CN108641048B - Preparation method of salt-tolerant attapulgite composite thickener - Google Patents
Preparation method of salt-tolerant attapulgite composite thickener Download PDFInfo
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- CN108641048B CN108641048B CN201810446471.3A CN201810446471A CN108641048B CN 108641048 B CN108641048 B CN 108641048B CN 201810446471 A CN201810446471 A CN 201810446471A CN 108641048 B CN108641048 B CN 108641048B
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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
- C08F292/00—Macromolecular compounds obtained by polymerising monomers on to inorganic materials
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/52—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing synthetic macromolecular substances
- D06P1/5207—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- D06P1/525—Polymers of unsaturated carboxylic acids or functional derivatives thereof
- D06P1/5257—(Meth)acrylic acid
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Abstract
The invention relates to a preparation method of a salt-tolerant attapulgite composite thickener, which takes N, N-diallyl oleamide with a long hydrophobic chain and vinyl silane coupling agent modified attapulgite as a cross-linking agent to be copolymerized with an acrylic monomer, and simultaneously, a small amount of hydrophilic monomer 2-hydroxy-3-allyloxy sodium propanesulfonate is added in the polymerization process, so that the thickener has excellent thickening performance and electrolyte resistance.
Description
Technical Field
The invention belongs to the field of textile printing, and particularly relates to a preparation method of a salt-tolerant attapulgite composite thickener.
Background
The textile printing is realized by preparing dye and chemicals into printing paste with certain viscosity under the action of a thickening agent, and the printing thickening agent is an important component of the printing paste, so that the printing effect of the textile printing is directly influenced by the performance of the printing thickening agent.
The anionic polyacrylic acid thickener is one of the main varieties of textile printing thickeners, the main chain of the macromolecule contains a large number of carboxyl groups, and by virtue of the charge repulsion generated by the carboxyl groups in an ionization state, the molecular chain is fully extended, the hydrodynamic volume is increased, and the system viscosity is increased. During textile printing, some electrolytes are used to reduce the repulsion between the polyacrylic acid macromolecular chains, resulting in a reduction in the viscosity of the system.
The attapulgite is a porous chain lamellar water-containing magnesium aluminum silicate-rich clay mineral, can be quickly swelled when meeting water or other polar solutions to form a stable suspension with certain rheological property, and has certain electrolyte resistance.
In the synthesis process of the thickening agent, a proper amount of cross-linking agent is added to endow the thickening agent with a light cross-linking structure, so that even if the thickening agent absorbs water and swells, relative slippage among polymer chain segments can not be generated, and the stability of thickening capacity is ensured. The commonly used cross-linking agent mainly comprises bifunctional short-chain compounds such as diallyl phthalate, N' -methylene-bis-propionamide and the like. Researches show that a hydrophobic long chain is introduced on a polymer macromolecular chain, and the hydrophobic association of hydrophobic groups can form a space grid structure which is slightly influenced by electrolyte, so that the electrolyte resistance of the thickener is improved. However, the selection of a crosslinking agent with a long hydrophobic chain for the synthesis of polyacrylic acid thickeners has been recently reported.
Disclosure of Invention
In order to solve the defects of the prior art, the invention takes vinyl silane coupling agent modified attapulgite as a cross-linking agent, then N, N-diallyl oleamide (with the structure shown in the specification) is added as a hydrophobic monomer and the cross-linking agent in the process of preparing the polyacrylic acid thickening agent by inverse emulsion polymerization, and long-chain hydrophobic groups can be associated to form a space network structure, so that the salt resistance of the thickening agent is improved; meanwhile, in the polymerization process, a small amount of hydrophilic monomer is added, so that the hydrophilicity of the polymer is improved, and the thickening performance and electrolyte resistance of the polymer are improved.
