CN113214620B - Preparation method and application of epoxy group organic modified montmorillonite - Google Patents

Abstract

The invention discloses a preparation method and application of epoxy organic modified montmorillonite. The preparation method comprises: (1) dissolving epichlorohydrin in an organic solvent, adding a long-chain tertiary amine, and performing an addition reaction to obtain epoxy quaternary ammonium salt; (2) disperse natural montmorillonite in deionized water to obtain montmorillonite suspension; (3) dissolve epoxy quaternary ammonium salt in deionized water to obtain epoxy quaternary ammonium salt solution; (4) adding the epoxy quaternary ammonium salt solution dropwise to the montmorillonite suspension, and modifying the montmorillonite by ion exchange reaction to obtain the primary product; (5) centrifuging, washing, drying and refining the primary product, A powdery epoxy-organic modified montmorillonite was obtained. The organically modified montmorillonite prepared by the invention has a large interlayer spacing and simultaneously has active epoxy groups, which can improve the dispersibility of the montmorillonite in the biodegradable polyester blending system and play a better role in the Augmentation and enhancement.

Description

A kind of preparation method and application of epoxy organic modified montmorillonite

technical field

The invention belongs to the field of preparation of nano-composite materials, and in particular relates to a preparation method of epoxy-based organically modified montmorillonite.

Background technique

Montmorillonite is a layered silicate natural mineral with abundant reserves in the earth's crust and wide application fields. The surface of the silicate sheet is negatively charged, and a large number of cations are adsorbed between the layers, which accumulate into clusters by the electrostatic interaction between the layers. The special lamellar structure determines the unique properties of montmorillonite, such as large specific surface area, good ion exchange capacity and hydrophilic and oleophobic properties. As a silicate inorganic filler, the hydrophilic and oleophobic properties of montmorillonite limit its application in polymers, but its special structure endows it with great potential for organic modification.

In order to increase the interlayer spacing of montmorillonite and facilitate the insertion of polymer molecular chains, cationic modifiers such as quaternary ammonium salts and quaternary phosphonium salts with long-chain alkyl groups are usually used to organically modify montmorillonite. The modified montmorillonite was well dispersed in some polymer systems. The Chinese patent with the publication number CN110079019A discloses a toughened and modified PA-PP (nylon-polypropylene) mixed resin material and a preparation method thereof. The surface of montmorillonite is modified with a rare earth coupling agent, and then the polypropylene The modified montmorillonite was introduced into the melt-grafted maleic anhydride to improve the compatibility and mechanical properties of the blend.

In general, in order to achieve the effect of compatibilization and enhancement, the modified montmorillonite needs to have a large interlayer spacing on the one hand to facilitate the insertion of polymer molecular chains; on the other hand, it needs to interact with the polymer matrix. In order to achieve the purpose, it is often necessary to modify the montmorillonite many times or add other compatibilizers during processing, which is a cumbersome process. Moreover, the current modified montmorillonite has poor dispersibility in biodegradable polyester systems such as polylactic acid, and the compatibilization and enhancement effect is not obvious, and it lacks the potential for industrial application.

SUMMARY OF THE INVENTION

In order to solve the problems pointed out in the background art, the present invention provides a preparation method and application of epoxy-based organic modified montmorillonite.

The preparation method of a kind of epoxy-based organic modified montmorillonite provided by the invention comprises:

(1) dissolving epichlorohydrin in organic solvent, adding long-chain tertiary amine, and obtaining epoxy quaternary ammonium salt through addition reaction;

(2) natural montmorillonite is dispersed in deionized water to obtain montmorillonite suspension;

(3) epoxy quaternary ammonium salt is dissolved in deionized water to obtain epoxy quaternary ammonium salt solution;

(4) adding the epoxy quaternary ammonium salt solution dropwise to the montmorillonite suspension, and modifying the montmorillonite by ion exchange reaction to obtain the primary product;

(5) Centrifuge, wash, dry and refine the initial product to obtain powdered epoxy-based organically modified montmorillonite.

The present invention does not specifically limit the organic solvent for dissolving epichlorohydrin, as long as it can dissolve epichlorohydrin and does not react with long-chain tertiary amines, such as ethanol, methanol or a mixed solvent of the two. In the present invention, the rotational speed of stirring in step (1) is 100-500 r/min, and the rotational speed of stirring in step (4) is 200-1000 r/min.

