High-density silicon spar plank road plate and preparation method thereof

Abstract

The invention is applicable to the technical field of plank road plates, and provides a high-density silicon spar plank road plate and a preparation method thereof.The high-density silicon spar plank road plate is prepared from silica micro powder, quartz powder, Portland cement, modified nano perlite, modified nano sepiolite, modified betaine, composite fibers, a water reducing agent and silicon carbide micro powder; according to the high-density silicon spar plank road plate provided by the invention, the silica micro powder and the quartz sand are adopted as main raw materials, and the cement, the composite fibers, the modified nano perlite, the modified nano sepiolite, the modified betaine and the silicon carbide micro powder are added, so that the plank road plate has extremely high strength and density, can bear a relatively large load, has excellent weather resistance, and can be used for manufacturing the plank road plate. The plank road plate can resist erosion of severe environments such as ultraviolet rays and freeze thawing, and the service life of the plank road plate is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of plank road plates, and in particular relates to a high-density silicon crystal stone plank road plate and a preparation method thereof. Background Art

[0002] Silicon crystal stone plank board, also known as wood grain plank board, is a kind of artificial fiber cement wood grain board. It is a kind of full body wood grain decorative board. Silicon crystal stone plank board has rich colors and strong three-dimensional texture. It has a very good anti-slip effect when laid on the ground. It has good wear resistance, fireproof and moisture-proof. After waterproof treatment, it is not afraid of sun and rain. Silicon crystal stone plank board is widely used in modern major types of parks, scenic spots, lake, river, sea plank roads, hydrophilic platforms, leisure sun terraces, etc. It is the preferred material to replace wooden structure trails and plank roads.

[0003] However, some existing silicon crystal stone plank road panels have poor toughness, are brittle, are easy to crack, and have insufficient compressive strength, thereby reducing the service life of the silicon crystal stone plank road panels. Summary of the invention

[0004] The present invention provides a high-density silicon crystal stone plank board, aiming to solve the above-mentioned problems.

[0005] The present invention is implemented as follows: a high-density silicon crystal stone plank road board comprises the following raw materials in parts by weight: 45-55 parts of silicon micropowder, 20-30 parts of quartz powder, 5-15 parts of silicate cement, 2-6 parts of modified nano perlite, 3-7 parts of modified nano sepiolite, 3-7 parts of modified betaine, 5-10 parts of composite fiber, 1-5 parts of water reducer, and 1-5 parts of silicon carbide micropowder. Preferably, the water reducer is a polycarboxylic acid water reducer.

[0006] Preferably, the following raw materials are included in parts by weight: 48-52 parts of silicon micropowder, 23-27 parts of quartz powder, 8-12 parts of silicate cement, 3-5 parts of modified nano perlite, 4-8 parts of modified nano sepiolite, 4-6 parts of modified betaine, 6-9 parts of composite fiber, 2-4 parts of water reducer, and 2-4 parts of silicon carbide micropowder.

[0007] Preferably, the following raw materials are included in parts by weight: 50 parts of silicon micropowder, 25 parts of quartz powder, 10 parts of silicate cement, 4 parts of modified nano perlite, 6 parts of modified nano sepiolite, 5 parts of modified betaine, 7.5 parts of composite fiber, 3 parts of water reducer, and 3 parts of silicon carbide micropowder.

[0008] Preferably, the preparation method of the modified nano perlite is as follows: 15-20 parts of perlite are taken by weight, the surface is cleaned, then crushed and ground, put into 50-60 parts of hypochlorous acid solution with a concentration of 10-20%, pressurized to 1-2atm in a closed container, heated in a water bath at 30-35°C and stirred for 10-30min, depressurized after cooling, filtered and washed with deionized water 2-3 times, put into 60-80 parts of deionized water, then add 5-10 parts of hexadecyltrimethylammonium bromide, stir for 50-60min, filter and dry to obtain the modified nano perlite.

[0009] By adding hypochlorous acid, heating and light, the hypochlorous acid decomposes to produce oxygen and hydrochloric acid. Soaking in hydrochloric acid makes the perlite porous, impurities in the particle channels are dissolved, the pores are unblocked, and the adsorption capacity is improved. The generated oxygen forms small bubbles and enters the interlayers of the perlite, generating pressure, so that the wall layer of the perlite has a larger space, which improves the adsorption. Then, hexadecyltrimethylammonium bromide is added for treatment, and a cation exchange reaction occurs, which changes its surface energy and increases the interlayer spacing. At the same time, the dispersibility can be improved through electrostatic action, so that the modified nano perlite is dispersed at the nanometer level in the system, and the density and mechanical properties are improved.

[0010] Preferably, the preparation method of the modified nano-sepiolite is as follows: take 15-20 parts of sepiolite by weight, clean the surface, and crush and grind it after drying; then add 10-15 times the weight of a hydrochloric acid solution with a concentration of 15-25vt%, and soak it for 2-3 hours; after filtering, wash it with deionized water for 2-3 times, then add it to 5-10 times the weight of deionized water, add 10-15 parts of polyethylene glycol and 1-3 parts of sodium dodecyl sulfate, heat it to 60-80°C, stir and react for 1-2 hours, filter and wash it, add 5-10 times the weight of ethanol, then add 1-3 parts of methyltrimethoxysilane, heat it to 50-60°C in a closed environment, stir and react for 1-2 hours, filter, wash and dry it to obtain the modified nano-sepiolite.

