Application of SiO2 / C composite material in preparation of upper triangular rubber

Abstract

The application belongs to the technical field of tire manufacturing, and particularly discloses application of SiO2 / C composite material in preparation of upper triangular rubber. Specifically, the upper triangular rubber comprises 100 parts of natural rubber, 0-40 parts of fillers, 10-60 parts of SiO2 / C composite material, 5-10 parts of activator, 0.5-4 parts of tackifying resin, 3-6 parts of vulcanizing agent and 2-5 parts of antioxidant. The SiO2 / C composite material can effectively replace white carbon black or carbon black in the preparation process of the upper triangular rubber of the tire, and the tire prepared based on the SiO2 / C composite material has low heat generation and excellent fatigue resistance.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of tire manufacturing, in particular to application of SiO2 / C composite material in preparation of upper triangular rubber. BACKGROUND

[0002] The function of the triangular rubber is to fill the space between the inner side of the tire body and the positive wrapping part of the toe port. However, the end part of the tire body and the steel wire wrapping cloth of the full steel radial tire is located in a position with large internal movement of the tire, and accidents are prone to occur at these positions. The triangular rubber can prevent such accidents. The triangular rubber of most tires is divided into upper triangular rubber and lower triangular rubber. The upper triangular rubber has the function of absorbing energy, and the lower triangular rubber has the function of fixing the toe port and the tire body, and together improves the rigidity of the whole toe port. The no tube filling rubber generally adopts a single rubber, and the tube filling rubber is generally divided into upper triangular rubber and lower triangular rubber. The upper triangular rubber of the tube has to bear the flexural deformation of the bead, and the specific requirements of the upper triangular rubber are as follows: fatigue resistance, smaller hardness than the lower filling rubber, good adhesion of the semi-finished product, fast vulcanization speed, good dynamic performance and the like.

[0003] In order to meet the above functions, in addition to using rubber with excellent adhesion to the steel wire, the upper triangular rubber is required to have moderate hardness, and has the characteristics of rigid-flexible transition, that is, has certain hardness and good flexibility. Therefore, four problems are solved in the formula design: 1, flexibility, 2, heat generation, 3, high temperature fatigue, and 4, aging, and long flat line. Solving these problems can effectively solve the toe port empty problem.

[0004] The temperature of the upper triangular rubber during tire driving is usually 70-100 DEG C. At this temperature, the modulus of the rubber will decrease. In order to improve the modulus and fatigue performance at high temperature, a high-sulfur low-promotion system is usually used in the formula design. The upper triangular rubber prepared by using the system has no problem in fatigue, but the aging retention rate is low, the multi-sulfur bond is broken to form a single sulfur, the fatigue in the middle and late stages is poor, and fatigue fracture is prone to occur.

[0005] With the improvement of road conditions, the tire is generally used for more than two years, which requires better high temperature fatigue resistance. Therefore, it is a big problem in the industry to develop upper triangular rubber with aging resistance and fatigue resistance. SUMMARY

[0006] Therefore, the application provides application of SiO2 / C composite material in preparation of upper triangular rubber, so as to solve the problem that the existing upper triangular rubber cannot simultaneously solve the aging resistance and fatigue resistance.

[0007] In order to achieve the above purpose, the application adopts the following technical scheme:

[0008] The application of a SiO2 / C composite material in preparing upper triangular rubber, the upper triangular rubber comprising the following components in mass fraction: natural rubber 100 parts; filler 0-40 parts; SiO2 / C composite material 10-60 parts; activating agent 5-10 parts; tackifying resin 0.5-4 parts; vulcanizing agent 3-6 parts; antioxidant 2-5 parts.

[0009] Preferably, the preparation method of the SiO2 / C composite material is as follows:

[0010] 1) mixing edible fungus cultivation body and porous silicon dioxide to obtain silicon dioxide composite edible fungus cultivation body;

[0011] mixing the silicon dioxide composite edible fungus cultivation body with edible fungus to culture the edible fungus; after the culture is completed, removing the edible fungus and retaining the waste cultivation body;

[0012] 2) carbonizing the waste cultivation body in step 1 to obtain SiO2 / C composite material.

