CN112521050A - Concrete foaming agent and preparation method thereof - Google Patents
Concrete foaming agent and preparation method thereof Download PDFInfo
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- CN112521050A CN112521050A CN202011232424.2A CN202011232424A CN112521050A CN 112521050 A CN112521050 A CN 112521050A CN 202011232424 A CN202011232424 A CN 202011232424A CN 112521050 A CN112521050 A CN 112521050A
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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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
- C04B40/0046—Premixtures of ingredients characterised by their processing, e.g. sequence of mixing the ingredients when preparing the premixtures
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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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/42—Pore formers
Abstract
The invention relates to the technical field of building materials, in particular to a concrete foaming agent and a preparation method thereof. The invention discloses a concrete foaming agent and a preparation method thereof, wherein the concrete foaming agent comprises the following components in parts by weight: 10-35 parts of sodium lauryl polyoxyethylene ether sulfate, 5-15 parts of alkyl sulfate, 2-8 parts of a vegetable protein foaming agent, 4-8 parts of cocamidopropyl betaine, 10-30 parts of a foam stabilizer, 5-15 parts of an auxiliary agent, 5-15 parts of organic hollow microspheres and 100 parts of water. According to the invention, the vegetable protein foaming agent is added, so that the foaming volume is increased, and the foaming efficiency is improved. The addition of the organic hollow microspheres can improve the pore structure of the foaming agent, improve the stability of foaming agent foam and reduce water absorption to a certain extent. The invention also provides a preparation method of the concrete foaming agent, which improves the foaming efficiency and the stability of the foaming agent foam.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a concrete foaming agent and a preparation method thereof.
Background
In recent years, along with the development of national economy, the urbanization process of China is remarkably improved, the rapid development of urbanization promotes the rapid development of the building industry, and concrete is used as an important material of the building industry and has the characteristics of rich raw materials, low price, simple production process, high compressive strength, good durability and the like, so that the consumption of the concrete is increased more and more. However, ordinary concrete has high requirements for raw materials and also risks introducing harmful impurities. The foam concrete has the advantages of good heat insulation performance, light weight, good sound insulation and fire resistance, and the like, so the research and development of the foam concrete are very important at home and abroad, and the application of the foam concrete in the field of buildings is more and more extensive.
The foamed concrete is usually a porous material prepared by mechanically preparing foam from a foaming agent aqueous solution, adding the foam into slurry consisting of siliceous materials, calcareous materials, water, various additives and the like, mixing, stirring, casting, molding and curing. The development of the foaming agent for the foam concrete in China goes through three stages, namely a first stage, in the early 50 th century, rosin soap and rosin thermopolymer are successfully applied to the production and application of the foam concrete in China, but the foam stability and the foaming times of the rosin resin foaming agent are common; in the second stage, in the last 80 th century, surfactant foaming agents were successfully developed and widely used in foam concrete production, and the surfactant foaming agents have strong foaming capacity but poor foam stability; in the third stage, at the end of the last century, China enters the research and development application stage of protein foaming agents, and the protein foaming agents are good in stability but not high in foaming times. The concrete foaming agent has higher requirements on the size and the structure of the foam, but the foam of the existing stage concrete foaming agent has the defects of easy cracking and unstable structure.
Disclosure of Invention
The embodiment of the application solves the problems of poor stability and qualitative performance, low foaming efficiency, small foaming amount and the like of the foaming agent in the prior art by providing the concrete foaming agent and the preparation method thereof, and the foaming agent is used for preparing the foam concrete to obtain the foam concrete with excellent performance.
The embodiment of the application provides a concrete foaming agent which comprises the following components in parts by weight: 10-35 parts of lauryl alcohol polyoxyethylene ether sodium sulfate, 5-15 parts of alkyl sulfate, 2-8 parts of vegetable protein, 4-8 parts of cocamidopropyl betaine, 10-30 parts of a foam stabilizer, 5-15 parts of an auxiliary agent, 5-15 parts of organic hollow microspheres and 100 parts of water. The alkyl sulfate includes sodium dodecyl sulfate, sodium 7-ethyl-2-methyl-undecane-4-yl sulfate, and sodium 2-ethyl-3-hydroxyhexyl sulfate.
In a preferred embodiment, the weight ratio of sodium lauryl sulfate to the mixture of sodium 7-ethyl-2-methyl-undecan-4-yl sulfate and sodium 2-ethyl-3-hydroxyhexyl sulfate is from 1 to 1.5: 2.
in a preferred embodiment, the weight ratio of sodium 7-ethyl-2-methyl-undecan-4-yl sulfate to sodium 2-ethyl-3-hydroxyhexyl sulfate is 1: 1-3.