[0011] By adding hydrochloric acid for surface corrosion modification, a stable porous structure is formed on the surface of the particles, and then further modified by polyethylene glycol and sodium dodecyl sulfate, the PEG molecular chain is adsorbed on the surface of the sepiolite to form a polymer protective film, which prevents the agglomeration of the sepiolite particles through the steric hindrance effect. Sodium dodecyl sulfate can reduce the surface tension and improve the dispersibility of the particles. The sepiolite particles are evenly dispersed without obvious agglomeration. In the composite material, the filling effect of sepiolite is better and the interface bonding is tighter. The hydroxyl groups on the PEG molecular chain hydrogen bond with the silicon hydroxyl groups on the surface of the sepiolite to form more active adsorption sites, adjust the pore structure of the sepiolite, increase its specific surface area and pore volume, thereby improving the adsorption capacity, and combine with other materials to form a stable three-dimensional system to improve stability and mechanical properties.

[0012] Preferably, the preparation method of the modified betaine is as follows: dissolving betaine in deionized water to prepare a 10-20% solution; adding the betaine solution into a reaction kettle, slowly adding epichlorohydrin dropwise, wherein the molar ratio of the betaine to epichlorohydrin is 1:1-2, stirring and reacting at 40-50°C for 2-3h, after the reaction is completed, adding an appropriate amount of sodium hydroxide solution to neutralize the acidic substances in the reaction system, precipitating the reaction mixture with ethanol, filtering and collecting the precipitate, washing with ethanol several times, and vacuum drying the washed precipitate at 60-80°C to obtain the modified betaine.

[0013] By adding epichlorohydrin to modify betaine, the hydrophobicity of betaine is improved, and its compatibility with the base material of the plank board is enhanced, so that betaine can be chemically bonded with other materials, the interface bonding force is improved, and thus the mechanical properties of the plank board are improved.

[0014] Preferably, the raw materials of the composite fiber include glass fiber, basalt fiber and nano-carbon fiber, and the mass ratio of the three is 1-2:1-3:1.

[0015] Preferably, the preparation method of the composite fiber is as follows: by weight, 15-20 parts of the raw material of the composite fiber, 1-2 parts of methyl methacrylate, and 1-3 parts of carboxymethyl cellulose are taken, mixed to obtain a mixture, the mixture is added to an extrusion device for extrusion, and ethylene bis fatty acid amide is added from the side feed port of the extrusion device, mixed with the mixture, and then extruded together, and then cooled and granulated to obtain the composite fiber. By adding methyl methacrylate and carboxymethyl cellulose, the strength, hydrophobicity, wear resistance, etc. of the fiber are improved, and combined with other materials to form a three-dimensional random support system, so that the density, waterproofness and mechanical properties of the plank board are improved.

[0016] The present invention also provides a method for preparing the high-density silicon crystal stone plank board, comprising the following steps:

[0017] Prepare the raw materials according to the ratio;

[0018] Add all raw materials into a vacuum mixer and mix them evenly, add an appropriate amount of water and stir under vacuum to form a uniform slurry without bubbles;

[0019] Pour the slurry into the mold and use a high-pressure molding machine for molding. Use high-frequency vibration equipment during the molding process to eliminate residual bubbles. The molding pressure is 30-40MPa;

[0020] The formed plank board is placed in a constant temperature and humidity environment for curing for 6-8 days, and then placed in a microwave sintering furnace to obtain the plank board. During the microwave sintering process, the modified nano perlite and modified nano sepiolite expand, which can fill the pores and improve the density and mechanical properties.

[0021] Preferably, microwave sintering is specifically:

[0022] Preheating stage: from room temperature to 300℃, heating rate 10℃ / min, time 30min, slowly heating to remove residual moisture and organic volatiles in the blank to avoid cracking caused by rapid heating;

[0023] Medium temperature sintering stage: from 300℃ to 600℃, the heating rate is 15℃ / min, and the time is 20min, which promotes the initial combination of particles inside the green body and forms a preliminary sintering network;

[0024] High temperature sintering stage: from 600℃ to 900℃, with a heating rate of 20℃ / min and a time of 15min, so that the particles inside the green body are fully melted and a dense microstructure is formed;

[0025] Insulation stage: Insulation at 900℃ for 10 minutes to ensure that the material is evenly heated and reaches a high density state;

[0026] Cooling stage: furnace cooling or inert gas protection cooling, cooling rate 5℃ / min, to avoid rapid cooling leading to internal stress concentration of the material and cracks.

