A preparation method and application of environmentally friendly PGE

Abstract

The present application discloses a preparation method and application of environmentally friendly PGE, relates to the technical field of organic polymer compounds, and comprises the following steps: step 1, 80-100 parts of polyurethane, 60-80 parts of DPEM, 0.1-1 parts of modified graphene and 0.05-0.15 parts of filler are mixed and stirred to obtain a premixed stirring body; step 2, 0.01-0.2 parts of butylene formic acid are added to the premixed stirring body, and environmentally friendly PGE materials are obtained after stirring reaction. The present application has the dispersion performance of modified graphene in polyurethane and DPEM synergistically promoted by modified graphene and butylene formic acid, and then promotes the interfacial structural strength between modified graphene, filler and polyurethane and DPEM, significantly improves the wear resistance and weather resistance of the environmentally friendly PGE prepared by the preparation method of the environmentally friendly PGE, with low cost and long service life.

Description

Technical Field

[0001] The present application relates to the technical field of organic polymer compounds, and in particular to a preparation method and application of environmentally friendly PGE. Background Art

[0002] Plastic tracks are generally composed of polyurethane prepolymer, mixed polyether, waste tire rubber, EPDM rubber particles or PU particles, pigments, additives, and fillers. They have the characteristics of good flatness, high compressive strength, appropriate hardness and elasticity, and stable physical properties.

[0003] The Chinese patent application document with publication number CN110396169A discloses a method for preparing a wear-resistant plastic runway casting material, which comprises the following steps: S1, preparing raw materials: the components of the wear-resistant plastic runway casting material are as follows: polyether polyol, filler, polyisocyanate, MDI, graphene, polyurethane vulcanizer, antioxidant, plasticizer, catalyst, stabilizer and pigment, the above raw materials are composed of The weight of the polyether polyol is 35-50 parts, the filler is 20-38 parts, the polyisocyanate is 10-30 parts, the MDI is 10-25 parts, the graphene is 10-16 parts, the polyurethane vulcanizer is 2-4 parts, the antioxidant is 0.5-1 parts, the plasticizer is 15-28 parts, the catalyst is 1-2 parts, the stabilizer is 1-2 parts, and the pigment is 3-4 parts; S2, preparation of casting material: (1) weigh the above-mentioned polyether polyol in parts by weight, and dehydrate it under vacuum at about 100°C for 1-1.5 hours, After cooling to 40°C, put it into a reactor, then add the above-mentioned weight portion of MDI into the reactor, mix it evenly to obtain a mixture, and then react the mixture at 90°C for 2 hours to obtain a mixture A for use; (2) weigh the above-mentioned weight portions of filler, polyisocyanate and polyurethane vulcanizer, add them into the reactor, stir them evenly at a temperature of 70-80°C to obtain a mixture B for use; (3) add the mixture A and the mixture B into a mixing tank, mix them evenly, heat them to 110-120°C, continue stirring for 8-10 minutes, then add the above-mentioned weight portion of graphene, stir and react for 1-2 hours, then add the above-mentioned weight portion of plasticizer to the mixture, mix and stir for 10-20 minutes, then add the above-mentioned weight portion of antioxidant, catalyst and stabilizer, stir evenly, place it in an ultrasonic ultrasonic for 10-20 minutes, then add the above-mentioned weight portion of pigment to the mixture, mix evenly and place it in a molding machine to form, so as to obtain the wear-resistant plastic track casting material.

[0004] However, in the preparation method of the wear-resistant plastic track casting material, the raw material preparation includes additives such as antioxidants, polyurethane vulcanizers and plasticizers to improve the interface structure strength between the components. The composition formula is complex and it is difficult for graphene to form a stable distribution in the polyurethane system composed of polyether polyols, polyisocyanates and MDI, resulting in limited improvement in wear resistance. Therefore, the proportion of graphene content cannot be too low, which significantly increases the manufacturing cost of the plastic track and needs to be improved. Summary of the invention

[0005] In view of this, the first purpose of this application is to provide a method for preparing environmentally friendly PGE to achieve the purpose of effectively controlling costs and improving wear resistance. The specific scheme is as follows:

[0006] A method for preparing environmentally friendly PGE comprises the following steps:

[0007] Step 1, mixing 80-100 parts by weight of polyurethane, 60-80 parts by weight of DPEM, 0.1-1 parts by weight of modified graphene and 0.05-0.15 parts by weight of filler to obtain a premixed body;

[0008] Step 2: Add 0.01-0.2 parts by weight of butylene carboxylic acid into the premixed stirring body, and obtain an environmentally friendly PGE material after stirring and reacting.