In a preferred embodiment, the plant protein is at least one selected from the group consisting of soybean meal, cottonseed meal, peanut meal and rapeseed meal.
In a preferred embodiment, the weight ratio of the sodium dodecyl sulfate to the soybean meal is 2: 1.
in a preferred embodiment, the foam stabilizer comprises at least one of coconut oil fatty acid diethanolamide, silicone polyether emulsion, hydroxyethyl cellulose ether and gelatin.
In a preferred embodiment, the foam stabilizer further comprises a polyvinyl acetate emulsion and an acrylate copolymer emulsion, and the weight ratio of the polyvinyl acetate emulsion to the acrylate copolymer emulsion is 1: 1-3.
In a preferred embodiment, the auxiliary agent is at least one selected from triethanolamine, diethanol monoisopropanolamine, sodium chloride and potassium chloride.
In a preferred embodiment, the organic hollow microspheres are poly (styrene-divinylbenzene) hollow microspheres and/or polystyrene microspheres, and the weight ratio of the poly (styrene-divinylbenzene) hollow microspheres to the polystyrene microspheres is 1: 1.
the invention also provides a preparation method of the concrete foaming agent, which comprises the following steps:
(1) mixing lauryl alcohol polyoxyethylene ether sodium sulfate, alkyl sulfate, 50% vegetable protein in parts by weight, cocamidopropyl betaine and water in parts by weight to obtain a mixture 1;
(2) placing the mixture 1 in a water bath at 40-50 ℃ for heating and stirring, wherein the stirring speed is 500rpm, and the stirring time is 10 min;
(3) adding 50% of vegetable protein, foam stabilizer, auxiliary agent and organic hollow microspheres in parts by weight in the stirring process, and stirring for 10-30min to obtain a mixture 2;
(4) cooling the mixture 2 to room temperature.
Compared with the prior art, the invention has at least the following beneficial effects: the foaming stabilizer used in the existing foaming agent mostly adopts cellulose, starch and other foaming stabilizers, and the composite form of cellulose ether, polyvinyl acetate emulsion and acrylate copolymer emulsion is adopted in the application, so that the possibility of generating flocculent substances can be reduced, and the stability of the foaming agent is improved; the alkyl sulfate is compounded by sodium dodecyl sulfate, 7-ethyl-2-methyl-undecane-4-yl sodium sulfate and 2-ethyl-3-hydroxyhexyl sodium sulfate, so that the van der Waals force of the sodium dodecyl sulfate can be reduced, and the stability of the foaming agent is improved; the foaming agent adopts the composition of alkyl sulfate and vegetable protein, so that the foaming volume and the foaming amount can be improved; by adding the organic hollow microspheres, the structure of the holes can be adjusted, and the stability of the holes is improved.
Detailed Description
The application provides a concrete foaming agent which comprises the following components in parts by weight: 10-35 parts of lauryl alcohol polyoxyethylene ether sodium sulfate, 5-15 parts of alkyl sulfate, 2-8 parts of vegetable protein, 4-8 parts of cocamidopropyl betaine, 10-30 parts of a foam stabilizer, 5-15 parts of an auxiliary agent, 5-15 parts of organic hollow microspheres and 100 parts of water. The alkyl sulfate includes sodium dodecyl sulfate, sodium 7-ethyl-2-methyl-undecane-4-yl sulfate, and sodium 2-ethyl-3-hydroxyhexyl sulfate.
In a preferred embodiment, the weight ratio of sodium lauryl sulfate to the mixture of sodium 7-ethyl-2-methyl-undecan-4-yl sulfate and sodium 2-ethyl-3-hydroxyhexyl sulfate is from 1 to 1.5: 2.
the weight ratio of sodium lauryl sulfate to the mixture of sodium 7-ethyl-2-methyl-undecan-4-yl sulfate and sodium 2-ethyl-3-hydroxyhexyl sulfate in this application is 1-1.5: 2 "means that the ratio of the weight of sodium lauryl sulfate to the weight of the mixture of sodium 7-ethyl-2-methyl-undecan-4-yl sulfate, sodium 2-ethyl-3-hydroxyhexyl sulfate is 1: 2.
in a preferred embodiment, the weight ratio of sodium 7-ethyl-2-methyl-undecan-4-yl sulfate to sodium 2-ethyl-3-hydroxyhexyl sulfate is 1: 1-3.
