CN110950565B - PH value triggered self-repairing aggregate and preparation method thereof - Google Patents
PH value triggered self-repairing aggregate and preparation method thereof Download PDFInfo
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- CN110950565B CN110950565B CN201911337817.7A CN201911337817A CN110950565B CN 110950565 B CN110950565 B CN 110950565B CN 201911337817 A CN201911337817 A CN 201911337817A CN 110950565 B CN110950565 B CN 110950565B
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1055—Coating or impregnating with inorganic materials
- C04B20/107—Acids or salts thereof
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
Abstract
The invention discloses a PH value trigger type self-repairing aggregate and a preparation method thereof, wherein the method comprises the following steps: mixing the porous material with a repairing agent solution, and obtaining the porous material with the repairing agent adsorbed in pores under a vacuum condition; adding a trigger membrane material into a solvent, and stirring to obtain a trigger membrane solution; covering the surface of the porous material with the repairing agent adsorbed in the pores with the trigger film solution, and heating and drying to obtain the PH value trigger type self-repairing aggregate. The preparation method of the invention takes the lightweight aggregate as a carrier of the repairing agent and the trigger film, the repairing agent is absorbed through the pores of the lightweight aggregate, and the trigger film is covered on the surface of the lightweight aggregate to obtain the PH value trigger type self-repairing aggregate. The preparation method is simple, expensive equipment is not needed, the lightweight aggregate is cheap and easy to obtain, and the lightweight aggregate is used as the aggregate and doped into the cement-based material, so that the strength cannot be seriously reduced, and new defects cannot be introduced into the cement-based material.
Description
Technical Field
The invention relates to the technical field of cement-based materials, in particular to a pH value triggered self-repairing aggregate and a preparation method thereof.
Background
Cement-based materials are the most widely used materials in civil engineering and construction, and the durability of the cement-based materials determines the service life of the engineering and the construction benefit. The self-repairing technology of the traditional cement-based material aims at the crack, and the crack is repaired to cut off the channel for corrosive ions to enter the cement-based material. However, in many cases, even in the absence of cracks, carbon dioxide or corrosive ions may enter the interior of the cement-based material through the pores, resulting in the destruction of the reinforcing steel bar protective film in the cement-based material.
The existing method for solving the problem that the reinforcing steel bar protective film is damaged is pH trigger type microcapsules, although the effect of the microcapsules is proved in some researches, due to the fact that the manufacturing process is complicated and the cost is high, a defect is formed after a capsule fracture repairing agent flows out to influence the performance of a cement-based material, and the strength of the cement-based material is seriously influenced by the fact that a large amount of the capsule fracture repairing agent is mixed. Thus, large-scale use is somewhat limited.
Accordingly, the prior art is yet to be improved and developed.
Disclosure of Invention
The invention aims to solve the technical problems that the pH value trigger type self-repairing aggregate and the preparation method thereof are provided aiming at the defects in the prior art, and the problems that the existing pH trigger type microcapsule is complicated in manufacturing process and high in cost, a defect is formed after a capsule rupture repairing agent flows out to influence the performance of a cement-based material, and the strength of the cement-based material is seriously influenced by the large amount of the capsule rupture repairing agent.
The technical scheme adopted by the invention for solving the technical problem is as follows: a preparation method of a pH value triggered self-repairing aggregate comprises the following specific steps:
mixing the porous material with a repairing agent solution, and obtaining the porous material with the repairing agent adsorbed in pores under a vacuum condition;
adding a trigger membrane material into a solvent, and stirring to obtain a trigger membrane solution;
covering the surface of the porous material with the repairing agent adsorbed in the pores with the trigger film solution, and heating and drying to obtain the pH value trigger type self-repairing aggregate.
The preparation method of the pH value triggered self-repairing aggregate comprises the following steps of mixing the porous material with a repairing agent solution, and obtaining the porous material with the repairing agent adsorbed in pores under a vacuum condition:
and mixing the porous material with the repairing agent solution, vacuumizing for 30-45 min, drying the porous material to remove the moisture in the repairing agent solution in the porous material, and remaining crystals to obtain the porous material with the repairing agent adsorbed in pores.
The preparation method of the pH value triggered self-repairing aggregate comprises the step of preparing a porous material, wherein the porous material is one of light aggregate, porous expanded beads, zeolite, super absorbent resin and biochar.
The preparation method of the pH value triggered self-repairing aggregate comprises the step of preparing the porous material with the particle size of 1-2 mm.
