CN111348922B - Silicate system-based dispergator for enhancing slurry fluidity - Google Patents
Silicate system-based dispergator for enhancing slurry fluidity Download PDFInfo
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- CN111348922B CN111348922B CN202010101500.XA CN202010101500A CN111348922B CN 111348922 B CN111348922 B CN 111348922B CN 202010101500 A CN202010101500 A CN 202010101500A CN 111348922 B CN111348922 B CN 111348922B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
- C04B35/634—Polymers
- C04B35/63404—Polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B35/63444—Nitrogen-containing polymers, e.g. polyacrylamides, polyacrylonitriles, polyvinylpyrrolidone [PVP], polyethylenimine [PEI]
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/34—Esters containing nitrogen, e.g. N,N-dimethylaminoethyl (meth)acrylate
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
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Abstract
The invention discloses a silicate system-based dispergator for reinforcing the fluidity of slurry, which comprises the following components in parts by weight: 10-30 parts of a copolymer of an acrylic monomer and dimethylaminoethyl methacrylate; 3-8 parts of sodium metasilicate; 1-5 parts of sodium carbonate; 1-5 parts of sodium chloride. The debonder of the invention adopts the copolymerization reaction of dimethylaminoethyl methacrylate and acrylic monomer, the generated copolymer has the amphiprotic properties of hydrophilic groups and hydrophobic groups, a large number of tertiary amino structures exist in molecules, and the debonder is compounded with sodium metasilicate, sodium carbonate, sodium chloride and other substances, so that the debonder has good debonding effect.
Description
Technical Field
The invention relates to the technical field of ceramic industry, in particular to a silicate system-based dispergator for reinforcing the fluidity of slurry.
Background
The ceramic dispergator is a widely used ceramic additive used in the technological processes of mud selection, pulp grinding, glaze making and the like in the ceramic industry. The ceramic dispergator has the functions of improving the fluidity of the slurry, ensuring that the slurry has proper viscosity, good fluidity and good stability under the condition of reducing the moisture content, and improving the quality of the product.
The fluidity of the slurry is inversely proportional to the relative viscosity, and the slurry with good fluidity can ensure the quality of the green body and prevent the deformation of the green body. In the production of ceramics, the water content of the slurry is generally 33% to 36%, but at this high water content, the fluidity of the slurry containing clay minerals is still poor. When the viscosity of the slurry is too high, the fluidity is poor, the slurry feeding speed is too high, the slurry flows into a model to cause uneven thickness and uneven slurry surface of a blank, the slurry cannot flow completely during slurry discharge, and the defects of blank cracks and the like are easily generated during drying, thereby causing great difficulty for production, particularly molding.
At present, ceramic enterprises cannot solve the utilization problem of reclaimed materials and reclaimed acid water, and the main reason is that the materials have poor fluidity and are difficult to peptize. The most common debonders include inorganic debonders, low molecular organic debonders, and high molecular debonders.
The debonder is an inorganic debonder, such as sodium chloride, sodium silicate, sodium carbonate, sodium tripolyphosphate, etc., the use range of the inorganic debonder is limited due to the problems of the molecular weight and the molecular structure of the inorganic debonder, and the cost in the production process is increased due to the large addition amount of the inorganic debonder.
The dispergator is a low-molecular organic dispergator, such as sodium citrate, sodium ethylene diamine tetracetate, sodium hydroxyethyl ethylene diamine triacetate and the like, but the dispergation effect of the dispergator is poor.
The debonder is a high molecular debonder such as sodium polyacrylate, polyvinyl alcohol, polycarboxylic debonder, etc., of which the polycarboxylic debonder works best. The position and size of the hydrophobic group and the hydrophilic group of the macromolecular debonder are adjustable, and the molecular structure can be comb-shaped or branched, so that the macromolecular debonder has better covering and encapsulating effects on the surfaces of dispersed particles, and the dispersed system of the macromolecular debonder tends to be stable and flow more easily.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a silicate system-based debonder for enhancing the fluidity of slurry, which solves the traditional problems and has the advantages of simple components and good use effect.
The invention is realized by adopting the following technical scheme:
the invention provides a silicate system-based dispergator for reinforcing the fluidity of slurry, which comprises the following components in parts by weight:
10-30 parts of a copolymer of an acrylic monomer and dimethylaminoethyl methacrylate;
3-8 parts of sodium metasilicate;
1-5 parts of sodium carbonate;
1-5 parts of sodium chloride.
Further, the silicate system-based dispergator for enhancing the fluidity of the slurry comprises the following components in parts by weight:
15-28 parts of a copolymer of an acrylic monomer and dimethylaminoethyl methacrylate;
3-5 parts of sodium metasilicate;
1-3 parts of sodium carbonate;
1-3 parts of sodium chloride.
