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CN-122011534-A - High-wear-resistance nano filler modified rubber material and preparation method thereof

CN122011534ACN 122011534 ACN122011534 ACN 122011534ACN-122011534-A

Abstract

The invention discloses a high-wear-resistance nano filler modified rubber material and a preparation method thereof, and belongs to the technical field of rubber material modification. The hollow SiO 2 nanometer particle with porous shell layer and stable structure is prepared by taking water-soluble polyacrylic acid micelle as a template and controlling the hydrolysis rate of tetraethyl orthosilicate by regulating and controlling the dosage of ammonia water, and then PEG-PLA segmented copolymer and silane coupling agent KH550 are synergistically modified to improve the dispersibility and compatibility of the particle. And (3) blending and banburying the modified porous hollow SiO 2 particles and styrene-butadiene rubber slurry, and vulcanizing and forming to obtain the modified rubber material. The invention improves the wear resistance and tensile strength of the rubber, maintains good elasticity and elongation at break, realizes the combination of high strength, high wear resistance and high toughness, and has mild and controllable process.

Inventors

  • YANG JUNJIE
  • LV JIANGUO
  • YANG JIANPING

Assignees

  • 浙江大学

Dates

Publication Date
20260512
Application Date
20260410

Claims (10)

  1. 1. The preparation method of the high-wear-resistance nano filler modified rubber material is characterized by comprising the following steps of: s1, dissolving 0.3-0.5 part of polyacrylic acid in 5-6 parts of ammonia water with the mass fraction of 25%, and dropwise adding the solution into 100-120 parts of absolute ethyl alcohol to obtain a water-soluble gum bundle solution; S2, dissolving 2-2.4 parts of tetraethyl orthosilicate in 10-12 parts of absolute ethyl alcohol, slowly dripping the solution into the micelle solution for reaction, centrifuging, washing to remove a polyacrylic acid template, and obtaining porous hollow SiO 2 particles; S3, preparing a solution A from porous hollow SiO 2 particles, absolute ethyl alcohol and a silane coupling agent KH550, dissolving the PEG-PLA segmented copolymer in an ethanol solution to prepare a mixed solution, and mixing and stirring to obtain a modified porous hollow SiO 2 dispersion; S4, banburying styrene-butadiene rubber, zinc oxide, stearic acid, a promoter CZ and sulfur to prepare rubber slurry; S5, adding the modified particle dispersion liquid into rubber slurry, banburying to remove the solvent, vulcanizing and forming, and cooling to obtain the high-wear-resistance nano filler modified rubber material.
  2. 2. The method of claim 1, wherein the polyacrylic acid has an average molecular weight of 3000.
  3. 3. The preparation method according to claim 1, wherein the reaction temperature in the step S2 is 30 ℃ and the reaction time is 6-8 hours.
  4. 4. The preparation method according to claim 1, wherein in the step S3, the amount of the silane coupling agent KH550 is 0.3-0.5 part by mass, and the amount of the PEG-PLA block copolymer is 0.6-0.8 part by mass.
  5. 5. The preparation method according to claim 1, wherein the mixing and stirring time in the step S3 is 2-3 hours.
  6. 6. The preparation method according to claim 1, wherein the banburying temperature in the step S4 is 80-90 ℃, the rotating speed is 40-50 r/min, and the banburying time is 15-20 min.
  7. 7. The preparation method of the rubber composition according to claim 1, wherein in the step S4, 50 parts by mass of styrene-butadiene rubber, 1-1.2 parts by mass of zinc oxide, 0.5-1 part by mass of stearic acid, 0.4-0.6 part by mass of accelerator CZ and 0.8-1.2 parts by mass of sulfur are calculated.
  8. 8. The preparation method according to claim 1, wherein the mass part of the modified particle dispersion liquid added in the step S5 is 40-50 parts, the banburying temperature is 90-100 ℃, and the banburying time is 60-80 min.
  9. 9. The preparation method according to claim 1, wherein in the step S5, the vulcanizing temperature is 160-170 ℃, the vulcanizing pressure is 10-12 mpa, and the vulcanizing time is 25-30 min.
  10. 10. The high wear-resistant nano filler modified rubber material is characterized by being prepared by the preparation method of any one of claims 1-9.

