CN109913050B - Concrete interface defoaming agent for plastering gypsum and preparation method and application thereof - Google Patents
Concrete interface defoaming agent for plastering gypsum and preparation method and application thereof Download PDFInfo
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Abstract
The invention discloses a concrete interface defoaming agent for plastering gypsum and a preparation method thereof, wherein the concrete interface defoaming agent comprises the following components in percentage by weight: 10-15% of styrene-acrylic emulsion, 5-10% of emulsified paraffin, 10-15% of butylbenzene emulsion, 0.05-0.15% of film-forming assistant, 0.05-0.2% of bactericide, 4-6% of hyperbranched polyesteramine solution with the concentration of 20%, 2-3% of PMMA (polymethyl methacrylate) nano-fiber, 0.05-0.15% of impregnating compound, 3-5% of nano-particles, 0.05-0.1% of high-molecular dispersing agent and the balance of PVA solution with the concentration of 5%. The defoaming agent prepared by the invention is used as the preorder step of plastering construction, so that the quantity of bubbles can be obviously reduced, the engineering quality is improved, the rework procedure is reduced, and the engineering cost is reduced.
Description
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to a concrete interface defoaming agent for plastering gypsum and a preparation method thereof.
Background
The plastering gypsum is used as an interior wall decoration and leveling material with wide application and unique performance, has the characteristics of light weight, fire prevention, heat preservation, heat insulation, green environmental protection and the like, also has a breathing function, and can adjust the humidity and improve the living environment. In recent years, the application research of plastering gypsum is in continuous and rapid progress, a series of products such as surface layer, bottom layer, light weight and heat insulation layer plastering gypsum and the like are developed, the market share is continuously expanded at present, and the development space and potential are huge.
The phenomenon of foaming of plastering gypsum in the construction process is serious, and the engineering quality is greatly influenced. In order to solve the problem, manual plastering construction usually adopts a secondary construction mode, mechanical spraying plastering construction usually paints a cement-based concrete interface agent on the surface of concrete, but the effects of the two are not obvious. Therefore, the research on the concrete interface defoaming agent special for the plastering gypsum has important significance for improving the engineering quality of the plastering gypsum and promoting the healthy development of the plastering gypsum industry.
Disclosure of Invention
The invention aims to provide a concrete interface defoaming agent for plastering gypsum, which can be used for improving the foaming problem in the plastering gypsum construction process.
The technical scheme of the invention is as follows: a concrete interface defoaming agent for plastering gypsum comprises the following components in percentage by weight: 10-15% of styrene-acrylic emulsion, 5-10% of emulsified paraffin, 10-15% of butylbenzene emulsion, 0.05-0.15% of film-forming assistant, 0.05-0.2% of bactericide, 4-6% of hyperbranched polyesteramine solution with the concentration of 20%, 2-3% of PMMA (polymethyl methacrylate) nano-fiber, 0.05-0.15% of impregnating compound, 3-5% of nano-particles, 0.05-0.1% of high-molecular dispersing agent and the balance of PVA solution with the concentration of 5%. The hyperbranched polyesteramine has a plurality of active terminal branches, and can be used as a medium to connect all components into a whole, thereby realizing synergistic interaction. The PMMA nano-fiber can be added to improve the bonding strength of the defoaming agent after film forming. The impregnating compound is used for carrying out surface infiltration activation treatment on the PMMA nano-fibers, and the fusion degree of the PMMA nano-fibers with other components is improved. The polymer dispersant improves the dispersibility of the nanometer particles through a steric hindrance stabilization mechanism, further eliminates the surface tension of the solution, and achieves the effect of auxiliary defoaming.
Further, the coalescent is a dodecyl ester or octyldodecyl myristate.
Furthermore, the impregnating compound is composed of a silane coupling agent, glycerol and a water-based transparent conductive liquid according to a mass ratio of 8:3:1, the silane coupling agent and the glycerol can be used for infiltrating and softening PMMA nanofibers, and the conductivity of the water-based transparent conductive liquid can be improved.
Further, the nanoparticles are styrene nanoparticles or polylactic acid nanoparticles. Compared with other solid nanometer particles, the nanometer particles adopting the high polymer material have higher compatibility with other high polymer components.
