CN111826034A - Humidity-adjusting paint and method for producing the same - Google Patents

Abstract

The invention discloses a humidity-controlling coating and a manufacturing method thereof, wherein the humidity-controlling coating comprises a functional material with the weight percentage of 30%, a mixing agent with the weight percentage of 62.5-70% and sodium silicate with the weight percentage of 2.5-7.5%; wherein the functional material comprises 20-60% by weight of inorganic sludge, 35-65% by weight of semi-hydrated gypsum and at least 5% by weight of inorganic mineral, and the inorganic sludge contains at least 90% by weight of amorphous silicon dioxide; in addition, the mixture comprises a water-soluble resin and water, and the mixing ratio of the water-soluble resin to the water is 1 (2-3); therefore, the humidity-adjusting coating prepared from the materials has high moisture absorption and release effects and high antibacterial rate, solves the problem of burying inorganic sludge, effectively converts waste into high-value materials, and effectively achieves the effect of recycling resources.

Description

Humidity-adjusting paint and method for producing the same

technical field

The invention relates to a paint ratio and a manufacturing method thereof, in particular to a humidity-controlling paint and a manufacturing method thereof.

Background technique

In recent years, the influence of humidity on the indoor environment has gradually been paid attention to. Relative humidity has a direct impact on the occupants of the environment. For example, too low humidity will not only make the occupant's respiratory system feel dry and uncomfortable, but also cause epidemics. The humidity range with high activity of cold virus is easy to make people infected and sick, and low humidity is also prone to static electricity; on the contrary, when the humidity is too high, it is easy to promote the growth of biological pollution such as microorganisms and dust mites in the indoor environment, and dust mites are easy to survive When the relative humidity is between 50 and 80%, and the humidity exceeds 80%, the probability of polluting microorganisms will increase. These biological pollutants will indirectly cause discomfort to the occupants, and even cause respiratory diseases, asthma, allergies, fatigue. Health problems such as headaches.

Therefore, the humidity inside the house is very important. In the face of humidity problems, the active methods are mainly to use dehumidifiers, desiccants, dehumidifiers, or use equipment such as air conditioners. In addition, passive parts are mainly used for the adjustment of building materials. Wet materials, some people also study coatings that can adjust humidity, and these coatings that can adjust humidity mainly use zeolite, sepiolite or diatomaceous earth, and some people use polymer water-absorbing materials, mineral materials, such as kaolin, silica , lime, bauxite, gravel, cement, etc. are added with plant fibers, crop wastes and activated carbon, etc., and the moisture absorption and desorption performance of the moisture-conditioning materials is high, and many research results have not been converted into products to flow to the market. , so what kind of material is used can achieve better benefits.

In addition, inorganic wastes (such as incineration ash, water purification sludge, waste diatomite and coal ash, etc.) are produced in a large amount in Taiwan every year, and their recycling rate is low, and the components are mainly inorganic, which cannot be used. Incineration treatment, so most of them will be disposed of by burial. Such a large amount of waste entering the landfill will inevitably speed up the saturation of the landfill. If it is not properly buried, it will even have a serious impact on the ecological environment. Recycling inorganic waste as materials can achieve the goal of a resource recycling society.

SUMMARY OF THE INVENTION

Therefore, the purpose of the present invention is to provide a humidity-conditioning paint and a manufacturing method thereof, which can convert wastes into humidity-conditioning paints, effectively reduce the impact of wastes on the environment, and at the same time, can produce better humidity-conditioning effects. The best humidity control paint.

The first object of the present invention is to provide a humidity control coating, which comprises a functional material of 30% by weight, a mixture containing 62.5% to 70% by weight, and a sodium silicate containing 2.5% to 7.5% by weight ; Wherein, the functional material includes a 20-60% by weight inorganic sludge, a 35-65% hemihydrate gypsum, an inorganic mineral at least 5% by weight, and the above-mentioned inorganic sludge contains at least 90% In addition, the mixture contains water-soluble resin and water, and the mixing ratio of the water-soluble resin and the water is 1:(2-3).

