CN111848074A - Antistatic floor based on magnesium silicate cementing material and preparation method - Google Patents

Antistatic floor based on magnesium silicate cementing material and preparation method Download PDF

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Publication number
CN111848074A
CN111848074A CN202010709031.XA CN202010709031A CN111848074A CN 111848074 A CN111848074 A CN 111848074A CN 202010709031 A CN202010709031 A CN 202010709031A CN 111848074 A CN111848074 A CN 111848074A
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magnesium silicate
antistatic floor
antistatic
light
floor based
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CN202010709031.XA
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Inventor
毕万利
王梓涵
房卉
滕莹雪
关岩
孙美硕
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University of Science and Technology Liaoning USTL
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University of Science and Technology Liaoning USTL
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/10Lime cements or magnesium oxide cements
    • C04B28/105Magnesium oxide or magnesium carbonate cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/60Flooring materials
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/90Electrical properties
    • C04B2111/905Anti-static materials
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/90Electrical properties
    • C04B2111/94Electrically conducting materials
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Floor Finish (AREA)

Abstract

The invention provides an antistatic floor based on a magnesium silicate cementing material and a preparation method thereof. The antistatic floor is prepared by taking magnesium silicate-based cementing material as a main body, adding mineral fiber, graphite powder and reinforcing material, and carrying out chemical action and intermolecular grain composition. The invention utilizes industrial byproducts, ensures the performances of stability, antistatic property, water resistance, heat insulation and the like of the antistatic floor, solves the problems of high cost, insufficient environmental protection and the like of the antistatic floor in the prior art, and has profound influence on the development of magnesium resources and the preparation of the antistatic floor in the future.

