CN111138139A - Preparation method of antibacterial concrete - Google Patents
Preparation method of antibacterial concrete Download PDFInfo
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- CN111138139A CN111138139A CN202010019160.6A CN202010019160A CN111138139A CN 111138139 A CN111138139 A CN 111138139A CN 202010019160 A CN202010019160 A CN 202010019160A CN 111138139 A CN111138139 A CN 111138139A
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- chain extender
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/28—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/282—Polyurethanes; Polyisocyanates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/2805—Compounds having only one group containing active hydrogen
- C08G18/2815—Monohydroxy compounds
- C08G18/284—Compounds containing ester groups, e.g. oxyalkylated monocarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3203—Polyhydroxy compounds
- C08G18/3206—Polyhydroxy compounds aliphatic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3225—Polyamines
- C08G18/3228—Polyamines acyclic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/34—Carboxylic acids; Esters thereof with monohydroxyl compounds
- C08G18/348—Hydroxycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/6541—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen the low-molecular compounds being compounds of group C08G18/34
-
- 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
- C04B2103/67—Biocides
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2092—Resistance against biological degradation
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
The invention provides a preparation method of antibacterial concrete, which comprises the following steps: 32-40 parts of coarse aggregate and 8-10 parts of fine aggregate after crushing and sorting waste concrete, 8-10 parts of portland cement, 16-21 parts of sand, 4-7 parts of water and 1-5 parts of antibacterial liquid, wherein the antibacterial concrete is prepared by mixing and stirring the components, the antibacterial liquid is prepared by mixing and heating 1-5 parts of polyol and 4-20 parts of diisocyanate for reaction, adding a hydrophilic chain extender and a catalyst for continuous heating reaction, adding ethylparaben for end-capping reaction, adding triethylamine for neutralization reaction, and adding deionized water containing a small-molecule chain extender for emulsification and dispersion. According to the preparation method of the antibacterial concrete, the compatibility and the adhesive force of ethylparaben and waterborne polyurethane in the antibacterial liquid are improved, so that the prepared concrete has good antibacterial performance and is stable and durable in bacteriostasis.
Description
Technical Field
The invention relates to the field of building materials, in particular to a preparation method of antibacterial concrete.
Background
The concrete is one of the most important building engineering materials at present, and is an artificial stone material prepared from a cementing material, an aggregate and water according to a certain proportion, formed by stirring and vibrating and cured under certain conditions, has the characteristics of rich raw materials, low price and simple production process, and is widely used in the construction of various buildings. With the vigorous development of agricultural buildings and structures, food industry and other organic matter processing industry and the mass emergence of organic wastes, a large amount of bacteria and superfine fungi are parasitic in capillary tissues of concrete, so that sandstone aggregates of the concrete are polluted, and the durability of the concrete is seriously influenced.
The common antibacterial concrete is prepared by adding ethyl p-hydroxybenzoate for bacteriostasis, and the single addition of the conventional antibacterial concrete can cause quick loss of the antibacterial capability of the concrete due to environmental reasons such as outdoor sunshine exposure, rain wash and the like, and cannot achieve a good effect.
Disclosure of Invention
The invention aims to provide a preparation method of antibacterial concrete, and the prepared antibacterial concrete has a stable long-term antibacterial effect and is suitable for being widely applied to various buildings.
A preparation method of antibacterial concrete comprises the following components: 32-40 parts of coarse aggregate and 8-10 parts of fine aggregate after crushing and sorting waste concrete, 8-10 parts of portland cement, 16-21 parts of sand, 4-7 parts of water and 1-5 parts of antibacterial liquid, wherein the antibacterial concrete is prepared after the components are mixed and stirred, and the antibacterial concrete is characterized in that: the antibacterial liquid is prepared by the following steps:
step one, mixing 1-5 parts of polyol and 4-20 parts of diisocyanate, heating and reacting to obtain a reaction solution (1);
step two, adding a hydrophilic chain extender and a catalyst into the reaction liquid (1) obtained in the step one to carry out heating reaction to obtain a reaction liquid (2);
adding ethylparaben into the reaction liquid (2) obtained in the step two to carry out end-capping reaction to obtain reaction liquid (3);
and step four, adding triethylamine into the reaction liquid (3) obtained in the step three to adjust the neutralization degree, and then adding deionized water containing a small molecular chain extender to carry out emulsification and dispersion to obtain the antibacterial waterborne polyurethane emulsion.
Further, heating the polyol and the diisocyanate in the step one to 70-80 ℃ in a reactor, and reacting for 2h +/-10 min; adding a hydrophilic chain extender and a catalyst in the second step, heating to 80-90 ℃, and reacting for 0.5h +/-10 min; and step three, adding ethylparaben to carry out end capping, maintaining the temperature at 80-90 ℃, and reacting for 1h +/-10 min.