The preparation method of the pH value triggered self-repairing aggregate comprises the following step of preparing a repairing agent, wherein the repairing agent is one or more of sodium nitrite, sodium monofluorophosphate, potassium dichromate, triethanolamine, trisodium phosphate, sodium tripolyphosphate and sodium benzoate.
The preparation method of the pH value trigger type self-repairing aggregate comprises the step of preparing a pH value trigger type self-repairing aggregate, wherein the trigger film material is ethyl cellulose.
The preparation method of the pH value triggering type self-repairing aggregate comprises the step of preparing a solvent, wherein the solvent is a mixed solution of toluene and absolute ethyl alcohol.
The preparation method of the pH value triggered self-repairing aggregate comprises the following step of preparing ethyl cellulose, toluene and absolute ethyl alcohol according to a mass ratio of 11:80: 20.
The preparation method of the pH value trigger type self-repairing aggregate comprises the following steps of covering the surface of the porous material with the repairing agent adsorbed in the pores with the trigger film solution, and obtaining the pH value trigger type self-repairing aggregate under the condition of heating and drying:
covering the surface of the porous material with the repairing agent adsorbed in the pores with the trigger film solution by a spraying method to obtain the porous material with the surface covered with the trigger film solution;
and heating and drying the porous material with the surface covered with the trigger film solution to obtain the pH value trigger type self-repairing aggregate.
A pH value trigger type self-repairing aggregate is prepared by any one of the preparation methods of the pH value trigger type self-repairing aggregate.
Has the advantages that: the preparation method of the invention takes the lightweight aggregate as a carrier of the repairing agent and the trigger film, adsorbs the repairing agent through the pores of the porous material, covers the trigger film solution on the surface of the lightweight aggregate, and cures the trigger film through heating and drying to obtain the pH value trigger type self-repairing aggregate. The preparation method of the invention is simple, does not need expensive equipment, and the lightweight aggregate is cheap and easy to obtain, and the lightweight aggregate can not cause serious reduction of strength when being doped into the cement-based material as the aggregate, and can not introduce new defects into the cement-based material.
Detailed Description
The invention provides a pH value triggered self-repairing aggregate and a preparation method thereof, and the invention is further described in detail below in order to make the purpose, technical scheme and advantages of the invention clearer. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Specifically, the preparation method of the pH value triggered self-repairing aggregate provided by the invention comprises the following steps:
and S1, mixing the porous material with the repairing agent solution, and obtaining the porous material with the repairing agent adsorbed in the pores under the vacuum condition.
Because the existing pH trigger type microcapsule has complicated manufacturing process and high cost, a defect can be formed after the capsule rupture repairing agent flows out to influence the performance of the cement-based material, and the strength of the cement-based material can be seriously influenced by the large amount of the capsule rupture repairing agent. In order to solve the above problem, in this embodiment, the pore characteristics of the porous material are utilized, and after the porous material is mixed with the repairing agent solution, the pores on the surface of the porous material absorb the repairing agent solution and finally reach a saturated state. In order to accelerate the process of adsorbing the repairing agent solution by the porous material, in this embodiment, the repairing agent solution is sufficiently adsorbed by the pores of the porous material under a vacuum condition, and then the repairing agent solution in the porous material is removed to obtain the porous material with the repairing agent adsorbed in the pores, so that the trigger film solution is covered on the surface of the porous material in the subsequent step. In the embodiment, the porous material is used as a carrier of the repairing agent, so that the problems that the performance of the cement-based material is influenced by a defect formed after the existing pH triggering type microcapsule is added into the cement-based material and the strength of the cement-based material is seriously influenced by a large amount of doping are solved.
In a specific embodiment, the step S1 specifically includes the steps of:
s11, mixing the porous material with the repairing agent solution, vacuumizing for 30-45 min, and drying the porous material to remove the repairing agent solution in the porous material, so as to obtain the porous material with the repairing agent adsorbed in pores.
In one embodiment, the remediation solution may be placed in a vacuum dish, and the porous material may then be added to the vacuum dish to provide a porous material solution. And then carrying out vacuum pumping treatment on the porous material solution for 30-45 min to enable the porous material to adsorb the repairing agent solution to reach a complete saturated state, so as to obtain the porous material adsorbed with the repairing agent solution. Since the pH value of the solution for dissolving the repairing agent is lower than 12, the trigger film is damaged, and in order not to affect the repairing performance of the pH value trigger type self-repairing aggregate, in this embodiment, after the excessive repairing agent solution is further filtered by the screen, the porous material is placed in the vacuum drying box to remove the moisture of the repairing agent solution on the surface of the porous material and in the pores of the porous material. In a specific embodiment, the vacuum pumping time is 30-45 min.