[0027] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0028] The high-density silicon crystal stone plank road board provided by the present invention adopts silicon micropowder and quartz sand as main raw materials, and adds cement, composite fiber, modified nano perlite, modified nano sepiolite, modified betaine, and silicon carbide micropowder, so that the plank road board has extremely high strength and density, can withstand large loads, has excellent mechanical properties, can resist erosion by harsh environments such as ultraviolet rays and freeze-thaw, and extends the service life of the plank road board. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The present invention provides a flow chart of a method for preparing a high-density silicon crystal stone plank board. DETAILED DESCRIPTION

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0031] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0032] Example 1

[0033] The embodiment of the present invention provides a high-density silicon crystal stone plank board, such as Figure 1 As shown, the following raw materials are included in parts by weight: 45 parts of silicon micropowder, 20 parts of quartz powder, 5 parts of silicate cement, 2 parts of modified nano perlite, 3 parts of modified nano sepiolite, 3 parts of modified betaine, 5 parts of composite fiber, 1 part of water reducer, and 1 part of silicon carbide micropowder. Preferably, the water reducer is a polycarboxylic acid water reducer. The preparation method of the high-density silicon crystal stone plank board comprises the following steps:

[0034] Prepare the raw materials according to the ratio;

[0035] Add all raw materials into a vacuum mixer and mix them evenly, add an appropriate amount of water and stir under vacuum to form a uniform slurry without bubbles;

[0036] Pour the slurry into the mold and use a high-pressure molding machine to form it. Use high-frequency vibration equipment during the molding process to eliminate residual bubbles. The molding pressure is 30MPa;

[0037] The formed plank board is placed in a constant temperature and humidity environment for curing for 6 days, and then placed in a microwave sintering furnace to obtain the plank board. During the microwave sintering process, the modified nano perlite and modified nano sepiolite expand, which can fill the pores and improve the density and mechanical properties.

[0038] Among them, microwave sintering is specifically:

[0039] Preheating stage: from room temperature to 300℃, heating rate 10℃ / min, time 30min, slowly heating to remove residual moisture and organic volatiles in the blank to avoid cracking caused by rapid heating;

[0040] Medium temperature sintering stage: from 300℃ to 600℃, the heating rate is 15℃ / min, and the time is 20min, which promotes the initial combination of particles inside the green body and forms a preliminary sintering network;

[0041] High temperature sintering stage: from 600℃ to 900℃, with a heating rate of 20℃ / min and a time of 15min, so that the particles inside the green body are fully melted and a dense microstructure is formed;

[0042] Insulation stage: Insulation at 900℃ for 10 minutes to ensure that the material is evenly heated and reaches a high density state;

[0043] Cooling stage: furnace cooling or inert gas protection cooling, cooling rate 5℃ / min, to avoid rapid cooling leading to internal stress concentration of the material and cracks.

[0044] The preparation method of the modified nano perlite is as follows: 15 parts of perlite are taken by weight, the surface is cleaned, then crushed and ground, put into 50 parts of 10% hypochlorous acid solution, pressurized to 1atm in a closed container, heated in a water bath at 30°C and stirred for 10 minutes, depressurized after cooling, filtered and washed twice with deionized water, put into 60 parts of deionized water, then added with 5 parts of hexadecyltrimethylammonium bromide, stirred for reaction for 50 minutes, filtered and dried to obtain the modified nano perlite.

[0045] Furthermore, the preparation method of the modified nano-sepiolite is as follows: take 15 parts of sepiolite by weight, clean the surface, dry and then crush and grind; then add 10 times the weight and 15vt% hydrochloric acid solution, soak for 2h; filter and wash twice with deionized water, then add to 5 times the weight of deionized water, add 10 parts of polyethylene glycol and 1 part of sodium dodecyl sulfate, heat to 60°C, stir and react for 1h, filter and wash, add 5 times the weight of ethanol, then add 1 part of methyltrimethoxysilane, heat to 50°C in a closed environment, stir and react for 1h, filter, wash and dry to obtain modified nano-sepiolite.

[0046] Furthermore, the preparation method of the modified betaine is as follows: dissolving betaine in deionized water to prepare a 10% solution; adding the betaine solution into a reactor, slowly adding epichlorohydrin, the molar ratio of the betaine to epichlorohydrin is 1:1, stirring and reacting at 40°C for 2h, after the reaction is completed, adding an appropriate amount of sodium hydroxide solution to neutralize the acidic substances in the reaction system, precipitating the reaction mixture with ethanol, filtering and collecting the precipitate, washing with ethanol several times, and vacuum drying the washed precipitate at 60°C to obtain modified betaine.

[0047] In this embodiment, the raw materials of the composite fiber include glass fiber, basalt fiber and nano-carbon fiber, and the mass ratio of the three is 1:1:1. The preparation method of the composite fiber is as follows: take 15 parts of composite fiber raw materials, 1 part of methyl methacrylate, and 1 part of carboxymethyl cellulose by weight, mix them to obtain a mixture, add the mixture to an extrusion device for extrusion, and add ethylene bis fatty acid amide from the side feed port of the extrusion device, mix with the mixture and extrude them together, and then cool and granulate to obtain the composite fiber.

