CN114988746B - Water-based permeable inorganic nano waterproof material and preparation method thereof - Google Patents
Water-based permeable inorganic nano waterproof material and preparation method thereof Download PDFInfo
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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
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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
- C04B2103/60—Agents for protection against chemical, physical or biological attack
- C04B2103/65—Water proofers or repellants
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Abstract
The invention discloses a water-based permeable inorganic nano waterproof material and a preparation method thereof, belonging to the technical field of concrete admixturesA domain. The raw materials comprise the following components in percentage by mass: 30-50% alkali metal silicate solution and modified nano TiO 2 0.5 to 2 percent of dispersion liquid, 0.1 to 2 percent of ion complexing agent, 0.2 to 0.5 percent of fluosilicate, 0.01 to 0.1 percent of wetting agent, 0.1 to 0.5 percent of preservative, 0.2 to 3 percent of pour point regulator and 48 to 65 percent of water; the modified nano TiO 2 The dispersion liquid is nano TiO 2 Powder, triethanolamine, sodium lauryl sulfate and water. The waterproof material disclosed by the invention can repair and heal fine cracks and crazes, has an obvious concrete repair effect, and has the characteristics of excellent anti-permeability performance, good durability and the like; can also form TiO on the concrete base surface and the permeable layer 2 A film having photocatalytic activity under sunlight or ultraviolet light.
Description
Technical Field
The invention belongs to the technical field of building material concrete admixtures, and particularly relates to a water-based permeable inorganic nano waterproof material and a preparation method thereof.
Background
The water-based permeable inorganic waterproofing agent is prepared by taking alkali metal silicate solution as a base material, adding a catalyst and an auxiliary agent, and mixing and reacting, and has the functions of permeability and sealing capillary channels and cracks of cement mortar and concrete. The main technical principle is that the main component silicate permeates into capillary channels of cement mortar or concrete and is hydrated with Ca (OH) generated in the process of cement hydration 2 And reacting to generate water-insoluble calcium silicate hydrate gel (C-S-H), thereby blocking internal pores, sealing capillary channels, increasing compactness, forming a permanent sealing waterproof layer integrated with concrete, improving the durability of the cement concrete, and playing a role in repairing and protecting. Compared with the traditional waterproof coiled material, waterproof coating and curingCompared with the protective material, the material can improve the quality of the cement concrete, can treat both symptoms and root causes, is green and environment-friendly, has long service life, and is a waterproof material with milestone significance. In order to further popularize the application of the product, the state revises the industrial standard JC/T1018-2020 aqueous permeable inorganic waterproofing agent of the material in 2020, optimizes unreasonable index items in the 2006 edition of standard and obtains favorable comment of relevant personnel in the industry.
In the prior art, a Chinese granted patent CN104844143B provides a spray-type aqueous inorganic gel waterproofing agent and a preparation method thereof, and raw materials of the spraying-type aqueous inorganic gel waterproofing agent are sodium silicate aqueous solution, sodium hydroxide, a catalyst, a surfactant and water. For example, CN104628354A provides a nano-modified self-permeable water-based repair material and a preparation method thereof, and the raw material of the nano-modified self-permeable water-based repair material comprises nano-SiO 2 The water-soluble paint comprises a polymer, water glass, a polycarboxylate superplasticizer, a defoaming agent surfactant, calcium chloride, a chelating agent and water. For example, CN106904928B, a reaction rate controllable water-based permeable crystallization waterproof material, and its preparation method and application, the raw materials include sodium silicate, surfactant, reaction retarder, reducing agent, reaction promoter, anti-freezing agent, metal ion blocking agent, surface enhancer, antirust agent and water. For example, CN111620715a provides an aqueous permeable crystallization type concrete surface layer reinforced material, its preparation method and application, the raw materials include lithium silicate, potassium silicate, sodium silicate, organosilicon, coagulant, waterproofing agent, surfactant, reaction retarder, anti-freezing agent, fluorosilicate, defoaming agent, multifunctional adjuvant, early strength agent and water. The research and development and application level of the water-based permeable inorganic waterproof material are gradually improved, and the water-based permeable inorganic waterproof material is gradually expanded from a single main material of sodium silicate, a single catalyst and an auxiliary agent to a plurality of main materials of sodium silicate, potassium silicate, lithium silicate, organic silicon and the like, and is added with a plurality of functional catalysts and auxiliary agents to realize the synergistic effect, so that the multi-dimensional repair, the adjustable reaction rate, the crystal enhancement and the synergy and other functional effects are achieved. However, after the material is applied to the surface of cement concrete, the related performance focus is mostly concentrated in the fields of water resistance, corrosion resistance, permeability resistance, durability, fine crack repair and the like, and people are fewOther hidden functional areas are of interest, such as the photocatalytic field. Nano TiO 2 2 The inorganic nano waterproof material has high photocatalytic activity, has important application value in the fields of sewage treatment, antibiosis and the like, has wide application prospect in the fields of water-based permeable inorganic waterproofing agents, and has important significance in ensuring that the concrete has good waterproof, anticorrosion and durable performances and has the functions of photocatalysis and photodegradation in view of the reason.
