Polyester trifunctional modification aid, preparation method and application thereof

Abstract

The application relates to a polyester three-effect functional modification aid, a preparation method and application thereof, and the scheme comprises the following steps: synthesizing monolayer MoS2 nanosheets through a space confinement method, mixing the monolayer MoS2 nanosheets with a glycol solution, adding benzenedicarboxylic acid dihydroxy diethyl ester-5-sodium sulfonate grafting reaction, and obtaining the aid through post-treatment. The parameters of each step in the aid preparation method are clear, and high monolayer rate nanosheet synthesis and effective grafting can be ensured. The aid can be dispersed in various polymer liquid monomer media, and functional polymer nanocomposites can be synthesized through in-situ polymerization. The problems of single function and poor dispersibility of existing polyester functional modification aids are solved, the polyester material is endowed with the three-effect functions of light-heat, antibiosis and original liquid coloring, is suitable for modification of various polyester and related polymer materials, realizes product upgrading on the basis of not changing existing processes, widens an application market, improves product added value, and has important industrial application value and market prospect.

Description

Technical Field

[0001] This invention relates to a polyester functional modification agent, specifically to a polyester three-effect functional modification agent, its preparation method and its application, which can realize functional modification of polyester materials such as antibacterial, photothermal and solution coloring. Background Technology

[0002] Polyester products are diverse, including polyethylene terephthalate (PET), polybutylene adipate / terephthalate (PET), polyurethane, and polyamide. They possess significant advantages such as excellent mechanical properties, good chemical stability, ease of processing, and low cost. As a result, they are widely used in numerous fields, including textiles for clothing fabrics; packaging for various packaging materials to ensure product storage and transportation; coatings for providing protection and special properties to object surfaces; and engineering plastics for the manufacture of various engineering components.

[0003] With social development and improved living standards, the limitations of traditional polyester materials, with their singular function, have become increasingly apparent, failing to meet the ever-evolving demands of consumers. This has led to a series of problems for polyester materials: large production volumes but severe homogenization, a limited variety and small proportion of high-functionality products, and difficulty in meeting high-end market requirements in terms of quality. Consequently, industry profit margins are low, and there is overcapacity. For example, in the current market, many polyester products have similar functions, lacking differentiated competitive advantages and failing to meet consumer demand for polyester products with special functions such as antibacterial and heat-insulating properties. This results in fierce market competition and squeezed profit margins for companies.

[0004] During the synthesis or processing of polyester, by adding appropriate functionalizing agents, polymers can be endowed with many special functionalities, such as antibacterial and photothermal properties. This results in products possessing superior performance and advanced functions, enabling high-value-added precision manufacturing of polymer products to meet the diverse applications of polyester materials in fields such as thermal insulation equipment, medical devices, and agricultural production. For example, in thermal insulation equipment, polyester materials with photothermal properties can absorb solar energy and convert it into heat energy to provide warmth to users; in medical devices, antibacterial polyester materials can effectively prevent bacterial growth, ensuring a safe medical environment.

[0005] Currently available polyester functional modifiers include ZnO, TiO2, and Ag2O nanoparticles, but they have several drawbacks. These modifiers often have a single function and cannot simultaneously meet multiple functional requirements. For example, nano-ZnO antibacterial modifiers only provide antibacterial functions and cannot offer other functions such as photothermal effects. Furthermore, they require large amounts, which not only increases production costs but may also adversely affect the original properties of the material. They also have poor dispersibility, making it difficult to disperse uniformly in the polymer matrix, leading to uneven material properties. In addition, they lack high-temperature stability; during some high-temperature processing, the properties of the modifiers may change, seriously affecting subsequent processing, production, and application.

[0006] For example, the cesium tungsten bronze nanoparticle photothermal modification agent disclosed in patent CN202410342107.8 suffers from problems such as large addition amounts, high costs, and difficulty in scaling up production applications, which limits its application in large-scale industrial production. The nano-ZnO antibacterial functional modification agent reported in patent CN116262989A suffers from problems such as single product function, difficulty in dyeing, and poor nanoparticle dispersion, which greatly limits its practical application and fails to meet the market demand for multifunctional, high-performance polyester materials.