[0009] Preferably: the modified graphene is carboxylated graphene, and the preparation method comprises introducing graphene oxide into deionized water for ultrasonic stirring to obtain 0.3-0.5 mg / L of graphene oxide supernatant, then introducing sodium hydroxide into the graphene oxide supernatant to adjust the pH to greater than 7 and less than 10 to obtain an alkaline clear solution, then dropwise adding aspartic acid or glutamic acid into the alkaline clear solution, and controlling the temperature of the alkaline clear solution to 8-20° C. and stirring the reaction for 12 hours to obtain a modified mixed solution; and finally extracting the carboxylated graphene from the modified mixed solution.

[0010] Preferably, the filler is calcium carbonate or a mixture of calcium carbonate and at least one of polytetrafluoroethylene powder, talcum powder, silicon dioxide and hollow glass microspheres, and the mass percentage of calcium carbonate in the filler is greater than 97%.

[0011] Preferably: the polyurethane is prepared by the following steps: s1, mixing and stirring 30-50 parts by weight of a polyol, 8-20 parts by weight of a diisocyanate, and 0.01-0.02 parts of an organic tin catalyst, and stirring in an inert gas reactor, preliminarily mixing and reacting to obtain a mixed material; s2, adding a chain extender to the mixed material to form a chain extension material; s3, adding 5-20 parts by weight of a terminal hydroxyl polysiloxane and 1.2-2.0 parts of triethylamine to the chain extension material, and continuing to stir the reaction to obtain a polyurethane.

[0012] Preferably: the molecular formula of the hydroxy-terminated polysiloxane is as follows:

[0013] HO(CH 2 ) a SXWh 2 O(SiOMxR 1 ) b (SiOMx 2 ) c SXWh 2 (CH 2 ) a OH

[0014] Wherein, a is 2-6, b is 2-30, c is 5-100; Mx is Me, Et or Bu; R1 is .

[0015] Preferably, the polyol is polybutylene adipate diol with a molecular weight of 1000-3000; the diisocyanate is isophorone diisocyanate, and the organotin catalyst is dibutyltin diacetate.

[0016] Preferably: the polyol is polyethylene glycol with a molecular weight of 1000-3000; the diisocyanate is hexamethylene diisocyanate, and the organotin catalyst is dibutyltin dilaurate.

[0017] Preferably, the chain extender is dimethylol propionic acid, sodium ethylenediamine sulfonate or sodium 1,4-butanediol-2-sulfonate.

[0018] Preferably: in step s1, the polyol is treated with vacuum dehydration at 100°C for 0.5-1.5h, and then the temperature is reduced to 60°C and mixed with diisocyanate and organic tin catalyst for stirring; in step s2, the reaction temperature is controlled to 55-65°C for 1-2h; in step s3, the temperature is first controlled to 65-75°C for 1.5-2h, and then the temperature is reduced to 45-55°C when triethylamine is added, and polyurethane is obtained after the reaction is carried out for 0.5-1h.

[0019] The second object of the present application is to provide an application of an environmentally friendly PGE, wherein the environmentally friendly PGE is prepared by the preparation method of the environmentally friendly PGE as described above and is applied to paving environmentally friendly plastic runway pavement.

[0020] Through the above scheme, it can be known that the present application provides a preparation method and application of an environmentally friendly PGE, which is a preparation method of an environmentally friendly PGE. The preparation method of the environmentally friendly PGE improves the dispersion performance of the modified graphene in polyurethane and DPEM by synergistically improving the modified graphene and butylene formic acid, and then promotes the interface structure strength between the modified graphene, filler, polyurethane and DPEM, and significantly improves the wear resistance and weather resistance of the environmentally friendly PGE prepared by the preparation method of the environmentally friendly PGE, which has the effect of low cost and long service life. The application of the environmentally friendly PGE has the effect of significantly improving the surface strength of the environmentally friendly plastic runway pavement, and while achieving effective elastic support, the surface wear resistance is significantly improved, and the purpose of cost control is achieved, effectively extending the service life of the environmentally friendly plastic runway pavement. DETAILED DESCRIPTION

[0021] The following will be described clearly and completely in conjunction with the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0022] It should be mentioned that the inert gas used in the technical solution of the present application is nitrogen.

