl-terminated dihydric alcohol compound and solid sodium hydride, and has a mixing ratio of 1: (2.5-5.0), wherein the reaction condition is that under the ice bath condition, the adopted reaction solvent comprises one of anhydrous 1, 4-dioxane, anhydrous tetrahydrofuran and anhydrous dimethyl sulfoxide;
compared with the disodium glycol salt, the glycol disodium salt increases the functionality of glycol compounds, so that the polymer phosphorescent material with the s-triazine ring is obtained, and compared with the s-triazine monomer molecules, the phosphorescent quantum yield of the polymer is improved, and the long afterglow phosphorescent emission with higher intensity can be generated at higher temperature.
The structure of the hydroxyl-terminated diol compound is as follows:
wherein R is 1 The structure of (C) comprises alkyl groups containing 2-6 carbon atoms and polyether chains (-CH) 2 O-) n Or aryl;
further, the hydroxyl-terminated diol compound comprises one of propylene glycol, butanediol, ethylene glycol, diphenol and polyether glycol, and is not limited to the above;
the mixing ratio of the triazine ring-containing compound to the polyol sodium salt is 1: (0.08-1.5);
the reaction conditions of the mixing reaction comprise a dry and airtight environment, and the reaction temperature is 25-35 ℃;
the washed reagent comprises tetrahydrofuran and deionized water, and is washed separately.
The application also provides the triazine polymer prepared by the preparation method;
the triazine polymer comprises alpha, omega-dihydroxypoly-2-hydroxy-4, 6-alkyl ether s-triazine and alpha, omega-dihydroxypoly-2-halogen-4, 6-alkyl ether s-triazine.
The alpha, omega-dihydroxyl poly-2-hydroxy-4, 6-alkyl ether s-triazine has the structure:
wherein the structure of R comprises an alkyl group containing 2 to 6 carbon atoms, a polyether chain (-CH) 2 O-) n Or one of aryl groups;
the preparation method comprises the following steps: mixing 2-hydroxy-4, 6-dichloro s-triazine with disodium glycol salt in a ratio of 1: (1.2-1.5) mixing and reacting to obtain the target product alpha, omega-dihydroxyl poly 2-hydroxy-4, 6-alkyl ether sym-triazine crude product, and washing to obtain the pure alpha, omega-dihydroxyl poly 2-hydroxy-4, 6-alkyl ether sym-triazine product.
The alpha, omega-dihydroxyl poly 2-halogen-4, 6-alkyl ether s-triazine comprises alpha, omega-dihydroxyl poly 2-chlorine-4, 6-alkyl ether s-triazine, and the structure is as follows:
wherein the structure of R comprises an alkyl group containing 2 to 6 carbon atoms, a polyether chain (-CH) 2 O-) n Or one of aryl groups;
the preparation method comprises the following steps: mixing the trichlorozine with disodium salts of glycol to obtain a mixture of 1: (0.08-0.15) mixing and reacting to obtain the target product alpha, omega-dihydroxyl poly 2-chloro-4, 6-alkyl ether sym-triazine crude product, and washing to obtain the pure alpha, omega-dihydroxyl poly 2-chloro-4, 6-alkyl ether sym-triazine product.
The beneficial effects of the application are as follows:
the triazine polymer preparation method adopts a compound containing triazine rings and polyhydric alcohol sodium salt to carry out polycondensation reaction through a Williamson ether synthesis method to obtain a polymer phosphorescent material-triazine polymer with s-triazine rings, the prepared triazine polymer has excellent phosphorescent quantum yield, and can generate high-strength long-afterglow phosphorescent emission in a high-temperature (more than or equal to 50 ℃) environment, the characteristic expands the working temperature range of the long-afterglow material, so that the application of the long-afterglow material is expanded, and novel functional materials such as illumination, anti-counterfeiting, encryption and the like can be manufactured by utilizing the long afterglow characteristic in a high-temperature environment;
the triazine polymer has longer phosphorescence service life and unique luminescence property, still has good long afterglow property in a high-temperature environment, and greatly slows down the decay speed of the afterglow service life along with the environmental temperature by utilizing the limitation of a special long-chain entanglement structure of the polymer on a non-radiation process; the triazine polymer can be used for photoelectric functional materials, can also be used as an organic chemical intermediate, and has wider application in the fields of multiple encryption, anti-counterfeiting and the like.