The epoxy value of the epoxy-based organically modified montmorillonite prepared by the present invention is 1mol/100g～10mol/100g, and the epoxy value refers to the amount of the epoxy group in every 100g of the epoxy-based organically modified montmorillonite .

In step (1), the reaction temperature is preferably 60°C to 70°C, the reaction time is preferably 3h to 5h, and the molar ratio of epichlorohydrin and long-chain tertiary amine is preferably 1.2:1 to 1.5:1.

Preferably, the natural montmorillonite is one or a combination of both sodium-based montmorillonite and calcium-based montmorillonite.

Further, the long-chain tertiary amine is a tertiary amine with one or more long-chain alkyl groups; the long-chain tertiary amine is preferably a C ₁₂ -C ₁₈ alkyl dimethyl tertiary amine, for example, dodecyl dimethyl amine A combination of one or more of tertiary amine, tetradecyl dimethyl tertiary amine, hexadecyl dimethyl tertiary amine, and octadecyl dimethyl tertiary amine; it can also be dioctadecyl Methyl tertiary amine.

Further, in step (1), the mixed solution obtained from the reaction is subjected to vacuum distillation and washing to obtain epoxy quaternary ammonium salt.

In step (4), the dosage of epoxy quaternary ammonium salt is preferably 1 to 5 times of the cation exchange capacity of montmorillonite, and the modification reaction temperature is preferably 60°C to 70°C, more preferably 65°C; the reaction time is preferably 5h to 7h, More preferably, it is 6h. Further, the refinement in step (5) is to refine the particle size of the epoxy-based organically modified montmorillonite to 18 μm˜74 μm.

The application of the prepared epoxy-based organically modified montmorillonite provided by the present invention is as follows: adding the epoxy-based organically modified montmorillonite into the biodegradable polyester system by melt blending.

Preferably, the addition amount of the epoxy-based organically modified montmorillonite is 0.5 wt % to 1.5 wt %, more preferably 1.0 wt %.

Further, the biodegradable polyester is a biodegradable polyester containing a terminal hydroxyl group or a terminal carboxyl group, preferably polylactic acid, polycaprolactone, polyglycolic acid, polyethylene succinate, polybutylene succinate A mixture of one or more of the glycol esters.

Compared with the prior art, the main advantages and beneficial effects of the present invention are as follows:

(1) The process is simple and feasible, and one-step modification can obtain organically modified montmorillonite with large interlayer spacing and active epoxy groups at the same time, and the cost is low.

(2) The active epoxy groups carried by the obtained organically modified montmorillonite can improve the dispersibility of montmorillonite in the biodegradable polyester system by reacting with the terminal carboxyl groups and terminal hydroxyl groups in the polymer molecular chain. , to better play the role of augmentation and enhancement.

Description of drawings

Fig. 1 is the infrared spectrogram of Na-MMT (natural sodium montmorillonite) and OMMT (epoxy organically modified montmorillonite);

Figure 2 shows the X-ray diffraction patterns of Na-MMT, OMMT and composite PLA/PBS/OMMT;

Figure 3 is a scanning electron microscope photograph of the composite material, wherein, Figure (a) is a scanning electron microscope photograph of the Na-MMT-added composite material, and Figure (b) is a scanning electron microscope photograph of the OMMT-added composite material.

Detailed ways

In order to make those skilled in the art better understand the technical solutions and technical effects of the present invention, several embodiments will be provided below. Obviously, the following descriptions are only embodiments, which do not limit the protection scope of the present invention.

Example 1

Take 50 mL of epichlorohydrin, dissolve it in 200 mL of ethanol, and raise the temperature to 60°C. Slowly add dodecyl dimethyl tertiary amine, the molar ratio of epichlorohydrin and dodecyl dimethyl tertiary amine is 1.5:1, mechanically stir at 200r/min speed for 3h, and cool to room temperature. The above solution was distilled under reduced pressure using a rotary evaporator, and ethanol was added for repeated washing three times to obtain a pale yellow paste, that is, epoxy quaternary ammonium salt.