As a further improvement of the present invention, the water-soluble resin is an acrylic resin.

As a further improvement of the present invention, the functional material may further contain 10-30% by weight of the waste catalyst of petroleum refining and chemical cracking.

As a further improvement of the present invention, after the inorganic sludge has been dried and ground into powder, it has passed through the #100 sieve.

The second object of the present invention is to provide a humidity-adjusting coating, which comprises a functional material of 30% by weight, a mixture containing 62.5% to 70% by weight, and a sodium silicate containing 2.5% to 7.5% by weight ; Wherein, the functional material includes a 20-60% by weight inorganic sludge, a 35-65% hemihydrate gypsum, an inorganic mineral at least 5% by weight, and the above-mentioned inorganic sludge contains at least 90% In addition, the mixture contains water-soluble paint and water, and the mixing ratio of the water-soluble paint and the water is 1:(2-3).

The 3rd object of the present invention is to provide a kind of manufacture method of humidity control paint, it comprises:

A material preparation step: it is equipped with a functional material containing 30% by weight, a mixture containing 62.5-70% by weight, and a sodium silicate containing 2.5%-7.5% by weight; wherein, the functional material includes: 20-60% by weight of inorganic sludge, 35-65% by weight of hemihydrate gypsum, and at least 5% by weight of inorganic minerals, and the above-mentioned inorganic sludge contains at least 90% by weight of amorphous II silicon oxide; in addition, the mixture contains a water-soluble resin and water, and the mixing ratio of the water-soluble resin and the water is 1:(2-3); and

A mixing step: firstly, the functional materials belonging to the solid mixture are mixed uniformly, and the other mixture is firstly mixed with the sodium silicate and water to form a sodium silicate solution, and then the water-soluble resin is added to the silicon After the sodium solution is stirred and dissolved evenly, the functional material and the mixture are mixed and stirred to complete the humidity control coating.

As a further improvement of the present invention, the water-soluble resin is an acrylic resin.

As a further improvement of the present invention, in the material preparation step, sodium silicate with 2.5% to 7.5% by weight is further prepared, and the sodium silicate is first stirred and mixed with water to form a sodium silicate solution, and then the water-soluble resin Add sodium silicate solution.

As a further improvement of the present invention, in the mixing step, when the mixture is prepared, the sodium silicate is mixed and dissolved with water to form a sodium monosilicate solution, and then the water-soluble resin is added to the sodium silicate solution. , and stir until the water-soluble resin is completely dissolved and mixed.

As a further improvement of the present invention, the inorganic sludge is dried and ground into powder to pass through a #100 sieve.

Compared with the prior art, the beneficial effects of the present invention are:

The present invention uses the inorganic sludge and other main wastes to make the humidity-controlling paint, which can solve the problem of the inorganic sludge being buried, effectively convert the waste into high-value materials, and achieve the effect of resource recycling and reuse. At the same time, the humidity control coating also achieves the effects of high moisture absorption and desorption efficiency, high antibacterial rate and the like.

Description of drawings

1 is a manufacturing flow chart of a preferred embodiment of the present invention;

Fig. 2 is the pore size analysis diagram of A group humidity control coating of the present invention;

Fig. 3 is the humidity control performance analysis diagram of A group humidity control coating of the present invention;

4 is an analysis diagram of the adsorption and desorption capacity of Group A of the present invention;

Fig. 5 is the pore size analysis diagram of the B group humidity control coating of the present invention;

Fig. 6 is the humidity control performance analysis diagram of the B group humidity control coating of the present invention;

7 is an analysis diagram of the adsorption and desorption capacity of Group B of the present invention;

Fig. 8 is the pore size analysis diagram of C group humidity control coating of the present invention;

Fig. 9 is the humidity control performance analysis diagram of the C group humidity control coating of the present invention;

Figure 10 is an analysis diagram of the C group adsorption and desorption capacity of the present invention;

Figure 11 is an analysis diagram of the humidity control performance of the water-soluble paint and water-soluble resin of the present invention in the same mixing ratio.