Drawings
FIG. 1 is a nuclear magnetic resonance hydrogen spectrum of the α, ω -dihydroxy poly 2-hydroxy-4, 6-ethyl ether s-triazine of example 1;
FIG. 2 is an infrared absorption spectrum of α, ω -dihydroxy poly 2-hydroxy-4, 6-ethyl ether s-triazine of example 1;
FIG. 3 is a graph of the steady state emission spectrum of the α, ω -dihydroxy poly 2-hydroxy-4, 6-ethyl ether s-triazine of example 1;
FIG. 4 is a graph of the transient phosphorescence spectrum of the α, ω -dihydroxy poly 2-hydroxy-4, 6-ethyl ether s-triazine of example 1;
FIG. 5 is a graph of the phosphorescence attenuation of the α, ω -dihydroxy poly 2-hydroxy-4, 6-ethyl ether s-triazine of example 1;
FIG. 6 is a schematic representation of the afterglow luminescence at 50℃of the α, ω -dihydroxy poly 2-hydroxy-4, 6-ethyl ether s-triazine of example 1;
FIG. 7 is a schematic diagram showing afterglow luminescence at 50℃of the synthesis method of α, ω -dihydroxy poly 2-hydroxy-4, 6-ethyl ether s-triazine of example 1;
FIG. 8 is a schematic representation of the afterglow of example 1 at 50℃versus time for an α, ω -dihydroxy poly 2-hydroxy-4, 6-ethyl ether s-triazine;
FIG. 9 is a nuclear magnetic resonance hydrogen spectrum of the α, ω -dihydroxy poly 2-chloro-4, 6-ethyl ether s-triazine of example 3;
FIG. 10 is an infrared absorption spectrum of α, ω -dihydroxy poly 2-chloro-4, 6-ethyl ether s-triazine of example 3;
FIG. 11 is a graph of the steady state emission spectrum of the α, ω -dihydroxy poly 2-chloro-4, 6-ethyl ether s-triazine of example 3;
FIG. 12 is a graph of the transient phosphorescence spectrum of the α, ω -dihydroxy poly 2-chloro-4, 6-ethyl ether s-triazine of example 3;
FIG. 13 is a graph of the phosphorescence attenuation of the α, ω -dihydroxy poly 2-chloro-4, 6-ethyl ether s-triazine of example 3;
FIG. 14 is a schematic representation of the afterglow luminescence of the α, ω -dihydroxy poly 2-chloro-4, 6-ethyl ether s-triazine of example 3;
FIG. 15 is a schematic representation of the afterglow of the α, ω -dihydroxy poly 2-chloro-4, 6-ethylether s-triazine of example 3 as a function of time from luminescence to disappearance.
Detailed Description
The application is described in further detail below with reference to specific embodiments and the accompanying drawings, it being understood that these embodiments are only for the purpose of illustrating the application and not for the purpose of limiting the same, and that various modifications of the application, which are equivalent to those skilled in the art, will fall within the scope of the appended claims after reading the present application.
All materials and reagents of the application are materials and reagents of the conventional market unless specified otherwise.
