Method for preparing concrete super-hydrophobic surface through microorganisms
By applying cyanobacterial culture solution to the concrete surface and then smoothing and mineralizing it, the high cost and difficulty of preparing superhydrophobic concrete structures have been solved, achieving low-cost and high-efficiency hydrophobic effects, which are applicable to fields such as construction, automobiles, and electronic equipment.
Patent Information
- Application Number
- CN202511237813.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-01
- Publication Date
- 2025-12-09
AI Technical Summary
Existing technologies for preparing superhydrophobic concrete structures suffer from high costs, difficult implementation, and low photothermal efficiency, especially in environments with high humidity and large temperature differences where it is difficult to maintain superhydrophobic properties.
A cyanobacterial culture solution is applied to the concrete surface, and a superhydrophobic surface is formed through smoothing and mineralization treatment. The acidic compounds secreted by the cyanobacteria decompose the cement, increasing the calcium content. Combined with carbon dioxide curing and air blowing treatment, a hydrophobic layer is formed.
It has achieved low-cost, easy-to-implement, and highly photothermal-efficient preparation of superhydrophobic concrete surfaces, which can be stably applied at room temperature, reducing construction risks and improving hydrophobic effects.
Smart Images
Figure CN121085658A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of microorganism preparation of concrete, and particularly relates to a method for preparing a super-hydrophobic surface of concrete by microorganisms. BACKGROUND
[0002] A hydrophobic surface refers to a surface with extremely strong anti-wetting ability, similar to the surface of a lotus leaf, so that water flow automatically accumulates or flows on the surface. The hydrophobic surface has multiple functions such as dryness, liquid resistance and air permeability, and has a wide application prospect in the fields of biomedicine, aerospace, construction and other high-tech fields, and people's research on the hydrophobicity of concrete is deepening.
[0003] Surface hydrophobic technology is a basic technology with high practical value and is widely used. Hydrophobic coatings have excellent water resistance, stain resistance, corrosion resistance and other characteristics, and are widely used in many fields.
[0004] In the field of construction, it can be coated on the surface of walls and roofs to effectively prevent rainwater from penetrating, reduce mold growth and structural damage caused by moisture, and reduce cleaning and maintenance costs. In the automotive industry, it can be applied to vehicle bodies to allow rainwater to quickly slide off, reduce stain adhesion, and improve driving safety and vehicle aesthetics. In the field of electronic equipment, hydrophobic coatings can provide waterproof protection for circuit boards, sensors and other devices to prevent short circuit failures caused by liquid intrusion. In addition, hydrophobic coatings also play an important role in medical devices, shipbuilding, textile fabrics and other industries, such as preventing bacteria from growing on the surface of medical devices, enhancing the corrosion resistance of ship hulls, and making textiles waterproof and breathable.
[0005] With the continuous development of material technology, the performance of hydrophobic coatings continues to be optimized, and their application range is further expanding, providing strong support for the technological upgrading and functional improvement of various industries.
[0006] By designing hydrophobic coatings with different structures, chemistry and physical characteristics, new additional functions can be provided to solid materials, especially the rapidly growing demand for hydrophobic coatings in modern industry, which promotes the development of functionalized hydrophobic coatings. Super-hydrophobic coatings are a new type of surface technology developed on this basis;
[0007] In order to maintain the super-hydrophobic properties of super-hydrophobic materials in high humidity and large room temperature difference environments, nano-scale super-hydrophobic surfaces, hydrophilic and hydrophobic composite super-hydrophobic surfaces and other super-hydrophobic structures have been prepared, but there are defects of passive anti-condensation failure. In order to overcome the aforementioned passive anti-condensation failure defects, a super-hydrophobic structure is prepared using a photothermal material, which can achieve active anti-condensation, but the preparation cost is high, and the particle size of the internal material needs to be controlled when the super-hydrophobic structure of the concrete is prepared by the photothermal method, which is difficult to implement. Therefore, how to obtain an ideal material that is cheap, easy to prepare and has high photothermal efficiency is a difficult problem. SUMMARY
[0008] The present application aims to provide a method for preparing a super-hydrophobic surface of concrete by microorganisms, which is low in cost, easy to implement and high in photo-thermal efficiency.
[0009] To solve the above technical problems, the present application provides the following technical solutions:
[0010] The present application provides a method for preparing a super-hydrophobic surface of concrete by microorganisms, comprising the following steps:
[0011] The cyanobacteria culture solution is applied to the surface of the concrete, and after mixing, a cyanobacteria concrete is obtained.