Detailed ways

The above and other technical contents, features and effects of the present invention will be clearly understood in the following detailed description of the preferred embodiments with reference to the drawings.

The first preferred embodiment of the present invention, the humidity-conditioning coating of this embodiment, comprises a functional material of 30% by weight, a mixture containing 62.5% to 70% by weight, and a mixture of 2.5% to 7.5% by weight Sodium silicate; wherein, the functional material includes a 20-60% by weight inorganic sludge, a 35-65% hemihydrate gypsum, and an inorganic mineral at least 5% by weight, and the above-mentioned inorganic sludge Contains at least 90% by weight of amorphous silica; in addition, the mixture contains a water-soluble resin and water, and the mixing ratio of the water-soluble resin and the water is 1: (2-3), and the above-mentioned Water-soluble resin (such as acrylic resin), or the water-soluble adhesive can also be replaced by water-soluble paint, and below this embodiment, the mixture is mainly described by taking water-soluble resin as an example, and the water-soluble resin is acrylic resin. As an example, the functional materials are linked to each other for painting by virtue of their viscosity; as for the humidity-conditioning coating, the humidity-conditioning coating further contains a sodium silicate of 2.5% to 7.5%; in addition, the humidity-conditioning coating can also be added in a timely manner. A silicon Sodium, and the sodium silicate accounts for 2.5% to 5% by weight of the humidity control coating.

Continuing the above, the inorganic sludge ESF (Enhancement Silica Fume) is an inorganic sludge from traditional industries, which is a manufacturer of precipitated silica in Taiwan. After drying, the inorganic sludge is ground into powder to pass 0.149mm sieve (that is, the thing obtained from the #100 sieve), and in the present invention, the inorganic sludge is dried in an air circulation oven at 105 ° C for 48 hours, cooled to room temperature, and then ground is obtained, and The chemical composition of the inorganic sludge can be selected to be mainly amorphous silica, and the content of the amorphous silica is at least 90% by weight; Shaped silica, which can be completely suspended in water, dissolution of _SiO2 (0.01 to 0.012 weight percent in water at 25°C) yields a monomeric form (i.e. Si(OH) ₄ and solid-phase inorganic sludge dispersed in a solvent, It can be adhered with resin and consolidated between the cross-linked structure of gypsum rod-like particles, and the mesoporous and microporous structure is formed by inorganic sludge and gypsum, and the addition of this inorganic sludge can provide moisture-conditioning coating structure. More mesopores, however, excessive inorganic sludge will crack the surface of the humidity-conditioning coating, so the addition amount of the inorganic sludge must be controlled.

Continuing the above, the inorganic mineral can be one of barite, kaolin, talc and limestone or a mixture thereof, and the inorganic mineral acts as an extender to improve the mechanical properties of the coating and the gloss of the coating film, Permeability and leveling, the extender is insoluble in binders and admixtures, so the proportion of inorganic minerals is usually not more than 25%; in addition, 10-30% by weight can be added to the functional material. Petroleum refining cracking waste catalyst (sFCCC).

Referring to FIG. 1, the manufacturing method of the humidity-controlling coating includes a material preparation step and a mixing step in sequence; wherein, the material preparation step includes a functional material of 30% by weight and a mixture of 62.5 to 70% by weight; wherein, The functional material includes 20-60% by weight of inorganic sludge, 35-65% by weight of hemihydrate gypsum, and at least 5% by weight of inorganic minerals, and the inorganic sludge contains at least 90% by weight of In addition, the mixture contains a water-soluble resin and water, and the mixing ratio of the water-soluble resin and the water is 1:(2～3), and the mixture is changed from the water-soluble resin. When used as a water-soluble paint, the same manufacturing method can still be adopted, and the water-soluble resin is used as an example for illustration in this embodiment, and the water-soluble resin is an experimental illustration by using an acrylic resin; The inorganic sludge, hemihydrate gypsum and inorganic minerals in the functional material belonging to the solid mixture are evenly mixed, and the acrylic resin and water in the liquid mixture are evenly mixed, and then the functional material is mixed with the mixture. Mix and stir to complete the humidity control coating; in addition, if 2.5% to 7.5% by weight of sodium silicate is added, and the sodium silicate is first stirred and mixed with water to form a sodium silicate solution, then the acrylic resin is added to the Sodium silicate solution.