The invention provides a preparation method of a salt-tolerant attapulgite composite thickener, which comprises the following steps:
(1) putting attapulgite in 1mol/L hydrochloric acid solution, performing ultrasonic treatment at 70-80 deg.C for 30-60min, washing with water to neutrality, centrifuging, drying, grinding, and sieving with 400 mesh sieve;
(2) taking 10g of attapulgite treated in the step (1), adding 25-50mL of a silane coupling agent aqueous solution with the mass concentration of 5% -10%, adjusting the pH to 3-4 by using hydrochloric acid, stirring at normal temperature for 24-48h, washing for 3-5 times by using deionized water, centrifugally separating, drying, grinding and sieving by using a 400-mesh sieve to obtain silane coupling agent modified attapulgite;
(3) uniformly mixing acrylic acid, acrylamide and a hydrophilic monomer, wherein the mass of the acrylamide accounts for 20-40% of that of the acrylic monomer; adjusting pH to 6-7 with ammonia water to obtain aqueous solution;
(4) adding emulsifier span80, cross-linking agent, aviation kerosene and silane coupling agent modified attapulgite into a four-neck flask provided with a stirrer, a thermometer and a dropping funnel to prepare an oil phase, slowly adding a water phase solution into the oil phase under the stirring condition, and emulsifying at a high speed of 1500 rpm for 60-90min by 1000-fold stirring; then under the condition of stirring at the speed of 300-450 r/min, an initiator aqueous solution is dripped to initiate polymerization at the temperature of 65-70 ℃, after reaction for 1-2h, the mixture is cooled and discharged, and then a phase transfer agent TX-10 is added to be uniformly stirred to obtain a finished product.
The silane coupling agent in the step (2) is vinyltriethoxysilane, vinyltrimethoxysilane or vinyltris (β -methoxyethoxy) silane.
The hydrophilic monomer in the step (3) is 2-hydroxy-3-allyloxy sodium propanesulfonate, and accounts for 5-10% of the mass of the acrylic monomer.
In the step (4), the cross-linking agent is N, N-diallyl oleamide, and the dosage of the cross-linking agent accounts for 1.0-2.0% of the mass of the acrylic acid monomer.
In the step (4), the silane coupling agent modified attapulgite accounts for 0.4-0.8% of the mass of the acrylic monomer; the using amount of span80 accounts for 4-6% of the mass of the acrylic monomer; the aviation kerosene accounts for 20-30% of the mass of the acrylic acid monomer.
The initiator in the step (4) is ammonium persulfate, and the mass of the initiator accounts for 0.5-1.0% of that of the acrylic monomer. The invention has the beneficial effects that:
(1) n, N-diallyl oleamide with a hydrophobic long chain is selected as a cross-linking agent, so that the stability of the thickening agent is improved, and the electrolyte resistance of the thickening agent is improved.
(2) Hydrophilic monomer 2-hydroxy-3-allyloxy sodium propanesulfonate is introduced to a polymer macromolecular chain, so that the hydrophilicity of the thickening agent is improved, and the electrolyte resistance of the thickening agent is further improved.
Detailed Description
The present invention will be described in further detail with reference to specific examples. It will be understood that these examples are intended to illustrate the invention and are not intended to limit the scope of the invention in any way.
Example 1
(1) Putting attapulgite in 1mol/L hydrochloric acid solution, performing ultrasonic treatment at 80 deg.C for 30min, washing with water to neutrality, centrifuging, drying, grinding, and sieving with 400 mesh sieve;
(2) taking 10g of attapulgite treated in the step (1), adding 50mL of a 10% vinyl triethoxysilane aqueous solution, adjusting the pH to 4 with hydrochloric acid, stirring at normal temperature for 48h, washing with deionized water for 5 times, centrifugally separating, drying, grinding, and sieving with a 400-mesh sieve to obtain silane coupling agent modified attapulgite;
(3) uniformly mixing acrylic acid, acrylamide and hydrophilic monomer 2-hydroxy-3-allyloxy propane sodium sulfonate, wherein the mass of the acrylamide accounts for 40% of that of the acrylic acid monomer; the hydrophilic monomer accounts for 10 percent of the mass of the acrylic monomer; adjusting the pH value to 7 by ammonia water to prepare an aqueous phase solution;
(4) adding emulsifier span80, cross-linking agent N, N-diallyl oleamide, aviation kerosene and silane coupling agent modified attapulgite into a four-neck flask provided with a stirrer, a thermometer and a dropping funnel to prepare an oil phase, wherein the silane coupling agent modified attapulgite accounts for 0.8 percent of the mass of the acrylic monomer; the amount of span80 is 6% of the mass of acrylic monomer; aviation kerosene accounts for 30% of the mass of the acrylic monomer; the dosage of the cross-linking agent accounts for 2.0 percent of the mass of the acrylic monomer; slowly adding the water phase solution into the oil phase under stirring, and emulsifying at 1500 rpm for 60 min; then under the condition of stirring at 450 r/min, dropping initiator ammonium persulfate aqueous solution, wherein the mass of the initiator accounts for 1.0% of that of the acrylic monomer; initiating polymerization at 70 ℃, reacting for 1h, cooling and discharging, then adding a phase transfer agent TX-10, and stirring uniformly to obtain a finished product.