Disclosure of Invention
Aiming at the defects in the prior art, one of the purposes of the invention is to provide a water permeable inorganic nano waterproof material which can repair and heal tiny cracks and crazes, has obvious concrete repair effect, and has the characteristics of excellent permeability resistance, good durability and the like; can also form TiO on the concrete base surface and the permeable layer 2 A film having photocatalytic activity under sunlight or ultraviolet light. The water-based permeable inorganic nano waterproof material fills up the blank of the industry and provides a new idea for the development of the industry.
In order to achieve the purpose, the specific technical scheme of the invention is as follows:
the water-based permeable inorganic nano waterproof material comprises the following raw materials in percentage by mass: 30-50% of alkali metal silicate solution and modified nano TiO 2 0.5 to 2 percent of dispersion liquid, 0.1 to 2 percent of ion complexing agent, 0.2 to 0.5 percent of fluosilicate, 0.01 to 0.1 percent of wetting agent, 0.1 to 0.5 percent of preservative, 0.2 to 3 percent of pour point regulator and 48 to 65 percent of water;
the modified nano TiO 2 The dispersion liquid is nano TiO 2 Powder, triethanolamine, sodium lauryl sulfate and water.
Nano TiO 2 2 The powder has too small particle size and high surface energy, and is easy to agglomerate in aqueous solution, thereby seriously restricting the use effect of the powder in the field of materials. The invention adopts triethanolamine and sodium dodecyl sulfate to react with nano TiO 2 The powder is modified to improve its dispersibility. The existence of triethanolamine ensures the dispersibility of the system, and the triethanolamine and the lauryl sodium sulfate are hydrolyzedShows alkalinity, has higher pH value of the solution and promotes the nano TiO 2 Dispersion of (2). Meanwhile, the high-molecular long chain of the sodium dodecyl sulfate plays a role in steric hindrance, so that the dispersed slurry is more stable; therefore, under the combined action of triethanolamine and sodium dodecyl sulfate, the nano TiO is improved 2 Dispersibility and stability of (A).
When the alkali silicate material penetrates into the concrete surface layer and Ca 2+ During reaction, nano TiO 2 The crystal nucleus effect is exerted to reduce the activation energy of chemical reaction, promote the reaction to proceed, quickly block the concrete pores and micro cracks, and simultaneously modify the nano TiO 2 The triethanolamine in the dispersion can improve the strength of gel generated by reaction, and further improve the repairing effect; on the other hand, the alkali metal silicate solution has higher pH value and is modified with nano TiO 2 The nano TiO can be further improved after the dispersion liquid is mixed 2 The dispersibility of the particles, and the alkali metal silicate as an inorganic material dispersed in the nano TiO 2 When in use, a layer of inorganic film can be formed around the particles after the water is volatilized 2 The particles are wrapped to avoid nano TiO 2 Deactivation, yellowing or powdering, maintaining its excellent photochemical activity.
In conclusion, the modified nano TiO 2 Has superfine filling effect and crystal nucleus effect, and can promote alkali metal silicate and Ca 2+ The self-repairing speed and the compactness of the concrete are obviously improved by the reaction of (1); on the other hand, the alkali metal silicate can improve the nano TiO 2 Dispersibility of particles and formation of inorganic film to nano TiO 2 The particles play a protective role. Modified nano TiO 2 After the water in the dispersion liquid is volatilized, the nano TiO 2 The particles are wrapped by an inorganic film to form a layer of transparent TiO 2 The film has strong oxidation-reduction capability under the action of visible light or ultraviolet light, and can exert excellent photocatalytic effect. In the modified nanometer TiO 2 Under the action of the alkali metal silicate, the repairing material with small grain size, strong permeability, high reaction speed and good photocatalytic performance is formed, and the repairing effect of the damaged concrete structure is obviously improved.