Take 2g of sodium montmorillonite with a cation exchange capacity of 100meq/100g (meq/100g is the unit of cation exchange capacity, 1meq/100g means that each gram of sodium montmorillonite contains 1mmol of exchangeable Na ⁺ ions), add 250mL of deionized Water, ultrasonically dispersed to prepare a montmorillonite suspension. Take 2.5 g of epoxy quaternary ammonium salt, dissolve it in 50 mL of deionized water, and slowly drop it into the montmorillonite suspension. The temperature was raised to 65°C and mechanically stirred at 500r/min for 6h, and the yellow montmorillonite suspension gradually turned white. The mixed solution was centrifuged at a speed of 7000r/min, detected with silver nitrate reagent, washed until there was no chloride ion, vacuum-dried at 80°C for 24h, ground and sieved through a 500-mesh sieve to obtain a white powdery epoxy-based organically modified montmorillonite. earth.

To the polylactic acid/polybutylene succinate system with a mass ratio of 80:20, 1 wt % of epoxy-based organically modified montmorillonite was added, and the obtained composite material was tested. In addition, 1 wt % of unmodified montmorillonite was added to the polylactic acid/polybutylene succinate system with a mass ratio of 80:20 as a comparative example, and the same test was performed on the obtained composite material. It was found by XRD that in the composite material, the interlayer spacing of the modified montmorillonite in this example was expanded to 4.41 nm, and the interlayer spacing of the unmodified montmorillonite was 1.25 nm without change. It was found by scanning electron microscopy that the size of the dispersed phase in the composite material in this example became smaller and the distribution was more uniform. At the same time, compared with the comparative example, the tensile strength of the composite material added with dodecyl dimethyl epoxy group organically modified montmorillonite increased from 38.55MPa to 51.92MPa, and its impact strength increased from 1.65kJ/m ² increased to 2.17kJ/m ² .

Example 2

Take 50 mL of epichlorohydrin, dissolve it in 200 mL of ethanol, and raise the temperature to 65°C. Slowly add tetradecyl dimethyl amine, the molar ratio of epichlorohydrin and tetradecyl dimethyl tertiary amine is 1.3:1, mechanically stir at 200r/min for 4h, and cool to room temperature. The above solution was distilled under reduced pressure using a rotary evaporator, and ethanol was added for repeated washing three times to obtain a pale yellow paste, that is, epoxy quaternary ammonium salt.

Take 2 g of sodium-based montmorillonite with a cation exchange capacity of 100 meq/100 g, add 250 mL of deionized water, and ultrasonically disperse to obtain a montmorillonite suspension. Take 2 g of epoxy quaternary ammonium salt, dissolve it in 50 mL of deionized water, and slowly drop it into the montmorillonite suspension. The temperature was raised to 65°C and mechanically stirred at a speed of 500r/min for 6h, and the yellow montmorillonite suspension gradually turned white. The mixed solution was centrifuged at a speed of 7000 r/min, detected with silver nitrate reagent, washed until there was no chloride ion, vacuum-dried at 80 °C for 24 h, ground and passed through a 500-mesh sieve to obtain a white powdery ring epoxy-based organically modified Mongolian exfoliate.

To the polylactic acid/polybutylene succinate system with a mass ratio of 80:20, 1 wt % of epoxy-based organically modified montmorillonite was added, and the obtained composite material was tested. In addition, 1 wt % of unmodified montmorillonite was added to the polylactic acid/polybutylene succinate system with a mass ratio of 80:20 as a comparative example, and the same test was performed on the obtained composite material. It was found by XRD that in the composite material, the interlayer spacing of the modified montmorillonite in this example was expanded to 4.67 nm, and the interlayer spacing of the unmodified montmorillonite remained unchanged to 1.25 nm. It was found by scanning electron microscopy that the size of the dispersed phase in the composite material in the examples became smaller and the distribution was more uniform. At the same time, compared with the comparative example, the tensile strength of the composite material added with tetradecyl dimethyl epoxy group organically modified montmorillonite increased from 38.55MPa to 53.31MPa, and its impact strength increased from 1.65kJ/m ² increased to 2.66kJ/m ² .

Example 3

Take 50 mL of epichlorohydrin, dissolve it in 200 mL of ethanol, and raise the temperature to 70°C. Slowly add octadecyl dimethyl tertiary amine, the molar ratio of epichlorohydrin and octadecyl dimethyl tertiary amine is 1.2:1, stir mechanically at 200r/min speed for 5h, and cool to room temperature. The above solution was distilled under reduced pressure using a rotary evaporator, and ethanol was added for repeated washing three times to obtain a pale yellow paste, that is, epoxy quaternary ammonium salt.