Comparative example 1-1 (crosslinking agent N, N-methylenebisacrylamide)
(1) Putting attapulgite in 1mol/L hydrochloric acid solution, performing ultrasonic treatment at 80 deg.C for 30min, washing with water to neutrality, centrifuging, drying, grinding, and sieving with 400 mesh sieve;
(2) taking 10g of attapulgite treated in the step (1), adding 50mL of a 10% vinyl triethoxysilane aqueous solution, adjusting the pH to 4 with hydrochloric acid, stirring at normal temperature for 48h, washing with deionized water for 5 times, centrifugally separating, drying, grinding, and sieving with a 400-mesh sieve to obtain silane coupling agent modified attapulgite;
(3) uniformly mixing acrylic acid, acrylamide and hydrophilic monomer 2-hydroxy-3-allyloxy propane sodium sulfonate, wherein the mass of the acrylamide accounts for 40% of that of the acrylic acid monomer; the hydrophilic monomer accounts for 10 percent of the mass of the acrylic monomer; adjusting the pH value to 7 by ammonia water to prepare an aqueous phase solution;
(4) adding emulsifier span80, cross-linking agent N, N-methylene bisacrylamide, aviation kerosene and silane coupling agent modified attapulgite into a four-neck flask provided with a stirrer, a thermometer and a dropping funnel to prepare an oil phase, wherein the silane coupling agent modified attapulgite accounts for 0.8 percent of the mass of acrylic monomers; the amount of span80 is 6% of the mass of acrylic monomer; aviation kerosene accounts for 30% of the mass of the acrylic monomer; the dosage of the cross-linking agent accounts for 2.0 percent of the mass of the acrylic monomer; slowly adding the water phase solution into the oil phase under stirring, and emulsifying at 1500 rpm for 60 min; then under the condition of stirring at 450 r/min, dropping initiator ammonium persulfate aqueous solution, wherein the mass of the initiator accounts for 1.0% of that of the acrylic monomer; initiating polymerization at 70 ℃, reacting for 1h, cooling and discharging, then adding a phase transfer agent TX-10, and stirring uniformly to obtain a finished product.
Comparative examples 1 to 2 (modified attapulgite without addition of silane coupling agent)
(1) Uniformly mixing acrylic acid, acrylamide and hydrophilic monomer 2-hydroxy-3-allyloxy propane sodium sulfonate, wherein the mass of the acrylamide accounts for 40% of that of the acrylic acid monomer; the hydrophilic monomer accounts for 10 percent of the mass of the acrylic monomer; adjusting the pH value to 7 by ammonia water to prepare an aqueous phase solution;
(2) adding emulsifier span80, cross-linking agent N, N-diallyl oleamide and aviation kerosene into a four-neck flask provided with a stirrer, a thermometer and a dropping funnel to prepare an oil phase, wherein the using amount of span80 accounts for 6% of the mass of acrylic monomers; aviation kerosene accounts for 30% of the mass of the acrylic monomer; the dosage of the cross-linking agent accounts for 2.0 percent of the mass of the acrylic monomer; slowly adding the water phase solution into the oil phase under stirring, and emulsifying at 1500 rpm for 60 min; then under the condition of stirring at 450 r/min, dropping initiator ammonium persulfate aqueous solution, wherein the mass of the initiator accounts for 1.0% of that of the acrylic monomer; initiating polymerization at 70 ℃, reacting for 1h, cooling and discharging, then adding a phase transfer agent TX-10, and stirring uniformly to obtain a finished product.