[0007] Monolayer MoS2 is a unique two-dimensional layered material with an extremely high specific surface area and many unique physicochemical properties. When introduced into a polymer matrix as a functionalizing agent, it can form molecular composite materials, with a reinforcing effect far exceeding that of traditional nanomaterials. Simultaneously, the addition of monolayer MoS2 can provide polymers with unique functions such as toughening, photothermal properties, and antibacterial properties, making it an ideal material for the functional modification of polyester materials. For example, its photothermal function can cause polyester materials to heat up under light, possessing potential solar energy utilization value; its antibacterial function can improve the hygienic properties of polyester materials.

[0008] However, there are some problems when using monolayer MoS2 to modify polyester materials. Because monolayer MoS2 has a dark color and the dye material is difficult to bond tightly with the polymer chains, there is a weak interaction between the dye molecules and the polymer chains. This easily leads to difficulties in dyeing, easy discoloration, and unstable color. This poses a significant challenge to applications where color is critical, such as textile dyeing, limiting its application and promotion in related fields.

[0009] In summary, there is an urgent need to develop a special polyester modifier that can solve the problems of existing polyester functional modifiers and fully leverage the advantages of single-layer MoS2 for multi-functional modification, so as to realize the multi-functionality and high performance of polyester materials and meet the ever-growing market demand for polyester materials. Summary of the Invention

[0010] The purpose of this invention is to address the aforementioned problems in the prior art by providing a polyester three-effect functionalized modification agent, its preparation method, and its application.

[0011] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: A method for preparing a polyester triple-functionalized modifier includes the following steps:

[0012] S00. Monolayer MoS2 nanosheets were synthesized by spatial confinement method.

[0013] S10. The monolayer MoS2 nanosheets are uniformly mixed with ethylene glycol solution by ultrasound and / or stirring to obtain a dispersion.

[0014] The mass fraction of the dispersion is between 0.0001% and 20%.

[0015] S20. Sodium dihydroxydiethyl phthalate-5-sulfonate is added to the dispersion. The mass ratio of sodium dihydroxydiethyl phthalate-5-sulfonate to monolayer MoS2 nanosheets is 3-5:1, so that it undergoes a grafting reaction with monolayer MoS2 nanosheets. After post-treatment, a polyester three-function functionalized modification agent is obtained.

[0016] The grafting reaction involves the tight bonding between the π bonds of sodium diethyl phthalate-5-sulfonate and the surface sites of monolayer MoS2 nanosheets through the chemical coupling effect generated by the highly delocalized π electrons of the benzene ring and the external electrons of the sulfur atom, forming a tight grafting site.

[0017] Furthermore, in the S00 step, the spatial confinement method uses layered bimetallic oxides as micro / nano reactors, utilizing the interlayer gaps as confining spaces to restrict the MoS4 during calcination. 2- The longitudinal growth space of the monolayer MoS2 nanosheets is decomposed to ensure that the synthesized nanosheets have a high monolayer ratio of greater than 99%.

[0018] Furthermore, in the S00 step, the spatial confinement method uses MoS4 2- After being intercalated into the interlayer of layered bimetallic oxides, the mixture was calcined under inert gas protection, and then acid-washed to remove the mixed metal oxides, resulting in monolayer MoS2 nanosheets.

[0019] Furthermore, in step S20, the calcination temperature is 350-600℃ and the calcination time is 2-5h.

[0020] Furthermore, in step S20, after adding sodium diethyl phthalate-5-sulfonate, the mixture is stirred or sonicated throughout the process to react with the monolayer MoS2 nanosheets. After the reaction is complete or the set time is reached, the mixture is allowed to stand before post-processing.

[0021] Furthermore, in step S20, the settling time is 12-20 hours.

[0022] Furthermore, in step S20, the post-processing includes: solid-liquid separation by means of filtration or centrifugation, retaining the solid; and washing the solid obtained from the reaction multiple times with ethylene glycol and then drying it.

[0023] A polyester triple-functionalized modifier is prepared by the above-described method for preparing polyester triple-functionalized modifiers.

[0024] The application of a polyester triple-functionalized modifier, as described above, includes the following steps:

[0025] Polyester triple-functionalized modifiers are dispersed in a polymer liquid monomer medium by ultrasonication or stirring to obtain a monomer dispersion with a mass fraction of 0.0001-20%.

