Use of a SiO2 / C composite in the tread of a low heat generating tire

Abstract

The application belongs to the technical field of rubber tires, and discloses application of SiO2 / C composite material in a low-heat-generation tire tread.The low-heat-generation tire tread comprises the following raw materials in parts by mass: 100 parts of rubber, 0-50 parts of filler, 10-60 parts of SiO2 / C composite material, 3-8 parts of activator, 2-4 parts of vulcanizing agent, 2-5 parts of antioxidant, 0.5-1.5 parts of microcrystalline wax and 1-3 parts of silane coupling agent.In the application, the biobased SiO2 / C composite material can effectively replace carbon black and white carbon black in the tire preparation process, and the prepared tire has low heat generation.

Description

Technical Field

[0001] This invention relates to the field of rubber tire technology, and in particular to the application of a SiO2 / C composite material in low-heat tire treads. Background Technology

[0002] In recent years, the blending of carbon black and silica has been used to reduce the rolling resistance of green tires. However, due to the different surface polarities of carbon black and silica, their dispersion is extremely difficult. To address the dispersion problem of blended fillers, Cabot developed E2C carbon black-silica dual-phase carbon black in earlier years, which showed excellent results. The prepared dual-phase carbon black generated low heat when applied to tires, but its production cost was high and its stability was poor, preventing its commercialization to date. Evy also developed a wet-process compounding method to prepare carbon black-silica masterbatch, solving the dispersion problem of carbon black and silica. The resulting tires generated low heat, but this method uses a solvent, resulting in high production costs, difficulty in solvent removal, and low modulus and poor wear resistance in the prepared rubber composition. However, bio-based carbon black-silica dual-phase fillers have not yet been developed. Summary of the Invention

[0003] The purpose of this invention is to provide an application of SiO2 / C composite material in low-heat tire treads to solve the problem of difficult dispersion of carbon black and silica.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0005] This invention provides an application of SiO2 / C composite material in low-heat-generating tire tread, wherein the low-heat-generating tire tread comprises the following raw materials in parts by weight:

[0006] 100 parts rubber, 0-50 parts filler, 10-60 parts SiO2 / C composite material, 3-8 parts activator, 2-4 parts vulcanizing agent, 2-5 parts antioxidant, 0.5-1.5 parts microcrystalline wax, and 1-3 parts silane coupling agent.

[0007] Preferably, in the application of the above-mentioned SiO2 / C composite material in low-heat-generating tire treads, the preparation method of the SiO2 / C composite material includes the following steps:

[0008] (1) Mix the edible fungus culture medium with porous silica to obtain a silica composite edible fungus culture medium;

[0009] The silica composite edible fungus culture medium is mixed with edible fungi for edible fungus cultivation; after cultivation is completed, the edible fungi are removed and the waste culture medium is retained.

[0010] (2) Carbonize the waste culture body described in step (1) to obtain SiO2 / C composite material.

[0011] Preferably, in the application of the above-mentioned SiO2 / C composite material in low-heat tire tread, the rubber is one or more of natural rubber, styrene-butadiene rubber, and cis-butadiene rubber.

[0012] Preferably, in the application of the above-mentioned SiO2 / C composite material in low heat generation tire tread, the filler is one or two of carbon black and silica;

[0013] The carbon black is one or two of N134, N220, N234, N375, N347 and N339;

[0014] The silica is one or both of GR175 and GR1165.

[0015] Preferably, in the application of the above-mentioned SiO2 / C composite material in low heat generation tire tread, the vulcanizing agent is one or more of sulfur, Si-69 and accelerator NS and accelerator CZ.

[0016] The antioxidant is one or more of antioxidant 4020, antioxidant RD, and antioxidant DTPD.

[0017] Preferably, in the application of the above-mentioned SiO2 / C composite material in low-heat tire tread, the silane coupling agent is one or more of bis-[3-(triethoxysilyl)propyl]-tetrasulfide, bis(triethoxysilylpropyl)disulfide, and mercaptosilane.

[0018] Preferably, in the application of the above-mentioned SiO2 / C composite material in low-heat tire tread, the activator is stearic acid, zinc oxide, zinc stearate, or zinc lignin salt.