Comparative examples 1 to 3 (without addition of hydrophilic monomer)
(1) Putting attapulgite in 1mol/L hydrochloric acid solution, performing ultrasonic treatment at 80 deg.C for 30min, washing with water to neutrality, centrifuging, drying, grinding, and sieving with 400 mesh sieve;
(2) taking 10g of attapulgite treated in the step (1), adding 50mL of a 10% vinyl triethoxysilane aqueous solution, adjusting the pH to 4 with hydrochloric acid, stirring at normal temperature for 48h, washing with deionized water for 5 times, centrifugally separating, drying, grinding, and sieving with a 400-mesh sieve to obtain silane coupling agent modified attapulgite;
(3) uniformly mixing acrylic acid and acrylamide, wherein the mass of the acrylamide accounts for 40% of that of an acrylic acid monomer; adjusting the pH value to 7 by ammonia water to prepare an aqueous phase solution;
(4) adding emulsifier span80, cross-linking agent N, N-diallyl oleamide, aviation kerosene and silane coupling agent modified attapulgite into a four-neck flask provided with a stirrer, a thermometer and a dropping funnel to prepare an oil phase, wherein the silane coupling agent modified attapulgite accounts for 0.8 percent of the mass of the acrylic monomer; the amount of span80 is 6% of the mass of acrylic monomer; aviation kerosene accounts for 30% of the mass of the acrylic monomer; the dosage of the cross-linking agent accounts for 2.0 percent of the mass of the acrylic monomer; slowly adding the water phase solution into the oil phase under stirring, and emulsifying at 1500 rpm for 60 min; then under the condition of stirring at 450 r/min, dropping initiator ammonium persulfate aqueous solution, wherein the mass of the initiator accounts for 1.0% of that of the acrylic monomer; initiating polymerization at 70 ℃, reacting for 1h, cooling and discharging, then adding a phase transfer agent TX-10, and stirring uniformly to obtain a finished product.
Example 2
(1) Putting attapulgite in 1mol/L hydrochloric acid solution, performing ultrasonic treatment at 70 deg.C for 60min, washing with water to neutrality, centrifuging, drying, grinding, and sieving with 400 mesh sieve;
(2) taking 10g of attapulgite treated in the step (1), adding 25mL of vinyl trimethoxy silane water solution with the mass concentration of 5%, regulating the pH value to 3 by using hydrochloric acid, stirring at normal temperature for 24h, then washing with deionized water for 3 times, centrifugally separating, drying, grinding and sieving with a 400-mesh sieve to obtain silane coupling agent modified attapulgite;
(3) uniformly mixing acrylic acid, acrylamide and hydrophilic monomer 2-hydroxy-3-allyloxy propane sodium sulfonate, wherein the mass of the acrylamide accounts for 20% of that of the acrylic acid monomer; the hydrophilic monomer accounts for 5 percent of the mass of the acrylic monomer; adjusting the pH value to 6 by ammonia water to prepare an aqueous phase solution;
(4) adding emulsifier span80, cross-linking agent N, N-diallyl oleamide, aviation kerosene and silane coupling agent modified attapulgite into a four-neck flask provided with a stirrer, a thermometer and a dropping funnel to prepare an oil phase, wherein the silane coupling agent modified attapulgite accounts for 0.4 percent of the mass of the acrylic monomer; the amount of span80 is 4% of the mass of acrylic monomer; aviation kerosene accounts for 20% of the mass of the acrylic monomer; the dosage of the cross-linking agent accounts for 1.0 percent of the mass of the acrylic monomer; slowly adding the water phase solution into the oil phase under stirring, and emulsifying at a high speed of 1000 rpm for 90 min; then under the condition of stirring at 300 r/min, dropping initiator ammonium persulfate aqueous solution, wherein the mass of the initiator accounts for 0.5 percent of that of the acrylic monomer; initiating polymerization at 65 ℃, reacting for 2h, cooling and discharging, adding a phase transfer agent TX-10, and uniformly stirring to obtain a finished product.
