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CN-122011303-A - Impact-resistant and wear-resistant lining plate for mine and preparation method thereof

CN122011303ACN 122011303 ACN122011303 ACN 122011303ACN-122011303-A

Abstract

The invention discloses an impact-resistant wear-resistant lining plate for mine mining and a preparation method thereof, which belong to the technical field of polymer processing, double-bond modified silica hollow microspheres are obtained after double-bonding modification of burr-shaped modified silica hollow microspheres, and then the double-bond modified silica hollow microspheres are copolymerized with vinyl POSS and vinyl chloride, so that the problems of poor compatibility and easiness in layering of traditional inorganic particles and organic resins are solved, the double-bond modified silica hollow microspheres and the vinyl POSS can be embedded into a polyvinyl chloride matrix through chemical bonds, the interface binding force is obviously improved, performance attenuation caused by falling in use is avoided, the burr-shaped bulges have good mechanical strength and wear resistance and higher heat-resistant temperature, and can penetrate into the polyvinyl chloride resin matrix to form a mechanical locking structure of an anchor, and impact energy can be effectively transmitted and dispersed through an interface instead of being concentrated to cause interface stripping failure.

Inventors

  • WU ZHIYONG
  • Li Maodao
  • LI TAIHONG
  • Tan Xinchang

Assignees

  • 湖南海思特材料科技股份有限公司

Dates

Publication Date
20260512
Application Date
20260326

Claims (10)