Preferably, theModified nano TiO 2 The preparation method of the dispersion liquid comprises the following steps: 1 part by weight of nano TiO 2 Mixing the powder with 100 parts by weight of water, adding 10 parts by weight of triethanolamine and 5 parts by weight of sodium dodecyl sulfate, and performing ultrasonic dispersion to obtain the modified nano TiO 2 And (3) dispersing the mixture.
Preferably, the alkali metal silicate solution comprises at least one of a sodium silicate aqueous solution with a mass fraction of 30-40%, a potassium silicate aqueous solution with a mass fraction of 30-40%, or a lithium silicate aqueous solution with a mass fraction of 20-30%. The function of the method is to generate CaSiO by chemical reaction with calcium ions in the capillary solution of concrete 3 The crystal fills cracks and pores, and the effects of increasing compactness and repairing and enhancing are achieved.
Preferably, the ion complexing agent comprises at least one of sodium gluconate, sodium maleate or sodium citrate. The sodium gluconate has strong complexing ability to calcium, magnesium and iron salts and can be used for complexing with Ca in cement concrete 2+ By action of unstable complexes, when there is SiO 3 2- When the complex exists, the complex can be hydrolyzed to generate more stable hydrated calcium silicate; the ionic complexing agent plays a role in carrying Ca 2+ The action of (1) promoting Ca 2+ And the anti-permeability performance of the concrete is obviously improved by the reaction with alkali metal silicate.
Preferably, the wetting agent comprises at least one of sodium dodecyl sulfonate, sodium dodecyl benzene sulfonate, an alkynol surfactant, or a fluorocarbon surfactant. The wetting agent can make the surface of the cement concrete be more easily soaked by aqueous solution, and the surface tension or the interfacial tension of the solution is reduced, so that the surface of the cement concrete can be spread on the surface of the cement concrete or penetrate into the surface of the cement concrete to fully wet the surface of the cement concrete, and the effective active ingredients are promoted to rapidly penetrate into a concrete structure.
Preferably, the set control agent comprises at least one of citric acid or levotartaric acid. Adjusting agent for cement hydration product Ca 2+ Has chelating effect, and can effectively reduce silicate and Ca 2+ The reaction rate of (2).
Preferably, the nano TiO 2 The effective content of the powder is more than 99wt%, and the specific surface area is largeAt 40m 2 Has hydrophilicity. Nano TiO 2 2 The powder has the characteristics of ultrafine particle size, high purity, high specific surface area and the like, and has a unique anatase type and rutile type mixed crystal structure, so that the powder has excellent performance in the field of photocatalytic self-cleaning building materials, and the powder has good compatibility with aqueous permeable crystalline materials due to hydrophilicity.
Preferably, the triethanolamine is industrial grade, and the effective content is more than 85wt%; the sodium dodecyl sulfate is a chemical pure reagent.
Preferably, the fluorosilicate salt comprises at least one of sodium fluorosilicate or potassium fluorosilicate. The fluosilicate is used as a curing agent, can improve the strength of water glass reaction crystals, can fix cement hydration products such as calcium hydroxide and the like on the surface of concrete, prevents surface weathering, improves the surface strength and enhances the carbonization resistance of a matrix.
Preferably, the preservative is sodium monofluorophosphate, has an obvious bactericidal effect, can inhibit growth and propagation of aspergillus niger, staphylococcus aureus and the like on the surface of cement concrete, and improves the corrosion resistance of a concrete structure.
The invention also aims to provide a preparation method of the water-based permeable inorganic nano waterproof material, which comprises the following steps:
s1, adding water into a container, and then adding modified nano TiO 2 Uniformly stirring the dispersion liquid, the ion complexing agent, the fluosilicate, the wetting agent, the preservative and the coagulation regulator to obtain a mixed solution;
s2, adding an alkali metal silicate solution into the mixed solution obtained in the step S1 while stirring, and filtering to obtain the water-based permeable inorganic nano waterproof material.
