Antiskid, oil-resistant and wear-resistant rubber sole material and preparation method thereof

Abstract

The invention discloses an antiskid, oil-resistant and wear-resistant rubber sole material and a preparation method thereof, and relates to the technical field of high polymer materials. Comprising the following raw materials in parts by mass: 100 parts of ethylene propylene diene monomer, 20-30 parts of acrylate rubber, 5-7 parts of modified nano silicon dioxide, 5-7 parts of a graphene compound, 3-4 parts of hydroxylated multi-walled carbon nanotubes, 2-3 parts of an anti-aging agent, 2-3 parts of sulfur, 0.8-1 part of an accelerant CBS, 10-15 parts of a composite flame retardant and 2-3 parts of zinc stearate. By introducing the composite flame retardant prepared from ammonium polyphosphate, expanded graphite and other components, the flame retardance of the sole material is effectively improved; due to the introduction of the modified nano silicon dioxide, the graphene compound, the hydroxylated multi-walled carbon nanotubes and other components, the skid resistance, wear resistance, aging resistance and flame retardance of the sole material are further improved. Therefore, the method has a wider application prospect.

Claims

1. A non-slip, oil-resistant and wear-resistant rubber sole material, characterized in that: The invention comprises the following raw materials in parts by weight: 100 parts of EPDM rubber, 20-30 parts of acrylic rubber, 5-7 parts of modified nano-silica, 5-7 parts of graphene composite, 3-4 parts of hydroxylated multi-walled carbon nanotubes, 2-3 parts of antioxidant, 2-3 parts of sulfur, 0.8-1 part of accelerator CBS, 10-15 parts of composite flame retardant, and 2-3 parts of zinc stearate; The preparation method of the modified nano-silica is as follows: Adding nano-silica and silane coupling agent KH-550 to anhydrous ethanol and performing ultrasonic treatment at 38-42° C. for 30-40 minutes, then removing ethanol by vacuum distillation, vacuum drying, grinding, and sieving to obtain modified nano-silica; The preparation method of the graphene composite is as follows: Adding graphene oxide to N,N-dimethylformamide at 48-52° C. and ultrasonically treating the mixture for 2-3 hours under a nitrogen atmosphere, then adding 1-ethyl-(3-dimethylaminopropyl)carbodiimide and N-hydroxysuccinimide and stirring the mixture at 20-25° C. for 30-40 minutes, then adding amino-terminated hyperbranched polyamide and stirring the mixture at 58-62° C. under a nitrogen atmosphere for 12-13 hours, centrifuging, washing the precipitate, and vacuum drying the mixture to obtain a graphene composite; The preparation method of the hydroxylated multi-walled carbon nanotubes is as follows: Multi-walled carbon nanotubes are added to concentrated sulfuric acid and ultrasonically treated for 30-40 minutes. A hydrogen peroxide solution is then added dropwise at 0-5°C, and then the temperature is raised to 58-62°C and stirred for reaction for 6-7 hours. The reaction is then stirred at 78-82°C for 12-12.5 hours. After cooling to 25-35°C, the mixture is diluted with a sodium bicarbonate solution to a pH of 7. Finally, the mixture is filtered, washed, precipitated, and vacuum dried to obtain hydroxylated multi-walled carbon nanotubes. The preparation method of the composite flame retardant is as follows: A1: Add vanillin and silane coupling agent KH-550 to anhydrous ethanol and reflux with stirring at 48-52°C for 4-5 hours. Then add flame retardant DOPO and anhydrous ethanol and stir at 88-92°C for 12-16 hours. Then, remove the ethanol by vacuum distillation, wash the precipitate, and vacuum dry to obtain a modified flame retardant. A2: Add modified flame retardant and anhydrous ethanol to ammonium polyphosphate and expanded graphite and perform ultra-high-speed shearing for 30-40 minutes. Then, dry and sieve to obtain a composite flame retardant.

2. The anti-skid, oil-resistant and wear-resistant rubber sole material according to claim 1, characterized in that: The mass ratio of the anhydrous ethanol, nano-silica and silane coupling agent KH-550 is 200:15-20:1-2.

3. The anti-skid, oil-resistant and wear-resistant rubber sole material according to claim 1, characterized in that: The mass ratio of the N,N-dimethylformamide, graphene oxide, 1-ethyl-(3-dimethylaminopropyl)carbodiimide, N-hydroxysuccinimide and amino-terminated hyperbranched polyamide is 400-500: 1-1.4: 2.5-3: 1.5-2: 6-8.

4. The anti-skid, oil-resistant and wear-resistant rubber sole material according to claim 1, characterized in that: The mass ratio of the concentrated sulfuric acid, multi-walled carbon nanotubes, and hydrogen peroxide solution is 276-368:3-4:222-333; The mass fraction of the concentrated sulfuric acid is 98%; The mass fraction of the hydrogen peroxide solution is 30%.

5. The anti-skid, oil-resistant and wear-resistant rubber sole material according to claim 1, characterized in that: The mass ratio of anhydrous ethanol, vanillin, silane coupling agent KH-550, flame retardant DOPO, and anhydrous ethanol in A1 is 150-200: 15.2-20.2: 22.1-29.5: 21.6-28.8: 50-66.6; The mass ratio of the ammonium polyphosphate, expanded graphite, modified flame retardant and anhydrous ethanol in A2 is 5-7:5-7:0.5-1:10-15.

6. A method for preparing the anti-skid, oil-resistant and wear-resistant rubber sole material according to any one of claims 1 to 5, characterized in that: The following steps are involved: The EPDM rubber and the acrylate rubber are put into an internal mixer and premixed at 78-82° C. for 5-7 minutes. Then, modified nano-silica, graphene composite, hydroxylated multi-walled carbon nanotubes and antioxidant are added in sequence and internally mixed at 120-125° C. for 10-15 minutes. The mixture is then transferred to an open mixer and thin-passed for 5-7 times with a roller temperature of 50° C. and a roller distance of 2 mm. Finally, sulfur, accelerator CBS, composite flame retardant and zinc stearate are added and mixed for 10-15 minutes. After the sheet is cooled, it is vulcanized at 160-170° C. and 15 MPa for 35-40 minutes. After cooling, the sheet is demoulded to obtain a non-slip, oil-resistant and wear-resistant rubber sole material.