[0026] Functionalized polymer nanocomposites were synthesized by in-situ polymerization of monomer dispersions.

[0027] The polymer liquid monomer medium includes one or more of ethylene glycol, 1,4-butanediol, diphenylmethane diisocyanate, toluene diisocyanate, caprolactam, methyl methacrylate, lactide, and glycolide.

[0028] Furthermore, the polymer nanocomposite material includes one or more of polyethylene terephthalate, polybutylene adipate / terephthalate, polyurethane, polyamide, polymethyl methacrylate, polylactic acid, polyglycolic acid, and polybutylene succinate / terephthalate.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] I. Advantages of Function Integration and Addition Capacity

[0031] Overcoming the limitation of existing auxiliaries having only single functions, this invention prepares a special auxiliary agent with three functional effects: photothermal, antibacterial, and solution-dyeing properties, by grafting SIPE (diethyl bis(hydroxyethyl) phthalate-5-sulfonate) onto the surface of monolayer MoS2 nanosheets. Adding only a single auxiliary agent can endow polyester materials with multiple excellent functions such as photothermal properties, antibacterial properties, solution-dyeing properties, and dyeability, expanding the application range of the material and meeting diverse market demands.

[0032] The addition of additives is significantly reduced. Compared with existing additives, the addition of additives in this invention is extremely low, which effectively reduces production costs and provides a cost advantage for the product in the market. It has broad application prospects and can promote the development of related industries.

[0033] II. High-Temperature Stability and Process Simplification

[0034] It exhibits excellent high-temperature stability and can be directly added to polymer monomer feedstock solutions for high-temperature esterification, polycondensation, and other processes. It produces polyester products with superior antibacterial, photothermal, and dyeable properties without post-processing, simplifying traditional production processes, reducing production steps and costs, and improving production efficiency.

[0035] This direct addition method effectively increases the added value of products, gives them more unique properties, meets the needs of the high-end market, and expands the application market, creating conditions for the application of polyester products in more fields.

[0036] III. Solving the problem of family reunification and improving compatibility

[0037] This invention effectively solves the problem of easy agglomeration of functionalized additives in polyester matrices. In the additives prepared by this invention, the ester bond ends of SIPE can interact with the polar polymer matrix and are covalently grafted onto the polymer chain segments through polymerization, which greatly improves the compatibility of MoS2 nanosheets with the polyester matrix.

[0038] This high compatibility ensures that MoS2 nanosheets are uniformly dispersed in the polyester matrix, maximizing their functionality, improving the overall performance and stability of the material, and extending its service life.

[0039] IV. Advantages of Raw Materials and Dyeing

[0040] The raw materials used in this invention are all common in conventional polymer synthesis processes, which are inexpensive and reduce production costs. At the same time, the process is simple, easy to operate and control, and conducive to large-scale production.

[0041] Sodium di(hydroxyethyl) isophthalate-5-sulfonate, as a common polymer dyeability modifier, has sulfonate groups that readily interact with cationic dyes, making the dye and polymer molecular chains more tightly bonded, improving dyeing efficiency, ensuring uniform dyeing, and successfully solving the problems of dark color and poor dyeability of MoS2 nanosheet modified materials, thus enriching the color selection and dyeing quality of products.

[0042] V. Synthesis conditions and industrial applicability

[0043] The preparation method for the additives uses mild synthesis conditions, avoiding the harsh reaction conditions that place high demands on equipment and energy, thus reducing production risks and costs. At the same time, the synthesis quality is high, ensuring the stability and reliability of the additives' performance.

[0044] It is easy to scale up for industrial production and can meet the needs of a large market. Furthermore, this invention does not affect conventional polymer synthesis processes. Functionalized polyester materials can be synthesized by directly adding this modified agent to the existing synthesis process without the need for large-scale modification of existing production lines. It is suitable for current industrial preparation, reduces the cost and difficulty of industrial upgrading, and facilitates rapid promotion and application. Attached Figure Description

[0045] Figure 1 Infrared spectrum of the special additive for photothermal / antibacterial / solution coloring three-effect functional modification prepared by grafting sodium diethyl isophthalate-5-sulfonate (SIPE) onto the surface of monolayer MoS2 nanosheets according to the present invention.