Example 1
Triazine polymer and preparation thereof:
1) S-triazine containing compounds: adding the trichlorozine into sodium bicarbonate-sodium carbonate buffer solution (pH of 8.0) to hydrolyze at 50 ℃ to obtain 2-hydroxy-4, 6-dichloro-s-triazine;
the sodium bicarbonate-sodium carbonate buffer solution is obtained by mixing sodium bicarbonate and sodium carbonate buffer solution in a ratio of 2:1;
2) Glycol disodium salt: adding glycol into a reaction solvent of 1, 4-dioxane, mixing and stirring, putting into an ice bath after complete dissolution, and adding NaH in batches after the reaction liquid is cooled to 0 ℃, wherein the ratio of the glycol to the NaH is 1:2.5, reacting until no bubbles are generated;
3) Triazine-based polymers: and (3) in a dry and airtight environment at 25 ℃, mixing 2-hydroxy-4, 6-dichloro-s-triazine with diol disodium salt for reaction at a ratio of 1:1.2, reacting at room temperature for 48 hours to obtain a white turbid liquid, centrifuging the mixture to obtain a target product alpha, omega-dihydroxy poly-2-hydroxy-4, 6-alkyl ether-s-triazine crude product, washing the raw materials and oligomers by adopting tetrahydrofuran and deionized water respectively, and obtaining a pure flaky white alpha, omega-dihydroxy poly-2-hydroxy-4, 6-alkyl ether-s-triazine product.
After the polymer product-alpha, omega-dihydroxyl poly-2-hydroxy-4, 6-alkyl ether sym-triazine obtained in the example 1 is dried, obvious afterglow phenomenon can be generated under 365nm ultraviolet light;
as shown in fig. 1, the nuclear magnetic resonance hydrogen spectrum 1H NMR (600 mhz, cd3od_spe) δ 8.51,3.58, the peak at δ=8.51 is the nuclear magnetic peak of α, ω -dihydroxy poly 2-hydroxy-4, 6-ethyl ether s-triazine, and the nuclear magnetic peak of hydrogen on α, ω -dihydroxy poly 2-hydroxy-4, 6-ethyl ether s-triazine methylene at δ=3.58;
as shown in the infrared absorption spectrum of fig. 2, a hydroxyl group: 3488cm -1 Methylene C-H:3000cm -1 Intra-ring c=n bond: 3100cm -1 、1360cm -1 Methylene, methylene: 1455cm -1 Combining nuclear magnetic resonance hydrogen spectrum data to confirm the existence of main functional groups of alpha, omega-dihydroxyl poly-2-hydroxy-4, 6-ethyl ether sym-triazine, which shows that the alpha, omega-dihydroxyl poly-2-hydroxy-4, 6-ethyl ether sym-triazine is synthesized;
as shown in fig. 3, under room temperature air condition, the excitation light wavelength of the obtained alpha, omega-dihydroxyl poly-2-hydroxy-4, 6-ethyl ether s-triazine is 365nm, the maximum steady state fluorescence emission peak wavelength is 446nm, and under 365nm excitation light excitation, the steady state fluorescence of the alpha, omega-dihydroxyl poly-2-hydroxy-4, 6-ethyl ether s-triazine appears blue;
as shown in fig. 4, under room temperature air condition, the excitation light wavelength of the obtained alpha, omega-dihydroxyl poly-2-hydroxy-4, 6-ethyl ether s-triazine is 365nm, the maximum transient phosphorescence emission peak wavelength is 541nm, and under 365nm excitation light excitation, the transient phosphorescence of the alpha, omega-dihydroxyl poly-2-hydroxy-4, 6-ethyl ether s-triazine appears green;
as shown in FIG. 5, in the air at room temperature and 50 ℃, the excitation light wavelength of the obtained alpha, omega-dihydroxyl poly-2-hydroxy-4, 6-ethyl ether s-triazine is 365nm, the phosphorescence attenuation spectrum at the detection wavelength of 541nm, the phosphorescence lifetime at room temperature is 285.58ms, and the phosphorescence lifetime at 50 ℃ is 230.93ms, which indicates that the phosphorescence lifetime still keeps good at high temperature;