In a specific embodiment, the porous material is one of lightweight aggregate, porous expanded beads, zeolite, super absorbent resin and charcoal, the particle size of the porous material is 1-2 mm, and the repairing agent is one or more of water-soluble low-alkaline rust inhibitors such as sodium nitrite, sodium monofluorophosphate, potassium dichromate, triethanolamine, trisodium phosphate, sodium tripolyphosphate and sodium benzoate. In the embodiment, the porous material is used as a carrier of the repairing agent, so that the problems that the strength of the cement-based material is influenced when the existing pH triggering type microcapsule is added into the cement-based material and the defect is left in the cement-based material after the repairing agent flows out are solved. After the trigger film is broken, the repairing agent and the metal in the cement-based material can generate insoluble oxide to cover the metal surface, so that the metal in the cement-based material is passivated, and the metal in the cement-based material is prevented from being corroded.
Specifically, the preparation method of the pH value triggered self-repairing aggregate provided by the invention further comprises the following steps:
and S2, adding the trigger membrane material into the solvent, and stirring to obtain a trigger membrane solution.
In specific implementation, after the porous material with the repairing agent solution adsorbed in the pores is obtained, a layer of trigger film needs to be further covered on the surface of the porous material, so that after carbon dioxide or corrosive ions enter the cement-based material, the self-repairing agent in the porous material can be triggered to flow out on the metal surface of the cement-based material through the ion concentration difference to form a passivation layer, and the cement-based material is repaired. When the ion trigger membrane solution is prepared, a liquid transfer gun is used for extracting a solvent and placing the solvent into a beaker, then a trigger membrane material is added into the beaker, the beaker is placed into a magnetic stirrer and stirred until the trigger membrane material is completely dissolved, so that the trigger membrane solution is obtained, and a trigger membrane is prepared on the surface of a porous material in the subsequent step.
In a specific embodiment, the trigger membrane material is ethyl cellulose, the solvent is a mixed solution of toluene and absolute ethyl alcohol, the mass ratio of the ethyl cellulose to the toluene to the absolute ethyl alcohol is 11:80:20, and the trigger membrane solution obtained in the ratio can uniformly cover the surface of the porous material.
Specifically, the preparation method of the pH value triggered self-repairing aggregate provided by the invention further comprises the following steps:
and S3, covering the surface of the porous material with the repairing agent adsorbed in the pores with the trigger film solution, and heating and drying to obtain the pH value trigger type self-repairing aggregate.
In a specific embodiment, after the trigger film solution and the porous material with the repairing agent adsorbed in the pores are obtained, the trigger film solution is further covered on the surface of the porous material with the repairing agent adsorbed in the pores, and then the porous material with the trigger film solution covered on the surface is heated and dried to cure the trigger film covered on the surface, so that the pH value trigger type self-repairing aggregate is obtained. In a specific embodiment, the thickness of the trigger film is less than 100um, after the prepared pH value trigger type self-repairing aggregate is doped into the cement-based material, and after the pH value is lower than the trigger pH value of the trigger film material, the trigger film on the surface of the porous material is broken, so that liquid in the cement-based material enters pores of the porous material, a repairing agent in the pores is dissolved, the repairing agent solution flowing out of the pores from the pores through ion concentration difference and metal in the cement-based material generate insoluble oxide to cover the metal surface to form a passivation layer, and therefore the cement-based material is subjected to self-repairing. The preparation method of the pH value triggered self-repairing aggregate is simple, expensive equipment is not needed, the light aggregate is cheap and easy to obtain, the light aggregate is used as the aggregate and doped into the cement-based material, the strength of the cement-based material cannot be seriously reduced, and new defects cannot be introduced into the cement-based material.
In a specific embodiment, the step S3 specifically includes the steps of:
s31, covering the surface of the porous material with the repairing agent adsorbed in the pores with the trigger film solution by a spraying method to obtain the porous material with the surface covered with the trigger film solution;
and S32, heating and drying the porous material with the surface covered with the trigger film solution to obtain the pH value trigger type self-repairing aggregate.