[0046] Figure 2 This is a fluorescence confocal image of the three-effect functional modified polyethylene terephthalate material in Example 1 of the present invention.

[0047] Figure 3 This is a TEM image showing the internal nanosheet dispersion of the three-effect functional modified polyethylene terephthalate material in Example 1 of the present invention. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0049] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting this invention.

[0050] Example 1

[0051] In Example 1, ethylene glycol was selected as the dispersion medium. MoS2 nanosheets with a mass fraction of 1% were added to ethylene glycol and dispersed evenly by ultrasonic treatment.

[0052] In Example 1, the present invention added sodium dihydroxyethyl isophthalate-5-sulfonate at a mass ratio of 3:1 to MoS2 to the dispersion, sonicated it at room temperature for 16 hours, and then allowed it to stand for 16 hours.

[0053] In Example 1, the present invention performs solid-liquid separation on the above-treated dispersion by means of vacuum filtration or centrifugation, retaining the solid; the solid is washed multiple times with ethylene glycol and then dried to obtain SIPE grafted monolayer MoS2 functionalized modification agent.

[0054] In Example 1, ethylene glycol and terephthalic acid were selected as comonomers. Specifically, 0.680g of SIPE grafted monolayer MoS2 functionalized modifier was added to 40.3g of ethylene glycol and uniformly dispersed by ultrasonication to obtain a SIPE-MoS2-ethylene glycol dispersion.

[0055] In Example 1, the present invention placed the above-mentioned SIPE-MoS2-ethylene glycol dispersion and 83g of terephthalic acid into a reactor (alcohol-to-acid ratio of 1.3:1). After thorough mixing, the mixture was continuously mechanically stirred. When the reaction system reached 240°C, TBT was added as a catalyst at an amount of 0.15% of the acid molar content. The esterification reaction was carried out under a nitrogen atmosphere at 240°C for 8 hours. The reactants turned dark brown, the esterification rate exceeded 90%, and the esterification reaction was stopped after no distillate was observed within half an hour. Subsequently, the vacuum degree of the reaction system was evacuated to 100 Pa using a vacuum pump, the temperature was raised to 280°C, and the reaction was continuously stirred for 3 hours until the "stick climbing" phenomenon occurred and the viscosity of the reaction system no longer increased. The reaction was then stopped to obtain a functionalized modified polyethylene terephthalate product, wherein the content of SIPE-grafted monolayer MoS2 functionalized modifier was 0.5wt%.

[0056] In Example 1, the obtained product material was cut and granulated, and then processed by melt spinning to obtain functionalized modified polyethylene terephthalate fiber material. Tested by a universal testing machine, its tensile strength reached 100 MPa, Young's modulus reached 4.8 GPa, and elongation at break reached 450%.

[0057] In Example 1, the antibacterial properties of the obtained product material were tested.

[0058] In Example 1, the photothermal performance of the product was tested using a standard sunlight at an ambient temperature of 23°C, and the temperature change of the product was recorded by an infrared camera.

[0059] In Example 1, the obtained fiber material was characterized by fluorescence confocal microscopy (e.g., Figure 2 As shown in the figure, the SIPE-grafted monolayer MoS2 functionalized modifier is well dispersed in the fiber without aggregation. In contrast, Comparative Example 1 and Comparative Agent 2 mentioned later both exhibit some aggregation.

[0060] Example 2

[0061] In Example 2, ethylene glycol was selected as the dispersion medium. MoS2 nanosheets with a mass fraction of 1% were added to ethylene glycol and dispersed evenly by ultrasonic treatment.

[0062] In Example 2, sodium dihydroxyethyl isophthalate-5-sulfonate with a mass ratio of 3:1 to MoS2 was added to the dispersion, and the mixture was ultrasonically treated at room temperature for 16 hours and then allowed to stand for 16 hours.

[0063] In Example 2, the present invention performs solid-liquid separation on the above-treated dispersion by means of vacuum filtration or centrifugation, retaining the solid; the solid is washed multiple times with ethylene glycol and then dried to obtain SIPE grafted monolayer MoS2 functionalized modification agent.