[0013] Preferably, the mass ratio of the porous silicon dioxide to the edible fungus cultivation body in step 1) is 1:1-10; the time for the edible fungus culture is ≥3 months.

[0014] Preferably, the temperature for the carbonization in step 2) is 600-950℃, the time is 10-60 min, and the rate of the temperature rise to the carbonization temperature is 5-15℃ / min.

[0015] Preferably, the filler comprises carbon black and / or white carbon black.

[0016] Preferably, the activating agent comprises one or more of stearic acid, zinc oxide, zinc stearate and lignin zinc salt.

[0017] Preferably, the tackifying resin comprises one or more of tackifying resin 203, tackifying resin 204 or petroleum tackifying resin C5.

[0018] Preferably, the vulcanizing agent comprises insoluble sulfur and / or sulfur-containing accelerator.

[0019] Preferably, the antioxidant comprises antioxidant 4020 and / or polytrimethyldihydroquinoline.

[0020] Preferably, the preparation method of the upper triangular rubber is as follows:

[0021] mixing natural rubber, filler, SiO2 / C composite material, activating agent, tackifying resin and antioxidant to obtain masterbatch; then mixing the masterbatch and vulcanizing agent to obtain upper triangular rubber.

[0022] According to the above technical solution, compared with the prior art, the application has the following beneficial effects:

[0023] The application creatively applies the bio-based SiO2 / C composite material to the preparation of the upper triangular rubber of the tire, which can effectively replace the white carbon black or carbon black in the upper triangular rubber, and the upper triangular rubber prepared by the method has low heat generation characteristics and fatigue resistance.

[0024] The SiO2 / C composite material has high dispersibility and can reduce the Payne effect of the filler, thereby reducing heat generation.

[0025] The application creatively applies the bio-based SiO2 / C composite material to the preparation of the upper triangular rubber of the tire, which can effectively replace the white carbon black or carbon black in the upper triangular rubber, and the upper triangular rubber prepared by the method has low heat generation characteristics and fatigue resistance.

[0026] The SiO2 / C composite material has high dispersibility and can reduce the Payne effect of the filler, thereby reducing heat generation.

[0027] The SiO2 / C composite material has high dispersibility and can reduce the Payne effect of the filler, thereby reducing heat generation. DETAILED DESCRIPTION

[0028] The application provides application of SiO2 / C composite material in preparation of upper triangular rubber, and the upper triangular rubber comprises the following components in parts by mass: 100 parts of natural rubber, 0-40 parts of filler, 10-60 parts of SiO2 / C composite material, 5-10 parts of activator, 0.5-4 parts of tackifying resin, 3-6 parts of vulcanizing agent and 2-5 parts of antioxidant; preferably, the upper triangular rubber comprises the following components in parts by mass: 100 parts of natural rubber, 1-30 parts of filler, 20-50 parts of SiO2 / C composite material, 6-9 parts of activator, 1-3 parts of tackifying resin, 4-5 parts of vulcanizing agent and 3-4 parts of antioxidant; further preferably, the upper triangular rubber comprises the following components in parts by mass: 100 parts of natural rubber, 10-20 parts of filler, 30-40 parts of SiO2 / C composite material, 8 parts of activator, 2 parts of tackifying resin, 4.5 parts of vulcanizing agent and 3.5 parts of antioxidant.

[0029] In the application, the preparation method of the SiO2 / C composite material is as follows:

[0030] 1) mixing edible fungus cultivation body and porous silicon dioxide to obtain silicon dioxide composite edible fungus cultivation body;

[0031] mixing the silicon dioxide composite edible fungus cultivation body with edible fungus to culture the edible fungus; after the culture is completed, the edible fungus is removed, and the waste cultivation body is reserved;

[0032] 2) carbonizing the waste cultivation body in step 1 to obtain SiO2 / C composite material.