The sodium dodecyl sulfate, the sodium 7-ethyl-2-methyl-undecane-4-yl sulfate and the sodium 2-ethyl-3-hydroxyhexyl sulfate can improve the foaming efficiency of the foaming agent. The reason is presumed to be: the 7-ethyl-2-methyl-undecane-4-yl sodium sulfate and the 2-ethyl-3-hydroxyhexyl sodium sulfate have ethyl groups, and after being combined with the lauryl sodium sulfate, the intermolecular force of the polyvinyl acetate emulsion and the acrylate copolymer emulsion can be enhanced, and the surface tension can be reduced, so that the foaming times can be improved, the foaming time can be shortened, and the foaming efficiency can be further improved.
In a preferred embodiment, the plant protein is at least one selected from the group consisting of soybean meal, cottonseed meal, peanut meal and rapeseed meal.
The vegetable protein is soybean meal which is rich in resources, low in cost, strong in foaming capacity, non-toxic and environment-friendly. The soybean meal is selected from one-step soybean meal soaking, a byproduct obtained after extracting the soybean oil by a leaching method is the one-step soybean meal soaking, the production process of the one-step soybean meal soaking is advanced, the protein content is high, and the one-step soybean meal soaking is a main variety circulating in the spot market in China.
In a preferred embodiment, the weight ratio of the sodium dodecyl sulfate to the soybean meal is 2: 1.
the applicant found that the weight ratio of sodium lauryl sulfate to soybean meal was 2: 1, the composite material can improve intermolecular force, increase the foaming volume and increase the stability of bubbles. The possible reason is that the lauryl sodium sulfate is easy to dissolve in water, can reduce the surface tension of liquid, has strong foaming performance, but has poor foam stability, a certain weight part of bean pulp is added into the lauryl sodium sulfate, the lauryl sodium sulfate contains sodium sulfate and alkyl, the main components of the vegetable protein bean pulp are protein, lysine, tryptophan, methionine and the like, and the bean pulp, alkyl sulfate, microspheres and the like are cooperated with each other, so that the intermolecular force is improved, the foaming volume is increased, and the stability of bubbles is increased.
In a preferred embodiment, the foam stabilizer comprises at least one of coconut oil fatty acid diethanolamide, silicone polyether emulsion, hydroxyethyl cellulose ether and gelatin.
In a preferred embodiment, the foam stabilizer further comprises a polyvinyl acetate emulsion and an acrylate copolymer emulsion, and the weight ratio of the polyvinyl acetate emulsion to the acrylate copolymer emulsion is 1: 1-3.
The stability of the foaming agent can be improved by adding the polyvinyl acetate emulsion and the acrylate copolymer emulsion. The reason is probably that the polyvinyl acetate emulsion and the acrylic ester copolymer emulsion can increase the solubility of the cellulose ether, reduce the generation of flocculent substances and improve the stability of the foaming agent.
In a preferred embodiment, the auxiliary agent is at least one selected from triethanolamine, diethanol monoisopropanolamine, sodium chloride and potassium chloride.
In a preferred embodiment, the organic hollow microspheres are poly (styrene-divinylbenzene) hollow microspheres and/or polystyrene microspheres, and the weight ratio of the poly (styrene-divinylbenzene) hollow microspheres to the polystyrene microspheres is 1: 1.
the preparation method of the poly (styrene-divinylbenzene) hollow microsphere comprises the following steps: washing styrene with 10% NaOH solution for three times, and washing with pure water for several times until the styrene is neutral; treating divinylbenzene by the same method; dissolving 10g of sodium chloride and 15g of hydroxyethyl cellulose in 30mL of distilled water, and magnetically stirring until the sodium chloride and the hydroxyethyl cellulose are uniformly mixed to prepare a solution 1; preparing 20mL of toluene and 10mL of cyclohexanol into a mixed solution, adding 4g of styrene, 6g of divinylbenzene and 0.5g of azobisisobutyronitrile into the mixed solution of toluene and cyclohexanol, and magnetically stirring until the mixture is uniform to prepare a solution 2; fourthly, mixing the solution 1 and the solution 2 according to a volume ratio of 3: 1, mixing, and dispersing for 20min by using ultrasonic waves to obtain a mixed solution 3; fifthly, transferring the mixed solution 3 into a reactor, stirring at 100r/min, polymerizing for 24h at 70 ℃, after the reaction is finished, filtering the product, washing for 3 times by using distilled water, and drying for 15h in vacuum to obtain the poly (styrene-divinylbenzene) hollow microspheres. Azobisisobutyronitrile was purchased from Shanghai Shanpu chemical Co., Ltd, styrene was purchased from Jiangsu Sanmu group chemical plant, divinylbenzene was purchased from Shanghai Zhongzhong Fine chemical Co., Ltd, hydroxyethylcellulose was purchased from Shantou Guanghua chemical plant, and toluene was purchased from Guangzhou chemical reagent plant.
