Application of SiO2 / C composite material in low-heat tire tread

Abstract

The invention belongs to the technical field of rubber tires, and discloses application of a SiO2 / C composite material in a low-heat-generation tire tread. The low-heat tire tread is prepared from the following raw materials in parts by mass: 100 parts of rubber, 0-50 parts of filler, 10-60 parts of a SiO2 / C composite material, 3-8 parts of an activating agent, 2-4 parts of a vulcanizing agent, 2-5 parts of an anti-aging agent, 0.5-1.5 parts of microcrystalline wax and 1-3 parts of a silane coupling agent. The bio-based SiO2 / C composite material disclosed by the invention can be used for effectively replacing carbon black and white carbon black in a tire preparation process, and the prepared tire has low heat generation.

Description

Technical Field

[0001] The invention relates to the technical field of rubber tires, and in particular to the application of a SiO2 / C composite material in a low-heat-generation tire tread. Background Art

[0002] In recent years, the combined use of carbon black and white carbon black can reduce the rolling resistance of green tires. Due to the different surface polarities of carbon black and white carbon black, it is very difficult to disperse the two types of carbon black. In order to solve the dispersion problem of combined fillers, Cabot developed E2C carbon black and white carbon black dual-phase carbon black in the early years, which has a very good effect. The prepared dual-phase carbon black has low heat generation when applied to tires, but the preparation cost is high and the stability is poor. It has not been commercially promoted so far; Yiweiyi also developed a wet mixing method to prepare carbon black and white carbon black masterbatch to solve the dispersion problem of carbon black and white carbon black. The prepared tire has low heat generation. This method uses a solvent method, which has a high production cost, and the solvent is difficult to remove. The prepared rubber composition has a low modulus and poor wear resistance. Then the dual-phase filler of bio-based carbon black and white carbon black has not yet been developed. Summary of the invention

[0003] The purpose of the present invention is to provide an application of SiO2 / C composite material in low heat generation tire tread to solve the problem of difficult dispersion of carbon black and white carbon black.

[0004] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0005] The present invention provides an application of a SiO2 / C composite material in a low heat build-up tire tread, wherein the low heat build-up tire tread comprises the following raw materials in parts by mass:

[0006] 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 vulcanizer, 2-5 parts of antioxidant, 0.5-1.5 parts of microcrystalline wax, and 1-3 parts of silane coupling agent.

[0007] Preferably, in the application of the above-mentioned SiO2 / C composite material in a low heat generation tire tread, the preparation method of the SiO2 / C composite material comprises the following steps:

[0008] (1) mixing the edible fungus cultivation body with porous silica to obtain a silica composite edible fungus cultivation body;

[0009] The silicon dioxide composite edible fungus cultivation body is mixed with edible fungi to culture the edible fungi; after the culture is completed, the edible fungi are removed and the discarded cultivation body is retained;

[0010] (2) Carbonizing the discarded culture medium in step (1) to obtain a SiO2 / C composite material.

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

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

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

[0014] The white carbon black is one or both of GR175 and GR1165.

[0015] Preferably, in the application of the above-mentioned SiO2 / C composite material in the 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 the low heat generation 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 the tread of a low-heat-generation tire, the activator is stearic acid, zinc oxide, zinc stearate or lignin zinc salt.

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

[0020] The rubber, filler, SiO2 / C composite material, activator, antioxidant and microcrystalline wax are mixed and first kneaded to obtain a masterbatch;

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

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

[0023] The present invention provides an application of a SiO2 / C composite material in a low heat generation tire tread. The bio-based 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. The mechanism of action of the present invention is: the carbonization of edible fungi is organically combined with SiO2 to form a SiO2 / C composite aggregate with high dispersibility, which plays a role in reducing the Payne of the filler, thereby reducing heat generation; secondly, the present invention uses a porous silica material, so that the combination degree of SiO2 and C is high, which enhances the reinforcing effect of the filler. At the same time, the porous material is well combined with rubber, thereby enhancing the interaction between rubber and filler, further enhancing the reinforcing effect of the filler, reducing the slip of the molecular chain of the low heat generation tire tread, thereby reducing the heat generation of the low heat generation tire tread. The bio-based carbon black and white carbon black dual-phase filler of the present invention has low preparation cost and the whole process is environmentally friendly. The structure of carbon black can be adjusted according to needs to prepare different bio-based carbon black and white carbon black dual-phase fillers.