[0023] The following is a detailed description of the preparation method of the environmentally friendly PGE of the present application.

[0024] A method for preparing environmentally friendly PGE comprises the following steps:

[0025] Step 1, mixing 80-100 parts by weight of polyurethane, 60-80 parts by weight of DPEM, 0.1-1 parts by weight of modified graphene and 0.05-0.15 parts by weight of filler to obtain a premixed body;

[0026] Step 2: Add 0.01-0.2 parts by weight of butylene carboxylic acid into the premixed stirring body, and obtain an environmentally friendly PGE material after stirring and reacting.

[0027] The modified graphene is carboxylated graphene, and the preparation method comprises introducing graphene oxide into deionized water for ultrasonic stirring to obtain 0.3-0.5 mg / L of graphene oxide supernatant, then introducing sodium hydroxide into the graphene oxide supernatant to adjust the pH to greater than 7 and less than 10 to obtain an alkaline clear solution, then dropwise adding aspartic acid or glutamic acid into the alkaline clear solution, and controlling the temperature of the alkaline clear solution to 8-20° C. and stirring the reaction for 12 hours to obtain a modified mixed solution; and finally extracting the carboxylated graphene from the modified mixed solution.

[0028] The filler is calcium carbonate or a mixture of calcium carbonate and at least one of polytetrafluoroethylene powder, talcum powder, silicon dioxide and hollow glass microspheres, and the mass percentage of calcium carbonate in the filler is greater than 97%.

[0029] The polyurethane is prepared by the following steps: s1, 30-50 parts by weight of a polyol, 8-20 parts by weight of a diisocyanate, and 0.01-0.02 parts by weight of an organic tin catalyst are mixed and stirred, and the stirring is carried out in an inert gas reaction kettle, and a preliminary mixing reaction is performed to obtain a mixed material; s2, a chain extender is added to the mixed material to form a chain extension material; s3, 5-20 parts by weight of a terminal hydroxyl polysiloxane and 1.2-2.0 parts of triethylamine are respectively added to the chain extension material, and the stirring reaction is continued to obtain the polyurethane.

[0030] It should be noted that the molecular formula of the hydroxy-terminated polysiloxane used is as follows:

[0031] HO(CH 2 ) a SXWh 2 O(SiOMxR 1 ) b (SiOMx 2 ) c SXWh 2 (CH 2 ) a OH

[0032] Wherein, a is 2-6, b is 2-30, c is 5-100; Mx is Me, Et or Bu; R1 is .

[0033] Of course, the polyol, diisocyanate and organotin catalyst in the embodiments of the present application are all commercially available and will not be described in detail here. The chain extender is dimethylol propionic acid, sodium ethylenediamine sulfonate or sodium 1,4-butanediol-2-sulfonate, all of which are commercially available and will not be described in detail here.

[0034] It should be mentioned that with regard to the specific preparation steps of polyurethane, in step s1, the polyol is treated with vacuum dehydration at 100°C for 0.5-1.5h, and then the temperature is reduced to 60°C and mixed with diisocyanate and organic tin catalyst for stirring; in step s2, the reaction temperature is controlled to 55-65°C for 1-2h; in step s3, the temperature is first controlled to 65-75°C for 1.5-2h, and then the temperature is reduced to 45-55°C when triethylamine is added, and polyurethane is obtained after the reaction for 0.5-1h.

[0035] The present application also claims to protect an application of an environmentally friendly PGE, which is prepared by the preparation method of the environmentally friendly PGE as described above and applied to the paving of an environmentally friendly plastic runway surface. The environmentally friendly plastic runway surface comprises environmentally friendly PGE and 10-25% by mass of a rubber plasticizer and 1-5% by mass of a compatibilizer. Both the rubber plasticizer and the compatibilizer are commercially available and will not be described in detail here.