Further, the copolymer of the acrylic monomer and dimethylaminoethyl methacrylate comprises the following components in parts by weight: 20-40 parts of acrylic monomer; 25-50 parts of dimethylaminoethyl methacrylate; 1-5 parts of an initiator; 5-15 parts of a cross-linking agent; 5-10 parts of sodium hydroxide; 0.1 to 1 portion of emulsifier; 30-60 parts of deionized water.
Further, the preparation method of the copolymer of the acrylic monomer and the dimethylaminoethyl methacrylate comprises the following steps:
under the condition of ice-water bath, adding an acrylic acid monomer into a reaction kettle, adding a sodium hydroxide aqueous solution to partially neutralize the acrylic acid monomer, sequentially adding dimethylaminoethyl methacrylate, a cross-linking agent and partial deionized water, uniformly stirring, preheating in a water bath at 80-90 ℃ for 0.5-1 h to form a first mixed solution;
putting the emulsifier in a beaker, adding the rest deionized water, heating to 80-120 ℃, stirring for dissolving, and controlling the stirring time to be 30-40 min to form a second mixed solution;
and uniformly mixing the first mixed solution and the second mixed solution, adding an initiator to perform polymerization reaction in a water bath at the temperature of 80-90 ℃, performing heat preservation reaction for 0.5-1.5 h, cooling to room temperature, filtering, drying, grinding, sieving and discharging to obtain the copolymer of the acrylic monomer and the dimethylaminoethyl methacrylate.
Further, the acrylic monomer is one or a combination of more of butenedioic acid, acrylic acid and methacrylic acid.
Further, the acrylic monomer comprises 1.
Further, the mass ratio of the acrylic monomer to dimethylaminoethyl methacrylate is 1.
Further, the cross-linking agent is N, N-methylene bisacrylamide; the initiator is one or the combination of more of ammonium persulfate, potassium persulfate and sodium persulfate.
Further, the emulsifier is one or more of dioctyl sodium sulfosuccinate, sorbitol oleate and polyoxyethylene sorbitan monostearate.
Further, the mass ratio of the copolymer of the acrylic monomer and the dimethylaminoethyl methacrylate to the sodium metasilicate is 4-8:1.
compared with the prior art, the invention has the beneficial effects that:
the debonder of the invention adopts the copolymerization reaction of dimethylaminoethyl methacrylate and acrylic monomer, the generated copolymer has the amphiprotic properties of hydrophilic groups and hydrophobic groups, a large number of tertiary amino structures exist in molecules, and the debonder is compounded with sodium metasilicate, sodium carbonate, sodium chloride and other substances, so that the debonder has good debonding effect.
Detailed Description
The present invention is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment.
The invention provides a silicate system-based dispergator for reinforcing the fluidity of slurry, which comprises the following components in parts by weight:
10-30 parts of a copolymer of an acrylic monomer and dimethylaminoethyl methacrylate;
3-8 parts of sodium metasilicate;
1-5 parts of sodium carbonate;
1-5 parts of sodium chloride.
Specifically, in the copolymer of the acrylic monomer and the dimethylaminoethyl methacrylate, because the molecules of the dimethylaminoethyl methacrylate contain tertiary amino, ester and unsaturated double bonds, the copolymer can be copolymerized with the acrylic monomer, and the reaction product has good hydrophilic and hydrophobic properties, so that the copolymer of the acrylic monomer and the dimethylaminoethyl methacrylate can still play a role in dispersing in the form of steric hindrance acting force after being dissolved in water, and still has good dispergation effect in the environment with lower solution pH. In this embodiment, the copolymer of acrylic monomer and dimethylaminoethyl methacrylate comprises the following components in parts by weight: 20-40 parts of acrylic monomer; 25-50 parts of dimethylaminoethyl methacrylate; 1-5 parts of an initiator; 5-15 parts of a cross-linking agent; 5-10 parts of sodium hydroxide; 0.1 to 1 portion of emulsifier; 30-60 parts of deionized water.
The preparation method of the copolymer of the acrylic monomer and the dimethylaminoethyl methacrylate comprises the following steps:
under the condition of ice-water bath, adding an acrylic monomer into a reaction kettle, adding a sodium hydroxide aqueous solution to partially neutralize the acrylic monomer, sequentially adding dimethylaminoethyl methacrylate, a cross-linking agent and partial deionized water, uniformly stirring, preheating in a water bath at 80-90 ℃, and preheating for 0.5-1 h to form a first mixed solution;
putting the emulsifier in a beaker, adding the rest deionized water, heating to 80-120 ℃, stirring for dissolving, and controlling the stirring time to be 30-40 min to form a second mixed solution;
and uniformly mixing the first mixed solution and the second mixed solution, adding an initiator to perform polymerization reaction in a water bath at the temperature of 80-90 ℃, performing heat preservation reaction for 0.5-1.5 h, cooling to room temperature, filtering, drying, grinding, sieving and discharging to obtain the copolymer of the acrylic monomer and the dimethylaminoethyl methacrylate.