[0048] Example 2

[0049] The embodiment of the present invention provides a high-density silicon crystal stone plank board, such as Figure 1 As shown, the following raw materials are included in parts by weight: 48 parts of silicon micropowder, 23 parts of quartz powder, 8 parts of silicate cement, 3 parts of modified nano perlite, 4 parts of modified nano sepiolite, 4 parts of modified betaine, 6 parts of composite fiber, 2 parts of water reducer, and 2 parts of silicon carbide micropowder. Preferably, the water reducer is a polycarboxylic acid water reducer. The preparation method of the high-density silicon crystal stone plank board includes the following steps:

[0050] Prepare the raw materials according to the ratio;

[0051] Add all raw materials into a vacuum mixer and mix them evenly, add an appropriate amount of water and stir under vacuum to form a uniform slurry without bubbles;

[0052] Pour the slurry into the mold and use a high-pressure molding machine to form it. Use high-frequency vibration equipment during the molding process to eliminate residual bubbles. The molding pressure is 30MPa;

[0053] The formed plank board is placed in a constant temperature and humidity environment for curing for 6 days, and then placed in a microwave sintering furnace to obtain the plank board. During the microwave sintering process, the modified nano perlite and modified nano sepiolite expand, which can fill the pores and improve the density and mechanical properties.

[0054] Among them, microwave sintering is specifically:

[0055] Preheating stage: from room temperature to 300℃, heating rate 10℃ / min, time 30min, slowly heating to remove residual moisture and organic volatiles in the blank to avoid cracking caused by rapid heating;

[0056] Medium temperature sintering stage: from 300℃ to 600℃, the heating rate is 15℃ / min, and the time is 20min, which promotes the initial combination of particles inside the green body and forms a preliminary sintering network;

[0057] High temperature sintering stage: from 600℃ to 900℃, with a heating rate of 20℃ / min and a time of 15min, so that the particles inside the green body are fully melted and a dense microstructure is formed;

[0058] Insulation stage: Insulation at 900℃ for 10 minutes to ensure that the material is evenly heated and reaches a high density state;

[0059] Cooling stage: furnace cooling or inert gas protection cooling, cooling rate 5℃ / min, to avoid rapid cooling leading to internal stress concentration of the material and cracks.

[0060] The preparation method of the modified nano perlite is as follows: 15 parts of perlite are taken by weight, the surface is cleaned, then crushed and ground, put into 50 parts of 10% hypochlorous acid solution, pressurized to 1atm in a closed container, heated in a water bath at 30°C and stirred for 10 minutes, depressurized after cooling, filtered and washed twice with deionized water, put into 60 parts of deionized water, then added with 5 parts of hexadecyltrimethylammonium bromide, stirred for reaction for 50 minutes, filtered and dried to obtain the modified nano perlite.

[0061] Furthermore, the preparation method of the modified nano-sepiolite is as follows: take 15 parts of sepiolite by weight, clean the surface, dry and then crush and grind; then add 10 times the weight and 15vt% hydrochloric acid solution, soak for 2h; filter and wash twice with deionized water, then add to 5 times the weight of deionized water, add 10 parts of polyethylene glycol and 1 part of sodium dodecyl sulfate, heat to 60°C, stir and react for 1h, filter and wash, add 5 times the weight of ethanol, then add 1 part of methyltrimethoxysilane, heat to 50°C in a closed environment, stir and react for 1h, filter, wash and dry to obtain modified nano-sepiolite.

[0062] Furthermore, the preparation method of the modified betaine is as follows: dissolving betaine in deionized water to prepare a 10% solution; adding the betaine solution into a reactor, slowly adding epichlorohydrin, the molar ratio of the betaine to epichlorohydrin is 1:1, stirring and reacting at 40°C for 2h, after the reaction is completed, adding an appropriate amount of sodium hydroxide solution to neutralize the acidic substances in the reaction system, precipitating the reaction mixture with ethanol, filtering and collecting the precipitate, washing with ethanol several times, and vacuum drying the washed precipitate at 60°C to obtain modified betaine.

[0063] In this embodiment, the raw materials of the composite fiber include glass fiber, basalt fiber and nano-carbon fiber, and the mass ratio of the three is 1:1:1. The preparation method of the composite fiber is as follows: take 15 parts of composite fiber raw materials, 1 part of methyl methacrylate, and 1 part of carboxymethyl cellulose by weight, mix them to obtain a mixture, add the mixture to an extrusion device for extrusion, and add ethylene bis fatty acid amide from the side feed port of the extrusion device, mix with the mixture and extrude them together, and then cool and granulate to obtain the composite fiber.

[0064] Example 3

[0065] The embodiment of the present invention provides a high-density silicon crystal stone plank board, such as Figure 1As shown, the following raw materials are included in parts by weight: 50 parts of silicon micropowder, 25 parts of quartz powder, 10 parts of silicate cement, 4 parts of modified nano perlite, 6 parts of modified nano sepiolite, 5 parts of modified betaine, 7.5 parts of composite fiber, 3 parts of water reducer, and 3 parts of silicon carbide micropowder. Preferably, the water reducer is a polycarboxylic acid water reducer. The preparation method of the high-density silicon crystal stone plank board includes the following steps:

[0066] Prepare the raw materials according to the ratio;

[0067] Add all raw materials into a vacuum mixer and mix them evenly, add an appropriate amount of water and stir under vacuum to form a uniform slurry without bubbles;

[0068] Pour the slurry into the mold and use a high-pressure molding machine to form it. Use high-frequency vibration equipment during the molding process to eliminate residual bubbles. The molding pressure is 35MPa;

[0069] The formed plank board is placed in a constant temperature and humidity environment for curing for 7 days, and then placed in a microwave sintering furnace to obtain the plank board. During the microwave sintering process, the modified nano perlite and modified nano sepiolite expand, which can fill the pores and improve the density and mechanical properties.