The invention also provides a preparation method of the concrete interface defoaming agent for plastering gypsum, which comprises the following steps:
(1) mixing 5 parts of PVA solid and 95 parts of deionized water, slowly heating to 80 ℃, stirring for about 20min, and cooling to room temperature to obtain a 5% PVA solution;
(2) immersing PMMA nano fibers into a 5% PVA solution, adding an impregnating agent, stirring for 20-30min at the temperature of 30-40 ℃, and carrying out infiltration treatment on the surfaces of the PMMA nano fibers to obtain a solution A;
(3) mixing 20 parts of hyperbranched polyesteramine and 80 parts of ethanol, slowly heating to 50 ℃, stirring for 10min, and cooling to room temperature to obtain a hyperbranched polyesteramine solution with the concentration of 20%;
(4) gradually dropping 20% hyperbranched polyesteramine solution into the solution A, stirring while dropping, and simultaneously inserting an electrode for auxiliary treatment, wherein the PMMA nanofiber has certain conductivity after being soaked by the impregnating compound containing the aqueous transparent conductive liquid, the electrode is electrified, and the hyperbranched polyesteramine is more easily guided to be uniformly connected in series on the PMMA nanofiber along with the direction of current to obtain a solution B;
(5) adding the nano particles and the polymer dispersant into the solution B, and ultrasonically stirring for 20-30min to obtain a solution C;
(6) adding the styrene-acrylic emulsion, the emulsified paraffin, the butylbenzene emulsion, the film forming additive and the bactericide into the solution C, mixing at normal temperature and normal pressure, and ultrasonically stirring for 10min to obtain the concrete interface defoaming agent.
Further, the speed of gradually dropping in the step (4) is 45 to 50 drops/min. The proper dropping speed can ensure that the hyperbranched polyesteramine is uniformly connected in series on the PMMA nanofiber, and the dropping at an excessively high or low speed can cause the accumulation and the agglomeration of the hyperbranched polyesteramine on the PMMA nanofiber.
Further, the electrifying voltage during the electrode auxiliary treatment in the step (4) is 24-36V. Too low a voltage leads to poor guiding results, whereas too high a voltage is prone to breakdown and the safety risk is greatly increased.
Further, the concrete interface defoaming agent is diluted with water according to the mass ratio of 1:3 before use, the diluted concrete interface defoaming agent is coated on the cleaned wall surface by using an ultrasonic double-wheel roller, and after 20min of film formation, plastering construction of light bottom layer plastering gypsum is carried out.
Further, the ultrasonic double-wheel roller comprises a brushing roller, an ultrasonic roller, a handle, a movable sleeve block, two support rods, an ultrasonic vibrating rod and an ultrasonic generator, wherein the left end and the right end of a rotating shaft of the brushing roller are connected with long vertical connecting rods, the left end and the right end of the rotating shaft of the ultrasonic roller are connected with short vertical connecting rods, the long vertical connecting rods and the short vertical connecting rods are hollow and are connected into an integral structure through springs, a transverse connecting rod is fixedly connected between the two long vertical connecting rods, the upper end of the handle is fixedly connected with the middle part of the transverse connecting rod through a universal swivel, the movable sleeve block is sleeved on the handle, the lower end of the movable sleeve block is provided with a handle, the two support rods are arranged, the upper end sleeves of the two support rods are sleeved on the outer sides of the left end and the right end of the rotating shaft of the ultrasonic roller, and is electrically connected with the ultrasonic vibrating rod.
The use method of the ultrasonic double-wheel roller comprises the following steps: before the use, an operator holds the handle by one hand and pulls the handle backwards by the other hand, the movable sleeve block is pulled backwards along the handle, the ultrasonic roller is driven by the support rod to move backwards, the spring extends to separate the ultrasonic roller from the painting roller, the ultrasonic roller is prevented from being immersed in the concrete interface defoaming agent together, the painting roller is ensured to be immersed in a barrel filled with the concrete interface defoaming agent independently, the handle is loosened, the spring rebounds, the ultrasonic roller is pulled to be close to the painting roller, the painting roller and the ultrasonic roller are tightly attached to the wall surface and move, the ultrasonic generator is opened, the painting roller uniformly paints the concrete interface defoaming agent on the wall surface, the ultrasonic roller carries out micro-vibration compaction and extension on the painted concrete interface defoaming agent under the action of an internal ultrasonic vibrating rod, and the bubble generation rate after the concrete interface defoaming agent forms a film can be further reduced, and the adhesive force of the concrete interface defoaming agent on the wall surface after film formation is improved.