[0024] The tread contacts the ground, and the tread rubber needs to have good wear resistance and anti-skid performance. The C in the SiO2 / C composite material used in the present invention must have the characteristics of large specific surface area, high structural degree and small particle size to meet the requirements of the tread. DETAILED DESCRIPTION

[0025] The present invention provides an application of a SiO2 / C composite material in a low heat build-up tire tread, wherein the low heat build-up tire tread comprises the following raw materials in parts by mass:

[0026] 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 vulcanizer, 2-5 parts of antioxidant, 0.5-1.5 parts of microcrystalline wax, and 1-3 parts of silane coupling agent.

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

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

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

[0030] In the present invention, the mass fraction of the vulcanizing agent in the low heat build-up 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 the present invention, the weight percentage of the antioxidant in the low heat build-up tire tread is preferably 2 to 5 parts, more preferably 2.5 to 4.5 parts, and even more preferably 3 to 4 parts.

[0032] In the present invention, the mass fraction of the microcrystalline wax in the low heat build-up 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 the present invention, the mass fraction of the silane coupling agent in the low heat build-up 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 the present invention, the preparation method of the SiO2 / C composite material comprises the following steps:

[0035] (1) mixing the edible fungus cultivation body with porous silica to obtain a silica composite edible fungus cultivation body;

[0036] The silicon dioxide composite edible fungus cultivation body is mixed with edible fungi to culture the edible fungi; after the culture is completed, the edible fungi are removed and the discarded cultivation body is retained;

[0037] (2) Carbonizing the discarded culture medium in step (1) to obtain a SiO2 / C composite material.

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

[0039] In the present 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 may be used.

[0040] In the present invention, the porous silica in step (1) preferably includes one or more of silica powder, carbon monoxide, diatomaceous earth, diatom shale, opal, zeolite and montmorillonite, and further preferably includes silica powder, diatomaceous earth, diatom shale, opal, zeolite or montmorillonite, and more preferably silica powder.

[0041] In the present invention, the grade of the carbon steel is preferably TSI-A5008.

[0042] In the present 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 more preferably 500 nm to 10 μm; the specific surface area is preferably 60 to 500 m 2 / g, more preferably 60 to 300 m2 / g, more preferably 60 to 200 m 2 / g; the pore size is preferably 2 to 100 nm; the porosity is preferably 0.1 to 5 cm 3 / g, more preferably 0.1 to 3 cm 3 / g, more preferably 0.1 to 2 cm 3 / g.

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

[0044] In the present invention, the step (1) preferably further comprises: sterilizing the silica composite edible fungus cultivation body before mixing the silica composite edible fungus cultivation body with the edible fungus.

[0045] In the present invention, the conditions for the sterilization treatment are not limited, and a method familiar to those skilled in the art can be used. Specifically, in the embodiment of the present invention, the sterilization treatment is carried out at 120° C. for 1.5 h or more.

[0046] In the present invention, the edible fungi in step (1) preferably include but are not limited to shiitake mushrooms, oyster mushrooms or black fungus. Preferably, the embodiment of the present invention takes black fungus as an example for cultivation.

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

[0048] In the present invention, step (2) preferably further comprises: naturally drying the waste culture medium of step (1) before the carbonization. The natural drying time is preferably 5 to 24 hours, more preferably 12 to 24 hours, and more preferably 24 hours.

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

[0050] In the present 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 more preferably nitrogen.

[0051] In the present invention, in step (2), the carbonization temperature is preferably 600-950°C, more preferably 700-900°C, and more preferably 800°C; the time is preferably 10-60 min, more preferably 30-60 min, and 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 more preferably 5°C / min.

[0052] In the present invention, the carbonization in step (2) preferably further comprises: crushing and screening in sequence.