Description

Antistatic floor based on magnesium silicate cementing material and preparation method
Technical Field
The invention relates to the technical field of antistatic floors, in particular to an antistatic floor based on magnesium silicate cementing materials and a preparation method thereof.
Background
The types of flooring currently on the market are classified according to the purpose: household, antistatic flooring, commercial, etc. Different from the household floor, the floor used in the industrial factory building generally requires the floor to have the characteristics of pressure resistance, seamless performance, wear resistance and the like so as to meet different industrial production environments. For precision electronics, computer rooms and the like, the ground is required to have the characteristics, and the ground also has the antistatic performance, wherein static electricity is one of the most difficult hazards to eliminate of the precision electronics and the computer rooms, so that random faults, operation errors or processing information errors can occur during the operation of a computer, and certain precision components can be possibly out of order or even damaged.
The domestic antistatic floor adopts a wooden floor, a PVC antistatic floor, antistatic paint brushing and the like. At present, the wood floor has larger output and sales volume, but has more defects, such as over-standard formaldehyde concentration, poor flame-retardant and waterproof performance, poor antistatic performance, poor impact resistance and the like. Meanwhile, other anti-static floors are poor in hardness and wear resistance, and some of the anti-static floors even cannot meet the existing experimental use requirements.
At present, in the existing technology for preparing the antistatic floor, the calcium sulfate antistatic floor is prepared as a main method. For example, chinese patent CN108191366A discloses a method for preparing a calcium sulfate antistatic floor, which comprises weighing calcium sulfate, perlite, diatom ooze particles, graphite powder, mineral fibers and quicklime, adding into a stirrer, and stirring; adding plant fiber powder to obtain a mixture, and adding water to obtain a uniform mixture; after standing, sequentially adding an impact modifier and an antistatic agent, and stirring to obtain a mixed base material; standing the mixed base material for 6h at 25 ℃ under the environment with the humidity of 80%; and after standing, mixing the base materials, putting the mixture into a hot stamping extruder through a paving machine and a filler metering device to obtain the calcium sulfate antistatic floor. Chinese patent CN108912788A discloses a water-based epoxy antistatic floor paint and a preparation method thereof, wherein an epoxy curing agent, deionized water, a defoaming agent, a dispersing agent, an anti-floating-color-forming agent, talcum powder, white carbon black, barium sulfate, a base material wetting agent and conductive powder are adopted; epoxy resin and aliphatic glycidyl ether are used for preparing the antistatic floor coating. The calcium sulfate floor has excellent performances of flame retardance, skid resistance, sound insulation, dust prevention, pollution resistance, corrosion resistance and the like, but the impact resistance is poor, and the surface of the prepared floor is rough; meanwhile, the antistatic coating has high cost and chemical residues, which influence or even harm health. Therefore, the preparation of the green antistatic floor with good surface gloss and low cost is particularly important.
Most of the antistatic floors prepared by the prior art adopt antistatic paint, the antistatic floors can meet the use requirements by the method, but the price is higher, and industrial chemical reagents are mostly adopted, so that the problems of reagent dissolution and the like exist. Meanwhile, the floors used in the decoration field adopt clay and wall decoration materials using cement as a gelling agent, and although the floors have the advantages of high strength, good durability and the like, the floors have large capacity, poor antistatic, sound insulation and heat insulation properties, so that the application range of the floors is limited, and the stability of the floors and the uniformity of the distribution of the conductive performance are poor.
The magnesium silicate-based cementing material is prepared by taking light-burned magnesia powder prepared from magnesite as a raw material, adding industrial silica fume, an additive and water, has good fire resistance and can be used for preparing a fireproof castable material; the antistatic performance is good; the surface gloss is good; excellent fluidity. Is generally used for curing harmful wastes (such as nuclear wastes), fire-proof and heat-insulating boards, and the like. The excellent properties of the magnesium silicate-based cement, which is a green cement prepared from 90% of industrial waste, enable the application thereof to more and more fields. Therefore, the antistatic floor prepared based on the magnesium silicate-based cementing material has positive significance for the green development of future antistatic.
Disclosure of Invention
The invention aims to provide an antistatic floor based on a magnesium silicate cementing material and a preparation method thereof, which overcome the defects of the prior art, adopt light-burned magnesia powder produced by magnesite tailings, industrial waste silica fume and the like as raw materials, and add a water reducing agent, mineral fibers and the like to obtain the antistatic floor with good effect, solve the problems of overhigh cost, poor waterproofness, formaldehyde pollution and the like of the antistatic floor in the prior art, simultaneously utilize various industrial wastes which are difficult to treat, furthest reduce the cost for preparing the antistatic floor and coordinate the development of resources.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the technical scheme is as follows: an antistatic floor based on magnesium silicate cementing materials is characterized by comprising the following raw materials in parts by weight: 30-45 parts of magnesium silicate based cementing material, 10-15 parts of mineral fiber, 1-5 parts of graphite powder, 8-10 parts of reinforcing material and 0.5-1 part of water reducing agent.
The magnesium silicate-based cementing material is formed by mixing light-burned magnesia powder, silica fume and water, wherein the content of active magnesia measured by a citric acid method of the light-burned magnesia powder is more than or equal to 85 percent, the testing time is 16-20 s, and the mass ratio of the light-burned magnesia powder to the silica fume is 0.6-1; the mass ratio of the mixture of the light-burned magnesia powder and the silica fume to water is 1.5-2: 1.
The water reducing agent is any one or more than two of sodium hexametaphosphate, sodium tripolyphosphate or sodium metasilicate.
The mineral fiber has a specific surface area of 5-50 m2One or two of chrysotile and sepiolite in a ratio of/g.
The reinforcing material is carbon fiber with thickness of 0.7 micron and length of 1-6 mm.
The second technical proposal is that: a preparation method of an antistatic floor based on a magnesium silicate cementing material is characterized by comprising the following steps:
(1) dry mixing of raw materials: weighing light-burned magnesia powder, silica fume, sepiolite, carbon fiber and graphite powder, and putting the light-burned magnesia powder, the silica fume, the sepiolite, the carbon fiber and the graphite powder into a stirrer with 80-100 revolutions/min for dry mixing, wherein the dry mixing time is controlled to be 3-4 minutes;