the graph in FIG. 6 shows that the obtained alpha, omega-dihydroxyl poly-2-hydroxy-4, 6-ethyl ether s-triazine shows green light after ultraviolet light irradiation at 365nm, and the graph in the left is that an ultraviolet lamp is turned off, so that the alpha, omega-dihydroxyl poly-2-hydroxy-4, 6-ethyl ether s-triazine has an afterglow luminescence phenomenon, and the afterglow luminescence phenomenon shows that the alpha, omega-dihydroxyl poly-2-hydroxy-4, 6-ethyl ether s-triazine has a long afterglow property at room temperature;
as shown in FIG. 7, in the air at 50 ℃, the obtained alpha, omega-dihydroxyl poly-2-hydroxy-4, 6-ethyl ether s-triazine is excited by 365nm ultraviolet light, the left image shows ultraviolet light irradiation, the right image shows green light after an ultraviolet lamp is turned off, and the visible afterglow can be shown, so that the fluorescent lamp has high-temperature long afterglow characteristics;
as shown in FIG. 8, the afterglow of the obtained α, ω -dihydroxy poly-2-hydroxy-4, 6-ethyl ether s-triazine shows a schematic view showing the change of afterglow from luminescence to disappearance at 50℃with time, and the afterglow appears green for about 2.2s, indicating that the remaining glow characteristic is relatively continuous.
Example 2
Triazine polymer and preparation thereof:
1) S-triazine containing compounds: adding the trichlorozine into sodium bicarbonate-sodium carbonate buffer solution (pH of 8.5) at 50 ℃ for hydrolysis to obtain 2-hydroxy-4, 6-dichloro-s-triazine;
the sodium bicarbonate-sodium carbonate buffer solution is obtained by mixing sodium bicarbonate and sodium carbonate buffer solution in a ratio of 2:1;
2) Glycol disodium salt: adding propylene glycol into anhydrous tetrahydrofuran serving as a reaction solvent, mixing and stirring, putting into an ice bath after the propylene glycol is completely dissolved, and adding NaH in batches after the reaction liquid is cooled to 0 ℃, wherein the ratio of the propylene glycol to the NaH is 1:3, and reacting until no bubbles are generated;
3) Triazine-based polymers: and (3) in a dry and airtight environment at 35 ℃, mixing 2-hydroxy-4, 6-dichloro-s-triazine with diol disodium salt for reaction at a ratio of 1:1.3, reacting at room temperature for 48 hours to obtain a white turbid liquid, centrifuging the mixture to obtain a target product alpha, omega-dihydroxy poly-2-hydroxy-4, 6-alkyl ether-s-triazine crude product, washing the raw materials and oligomers by adopting tetrahydrofuran and deionized water respectively, and obtaining a pure flaky white alpha, omega-dihydroxy poly-2-hydroxy-4, 6-alkyl ether-s-triazine product.
Example 3
Triazine polymer and preparation thereof:
1) Glycol disodium salt: adding polyether glycol into a reaction solvent 1, 4-dioxane, mixing and stirring, putting into an ice bath after the polyether glycol is completely dissolved, and adding NaH in batches after the reaction liquid is cooled to 0 ℃, wherein the ratio of the polyether glycol to the NaH is 1:3.5, and reacting until no bubbles are generated;
2) Triazine-based polymers: and (3) in a dry and airtight environment at 25 ℃, mixing and reacting the trichlorozine and the diol disodium salt in a ratio of 1:0.08, reacting for 48 hours at room temperature to obtain a white turbid liquid, centrifuging and separating the mixture to obtain a target product alpha, omega-dihydroxyl poly 2-chloro-4, 6-ethyl ether sym-triazine crude product, respectively adopting tetrahydrofuran and deionized water for washing, and washing away raw materials and oligomers to obtain a pure flaky white alpha, omega-dihydroxyl poly 2-chloro-4, 6-ethyl ether sym-triazine product.