[0036] Embodiment 1

[0037] A method for preparing environmentally friendly PGE comprises the following steps:

[0038] Step 1, 100 parts by weight of polyurethane, 80 parts by weight of DPEM, 1 part by weight of modified graphene and 0.15 parts by weight of filler are mixed and stirred to obtain a premixed body;

[0039] Step 2: Add 0.2 parts by weight of butylene formate into the premixed stirring body, and obtain an environmentally friendly PGE material after stirring and reacting.

[0040] Among them, the modified graphene is carboxylated graphene, and the preparation method includes introducing graphene oxide into deionized water for ultrasonic stirring to obtain 0.5 mg / L of graphene oxide supernatant, then introducing sodium hydroxide into the graphene oxide supernatant to adjust the pH to 9.6 to obtain an alkaline clear solution, then dropwise adding aspartic acid into the alkaline clear solution, and controlling the temperature of the alkaline clear solution to 20°C and stirring the reaction for 12 hours to obtain a modified mixed solution; finally, extracting carboxylated graphene from the modified mixed solution.

[0041] The filler is a mixture of calcium carbonate, silicon dioxide and hollow glass microspheres, wherein the mass percentage of calcium carbonate in the filler is 98%, the mass percentage of silicon dioxide in the filler is 1.5%, and the mass percentage of hollow glass microspheres in the filler is 0.5%.

[0042] The polyurethane is prepared by the following steps: s1, 50 parts by weight of a polyol, 20 parts by weight of a diisocyanate, and 0.02 parts of an organic tin catalyst are mixed and stirred in an inert gas reactor, and a preliminary mixing reaction is performed to obtain a mixed material; s2, a chain extender is added to the mixed material to form a chain extension material; s3, 20 parts by weight of a terminal hydroxyl polysiloxane and 2.0 parts of triethylamine are respectively added to the chain extension material, and the stirring reaction is continued to obtain the polyurethane.

[0043] It should be noted that the molecular formula of the hydroxy-terminated polysiloxane used is as follows:

[0044] HO(CH 2 ) a SXWh 2 O(SiOMxR1 ) b (SiOMx 2 ) c SXWh 2 (CH 2 ) a OH

[0045] Among them, a is 4, b is 16, c is 16; Mx is Me; R1 is .

[0046] In Example 1 of the present application, the polyol used is polybutylene adipate diol with a molecular weight of 2000. The diisocyanate used is isophorone diisocyanate. The organic tin catalyst used is dibutyltin diacetate, all of which are commercially available and are not described in detail here. The chain extender is commercially available sodium 1,4-butanediol-2-sulfonate, which is not described in detail here.

[0047] It should be mentioned that with regard to the specific preparation steps of polyurethane, in step s1, the polyol is treated with vacuum dehydration at 100°C for 1.5 hours, and then the temperature is reduced to 60°C and mixed with diisocyanate and organic tin catalyst for stirring; in step s2, the reaction temperature is controlled to 55°C for 2 hours; in step s3, the temperature is first controlled to 65°C for 2 hours, and then the temperature is reduced to 55°C when triethylamine is added, and polyurethane is obtained after the reaction is carried out for 0.5 hours.

[0048] The present application also claims to protect an application of environmentally friendly PGE, which is prepared by the preparation method of environmentally friendly PGE as described above and applied to the paving of environmentally friendly plastic runway surface. The environmentally friendly plastic runway surface comprises environmentally friendly PGE and 15% by mass of a rubber plasticizer and 3% by mass of a compatibilizer.

[0049] Embodiment 2

[0050] A method for preparing environmentally friendly PGE comprises the following steps:

[0051] Step 1, 80 parts by weight of polyurethane, 60 parts by weight of DPEM, 0.1 parts by weight of modified graphene and 0.05 parts by weight of filler are mixed and stirred to obtain a premixed body;

[0052] Step 2: Add 0.01 parts by weight of butylene formate into the premixed stirring body, and obtain an environmentally friendly PGE material after stirring and reacting.