[0033] In the application, the mass ratio of the porous silicon dioxide to the edible fungus cultivation body in step 1) is 1:1-10, preferably 1:2-4, and more preferably 1:2; the time for the edible fungus culture is ≥3 months, further preferably ≥3.5 months, and more preferably 4 months.

[0034] In the application, the edible fungus cultivation body in step 1) preferably comprises a biomass carbon source. The biomass carbon source includes but is not limited to one or more of cottonseed hulls, corn cobs, leaf wood chips, bean straw powder, wheat straw powder, peanut shells, bran and rice bran.

[0035] In the application, the source of the edible fungus cultivation body in step 1) is not limited, and commercially available or non-commercial products known to those skilled in the art can be used.

[0036] In the application, the porous silicon dioxide in step 1) preferably comprises one or more of silicon powder, carbon shanggui, diatomite, diatom shale, opal, zeolite and montmorillonite, further preferably comprises silicon powder, diatomite, diatom shale, opal, zeolite or montmorillonite, and more preferably is silicon powder.

[0037] In the application, the grade of the carbon shanggui is preferably TSI-A5008.

[0038] In the present application, the particle size of the porous silica in step 1) is preferably 500 nm to 100 μm, further 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, further preferably 60 to 300 m 2 / g, and 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, further preferably 0.1 to 3 cm 3 / g, and more preferably 0.1 to 2 cm 3 / g.

[0039] In the present application, the carbonization in step 2) is preferably carried out under a protective atmosphere; the protective atmosphere is preferably at least one of nitrogen or argon.

[0040] In the present application, the temperature of the carbonization in step 2) is preferably 600 to 950°C, further preferably 700 to 900°C, and more preferably 800°C; the time is preferably 10 to 60 min, further preferably 30 to 60 min, and more preferably 60 min; the rate of temperature increase to the desired carbonization temperature is preferably 5 to 15°C / min, further preferably 5 to 10°C / min, and more preferably 5°C / min.

[0041] In the present application, the carbonization in step 2) preferably further comprises, in sequence, crushing and sieving.

[0042] In the present application, the particle size D50 of the sieving is preferably 500 nm to 45 μm, further preferably 500 nm to 20 μm, and more preferably 500 nm to 10 μm.

[0043] In the present application, the waste edible mushroom cultivation body is used as a carbon source and is fermented. At the same time, the micro-sized silicon dioxide particles containing a large number of nanopores are introduced into the edible mushroom cultivation body during the preparation of the edible mushroom cultivation body. The porous structure can provide a large number of attachment sites for the uniform attachment of the fungi, and provides a good temperature and humidity growth environment for the fungi, which is conducive to the rapid growth of the fungi. Since the fungi exchange organic matter with the surrounding edible mushroom cultivation body during growth, the starch, polysaccharide, protein and ester components in the edible mushroom cultivation body are effectively utilized, so that the fungi and the porous structure of the silicon dioxide form a three-dimensional mycelium structure at the micro, meso and macro levels, which provides a large number of attachment sites for the dispersion of biomass carbon on SiO2, helps to form a molecular-level biomass carbon structure distribution, and realizes the organic combination of biomass carbon and porous SiO2. After the mature edible mushrooms are picked, the waste silicon dioxide composite edible mushroom cultivation body is carbonized to promote the dehydration and condensation of the biomass carbon structure in the cultivation body, remove the internal hydrogen and oxygen elements, and form nanoscale cavities in the original position, thereby forming a SiO2 / C composite material with good structural properties. Therefore, the biomass carbon source in the silicon dioxide composite edible mushroom cultivation body forms a natural micro-porous structure after multiple actions with the microbial flora, and can become the best source for constructing ideal SiO2 / C composite materials after being combined with SiO2 and being fermented again.