  1. 1. The preparation method of the impact-resistant wear-resistant lining plate for mining is characterized by comprising the following steps of: firstly, formaldehyde and phenol are used as carbon sources, ammonium dihydrogen phosphate is used as a pore-forming agent, a phenolic resin precursor is formed through polycondensation reaction, and a porous structure is formed after calcination, so that porous carbon microspheres are obtained; step two, porous carbon microspheres are used as a carrier, cetyl trimethyl ammonium bromide is used as a template agent, ammonia water is used as an alkali catalytic environment, tetraethoxysilane forms a silica framework through hydrolysis-condensation reaction, and the template agent is removed through isopropanol and ammonium nitrate treatment, so that the silica composite microspheres are obtained; Performing secondary coating modification on the surface of the silicon dioxide composite microsphere by taking tetraethoxysilane as a silicon source, regulating microenvironment by urea, and promoting uniform deposition of a silicon layer to obtain a modified silicon dioxide hollow microsphere containing burrs; And fourthly, taking di (2-ethylhexyl) peroxydicarbonate and dilauroyl peroxide as composite initiators to trigger a vinyl chloride monomer to perform free radical polymerization reaction, and enabling double bond modified silicon dioxide and vinyl POSS to participate in polymerization through surface double bonds to form an inorganic phase and organic phase interconnected composite structure, and obtaining the impact-resistant wear-resistant lining plate for mining after high-temperature high-pressure hot press molding. And fourthly, taking di (2-ethylhexyl) peroxydicarbonate and dilauroyl peroxide as composite initiators to trigger a vinyl chloride monomer to perform free radical polymerization reaction, and enabling double bond modified silicon dioxide and vinyl POSS to participate in polymerization through surface double bonds to form an inorganic phase and organic phase interconnected composite structure, and obtaining the impact-resistant wear-resistant lining plate for mining after high-temperature high-pressure hot press molding.
  2. 2. The method for preparing the impact-resistant and wear-resistant lining plate for mining according to claim 1, wherein the specific preparation steps of the silica composite microspheres are as follows: Adding cetyl trimethyl ammonium bromide, porous carbon microsphere and ammonia water into a reaction kettle, stirring for 30-40min at 20-25 ℃ and 500-600r/min, then adding tetraethoxysilane, continuing to react for 6-7h, centrifuging for 5-8min at 8000-9000r/min, transferring the filter cake into isopropanol and ammonium nitrate, reacting for 24h at 80-90 ℃ and vacuum freeze-drying for 12-14h at-20 ℃ to obtain the silicon dioxide composite microsphere.
  3. 3. The method for preparing the impact-resistant and wear-resistant lining plate for mining according to claim 2, wherein the dosage ratio of the cetyl trimethyl ammonium bromide to the porous carbon microspheres to the ammonia water to the ethyl orthosilicate to the isopropanol to the ammonium nitrate is 30-40g to 50-60g to 2-3L to 170-180mL to 800-900mL to 14-16g.
  4. 4. The method for preparing the impact-resistant and wear-resistant lining plate for mining according to claim 1, wherein the specific preparation steps of the modified silica hollow microspheres are as follows: Adding hexadecyl trimethyl ammonium bromide, urea, silicon dioxide composite microspheres and deionized water into a reaction kettle, stirring for 30-40min at 20-25 ℃ and 500-600r/min, then adding isopropyl alcohol and tetraethyl orthosilicate, continuously stirring for 30-40min, heating to 70-80 ℃, continuously reacting for 16-18h, filtering, washing a filter cake with deionized water for 2-4 times, vacuum drying for 1-2h at 60-80 ℃, transferring to a muffle furnace, heating to 550-600 ℃ and calcining for 6-8h to obtain the modified silicon dioxide hollow microspheres.
  5. 5. The method for preparing the impact-resistant and wear-resistant lining plate for mining according to claim 4, wherein the dosage ratio of the cetyltrimethylammonium bromide, the urea, the silicon dioxide composite microspheres, the deionized water, the isopropyl alcohol and the tetraethyl orthosilicate is 20-22 g/12-14 g/8-10 g/450-500 mL/4-5 mL.
  6. 6. The method for preparing the impact-resistant and wear-resistant lining plate for mining according to claim 1, wherein the concrete preparation steps of the double bond modified silica hollow microspheres are as follows: Adding the modified silica hollow microspheres, absolute ethyl alcohol and deionized water into a reaction kettle, stirring for 10-12min at 50-60 ℃ and 500-600r/min, then adding gamma-methacryloxypropyl trimethoxy silane, continuously stirring for reaction for 6-8h, filtering, washing the precipitate with deionized water and absolute ethyl alcohol for 2-4 times, and vacuum drying for 1-2h at 60-80 ℃ to obtain double bond modified silica hollow microspheres.
  7. 7. The method for preparing the impact-resistant and wear-resistant lining plate for mining according to claim 6, wherein the dosage ratio of the modified silica hollow microspheres to the absolute ethyl alcohol to the deionized water to the gamma-methacryloxypropyl trimethoxysilane is 15-20g:500-600mL:100-120mL:12-14mL.
  8. 8. The method for preparing the impact-resistant and wear-resistant lining plate for mining according to claim 1, wherein the specific preparation steps of the impact-resistant and wear-resistant lining plate for mining are as follows: Adding double bond modified silicon dioxide hollow microspheres and vinyl POSS into a reaction kettle, stirring for 3-4 hours at 50-60 ℃ and 400-500r/min, adding 1, 4-dioxane, bis (2-ethylhexyl) peroxydicarbonate and dilauroyl peroxide into the reaction kettle, sealing, introducing nitrogen for protection, adding chloroethylene into the reaction kettle, stirring for 4-5 hours at 50-60 ℃ and 500-600r/min, adding a methanol solution with the mass concentration of 20-22% after the reaction is finished, standing for 24-29 hours after the dropwise addition is finished, filtering, washing a filter cake with anhydrous methanol for 2-4 times, vacuum drying at 60-80 ℃ for 1-2 hours to obtain modified polyvinyl chloride pasty resin, transferring the modified polyvinyl chloride pasty resin onto a hot press, and hot-pressing for 20-30 minutes at 5-10MPa and 350-390 ℃ to obtain the impact-resistant wear-resistant lining plate for mining.
  9. 9. The method for preparing the impact-resistant and wear-resistant lining plate for mining according to claim 8, wherein the double bond modified silica hollow microsphere, vinyl POSS, 1, 4-dioxane, bis (2-ethylhexyl) peroxydicarbonate, dilauroyl peroxide, chloroethylene and methanol solution are used in the proportion of 10-12g:8-10g:120-140mL:1-2g:1-2g:80-90g:500-600mL.
  10. 10. An impact resistant and wear resistant lining board for mining, characterized by being manufactured by the manufacturing method according to any one of claims 1-9.