Compared with the prior art, the invention has the advantages that:
(1) The modified nano TiO in the waterproof material of the invention 2 The concrete has the superfine filling effect and the crystal nucleus effect, and can obviously improve the self-repairing speed and the compactness of the concrete; on the other hand, the alkali metal silicate can improve the nano TiO 2 Dispersibility of particles and formation of inorganic film to nano TiO 2 The particles play a protective role; nano TiO 2 2 Dispersing in aqueous solution, volatilizing water to obtain nanometer TiO 2 The particles are wrapped by an inorganic film to form TiO 2 Film, can avoid nano TiO 2 The particles are inactivated, yellowed or pulverized, and maintain excellent photochemical activity; so that the photocatalyst has strong oxidation-reduction capability under the action of visible light or ultraviolet light and can exert excellent photocatalytic effect. In the modified nanometer TiO 2 Under the action of the alkali metal silicate, the repairing material with small grain size, strong permeability, high reaction speed and good photocatalytic performance is formed, and the repairing effect of the damaged concrete structure is obviously improved.
(2) The invention adopts triethanolamine and sodium dodecyl sulfate to react with nano TiO 2 The powder is modified to improve its dispersibility.
(3) The invention utilizes ion complexing agent to complex Ca 2+ Reacts with alkali metal silicate to fill pores, and obviously improves the impermeability of concrete.
Detailed Description
The technical solutions of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The embodiment provides a water-based permeable inorganic nano waterproof material, which comprises the following components in percentage by mass: 10% of lithium silicate solution, 13% of potassium silicate solution, 19% of sodium silicate solution and modified nano TiO 2 0.5% of dispersion liquid, 0.3% of ion complexing agent, 0.4% of fluorosilicate, 0.02% of wetting agent, 0.3% of preservative, 0.4% of pour point regulator and 56.08% of water;
wherein the lithium silicate solution is a lithium silicate aqueous solution with the mass fraction of 22%, the potassium silicate solution is a potassium silicate aqueous solution with the mass fraction of 40%, and the sodium silicate solution is a sodium silicate aqueous solution with the mass fraction of 36%; the ion complexing agent is sodium gluconate; the fluosilicate is sodium fluosilicate; the wetting agent is a fluorocarbon surfactant; the preservative is sodium monofluorophosphate; the coagulation regulator is citric acid;
modified nano TiO 2 The preparation method of the dispersion liquid comprises the following steps: weighing 1 part by weight of nano TiO 2 Pouring the powder into a beaker, adding 100 parts by weight of deionized water, stirring and dispersing, adding 10 parts by weight of triethanolamine and 5 parts by weight of sodium dodecyl sulfate, stirring for 10-20 min, and dispersing in a high-power ultrasonic cell crusher for 20-30 min to obtain the modified nano TiO 2 And (3) dispersing the mixture.
The embodiment also provides a preparation method of the water-based permeable inorganic nano waterproof material, which comprises the following steps:
s1, weighing the raw materials according to the mass percentage, adding deionized water into a mixing reactor, and sequentially adding modified nano TiO 2 Dispersing liquid, ion complexing agent, fluorosilicate, wetting agent, preservative and coagulation regulator, and stirring for 20-60 min to obtain mixed liquid;
s2, adding a lithium silicate solution, a potassium silicate solution and a sodium silicate solution into the mixed solution obtained in the step S1, stirring while adding, filtering to remove impurities in the solution after fully and uniformly stirring, and obtaining the clear solution after filtering treatment, namely the water-based permeable inorganic nano waterproof material.
Example 2
This example is substantially the same as example 1, except that: modified nano TiO 2 The mass percent of the dispersion liquid is 2 percent, and the mass percent of the water is 54.58 percent.
Example 3
This embodiment is substantially the same as embodiment 1 except that: the mass percent of the ion complexing agent is 0.6 percent, and the mass percent of the water is 55.78 percent.
Example 4
This embodiment is substantially the same as embodiment 1 except that: modified nano TiO 2 The mass percent of the dispersion liquid is 2%, the mass percent of the ion complexing agent is 0.6%, and the mass percent of the water is 54.28%.
Comparative example 1
This comparative example is essentially the same as example 4, except that: the raw materials do not contain an ion complexing agent.
Comparative example 2
This comparative example is essentially the same as example 4, except that: the raw materials do not contain modified nano TiO 2 And (3) dispersing the mixture.
Comparative example 3
This comparative example is essentially the same as example 4, except that: the raw materials do not contain ion complexing agent and modified nano TiO 2 And (3) dispersing the mixture.