[0044] In the preparation method of the present application, the SiO2 is derived from minerals, and the carbon is derived from biomass, which is more green and environmentally friendly than the method in which the carbon source is derived from petroleum and chemical organic synthesis. The waste edible mushroom cultivation body is effectively utilized, the problems of large energy consumption and environmental unfriendliness in the preparation process of the prior art are solved, and the green preparation of SiO2 / C composite materials is realized.

[0045] The present application can compensate for the lack of biomass silicon in the edible mushroom cultivation body by adding different proportions of microporous silicon dioxide to the edible mushroom cultivation body, and can control the ratio of carbon to silicon dioxide in the SiO2 / C composite material.

[0046] The present application carbonizes the three-dimensional mycelium structure of the biomass carbon source attached to the porous sites of SiO2, and the SiO2 / C composite material obtained has uniform distribution of SiO2 phase and biomass carbon phase, has the characteristics of not easy to agglomerate and good dispersibility, and is suitable for use as a functional filler for rubber. At the same time, the SiO2 / C composite material prepared has good low-heat generation performance when used as a rubber filler.

[0047] In the present application, the filler includes carbon black and / or white carbon black.

[0048] In the present application, the carbon black includes one or more of N375, N330, N326, N660 and pyrolytic carbon black.

[0049] In the present application, the activator includes one or more of stearic acid, zinc oxide, zinc stearate and lignin zinc salt.

[0050] In the present application, the tackifying resin includes one or more of tackifying resin 203, tackifying resin 204 or petroleum tackifying resin C5.

[0051] In the present application, the vulcanizing agent includes insoluble sulfur and / or sulfur-containing accelerator.

[0052] In the present application, the antioxidant includes antioxidant 4020 and / or polytrimethyl dihydroquinoline (antioxidant RD).

[0053] In the present application, the preparation method of the upper triangular rubber is as follows:

[0054] The natural rubber, the filler, the SiO2 / C composite material, the activator, the tackifying resin and the antioxidant are first mixed to obtain a masterbatch; then the masterbatch and the vulcanizing agent are secondly mixed to obtain the upper triangular rubber.

[0055] In the present application, the first mixing is specifically as follows: the mixing speed is set to 45-55 rpm, each component is added, mixing for 30-50 seconds, and the bolt is pressed and mixed for 20-30 seconds, and the bolt is pressed and mixed to 145-165℃ to discharge the rubber, and the masterbatch is prepared; the mixing speed can be specifically 46 rpm, 48 rpm, 50 rpm, 52 rpm, 54 rpm; the mixing time can be specifically 32 seconds, 35 seconds, 38 seconds, 40 seconds, 42 seconds, 45 seconds, 48 seconds; the bolt pressing and mixing time can be specifically 22 seconds, 24 seconds, 25 seconds, 26 seconds, 28 seconds; and the bolt pressing and mixing temperature can be specifically 146℃, 148℃, 150℃, 152℃, 155℃, 158℃, 160℃, 162℃, 164℃.

[0056] In the present application, the second mixing is specifically as follows: the speed is set to 25-35 rpm, each component is added, mixing for 30-50 seconds, and the bolt is pressed and mixed for 20-30 seconds, and the bolt is pressed and mixed to 95-110℃ to discharge the rubber, and the fatigue-resistant rubber composition is prepared; the mixing speed can be specifically 26 rpm, 28 rpm, 30 rpm, 32 rpm, 34 rpm; the mixing time can be specifically 32 seconds, 35 seconds, 38 seconds, 40 seconds, 42 seconds, 45 seconds, 48 seconds; the bolt pressing and mixing time can be specifically 22 seconds, 24 seconds, 25 seconds, 26 seconds, 28 seconds; and the bolt pressing and mixing temperature can be specifically 96℃, 98℃, 100℃, 102℃, 105℃, 108℃.