Wherein, the acrylic monomer is one or a combination of more of butenedioic acid, acrylic acid and methacrylic acid. Preferably, the acrylic acid monomer consists of 1.
Further, the mass ratio of the acrylic monomer to the dimethylaminoethyl methacrylate is 1. The cross-linking agent is N, N-methylene bisacrylamide. The initiator is one or the combination of more of ammonium persulfate, potassium persulfate and sodium persulfate. The emulsifier is one or more of dioctyl sodium sulfosuccinate, sorbitol oleate and polyoxyethylene sorbitan monostearate. The mass ratio of the copolymer of acrylic acid monomer and dimethylaminoethyl methacrylate to the sodium metasilicate is 4-8:1.
in another embodiment, the silicate system-based dispergator for enhancing the fluidity of the slurry comprises the following components in parts by weight:
15-28 parts of a copolymer of an acrylic monomer and dimethylaminoethyl methacrylate;
3-5 parts of sodium metasilicate;
1-3 parts of sodium carbonate;
1-3 parts of sodium chloride.
The preparation method of the silicate system-based dispergator for enhancing the fluidity of the slurry comprises the following steps: and (3) uniformly mixing the copolymer of the acrylic monomer and the dimethylaminoethyl methacrylate, the sodium metasilicate, the sodium carbonate and the sodium chloride by a dry method to obtain the dispergator.
The application method of the debonder comprises the following specific operations: ball milling or pulping or forming is carried out on the ceramic blank and the raw materials according to 0.05-0.6 percent of the dry material amount of the ceramic blank.
The following are specific examples of the present invention, and raw materials, equipments and the like used in the following examples can be obtained by purchasing them unless otherwise specified.
Example 1
And (3) putting 10 parts of copolymer of acrylic monomer and dimethylaminoethyl methacrylate, 3 parts of sodium metasilicate, 1 part of sodium carbonate and 1 part of sodium chloride into a mixer, uniformly stirring for 1 hour to obtain the dispergator.
The copolymer of acrylic monomer and dimethylaminoethyl methacrylate comprises the following components in parts by weight: 30 parts of acrylic monomers; 30 parts of dimethylaminoethyl methacrylate; 3 parts of an initiator; 10 parts of a crosslinking agent; 8 parts of sodium hydroxide; 0.5 part of emulsifier; 60 parts of deionized water. The acrylic acid monomer comprises 1. The cross-linking agent is N, N-methylene bisacrylamide. The emulsifier is dioctyl sodium sulfosuccinate. The initiator is ammonium persulfate.
Example 2
Example 2 differs from example 1 in that: the dispergator comprises the following components in parts by weight: 15 parts of a copolymer of an acrylic monomer and dimethylaminoethyl methacrylate, 3 parts of sodium metasilicate, 1 part of sodium carbonate and 1 part of sodium chloride.
Example 3
Example 3 differs from example 1 in that: the dispergator comprises the following components in parts by weight: 20 parts of a copolymer of acrylic monomers and dimethylaminoethyl methacrylate, 5 parts of sodium metasilicate, 3 parts of sodium carbonate and 3 parts of sodium chloride.
Example 4
Example 4 differs from example 1 in that: the dispergator comprises the following components in parts by weight: 22 parts of a copolymer of acrylic monomers and dimethylaminoethyl methacrylate, 4 parts of sodium metasilicate, 2 parts of sodium carbonate and 2 parts of sodium chloride.
Example 5
Example 5 differs from example 1 in that: the dispergator comprises the following components in parts by weight: 28 parts of a copolymer of acrylic monomers and dimethylaminoethyl methacrylate, 5 parts of sodium metasilicate, 3 parts of sodium carbonate and 3 parts of sodium chloride.
Example 6
Example 6 differs from example 1 in that: the dispergator comprises the following components in parts by weight: 30 parts of a copolymer of acrylic monomers and dimethylaminoethyl methacrylate, 8 parts of sodium metasilicate, 5 parts of sodium carbonate and 5 parts of sodium chloride.
Example 7
Example 7 differs from example 6 in that: the copolymer of the acrylic monomer and the dimethylaminoethyl methacrylate comprises the following components in parts by weight: 30 parts of acrylic monomers; 25 parts of dimethylaminoethyl methacrylate; 3 parts of an initiator; 10 parts of a crosslinking agent; 8 parts of sodium hydroxide; 0.5 part of emulsifier; 60 parts of deionized water.
In the above embodiments, each material is not limited to the above components, and each material may also be composed of other single components or multiple components described in the present invention, and the component parts of each material are not limited to the above parts, and the component parts of each material may also be a combination of other component parts described in the present invention, and are not described herein again.