[0064] In Example 2, 1,4-butanediol and terephthalic acid, oxalic acid were selected as comonomers. Specifically, 0.680g of SIPE grafted monolayer MoS2 functionalized modifier was added to 58.58g of 1,4-butanediol and uniformly dispersed by ultrasonication to obtain a SIPE-MoS2-1,4-butanediol dispersion.

[0065] In Example 2, the present invention placed the above-mentioned SIPE-MoS2-1,4-butanediol dispersion, 36.55g of terephthalic acid, and 40.92g of adipic acid into a reactor (alcohol-to-acid ratio of 1.3:1). After thorough mixing, the mixture was continuously mechanically stirred, and a nitrogen atmosphere was added for protection. When the reaction system reached 180°C, TBT was added as a catalyst at an amount of 0.15% of the acid molar content. The reaction was carried out at 180°C for 2 hours, then the temperature was raised to 200°C and reacted for another 2 hours. After that, the temperature was raised again to 220°C and the esterification reaction was stirred for 10 hours. The reactant turned dark brown, the esterification rate exceeded 90%, and the esterification reaction was stopped after no distillate was observed within half an hour. The vacuum level of the reaction system was then evacuated to 100 Pa using a vacuum pump, and the temperature was raised to 240 °C. The reaction was stirred continuously for 4 hours until the stick-climbing phenomenon occurred and the viscosity of the reaction system no longer increased. The reaction was then stopped to obtain the functionalized modified poly(adipic acid) / butylene terephthalate product, in which the content of SIPE-grafted monolayer MoS2 functionalized modification agent was 0.5 wt%.

[0066] In Example 2, the obtained product material was cut and granulated, and then processed into a functionalized modified poly(butylene adipate) / poly(terephthalate) terephthalate film material by hot pressing. The resulting material was cut into dumbbell-shaped strips. Testing with a universal testing machine revealed a tensile strength of 60 MPa, a Young's modulus of 100 MPa, and an elongation at break of 900%.

[0067] In Example 2, the antibacterial properties of the obtained product material were tested.

[0068] Example 3

[0069] In Example 3, ethylene glycol was selected as the dispersion medium. MoS2 nanosheets with a mass fraction of 1% were added to ethylene glycol and dispersed evenly by ultrasonic treatment.

[0070] In Example 3, sodium dihydroxyethyl isophthalate-5-sulfonate with a mass ratio of 3:1 to MoS2 was added to the dispersion, and the mixture was ultrasonically treated at room temperature for 16 hours and then allowed to stand for 16 hours.

[0071] In Example 3, the present invention performs solid-liquid separation on the above-treated dispersion by means of vacuum filtration or centrifugation, retaining the solid; the solid is washed multiple times with ethylene glycol and then dried to obtain SIPE grafted monolayer MoS2 functionalized modification agent.

[0072] In Example 3, ethylene glycol and terephthalic acid were selected as comonomers in this invention. Specifically, 0.136g of SIPE grafted monolayer MoS2 functionalized modifier was added to 40.3g of ethylene glycol and uniformly dispersed by ultrasonication to obtain a SIPE-MoS2-ethylene glycol dispersion.

[0073] In Example 3, the above-mentioned SIPE-MoS2-ethylene glycol dispersion and 83g of terephthalic acid were placed in a reactor (alcohol-to-acid ratio of 1.3:1). After thorough mixing, the mixture was continuously mechanically stirred. When the reaction system reached 240°C, TBT was added as a catalyst at a concentration of 0.15% of the acid molar content. The esterification reaction was carried out under a nitrogen atmosphere at 240°C for 8 hours. The reactants turned dark brown, the esterification rate exceeded 90%, and the esterification reaction was stopped after no distillate was observed within half an hour. Subsequently, the vacuum degree of the reaction system was evacuated to 100 Pa using a vacuum pump, the temperature was raised to 280°C, and the reaction was continuously stirred for 3 hours until the "stick climbing" phenomenon occurred and the viscosity of the reaction system no longer increased. The reaction was then stopped to obtain a functionalized modified polyethylene terephthalate product, wherein the content of SIPE-grafted monolayer MoS2 functionalized modifier was 0.1 wt%.