In particular, the method for covering the surface of the porous material with the repairing agent adsorbed in the pores with the trigger film solution comprises a spraying method and a soaking method, but the spraying method is more uniform in thickness than the soaking method to form the trigger film. In one embodiment, the trigger film solution may be charged into a sprayer, the trigger film solution is applied by spraying to cover the surface of the porous material having the repairing agent adsorbed thereon, and the porous material is rotated while spraying to completely cover the surface thereof with the trigger film solution. And then putting the porous material with the trigger membrane solution covered on the surface into a heating dryer or heating and drying the porous material by a hot air blower, accelerating the volatilization of the solvent in the trigger membrane solution, and curing the trigger membrane on the surface of the porous material to form a membrane to obtain the pH value trigger type self-repairing aggregate. In a specific embodiment, the temperature of the heating and drying treatment is 40-60 ℃, and the time of the heating and drying treatment is 5-10 min.
The invention also provides the pH value triggered self-repairing aggregate, which is prepared by the preparation method.
The preparation method of the invention takes the lightweight aggregate as a carrier of the repairing agent and the trigger film, adsorbs the repairing agent through the pores of the porous material, covers the trigger film solution on the surface of the lightweight aggregate, and cures the trigger film through heating and drying to obtain the pH value trigger type self-repairing aggregate. The preparation method of the invention is simple, does not need expensive equipment, and the lightweight aggregate is cheap and easy to obtain, and the lightweight aggregate can not cause serious reduction of strength when being doped into the cement-based material as the aggregate, and can not introduce new defects into the cement-based material.
Example 1
(1) Selecting 10g of lightweight aggregate with the particle size of 1-2 mm, placing the lightweight aggregate in a vacuum dish containing 50% of sodium nitrite solution in mass concentration, and vacuumizing for 45min to enable the lightweight aggregate to fully adsorb the sodium nitrite solution to reach a saturated state. After filtering the excessive sodium nitrite solution by a sieve, putting the lightweight aggregate into a vacuum drying box until the lightweight aggregate is completely dried to obtain the lightweight aggregate with sodium nitrite absorbed in pores;
(2) 20ml of toluene solvent and 5ml of absolute ethyl alcohol were respectively extracted by a pipette and stirred uniformly in a beaker, and 2.75g of ethyl cellulose particles were weighed and added to the beaker. Placing the beaker on a magnetic stirring instrument and stirring until the ethyl cellulose particles are completely dissolved to obtain a trigger membrane solution;
(3) and (3) putting the trigger film solution into a sprayer, and spraying the trigger film solution on the surface of the lightweight aggregate while rotating. And starting the hot air blower to accelerate the solvent in the film solution to volatilize so as to cure the trigger film and obtain the pH value trigger type self-repairing aggregate.
And (3) testing results: the pH-triggered self-repairing aggregate prepared in the above example 1 is placed in an alkaline solution without sodium at a pH of 12 for 5 hours, and then sodium ions on the surface of the pH-triggered self-repairing aggregate are detected, and it is found that the sodium ion content is not increased. And then transferring the pH value trigger type self-repairing aggregate into a weak alkaline solution with the pH value of 10 to soak for 5h, and then detecting sodium ions on the surface of the aggregate to find that the concentration of the sodium ions on the surface of the aggregate is obviously increased, which indicates that the trigger film on the surface of the pH value trigger type self-repairing aggregate is broken in the weak alkaline solution with the pH value of 10 to cause the sodium nitrite solution in the pores of the lightweight aggregate to flow out.
In summary, the invention discloses a pH value triggered self-repairing aggregate and a preparation method thereof, and the method comprises the following steps: mixing the porous material with a repairing agent solution, and obtaining the porous material with the repairing agent adsorbed in pores under a vacuum condition; adding a trigger membrane material into a solvent, and stirring to obtain a trigger membrane solution; covering the surface of the porous material with the repairing agent adsorbed in the pores with the trigger film solution, and heating and drying to obtain the pH value trigger type self-repairing aggregate. The preparation method of the invention takes the lightweight aggregate as a carrier of the repairing agent and the trigger film, adsorbs the repairing agent through the pores of the lightweight aggregate, covers the trigger film solution on the surface of the lightweight aggregate, and cures the trigger film through heating and drying to obtain the pH value trigger type self-repairing aggregate. The preparation method of the invention is simple, does not need expensive equipment, and the lightweight aggregate is cheap and easy to obtain, and the lightweight aggregate can not cause serious reduction of strength when being doped into the cement-based material as the aggregate, and can not introduce new defects into the cement-based material.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.