Example 3
(1) Putting attapulgite in 1mol/L hydrochloric acid solution, performing ultrasonic treatment at 75 deg.C for 45min, washing with water to neutrality, centrifuging, drying, grinding, and sieving with 400 mesh sieve;
(2) taking 10g of attapulgite treated in the step (1), adding 30mL of 8 mass percent vinyl tris (β -methoxyethoxy) silane aqueous solution, adjusting the pH to 3.5 with hydrochloric acid, stirring at normal temperature for 36h, washing with deionized water for 4 times, centrifugally separating, drying, grinding and sieving with a 400-mesh sieve to obtain silane coupling agent modified attapulgite;
(3) uniformly mixing acrylic acid, acrylamide and hydrophilic monomer 2-hydroxy-3-allyloxy propane sodium sulfonate, wherein the mass of the acrylamide accounts for 30% of that of the acrylic acid monomer; the hydrophilic monomer accounts for 8 percent of the mass of the acrylic monomer; adjusting pH to 6.5 with ammonia water to obtain aqueous solution;
(4) adding emulsifier span80, cross-linking agent N, N-diallyl oleamide, aviation kerosene and silane coupling agent modified attapulgite into a four-neck flask provided with a stirrer, a thermometer and a dropping funnel to prepare an oil phase, wherein the silane coupling agent modified attapulgite accounts for 0.6 percent of the mass of the acrylic monomer; the amount of span80 is 5% of the mass of acrylic monomer; aviation kerosene accounts for 25% of the mass of the acrylic monomer; the dosage of the cross-linking agent accounts for 1.5 percent of the mass of the acrylic monomer; slowly adding the water phase solution into the oil phase under the stirring condition, and emulsifying at a high speed of 1200 rpm for 70 min; then, under the condition of stirring at 350 r/min, dropwise adding an initiator ammonium persulfate aqueous solution, wherein the mass of the initiator accounts for 0.8 percent of that of the acrylic monomer; initiating polymerization at 68 ℃, reacting for 1.5h, cooling and discharging, adding a phase transfer agent TX-10, and uniformly stirring to obtain a finished product.
Example 4
(1) Putting attapulgite in 1mol/L hydrochloric acid solution, performing ultrasonic treatment at 78 deg.C for 40min, washing with water to neutrality, centrifuging, drying, grinding, and sieving with 400 mesh sieve;
(2) taking 10g of attapulgite treated in the step (1), adding 40mL of vinyl triethoxysilane aqueous solution with mass concentration of 6%, adjusting pH to 3 with hydrochloric acid, stirring at normal temperature for 28h, washing with deionized water for 5 times, centrifuging, drying, grinding, and sieving with a 400-mesh sieve to obtain silane coupling agent modified attapulgite;
(3) uniformly mixing acrylic acid, acrylamide and hydrophilic monomer 2-hydroxy-3-allyloxy propane sodium sulfonate, wherein the mass of the acrylamide accounts for 25% of that of the acrylic acid monomer; the hydrophilic monomer accounts for 7 percent of the mass of the acrylic monomer; adjusting the pH value to 6 by ammonia water to prepare an aqueous phase solution;
(4) adding emulsifier span80, cross-linking agent N, N-diallyl oleamide, aviation kerosene and silane coupling agent modified attapulgite into a four-neck flask provided with a stirrer, a thermometer and a dropping funnel to prepare an oil phase, wherein the silane coupling agent modified attapulgite accounts for 0.5 percent of the mass of the acrylic monomer; the amount of span80 is 4.5% of the mass of acrylic monomer; aviation kerosene accounts for 22% of the mass of the acrylic monomer; the dosage of the cross-linking agent accounts for 1.8 percent of the mass of the acrylic monomer; slowly adding the water phase solution into the oil phase under stirring, and emulsifying at a high speed of 1300 rpm for 80 min; then under the condition of stirring at 400 r/min, dropwise adding an initiator ammonium persulfate aqueous solution, wherein the mass of the initiator accounts for 0.7 percent of that of the acrylic monomer; initiating polymerization at 67 ℃, reacting for 1.2h, cooling and discharging, adding a phase transfer agent TX-10, and uniformly stirring to obtain a finished product.
Example 5
Accurately weighing 2g of thickening agent, adding 98g of distilled water, stirring, dropwise adding 3-4 drops of ammonia water, and fully stirring to prepare white slurry with the mass fraction of 2%. The viscosity of the white slurry was measured at room temperature using a Brookfield DV-II + Pro viscometer at a constant speed of 10 rpm (spindle 6).
The electrolyte resistance was measured as the viscosity retention of 0.05% NaCl (solids) added to the thickener white slurry, which was ηAfter adding NaCl/ηBefore adding NaClThe higher the viscosity retention, the better the electrolyte resistance.