[0053] Among them, the modified graphene is carboxylated graphene, and the preparation method includes introducing graphene oxide into deionized water for ultrasonic stirring to obtain 0.3 mg / L of graphene oxide supernatant, then introducing sodium hydroxide into the graphene oxide supernatant to adjust the pH to 8 to obtain an alkaline clear solution, then dropwise adding aspartic acid into the alkaline clear solution, and controlling the temperature of the alkaline clear solution to 8°C and stirring the reaction for 12 hours to obtain a modified mixed solution; finally, extracting carboxylated graphene from the modified mixed solution.

[0054] The filler is calcium carbonate. The polyurethane is prepared by the following steps: s1, 30 parts by weight of polyol, 8 parts of diisocyanate, and 0.01 parts of organic tin catalyst are mixed and stirred in an inert gas reactor, and a preliminary mixing reaction is performed to obtain a mixed material; s2, a chain extender is added to the mixed material to form a chain extension material; s3, 5 parts by weight of terminal hydroxyl polysiloxane and 1.2 parts of triethylamine are added to the chain extension material, and the stirring reaction is continued to obtain polyurethane.

[0055] It should be noted that the molecular formula of the hydroxy-terminated polysiloxane used is as follows:

[0056] HO(CH 2 ) a SXWh 2 O(SiOMxR 1 ) b (SiOMx 2 ) c SXWh 2 (CH 2 ) a OH

[0057] Among them, a is 2, b is 2, c is 5; Mx is Me; R1 is .

[0058] In Example 2 of the present application, the polyol used is polybutylene adipate diol with a molecular weight of 1000. The diisocyanate used is isophorone diisocyanate. The organic tin catalyst used is dibutyltin diacetate, which are all commercially available and are not described in detail here. The chain extender is dimethylol propionic acid, which is commercially available and is not described in detail here.

[0059] It should be mentioned that with regard to the specific preparation steps of polyurethane, in step s1, the polyol is treated with vacuum dehydration at 100°C for 0.5h, and then the temperature is reduced to 60°C and mixed with diisocyanate and organic tin catalyst for stirring; in step s2, the reaction temperature is controlled to 55°C for 2h; in step s3, the temperature is first controlled to 75°C for 1.5h, and then the temperature is reduced to 45°C when triethylamine is added, and polyurethane is obtained after the reaction is carried out for 0.5h.

[0060] The present application also claims to protect an application of environmentally friendly PGE, which is prepared by the above-mentioned preparation method of environmentally friendly PGE and applied to the paving of environmentally friendly plastic runway surface. The environmentally friendly plastic runway surface comprises environmentally friendly PGE and 20% by mass of a rubber plasticizer and 1% of a compatibilizer.

[0061] Embodiment 3

[0062] A method for preparing environmentally friendly PGE comprises the following steps:

[0063] Step 1, 90 parts by weight of polyurethane, 70 parts by weight of DPEM, 0.5 parts by weight of modified graphene and 0.1 parts by weight of filler are mixed and stirred to obtain a premixed body;

[0064] Step 2: Add 0.1 parts by weight of butylene formate into the premixed stirring body, and obtain an environmentally friendly PGE material after stirring and reacting.

[0065] Among them, the modified graphene is carboxylated graphene, and the preparation method includes introducing graphene oxide into deionized water for ultrasonic stirring to obtain 0.4 mg / L of graphene oxide supernatant, then introducing sodium hydroxide into the graphene oxide supernatant to adjust the pH to 8 to obtain an alkaline clear solution, then dripping glutamic acid into the alkaline clear solution drop by drop, and controlling the temperature of the alkaline clear solution to 11°C and stirring the reaction for 12 hours to obtain a modified mixed solution; finally, extracting carboxylated graphene from the modified mixed solution.

[0066] The filler is a mixture of calcium carbonate and polytetrafluoroethylene powder, and the mass percentage of calcium carbonate in the filler is 98%.

[0067] The polyurethane is prepared by the following steps: s1, 40 parts by weight of a polyol, 15 parts by weight of a diisocyanate, and 0.01 parts of an organic tin catalyst are mixed and stirred in an inert gas reactor, and a preliminary mixing reaction is performed to obtain a mixed material; s2, a chain extender is added to the mixed material to form a chain extension material; s3, 12 parts by weight of a terminal hydroxyl polysiloxane and 1.7 parts of triethylamine are respectively added to the chain extension material, and the stirring reaction is continued to obtain the polyurethane.