Take 2 g of sodium-based montmorillonite with a cation exchange capacity of 100 meq/100 g, add 250 mL of deionized water, and ultrasonically disperse to obtain a montmorillonite suspension. Take 1.5g of epoxy quaternary ammonium salt, dissolve it in 50mL of deionized water, slowly add it dropwise to the montmorillonite suspension, raise the temperature to 65°C, stir mechanically at 500r/min for 6h, the yellow montmorillonite suspension gradually turns white. The mixed solution was centrifuged at a speed of 7000r/min, detected with silver nitrate reagent, washed until there was no chloride ion, vacuum-dried at 80°C for 24h, ground and sieved through a 500-mesh sieve to obtain a white powdery epoxy-based organically modified montmorillonite. earth.

To the polylactic acid/polybutylene succinate system with a mass ratio of 80:20, 0.5 wt % of epoxy-based organically modified montmorillonite was added, and the obtained composite material was tested. In addition, 0.5 wt % of unmodified montmorillonite was added to the polylactic acid/polybutylene succinate system with a mass ratio of 80:20 as a comparative example, and the same test was performed on the obtained composite material. It was found by XRD that in the composite material, the interlayer spacing of the modified montmorillonite in this example was expanded to 5.09 nm, and the interlayer spacing of the unmodified montmorillonite was 1.25 nm without change. It is found by scanning electron microscope that the size of the dispersed phase of the composite material becomes smaller and the distribution is more uniform in the examples. At the same time, compared with the comparative example, the tensile strength of the composite material added with octadecyldimethylepoxide organically modified montmorillonite increased from 37.25MPa to 59.55MPa, and its impact strength increased from 1.46kJ/m ² increased to 2.56kJ/m ² .

Example 4

Take 50 mL of epichlorohydrin, dissolve it in 200 mL of ethanol, and raise the temperature to 70°C. Slowly add octadecyl dimethyl tertiary amine, the molar ratio of epichlorohydrin and octadecyl dimethyl tertiary amine is 1.2:1, stir mechanically at 200r/min speed for 5h, and cool to room temperature. The above solution was distilled under reduced pressure using a rotary evaporator, and ethanol was added for repeated washing three times to obtain a pale yellow paste, that is, epoxy quaternary ammonium salt.

Take 2 g of sodium-based montmorillonite with a cation exchange capacity of 100 meq/100 g, add 250 mL of deionized water, and ultrasonically disperse to obtain a montmorillonite suspension. Take 1.5g of epoxy quaternary ammonium salt, dissolve it in 50mL of deionized water, slowly add it dropwise to the montmorillonite suspension, raise the temperature to 65°C, stir mechanically at 500r/min for 6h, the yellow montmorillonite suspension gradually turns white. The mixed solution was centrifuged at a speed of 7000r/min, detected with silver nitrate reagent, washed until there was no chloride ion, vacuum-dried at 80°C for 24h, ground and sieved through a 500-mesh sieve to obtain a white powdery epoxy-based organically modified montmorillonite. earth.

To the polylactic acid/polybutylene succinate system with a mass ratio of 80:20, 1 wt % of epoxy-based organically modified montmorillonite was added, and the obtained composite material was tested. In addition, 1 wt % of unmodified montmorillonite was added to the polylactic acid/polybutylene succinate system with a mass ratio of 80:20 as a comparative example, and the same test was performed on the obtained composite material. It was found by XRD that in the composite material, the lamellar spacing of epoxy-based organically modified montmorillonite in this example was expanded to 5.25 nm, and the lamellar spacing of unmodified montmorillonite remained unchanged to 1.25 nm. It is found by scanning electron microscope that the size of the dispersed phase of the composite material becomes smaller and the distribution is more uniform in the examples. At the same time, compared with the comparative example, the tensile strength of the composite material added with octadecyldimethylepoxide organically modified montmorillonite increased from 38.55MPa to 62.48MPa, and the impact strength of the composite material increased from 1.65kJ/ m ² increased to 3.01 kJ/m ² .