The preparation method of the polystyrene microsphere comprises the following steps: weighing 10g of polyvinylpyrrolidone (average molecular weight 8000) and dissolving in a mixed solution prepared by 50mL of absolute ethyl alcohol and 50mL of water, heating the solution to 70 ℃, adding 50g of styrene and 10g of azobisisobutyronitrile, keeping the stirring speed at 150r/min and the reaction temperature at 70 ℃ for polymerization reaction for 10h to obtain a dispersed polymer, carrying out suction filtration on the dispersed polymer, washing with absolute ethyl alcohol and distilled water for 5 times, and finally carrying out vacuum drying at 50 ℃ for 24h to obtain the polystyrene microsphere. Azobisisobutyronitrile was purchased from Shanghai Shanpu chemical Co., Ltd, polyvinylpyrrolidone was purchased from Tianjin New Fine chemical development center, and styrene was purchased from Jiangsu Sanmu group chemical plant.
The applicant finds that the organic hollow microspheres are poly (styrene-divinylbenzene) hollow microspheres and/or polystyrene microspheres, and the weight ratio of the poly (styrene-divinylbenzene) hollow microspheres to the polystyrene microspheres is 1: 1. the structure of the hole can be regulated and controlled by adding the hollow microspheres, so that the deformation and the breakage of the hole are prevented. The possible reasons are: the hollow microspheres are in a stable pore structure, and poly (styrene-divinylbenzene) hollow microspheres and polystyrene microspheres with a certain pore structure and controllable pore size are added into a foaming agent, so that the lauryl sodium sulfate, the 7-ethyl-2-methyl-undecane-4-yl sodium sulfate and the 2-ethyl-3-hydroxyhexyl sodium sulfate are adsorbed on the hollow microspheres.
The application also provides a preparation method of the concrete foaming agent, which comprises the following steps:
(1) mixing lauryl alcohol polyoxyethylene ether sodium sulfate, alkyl sulfate, 50% vegetable protein in parts by weight, cocamidopropyl betaine and water in parts by weight to obtain a mixture 1;
(2) placing the mixture 1 in a water bath at 40-50 ℃ for heating and stirring, wherein the stirring speed is 500rpm, and the stirring time is 10 min;
(3) adding 50% of vegetable protein, foam stabilizer, auxiliary agent and organic hollow microspheres in parts by weight in the stirring process, and stirring for 10-30min to obtain a mixture 2;
(4) cooling the mixture 2 to room temperature.
The applicant has found that by the above preparation method, the foaming efficiency can be improved and the stability of the foam can also be improved. The possible reasons are: the temperature and the stirring can adjust the air pressure of gas in the foaming agent, the change of the air pressure can influence the foaming speed of the foaming agent, so that the foaming efficiency is influenced, in addition, the stirring and reaction time can ensure that the stabilizer reacts more fully, and the foam stability is improved.
Example 1
The concrete foaming agent comprises the following components in parts by weight: 10 parts of lauryl alcohol polyoxyethylene ether sodium sulfate, 4 parts of lauryl sodium sulfate, 2 parts of bean pulp, 4 parts of 7-ethyl-2-methyl-undecane-4-yl sodium sulfate, 4 parts of 2-ethyl-3-hydroxyhexyl sodium sulfate, 6 parts of cocamidopropyl betaine, 4 parts of triethanolamine, 4 parts of diethanol monoisopropanolamine, 2 parts of sodium chloride, 6 parts of coconut oil fatty acid diethanolamide, 4 parts of hydroxyethyl cellulose ether, 3 parts of polyvinyl acetate emulsion, 3 parts of acrylate copolymer emulsion, 2 parts of poly (styrene-divinylbenzene) hollow microspheres, 2 parts of polystyrene microspheres and 100 parts of water.