Comparative example 4
This comparative example is essentially the same as example 3, except that: modified nano TiO 2 The preparation method of the dispersion liquid comprises the following steps: weighing 1 part by weight of nano TiO 2 Pouring the powder into a beaker, adding 100 parts by weight of deionized water, stirring and dispersing, adding 10 parts by weight of triethanolamine, stirring for 10-20 min, and dispersing in a high-power ultrasonic cell crusher for 20-30 min to obtain the modified nano TiO 2 And (3) dispersing the mixture.
That is, the modified nano TiO of this comparative example was compared with example 3 2 The dispersion did not contain sodium lauryl sulfate.
The formulations of the aqueous permeation type inorganic nano waterproof materials of examples 1 to 4 and comparative examples 1 to 3 are shown in table 1.
TABLE 1 formulation of aqueous permeable inorganic nano-water-proof material for each example and comparative example (% by mass)
Test example 1 penetration height ratio and anti-carbonization value test
According to the relevant regulations of 7.9 and 7.10 in JC/T1018-2020 aqueous permeable inorganic waterproofing agent, the penetration height ratio and the carbonization resistance value of the concrete of examples 1 to 4 and comparative examples 1 to 3 are measured, and each group is subjected to test piece forming and curing according to the standard requirements; the test results are shown in table 2.
TABLE 2 penetration height ratio and anti-carbonation value%
Remarking: the reference specimen (blank group) had a penetration height of 32mm, a carbonization depth of 7d of 6.7mm, and a carbonization depth of 28d of 14mm.
As can be seen from the test results in Table 2, the concrete samples soaked in the waterproof material of the present invention have improved impermeability and carbonization resistance compared to the blank samples. By comparing examples 1 and 2, and examples 3 and 4, it can be seen that nano TiO is modified with the modification 2 The anti-permeability performance and the anti-carbonization performance of the concrete are improved by increasing the mixing amount of the dispersion liquid; by comparing examples 1 and 3 and examples 2 and 4, it was found that the anti-permeability and anti-carbonation properties of the concrete were improved as the amount of the ion-complexing agent was increased. This indicates that Ca is complexed using an ionic complexing agent 2+ In combination with nano TiO 2 The superfine filling and the crystal nucleus function can effectively improve the impermeability and the carbonization resistance of the concrete. Compared with example 4, comparative example 1 lacks an ion complexing agent, and the anti-permeability performance and the anti-carbonization performance are obviously reduced; comparative example 2 lack of modified nano TiO 2 The dispersion has slightly reduced barrier properties; comparative example 3 lack of ionic complexing agent and modified nano TiO 2 The penetration height ratio and the anti-carbonization value of the dispersion liquid and the concrete can not meet the standard requirement of JC/T1018-2020. In addition, as can be seen from the test results of comparative example 1, comparative example 2 and comparative example 3, the concrete impermeability and carbonation resistance influence factors: ion complexing agent & gt modified TiO 2 And (3) dispersing the mixture. Meanwhile, the inventor finds that when the doping amount of the ion complexing agent is further increased, the gelation time is shortened, and the waterproof material is not beneficial to permeating into the deep part of the concrete, so that the mass percent of the ion complexing agent is limited to 0.1-2%.
Test example 2 photocatalytic performance test
P.O 42.5 cement, natural sand with the gradation of 0.15-4.75mm meeting the national standard requirements, a naphthalene-based high-efficiency water reducing agent and water are stirred to obtain a common concrete mixture, and a concrete product with the size of 100 x 100mm is formed by mechanical pressing. Wherein the mass ratio of the aggregate, the cement, the water and the water reducing agent is 3.
After the concrete product is cured for 28 days, the concrete is soaked by the aqueous permeable inorganic waterproofing agent in the examples 3 and 4 and the comparative example 2, the leaching height is 10mm, the soaking time is 1d, the concrete is cured for 6 days after soaking, and after the concrete is naturally dried for 24 hours, a 35W fluorescent lamp is used as a light source, and a rhodamine B solution is used as a photocatalytic degradation object.
The test experiment for degrading rhodamine B by photocatalysis comprises the following steps:
(1) Preparing 10mg/L rhodamine B solution, respectively diluting to obtain 8mg/L, 6mg/L, 2mg/L and 0 rhodamine B solution, and measuring the linear relation between the rhodamine B concentration and the absorbance at the wavelength of 554nm by using an ultraviolet spectrophotometer to obtain a standard curve.