[0012] The surface of the cyanobacteria concrete is subjected to smoothing treatment and mineralization treatment, so as to obtain a super-hydrophobic surface of concrete.
[0013] Preferably, the method for preparing the cyanobacteria culture solution comprises inoculating cyanobacteria in a culture medium for culture, so as to obtain the cyanobacteria culture solution.
[0014] Preferably, the culture temperature is 28-35℃, the culture time is 24h, and sufficient light is required during the culture process.
[0015] Preferably, the depth of the culture medium in the culture vessel is 8-12cm.
[0016] Preferably, the cyanobacteria culture solution is applied completely within 30s.
[0017] Preferably, the mixing mode comprises stirring.
[0018] Preferably, the smoothing treatment makes the surface of the concrete smooth.
[0019] Preferably, the mineralization treatment temperature is 30℃.
[0020] Preferably, the mineralization treatment mode comprises carbon dioxide curing, and air blowing is required during the carbon dioxide curing process.
[0021] Preferably, the air blowing time is 30min.
[0022] The beneficial effects of this invention are as follows: This invention provides a method for preparing a superhydrophobic concrete surface using microorganisms, comprising the following steps: applying a cyanobacterial culture solution to a concrete surface, mixing it, and obtaining cyanobacterial concrete; and performing a smoothing and mineralization treatment on the surface of the cyanobacterial concrete to obtain a superhydrophobic concrete surface. The cyanobacteria of this invention are widely distributed, easy to cultivate, and have extremely low cultivation costs. This invention brings concrete into contact with cyanobacteria, causing the cyanobacteria to secrete a large amount of acidic compounds, decomposing the cement in the concrete, increasing the content of calcifications within the concrete, facilitating the formation of a mineralized layer on the concrete surface, and ensuring the hydrophobic effect of the concrete. Simultaneously, the smoothing treatment of the concrete surface makes it glossy, which automatically improves the inherent hydrophobicity of the concrete. Furthermore, the mineralization treatment of the concrete surface accelerates the drying of the concrete surface, forming a superhydrophobic structure. Attached Figure Description
[0023] Figure 1 Flowchart of the preparation process for microbial superhydrophobic concrete surfaces. Detailed Implementation
[0024] This invention provides a method for preparing superhydrophobic concrete surfaces using microorganisms, comprising the following steps:
[0025] Cyanobacterial culture solution is applied to the concrete surface and mixed to obtain cyanobacterial concrete.
[0026] The surface of the cyanobacterial concrete was smoothed and mineralized to obtain a superhydrophobic concrete surface.
[0027] As an optional embodiment, the method for preparing the cyanobacterial culture medium of the present invention includes: inoculating cyanobacteria into a culture medium and culturing them to obtain a cyanobacterial culture medium. As an optional embodiment, the culturing temperature of the present invention is 28-35°C, more preferably 30°C. The culturing time of the present invention is 24 hours, and sufficient sunlight is maintained during the culturing process.
[0028] As an optional implementation, the depth of the culture medium in the container used for cultivation according to the present invention is 8-12 cm, more preferably 10 cm. The container used for cultivation according to the present invention includes a petri dish. The petri dish is kept open during cultivation to ensure sufficient oxygen and light. The present invention can simultaneously cultivate multiple petri dishes to obtain a large number of cyanobacteria. The present invention does not have a specific limitation on the source of the cyanobacteria; conventional cyanobacteria can be used. For example, the present invention can use a micropipette separation method to separate cyanobacteria from freshwater and seawater, and after separation, the concentration of cyanobacteria in the petri dish needs to be detected to ensure that the concentration meets the standard.
[0029] The cyanobacteria can survive in fresh water and sea water, and are extracted by a micro-pipette separation method, and the culture process does not need to pay attention to temperature control, the growth temperature of the cyanobacteria is wide, the cyanobacteria can be cultured in a large amount at the same time, and the culture cost of the microorganism can be greatly reduced, so that the convenience and stability of the implementation of the technical scheme of the application are ensured.