Compared with the prior art, the invention has the beneficial effects that: the antifoaming agent of the invention is added with hyperbranched polyesteramine with a plurality of active end branches, and can be used as a medium to connect all components into a whole, thereby realizing synergistic interaction. The PMMA nanofiber is treated by a wetting agent containing a conductive liquid, and under the action of current generated by an electrode, hyperbranched polyesteramine is guided to be uniformly connected in series on the PMMA nanofiber, so that the internal sequence uniformity is improved, and the PMMA nanofiber can be used as a medium for connecting other components, so that the components are synergistic. In addition, the nano particles of the right polymer material are added in the invention, and compared with other solid nano particles, the nano particles adopting the polymer material have higher compatibility with other polymer components. And the polymer dispersant is used for improving the dispersibility of the nano particles, so that the surface tension of the solution is eliminated, and the effect of auxiliary defoaming is achieved. In a word, the defoaming agent prepared by the method is used as a preorder step of plastering construction, so that the quantity of bubbles can be obviously reduced, the engineering quality is improved, the rework procedure is reduced, and the engineering cost is reduced.
Drawings
FIG. 1 is a schematic structural view of an ultrasonic two-wheel drum of the present invention;
wherein, 1-a painting roller, 2-an ultrasonic roller, 3-a handle, 4-a movable sleeve block, 5-a support rod, 6-an ultrasonic vibrating rod, 7-an ultrasonic generator, 8-a long vertical connecting rod, 9-a short vertical connecting rod, 10-a spring, 11-a transverse connecting rod, 12-a universal swivel and 13-a handle.
Detailed Description
Example 1
A concrete interface defoaming agent for plastering gypsum comprises the following components in percentage by weight: 10% of styrene-acrylic emulsion, 5% of emulsified paraffin, 10% of styrene-butadiene emulsion, 0.05% of film-forming additive (decaglycol ester), 0.05% of bactericide, 4% of hyperbranched polyesteramine solution with the concentration of 20%, 2% of PMMA (polymethyl methacrylate) nano-fiber, 0.05% of impregnating compound, 3% of nano-particles (styrene nano-particles), 0.05% of high-molecular dispersing agent and the balance of PVA solution with the concentration of 5%. The hyperbranched polyesteramine has a plurality of active terminal branches, and can be used as a medium to connect all components into a whole, thereby realizing synergistic interaction. The PMMA nano-fiber can be added to improve the bonding strength of the defoaming agent after film forming. The impregnating compound is used for carrying out surface infiltration activation treatment on the PMMA nano-fibers, and the fusion degree of the PMMA nano-fibers with other components is improved. The polymer dispersant improves the dispersibility of the nanometer particles through a steric hindrance stabilization mechanism, further eliminates the surface tension of the solution, and achieves the effect of auxiliary defoaming. The impregnating compound consists of a silane coupling agent, glycerol and a water-based transparent conductive liquid according to a mass ratio of 8:3:1, the silane coupling agent and the glycerol can be used for impregnating and softening PMMA nanofibers, and the conductivity of the water-based transparent conductive liquid can be improved.
The preparation method of the concrete interface defoaming agent for plastering gypsum comprises the following steps:
(1) mixing 5 parts of PVA solid and 95 parts of deionized water, slowly heating to 80 ℃, stirring for about 20min, and cooling to room temperature to obtain a 5% PVA solution;
(2) immersing PMMA nano fibers into a 5% PVA solution, adding an impregnating agent, stirring for 20min at the temperature of 30 ℃, and carrying out infiltration treatment on the surfaces of the PMMA nano fibers to obtain a solution A;
(3) mixing 20 parts of hyperbranched polyesteramine and 80 parts of ethanol, slowly heating to 50 ℃, stirring for 10min, and cooling to room temperature to obtain a hyperbranched polyesteramine solution with the concentration of 20%;
(4) gradually dropping 20% hyperbranched polyesteramine solution into the solution A, stirring while dropping, and simultaneously inserting an electrode for auxiliary treatment, wherein the PMMA nanofiber has certain conductivity after being soaked by the impregnating compound containing the aqueous transparent conductive liquid, the electrode is electrified, and the hyperbranched polyesteramine is more easily guided to be uniformly connected in series on the PMMA nanofiber along with the direction of current to obtain a solution B; wherein the dropping speed gradually is 45 drops/min. The proper dropping speed can ensure that the hyperbranched polyesteramine is uniformly connected in series on the PMMA nanofiber, and the dropping at an excessively high or low speed can cause the accumulation and the agglomeration of the hyperbranched polyesteramine on the PMMA nanofiber. The energization voltage during the electrode auxiliary treatment was 24V. Too low a voltage leads to poor guiding results, whereas too high a voltage is prone to breakdown and the safety risk is greatly increased.