Description

Impact-resistant and wear-resistant lining plate for mine and preparation method thereof Technical Field The invention belongs to the technical field of polymer processing, and particularly relates to an impact-resistant and wear-resistant lining plate for mine mining and a preparation method thereof. Background The ultra-high molecular weight polyethylene has excellent wear resistance, impact resistance, chemical corrosion resistance and low temperature toughness, and is widely applied as a thermoplastic engineering plastic. However, ultra-high molecular weight polyethylene also has some disadvantages inherent in polyethylene resins, such as low heat distortion temperature, poor creep resistance, large thermal expansion coefficient, and low surface hardness, which limits the range of applications to some extent. The measure for improving the heat resistance of the ultra-high molecular weight polyethylene product mainly comprises the steps of adopting a stretching process to orient ultra-high molecular weight polyethylene macromolecules, forming a net structure by means of silane crosslinking, peroxide crosslinking and the like to increase the heat deformation resistance of the composite material, and adding inorganic modifiers such as glass fibers, carbon fibers, boron fibers and the like. The Chinese patent with publication number CN102558645A discloses an impact-resistant wear-resistant lining board and a preparation method thereof, wherein the scheme adopts ultra-high molecular weight polyethylene, medium density polyethylene, low density polyethylene, ultra-fine aluminum hydroxide, diatomite, vinyl triethoxysilane, benzoic acid, dicumyl peroxide and formula materials are uniformly stirred in a high-speed stirring step by step, and then the lining board is formed by hot pressing on a hot press. The prepared impact-resistant wear-resistant lining board keeps the characteristics of excellent wear resistance, impact resistance, chemical corrosion resistance and low-temperature toughness of the ultra-high molecular weight polyethylene, and has the characteristics of good processability and low material cost, but the problem of easy agglomeration is caused by the poor compatibility of inorganic particles and organic resin only through the blending of inorganic filler and the ultra-high molecular weight polyethylene. Disclosure of Invention The invention aims to provide an impact-resistant wear-resistant lining plate for mine mining and a preparation method thereof, wherein double-bond modified silica hollow microspheres are obtained after double-bonding modification of burr-shaped modified silica hollow microspheres, and then the double-bond modified silica hollow microspheres are copolymerized with vinyl POSS and vinyl chloride, so that the problems of poor compatibility and easiness in layering of traditional inorganic particles and organic resins are solved, the double-bond modified silica hollow microspheres and the vinyl POSS can be promoted to be embedded into a polyvinyl chloride matrix through chemical bonds, the interface binding force is obviously improved, and performance attenuation caused by falling in use is avoided, so that the hollow double-bond modified silica hollow microspheres have good mechanical strength and wear resistance, and have higher heat-resistant temperature. The aim of the invention can be achieved by the following technical scheme: a preparation method of an impact-resistant wear-resistant lining plate for mining comprises the following steps: and firstly, formaldehyde and phenol are used as carbon sources, ammonium dihydrogen phosphate is used as a pore-forming agent, a phenolic resin precursor is formed through polycondensation reaction, and a porous structure is formed after calcination, so that the porous carbon microsphere is obtained. Step two, porous carbon microspheres are used as a carrier, cetyl trimethyl ammonium bromide is used as a template agent, ammonia water is used as an alkali catalytic environment, tetraethoxysilane forms a silica framework through hydrolysis-condensation reaction, and the template agent is removed through isopropanol and ammonium nitrate treatment, so that the silica composite microspheres are obtained. And thirdly, performing secondary coating modification on the surface of the silicon dioxide composite microsphere by taking tetraethoxysilane as a silicon source, regulating microenvironment by urea, promoting uniform deposition of a silicon layer, obtaining a burr-shaped modified silicon dioxide hollow microsphere, and treating the modified silicon dioxide hollow microsphere by utilizing hydrolysis-condensation reaction of gamma-methacryloxypropyl trimethoxysilane to obtain the double bond modified silicon dioxide hollow microsphere. And fourthly, taking di (2-ethylhexyl) peroxydicarbonate and dilauroyl peroxide as composite initiators to trigger a vinyl chloride monomer to perform free radical polymerization reaction, and enabling double