The α, ω -dihydroxy poly 2-chloro-4, 6-ethyl ether s-triazine obtained in example 3 was subjected to nuclear magnetic resonance hydrogen spectrum detection, and the result is shown in fig. 9, and the nuclear magnetic resonance hydrogen spectrum 1H NMR (600 mhz, cd3od_spe) δ 3.77.δ=3.77 was the nuclear magnetic peak of the methylene hydrogen of the α, ω -dihydroxy poly 2-chloro-4, 6-ethyl ether s-triazine, as shown in fig. 9;
as shown in the infrared absorption spectrum of fig. 10, a hydroxyl group: 3495cm -1 Methylene C-H:2988cm -1 Intra-ring c=n bond: 1461cm -1 ，C-Cl：660cm -1 Combining the nuclear magnetic hydrogen spectrum data and combining the nuclear magnetic hydrogen spectrum data to prove the existence of main functional groups of the alpha, omega-dihydroxyl poly-2-chloro-4, 6-ethyl ether s-triazine, which shows that the alpha, omega-dihydroxyl poly-2-chloro-4, 6-ethyl ether s-triazine is synthesized;
as shown in fig. 11, under room temperature air condition, the excitation light wavelength of the obtained α, ω -dihydroxy poly 2-chloro-4, 6-ethyl ether s-triazine is 365nm, the maximum steady state fluorescence emission peak wavelength is 445nm, and under 365nm excitation light excitation, the steady state fluorescence of the α, ω -dihydroxy poly 2-chloro-4, 6-ethyl ether s-triazine appears blue;
as shown in fig. 12, under room temperature air condition, the excitation light wavelength of the obtained α, ω -dihydroxy poly 2-chloro-4, 6-ethyl ether s-triazine is 365nm, the maximum transient phosphorescence emission peak wavelength is 512nm, and under 365nm excitation light excitation, the transient phosphorescence of the α, ω -dihydroxy poly 2-chloro-4, 6-ethyl ether s-triazine appears blue-green;
as shown in fig. 13, under room temperature air condition, the excitation light wavelength of the obtained α, ω -dihydroxy poly 2-chloro-4, 6-ethyl ether s-triazine is 365nm, and the phosphorescence attenuation spectrum at 500nm is detected, and the room temperature phosphorescence lifetime is 148.14ms, which indicates that the phosphorescence lifetime is kept good;
the graph in FIG. 14 shows that the obtained alpha, omega-dihydroxyl poly-2-chloro-4, 6-ethyl ether s-triazine shows green light after ultraviolet light irradiation at 365nm, and the graph in the left is that an ultraviolet lamp is turned off, so that the alpha, omega-dihydroxyl poly-2-chloro-4, 6-ethyl ether s-triazine has an afterglow luminescence phenomenon, and the afterglow luminescence phenomenon shows that the alpha, omega-dihydroxyl poly-2-chloro-4, 6-ethyl ether s-triazine has a long afterglow property at room temperature;
as shown in FIG. 15, the afterglow of the obtained α, ω -dihydroxy poly-2-chloro-4, 6-ethyl ether s-triazine shows a schematic view showing the change of afterglow from luminescence to disappearance of the same with time under the air condition of room temperature, and the afterglow appears green for about 1.4s, indicating that the remaining glow characteristic is relatively continuous.
Example 4
Triazine compound and preparation thereof:
1) Glycol disodium salt: adding diphenol into anhydrous dimethyl sulfoxide serving as a reaction solvent, mixing and stirring, putting into an ice bath after the diphenol is completely dissolved, and adding NaH in batches after the reaction liquid is cooled to 0 ℃, wherein the ratio of the diphenol to the NaH is 1:5.0, and reacting until no bubbles are generated;
3) Triazine-based polymers: and (3) mixing and reacting the trichlorooxazine and the diol disodium salt in a ratio of 1:0.15 in a dry and airtight environment at 30 ℃ for 48 hours at room temperature to obtain a white turbid liquid, centrifuging the mixture to obtain a target product alpha, omega-dihydroxyl poly 2-chloro-4, 6-alkyl ether sym-triazine crude product, and washing the raw materials and the oligomers by adopting tetrahydrofuran and deionized water to remove the raw materials and the oligomers respectively to obtain a pure flaky white alpha, omega-dihydroxyl poly 2-chloro-4, 6-alkyl ether sym-triazine product.