(5) Adding the nano particles and the polymer dispersant into the solution B, and ultrasonically stirring for 20min to obtain a solution C;
(6) adding the styrene-acrylic emulsion, the emulsified paraffin, the butylbenzene emulsion, the film forming additive and the bactericide into the solution C, mixing at normal temperature and normal pressure, and ultrasonically stirring for 10min to obtain the concrete interface defoaming agent.
Example 2
A concrete interface defoaming agent for plastering gypsum comprises the following components in percentage by weight: 12% of styrene-acrylic emulsion, 7.5% of emulsified paraffin, 13% of styrene-butadiene emulsion, 0.1% of film-forming additive (octyldodecanol myristate), 0.1% of bactericide, 5% of hyperbranched polyesteramine solution with the concentration of 20%, 2.5% of PMMA (polymethyl methacrylate) nano-fibers, 0.1% of impregnating compound, 4% of nano-particles (polylactic acid nano-particles), 0.08% of high-molecular dispersant and the balance of 5% of PVA solution. The hyperbranched polyesteramine has a plurality of active terminal branches, and can be used as a medium to connect all components into a whole, thereby realizing synergistic interaction. The PMMA nano-fiber can be added to improve the bonding strength of the defoaming agent after film forming. The impregnating compound is used for carrying out surface infiltration activation treatment on the PMMA nano-fibers, and the fusion degree of the PMMA nano-fibers with other components is improved. The polymer dispersant improves the dispersibility of the nanometer particles through a steric hindrance stabilization mechanism, further eliminates the surface tension of the solution, and achieves the effect of auxiliary defoaming. The impregnating compound consists of a silane coupling agent, glycerol and a water-based transparent conductive liquid according to a mass ratio of 8:3:1, the silane coupling agent and the glycerol can be used for impregnating and softening PMMA nanofibers, and the conductivity of the water-based transparent conductive liquid can be improved.
The preparation method of the concrete interface defoaming agent for plastering gypsum comprises the following steps:
(1) mixing 5 parts of PVA solid and 95 parts of deionized water, slowly heating to 80 ℃, stirring for about 20min, and cooling to room temperature to obtain a 5% PVA solution;
(2) immersing PMMA nano fibers into a 5% PVA solution, adding an impregnating agent, stirring for 25min at 35 ℃, and carrying out infiltration treatment on the surface of the PMMA nano fibers to obtain a solution A;
(3) mixing 20 parts of hyperbranched polyesteramine and 80 parts of ethanol, slowly heating to 50 ℃, stirring for 10min, and cooling to room temperature to obtain a hyperbranched polyesteramine solution with the concentration of 20%;
(4) gradually dropping 20% hyperbranched polyesteramine solution into the solution A, stirring while dropping, and simultaneously inserting an electrode for auxiliary treatment, wherein the PMMA nanofiber has certain conductivity after being soaked by the impregnating compound containing the aqueous transparent conductive liquid, the electrode is electrified, and the hyperbranched polyesteramine is more easily guided to be uniformly connected in series on the PMMA nanofiber along with the direction of current to obtain a solution B; wherein the dropping speed gradually is 47 drops/min. The proper dropping speed can ensure that the hyperbranched polyesteramine is uniformly connected in series on the PMMA nanofiber, and the dropping at an excessively high or low speed can cause the accumulation and the agglomeration of the hyperbranched polyesteramine on the PMMA nanofiber. The energization voltage during the electrode auxiliary treatment was 30V. Too low a voltage leads to poor guiding results, whereas too high a voltage is prone to breakdown and the safety risk is greatly increased.