[0057] The technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0058] Embodiment 1

[0059] 2 kg of agaric cultivation bodies (from Heilongjiang Dongjingcheng Forestry Bureau Science and Technology Demonstration Garden) and 500 g of silicon powder (D50-8 μm, model TSI-1, manufacturer Harbin Silicon New Material Co., Ltd., particle size 500 nm-10 μm, specific surface area 60-200 m 2 / g, pore size 2-100 nm, porosity 0.1-2 cm 3 / g) were uniformly mixed to obtain a silicon dioxide composite edible fungus cultivation body;

[0060] After the silicon dioxide composite edible fungus cultivation body was sterilized at 120℃ for 1.5 h, agaric fungus was inoculated into the silicon dioxide composite edible fungus cultivation body for cultivation. After the agaric fungus was cultivated for 4 months, the mature agaric fungus was removed, and the waste cultivation body was retained;

[0061] The waste cultivation body was naturally dried for 24 h, and then the waste cultivation body was placed in a carbonization furnace and carbonized at a temperature increasing rate of 5℃ / min to 700℃ for 30 min under nitrogen protection. The obtained silicon-carbon composite was ball milled in a planetary ball mill at a speed of 500 rpm for 30 min, and then the ball milled sample was sieved by a centrifugal classifier to obtain a sample with a particle size D50≤5 μm to obtain a SiO2 / C composite material.

[0062] Start the internal mixer and set the speed to 50 rpm. Add 100 parts of natural rubber, 45 parts of SiO2 / C composite material, 6 parts of activator (2 parts of stearic acid and 4 parts of zinc oxide), 2032 parts of tackifying resin, and 202.5 parts of antioxidant 402. Mix for 35 seconds, press the bolt for 20 seconds, and press the bolt to 152℃ for glue discharge. The masterbatch is prepared.

[0063] Start the internal mixer and set the speed to 30 rpm. Add the masterbatch, insoluble sulfur, and sulfur-containing accelerator TBBS (the mass ratio of natural rubber, insoluble sulfur, and sulfur-containing accelerator (TBBS) in the masterbatch is 100:3.14:1). Mix for 30 seconds, press the bolt for 20 seconds, and press the bolt to 105℃ for glue discharge. The upper triangular rubber is prepared.

[0064] Embodiment 2

[0065] The preparation of the SiO2 / C composite material is the same as that in Embodiment 1.

[0066] Start the internal mixer, set the speed to 50 rpm, add 100 parts of natural rubber, 15 parts of white carbon black GR175, 30 parts of SiO2 / C composite material, 9.5 parts of activator (3.5 parts of stearic acid, 6 parts of zinc oxide), 52 parts of petroleum tackifying resin C5, and 2.5 parts of antioxidant RD; mix for 35 seconds, then mix for 20 seconds with the screw lifted and the ram pressed, and then mix to 152°C with the screw lifted and the ram pressed to discharge the rubber, to obtain a masterbatch;

[0067] Start the internal mixer, set the speed to 30 rpm, add the masterbatch, insoluble sulfur, and sulfur-containing accelerator TBBS (the mass ratio of natural rubber, insoluble sulfur, and sulfur-containing accelerator (TBBS) in the masterbatch is 100:3.14:1), mix for 30 seconds, then mix for 20 seconds with the screw lifted and the ram pressed, and then mix to 105°C with the screw lifted and the ram pressed to discharge the rubber, to obtain the upper triangular rubber.

[0068] Example 3

[0069] The SiO2 / C composite material is prepared as in Example 1.

[0070] Start the internal mixer, set the speed to 55 rpm, add 100 parts of natural rubber, 10 parts of carbon black N326, 35 parts of SiO2 / C composite material, 8 parts of activator (2 parts of stearic acid, 6 parts of zinc oxide), 53 parts of petroleum tackifying resin C5, and 2 parts of antioxidant 4020; mix for 30 seconds, then mix for 25 seconds with the screw lifted and the ram pressed, and then mix to 152°C with the screw lifted and the ram pressed to discharge the rubber, to obtain a masterbatch.