CAS number for sodium 7-ethyl-2-methyl-undec-4-yl sulfate 139-88-8, CAS number for sodium 2-ethyl-3-hydroxyhexyl sulfate 126-92-1, and CAS number for hydroxyethyl cellulose ether 9004-62-0; polyvinyl acetate emulsion was purchased from Jiangsu seven-leaf latex Co., Ltd; acrylate copolymer emulsions were purchased from beijing rui sandet building materials ltd;
the preparation method of the poly (styrene-divinylbenzene) hollow microsphere comprises the following steps: washing styrene with 10% NaOH solution for three times, and washing with pure water for several times until the styrene is neutral; divinylbenzene is treated by the same method; dissolving 10g of sodium chloride and 15g of hydroxyethyl cellulose in 30mL of distilled water, and magnetically stirring until the sodium chloride and the hydroxyethyl cellulose are uniformly mixed to prepare a solution 1; preparing 20mL of toluene and 10mL of cyclohexanol into a mixed solution, adding 4g of styrene, 6g of divinylbenzene and 0.5g of azobisisobutyronitrile into the mixed solution of toluene and cyclohexanol, and magnetically stirring until the mixture is uniform to prepare a solution 2; fourthly, mixing the solution 1 and the solution 2 according to a volume ratio of 3: 1, mixing, and dispersing for 20min by using ultrasonic waves to obtain a mixed solution 3; fifthly, transferring the mixed solution 3 into a reactor, stirring at 100r/min, polymerizing for 24h at 70 ℃, after the reaction is finished, filtering the product, washing for 3 times by using distilled water, and drying for 15h in vacuum to obtain the poly (styrene-divinylbenzene) hollow microspheres.
Azobisisobutyronitrile was purchased from Shanghai Shanpu chemical Co., Ltd, styrene was purchased from Jiangsu Sanmu group chemical plant, divinylbenzene was purchased from Shanghai Zhongzhong Fine chemical Co., Ltd, hydroxyethylcellulose was purchased from Shantou Guanghua chemical plant, and toluene was purchased from Guangzhou chemical reagent plant.
The preparation method of the polystyrene microsphere comprises the following steps: weighing 10g of polyvinylpyrrolidone (average molecular weight 8000) and dissolving in a mixed solution prepared by 50mL of absolute ethyl alcohol and 50mL of water, heating the solution to 70 ℃, adding 50g of styrene and 10g of azobisisobutyronitrile, keeping the stirring speed at 150r/min and the reaction temperature at 70 ℃ for polymerization reaction for 10h to obtain a dispersed polymer, carrying out suction filtration on the dispersed polymer, washing with absolute ethyl alcohol and distilled water for 5 times, and finally carrying out vacuum drying at 50 ℃ for 24h to obtain the polystyrene microsphere. Azobisisobutyronitrile was purchased from Shanghai Shanpu chemical Co., Ltd, polyvinylpyrrolidone was purchased from Tianjin New Fine chemical development center, and styrene was purchased from Jiangsu Sanmu group chemical plant.
The preparation method of the concrete foaming agent comprises the following steps:
(1) mixing lauryl alcohol polyoxyethylene ether sodium sulfate, alkyl sulfate, 50% vegetable protein in parts by weight, cocamidopropyl betaine and water in parts by weight to obtain a mixture 1;
(2) placing the mixture 1 in a water bath at 40-50 ℃ for heating and stirring, wherein the stirring speed is 500rpm, and the stirring time is 10 min;
(3) adding 50% by weight of vegetable protein, a foam stabilizer, an auxiliary agent and organic hollow microspheres in the stirring process, and stirring for 15min to obtain a mixture 2;
(4) cooling the mixture 2 to room temperature.
Example 2
The concrete foaming agent comprises the following components in parts by weight: 10 parts of lauryl alcohol polyoxyethylene ether sodium sulfate, 4 parts of lauryl sodium sulfate, 2 parts of bean pulp, 2 parts of 7-ethyl-2-methyl-undecane-4-yl sodium sulfate, 6 parts of 2-ethyl-3-hydroxyhexyl sodium sulfate, 6 parts of cocamidopropyl betaine, 4 parts of triethanolamine, 4 parts of diethanol monoisopropanolamine, 2 parts of sodium chloride, 6 parts of coconut oil fatty acid diethanolamide, 4 parts of hydroxyethyl cellulose ether, 3 parts of polyvinyl acetate emulsion, 3 parts of acrylate copolymer emulsion, 2 parts of poly (styrene-divinylbenzene) hollow microspheres, 2 parts of polystyrene microspheres and 100 parts of water.
The raw materials of the concrete foaming agent are prepared by the same method as in example 1, and the concrete foaming agent is prepared by the same method as in example 1.