[0070] Among them, microwave sintering is specifically:

[0071] Preheating stage: from room temperature to 300℃, heating rate 10℃ / min, time 30min, slowly heating to remove residual moisture and organic volatiles in the blank to avoid cracking caused by rapid heating;

[0072] Medium temperature sintering stage: from 300℃ to 600℃, the heating rate is 15℃ / min, and the time is 20min, which promotes the initial combination of particles inside the green body and forms a preliminary sintering network;

[0073] High temperature sintering stage: from 600℃ to 900℃, with a heating rate of 20℃ / min and a time of 15min, so that the particles inside the green body are fully melted and a dense microstructure is formed;

[0074] Insulation stage: Insulation at 900℃ for 10 minutes to ensure that the material is evenly heated and reaches a high density state;

[0075] Cooling stage: furnace cooling or inert gas protection cooling, cooling rate 5℃ / min, to avoid rapid cooling leading to internal stress concentration of the material and cracks.

[0076] The preparation method of the modified nano perlite is as follows: 17.5 parts of perlite are taken by weight, the surface is cleaned, then crushed and ground, put into 55 parts of a 15% hypochlorous acid solution, pressurized to 1.5 atm in a closed container, heated in a water bath at 32° C. and stirred for 20 minutes, depressurized after cooling, filtered and washed with deionized water for 3 times, put into 70 parts of deionized water, then added with 8 parts of hexadecyltrimethylammonium bromide, stirred for reaction for 55 minutes, filtered and dried to obtain the modified nano perlite.

[0077] Furthermore, the preparation method of the modified nano-sepiolite is as follows: take 18 parts of sepiolite by weight, clean the surface, dry and then crush and grind; then add 12 times the weight and 20vt% hydrochloric acid solution, soak for 2.5 hours; filter and wash with deionized water for 3 times, then add to 8 times the weight of deionized water, add 12.5 parts of polyethylene glycol and 2 parts of sodium dodecyl sulfate, heat to 70°C, stir and react for 1.5 hours, filter and wash, add 8 times the weight of ethanol, then add 2 parts of methyltrimethoxysilane, heat to 55°C in a closed environment, stir and react for 1.5 hours, filter, wash and dry to obtain modified nano-sepiolite.

[0078] Furthermore, the preparation method of the modified betaine is as follows: dissolving betaine in deionized water to prepare a 15% solution; adding the betaine solution into a reactor, slowly adding epichlorohydrin, the molar ratio of the betaine to epichlorohydrin is 1:1.5, stirring the reaction at 45°C for 2.5 hours, after the reaction is completed, adding an appropriate amount of sodium hydroxide solution to neutralize the acidic substances in the reaction system, precipitating the reaction mixture with ethanol, filtering and collecting the precipitate, washing with ethanol several times, and vacuum drying the washed precipitate at 70°C to obtain modified betaine.

[0079] In this embodiment, the raw materials of the composite fiber include glass fiber, basalt fiber and nano-carbon fiber, and the mass ratio of the three is 1.5:2:1. The preparation method of the composite fiber is as follows: 17.5 parts of composite fiber raw materials, 1.5 parts of methyl methacrylate, and 2 parts of carboxymethyl cellulose are taken by weight, and mixed to obtain a mixture, and the mixture is added to the extrusion equipment for extrusion, and ethylenebisfatty acid amide is added from the side feed port of the extrusion equipment, mixed with the mixture and extruded together, and then cooled and granulated to obtain the composite fiber.

[0080] Example 4

[0081] The embodiment of the present invention provides a high-density silicon crystal stone plank board, such as Figure 1As shown, the following raw materials are included in parts by weight: 52 parts of silicon micropowder, 27 parts of quartz powder, 12 parts of silicate cement, 5 parts of modified nano-perlite, 8 parts of modified nano-sepiolite, 6 parts of modified betaine, 9 parts of composite fiber, 4 parts of water reducer, and 4 parts of silicon carbide micropowder. Preferably, the water reducer is a polycarboxylic acid water reducer. The preparation method of the high-density silicon crystal stone plank board includes the following steps:

[0082] Prepare the raw materials according to the ratio;

[0083] Add all raw materials into a vacuum mixer and mix them evenly, add an appropriate amount of water and stir under vacuum to form a uniform slurry without bubbles;

[0084] Pour the slurry into the mold and use a high-pressure molding machine to form it. Use high-frequency vibration equipment during the molding process to eliminate residual bubbles. The molding pressure is 40MPa;

[0085] The formed plank board is placed in a constant temperature and humidity environment for curing for 8 days, and then placed in a microwave sintering furnace to obtain the plank board. During the microwave sintering process, the modified nano perlite and modified nano sepiolite expand, which can fill the pores and improve the density and mechanical properties.