Further, in the first step, the polyol and the diisocyanate are metered by NCO/OH, and the molar ratio is controlled to be 3-4; in the second step, the hydrophilic chain extender accounts for 6-10% of the mass of the polyhydric alcohol, and the neutralization degree is 90-100%; in the third step, the content of ethylparaben is 1/4-1/6 of diisocyanate.
Further, in the second step, the hydrophilic chain extender is one or a mixture of two of dimethylolpropionic acid and dimethylolbutyric acid.
Further, in the second step, the catalyst is one or a mixture of dibutyltin dilaurate, stannous octoate, dibutyltin bis (dodecyl sulfur) and dibutyltin diacetate.
Further, in the fourth step, the small molecule chain extender is one or a mixture of two of 1, 4 butanediol and ethylene diamine.
Detailed Description
The technical solution of the present invention will be further specifically described below by way of specific examples. It should be noted that the described embodiments are only a part of the embodiments of the present invention, and not all 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. Heating 3 parts of polyol and 12 parts of diisocyanate in a three-port reactor provided with a condenser pipe, a mechanical stirrer and a nitrogen introducing pipe to 75 ℃ for reaction for 2 hours to generate a polyurethane prepolymer with an isocyanate group at the base end, wherein the polyol and the diisocyanate are metered by NCO/OH, and the molar ratio is controlled to be 3.5; after the reaction is finished, adding a hydrophilic chain extender and a catalyst, wherein the mass of the hydrophilic chain extender is 8% of that of the polyhydric alcohol, and the neutralization degree is 95%, heating to 85 ℃ for reaction for 0.5h to generate the polyurethane prepolymer, the end group of which is an isocyanate group, with a hydrophilic group, wherein the hydrophilic chain extender is one or a mixture of two of dimethylolpropionic acid and dimethylolbutyric acid, and the catalyst is one or a mixture of two of dibutyltin dilaurate, stannous octoate, dibutyltin didodecyl sulfide and dibutyltin diacetate; adding 1/4-1/6 of ethylparaben with the mass of diisocyanate after the reaction is finished, and carrying out end-capping reaction for 1 h; and after the reaction is finished, adding triethylamine for neutralization, and then adding deionized water containing a micromolecular chain extender for emulsification and dispersion to obtain the antibacterial waterborne polyurethane emulsion, wherein the micromolecular chain extender is one or a mixture of two of 1, 4 butanediol or ethylenediamine.
The chemical reaction formula is as follows:
and mixing and stirring 3 parts of the obtained antibacterial liquid, 35 parts of coarse aggregate and 9 parts of fine aggregate after crushing and sorting the waste concrete, 9 parts of Portland cement, 18 parts of sand and 5 parts of water to obtain the antibacterial concrete.
According to the invention, the diisocyanate and the polyol are reacted to form the polyurethane prepolymer containing the isocyanate group, and the ethylparaben is used for blocking the isocyanate group, so that the stability of the antibacterial liquid is greatly improved, and the antibacterial performance of the concrete is enhanced.
The above description is only exemplary of the present invention, and the scope of the present invention is not limited thereto, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. The preparation method of the antibacterial concrete comprises the following steps of crushing and sorting waste concrete, namely 32-40 parts of coarse aggregate and 8-10 parts of fine aggregate, 8-10 parts of portland cement, 16-21 parts of sand, 4-7 parts of water and 1-5 parts of antibacterial liquid, wherein the components are mixed and stirred to prepare the antibacterial concrete, and the antibacterial concrete is characterized in that the antibacterial liquid is prepared according to the following steps:
step one, mixing 1-5 parts of polyol and 4-20 parts of diisocyanate, heating and reacting to obtain a reaction solution (1);
step two, adding a hydrophilic chain extender and a catalyst into the reaction liquid (1) obtained in the step one to carry out heating reaction to obtain a reaction liquid (2);
adding ethylparaben into the reaction liquid (2) obtained in the step two to carry out end-capping reaction to obtain reaction liquid (3);
and step four, adding triethylamine into the reaction liquid (3) obtained in the step three to adjust the neutralization degree, and then adding deionized water containing a small molecular chain extender to carry out emulsification and dispersion to obtain the antibacterial waterborne polyurethane emulsion.
2. The preparation method of bacteriostatic concrete according to claim 1, characterized in that in the step one, the temperature of the polyol and the diisocyanate is raised to 70-80 ℃ in a reactor, and the reaction is carried out for 2h +/-10 min; adding a hydrophilic chain extender and a catalyst in the second step, heating to 80-90 ℃, and reacting for 0.5h +/-10 min; and step three, adding ethylparaben to carry out end capping, maintaining the temperature at 80-90 ℃, and reacting for 1h +/-10 min.