As is clear from the above, compared with triazine single molecules, all the orbital energy levels of the molecules of the triazine polymer are improved, but the triplet energy level of the polymer is improved less, so that the triazine polymer has larger deltaEst, and the RISC process is weakened, so that the phosphorescence quantum yield is improved. On the other hand, because the polymer has a special curly entanglement structure, non-radiative processes such as molecular thermal motion and the like are still well inhibited at higher temperature, and therefore, long persistence phosphorescence emission with higher intensity can be generated at higher temperature.
Claims (2)
1. A method for preparing triazine polymer, which is characterized by comprising the following steps:
1) S-triazine containing compounds: adding the trichlorozine into sodium bicarbonate-sodium carbonate buffer solution for hydrolysis at 50 ℃ to obtain 2-hydroxy-4, 6-dichloro-s-triazine;
the sodium bicarbonate-sodium carbonate buffer solution is obtained by mixing sodium bicarbonate and sodium carbonate in a ratio of 2:1, and the pH value is 8.0;
2) Glycol disodium salt: adding glycol into a reaction solvent of 1, 4-dioxane, mixing and stirring, putting into an ice bath after complete dissolution, and adding NaH in batches after the reaction liquid is cooled to 0 ℃, wherein the ratio of the glycol to the NaH is 1:2.5, reacting until no bubbles are generated;
3) Triazine-based polymers: and (3) in a dry and airtight environment at 25 ℃, mixing 2-hydroxy-4, 6-dichloro-s-triazine with diol disodium salt for reaction at a ratio of 1:1.2, reacting at room temperature for 48 hours to obtain a white turbid liquid, centrifuging the mixture to obtain a target product alpha, omega-dihydroxy poly-2-hydroxy-4, 6-alkyl ether-s-triazine crude product, washing the raw materials and oligomers by adopting tetrahydrofuran and deionized water respectively, and obtaining a pure flaky white alpha, omega-dihydroxy poly-2-hydroxy-4, 6-alkyl ether-s-triazine product.
2. A triazine polymer prepared by the preparation method of claim 1, comprising the steps of:
1) S-triazine containing compounds: adding the trichlorozine into sodium bicarbonate-sodium carbonate buffer solution for hydrolysis at 50 ℃ to obtain 2-hydroxy-4, 6-dichloro-s-triazine;
the sodium bicarbonate-sodium carbonate buffer solution is obtained by mixing sodium bicarbonate and sodium carbonate in a ratio of 2:1, and the pH value is 8.0;
2) Glycol disodium salt: adding glycol into a reaction solvent of 1, 4-dioxane, mixing and stirring, putting into an ice bath after complete dissolution, and adding NaH in batches after the reaction liquid is cooled to 0 ℃, wherein the ratio of the glycol to the NaH is 1:2.5, reacting until no bubbles are generated;
3) Triazine-based polymers: and (3) in a dry and airtight environment at 25 ℃, mixing 2-hydroxy-4, 6-dichloro-s-triazine with diol disodium salt for reaction at a ratio of 1:1.2, reacting at room temperature for 48 hours to obtain a white turbid liquid, centrifuging the mixture to obtain a target product alpha, omega-dihydroxy poly-2-hydroxy-4, 6-alkyl ether-s-triazine crude product, washing the raw materials and oligomers by adopting tetrahydrofuran and deionized water respectively, and obtaining a pure flaky white alpha, omega-dihydroxy poly-2-hydroxy-4, 6-alkyl ether-s-triazine product.
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