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

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

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

[0056] In the present invention, the particle size D of the screening in step (2) is 50 It is preferably 500 nm to 45 μm, more preferably 500 nm to 20 μm, and still more preferably 500 nm to 10 μm.

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

[0058] In the present invention, the filler is preferably one or both of carbon black and white carbon black, more preferably white carbon black.

[0059] In the present 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 the present invention, the white carbon black is preferably one or both of GR175 and GR1165, more preferably GR175; the white carbon black is purchased from Quecheng Silicon Chemical Co., Ltd.

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

[0062] In the present 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 more preferably antioxidant 4020.

[0063] In the present 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, more preferably bis-[3-(triethoxysilyl)propyl]-tetrasulfide;

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

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

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

[0067] In the present invention, the method for preparing the low heat build-up tire tread comprises the following steps:

[0068] The rubber, filler, SiO2 / C composite material, activator, antioxidant and microcrystalline wax are mixed and first kneaded to obtain a masterbatch;

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

[0070] In the present invention, the first mixing process is:

[0071] Put rubber, filler, SiO2 / C composite material, activator, antioxidant and microcrystalline wax into an internal mixer, set the speed of the internal mixer to 45-55rpm, mix for 30-50s, then lift the bolt and press the bolt to mix for 20-30s, lift the bolt and press the bolt to mix until the temperature reaches 150-165℃ for rubber discharge;

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

[0073] Mixing for 30 to 50 seconds, more preferably 35 to 45 seconds, and more preferably 38 to 40 seconds;

[0074] The mixing time is 20 to 30 seconds, preferably 22 to 27 seconds, and more preferably 24 to 26 seconds.

[0075] The mixing is performed to a temperature of 150 to 165°C for debinding, more preferably 152 to 162°C, and even more preferably 155 to 160°C.

[0076] In the present invention, the second mixing process is:

[0077] Put the masterbatch and vulcanizing agent into the internal mixer, set the speed of the internal mixer to 25-35rpm, mix for 30-50s, then lift the bolt and press the bolt to mix for 20-30s, lift the bolt and press the bolt to mix until the temperature reaches 105-115℃ for rubber discharge;

[0078] The speed of the internal mixer is 25 to 35 rpm, more preferably 26 to 33 rpm, and more preferably 28 to 30 rpm;

[0079] Mixing for 30 to 50 seconds, more preferably 32 to 48 seconds, and more preferably 35 to 45 seconds;

[0080] The mixing time is 20 to 30 seconds, preferably 22 to 27 seconds, and more preferably 24 to 26 seconds.

[0081] The mixing is carried out to a temperature of 105 to 115°C for debinding, more preferably 107 to 113°C, and even more preferably 110 to 112°C.

[0082] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0083] In the following embodiments, the preparation method of SiO2 / C composite material comprises the following steps:

[0084] 2 kg of Auricularia auricula culture (from the Science and Technology Demonstration Park of Dongjingcheng Forestry Bureau, Heilongjiang) and 200 g of silica powder (D 50 -8μm, model TSI-1, manufacturer is Harbin Silicon New Materials Co., Ltd., particle size is 500nm~10μm, specific surface area is 60~200m 2 / g, pore size is 2~100nm, porosity is 0.1~2cm 3 / g) and evenly mixed to obtain a silicon dioxide composite edible fungus culture body;

[0085] After sterilizing the silica composite edible fungus culture body at 120° C. for 1.5 h, inoculating the auricularia auricula into the silica composite edible fungus culture body for cultivation, and after the auricularia auricula has been cultivated for 3 months, removing the mature auricularia auricula and retaining the discarded culture body;

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

[0087] Example 1

[0088] A low heat build-up tire tread comprising the following raw materials in parts by weight:

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

[0090] A method for preparing a low heat build-up tire tread comprises the following steps:

[0091] Put natural rubber, SiO2 / C composite material, silane coupling agent, activator stearic acid, zinc oxide, antioxidant 4020, RD and microcrystalline wax into an internal mixer, set the speed of the internal mixer to 50 rpm, mix for 30 seconds, then continue to mix at 50 rpm with the bolt lifted and pressed for 20 seconds, discharge at 152°C to obtain a masterbatch;

[0092] Put the masterbatch, vulcanizing agent sulfur and accelerator into an internal mixer, set the speed of the internal mixer to 30 rpm, mix for 30 seconds, and then continue to mix for 20 seconds at 30 rpm with the bolt lifted and pressed. The second batch of rubber is discharged at 105°C to obtain a low heat generation tire tread.