(2) dissolving a reagent: adding water into a water reducing agent, and mixing uniformly to prepare a solution;
(3) mixing solid and liquid: adding the dry mixture prepared in the step (1) into the solution obtained in the step (2), stirring by using a stirrer of 60-100 revolutions per minute for 3-4 minutes according to GB/T9142-1988 technical conditions of concrete mixers, and obtaining the required magnesium silicate-based cementing material slurry;
(4) vibrating and exhausting: molding the cementing material slurry by casting, and performing vibration exhaust;
(5) standing the slurry: standing the uniform mixture;
(6) And (3) pressing and forming: and after standing, the mixed base material is filled into a device through a spreading machine and a metering device, enters a hot stamping extruder, and is subjected to hot stamping under the pressure of 8-10MPa and at the temperature of 60-80 ℃ to prepare the magnesium silicate based cementitious material antistatic floor.
The standing condition in the step (5) is as follows: the temperature is 18-24 ℃, the humidity is 70-90%, and the standing time is 30-60 min.
Compared with the prior art, the invention has the beneficial effects that:
1) the method comprises the steps of preparing magnesium silicate system gel material from light-burned magnesium oxide powder prepared from low-grade magnesite tailings, silicon ash formed by ferroalloy ferrosilicon process waste products, graphite powder and mineral fiber serving as raw materials through chemical action and intermolecular particle grading, and performing compression molding to prepare the antistatic floor with the resistance of 1 × 10-5~1*10-9(ii) a The limit load is more than or equal to 13350N; when the load is concentrated on 4450N, the winding degree is less than or equal to 2mm, and the permanent deformation is less than or equal to 0.25 mm; when the rolling load is 3560N, the winding degree is less than or equal to 2mm, and the permanent deformation is less than or equal to 0.5 mm; when the load is uniformly distributed at 2300N, the winding degree is less than or equal to 2mm, the requirement of national standard B common type is met, and the method is suitable for the requirements of computer rooms or industrial plants.
2) The whole process not only realizes the reutilization of magnesite tailing waste resources, but also opens up the new application of magnesite tailing light-burned magnesia powder, and greatly reduces the cost of raw materials of the whole process; the antistatic floor prepared from the prepared magnesium silicate cementing material has good antistatic performance, excellent water resistance and impact resistance, and no pollution, more than 90% of main raw materials of the whole antistatic floor are made of wastes, so that energy conservation and emission reduction are really realized, and good economic benefits are brought.
Detailed Description
The following examples are presented to further illustrate embodiments of the present invention:
exemplary embodiments of the present disclosure will be described in detail below, however, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The raw material components used in the following examples of the present invention are all commercially available, and the reagents used in the examples of the present invention are all chemically pure.
Example 1
The invention relates to an antistatic floor based on magnesium silicate cementing materials, which comprises the following raw materials: 150g of light-burned magnesia powder, 150g of silica fume, 200g of water, 5g of sodium hexametaphosphate, 2.5g of graphite powder, 30g of carbon fiber and 30g of sepiolite.
The invention relates to a preparation method for preparing an antistatic floor based on a magnesium silicate cementing material, which comprises the following steps:
(1) dry mixing of raw materials: weighing light-burned magnesia powder, silica fume, sepiolite, carbon fiber and graphite powder, and putting the light-burned magnesia powder, the silica fume, the sepiolite, the carbon fiber and the graphite powder into a stirrer with 80-100 revolutions/min for dry mixing, wherein the dry mixing time is controlled to be 3-4 minutes;
(2) dissolving a reagent: weighing a selected amount of sodium hexametaphosphate, adding the weighed water, and mixing and stirring for 2-3 minutes by using a stirrer to prepare a solution;
(3) Mixing solid and liquid: and (2) adding the dry mixed material obtained in the step (1) into the solution, and stirring by using a stirrer of 60-100 revolutions per minute for 6-8 minutes according to GB/T9142-1988 technical conditions of concrete mixers to obtain the required magnesium silicate-based cementing material slurry.
(4) Vibrating and exhausting: carrying out casting molding on the magnesium silicate-based cementing material slurry, and carrying out vibration exhaust to ensure that the obtained magnesium silicate cementing material is more compact;
(5) standing the slurry: placing the uniform mixture at 20 deg.C and humidity of 70%, and standing for 30-60 min;
(6) and (3) pressing and forming: and after standing, the mixed base material is filled into a device through a spreading machine and a metering device, enters a hot stamping extruder, and is subjected to hot stamping under the pressure of 8-10MPa and at the temperature of 60-80 ℃ to prepare the magnesium silicate based cementitious material antistatic floor.
Example 2
The invention relates to an antistatic floor based on magnesium silicate cementing materials, which comprises the following raw materials: 140g of light-burned magnesia powder, 150g of silica fume, 180g of water, 5g of sodium hexametaphosphate, 5g of graphite powder, 30g of carbon fiber and 30g of chrysotile.
The preparation method of the antistatic floor based on the magnesium silicate gel material is the same as that of the example 1.
Example 3
The invention relates to an antistatic floor based on magnesium silicate cementing material, which comprises the following raw materials: 120g of light-burned magnesia powder, 150g of silica fume, 180g of water, 5g of sodium hexametaphosphate, 7.5g of graphite powder, 40g of carbon fiber, and 40g of chrysotile and sepiolite (mixed according to the proportion of 1: 1).
The preparation method of the antistatic floor based on the magnesium silicate gel material is the same as that of the example 1.
Comparative example
The comparative example is a commercially available calcium sulfate antistatic floor.
Examples 1-3 above produced 600 x 32mm floorings and tested the results in accordance with standard test load SJ/T10796-2001-B, standard resistance (Ω) SJ/T10796-2001, and comparative example to the currently available calcium sulfate antistatic floorings in accordance with table 1 below.
Table 1 results of performance test of experimental samples of each example
Figure DEST_PATH_IMAGE002
From the data in the above table, the antistatic floor prepared based on the magnesium silicate cementing material is prepared by taking the magnesium silicate cementing material as a main body, adding mineral fiber, graphite powder and a reinforcing material, and preparing the antistatic floor through chemical action and intermolecular particle grading.
It is clear that the process according to the invention is only a preferred embodiment and is not intended to limit the scope of protection of the invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims (7)