(5) Adding the nano particles and the polymer dispersant into the solution B, and ultrasonically stirring for 25min to obtain a solution C;
(6) adding the styrene-acrylic emulsion, the emulsified paraffin, the butylbenzene emulsion, the film forming additive and the bactericide into the solution C, mixing at normal temperature and normal pressure, and ultrasonically stirring for 10min to obtain the concrete interface defoaming agent.
Example 3
A concrete interface defoaming agent for plastering gypsum comprises the following components in percentage by weight: 15% of styrene-acrylic emulsion, 10% of emulsified paraffin, 15% of styrene-butadiene emulsion, 0.15% of film-forming additive (octyldodecanol myristate), 0.2% of bactericide, 6% of hyperbranched polyesteramine solution with the concentration of 20%, 3% of PMMA (polymethyl methacrylate) nano-fibers, 0.15% of impregnating compound, 5% of nano-particles (polylactic acid nano-particles), 0.1% of high-molecular dispersing agent and the balance of 5% of PVA solution. The hyperbranched polyesteramine has a plurality of active terminal branches, and can be used as a medium to connect all components into a whole, thereby realizing synergistic interaction. The PMMA nano-fiber can be added to improve the bonding strength of the defoaming agent after film forming. The impregnating compound is used for carrying out surface infiltration activation treatment on the PMMA nano-fibers, and the fusion degree of the PMMA nano-fibers with other components is improved. The polymer dispersant improves the dispersibility of the nanometer particles through a steric hindrance stabilization mechanism, further eliminates the surface tension of the solution, and achieves the effect of auxiliary defoaming. The impregnating compound consists of a silane coupling agent, glycerol and a water-based transparent conductive liquid according to a mass ratio of 8:3:1, the silane coupling agent and the glycerol can be used for impregnating and softening PMMA nanofibers, and the conductivity of the water-based transparent conductive liquid can be improved.
The preparation method of the concrete interface defoaming agent for plastering gypsum comprises the following steps:
(1) mixing 5 parts of PVA solid and 95 parts of deionized water, slowly heating to 80 ℃, stirring for about 20min, and cooling to room temperature to obtain a 5% PVA solution;
(2) immersing PMMA nano fibers into a 5% PVA solution, adding an impregnating agent, stirring for 30min at 40 ℃, and carrying out infiltration treatment on the surface of the PMMA nano fibers to obtain a solution A;
(3) mixing 20 parts of hyperbranched polyesteramine and 80 parts of ethanol, slowly heating to 50 ℃, stirring for 10min, and cooling to room temperature to obtain a hyperbranched polyesteramine solution with the concentration of 20%;
(4) gradually dropping 20% hyperbranched polyesteramine solution into the solution A, stirring while dropping, and simultaneously inserting an electrode for auxiliary treatment, wherein the PMMA nanofiber has certain conductivity after being soaked by the impregnating compound containing the aqueous transparent conductive liquid, the electrode is electrified, and the hyperbranched polyesteramine is more easily guided to be uniformly connected in series on the PMMA nanofiber along with the direction of current to obtain a solution B; wherein the dropping speed gradually is 50 drops/min. The proper dropping speed can ensure that the hyperbranched polyesteramine is uniformly connected in series on the PMMA nanofiber, and the dropping at an excessively high or low speed can cause the accumulation and the agglomeration of the hyperbranched polyesteramine on the PMMA nanofiber. The energization voltage during the electrode auxiliary treatment was 36V. Too low a voltage leads to poor guiding results, whereas too high a voltage is prone to breakdown and the safety risk is greatly increased.
(5) Adding the nano particles and the polymer dispersant into the solution B, and ultrasonically stirring for 20-30min to obtain a solution C;
(6) adding the styrene-acrylic emulsion, the emulsified paraffin, the butylbenzene emulsion, the film forming additive and the bactericide into the solution C, mixing at normal temperature and normal pressure, and ultrasonically stirring for 10min to obtain the concrete interface defoaming agent.
Example 4
In the embodiments 1-3, the concrete interface defoaming agent is diluted with water according to the mass ratio of 1:3 before use, the diluted concrete interface defoaming agent is coated on the cleaned wall surface by using an ultrasonic double-wheel roller, and after 20min of film formation, plastering construction of light bottom layer plastering gypsum is carried out.