[0019] Preferably, in the application of the above-mentioned SiO2 / C composite material in low-heat-generating tire tread, the method for preparing the low-heat-generating tire tread includes the following steps:

[0020] Rubber, filler, SiO2 / C composite material, activator, antioxidant and microcrystalline wax are mixed and subjected to first mixing to obtain masterbatch;

[0021] The masterbatch and vulcanizing agent are mixed and then subjected to a second mixing process to obtain a low-heat tire tread.

[0022] As can be seen from the above technical solution, compared with the prior art, the present invention has the following beneficial effects:

[0023] This invention provides an application of SiO2 / C composite material in low-heat-generating tire treads. The bio-based SiO2 / C composite material can effectively replace carbon black and silica in tire manufacturing, resulting in tires with low heat generation. The mechanism of action of this invention is as follows: The carbonization of edible fungi organically combines with SiO2, forming SiO2 / C composite aggregates with high dispersibility, reducing filler payback and thus reducing heat generation. Secondly, this invention uses porous silica material, resulting in high binding between SiO2 and C, enhancing the reinforcing effect of the filler. Simultaneously, the porous material bonds well with rubber, enhancing the interaction between rubber and filler, further strengthening the reinforcing effect of the filler and reducing molecular chain slippage in the low-heat-generating tire tread, thereby reducing heat generation. The preparation cost of the bio-based silica two-phase filler of this invention is low, and the entire process is environmentally friendly. Different bio-based silica two-phase fillers can be prepared by adjusting the structure of the carbon black as needed.

[0024] Since the tire tread comes into contact with the ground, the tread compound needs to have good wear resistance and anti-skid properties. The C in the SiO2 / C composite material used in this invention must have the characteristics of large specific surface area, high structure, and small particle size to meet the requirements of the tire tread. Detailed Implementation

[0025] This invention provides an application of SiO2 / C composite material in low-heat-generating tire tread, wherein the low-heat-generating tire tread comprises the following raw materials in parts by weight:

[0026] 100 parts rubber, 0-50 parts filler, 10-60 parts SiO2 / C composite material, 3-8 parts activator, 2-4 parts vulcanizing agent, 2-5 parts antioxidant, 0.5-1.5 parts microcrystalline wax, and 1-3 parts silane coupling agent.

[0027] In this invention, the mass fraction of the filler in the low heat generation tire tread is preferably 0 to 50 parts, more preferably 10 to 40 parts, and even more preferably 20 to 35 parts.

[0028] In this invention, the mass fraction of the SiO2 / C composite material in the low heat generation tire tread is preferably 10 to 60 parts, more preferably 15 to 50 parts, and even more preferably 25 to 35 parts.

[0029] In this invention, the mass fraction of the activator in the low-heat-generating tire tread is preferably 3 to 8 parts, more preferably 4 to 7 parts, and even more preferably 5 to 6 parts.

[0030] In this invention, the mass fraction of the vulcanizing agent in the low heat generation tire tread is preferably 2 to 4 parts, more preferably 2.5 to 3.8 parts, and even more preferably 2.9 to 3.5 parts.

[0031] In this invention, the antioxidant in the low-heat-generating tire tread is preferably 2 to 5 parts by mass, more preferably 2.5 to 4.5 parts, and even more preferably 3 to 4 parts.

[0032] In this invention, the mass fraction of microcrystalline wax in the low heat-generating tire tread is preferably 0.5 to 1.5 parts, more preferably 0.8 to 1.3 parts, and even more preferably 1 to 1.2 parts.

[0033] In this invention, the mass fraction of the silane coupling agent in the low heat-generating tire tread is preferably 1 to 3 parts, more preferably 1.5 to 2.5 parts, and even more preferably 1.8 to 2 parts.

[0034] In this invention, the preparation method of the SiO2 / C composite material includes the following steps:

[0035] (1) Mix the edible fungus culture medium with porous silica to obtain a silica composite edible fungus culture medium;

[0036] The silica composite edible fungus culture medium is mixed with edible fungi for edible fungus cultivation; after cultivation is completed, the edible fungi are removed and the waste culture medium is retained.

[0037] (2) Carbonize the waste culture body described in step (1) to obtain SiO2 / C composite material.