Claims (7)
1. A preparation method of a pH value triggering type self-repairing aggregate is characterized by comprising the following steps:
mixing the porous material with a repairing agent solution, and obtaining the porous material with the repairing agent adsorbed in pores under a vacuum condition; the repairing agent is one or more of sodium nitrite, sodium monofluorophosphate, potassium dichromate, triethanolamine, trisodium phosphate, sodium tripolyphosphate and sodium benzoate; adding a trigger membrane material into a solvent, and stirring to obtain a trigger membrane solution; the trigger membrane material is ethyl cellulose; the solvent is a mixed solution of toluene and absolute ethyl alcohol; the mass ratio of the ethyl cellulose to the toluene to the absolute ethyl alcohol is 11:80: 20; covering the surface of the porous material with the repairing agent adsorbed in the pores with the trigger film solution, and heating and drying to obtain pH value trigger type self-repairing aggregate; the thickness of the trigger film on the surface of the porous material adsorbed with the repairing agent is less than 100 um.
2. The method for preparing the pH value triggered self-repairing aggregate according to claim 1, wherein the step of mixing the porous material with the repairing agent solution to obtain the porous material with the repairing agent adsorbed in pores under the vacuum condition specifically comprises the following steps:
and mixing the porous material with the repairing agent solution, vacuumizing for 30-45 min, drying the porous material to remove the moisture in the repairing agent solution in the porous material, and remaining crystals to obtain the porous material with the repairing agent adsorbed in pores.
3. The method for preparing the pH value triggered self-repairing aggregate according to claim 2, wherein the porous material is a lightweight aggregate.
4. The preparation method of the pH value triggered self-repairing aggregate according to claim 2, wherein the porous material is one of porous expanded microbeads, zeolite and biochar.
5. The preparation method of the pH value triggered self-repairing aggregate according to claim 3 or 4, wherein the particle size of the porous material is 1-2 mm.
6. The method for preparing the pH value triggered self-repairing aggregate according to claim 1, wherein the step of covering the surface of the porous material with the repairing agent adsorbed in pores with the trigger film solution and obtaining the pH value triggered self-repairing aggregate under a heating and drying condition specifically comprises the following steps:
covering the surface of the porous material with the repairing agent adsorbed in the pores with the trigger film solution by a spraying method to obtain the porous material with the surface covered with the trigger film solution;
and heating and drying the porous material with the surface covered with the trigger film solution to obtain the pH value trigger type self-repairing aggregate.
7. The pH value triggered self-repairing aggregate is characterized by being prepared by the preparation method of the pH value triggered self-repairing aggregate according to any one of claims 1-6.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1832629A1 (en) * | 2006-03-10 | 2007-09-12 | MPG Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. | Corrosion inhibiting pigment comprising nanoreservoirs of corrosion inhibitor |
| CN103496874A (en) * | 2013-09-16 | 2014-01-08 | 深圳大学 | Chemical self-repairing concrete with chemical trigger function and preparation method thereof |
| CN103601416A (en) * | 2013-11-01 | 2014-02-26 | 深圳大学 | Concrete chemical-selfreparing microcapsule and preparation method thereof |
| CN104725563A (en) * | 2013-12-19 | 2015-06-24 | 中国科学院金属研究所 | Corrosion inhibitor gel microsphere with intelligent pH value controlled release function and its preparation method and use |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110240446A (en) * | 2019-06-18 | 2019-09-17 | 中建西部建设贵州有限公司 | A kind of self-compacting lightweight aggregate machine-made sand concrete and preparation method thereof |
-
2019
- 2019-12-23 CN CN201911337817.7A patent/CN110950565B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1832629A1 (en) * | 2006-03-10 | 2007-09-12 | MPG Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. | Corrosion inhibiting pigment comprising nanoreservoirs of corrosion inhibitor |
| CN103496874A (en) * | 2013-09-16 | 2014-01-08 | 深圳大学 | Chemical self-repairing concrete with chemical trigger function and preparation method thereof |
| CN103601416A (en) * | 2013-11-01 | 2014-02-26 | 深圳大学 | Concrete chemical-selfreparing microcapsule and preparation method thereof |
| CN104725563A (en) * | 2013-12-19 | 2015-06-24 | 中国科学院金属研究所 | Corrosion inhibitor gel microsphere with intelligent pH value controlled release function and its preparation method and use |
Non-Patent Citations (1)
| Title |
|---|
| Application of encapsulated lightweight aggregate impregnated with sodium monofluorophosphate as a self-healing agent in blast furnace slag mortar;Kritsada Sisomphon;《ResearchGate》;20161010;第13-32页 * |
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