As shown in figure 1, the ultrasonic double-wheel roller comprises a brushing roller 1, an ultrasonic roller 2, a handle 3, a movable sleeve block 4, support rods 5, an ultrasonic vibrating rod 6 and an ultrasonic generator 7, wherein the left end and the right end of a rotating shaft of the brushing roller 1 are connected with long vertical connecting rods 8, the left end and the right end of the rotating shaft of the ultrasonic roller 2 are connected with short vertical connecting rods 9, the long vertical connecting rods 8 and the short vertical connecting rods 9 are hollow and are connected into an integral structure through springs 10, a transverse connecting rod 11 is fixedly connected between the two long vertical connecting rods 8, the upper end of the handle 3 is fixedly connected with the middle part of the transverse connecting rod 11 through a universal swivel 12, the movable sleeve block 4 is sleeved on the handle 3, the lower end of the movable sleeve block 4 is provided with a handle 13, the number of the support rods 5 is two, the upper ends of the two support rods 5 are sleeved on the, the ultrasonic vibrating rod 6 is positioned inside the ultrasonic roller 2, and the ultrasonic generator 7 is positioned above the movable sleeve block 4 and is electrically connected with the ultrasonic vibrating rod 6.
The use method of the ultrasonic double-wheel roller comprises the following steps: before use, an operator holds the handle 3 with one hand and pulls the handle 13 backwards with the other hand, pulls the movable sleeve block 4 backwards along the handle 3, meanwhile, the support rod 5 drives the ultrasonic roller 2 to move backwards, the spring 10 extends to separate the ultrasonic roller 2 from the painting roller 1, so as to prevent the ultrasonic roller 2 from being immersed in the concrete interface defoaming agent together, ensure that the painting roller 1 is immersed in a barrel filled with the concrete interface defoaming agent independently, the handle 13 is loosened, the spring 10 rebounds, the ultrasonic roller 2 is pulled to be close to the painting roller 1, then the painting roller 1 and the ultrasonic roller 2 are tightly attached to the wall surface and move, the ultrasonic generator 7 is opened, the painting roller 1 uniformly paints the concrete interface defoaming agent on the wall surface, the ultrasonic roller 2 conducts micro-vibration compaction and extension on the painted concrete interface defoaming agent under the action of the ultrasonic vibrating rod 6 inside, and the generation rate of bubbles after the concrete interface defoaming agent is formed into a film can be further reduced, and the adhesive force of the concrete interface defoaming agent on the wall surface after film formation is improved.
Test examples
5 groups were prepared with an area of 4m2The surface of a base layer of the square concrete test wall is cleaned, the 1 st group to the 3 rd group are coated with the interface defoaming agent diluted in the embodiments 1 to 3 of the invention, after the film is formed for about 20min, the ultrasonic double-wheel roller of the invention is utilized to carry out plastering construction of light bottom plastering gypsum; the 4 th group is coated with the interface defoaming agent diluted by the defoaming agent in the embodiment 2 of the invention, and after the film is formed for about 20min, the plastering construction of the light bottom layer plastering gypsum is carried out by utilizing a common roller sold in the market; and the 5 th group directly carries out plastering construction of the light bottom layer plastering gypsum in the same batch. The number of bubbles and the tensile bond strength of test 7d were observed separately. The results of the experiment are shown in table 2.
TABLE 2 light bottom plastering Gypsum construction test results
| Number of bubbles | 7d tensile bond Strength/ | |
| Group | ||
| 1 | Is rarely used | 0.37 |
| |
Is rarely used | 0.37 |
| |
Is rarely used | 0.37 |
| Group 4 | Is less | 0.36 |
| |
Much more | 0.39 |
Test results show that when the concrete interface defoaming agent is used for coating the plastering gypsum on the surface of a concrete base layer and is matched with the ultrasonic double-wheel roller for coating, the number of bubbles of the light-weight bottom plastering gypsum can be obviously reduced, and the tensile bonding strength is not obviously influenced.
The above description of the embodiments is only intended to illustrate the method of the invention and its core idea. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications will also fall into the protection scope of the claims of the present invention.