[0038] In this invention, the edible fungus cultivation medium in step (1) preferably includes a biomass carbon source. The biomass carbon source includes, but is not limited to, one or more of cottonseed hulls, corn cobs, leaf and wood chips, soybean straw powder, wheat straw powder, peanut shells, wheat bran, and rice bran.

[0039] In this invention, the source of the edible fungus culture medium in step (1) is not limited, and commercially available or non-commercially available products known to those skilled in the art can be used.

[0040] In this invention, the porous silica in step (1) preferably includes one or more of silica lattice powder, carbonaceous silage, diatomaceous earth, diatom shale, opal, zeolite and montmorillonite, more preferably silica lattice powder, diatomaceous earth, diatom shale, opal, zeolite or montmorillonite, and more preferably silica lattice powder.

[0041] In this invention, the preferred grade of the carbon pyrite is TSI-A5008.

[0042] In this invention, the particle size of the porous silica in step (1) is preferably 500 nm to 100 μm, more preferably 500 nm to 50 μm, and even more preferably 500 nm to 10 μm; the specific surface area is preferably 60 to 500 m². 2 / g, further preferably 60-300m2 / g, more preferably 60-200m 2 / g; pore size preferably 2–100 nm; porosity preferably 0.1–5 cm³. 3 / g, more preferably 0.1–3cm 3 / g, more preferably 0.1-2cm 3 / g.

[0043] In this invention, the mass ratio of the porous silica to the edible fungus culture body in step (1) is preferably 1:1 to 10, more preferably 1:2 to 4, and even more preferably 1:2.

[0044] In this invention, step (1) preferably includes sterilizing the silica composite edible fungus culture before mixing it with edible fungi.

[0045] In this invention, the sterilization conditions are not limited, and any method well known to those skilled in the art can be used. Specifically, in this embodiment of the invention, the sterilization process is performed at 120°C for 1.5 hours or more.

[0046] In this invention, the edible fungi mentioned in step (1) are preferably including, but not limited to, shiitake mushrooms, oyster mushrooms, or wood ear mushrooms. Preferably, in this embodiment of the invention, wood ear mushrooms are used as an example for cultivation.

[0047] In this invention, the time required to complete the cultivation in step (1) is preferably ≥3 months, more preferably ≥3.5 months, and even more preferably 4 months.

[0048] In this invention, step (2) preferably further includes, before carbonization, the waste culture medium from step (1) being naturally dried. The natural drying time is preferably 5 to 24 hours, more preferably 12 to 24 hours, and even more preferably 24 hours.

[0049] In this invention, the equipment used for carbonization in step (2) is preferably a carbonization furnace.

[0050] In this invention, in step (2), the carbonization is preferably carried out under a protective atmosphere; the protective atmosphere is preferably at least one of nitrogen or argon, more preferably nitrogen or argon, and even more preferably nitrogen.

[0051] In this invention, in step (2), the carbonization temperature is preferably 600-950°C, more preferably 700-900°C, and even more preferably 800°C; the time is preferably 10-60 min, more preferably 30-60 min, and even more preferably 60 min; the rate of heating to the desired carbonization temperature is preferably 5-15°C / min, more preferably 5-10°C / min, and even more preferably 5°C / min.

[0052] In this invention, the carbonization process in step (2) preferably further includes sequential crushing and sieving.

[0053] In this invention, the crushing equipment is preferably a planetary ball mill.

[0054] In this invention, the crushing speed in step (2) is preferably 300-700 r / min, more preferably 400-600 r / min, and even more preferably 500 r / min; the time is preferably 15-60 min, more preferably 20-40 min, and even more preferably 30 min.

[0055] In this invention, the screening equipment is preferably a centrifugal classifier.

[0056] In this invention, the particle size D of the sieving in step (2) is... 50 Preferably, the wavelength is 500 nm to 45 μm, more preferably 500 nm to 20 μm, and even more preferably 500 nm to 10 μm.

[0057] In this invention, the rubber is preferably one or more of natural rubber, styrene-butadiene rubber and cis-butadiene rubber, more preferably one or two of natural rubber and styrene-butadiene rubber, and even more preferably natural rubber.