Example 5

Take 50 mL of epichlorohydrin, dissolve it in 200 mL of ethanol, and raise the temperature to 70°C. Slowly add octadecyl dimethyl tertiary amine, the molar ratio of epichlorohydrin and octadecyl dimethyl tertiary amine is 1.2:1, stir mechanically at 200r/min speed for 5h, and cool to room temperature. The above solution was distilled under reduced pressure using a rotary evaporator, and ethanol was added for repeated washing three times to obtain a pale yellow paste, that is, epoxy quaternary ammonium salt.

Take 2 g of sodium-based montmorillonite with a cation exchange capacity of 100 meq/100 g, add 250 mL of deionized water, and ultrasonically disperse to obtain a montmorillonite suspension. Take 1.5g of epoxy quaternary ammonium salt, dissolve it in 50mL of deionized water, slowly add it dropwise to the montmorillonite suspension, raise the temperature to 65°C, stir mechanically at 500r/min for 6h, the yellow montmorillonite suspension gradually turns white. The mixed solution was centrifuged at a speed of 7000r/min, detected with silver nitrate reagent, washed until there was no chloride ion, vacuum-dried at 80°C for 24h, ground and sieved through a 500-mesh sieve to obtain a white powdery epoxy-based organically modified montmorillonite. earth.

To the polylactic acid/polybutylene succinate system with a mass ratio of 80:20, 1.5 wt % of epoxy-based organically modified montmorillonite was added, and the obtained composite material was tested. In addition, 1.5 wt % of unmodified montmorillonite was added to the polylactic acid/polybutylene succinate system with a mass ratio of 80:20 as a comparative example. It is found by XRD that the interlayer spacing of epoxy-based organically modified montmorillonite in the composite material is expanded to 5.38 nm, and the interlayer spacing of unmodified montmorillonite remains unchanged to 1.25 nm. It is found by scanning electron microscope that the size of the dispersed phase of the composite material becomes smaller and the distribution is more uniform in the examples. At the same time, compared with the comparative example, the tensile strength of the composite material added with octadecyl dimethyl epoxy group organically modified montmorillonite increased from 36.25 MPa to 57.01 MPa, and the impact strength of the composite material increased from 1.38 MPa. kJ/m ² increased to 1.82kJ/m ² .

Table 1 lists the performance parameters of the epoxy-based organic modified montmorillonite prepared in Examples 1-5. It can be seen from the table that the longer the carbon chain of the tertiary amine alkyl group used in the modification of montmorillonite, the more obvious the expansion of the interlayer spacing of montmorillonite. The modified montmorillonite will form an intercalation structure in the polymer, and the epoxy group on the modified montmorillonite reacts with the terminal hydroxyl or terminal carboxyl group of the polymer molecular chain, which hinders the movement of the molecular chain and the aggregation of the dispersed phase. Thus, the compatibility and mechanical strength of composite materials can be improved. The compatibilization and enhancement effect of modified montmorillonite is related to its addition amount. When the addition amount of montmorillonite is too large, it is easy to lead to local agglomeration, resulting in stress concentration, thus reducing the overall performance of the material. For the montmorillonite obtained by the above process, the addition amount of the epoxy-based organically modified montmorillonite can be 0.5wt%-1.5wt%, 0.5wt%-1wt%, 1wt%-1.5wt%, preferably It is 0.5wt% to 1wt%, more preferably 1wt%, when the addition amount in the polylactic acid/polybutylene succinate system is 1wt%, the composite material has the most excellent comprehensive performance.

Table 1 Performance parameters of epoxy-based organic modified montmorillonite prepared in Examples 1-5

Referring to FIG. 1 , a comparison chart of infrared spectra of Na-MMT and OMMT prepared in Examples 3 to 4 is shown. As can be seen from the figure, in the infrared spectrum of Na-MMT, 3655cm ^-1 is the -OH asymmetric stretching vibration absorption peak of free water, 3458cm ^-1 is the -OH asymmetric stretching vibration absorption peak on the surface of montmorillonite, 1640cm ^{- 1} is the bending vibration absorption peak of -OH, and 1040 cm ^-1 , 800 cm ^-1 , and 460 cm ^-1 are the stretching, bending and rocking vibration absorption peaks of the Si-O-Si skeleton in the montmorillonite silicate skeleton, respectively. In the infrared spectrum of OMMT, the -OH asymmetric stretching vibration absorption peak of free water disappeared; the -CH ₃ at 2920cm ^-1 and the -CH ₂ -stretch vibration absorption peak at 2850cm ^-1 were successfully inserted into the organic modifier. There is a CN stretching vibration absorption peak at 1392cm ^-1 and slightly shifted to the right, which also indicates that the quaternary ammonium salt is inserted between the montmorillonite layers. In addition, there are stretching vibration absorption peaks of epoxy groups at 1240 cm ^-1 and bending vibration absorption peaks of epoxy groups at 908 cm ^-1 , indicating that epoxy groups exist on the modified montmorillonite.