Claims (7)
1. The concrete interface defoaming agent for plastering gypsum is characterized by comprising the following components in percentage by weight: 10-15% of styrene-acrylic emulsion, 5-10% of emulsified paraffin, 10-15% of butylbenzene emulsion, 0.05-0.15% of film-forming auxiliary agent, 0.05-0.2% of bactericide, 4-6% of hyperbranched polyesteramine solution with the concentration of 20%, 2-3% of PMMA (polymethyl methacrylate) nano-fiber, 0.05-0.15% of impregnating compound, 3-5% of nano-particles, 0.05-0.1% of high-molecular dispersing agent and the balance of PVA solution with the concentration of 5%; wherein the nano particles are styrene nano particles or polylactic acid nano particles.
2. The concrete interface defoamer for plastering gypsum as claimed in claim 1, wherein the film forming aid is dodecyl ester or octyldodecyl myristate.
3. The preparation method of the concrete interface defoamer for plastering gypsum as claimed in claim 1 or 2, wherein the preparation method comprises the following steps:
(1) mixing 5 parts of PVA solid and 95 parts of deionized water, slowly heating to 80 ℃, stirring for 20min, and cooling to room temperature to obtain a 5% PVA solution;
(2) immersing the PMMA nano-fiber into the 5% PVA solution, adding the impregnating agent, stirring for 20-30min at the temperature of 30-40 ℃, and carrying out infiltration treatment on the surface of the PMMA nano-fiber to obtain a solution A;
(3) mixing 20 parts of hyperbranched polyesteramine and 80 parts of ethanol, slowly heating to 50 ℃, stirring for 10min, and cooling to room temperature to obtain a hyperbranched polyesteramine solution with the concentration of 20%;
(4) gradually dropping the 20% hyperbranched polyesteramine solution into the solution A, stirring while dropping, inserting an electrode for auxiliary treatment, and uniformly connecting the hyperbranched polyesteramine in series on the PMMA nanofiber to obtain a solution B;
(5) adding the nano particles and a polymer dispersant into the solution B, and ultrasonically stirring for 20-30min to obtain a solution C;
(6) and adding the styrene-acrylic emulsion, the emulsified paraffin, the butylbenzene emulsion, the film forming additive and the bactericide into the solution C, mixing at normal temperature and normal pressure, and ultrasonically stirring for 10min to obtain the concrete interface defoaming agent.
4. The method for preparing a concrete interface antifoaming agent for plastering gypsum as claimed in claim 3, wherein the gradual dropping speed in the step (4) is 45 to 50 drops/min.
5. The method for preparing the concrete interface antifoaming agent for plastering gypsum as claimed in claim 3, wherein the energizing voltage for the auxiliary treatment of the electrode in the step (4) is 24-36V.
6. The application of the concrete interface defoaming agent prepared by the preparation method of claim 3 is characterized in that the concrete interface defoaming agent is diluted with water according to the mass ratio of 1:3 before use, the diluted concrete interface defoaming agent is coated on the cleaned wall surface by using an ultrasonic double-wheel roller, and after 20min of film formation, plastering construction of light bottom layer plastering gypsum is carried out.
7. The application of claim 6, characterized in that the ultrasonic double-wheel roller comprises a painting roller (1), an ultrasonic roller (2), a handle (3), a movable sleeve block (4), a support rod (5), an ultrasonic vibrating rod (6) and an ultrasonic generator (7), wherein the left end and the right end of the rotating shaft of the painting roller (1) are connected with long vertical connecting rods (8), the left end and the right end of the rotating shaft of the ultrasonic roller (2) are connected with short vertical connecting rods (9), the long vertical connecting rods (8) and the short vertical connecting rods (9) are hollow and are connected into an integral structure through springs (10), a transverse connecting rod (11) is fixedly connected between the two long vertical connecting rods (8), the upper end of the handle (3) is fixedly connected with the middle part of the transverse connecting rod (11) through a universal rotating head (12), and the movable sleeve block (4) is sleeved on the handle (3), and activity set piece (4) lower extreme is equipped with handle (13), bracing piece (5) are two altogether, and the both ends outside about the axis of rotation of ultrasonic drum (2) is established to the last pot head of two bracing pieces (5), the lower extreme and the activity set piece (4) both sides fixed connection of bracing piece (5), supersound vibrating rod (6) are located inside ultrasonic drum (2), supersonic generator (7) are located activity set piece (4) top to with supersound vibrating rod (6) electric connection.
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| CN116087478A (en) * | 2023-04-07 | 2023-05-09 | 四川蜀道建筑科技有限公司 | Visual concrete slump detection equipment and method |
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