[0058] In this invention, the filler is preferably one or two of carbon black and silica, more preferably silica.

[0059] In this invention, the carbon black is preferably one or two of N134, N220, N234, N375, N347 and N339, more preferably one or two of N234, N375 and N347, and more preferably N234.

[0060] In this invention, the silica is preferably one or both of GR175 and GR1165, more preferably GR175; the silica is purchased from Quecheng Silicon Chemical Co., Ltd.

[0061] In this invention, the vulcanizing agent is preferably one or more of sulfur, Si-69 and accelerator NS and accelerator CZ, more preferably one or more of sulfur, accelerator NS and accelerator CZ, and even more preferably one or two of accelerator NS and accelerator CZ.

[0062] In this invention, the antioxidant is preferably one or more of antioxidant 4020, antioxidant RD, and antioxidant DTPD, more preferably one or two of antioxidant 4020 and antioxidant RD, and even more preferably antioxidant 4020.

[0063] In this invention, the silane coupling agent is preferably one or more of bis-[3-(triethoxysilyl)propyl]-tetrasulfide, bis(triethoxysilylpropyl)disulfide, and mercaptosilane, more preferably one or two of bis-[3-(triethoxysilyl)propyl]-tetrasulfide and mercaptosilane, and even more preferably bis-[3-(triethoxysilyl)propyl]-tetrasulfide;

[0064] When the silane coupling agent is a mixture of bis-[3-(triethoxysilane)propyl]-tetrasulfide and mercaptosilane, the ratio of bis-[3-(triethoxysilane)propyl]-tetrasulfide to mercaptosilane is preferably 3:1 to 1:1, more preferably 2.5:1 to 1.2:1, and even more preferably 2:1 to 1.5:1.

[0065] In this invention, the activator is preferably stearic acid, zinc oxide, zinc stearate or zinc lignin salt, more preferably stearic acid, zinc oxide or zinc stearate, and even more preferably stearic acid or zinc oxide.

[0066] In this invention, the zinc lignin salt was prepared with reference to CN115678038B.

[0067] In this invention, the method for preparing the low-heat-generating tire tread includes the following steps:

[0068] Rubber, filler, SiO2 / C composite material, activator, antioxidant and microcrystalline wax are mixed and subjected to first mixing to obtain masterbatch;

[0069] The masterbatch and vulcanizing agent are mixed and then subjected to a second mixing process to obtain a low-heat tire tread.

[0070] In this invention, the first mixing process is as follows:

[0071] Rubber, filler, SiO2 / C composite material, activator, antioxidant and microcrystalline wax are put into an internal mixer. The speed of the internal mixer is set to 45-55 rpm. Mix for 30-50 seconds, then mix for 20-30 seconds by lifting and pressing the plug. Mix until 150-165℃ and discharge the rubber.

[0072] The rotational speed of the internal mixer is preferably 45-55 rpm, more preferably 48-53 rpm, and even more preferably 50-52 rpm;

[0073] The mixing time is 30-50 seconds, more preferably 35-45 seconds, and even more preferably 38-40 seconds;

[0074] The mixing process involves lifting and pressing the plug for 20–30 seconds, more preferably 22–27 seconds, and even more preferably 24–26 seconds.

[0075] The mixture is then discharged at 150–165°C, more preferably 152–162°C, and even more preferably 155–160°C.

[0076] In this invention, the second mixing process is as follows:

[0077] Add the masterbatch and vulcanizing agent into the internal mixer, set the speed of the internal mixer to 25-35 rpm, mix for 30-50 seconds, then mix by lifting and pressing the plug for 20-30 seconds, and finally mix by lifting and pressing the plug until the temperature reaches 105-115℃ and the rubber is discharged.

[0078] The internal mixer rotates at a speed of 25–35 rpm, more preferably 26–33 rpm, and even more preferably 28–30 rpm;

[0079] The mixing time is 30–50 s, more preferably 32–48 s, and even more preferably 35–45 s;

[0080] The mixing process involves lifting and pressing the plug for 20–30 seconds, more preferably 22–27 seconds, and even more preferably 24–26 seconds.