1. An antistatic floor based on magnesium silicate cementing materials is characterized by comprising the following raw materials in parts by weight: 30-45 parts of magnesium silicate based cementing material, 10-15 parts of mineral fiber, 1-5 parts of graphite powder, 8-10 parts of reinforcing material and 0.5-1 part of water reducing agent.
2. The antistatic floor based on magnesium silicate gel material as claimed in claim 1, wherein the magnesium silicate gel material is formed by mixing light-burned magnesia powder, silica fume and water, the content of active magnesia measured by a citric acid method of the light-burned magnesia powder is more than or equal to 85 percent, the test time is 16-20 s, and the mass ratio of the light-burned magnesia powder to the silica fume is 0.6-1; the mass ratio of the mixture of the light-burned magnesia powder and the silica fume to water is 1.5-2: 1.
3. The antistatic floor based on magnesium silicate gel material as claimed in claim 2, wherein the water reducing agent is any one or a mixture of more than two of sodium hexametaphosphate, sodium tripolyphosphate or sodium metasilicate.
4. The antistatic floor based on magnesium silicate gel material as claimed in claim 1, wherein the mineral fiber has a specific surface area of 5-50 m2One or two of chrysotile and sepiolite in a ratio of/g.
5. The antistatic floor based on magnesium silicate gel material as claimed in claim 1, wherein the reinforcing material is carbon fiber with thickness of 0.7 μm and length of 1-6 mm.
6. A preparation method of an antistatic floor based on a magnesium silicate cementing material is characterized by comprising the following steps:
(1) dry mixing of raw materials: weighing light-burned magnesia powder, silica fume, sepiolite, carbon fiber and graphite powder, and putting the light-burned magnesia powder, the silica fume, the sepiolite, the carbon fiber and the graphite powder into a stirrer with 80-100 revolutions/min for dry mixing, wherein the dry mixing time is controlled to be 3-4 minutes;
(2) dissolving a reagent: adding water into a water reducing agent, and mixing uniformly to prepare a solution;
(3) mixing solid and liquid: adding the dry mixture prepared in the step (1) into the solution obtained in the step (2), stirring by using a stirrer of 60-100 revolutions per minute for 3-4 minutes according to GB/T9142-1988 technical conditions of concrete mixers, and obtaining the required magnesium silicate-based cementing material slurry;
(4) vibrating and exhausting: molding the cementing material slurry by casting, and vibrating and exhausting;
(5) standing the slurry: standing the uniform mixture;
(6) and (3) pressing and forming: and after standing, the mixed base material is filled into a device through a spreading machine and a metering device, enters a hot stamping extruder, and is subjected to hot stamping under the pressure of 8-10MPa and at the temperature of 60-80 ℃ to prepare the magnesium silicate based cementitious material antistatic floor.
7. The method for preparing the antistatic floor based on the magnesium silicate gel material as claimed in claim 6, wherein the method comprises the following steps: the standing condition in the step (5) is as follows: the temperature is 18-24 ℃, the humidity is 70-90%, and the standing time is 30-60 min.
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Cited By (4)

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Publication number Priority date Publication date Assignee Title
CN112500043A (en) * 2020-12-03 2021-03-16 西安市未来星地板有限公司 Anti-static floor and method for preparing anti-static base material
CN113816718A (en) * 2021-09-28 2021-12-21 西南科技大学 Light wall board for building and preparation method thereof
WO2022124996A1 (en) * 2020-12-10 2022-06-16 Nanyang Technological University Strain hardening magnesium silicate hydrate composites (shmshc)
WO2022154774A3 (en) * 2021-01-12 2022-09-22 Hacettepe Universitesi Rektorluk Composite coating material with cement binder and production method thereof

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112500043A (en) * 2020-12-03 2021-03-16 西安市未来星地板有限公司 Anti-static floor and method for preparing anti-static base material
WO2022124996A1 (en) * 2020-12-10 2022-06-16 Nanyang Technological University Strain hardening magnesium silicate hydrate composites (shmshc)
WO2022154774A3 (en) * 2021-01-12 2022-09-22 Hacettepe Universitesi Rektorluk Composite coating material with cement binder and production method thereof
CN113816718A (en) * 2021-09-28 2021-12-21 西南科技大学 Light wall board for building and preparation method thereof

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Application publication date: 20201030