Comparative example 1
Comparative example 1 is a dispergator which differs from example 1 in that the feedstock of comparative example 1 does not use sodium metasilicate.
Comparative example 2
Comparative example 1 is a dispergator which differs from example 1 in that the raw material of comparative example 1 does not use a copolymer of acrylic monomers and dimethylaminoethyl methacrylate, but uses sodium polyacrylate.
And (4) performance testing:
(1) Test product
Examples 1 to 7, comparative example 1 and comparative example 2
(2) Experimental method
Ball-milling the ceramic blank and the raw materials according to 0.1 percent of the dry material amount of the ceramic blank to prepare slurry; dividing the slurry after the PH adjustment into two parts, placing the first part for 30s, and testing the outflow time of the slurry, and recording as t1; after the second portion is placed for 30min, the outflow time of the second portion is tested and is marked as t2; in which the flow-out time was measured using a four-bar viscometer.
(3) The test results are shown in table 1 below.
TABLE 1 test results
As can be seen from the data in Table 1, compared with comparative examples 1-2, the use of a small amount of the debonder of the present invention can significantly improve the fluidity of the ceramic slurry, and still has a good debonding effect in an environment with a low pH of the solution.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (4)
1. The dispergator for enhancing the fluidity of the slurry of a silicate system is characterized by comprising the following components in parts by weight:
10-30 parts of a copolymer of an acrylic monomer and dimethylaminoethyl methacrylate;
3-8 parts of sodium metasilicate;
1-5 parts of sodium carbonate;
1-5 parts of sodium chloride;
the mass ratio of the copolymer of the acrylic acid monomer and the dimethylaminoethyl methacrylate to the sodium metasilicate is 4-8:1;
the copolymer of the acrylic monomer and the dimethylaminoethyl methacrylate comprises the following components in parts by weight: 20-40 parts of acrylic monomer; 25-50 parts of dimethylaminoethyl methacrylate; the mass ratio of the acrylic monomer to the dimethylaminoethyl methacrylate is 1.
2. The debonder for enhancing slurry flowability of a silicate system according to claim 1, comprising the following components in parts by weight:
15-28 parts of a copolymer of an acrylic monomer and dimethylaminoethyl methacrylate;
3-5 parts of sodium metasilicate;
1-3 parts of sodium carbonate;
1-3 parts of sodium chloride.
3. The debonder for enhancing slurry flowability of a silicate system according to claim 1, wherein the copolymer of acrylic acid monomer and dimethylaminoethyl methacrylate further comprises the following components in parts by weight: 1-5 parts of an initiator; 5-15 parts of a cross-linking agent; 5-10 parts of sodium hydroxide; 0.1 to 1 portion of emulsifier; 30-60 parts of deionized water; the cross-linking agent is N, N-methylene bisacrylamide; the initiator is one or a combination of more of ammonium persulfate, potassium persulfate and sodium persulfate; the emulsifier is one or a combination of more of dioctyl sodium sulfosuccinate, sorbitol oleate and polyoxyethylene sorbitan monostearate.
4. The debonder for enhancing slurry mobility of a silicate system according to claim 3, wherein the preparation method of the copolymer of acrylic acid monomer and dimethylaminoethyl methacrylate comprises the following steps:
under the condition of ice-water bath, adding an acrylic acid monomer into a reaction kettle, adding a sodium hydroxide aqueous solution to partially neutralize the acrylic acid monomer, sequentially adding dimethylaminoethyl methacrylate, a cross-linking agent and partial deionized water, uniformly stirring, placing in a water bath at 80-90 ℃ for preheating, and preheating for 0.5-1 h to form a first mixed solution, wherein the acrylic acid monomer is one or more of butenedioic acid, acrylic acid and methacrylic acid; the acrylic acid monomer consists of 1;
putting the emulsifier in a beaker, adding the rest deionized water, heating to 80-120 ℃, stirring for dissolving, and controlling the stirring time to be 30-40 min to form a second mixed solution;
and uniformly mixing the first mixed solution and the second mixed solution, adding an initiator to perform polymerization reaction in a water bath at the temperature of 80-90 ℃, performing heat preservation reaction for 0.5-1.5 h, cooling to room temperature, filtering, drying, grinding, sieving, and discharging to obtain the copolymer of the acrylic monomer and the dimethylaminoethyl methacrylate.
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| CN112851372B (en) * | 2021-01-22 | 2023-06-27 | 佛山市山有海科技有限公司 | Solid dispergation enhancer and preparation method thereof |
| CN112960985B (en) * | 2021-01-22 | 2023-06-16 | 佛山市山有海科技有限公司 | Liquid dispergation enhancer and preparation method thereof |
| CN116375481A (en) * | 2023-04-12 | 2023-07-04 | 佛山市釉创科技有限公司 | Efficient dispergator special for rock plates |
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