[0093] Example 2

[0094] A low heat build-up tire tread comprising the following raw materials in parts by weight:

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

[0096] A method for preparing a low heat build-up tire tread comprises the following steps:

[0097] Put natural rubber, white carbon black GR175, SiO2 / C composite material, activator stearic acid, zinc oxide, antioxidant 4020, RD and microcrystalline wax into an internal mixer, set the speed of the internal mixer to 50 rpm, mix for 30 seconds, then continue to mix at 50 rpm with the bolt lifted and pressed for 20 seconds, discharge at 152 ° C to obtain a masterbatch;

[0098] Put the masterbatch, vulcanizing agent sulfur and accelerator into an internal mixer, set the speed of the internal mixer to 30 rpm, mix for 30 seconds, and then continue to mix for 20 seconds at 30 rpm with the bolt lifted and pressed. The second batch of rubber is discharged at 105°C to obtain a low heat generation tire tread.

[0099] Example 3

[0100] A low heat build-up tire tread comprising the following raw materials in parts by weight:

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

[0102] A method for preparing a low heat build-up tire tread comprises the following steps:

[0103] Put natural rubber, white carbon black GR175, SiO2 / C composite material, activator stearic acid, zinc oxide, antioxidant 4020, RD and microcrystalline wax into an internal mixer, set the speed of the internal mixer to 50 rpm, mix for 30 seconds, then continue to mix at 50 rpm with the bolt lifted and pressed for 20 seconds, discharge at 152 ° C to obtain a masterbatch;

[0104] Put the masterbatch, vulcanizing agent sulfur and accelerator into an internal mixer, set the speed of the internal mixer to 30 rpm, mix for 30 seconds, and then continue to mix for 20 seconds at 30 rpm with the bolt lifted and pressed. The second batch of rubber is discharged at 105°C to obtain a low heat generation tire tread.

[0105] Comparative Example 1

[0106] A low heat build-up tire tread comprising the following raw materials in parts by weight:

[0107] 100 parts of natural rubber, 3435 parts of carbon black N23, 15 parts of white carbon black GR175, 2 parts of activator stearic acid and 4 parts of zinc oxide, 1 part of vulcanizing agent sulfur and 1.9 parts of accelerator NS, 1.5 parts of antioxidant 4020 and 1.0 parts of RD, 1 part of microcrystalline wax, 1.5 parts of silane coupling agent bis-[3-(triethoxysilyl)propyl]-tetrasulfide;

[0108] A method for preparing a low heat build-up tire tread comprises the following steps:

[0109] Put natural rubber, carbon black N234, white carbon black GR175, silane coupling agent bis-[3-(triethoxysilyl)propyl]-tetrasulfide, activator stearic acid, zinc oxide antioxidant 4020, RD and microcrystalline wax into an internal mixer, set the speed of the internal mixer to 50 rpm, mix for 30 seconds, then continue to mix at 50 rpm with the bolt lifted and pressed for 20 seconds, and discharge the rubber at 152° C. to obtain a masterbatch;

[0110] Put the masterbatch, vulcanizing agent sulfur and accelerator into an internal mixer, set the speed of the internal mixer to 30 rpm, mix for 30 seconds, and then continue to mix for 20 seconds at 30 rpm with the bolt lifted and pressed. The second batch of rubber is discharged at 105°C to obtain a low heat generation tire tread.