TABLE 1 thickening Properties of the samples
As can be seen from the data in Table 1, the samples obtained in examples 1-4 have excellent thickening performance and electrolyte resistance; compared with the example 1, the comparative example 1-1 has obviously reduced electrolyte resistance of the obtained product because the used cross-linking agent does not contain hydrophobic long chains; comparative examples 1 to 3, in which no hydrophilic monomer was added during polymerization, the resulting products had inferior thickening properties and electrolyte resistance to those of example 1.
Claims (4)
1. A preparation method of a salt-tolerant attapulgite composite thickener is characterized by comprising the following steps: the method comprises the following steps:
(1) putting attapulgite in 1mol/L hydrochloric acid solution, performing ultrasonic treatment at 70-80 deg.C for 30-60min, washing with water to neutrality, centrifuging, drying, grinding, and sieving with 400 mesh sieve;
(2) taking 10g of attapulgite treated in the step (1), adding 25-50mL of a silane coupling agent aqueous solution with the mass concentration of 5% -10%, adjusting the pH to 3-4 by using hydrochloric acid, stirring at normal temperature for 24-48h, washing for 3-5 times by using deionized water, centrifugally separating, drying, grinding and sieving by using a 400-mesh sieve to obtain silane coupling agent modified attapulgite;
(3) uniformly mixing acrylic acid, acrylamide and 2-hydroxy-3-allyloxy propane sodium sulfonate, wherein the mass of the acrylamide accounts for 20-40% of that of the acrylic acid monomer, and the mass of the 2-hydroxy-3-allyloxy propane sodium sulfonate accounts for 5-10% of that of the acrylic acid monomer; adjusting pH to 6-7 with ammonia water to obtain aqueous solution;
(4) adding emulsifier span80, cross-linking agent N, N-diallyl oleamide, aviation kerosene and silane coupling agent modified attapulgite into a four-neck flask provided with a stirrer, a thermometer and a dropping funnel to prepare an oil phase, wherein the N, N-diallyl oleamide accounts for 1.0-2.0% of the mass of the acrylic monomer, and the silane coupling agent modified attapulgite accounts for 0.4-0.8% of the mass of the acrylic monomer; slowly adding the water phase solution into the oil phase under the stirring condition, and emulsifying at the high speed of 1500 rpm for 60-90min at 1000-; then under the condition of stirring at the speed of 300-450 r/min, an initiator aqueous solution is dripped to initiate polymerization at the temperature of 65-70 ℃, after reaction for 1-2h, the mixture is cooled and discharged, and then a phase transfer agent TX-10 is added to be uniformly stirred to obtain a finished product.
2. The method for preparing the salt-tolerant attapulgite composite thickener according to claim 1, wherein the silane coupling agent in the step (2) is vinyltriethoxysilane, vinyltrimethoxysilane or vinyltris (β -methoxyethoxy) silane.
3. The preparation method of the salt-tolerant attapulgite composite thickener according to claim 1, which is characterized in that: in the step (4), the dosage of the span80 accounts for 4-6% of the mass of the acrylic monomer; the aviation kerosene accounts for 20-30% of the mass of the acrylic acid monomer.
4. The preparation method of the salt-tolerant attapulgite composite thickener according to claim 1, which is characterized in that: the initiator in the step (4) is ammonium persulfate, and the mass of the initiator accounts for 0.5-1.0% of that of the acrylic monomer.
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| CN110663935A (en) * | 2019-11-14 | 2020-01-10 | 陈淑英 | Preparation method of salt-resistant stable thickening agent material |
| CN110885396B (en) * | 2019-12-03 | 2020-08-04 | 江苏麦阁吸附剂有限公司 | Salt-tolerant attapulgite/polyacrylic acid composite thickening agent and preparation method thereof |
| CN111303344B (en) * | 2020-03-03 | 2022-08-30 | 常州大学 | Preparation method of modified sodium alginate/polyacrylic acid composite thickening agent |
| CN113372750A (en) * | 2021-05-11 | 2021-09-10 | 安徽万博材料科技有限公司 | Water-based multicolor paint based on lithium-based attapulgite and preparation method thereof |
| CN115417945B (en) * | 2022-09-16 | 2023-07-25 | 常州大学 | Method for preparing polyacrylic acid/attapulgite clay composite thickener with assistance of ultrasound |
| CN115748268B (en) * | 2022-12-06 | 2024-03-15 | 常州大学 | Attapulgite composite cationic thickener and preparation method thereof |
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