Example 3
The concrete foaming agent comprises the following components in parts by weight: 10 parts of lauryl alcohol polyoxyethylene ether sodium sulfate, 4 parts of lauryl sodium sulfate, 2 parts of bean pulp, 4 parts of 7-ethyl-2-methyl-undecane-4-yl sodium sulfate, 4 parts of 2-ethyl-3-hydroxyhexyl sodium sulfate, 6 parts of cocamidopropyl betaine, 4 parts of triethanolamine, 4 parts of diethanol monoisopropanolamine, 2 parts of sodium chloride, 6 parts of coconut oil fatty acid diethanolamide, 4 parts of hydroxyethyl cellulose ether, 2 parts of polyvinyl acetate emulsion, 4 parts of acrylate copolymer emulsion, 2 parts of poly (styrene-divinylbenzene) hollow microspheres, 2 parts of polystyrene microspheres and 100 parts of water.
The raw materials of the concrete foaming agent are prepared by the same method as in example 1, and the concrete foaming agent is prepared by the same method as in example 1.
Comparative example 1
The concrete foaming agent comprises the following components in parts by weight: 10 parts of lauryl alcohol polyoxyethylene ether sodium sulfate, 4 parts of lauryl sodium sulfate, 2 parts of bean pulp, 6 parts of cocamidopropyl betaine, 4 parts of triethanolamine, 4 parts of diethanol monoisopropanolamine, 2 parts of sodium chloride, 6 parts of coconut oil fatty acid diethanolamide, 4 parts of hydroxyethyl cellulose ether, 3 parts of polyvinyl acetate emulsion, 3 parts of acrylate copolymer emulsion, 2 parts of poly (styrene-divinylbenzene) hollow microspheres, 2 parts of polystyrene microspheres and 100 parts of water.
The raw materials of the concrete foaming agent are prepared by the same method as in example 1, and the concrete foaming agent is prepared by the same method as in example 1.
Comparative example 2
The concrete foaming agent comprises the following components in parts by weight: 10 parts of lauryl alcohol polyoxyethylene ether sodium sulfate, 4 parts of lauryl sodium sulfate, 8 parts of 7-ethyl-2-methyl-undecane-4-sodium sulfate, 2 parts of soybean meal, 6 parts of cocamidopropyl betaine, 4 parts of triethanolamine, 4 parts of diethanol monoisopropanolamine, 2 parts of sodium chloride, 6 parts of coconut oil fatty acid diethanolamide, 4 parts of hydroxyethyl cellulose ether, 3 parts of polyvinyl acetate emulsion, 3 parts of acrylate copolymer emulsion, 2 parts of poly (styrene-divinylbenzene) hollow microspheres, 2 parts of polystyrene microspheres and 100 parts of water.
The raw materials of the concrete foaming agent are prepared by the same method as in example 1, and the concrete foaming agent is prepared by the same method as in example 1.
Comparative example 3
The concrete foaming agent comprises the following components in parts by weight: 10 parts of lauryl alcohol polyoxyethylene ether sodium sulfate, 4 parts of lauryl sodium sulfate, 8 parts of 2-ethyl-3-hydroxyhexyl sodium sulfate, 2 parts of soybean meal, 6 parts of cocamidopropyl betaine, 4 parts of triethanolamine, 4 parts of diethanol monoisopropanolamine, 2 parts of sodium chloride, 6 parts of coconut oil fatty acid diethanolamide, 4 parts of hydroxyethyl cellulose ether, 3 parts of polyvinyl acetate emulsion, 3 parts of acrylate copolymer emulsion, 2 parts of poly (styrene-divinylbenzene) hollow microspheres, 2 parts of polystyrene microspheres and 100 parts of water.
The raw materials of the concrete foaming agent are prepared by the same method as in example 1, and the concrete foaming agent is prepared by the same method as in example 1.
Comparative example 4
The concrete foaming agent comprises the following components in parts by weight: 10 parts of lauryl alcohol polyoxyethylene ether sodium sulfate, 4 parts of lauryl sodium sulfate, 2 parts of bean pulp, 4 parts of 7-ethyl-2-methyl-undecane-4-sodium sulfate, 4 parts of 2-ethyl-3-hydroxyhexyl sodium sulfate, 6 parts of cocamidopropyl betaine, 4 parts of triethanolamine, 4 parts of diethanol monoisopropanolamine, 2 parts of sodium chloride, 6 parts of coconut oil fatty acid diethanolamide, 4 parts of hydroxyethyl cellulose ether, 2 parts of poly (styrene-divinylbenzene) hollow microspheres, 2 parts of polystyrene microspheres and 100 parts of water.