[0081] The mixture is then discharged at 105–115°C, more preferably 107–113°C, and even more preferably 110–112°C.

[0082] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0083] The following embodiments illustrate a method for preparing SiO2 / C composite materials, comprising the following steps:

[0084] 2 kg of Auricularia auricula-judae culture medium (source: Science and Technology Demonstration Park of Dongjingcheng Forestry Bureau, Heilongjiang Province) was mixed with 200 g of silica powder (D 50 -8μm, model TSI-1, manufactured by Harbin Silicon Ge New Materials Co., Ltd., particle size 500nm~10μm, specific surface area 60~200m² 2 / g, pore size 2–100 nm, porosity 0.1–2 cm³ 3 Mix (g) evenly to obtain silica composite edible fungi culture medium;

[0085] After sterilizing the silica composite edible fungus culture at 120℃ for 1.5 hours, Auricularia auricula-judae was inoculated into the silica composite edible fungus culture for cultivation. After 3 months of cultivation, the mature Auricularia auricula-judae was removed and the waste culture was retained.

[0086] The waste culture medium was naturally dried for 24 hours, then placed in a carbonization furnace and carbonized at 800℃ for 60 minutes under nitrogen protection at a heating rate of 5℃ / min. The resulting silicon-carbon composite was then ball-milled in a planetary ball mill at 500 rpm for 30 minutes. The ball-milled sample was then sieved by a centrifugal classifier to determine the particle size D. 50 Samples with a diameter ≤3μm were used to obtain SiO2 / C composite materials.

[0087] Example 1

[0088] The low-heat-generating tire tread comprises the following raw materials in parts by weight:

[0089] 100 parts natural rubber, 0 parts filler, 50 parts SiO2 / C composite material, 2 parts stearic acid and 4 parts zinc oxide activator, 1 part sulfur vulcanizing agent and 1.9 parts NS accelerator, 1.5 parts antioxidant 4020 and 1.0 part RD, 1 part microcrystalline wax, and 1.5 parts silane coupling agent bis-[3-(triethoxysilyl)propyl]-tetrasulfide;

[0090] A method for preparing a low-heat-generating tire tread includes the following steps:

[0091] Natural rubber, SiO2 / C composite material, silane coupling agent, activator stearic acid, zinc oxide, antioxidant 4020, RD and microcrystalline wax are put into a mixer. The speed of the mixer is set to 50 rpm and the mixture is mixed for 30 seconds. Then, the mixture is continued to be mixed at 50 rpm for 20 seconds. The rubber is discharged at 152℃ to obtain the masterbatch.

[0092] The masterbatch, vulcanizing agent sulfur, and accelerator are put into an internal mixer. The speed of the internal mixer is set to 30 rpm and the mixture is mixed for 30 seconds. Then, the mixture is continued to be mixed for 20 seconds at 30 rpm with the piston lifted and pressed. The second batch of rubber is discharged at 105°C to obtain a low-heat tire tread.

[0093] Example 2

[0094] The low-heat-generating tire tread comprises the following raw materials in parts by weight:

[0095] 100 parts natural rubber, 15 parts GR175 silica, 35 parts SiO2 / C composite material, 2 parts stearic acid and 4 parts zinc oxide activators, 1 part sulfur vulcanizing agent and 1.9 parts NS accelerator, 1.5 parts 4020 antioxidant and 1.0 part RD antioxidant, 1 part microcrystalline wax, and 1.5 parts bis-[3-(triethoxysilyl)propyl]-tetrasulfide silane coupling agent;

[0096] A method for preparing a low-heat-generating tire tread includes the following steps:

[0097] Natural rubber, GR175 silica, SiO2 / C composite material, stearic acid activator, zinc oxide, antioxidant 4020, RD and microcrystalline wax are put into a mixer. The speed of the mixer is set to 50 rpm and the mixture is mixed for 30 seconds. Then, the mixture is continued to be mixed at 50 rpm for 20 seconds. The rubber is discharged at 152℃ to obtain the masterbatch.

[0098] The masterbatch, sulfur vulcanizing agent, and accelerator are put into an internal mixer. The speed of the internal mixer is set to 30 rpm and the mixture is mixed for 30 seconds. Then, the mixture is continued to be mixed at 30 rpm with the piston lifted and pressed for 20 seconds. The second batch of rubber is discharged at 105℃ to obtain the low heat generation tire tread.