[0030] The cyanobacteria culture solution is obtained, the cyanobacteria culture solution is applied to the surface of the concrete, and after mixing, the cyanobacteria concrete is obtained.As an optional embodiment, the cyanobacteria culture solution is completely applied in 30s.In the application, the cyanobacteria culture solution is applied to the surface of the concrete, so that the cyanobacteria culture solution is quickly and uniformly applied to the surface of the concrete.As an optional embodiment, the application discloses a concrete finishing machine.The concrete finishing machine is a lifting type automatic finishing machine.After the cyanobacteria culture solution is applied, mixing is performed.The mixing method includes stirring.The stirring method includes the following steps: the cyanobacteria are added into the concrete, and then stirring is performed to obtain the cyanobacteria concrete.The stirring equipment includes an open and light-transmitting stirring equipment, which can ensure that the cyanobacteria automatically absorb carbon dioxide in the air.The open stirring machine is used for rapid and automatic discharging, and the forklift is used for automatic receiving and feeding.
[0031] The stirring parameters are set to facilitate the temperature increase of the cyanobacteria added into the concrete, the cyanobacteria secrete acid substances when the temperature increases, the cement in the concrete can be decomposed, so that the cement content in the concrete is reduced, and the generation of calcium compounds in the concrete is ensured.After the concrete is mixed with the cyanobacteria, the concrete is quickly taken out for use, so that the storage time of the cyanobacteria under light shielding conditions is shortened.
[0032] The cyanobacteria concrete is obtained, the surface of the cyanobacteria concrete is smoothed and mineralized to obtain a super-hydrophobic surface of the concrete.The cyanobacteria concrete needs to be quickly used to shorten the storage time of the cyanobacteria under light shielding conditions.Before use, the surface of the concrete is smoothed so that the surface of the concrete is smooth, and the hydrophobic effect of the concrete itself can be automatically improved.The smoothing treatment is completed by using the concrete automatic finishing machine.The automatic finishing machine treatment can shorten the construction time of the concrete, reduce the temperature drop speed of the concrete, ensure that the cyanobacteria secrete more organic acid substances, improve the hydrophobic effect, and avoid the influence of manual finishing on the application effect.
[0033] The mineralization treatment of the present application comprises room temperature mineralization treatment. The room temperature mineralization treatment of the present application comprises carbon dioxide curing, and air blowing is required during the carbon dioxide curing. The temperature of the room temperature mineralization treatment of the present application is 30℃. The air blowing time of the present application is 30min. The present application uses a fan to rapidly blow the concrete surface, and needs to ensure the uniformity of the concrete surface blowing, shorten the time required for the solidification of the concrete, and avoid the dry cracking of the concrete, and improve the hydrophobic effect of the concrete. At the same time, blowing can make the carbon dioxide in the air contact with the cyanobacteria, so that the carbon dioxide contacts with the cyanobacteria secretions to form calcium carbonate. The amount of acid compounds secreted by cyanobacteria at room temperature is very large, which can reach more than half of its own secretions, which can make the cement in the concrete fully decomposed, improve the content of calcareous substances in the concrete, and is beneficial to the formation of the mineralized hydrophobic layer. Uniform blowing is required during the blowing of the concrete, which can avoid dry cracking, and the rapid cooling of the concrete can be realized by the spraying of hot water, which is convenient for the detection of the hydrophobic structure.
[0034] After obtaining the super-hydrophobic surface of the concrete, the hydrophobic effect of the concrete surface needs to be detected in time. The method for preparing the super-hydrophobic surface of the concrete by the microorganism of the present application is simple, low in cost and easy to implement. The technical scheme of the present application applies a leveling machine, a mixer and a fan, which can ensure the convenience of the implementation of the method, avoid the occurrence of unexpected accidents, and can be implemented under room temperature conditions, so as to ensure the stable implementation of the technical scheme and realize large-scale concrete construction.
[0035] In order to further illustrate the present application, the technical scheme provided by the present application is described in detail below in combination with the drawings and examples, but they should not be understood as limiting the scope of protection of the present application.
[0036] Example 1
[0037] A method for preparing a super-hydrophobic surface of concrete by microorganisms, comprising the following steps:
[0038] Step 1: Preparation of microorganisms
[0039] The cyanobacteria are extracted by micro-pipette separation method, placed in a transparent culture dish, and culture solution containing inorganic salts and trace elements is added to the inside of the transparent culture dish. The culture dish is kept under sufficient light during the culture period, and is cultured for about 24 hours under this condition.
[0040] In step 1, the concentration of cyanobacteria in the culture dish needs to be detected after the separation is completed to ensure that the concentration of cyanobacteria meets the standard.