3. The method for preparing bacteriostatic concrete according to claim 1, wherein in the first step, the polyol and the diisocyanate are measured by NCO/OH, and the molar ratio is controlled to be 3-4; in the second step, the hydrophilic chain extender accounts for 6-10% of the mass of the polyhydric alcohol, and the neutralization degree is 90-100%; in the third step, the content of ethylparaben is 1/4-1/6 of diisocyanate.
4. The method for preparing bacteriostatic concrete according to claim 1, wherein in step two, the hydrophilic chain extender is one or a mixture of dimethylolpropionic acid and dimethylolbutyric acid.
5. The preparation method according to claim 1, wherein the catalyst in the second step is one or more of dibutyltin dilaurate, stannous octoate, dibutyltin bis (dodecylthio) and dibutyltin diacetate.
6. The method for preparing bacteriostatic concrete according to claim 1, wherein the small-molecule chain extender in step four is one or a mixture of two of 1, 4-butanediol and ethylenediamine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010019160.6A CN111138139A (en) | 2020-01-08 | 2020-01-08 | Preparation method of antibacterial concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010019160.6A CN111138139A (en) | 2020-01-08 | 2020-01-08 | Preparation method of antibacterial concrete |
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| Publication Number | Publication Date |
|---|---|
| CN111138139A true CN111138139A (en) | 2020-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010019160.6A Pending CN111138139A (en) | 2020-01-08 | 2020-01-08 | Preparation method of antibacterial concrete |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1611521A (en) * | 2003-06-23 | 2005-05-04 | 拜尔材料科学股份公司 | Aqueous formulations of hydrophilic polyurethane resins |
| KR101022413B1 (en) * | 2010-10-14 | 2011-03-15 | 대명콘텍 주식회사 | The functionalconcrete block purficating the air and water |
| CN103045026A (en) * | 2012-12-26 | 2013-04-17 | 燕山大学 | Waterproof corrosion-resistant heat-insulating coating |
| CN103980461A (en) * | 2014-05-23 | 2014-08-13 | 清远市美乐仕油墨有限公司 | Hydrolysis-resistant water-based polyurethane dispersion and preparation method thereof |
| CN107868202A (en) * | 2017-12-15 | 2018-04-03 | 黔南民族师范学院 | A kind of preparation method of organic-silicon-modified antibacterial aqueous polyurethane |
| CN108178584A (en) * | 2018-02-05 | 2018-06-19 | 上海良延环保科技发展有限公司 | A kind of regenerated environment protecting concrete |
| CN108299614A (en) * | 2017-12-29 | 2018-07-20 | 合肥科天水性科技有限责任公司 | A kind of antibacterial cation waterborne polyurethane resin and preparation method thereof |
-
2020
- 2020-01-08 CN CN202010019160.6A patent/CN111138139A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1611521A (en) * | 2003-06-23 | 2005-05-04 | 拜尔材料科学股份公司 | Aqueous formulations of hydrophilic polyurethane resins |
| KR101022413B1 (en) * | 2010-10-14 | 2011-03-15 | 대명콘텍 주식회사 | The functionalconcrete block purficating the air and water |
| CN103045026A (en) * | 2012-12-26 | 2013-04-17 | 燕山大学 | Waterproof corrosion-resistant heat-insulating coating |
| CN103980461A (en) * | 2014-05-23 | 2014-08-13 | 清远市美乐仕油墨有限公司 | Hydrolysis-resistant water-based polyurethane dispersion and preparation method thereof |
| CN107868202A (en) * | 2017-12-15 | 2018-04-03 | 黔南民族师范学院 | A kind of preparation method of organic-silicon-modified antibacterial aqueous polyurethane |
| CN108299614A (en) * | 2017-12-29 | 2018-07-20 | 合肥科天水性科技有限责任公司 | A kind of antibacterial cation waterborne polyurethane resin and preparation method thereof |
| CN108178584A (en) * | 2018-02-05 | 2018-06-19 | 上海良延环保科技发展有限公司 | A kind of regenerated environment protecting concrete |
Non-Patent Citations (2)
| Title |
|---|
| 欧阳慧等: "《绿色品牌包装创新研究》", 31 January 2018, 长春：吉林大学出版社 * |
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Inventor after: Huang Jianming Inventor after: Chen Jianfu Inventor after: Huang Jiale Inventor after: Fan Zhiyang Inventor after: Lv Guoliang Inventor after: Zheng Haimu Inventor after: Zhang Zhibiao Inventor after: Yang Yating Inventor before: Huang Jianming |
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