Description

High-wear-resistance nano filler modified rubber material and preparation method thereof Technical Field The invention belongs to the technical field of rubber material modification, and particularly relates to a high-wear-resistance nano filler modified rubber material and a preparation method thereof. Background The rubber material has excellent elasticity, flexibility and fatigue resistance, and is widely applied to the industrial fields of automobiles, machinery, rail transit and the like, but the common rubber material has low surface hardness and poor wear resistance, and is easy to wear, age, crack and the like under the working conditions of long-term friction and reciprocating motion, so that the service life of a product is greatly shortened, and the application of the product under high-load and high-friction scenes is limited. At present, the rubber is modified in the industry by adding nano inorganic filler (such as nano SiO 2, carbon black and nano TiO 2), and the wear resistance and mechanical strength of the rubber are improved by means of the high strength and high hardness characteristics of inorganic nano particles. However, the conventional inorganic particle-directly filled rubber has some problems: Firstly, nano particles are easy to agglomerate and unevenly disperse in a rubber matrix, stress concentration points are easy to form, but mechanical properties of materials are reduced, secondly, the interface compatibility between inorganic particles and the rubber matrix is poor, the binding force is weak, the particles easily slip and fall off when stressed, the reinforcing and wear-resisting effects are poor, thirdly, the density of solid inorganic filler is high, the reinforcing effect can be achieved only by high addition amount, and the rubber elasticity and toughness are reduced, the brittleness is increased, and the processability is poor. Although the prior art is improved by means of surface modification, blending process optimization and the like, the inherent defects of solid inorganic particles cannot be fundamentally overcome, and abrasion resistance, strength and toughness are difficult to be considered. Therefore, development of a novel filler structure and a corresponding rubber modification method are needed, and good comprehensive mechanical properties and processability of rubber are ensured while abrasion resistance is improved. Disclosure of Invention The invention provides a high wear-resistant nano filler modified rubber material and a preparation method thereof, wherein a water-soluble rubber bundle is taken as a template, TEOS hydrolysis rate is controlled by regulating and controlling ammonia water consumption, porous hollow SiO 2 nano particles with porous shell layers and stable structures are prepared, and then PEG-PLA segmented copolymer and silane coupling agent are adopted for synergistic modification, The nano-filler modified rubber is blended with rubber slurry, slurry components can enter the cavity inside the porous hollow SiO 2 to form a mutually embedded composite structure, so that the inorganic filler duty ratio is reduced, particle aggregation is avoided, the wear resistance and mechanical toughness of the rubber material are cooperatively improved, and the problems of filler aggregation, unbalanced performance, poor wear resistance and the like of the nano-filler modified rubber in the prior art are solved. In order to achieve the above purpose, the present invention adopts the following technical scheme: a preparation method of a high wear-resistant nano filler modified rubber material comprises the following steps: S1, preparing a water-soluble adhesive beam template, namely dissolving 0.3-0.5 part of polyacrylic acid (PAA, mv=3000) into 5-6 parts of ammonia water with the mass fraction of 25%, and then dropwise adding the ammonia water into 100-120 parts of absolute ethyl alcohol to obtain a micelle solution; S2, 2-2.4 parts of tetraethyl orthosilicate is dissolved in 10-12 parts of absolute ethyl alcohol, then the mixture is slowly dripped into the micelle solution prepared in the step S1, the mixture reacts for 6-8 hours at the temperature of 30 ℃, after the reaction is finished, the mixture is centrifuged, and the PAA template is removed by washing, so that porous hollow SiO 2 particles are obtained; S3, adding 15-20 parts of absolute ethyl alcohol into the porous hollow SiO 2 particles in the step S2, adding 0.3-0.5 part of silane coupling agent KH550 to prepare a solution A, adding 0.6-0.8 part of PEG-PLA segmented copolymer into 15-20 parts of ethanol solution, stirring to prepare a uniform mixed solution, adding the mixed solution into the solution A, and stirring for 2-3 hours to obtain modified porous hollow SiO 2 particle dispersion. S4, preparing rubber slurry, namely adding 50 parts by weight of styrene-butadiene rubber, 1-1.2 parts by weight of zinc oxide, 0.5-1 part by weight of stearic acid, 0.4-0.6 part by weight of accelerator