[0074] In Example 3, the obtained product material was cut and granulated, and then processed by melt spinning to obtain functionalized modified polyethylene terephthalate fiber material. Tested by a universal testing machine, its tensile strength reached 90 MPa, Young's modulus reached 3.5 GPa, and elongation at break reached 750%.

[0075] In Example 3, the antibacterial properties of the obtained product material were tested.

[0076] In Example 3, the photothermal performance of the product was tested using a standard sunlight at an ambient temperature of 23°C, and the temperature change of the product was recorded by an infrared camera.

[0077] Example 4

[0078] Polyethylene terephthalate was prepared according to the method of Example 1, except that the mass ratio of MoS2 to sodium dihydroxyethyl isophthalate-5-sulfonate added to the dispersion was 5:1.

[0079] Example 5

[0080] Polyethylene terephthalate was prepared according to the method in Example 1, except that the esterification temperature was 230°C and the polycondensation temperature was 300°C.

[0081] Comparative Example 1

[0082] Polyethylene terephthalate was prepared according to the method of Example 1, except that SIPE grafted monolayer MoS2 functionalizing agent was not added, and other parameters were the same as in Example 1.

[0083] Comparative Example 2

[0084] Polyethylene terephthalate was prepared according to the method of Example 1, except that only MoS2 was added as a modifying agent and SIPE was not added. Other parameters were the same as in Example 1.

[0085] Comparative Example 3

[0086] Polyethylene terephthalate was prepared according to the method of Example 1, except that only SIPE was added as a modifying agent and MoS2 was not added. Other parameters were the same as in Example 1.

[0087] Based on the above embodiments and comparative examples, such as Figure 1 As shown, Fourier transform infrared spectroscopy confirmed that the auxiliary material, sodium diethyl phthalate-5-sulfonate (SIPE), was successfully grafted onto the MoS2 surface.

[0088] Performance was compared using fluorescence confocal microscopy and transmission electron microscopy. Figure 2 It can be found that in Example 1 with SIPE-grafted MoS2 additive, the dispersibility of monolayer MoS2 in the polymer matrix is ​​significantly improved compared to Comparative Example 2. Furthermore, mechanical data (Table 1) shows that the elongation at break of Example 1 with SIPE-grafted MoS2 additive is significantly improved compared to Comparative Examples 1 and 2. This is also because the compatibility between monolayer MoS2 and the polymer matrix is ​​improved after SIPE grafting, reducing the occurrence of agglomeration.

[0089] Table 1 Mechanical properties of polyethylene terephthalate (PET) materials based on triple-functional modification

[0090]

[0091] The photothermal performance was compared by recording temperature changes using an infrared camera. Figure 3 As can be seen from Example 1 and Comparative Example 1, the polyester material with SIPE-grafted monolayer MoS2 triple-functional modifier exhibits extremely excellent photothermal properties, reaching a maximum temperature of 70°C within 2 minutes under standard sunlight irradiation. Comparing Example 1 and Comparative Example 2, it is evident that SIPE grafting promotes good dispersion of monolayer MoS2 in the polyester matrix, further enhancing the material's functionality. Data from Examples 4 and 5 also show superior performance compared to Comparative Examples 1 and 2.

[0092] As can be seen from Table 2, the functional polyester materials prepared by adding SIPE grafted monolayer MoS2 triple-function modifier in Examples 1-5 have excellent antibacterial properties, with antibacterial rates all reaching over 96%, meeting market demand.

[0093] Table 2. Antibacterial properties of polyester materials based on triple-effect functional modification.

[0094]

[0095]

[0096] The fiber solution dyeing of the materials in Example 1 and Comparative Example 3 revealed that the dyeing efficiency, dyeing uniformity, and color aging resistance of Example 1 were significantly improved after the addition of SIPE grafting. Furthermore, after multiple washes, the color of Example 1 did not show any fading or peeling, while the color of Comparative Example 3 did peel off. Therefore, it can be seen that the three-effect functional modifier provided by this invention can effectively improve the dyeability of the product and meet the requirements of subsequent processing.

[0097] A comparison of the mechanical, photothermal, and antibacterial properties of Examples 1, 4, and 5 revealed that the present invention exhibits excellent stability and versatility under different ratios of SIPE to monolayer MoS2 nanosheets and under different reaction conditions.