[0099] Example 3

[0100] The low-heat-generating tire tread comprises the following raw materials in parts by weight:

[0101] 100 parts natural rubber, 25 parts GR175 silica, 25 parts SiO2 / C composite material, 2 parts stearic acid and 4 parts zinc oxide activators, 1 part sulfur vulcanizing agent and 1.9 parts NS accelerator, 1.5 parts antioxidant 4020 and 1.0 part RD, 1 part microcrystalline wax, and 1.5 parts bis-[3-(triethoxysilyl)propyl]-tetrasulfide silane coupling agent;

[0102] A method for preparing a low-heat-generating tire tread includes the following steps:

[0103] Natural rubber, GR175 silica, SiO2 / C composite material, stearic acid activator, zinc oxide, antioxidant 4020, RD and microcrystalline wax are put into a mixer. The speed of the mixer is set to 50 rpm and the mixture is mixed for 30 seconds. Then, the mixture is continued to be mixed at 50 rpm for 20 seconds. The rubber is discharged at 152℃ to obtain the masterbatch.

[0104] The masterbatch, sulfur vulcanizing agent, and accelerator are put into an internal mixer. The speed of the internal mixer is set to 30 rpm and the mixture is mixed for 30 seconds. Then, the mixture is continued to be mixed at 30 rpm with the piston lifted and pressed for 20 seconds. The second batch of rubber is discharged at 105℃ to obtain the low heat generation tire tread.

[0105] Comparative Example 1

[0106] The low-heat-generating tire tread comprises the following raw materials in parts by weight:

[0107] 100 parts natural rubber, 35 parts carbon black N234, 15 parts silica GR175, 2 parts stearic acid and 4 parts zinc oxide activators, 1 part sulfur vulcanizing agent and 1.9 parts NS accelerator, 1.5 parts antioxidant 4020 and 1.0 part RD, 1 part microcrystalline wax, and 1.5 parts silane coupling agent bis-[3-(triethoxysilyl)propyl]-tetrasulfide;

[0108] A method for preparing a low-heat-generating tire tread includes the following steps:

[0109] Natural rubber, carbon black N234, silica GR175, silane coupling agent bis-[3-(triethoxysilyl)propyl]-tetrasulfide, activator stearic acid, zinc oxide antioxidant 4020, RD and microcrystalline wax were put into a mixer. The speed of the mixer was set to 50 rpm, and the mixture was mixed for 30 seconds. Then, the mixture was continued to be mixed at 50 rpm with the plug lifted and pressed for 20 seconds. The rubber was discharged at 152℃ to obtain the masterbatch.

[0110] The masterbatch, sulfur vulcanizing agent, and accelerator are put into an internal mixer. The speed of the internal mixer is set to 30 rpm and the mixture is mixed for 30 seconds. Then, the mixture is continued to be mixed at 30 rpm with the piston lifted and pressed for 20 seconds. The second batch of rubber is discharged at 105℃ to obtain the low heat generation tire tread.

[0111] Comparative Example 2

[0112] The low-heat-generating tire tread comprises the following raw materials in parts by weight:

[0113] 100 parts natural rubber, 25 parts carbon black N234, 25 parts silica GR175, 2 parts activator stearic acid and 4 parts zinc oxide, 1 part sulfur vulcanizing agent and 1.9 parts accelerator NS, 1.5 parts antioxidant 4020 and 1.0 part RD, 1 part microcrystalline wax, 1.5 parts silane coupling agent bis-[3-(triethoxysilyl)propyl]-tetrasulfide;

[0114] A method for preparing a low-heat-generating tire tread includes the following steps:

[0115] Natural rubber, carbon black N234, silica GR175, silane coupling agent bis-[3-(triethoxysilyl)propyl]-tetrasulfide, activator stearic acid, zinc oxide, antioxidant 4020, RD and microcrystalline wax are put into a mixer. The speed of the mixer is set to 50 rpm and the mixture is mixed for 30 seconds. Then, the mixture is continued to be mixed at 50 rpm with the plug lifted and pressed for 20 seconds. The rubber is discharged at 152℃ to obtain the masterbatch.