[0068] It should be noted that the molecular formula of the hydroxy-terminated polysiloxane used is as follows:

[0069] HO(CH 2 ) a SXWh 2 O(SiOMxR 1 ) b (SiOMx 2 ) c SXWh 2(CH 2 ) a OH

[0070] Among them, a is 6, b is 15, c is 33; Mx is Me; R1 is .

[0071] In Example 3 of the present application, the polyol used is polybutylene adipate diol with a molecular weight of 3000. The diisocyanate used is isophorone diisocyanate. The organic tin catalyst used is dibutyltin diacetate, all of which are commercially available and are not described in detail here. The chain extender is commercially available sodium ethylenediamine sulfonate, which is not described in detail here.

[0072] It should be mentioned that with regard to the specific preparation steps of polyurethane, in step s1, the polyol is treated with vacuum dehydration at 100°C for 1 hour, and then the temperature is reduced to 60°C and mixed with diisocyanate and organic tin catalyst for stirring; in step s2, the reaction temperature is controlled to 60°C for 1.6 hours; in step s3, the temperature is first controlled to 70°C for 1.6 hours, and then the temperature is reduced to 50°C when triethylamine is added, and polyurethane is obtained after the reaction is carried out for 0.9 hours.

[0073] The present application also claims to protect an application of environmentally friendly PGE, which is prepared by the above-mentioned preparation method of environmentally friendly PGE and applied to the paving of environmentally friendly plastic runway surface. The environmentally friendly plastic runway surface comprises environmentally friendly PGE and 30% by mass of a rubber plasticizer and 5% by mass of a compatibilizer.

[0074] Embodiment 4

[0075] A method for preparing environmentally friendly PGE comprises the following steps:

[0076] Step 1, 85 parts by weight of polyurethane, 72 parts by weight of DPEM, 0.6 parts by weight of modified graphene and 0.13 parts by weight of filler are mixed and stirred to obtain a premixed body;

[0077] Step 2: Add 0.15 parts by weight of butylene formate into the premixed stirring body, and obtain an environmentally friendly PGE material after stirring and reacting.

[0078] Among them, the modified graphene is carboxylated graphene, and the preparation method includes introducing graphene oxide into deionized water for ultrasonic stirring to obtain 0.3 mg / L of graphene oxide supernatant, then introducing sodium hydroxide into the graphene oxide supernatant to adjust the pH to 7.5 to obtain an alkaline clear solution, then adding glutamic acid dropwise into the alkaline clear solution, and controlling the temperature of the alkaline clear solution to 17°C and stirring the reaction for 12 hours to obtain a modified mixed solution; finally, extracting carboxylated graphene from the modified mixed solution.

[0079] The filler is calcium carbonate.

[0080] The polyurethane is prepared by the following steps: s1, 36 parts by weight of a polyol, 18 parts by weight of a diisocyanate, and 0.02 parts of an organic tin catalyst are mixed and stirred in an inert gas reactor, and a preliminary mixing reaction is performed to obtain a mixed material; s2, a chain extender is added to the mixed material to form a chain extension material; s3, 20 parts by weight of a terminal hydroxyl polysiloxane and 1.2 parts of triethylamine are respectively added to the chain extension material, and the stirring reaction is continued to obtain the polyurethane.

[0081] It should be noted that the molecular formula of the hydroxy-terminated polysiloxane used is as follows:

[0082] HO(CH 2 ) a SXWh 2 O(SiOMxR 1 ) b (SiOMx 2 ) c SXWh 2 (CH 2 ) a OH

[0083] Among them, a is 6, b is 3, c is 100; Mx is Me; R1 is .

[0084] Of course, in Example 4 of the present application, the polyol used is polyethylene glycol with a molecular weight of 1000. The diisocyanate used is hexamethylene diisocyanate. The organic tin catalyst used is dibutyltin dilaurate, all of which are commercially available and will not be described in detail here. The chain extender is commercially available sodium ethylenediamine sulfonate, which will not be described in detail here.