[0086] Among them, microwave sintering is specifically:

[0087] Preheating stage: from room temperature to 300℃, heating rate 10℃ / min, time 30min, slowly heating to remove residual moisture and organic volatiles in the blank to avoid cracking caused by rapid heating;

[0088] Medium temperature sintering stage: from 300℃ to 600℃, the heating rate is 15℃ / min, and the time is 20min, which promotes the initial combination of particles inside the green body and forms a preliminary sintering network;

[0089] High temperature sintering stage: from 600℃ to 900℃, with a heating rate of 20℃ / min and a time of 15min, so that the particles inside the green body are fully melted and a dense microstructure is formed;

[0090] Insulation stage: Insulation at 900℃ for 10 minutes to ensure that the material is evenly heated and reaches a high density state;

[0091] Cooling stage: furnace cooling or inert gas protection cooling, cooling rate 5℃ / min, to avoid rapid cooling leading to internal stress concentration of the material and cracks.

[0092] The preparation method of the modified nano perlite is as follows: 20 parts of perlite are taken by weight, the surface is cleaned, then crushed and ground, put into 60 parts of hypochlorous acid solution with a concentration of 20%, pressurized to 2atm in a closed container, heated in a water bath at 35°C and stirred for 30 minutes, depressurized after cooling, filtered and washed with deionized water for 3 times, put into 80 parts of deionized water, then added with 10 parts of hexadecyltrimethylammonium bromide, stirred for reaction for 60 minutes, filtered and dried to obtain the modified nano perlite.

[0093] Furthermore, the preparation method of the modified nano-sepiolite is as follows: take 20 parts of sepiolite by weight, clean the surface, dry and then crush and grind; then add 15 times the weight of a hydrochloric acid solution with a concentration of 25vt%, soak for 3 hours; filter and wash with deionized water for 3 times, then add to 10 times the weight of deionized water, add 15 parts of polyethylene glycol and 3 parts of sodium dodecyl sulfate, heat to 80°C, stir and react for 2 hours, filter and wash, add 10 times the weight of ethanol, then add 3 parts of methyltrimethoxysilane, heat to 60°C in a closed environment, stir and react for 2 hours, filter, wash and dry to obtain the modified nano-sepiolite.

[0094] Furthermore, the preparation method of the modified betaine is as follows: dissolving betaine in deionized water to prepare a 20% solution; adding the betaine solution into a reactor, slowly adding epichlorohydrin, the molar ratio of the betaine to epichlorohydrin is 1:2, stirring and reacting at 50°C for 3h, after the reaction is completed, adding an appropriate amount of sodium hydroxide solution to neutralize the acidic substances in the reaction system, precipitating the reaction mixture with ethanol, filtering and collecting the precipitate, washing with ethanol several times, and vacuum drying the washed precipitate at 80°C to obtain modified betaine.

[0095] In this embodiment, the raw materials of the composite fiber include glass fiber, basalt fiber and nano-carbon fiber, and the mass ratio of the three is 2:3:1. The preparation method of the composite fiber is as follows: take 20 parts of composite fiber raw materials, 2 parts of methyl methacrylate, and 3 parts of carboxymethyl cellulose by weight, mix them to obtain a mixture, add the mixture to an extrusion device for extrusion, and add ethylene bis fatty acid amide from the side feed port of the extrusion device, mix with the mixture and extrude them together, and then cool and granulate to obtain the composite fiber.

[0096] Example 5

[0097] The embodiment of the present invention provides a high-density silicon crystal stone plank board, such as Figure 1As shown, the following raw materials are included in parts by weight: 55 parts of silicon micropowder, 30 parts of quartz powder, 15 parts of silicate cement, 6 parts of modified nano perlite, 7 parts of modified nano sepiolite, 7 parts of modified betaine, 10 parts of composite fiber, 5 parts of water reducer, and 5 parts of silicon carbide micropowder. Preferably, the water reducer is a polycarboxylic acid water reducer. The preparation method of the high-density silicon crystal stone plank board includes the following steps:

[0098] Prepare the raw materials according to the ratio;

[0099] Add all raw materials into a vacuum mixer and mix them evenly, add an appropriate amount of water and stir under vacuum to form a uniform slurry without bubbles;

[0100] Pour the slurry into the mold and use a high-pressure molding machine to form it. Use high-frequency vibration equipment during the molding process to eliminate residual bubbles. The molding pressure is 40MPa;

[0101] The formed plank board is placed in a constant temperature and humidity environment for curing for 8 days, and then placed in a microwave sintering furnace to obtain the plank board. During the microwave sintering process, the modified nano perlite and modified nano sepiolite expand, which can fill the pores and improve the density and mechanical properties.