[0071] Start the internal mixer, set the speed to 25 rpm, add the masterbatch, insoluble sulfur, and sulfur-containing accelerator TBBS (the mass ratio of natural rubber, insoluble sulfur, and sulfur-containing accelerator (TBBS) in the masterbatch is 100:3:2), mix for 35 seconds, then mix for 25 seconds with the screw lifted and the ram pressed, and then mix to 100°C with the screw lifted and the ram pressed to discharge the rubber, to obtain the upper triangular rubber.

[0072] Example 4

[0073] The SiO2 / C composite material is prepared as in Example 1.

[0074] Start the internal mixer, set the speed to 55 rpm, add 100 parts of natural rubber, 40 parts of carbon black N326, 10 parts of SiO2 / C composite material, 5 parts of activator (3 parts of stearic acid, 2 parts of zinc oxide), 30.5 parts of tackifying resin 20, and 4 parts of antioxidant 4020; mix for 40 seconds, then mix for 20 seconds with the screw lifted and the ram pressed, and then mix to 150°C with the screw lifted and the ram pressed to discharge the rubber, to obtain a masterbatch.

[0075] Start the internal mixer, set the speed to 35 rpm, add the masterbatch, insoluble sulfur and sulfur-containing accelerator TBBS (the mass ratio of natural rubber, insoluble sulfur and sulfur-containing accelerator (TBBS) in the masterbatch is 100:2:1), mix for 40 seconds, pull the bolt and press the bolt for 30 seconds, pull the bolt and press the bolt to 95°C until the glue is discharged, and prepare the upper triangular glue.

[0076] Example 5

[0077] Mix 2 kg of agaric cultivation body (from Heilongjiang Dongjingcheng Forestry Bureau Science and Technology Demonstration Garden) with 1 kg of silicon powder (D50-8 μm, model TSI-1, manufacturer Harbin Silicon New Material Co., Ltd., particle size 500 nm-10 μm, specific surface area 60-200 m 2 / g, pore size 2-100 nm, porosity 0.1-2 cm 3 / g) to obtain a silicon dioxide composite edible fungus cultivation body;

[0078] After sterilizing the silicon dioxide composite edible fungus cultivation body at 120°C for 1.5 h, inoculate the silicon dioxide composite edible fungus cultivation body with agaric fungus for cultivation, and after the agaric fungus is cultivated for 3 months, remove the mature agaric fungus and retain the waste cultivation body;

[0079] After natural drying of the waste cultivation body for 24 h, the waste cultivation body is placed in a carbonization furnace and heated to 950°C at a heating rate of 10°C / min under nitrogen protection for 60 min; the obtained silicon-carbon composite is ball milled in a planetary ball mill at a speed of 500 rpm for 30 min, and then the ball milled sample is sieved by a centrifugal classifier to obtain a sample with a particle size D50≤3 μm to obtain a SiO2 / C composite material.

[0080] Start the internal mixer, set the speed to 45 rpm, add 100 parts of natural rubber, 60 parts of SiO2 / C composite material, 9 parts of activator (5 parts of stearic acid, 4 parts of zinc oxide), 2034 parts of tackifying resin, and 205 parts of antioxidant 402; mix for 50 seconds, pull the bolt and press the bolt for 20 seconds, pull the bolt and press the bolt to 145°C until the glue is discharged, and prepare the masterbatch;

[0081] Start the internal mixer, set the speed to 30 rpm, add the masterbatch, insoluble sulfur and sulfur-containing accelerator TBBS (the mass ratio of natural rubber, insoluble sulfur and sulfur-containing accelerator (TBBS) in the masterbatch is 100:3.5:1), mix for 30 seconds, pull the bolt and press the bolt for 25 seconds, pull the bolt and press the bolt to 105°C until the glue is discharged, and prepare the upper triangular glue.