[0085] It should be mentioned that with regard to the specific preparation steps of polyurethane, in step s1, the polyol is treated with vacuum dehydration at 100°C for 0.5h, and then the temperature is reduced to 60°C and mixed with diisocyanate and organic tin catalyst for stirring; in step s2, the reaction temperature is controlled to 55°C for 1h; in step s3, the temperature is first controlled to 75°C for 1.5h, and then the temperature is reduced to 45°C when triethylamine is added, and polyurethane is obtained after the reaction for 1h.

[0086] The present application also claims to protect an application of environmentally friendly PGE, which is prepared by the preparation method of environmentally friendly PGE as described above and applied to the paving of environmentally friendly plastic runway surface. The environmentally friendly plastic runway surface comprises environmentally friendly PGE and 15% by mass of a rubber plasticizer and 3% by mass of a compatibilizer.

[0087] Comparative Example 1

[0088] The difference between Comparative Example 1 and Example 1 is that in Comparative Example 1, graphene oxide is used instead of modified graphene.

[0089] Comparative Example 2

[0090] The difference between Comparative Example 2 and Example 1 is that the polyurethane used in Comparative Example 2 is a two-component polyurethane slurry purchased from Ailete of Linglite Technology Jiangsu Co., Ltd.

[0091] Comparative Example 3

[0092] The difference between Comparative Example 3 and Example 1 is that no butenyl formic acid is added in Comparative Example 3.

[0093] Comparative Example 4

[0094] The difference between Comparative Example 4 and Example 1 is that 30 parts by weight of DPEM are added to Comparative Example 4.

[0095] test:

[0096] According to the synthetic material runway surface-GB / T 14833-2011, the site is classified as a Class I site, and performance tests are carried out on Examples 1 to 4 and Comparative Examples 1 to 4. The performance test results are shown in Table 1 below; wherein, the flame retardancy is represented by the diameter of the burning patches left on the surfaces of the five samples.

[0097] Table 1 Performance test results

[0098]

[0099] It can be seen from Table 1 above that, compared with unoxidized graphene oxide, modified graphene has the effect of improving the interface structure strength between the filler, polyurethane and DPEM, thereby improving the tensile strength while achieving the effect of improving flame retardancy and effectively increasing elongation at break; at the same time, the polyurethane in the embodiment of the present application improves the coordination with DPEM, filler and modified graphene to form an environmentally friendly plastic runway pavement with significantly improved strength, and after harmful substance testing, it is found that it meets the standard of synthetic material runway surface-GB / T 14833-2011, which is a product that significantly improves physical properties, thereby effectively extending service life and providing effective elastic support.

[0100] Based on the above embodiments and comparative examples, it can be known that the addition amount of modified graphene or graphene oxide has an effective improvement on the performance of the environmentally friendly plastic runway pavement, but too high an addition amount will lead to a significant increase in cost. Therefore, based on Example 1, Example 3, Comparative Example 1 and Comparative Example 2, it can be seen that even if the amount of modified graphene in Example 3 of the present application is less than that in Example 1, it achieves effective performance improvement when combined with modified graphene, polyurethane and butylene formic acid, so it is suitable for reducing the content of modified graphene and achieving the purpose of reducing costs.

[0101] Through the above scheme, it can be known that the present application provides a preparation method and application of an environmentally friendly PGE, which is a preparation method of an environmentally friendly PGE. The preparation method of the environmentally friendly PGE improves the dispersion performance of the modified graphene in polyurethane and DPEM by synergistically improving the modified graphene and butylene formic acid, and then promotes the interface structure strength between the modified graphene, filler, polyurethane and DPEM, and significantly improves the wear resistance and weather resistance of the environmentally friendly PGE prepared by the preparation method of the environmentally friendly PGE, which has the effect of low cost and long service life. The application of the environmentally friendly PGE has the effect of significantly improving the surface strength of the environmentally friendly plastic runway pavement, and while achieving effective elastic support, the surface wear resistance is significantly improved, and the purpose of cost control is achieved, effectively extending the service life of the environmentally friendly plastic runway pavement.