[0116] The masterbatch, sulfur vulcanizing agent, and accelerator are put into an internal mixer. The speed of the internal mixer is set to 30 rpm and the mixture is mixed for 30 seconds. Then, the mixture is continued to be mixed at 30 rpm with the piston lifted and pressed for 20 seconds. The second batch of rubber is discharged at 105℃ to obtain the low heat generation tire tread.

[0117] The performance of the low heat generation tire treads prepared in Examples 1-3 and Comparative Examples 1-2 was tested according to GB / T528-1998, and the results are shown in Table 1.

[0118] Table 1. Performance test results of low-heat tire treads in Examples 1-3 and Comparative Examples 1-2.

[0119] Comparative Example 1 Comparative Example 2 Example 1 Example 2 Example 3 Tanδ / 60℃ 0.105 0.082 0.066 0.077 0.072 M300 13.5 13.2 12.8 13.1 13.3 TB 27.9 26.8 27.2 27.5 27.4 EB% 532 526 545 531 534

[0120] Note: DMA test tanδ / 60℃ conditions 151℃×30min (test conditions frequency 20Hz, strain 10±2%, temperature scan 0℃-80℃).

[0121] As shown in Table 1, through the above Comparative Examples 1 and 2 and Examples 1, 2 and 3, it can be seen that the reinforcing effect of the SiO2 / C composite material is similar to that of carbon black N234. Through Comparative Example 1 and Example 1, it can be seen that the heat generation of the SiO2 / C composite material is reduced by 37%. Through the above examples, it can be seen that the low-heat-generating tire tread prepared using the SiO2 / C composite material possesses low-heat-generating performance.

[0122] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An application of a SiO2 / C composite material in low-heat-generating tire treads, characterized in that, The low-heat-generating tire tread comprises the following raw materials in parts by weight: 100 parts rubber, 0-50 parts filler, 10-60 parts SiO2 / C composite material, 3-8 parts activator, 2-4 parts vulcanizing agent, 2-5 parts antioxidant, 0.5-1.5 parts microcrystalline wax, and 1-3 parts silane coupling agent. The preparation method of the SiO2 / C composite material includes the following steps: (1) Mix the edible fungus culture medium with porous silica to obtain a silica composite edible fungus culture medium; The silica composite edible fungus culture medium is mixed with edible fungi for edible fungus cultivation; after cultivation is completed, the edible fungi are removed and the waste culture medium is retained. (2) Carbonize the waste culture medium described in step (1) to obtain SiO2 / C composite material; The filler is one or two of carbon black and silica; the carbon black is one or two of N134, N220, N234, N375, N347 and N339; the silica is one or two of GR175 and GR1165.

2. The application of the SiO2 / C composite material according to claim 1 in low-heat tire tread, characterized in that, The rubber is one or more of natural rubber, styrene-butadiene rubber, and butadiene rubber.

3. The application of the SiO2 / C composite material according to claim 1 in low-heat tire tread, characterized in that, The vulcanizing agent is one or more of sulfur, Si-69, and accelerators NS and CZ. The antioxidant is one or more of antioxidant 4020, antioxidant RD, and antioxidant DTPD.

4. The application of the SiO2 / C composite material according to claim 2 in low-heat-generating tire treads, characterized in that, The silane coupling agent is one or more of bis-[3-(triethoxysilyl)propyl]-tetrasulfide, bis(triethoxysilylpropyl)disulfide, and mercaptosilane.

5. The application of the SiO2 / C composite material according to claim 1 or 2 in low-heat-generating tire treads, characterized in that, The activator is stearic acid, zinc oxide, zinc stearate, or zinc lignin salt.

6. The application of the SiO2 / C composite material according to claim 3 in low-heat-generating tire tread, characterized in that, The method for preparing the low-heat-generating tire tread includes the following steps: Rubber, filler, SiO2 / C composite material, activator, antioxidant and microcrystalline wax are mixed and subjected to first mixing to obtain masterbatch; The masterbatch and vulcanizing agent are mixed and then subjected to a second mixing process to obtain a low-heat tire tread.