[0041] In step 1, when the cyanobacteria are cultured in a transparent culture dish, the cyanobacteria are kept in sufficient light, and the culture dish is in an open state, the depth of the culture solution in the culture dish is 10 cm, and the culture temperature is about 30°C; a plurality of culture dishes can be used simultaneously for cyanobacteria culture.
[0042] Step 2: mixing of hydrophobic materials
[0043] The concrete with uniform internal material distribution is selected, and the cyanobacteria solution obtained in step 1 is applied to the surface of the concrete. The cyanobacteria should be quickly applied to the surface of the concrete, and the mixing and application should be performed for about 30 s to obtain the applied concrete.
[0044] Step 3: preparation of microbial concrete
[0045] During the mechanical stirring of the concrete, it is necessary to ensure that the concrete is at room temperature, and the concrete room temperature needs to be quickly used; the applied concrete obtained in step 2 is placed in a stirrer for stirring. The open stirrer is used for quick automatic discharge, and the forklift is used for automatic receiving and feeding.
[0046] The stirring temperature of the concrete is also ensured to facilitate the heating of the cyanobacteria added inside. When the cyanobacteria are heated, they will secrete acid substances, which can decompose the cement in the concrete, thereby reducing the cement content in the concrete and increasing the calcium compound content in the concrete.
[0047] After the concrete and cyanobacteria are mixed, they need to be quickly removed for use, which shortens the storage time of the cyanobacteria under light shielding conditions. The mixture of the concrete and the cyanobacteria is referred to as a concrete-cyanobacteria mixture.
[0048] Step 4: microbial aggregation on the surface of the concrete
[0049] The concrete-cyanobacteria mixture obtained in step 3 needs to be quickly used, and the surface of the concrete is smoothed to form a smooth surface. This process is completed by a concrete automatic screed machine. In step 4, the concrete needs to be quickly and uniformly applied, which is quickly completed by a lifting type automatic screed machine to shorten the construction time of the concrete, slow down the temperature drop speed of the concrete, and avoid the influence of manual operation. In step 4, the surface of the concrete is treated to form a smooth surface, which can automatically enhance the hydrophobic effect of the concrete.
[0050] Step 5: room temperature mineralization of the concrete
[0051] When the carbon dioxide curing system is used, a fan is used to quickly blow air on the surface of the concrete for 30 min. Uniform blowing is used to avoid dry cracking of the concrete. The uniformity of the air blowing on the surface of the concrete needs to be ensured to shorten the time required for the solidification of the concrete and improve the hydrophobic effect of the concrete. The process for preparing a super-hydrophobic surface of microbial concrete is as follows:Figure 1 As shown.
[0052] In conclusion, the application uses blue-green algae to prepare concrete super-hydrophobic surface, which has low cost, easy implementation and good hydrophobic effect.
[0053] Although the above embodiment has made a detailed description of the application, it is only a part of the embodiment, not all the embodiments, and people can also obtain other embodiments according to the embodiment without creativity, which belongs to the protection scope of the application.
Claims
1. A method for preparing superhydrophobic concrete surfaces using microorganisms, characterized in that, Includes the following steps: Cyanobacterial culture solution is applied to the concrete surface and mixed to obtain cyanobacterial concrete. The surface of the cyanobacterial concrete was smoothed and mineralized to obtain a superhydrophobic concrete surface.
2. The method according to claim 1, characterized in that, The method for preparing the cyanobacterial culture medium includes: inoculating cyanobacteria into a culture medium and culturing them to obtain a cyanobacterial culture medium.
3. The method according to claim 2, characterized in that, The culture temperature is 28–35°C, the culture time is 24 hours, and sufficient light is maintained during the culture process.
4. The method according to claim 2 or 3, characterized in that, The depth of the culture medium in the container used for the culture application is 8–12 cm.
5. The method according to claim 1, characterized in that, The cyanobacterial culture medium should be spread completely within 30 seconds.
6. The method according to claim 1, characterized in that, The mixing method includes stirring.
7. The method according to claim 1, characterized in that, The smoothing treatment makes the concrete surface smooth.
8. The method according to claim 1, characterized in that, The mineralization treatment temperature is 30°C.
9. The method according to claim 1 or 8, characterized in that, The mineralization process includes carbon dioxide curing, which requires air blowing.
10. The method according to claim 9, characterized in that, The blowing time is 30 minutes.