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CN-121975189-A - Modified molybdenum tailings for improving rubber heat conduction performance and friction performance, and preparation method and application thereof

CN121975189ACN 121975189 ACN121975189 ACN 121975189ACN-121975189-A

Abstract

The application relates to the technical field of rubber production, in particular to modified molybdenum tailings for improving rubber heat conduction performance and friction performance, and a preparation method and application thereof. The preparation method comprises the steps of adding pretreated molybdenum tailings into a solvent with the weight being 3-5 times of that of the molybdenum tailings, sequentially adding stearic acid, zinc borate and boron nitride, continuously stirring and heating for reaction, filtering out solids after natural cooling, washing and drying to constant weight to obtain first-time modified molybdenum tailings, slowly dropwise adding a silane coupling agent into deionized water with the weight being 10-15 times that of the first-time modified molybdenum tailings while stirring, regulating the pH value to 4-5 by glacial acetic acid to obtain hydrolysate, adding the first-time modified molybdenum tailings, continuously stirring and heating for reaction, filtering out solids after natural cooling, washing and drying to obtain second-time modified molybdenum tailings. The modified molybdenum tailings prepared by the method can fully utilize the characteristics of the molybdenum tailings, so that the heat conduction performance of the rubber material is improved, and the friction coefficient is reduced.

Inventors

  • SUN PEIZHU
  • JIANG RUIHUAN
  • ZHANG BIN

Assignees

  • 利通希法(青岛)新材料科技有限公司

Dates

Publication Date
20260505
Application Date
20260123

Claims (10)

  1. 1. The preparation method of the modified molybdenum tailings is characterized by specifically comprising the following steps of: (1) Adding stearic acid, zinc borate and boron nitride into the pretreated molybdenum tailings according to the weight ratio of stearic acid to zinc borate to boron nitride=100 (3-5) to (2-4) to (1-2) in sequence, continuously stirring and heating to 85-90 ℃ for 3-4 hours, filtering out solid after natural cooling, washing and drying to constant weight to obtain the molybdenum tailings after the first modification; (2) And (3) performing secondary modification treatment, namely slowly dropwise adding a silane coupling agent into deionized water with the weight which is 10-15 times that of the molybdenum tailings after the primary modification while stirring at the speed of 150-200r/min, regulating the pH value to 4-5 by using glacial acetic acid to prepare hydrolysis liquid, adding the molybdenum tailings after the primary modification, continuously stirring and heating to 60-70 ℃, reacting for 2-3 hours, naturally cooling, filtering out solids, washing and drying to prepare the secondary modified molybdenum tailings.
  2. 2. The method according to claim 1, wherein the silane coupling agent is added in an amount of 5 to 10% by weight of the molybdenum tailings after the first modification in the second modification treatment.
  3. 3. The preparation method according to claim 1, wherein the silane coupling agent is selected from any one or more of silane coupling agent KH-550, silane coupling agent KH-560, silane coupling agent Si-69, silane coupling agent KH-580, and silane coupling agent KH-910.
  4. 4. The method of claim 1, wherein the solvent is xylene.
  5. 5. The method according to claim 1, wherein the solvent for washing in the first modification treatment is acetone.
  6. 6. The method according to claim 1, wherein in the second modification treatment, the solvent for washing is deionized water.
  7. 7. A modified molybdenum tailings produced by the production process of any one of claims 1 to 6.
  8. 8. Use of the modified molybdenum tailings of claim 9 to improve the thermal conductivity and friction properties of rubber.
  9. 9. A rubber comprising the modified molybdenum tailings of claim 7.
  10. 10. The rubber according to claim 9, wherein the rubber is an industrial sealing type product, a transmission type product, a vibration/noise reduction type product or a pipe fitting type product.

Description

Modified molybdenum tailings for improving rubber heat conduction performance and friction performance, and preparation method and application thereof Technical Field The application relates to the technical field of rubber production, in particular to modified molybdenum tailings for improving rubber heat conduction performance and friction performance, and a preparation method and application thereof. Background Rubber is widely applied in the industrial field by virtue of excellent elasticity, but an inherent short plate with heat conducting property and friction property becomes a key bottleneck for restricting efficient operation of equipment. On one hand, the low thermal conductivity causes unsmooth heat dissipation in the scenes of electronic equipment, automobile engines and the like, directly causes shortened service life of elements and increased risk of equipment faults, and on the other hand, the unbalanced friction performance not only increases potential safety hazards of tire braking and mechanical transmission energy consumption, but also accelerates performance deterioration and early failure of products such as sealing elements, conveying belts and the like under high-temperature working conditions. With the rapid development of industry, the demand for high performance composite materials is increasing. The traditional rubber filler (such as white carbon black and carbon black) has poor thermal conductivity, so that the rubber product is easy to age under the dynamic working condition, and meanwhile, the high surface energy of the rubber filler leads to higher friction coefficient with a contact interface. In the related art, special fillers on which rubber enhanced heat conduction and antifriction functions depend, such as special fillers of aluminum oxide (8000-12000 yuan/ton), boron nitride (over 5 ten thousand yuan/ton) and the like, antifriction functions depend on molybdenum disulfide (20000-30000 yuan/ton) and natural graphite (5000-8000 yuan/ton), the problems of high raw material cost and strong resource dependence exist, and part of fillers (such as graphite) are easy to cause rubber coloring and limit the application of light-colored products. The molybdenum tailings are byproducts in the molybdenum ore dressing process, and the main components of the molybdenum tailings contain rich heat-conducting minerals and lamellar minerals, wherein the chemical components (mass percent) are ：SiO2 60-80%,Al2O3 10-16%,K2O 3-6%,Na2O 1-2%,MgO 2-4%,Mo 0.5-1%, and the balance is other components. Molybdenum tailings are generally regarded as waste and cannot be effectively utilized, so that not only is a large amount of land occupied, but also environmental and safety hazards can be caused. However, the high heat conductivity minerals and lamellar minerals present in molybdenum tailings have potential application value. With the development of high-end fields such as new energy automobile battery packs, aerospace sealing parts, 5G base stations and the like, composite performance requirements with high heat conduction and stable friction are provided for rubber materials, and the complex requirements are difficult to meet in the prior art. Therefore, it is needed to break through the existing bottleneck through innovative means and promote the comprehensive performance of rubber to realize the span-type improvement. Disclosure of Invention The application provides modified molybdenum tailings for improving rubber heat conduction performance and friction performance, and a preparation method and application thereof. The modified molybdenum tailings prepared by the method can fully utilize the characteristics of the molybdenum tailings, so that the heat conduction performance of the rubber material is improved, and the friction coefficient is reduced. In a first aspect, the application provides a preparation method of modified molybdenum tailings, which adopts the following technical scheme: the preparation method of the modified molybdenum tailings specifically comprises the following steps: (1) Adding stearic acid, zinc borate and boron nitride into the pretreated molybdenum tailings according to the weight ratio of stearic acid to zinc borate to boron nitride=100 (3-5) to (2-4) to (1-2) in sequence, continuously stirring and heating to 85-90 ℃ for 3-4 hours, filtering out solid after natural cooling, washing and drying to constant weight to obtain the molybdenum tailings after the first modification; (2) And (3) performing secondary modification treatment, namely slowly dropwise adding a silane coupling agent into deionized water with the weight which is 10-15 times that of the molybdenum tailings after the primary modification while stirring at the speed of 150-200r/min, regulating the pH value to 4-5 by using glacial acetic acid to prepare hydrolysis liquid, adding the molybdenum tailings after the primary modification, continuously stirring and heating to 60-70 ℃, reacting for 2-3 hours, n