(2) Putting the concrete product soaked by the water-based permeable inorganic waterproofing agent into a container, adding 10mg/L rhodamine B solution, and turning on a fluorescent lamp for a photocatalysis experiment.
(3) And measuring the absorbance of the solution by using an ultraviolet-visible spectrophotometer after the photocatalysis is carried out for a certain time, and calculating the concentration of the rhodamine B solution according to a standard curve.
(4) The photocatalytic efficiency of the photocatalyst is characterized according to the concentration change of rhodamine B as follows: (initial concentration-concentration after a certain time of photocatalysis)/initial concentration, the test results are shown in table 3.
TABLE 3 photocatalytic degradation efficiency of concrete products impregnated with visible light on rhodamine B
| Group of | Rhodamine B initial concentration (mg/L) | 20 hours photocatalytic efficiency (%) |
| Example 3 | 10 | 4.4 |
| Example 4 | 10 | 8.1 |
| Comparative example 2 | 10 | 0.2 |
| Comparative example 4 | 10 | 2.1 |
As can be seen from the test results in Table 3, the thin film formed on the surface layer of concrete using the aqueous permeable inorganic nanomaterial of the present invention has good photocatalytic efficiency, and it can be seen from comparison of examples 3 and 4 that TiO is modified with the water 2 The mixing amount of the dispersion liquid is increased, and the photocatalytic efficiency is improved. By comparing example 3 with comparative example 4, it can be seen that TiO when modified 2 In the absence of sodium lauryl sulfate in the dispersion, the photocatalytic efficiency decreases.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The water-based permeable inorganic nano waterproof material is characterized by comprising the following raw materials in percentage by mass: 30 to 50 percent of alkali metal silicate solution and modified nano TiO 2 0.5 to 2 percent of dispersion liquid, 0.1 to 2 percent of ion complexing agent, 0.2 to 0.5 percent of fluosilicate, 0.01 to 0.1 percent of wetting agent, 0.1 to 0.5 percent of preservative, 0.2 to 3 percent of coagulant regulator and 48 to 65 percent of water;
the modified nano TiO 2 The dispersion liquid is nano TiO 2 A mixed solution of powder, triethanolamine, sodium lauryl sulfate and water;
the ion complexing agent comprises at least one of sodium gluconate, sodium maleate or sodium citrate; the pour point regulator comprises at least one of citric acid or levotartaric acid; the nano TiO 2 The effective content of the powder is more than 99wt%, and the specific surface area is more than 40m 2 Has hydrophilicity.
2. The water-based permeable inorganic nano waterproof material as claimed in claim 1, wherein the modified nano TiO is 2 The preparation method of the dispersion liquid comprises the following steps: 1 part by weight of nano TiO 2 Mixing the powder with 100 parts by weight of water, adding 10 parts by weight of triethanolamine and 5 parts by weight of sodium dodecyl sulfate, and performing ultrasonic dispersion to obtain the modified nano TiO 2 And (3) dispersing the mixture.
3. The water-based permeable inorganic nano waterproof material as claimed in claim 1, wherein the alkali metal silicate solution comprises at least one of 30 to 40 mass% of sodium silicate aqueous solution, 30 to 40 mass% of potassium silicate aqueous solution or 20 to 30 mass% of lithium silicate aqueous solution.
4. The aqueous permeable inorganic nano waterproof material of claim 1, wherein the wetting agent comprises at least one of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, alkynol surfactant or fluorocarbon surfactant.
5. The aqueous permeable inorganic nano waterproof material of claim 1, wherein the fluorosilicate comprises at least one of sodium fluorosilicate or potassium fluorosilicate.
6. The method for preparing the aqueous permeable inorganic nano waterproof material of any one of claim 1~5 comprising the steps of:
s1, adding water into a container, and then adding modified nano TiO 2 Uniformly stirring the dispersion liquid, the ion complexing agent, the fluosilicate, the wetting agent, the preservative and the coagulation regulator to obtain a mixed liquid;
and S2, adding an alkali metal silicate solution into the mixed solution obtained in the step S1 while stirring, and filtering to obtain the water-based permeable inorganic nano waterproof material.
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| CN105218152A (en) * | 2015-09-16 | 2016-01-06 | 桂林市和鑫防水装饰材料有限公司 | A kind of infiltration crystallization type concrete water-resisting agent |
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