The raw materials of the concrete foaming agent are prepared by the same method as in example 1, and the concrete foaming agent is prepared by the same method as in example 1.
Comparative example 5
The concrete foaming agent comprises the following components in parts by weight: 10 parts of lauryl alcohol polyoxyethylene ether sodium sulfate, 4 parts of lauryl sodium sulfate, 2 parts of soybean meal, 4 parts of 7-ethyl-2-methyl-undecane-4-yl sodium sulfate, 4 parts of 2-ethyl-3-hydroxyhexyl sodium sulfate, 6 parts of cocamidopropyl betaine, 4 parts of triethanolamine, 4 parts of diethanol monoisopropanolamine, 2 parts of sodium chloride, 6 parts of coconut oil fatty acid diethanolamide, 4 parts of hydroxyethyl cellulose ether, 3 parts of polyvinyl acetate emulsion, 3 parts of acrylate copolymer emulsion and 100 parts of water.
The raw materials of the concrete foaming agent are prepared by the same method as in example 1, and the concrete foaming agent is prepared by the same method as in example 1.
Comparative example 6
The concrete foaming agent comprises the following components in parts by weight: 10 parts of lauryl alcohol polyoxyethylene ether sodium sulfate, 4 parts of lauryl sodium sulfate, 2 parts of bean pulp, 4 parts of 7-ethyl-2-methyl-undecane-4-yl sodium sulfate, 4 parts of 2-ethyl-3-hydroxyhexyl sodium sulfate, 6 parts of cocamidopropyl betaine, 4 parts of triethanolamine, 4 parts of diethanol monoisopropanolamine, 2 parts of sodium chloride, 6 parts of coconut oil fatty acid diethanolamide, 4 parts of hydroxyethyl cellulose ether, 6 parts of polyvinyl acetate emulsion, 2 parts of poly (styrene-divinylbenzene) hollow microspheres, 2 parts of polystyrene microspheres and 100 parts of water.
The raw materials of the concrete foaming agent are prepared by the same method as in example 1, and the concrete foaming agent is prepared by the same method as in example 1.
Comparative example 7
The concrete foaming agent comprises the following components in parts by weight: 10 parts of lauryl alcohol polyoxyethylene ether sodium sulfate, 4 parts of lauryl sodium sulfate, 2 parts of bean pulp, 4 parts of 7-ethyl-2-methyl-undecane-4-sodium sulfate, 4 parts of 2-ethyl-3-hydroxyhexyl sodium sulfate, 6 parts of cocamidopropyl betaine, 4 parts of triethanolamine, 4 parts of diethanol monoisopropanolamine, 2 parts of sodium chloride, 6 parts of coconut oil fatty acid diethanolamide, 4 parts of hydroxyethyl cellulose ether, 6 parts of acrylate copolymer emulsion, 2 parts of poly (styrene-divinylbenzene) hollow microspheres, 2 parts of polystyrene microspheres and 100 parts of water.
The raw materials of the concrete foaming agent are prepared by the same method as in example 1, and the concrete foaming agent is prepared by the same method as in example 1.
Performance test method
1. Foaming volume test
100mL of the foaming agent was taken out at room temperature and placed in a vessel, and stirred in a stirrer at 9000rpm for 5 minutes, and the volume of the generated foam was measured in mL.
2. Measurement of foaming time
100mL of the foaming agent was taken out at room temperature, stirred in a stirrer at 9000rpm, and the stirring time in s required for the generated foam to have a volume of 500mL was measured.
| Volume of foam | Time of foaming | |
| Example 1 | 1000 | 142 |
| Example 2 | 960 | 125 |
| Example 3 | 980 | 138 |
| Comparative example 1 | 710 | 320 |
| Comparative example 2 | 840 | 265 |
| Comparative example 3 | 860 | 251 |
| Comparative example 4 | 950 | 150 |
| Comparative example 5 | 960 | 148 |
| Comparative example 6 | 969 | 156 |
| Comparative example 7 | 958 | 143 |
3. Test of expansion ratio
Firstly, 500mL of foaming agent is placed in a fixed container, the container is placed on a stirrer, and the stirring is carried out for 1-2 min at the rotating speed of 1300 rpm; then, 30mL of coconut oil fatty acid diethanolamide and 20g of hydroxyethyl cellulose ether were dissolved in 500mL of water and stirred until fully dissolved, and the foaming agent was placed in an aqueous solution of a foam stabilizer having a certain viscosity and stirred at 2000rpm for 2 min. Standing for 20s after stirring is stopped, taking the foam on the upper part of the stirring pot to fill a 100mL beaker, scraping the foam on the beaker, weighing, and measuring the foaming times of the foaming agent. And taking the glass plate with the coordinate paper adhered to the lower part, uniformly spreading the foam on the glass plate, placing another transparent glass plate above the foam, and collecting an image by using a high-power digital camera. Counting the number of large bubbles in the foam with a certain area, and taking the ratio of the number of the large bubbles to the total number of the large bubbles in the foam with a certain area as a foam uniformity index to measure the dimensional stability of the foam, wherein when the number of the large bubbles in the foam with a certain area is less, the more stable the size of the foam is.