Referring to FIG. 2, the X-ray diffraction patterns of Na-MMT, OMMT prepared in Examples 3 to 4 and composite material PLA/PBS/OMMT prepared in Example 4 are shown. The composite material PLA/PBS/OMMT is obtained by adding OMMT to PLA/PBS system (polylactic acid/polybutylene succinate system) was obtained, the mass ratio of PLA and PBS in PLA/PBS was 80:20, and the addition amount of OMMT was 1 wt%. It can be seen from the figure that the d ₀₀₁ interlayer spacing of unmodified Na-MMT is 1.25 nm, and the d ₀₀₁ interlayer spacing of epoxy-based organic modified montmorillonite OMMT reaches 2.13 nm. Applying OMMT to PLA/ In the PBS system, the d ₀₀₁ interlayer spacing of OMMT is further expanded to 5.38 nm. This indicates that the epoxy quaternary ammonium salt has been successfully inserted between the montmorillonite sheets, and in the PLA/PBS system, the polymer molecular chain is further inserted between the montmorillonite layers.

Referring to Figure 3, the SEM photo of the composite material is shown. Figure (a) is a composite material obtained by adding Na-MMT to a PLA/PBS system with a mass ratio of 80:20; Figure (b) is a composite material obtained by adding OMMT to the mass ratio of 80:20. The composites obtained by the PLA/PBS system with a ratio of 80:20, the addition of Na-MMT and OMMT are both 1wt%, and the electron microscope pictures can reflect the surface morphology of the composites. It can be seen from the figure that the dispersed phase of the Na-MMT-added composite is larger, with an average particle size of about 3.31 μm. The dispersed phase of the composites with OMMT added is smaller, the average particle size is about 0.96 μm, and the dispersed phase distribution is more uniform.

The above description is only a preferred mode of the present invention, and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. within.

Claims (5)

1. A preparation method of epoxy group organic modified montmorillonite is characterized by comprising the following steps:

(1) dissolving epoxy chloropropane in an organic solvent, adding long-chain tertiary amine, and carrying out addition reaction to obtain epoxy quaternary ammonium salt;

(2) dispersing natural montmorillonite in deionized water to obtain montmorillonite suspension;

(3) dissolving epoxy quaternary ammonium salt in deionized water to obtain epoxy quaternary ammonium salt solution;

(4) dropwise adding epoxy quaternary ammonium salt solution into the montmorillonite suspension, and modifying montmorillonite through ion exchange reaction to obtain an initial product;

(5) centrifuging, washing, drying and refining the primary product to obtain powdery epoxy group organic modified montmorillonite;

in the step (1), the mol ratio of epoxy chloropropane to long-chain tertiary amine is 1.2: 1-1.5: 1;

in the step (4), the dosage of the epoxy quaternary ammonium salt is 1-5 times of the cation exchange capacity of the natural montmorillonite;

the long-chain tertiary amine is C₁₂～C₁₈An alkyl dimethyl tertiary amine;

the natural montmorillonite is sodium montmorillonite.

2. The method for preparing epoxy group organically modified montmorillonite as claimed in claim 1, wherein:

in the step (1), the reaction temperature is 60-70 ℃, and the reaction time is 3-5 h.

3. The method for preparing epoxy group organically modified montmorillonite as claimed in claim 1, wherein:

in the step (4), the modification reaction temperature is 60-70 ℃, and the reaction time is 5-7 h.

4. The application of the epoxy group organically modified montmorillonite prepared according to any one of claims 1 to 3 is characterized in that:

the epoxy group organic modified montmorillonite is added into a biodegradable polyester blending system in a melt blending mode to obtain the reinforced composite material.

5. The use as claimed in claim 4, wherein:

the addition amount of the epoxy group organic modified montmorillonite is 0.5 wt% -1.5 wt%.

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