[0102] The "first", "second", "third", "fourth", etc. (if any) referred to in this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, or devices.

[0103] It should be noted that the descriptions involving "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0104] Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A method for preparing environmentally friendly PGE, characterized in that: The steps include: Step 1, mixing 80-100 parts by weight of polyurethane, 60-80 parts by weight of DPEM, 0.1-1 parts by weight of modified graphene and 0.05-0.15 parts by weight of filler to obtain a premixed body; Step 2, adding 0.01-0.2 parts by weight of butylene formate to the premixed stirring body, and obtaining an environmentally friendly PGE material after stirring and reacting; The modified graphene is carboxylated graphene, and the preparation method comprises introducing graphene oxide into deionized water for ultrasonic stirring to obtain 0.3-0.5 mg / L of graphene oxide supernatant, then introducing sodium hydroxide into the graphene oxide supernatant to adjust the pH to greater than 7 and less than 10 to obtain an alkaline clear solution, then dropwise adding aspartic acid or glutamic acid into the alkaline clear solution, and controlling the temperature of the alkaline clear solution to 8-20° C. and stirring the reaction for 12 hours to obtain a modified mixed solution; and finally extracting the carboxylated graphene from the modified mixed solution.

2. The method for preparing an environmentally friendly PGE according to claim 1, characterized in that: The filler is calcium carbonate or a mixture of calcium carbonate and at least one of polytetrafluoroethylene powder, talcum powder, silicon dioxide and hollow glass microspheres, and the mass percentage of calcium carbonate in the filler is greater than 97%.

3. The method for preparing an environmentally friendly PGE according to claim 1, characterized in that: The polyurethane is prepared by the following steps: s1, 30-50 parts by weight of polyol, 8-20 parts by weight of diisocyanate, and 0.01-0.02 parts of an organic tin catalyst are mixed and stirred, and the stirring is carried out in an inert gas reactor, and a preliminary mixing reaction is performed to obtain a mixed material; s2, a chain extender is added to the mixed material to form a chain extension material; s3, 5-20 parts by weight of terminal hydroxyl polysiloxane and 1.2-2.0 parts of triethylamine are respectively added to the chain extension material, and the stirring reaction is continued to obtain the polyurethane.

4. The method for preparing an environmentally friendly PGE according to claim 3, characterized in that: The molecular formula of the hydroxy-terminated polysiloxane is as follows: HO(CH2) a SiMx2O(SiOMxR1) b (SiOMx2) c SiMx2(CH2) a OH Wherein, a is 2-6, b is 2-30, c is 5-100; Mx is Me, Et or Bu; R1 is .

5. The method for preparing an environmentally friendly PGE according to claim 3, characterized in that: The polyol is polybutylene adipate diol with a molecular weight of 1000-3000; the diisocyanate is isophorone diisocyanate, and the organic tin catalyst is dibutyltin diacetate.

6. The method for preparing an environmentally friendly PGE according to claim 3, characterized in that: The polyol is polyethylene glycol with a molecular weight of 1000-3000; the diisocyanate is hexamethylene diisocyanate, and the organic tin catalyst is dibutyltin dilaurate.

7. The method for preparing an environmentally friendly PGE according to claim 3, characterized in that: The chain extender is dimethylol propionic acid, sodium ethylenediamine sulfonate or sodium 1,4-butanediol-2-sulfonate.

8. The method for preparing an environmentally friendly PGE according to claim 3, characterized in that: In step s1, the polyol is treated with vacuum dehydration at 100° C. for 0.5-1.5 h, and then the temperature is reduced to 60° C. and mixed with diisocyanate and an organic tin catalyst for stirring; in step s2, the reaction temperature is controlled to 55-65° C. and the reaction is carried out for 1-2 h; in step s3, the temperature is first controlled to 65-75° C. and the reaction is carried out for 1.5-2 h, and then the temperature is reduced to 45-55° C. when triethylamine is added, and the polyurethane is obtained after the reaction is carried out for 0.5-1 h.

9. An application of environmentally friendly PGE, characterized by: The environmentally friendly PGE is prepared by the preparation method of the environmentally friendly PGE as described in any one of claims 1 to 8 and is used for paving environmentally friendly plastic runway pavement.

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