[0111] Comparative Example 2

[0112] A low heat build-up tire tread comprising the following raw materials in parts by weight:

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

[0114] A method for preparing a low heat build-up tire tread comprises the following steps:

[0115] Put natural rubber, carbon black N234, white carbon black GR175, silane coupling agent bis-[3-(triethoxysilyl)propyl]-tetrasulfide, activator stearic acid, zinc oxide, antioxidant 4020, RD and microcrystalline wax into an internal mixer, set the speed of the internal mixer to 50 rpm, mix for 30 seconds, then continue to mix at 50 rpm with the bolt lifted and pressed for 20 seconds, and discharge the rubber at 152° C. to obtain a masterbatch;

[0116] Put the masterbatch, vulcanizing agent sulfur and accelerator into an internal mixer, set the speed of the internal mixer to 30 rpm, mix for 30 seconds, and then continue to mix for 20 seconds at 30 rpm with the bolt lifted and pressed. The second batch of rubber is discharged at 105°C to obtain a low heat generation tire tread.

[0117] The performance test of the low heat build-up tire treads prepared in Examples 1 to 3 and Comparative Examples 1 to 2 was conducted in accordance with GB / T528-1998. The results are shown in Table 1.

[0118] Table 1 Performance test results of low heat generation tire tread in Examples 1 to 3 and Comparative Examples 1 to 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: The DMA test conditions for tanδ / 60℃ are 151℃×30min (test conditions frequency 20Hz, strain 10±2%, temperature scan 0℃-80℃).

[0121] As shown in Table 1, it can be seen from the above comparative examples 1 and 2 and examples 1, 2 and 3 that the reinforcing effect of the SiO2 / C composite material is similar to that of carbon black N234. It can be seen from comparative example 1 and example 1 that the heat generation of the SiO2 / C composite material is reduced by 37%. It can be seen from the above examples that the low heat generation tire tread prepared with the SiO2 / C composite material has low heat generation performance.

[0122] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. Application of SiO2 / C composite material in low heat generation tire tread, characterized in that: The low heat build-up tire tread comprises the following raw materials in parts by weight: 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 vulcanizer, 2-5 parts of antioxidant, 0.5-1.5 parts of microcrystalline wax, and 1-3 parts of silane coupling agent.

2. The use of the SiO2 / C composite material according to claim 1 in a low heat generation tire tread, characterized in that: The preparation method of the SiO2 / C composite material comprises the following steps: (1) mixing the edible fungus cultivation body with porous silica to obtain a silica composite edible fungus cultivation body; The silicon dioxide composite edible fungus cultivation body is mixed with edible fungi to culture the edible fungi; after the culture is completed, the edible fungi are removed and the discarded cultivation body is retained; (2) Carbonizing the discarded culture medium in step (1) to obtain a SiO2 / C composite material.

3. The use of the SiO2 / C composite material according to claim 1 in a low heat build-up tire tread, characterized in that: The rubber is one or more of natural rubber, styrene-butadiene rubber and butadiene rubber.

4. The use of the SiO2 / C composite material in a low heat build-up tire tread according to claim 2, characterized in that: The filler is one or both of carbon black and white carbon black; The carbon black is one or two of N134, N220, N234, N375, N347 and N339; The white carbon black is one or both of GR175 and GR1165.

5. The use of the SiO2 / C composite material in a low heat build-up tire tread according to claim 1, characterized in that: The vulcanizing agent is one or more of sulfur, Si-69, accelerator NS and accelerator CZ; The antioxidant is one or more of antioxidant 4020, antioxidant RD, and antioxidant DTPD.

6. The use of the SiO2 / C composite material in a low heat build-up tire tread according to claim 3, characterized in that: The silane coupling agent is one or more of bis-[3-(triethoxysilyl)propyl]-tetrasulfide, bis(triethoxysilylpropyl)disulfide and mercaptosilane.

7. Use of the SiO2 / C composite material according to claim 3 or 4 in a low heat build-up tire tread, characterized in that: The activator is stearic acid, zinc oxide, zinc stearate or lignin zinc salt.

8. The use of the SiO2 / C composite material in a low heat build-up tire tread according to claim 5, characterized in that: The method for preparing the low heat build-up tire tread comprises the following steps: The rubber, filler, SiO2 / C composite material, activator, antioxidant and microcrystalline wax are mixed and first kneaded to obtain a masterbatch; The masterbatch and the vulcanizing agent are mixed and then subjected to a second mixing process to obtain a low heat build-up tire tread.