It will be appreciated by those of ordinary skill in the art that the embodiments described herein are intended to assist the reader in understanding the principles of the invention and are to be construed as being without limitation to such specifically recited embodiments and examples. Those skilled in the art can make various other specific changes and combinations based on the teachings of the present invention without departing from the spirit of the invention, and these changes and combinations are within the scope of the invention.
Claims (10)
1. The concrete foaming agent is characterized by comprising the following components in parts by weight: 10-35 parts of lauryl alcohol polyoxyethylene ether sodium sulfate, 5-15 parts of alkyl sulfate, 2-8 parts of vegetable protein, 5-10 parts of cocamidopropyl betaine, 14-32 parts of a foam stabilizer, 6-18 parts of an auxiliary agent, 5-15 parts of organic hollow microspheres and 100 parts of water, wherein the alkyl sulfate comprises lauryl sodium sulfate, 7-ethyl-2-methyl-undecane-4-yl sodium sulfate and 2-ethyl-3-hydroxyhexyl sodium sulfate.
2. The concrete foaming agent of claim 1, wherein the weight ratio of sodium lauryl sulfate to the mixture of sodium 7-ethyl-2-methyl-undecan-4-yl sulfate and sodium 2-ethyl-3-hydroxyhexyl sulfate is 1-1.5: 2.
3. the concrete blowing agent of claim 2, wherein the weight ratio of sodium 7-ethyl-2-methyl-undecan-4-yl sulfate to sodium 2-ethyl-3-hydroxyhexyl sulfate is 1: 1-3.
4. The concrete foaming agent according to claim 2, wherein the vegetable protein is at least one selected from the group consisting of soybean meal, cottonseed meal, peanut meal, and rapeseed meal.
5. The concrete foaming agent of claim 4, wherein the weight ratio of the sodium dodecyl sulfate to the soybean meal is 2: 1.
6. the concrete blowing agent of claim 1, wherein the foam stabilizer comprises at least one of coconut oil fatty acid diethanolamide, silicone polyether emulsion, hydroxyethyl cellulose ether, and gelatin.
7. The concrete foaming agent of claim 6, wherein the foam stabilizer further comprises a polyvinyl acetate emulsion and an acrylate copolymer emulsion, and the weight ratio of the polyvinyl acetate emulsion to the acrylate copolymer emulsion is 1: 1-3.
8. The concrete foaming agent of claim 1, wherein the adjuvant is at least one selected from the group consisting of triethanolamine, diethanol monoisopropanolamine, sodium chloride, and potassium chloride.
9. The concrete foaming agent according to claim 1, wherein the organic hollow microspheres are poly (styrene-divinylbenzene) hollow microspheres and/or polystyrene microspheres, and the weight ratio of the poly (styrene-divinylbenzene) hollow microspheres to the polystyrene microspheres is 1: 1.
10. a method for preparing a concrete foaming agent according to any one of claims 1 to 9, comprising the steps of:
(1) mixing lauryl alcohol polyoxyethylene ether sodium sulfate, alkyl sulfate, 50% vegetable protein in parts by weight, cocamidopropyl betaine and water in parts by weight to obtain a mixture 1;
(2) placing the mixture 1 in a water bath at 40-50 ℃ for heating and stirring, wherein the stirring speed is 500rpm, and the stirring time is 10 min;
(3) adding 50% of vegetable protein, foam stabilizer, auxiliary agent and organic hollow microspheres in parts by weight in the stirring process, and stirring for 10-30min to obtain a mixture 2;
(4) cooling the mixture 2 to room temperature.
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| CN202011232424.2A CN112521050A (en) | 2020-11-06 | 2020-11-06 | Concrete foaming agent and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113135687A (en) * | 2021-05-13 | 2021-07-20 | 山东国宸装饰工程有限公司 | Decorative paper-faced gypsum board foaming agent and gypsum board containing same |
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