[0102] Among them, microwave sintering is specifically:

[0103] Preheating stage: from room temperature to 300℃, heating rate 10℃ / min, time 30min, slowly heating to remove residual moisture and organic volatiles in the blank to avoid cracking caused by rapid heating;

[0104] Medium temperature sintering stage: from 300℃ to 600℃, the heating rate is 15℃ / min, and the time is 20min, which promotes the initial combination of particles inside the green body and forms a preliminary sintering network;

[0105] High temperature sintering stage: from 600℃ to 900℃, with a heating rate of 20℃ / min and a time of 15min, so that the particles inside the green body are fully melted and a dense microstructure is formed;

[0106] Insulation stage: Insulation at 900℃ for 10 minutes to ensure that the material is evenly heated and reaches a high density state;

[0107] Cooling stage: furnace cooling or inert gas protection cooling, cooling rate 5℃ / min, to avoid rapid cooling leading to internal stress concentration of the material and cracks.

[0108] The preparation method of the modified nano perlite is as follows: 20 parts of perlite are taken by weight, the surface is cleaned, then crushed and ground, put into 60 parts of hypochlorous acid solution with a concentration of 20%, pressurized to 2atm in a closed container, heated in a water bath at 35°C and stirred for 30 minutes, depressurized after cooling, filtered and washed with deionized water for 3 times, put into 80 parts of deionized water, then added with 10 parts of hexadecyltrimethylammonium bromide, stirred for reaction for 60 minutes, filtered and dried to obtain the modified nano perlite.

[0109] Furthermore, the preparation method of the modified nano-sepiolite is as follows: take 20 parts of sepiolite by weight, clean the surface, dry and then crush and grind; then add 15 times the weight of a hydrochloric acid solution with a concentration of 25vt%, soak for 3 hours; filter and wash with deionized water for 3 times, then add to 10 times the weight of deionized water, add 15 parts of polyethylene glycol and 3 parts of sodium dodecyl sulfate, heat to 80°C, stir and react for 2 hours, filter and wash, add 10 times the weight of ethanol, then add 3 parts of methyltrimethoxysilane, heat to 60°C in a closed environment, stir and react for 2 hours, filter, wash and dry to obtain the modified nano-sepiolite.

[0110] Furthermore, the preparation method of the modified betaine is as follows: dissolving betaine in deionized water to prepare a 20% solution; adding the betaine solution into a reactor, slowly adding epichlorohydrin, the molar ratio of the betaine to epichlorohydrin is 1:2, stirring and reacting at 50°C for 3h, after the reaction is completed, adding an appropriate amount of sodium hydroxide solution to neutralize the acidic substances in the reaction system, precipitating the reaction mixture with ethanol, filtering and collecting the precipitate, washing with ethanol several times, and vacuum drying the washed precipitate at 80°C to obtain modified betaine.

[0111] In this embodiment, the raw materials of the composite fiber include glass fiber, basalt fiber and nano-carbon fiber, and the mass ratio of the three is 2:3:1. The preparation method of the composite fiber is as follows: take 20 parts of composite fiber raw materials, 2 parts of methyl methacrylate, and 3 parts of carboxymethyl cellulose by weight, mix them to obtain a mixture, add the mixture to an extrusion device for extrusion, and add ethylene bis fatty acid amide from the side feed port of the extrusion device, mix with the mixture and extrude them together, and then cool and granulate to obtain the composite fiber.

[0112] Comparative Example 1: Compared with Example 3, the modified nano-perlite is replaced by ordinary nano-perlite.

[0113] Comparative Example 2: Compared with Example 3, the modified nano-sepiolite is replaced by ordinary nano-sepiolite.

[0114] Comparative Example 3: Compared with Example 3, the modified betaine was replaced by ordinary betaine.

[0115] Comparative Example 4: Compared with Example 3, the modified nano-perlite is replaced by ordinary nano-perlite, the modified nano-sepiolite is replaced by ordinary nano-sepiolite, and the modified betaine is replaced by ordinary betaine.

[0116] Comparative Example 5: A commercially available silicon crystal stone plank board.

[0117] Performance Testing

[0118] The plank road panels of Examples 1-5 and Comparative Examples 1-5 were tested for their bulk density, axial compressive strength and flexural strength. The results are shown in Table 1 below:

[0119] Table 1. Test results of plank board performance

[0120]

[0121]

[0122] From the above results, it can be seen that the present invention provides a high-density silicon crystal stone plank road board with high density, more sturdy and durable, high compressive and flexural strength, especially by adding modified nano perlite, modified nano sepiolite and modified betaine, it has a synergistic effect and can further improve the mechanical properties.

[0123] It should be noted that, for the above embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described order of actions, because according to the present invention, some steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0124] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the present invention according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the present invention in essence, and these technical solutions also belong to the scope of protection of the present invention.

Claims

1. A high-density silicon crystal stone plank board, characterized in that: The invention comprises the following raw materials in parts by weight: 45-55 parts of silicon micropowder, 20-30 parts of quartz powder, 5-15 parts of silicate cement, 2-6 parts of modified nano perlite, 3-7 parts of modified nano sepiolite, 3-7 parts of modified betaine, 5-10 parts of composite fiber, 1-5 parts of water reducing agent and 1-5 parts of silicon carbide micropowder.