[0098] The parts of this invention not described in detail are prior art, therefore they are not described in detail here.

[0099] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0100] Although this document uses a considerable amount of technical terminology, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

[0101] This invention is not limited to the preferred embodiments described above. Anyone can derive other products in various forms under the guidance of this invention. However, regardless of any changes made to their shape or structure, any technical solution that is the same as or similar to this invention falls within the protection scope of this invention.

Claims

1. A method for preparing a polyester triple-functionalized modifier, characterized in that, Includes the following steps: S00. Monolayer MoS2 nanosheets were synthesized by spatial confinement method. S10. The monolayer MoS2 nanosheets are uniformly mixed with an ethylene glycol solution by ultrasound and / or stirring to obtain a dispersion. The mass fraction of the dispersion is between 0.0001% and 20%. S20. Sodium dihydroxyethyl phthalate-5-sulfonate is added to the dispersion. The mass ratio of sodium dihydroxyethyl phthalate-5-sulfonate to monolayer MoS2 nanosheets is 3-5:1, so that it undergoes a grafting reaction with monolayer MoS2 nanosheets. After post-treatment, a polyester three-function functionalized modifier is obtained. The grafting reaction involves the π bond of sodium bis(hydroxyethyl) phthalate-5-sulfonate tightly binding with the surface sites of the monolayer MoS2 nanosheets through the chemical coupling effect generated by the highly delocalized π electrons of the benzene ring and the external electrons of the sulfur atom, forming a tight grafting site.

2. The preparation method of the polyester triple-functionalized modifier according to claim 1, characterized in that, In step S00, the spatial confinement method uses layered bimetallic oxides as micro / nano reactors, utilizing the interlayer gaps as confining spaces to restrict the MoS4 during calcination. 2- The longitudinal growth space of the monolayer MoS2 nanosheets is decomposed to ensure that the synthesized nanosheets have a high monolayer ratio of greater than 99%.

3. The preparation method of the polyester triple-functionalized modifier according to claim 2, characterized in that, In step S00, the spatial confinement method uses MoS4 2- After being intercalated into the interlayer of layered bimetallic oxides, the mixture was calcined under inert gas protection, and then acid-washed to remove the mixed metal oxides, resulting in monolayer MoS2 nanosheets.

4. The preparation method of the polyester triple-functionalized modifier according to claim 3, characterized in that, In step S20, the calcination temperature is 350-600℃ and the calcination time is 2-5h.

5. The preparation method of the polyester triple-functionalized modifier according to claim 1, characterized in that, In step S20, after adding sodium diethyl phthalate-5-sulfonate, the mixture is stirred or sonicated throughout the process to react with the monolayer MoS2 nanosheets. After the reaction is complete or the set time is reached, the mixture is allowed to stand before post-processing.

6. The method for preparing the polyester triple-functionalized modifier according to claim 5, characterized in that, In step S20, the settling time is 12-20 hours.

7. The method for preparing the polyester triple-functionalized modifier according to claim 5, characterized in that, In step S20, the post-processing includes: performing solid-liquid separation by filtration or centrifugation to retain the solid; and washing the solid obtained from the reaction multiple times with ethylene glycol and then drying it.

8. A polyester triple-functionalized modifier, characterized in that, It is prepared by the preparation method of the polyester three-effect functionalized modified additive according to any one of claims 1-7.

9. The application of the polyester triple-functionalized modifier as described in claim 8, characterized in that, Includes the following steps: Polyester triple-functionalized modifiers are dispersed in a polymer liquid monomer medium by ultrasonication or stirring to obtain a monomer dispersion with a mass fraction of 0.0001-20%. The monomer dispersion was condensed into a functionalized polymer nanocomposite material by in-situ polymerization. The polymer liquid monomer medium includes one or more of ethylene glycol, 1,4-butanediol, diphenylmethane diisocyanate, toluene diisocyanate, caprolactam, methyl methacrylate, lactide, and glycolide.

10. The application of the polyester triple-functionalized modifier according to claim 9, characterized in that, The polymer nanocomposite material includes one or more of polyethylene terephthalate, polybutylene adipate / terephthalate, polyurethane, polyamide, polymethyl methacrylate, polylactic acid, polyglycolic acid, and polybutylene succinate / terephthalate.

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