[0082] Comparative Example 1

[0083] The difference between this comparative example and Example 1 is that the same mass fraction of carbon black N326 is used instead of the SiO2 / C composite material.

[0084] Comparative Example 2

[0085] The only difference between this comparative example and Example 2 is that carbon black N326 is used instead of SiO2 / C composite in equal mass fraction.

[0086] Experimental Example 1

[0087] The relevant properties of Examples 1-2 and Comparative Examples 1-2 were detected, and the detection results are shown in Table 1.

[0088] M300, TB, E.B% detection method: tensile properties according to GB / T528-1998.

[0089] Tan δ / 60℃ was tested by DMA, and the DMA test conditions were: 151℃ x 30min (test condition frequency 20Hz, strain 10±2%, temperature scan 0-80℃)

[0090] High temperature fatigue (aging) test conditions: 100℃, elongation 1.8%, test speed 150CPM.

[0091] Table 1: Test results of the relevant properties of the upper triangular rubber

[0092]

[0093] As can be seen from the above Comparative Examples 1 and 2 and Examples 1-5, the reinforcing effect of the SiO2 / C composite prepared in the experiments is similar to that of white carbon black and N326, and the heat generation is reduced by 35.5% (= (0.135-0.087) / 0.135) and the fatigue resistance is improved by more than 50%. As can be seen from the above examples, the rubber composition prepared by using SiO2 / C composite has low heat generation and good fatigue resistance.

[0094] Each of the embodiments in the specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other.

[0095] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The application of a SiO2 / C composite material in the preparation of upper triangular adhesive, characterized in that, The upper triangular rubber comprises the following components in parts by weight: 100 parts natural rubber; 0-40 parts filler; 10-60 parts SiO2 / C composite material; 5-10 parts activator; 0.5-4 parts tackifying resin; 3-6 parts vulcanizing agent; and 2-5 parts antioxidant. The preparation method of the SiO2 / C composite material is as follows: 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 a SiO2 / C composite material.

2. The application of the SiO2 / C composite material according to claim 1 in the preparation of upper triangular adhesive, characterized in that, The mass ratio of porous silica to edible fungus culture medium in step 1) is 1:1 to 10; the edible fungus cultivation time is ≥3 months.

3. The application of the SiO2 / C composite material according to claim 2 in the preparation of upper triangular adhesive, characterized in that, The carbonization temperature in step 2) is 600–950°C, the time is 10–60 min, and the rate of heating to the carbonization temperature is 5–15°C / min.

4. The application of the SiO2 / C composite material according to any one of claims 1 to 3 in the preparation of upper triangular adhesive, characterized in that, The filler includes carbon black and / or silica.

5. The application of the SiO2 / C composite material according to claim 4 in the preparation of upper triangular adhesive, characterized in that, The activator includes one or more of stearic acid, zinc oxide, zinc stearate, and zinc lignin salt.

6. The application of the SiO2 / C composite material according to claim 5 in the preparation of upper triangular adhesive, characterized in that, The tackifying resin includes one or more of tackifying resin 203, tackifying resin 204, or petroleum tackifying resin C5.

7. The application of the SiO2 / C composite material according to claim 5 or 6 in the preparation of upper triangular adhesive, characterized in that, The vulcanizing agent includes insoluble sulfur and / or sulfur-containing accelerators.

8. The application of the SiO2 / C composite material according to claim 7 in the preparation of upper triangular adhesive, characterized in that, The antioxidants include antioxidant 4020 and / or polytrimethyldihydroquinoline.

9. The application of the SiO2 / C composite material according to claim 8 in the preparation of upper triangular adhesive, characterized in that, The preparation method of the upper triangular adhesive is as follows: Natural rubber, fillers, SiO2 / C composite materials, activators, tackifying resins, and antioxidants are first mixed to obtain masterbatch; then the masterbatch and vulcanizing agents are second mixed to obtain upper triangular rubber.

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