2. The high-density silicon crystal stone plank board according to claim 1, characterized in that: The invention comprises the following raw materials in parts by weight: 48-52 parts of silicon micropowder, 23-27 parts of quartz powder, 8-12 parts of silicate cement, 3-5 parts of modified nano perlite, 4-8 parts of modified nano sepiolite, 4-6 parts of modified betaine, 6-9 parts of composite fiber, 2-4 parts of water reducing agent and 2-4 parts of silicon carbide micropowder.

3. The high-density silicon crystal stone plank board according to claim 2, characterized in that: The invention comprises the following raw materials in parts by weight: 50 parts of silicon micropowder, 25 parts of quartz powder, 10 parts of silicate cement, 4 parts of modified nano perlite, 6 parts of modified nano sepiolite, 5 parts of modified betaine, 7.5 parts of composite fiber, 3 parts of water reducing agent and 3 parts of silicon carbide micropowder.

4. The high-density silicon crystal stone plank board according to claim 1, characterized in that: The preparation method of the modified nano-perlite is as follows: 15-20 parts of perlite are taken by weight, the surface is cleaned, then crushed and ground, put into 50-60 parts of hypochlorous acid solution with a concentration of 10-20%, pressurized to 1-2atm in a closed container, heated in a water bath at 30-35°C and stirred for 10-30min, depressurized after cooling, filtered and washed with deionized water for 2-3 times, put into 60-80 parts of deionized water, then add 5-10 parts of hexadecyltrimethylammonium bromide, stir for reaction for 50-60min, filtered and dried to obtain the modified nano-perlite.

5. The high-density silicon crystal stone plank board according to claim 1, characterized in that: The preparation method of the modified nano sepiolite is as follows: taking 15-20 parts of sepiolite by weight, cleaning the surface, drying and then crushing and grinding; then adding 10-15 times the weight of a hydrochloric acid solution with a concentration of 15-25vt%, soaking for 2-3 hours; filtering and washing with deionized water for 2-3 times, then adding to 5-10 times the weight of deionized water, adding 10-15 parts of polyethylene glycol and 1-3 parts of sodium dodecyl sulfate, heating to 60-80°C, stirring and reacting for 1-2 hours, filtering and washing, adding 5-10 times the weight of ethanol, then adding 1-3 parts of methyltrimethoxysilane, heating to 50-60°C in a closed environment, stirring and reacting for 1-2 hours, filtering, washing and drying to obtain the modified nano sepiolite.

6. The high-density silicon crystal stone plank board according to claim 1, characterized in that: The preparation method of the modified betaine is as follows: dissolving betaine in deionized water to prepare a 10-20% solution; adding the betaine solution into a reaction kettle, slowly adding epichlorohydrin in a dropwise manner, wherein the molar ratio of the betaine to the epichlorohydrin is 1:1-2, stirring and reacting at 40-50° C. for 2-3 hours, adding an appropriate amount of sodium hydroxide solution to neutralize the acidic substances in the reaction system after the reaction is completed, precipitating the reaction mixture with ethanol, filtering and collecting the precipitate, washing with ethanol for several times, and vacuum drying the washed precipitate at 60-80° C. to obtain the modified betaine.

7. The high-density silicon crystal stone plank board according to claim 1, characterized in that: The raw materials of the composite fiber include glass fiber, basalt fiber and nano-carbon fiber, and the mass ratio of the three is 1-2:1-3:

1.

8. The high-density silicon crystal stone plank board according to claim 7, characterized in that: The preparation method of the composite fiber is as follows: 15-20 parts by weight of the raw material of the composite fiber, 1-2 parts of methyl methacrylate, and 1-3 parts of carboxymethyl cellulose are taken and mixed to obtain a mixture, the mixture is added to an extrusion device for extrusion, and ethylene bis fatty acid amide is added from the side feed port of the extrusion device, mixed with the mixture and extruded together, and then cooled and granulated to obtain the composite fiber.

9. The method for preparing a high-density silicon crystal stone plank board according to any one of claims 1 to 8, characterized in that: The steps include: Prepare the raw materials according to the ratio; Add all raw materials into a vacuum mixer and mix them evenly, add an appropriate amount of water and stir under vacuum to form a uniform slurry without bubbles; The slurry is poured into a mold and formed using a high-pressure molding machine, and a high-frequency vibration device is used during the molding process; The formed plank board is placed in a constant temperature and humidity environment for curing for 6-8 days, and then placed in a microwave sintering furnace for treatment to obtain the plank board.

10. The high-density silicon crystal stone plank board according to claim 7, characterized in that: Microwave sintering is specifically as follows: Preheating stage: from room temperature to 300°C, heating rate 10°C / min, time 30min; Medium temperature sintering stage: from 300℃ to 600℃, heating rate 15℃ / min, time 20min; High temperature sintering stage: from 600℃ to 900℃, heating rate 20℃ / min, time 15min; Insulation stage: 10 min at 900℃; Cooling stage: furnace cooling or inert gas protection cooling, cooling rate 5℃ / min.

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