Table 1. In this example, several experimental examples will be listed below, and the water-soluble resin in the mixture in this example: the ratio of deionized water is 1:2.5 as an example to illustrate, and respectively make more The composition ratio is to prove that the humidity-controlling paint of the present invention has a certain effect:

Table 1, the ratio of the experimental example exemplified in the present invention:

For the above prepared proportions, the moisture-adjusting paint prepared above was tested with a sample size of 100mm*100mm and a thickness of 2mm, following the specifications of JIS-A 1470, and the moisture adsorption-desorption test. After curing at 25°C under 75%RH (Relativehumidity, relative humidity) for 24 hours, it was then placed in an indoor environment for 2 days for testing. The following is for group A to adjust the addition ratio of inorganic sludge, and group B to adjust the sodium silicate The addition ratio, group C is to adjust the addition ratio of the waste catalyst to form a humidity-conditioning coating as the follow-up experimental object, and the addition of the inorganic sludge, sodium silicate and waste catalyst affects the properties of the humidity-conditioning coating. illustrate.

First of all, the following tests are carried out on the amount of inorganic sludge added to Group A, and the changes in the porous properties of the humidity-conditioning coating produced by different inorganic sludge ratios are shown in the following table:

Table 2, the porous properties of the humidity-conditioning coating produced by adding different ratios of inorganic sludge:

A-0/0.05/0 A-0.4/0.05/0 A-0.5/0.05/0 A-0.6/0.05/0 BET surface area (m²/g) 3.9 10 13.1 13.5 t-Plot micropore area (m²/g) 7.3 6.9 4.9 6.3 Total pore volume (cm³/g) 0.049 0.147 0.193 0.206 t-Plot micropore volume (cm³/g) 0.0039 0.0038 0.0028 0.0036 Average pore size (nm) 49 58.8 58.8 61

As described in the above table, for the humidity-conditioning coatings formed with different amounts of inorganic sludge added, as the ratio of inorganic sludge increases, the BET surface area (Brunauer-Emmet-Teller) and total pore volume of the humidity-conditioning coating increase, measured as The BET surface areas of the humidity-conditioning coatings with different inorganic sludge ratios (A-0.4/0.05/0, A-0.5/0.05/0 and A-0.6/0.05/0) were 10.01 m ² /g, 13.1 m ² , respectively /g, 13.5m ² /g, both increased compared with 3.9m ² /g obtained in the original test group A-0/0.05/0 without inorganic sludge added; with the increase of inorganic sludge, the total pore volume also increased, from The original 0.049cm ³ /g was increased to 0.206cm ³ /g. Therefore, it can be proved that the addition of inorganic sludge can enhance the pore volume and BET surface area. Furthermore, the mesopores (2nm-50nm) in the inorganic sludge are the most Effective moisture adsorption pores, therefore, when the inorganic sludge is added, the volume of mesopores can be effectively increased, as evidenced by the pore size distribution of the humidity-conditioning coating in Figure 2.

Continuing above, see Table 3, Moisture Adsorption Value and Moisture Content

A-0/0.05/0 A-0.4/0.05/0 A-0.5/0.05/0 A-0.6/0.05/0 Moisture absorption value (g/m²) 216.9 270.3 303.7 316.1 Water absorption (%) 16.3 23.6 25.6 26.7

As shown in Table 3, according to the method of JIS-A 6909 (from 50% RH to 90% RH), the moisture adsorption capacity of the humidity-conditioning coatings with different inorganic sludge ratios is shown in the table, the moisture adsorption value and the moisture content A-0/0.05/0 are 216.9 g/m ² and 16.3%, respectively, so it can be seen that with the increase in the amount of inorganic sludge, the moisture adsorption capacity of the humidity-conditioning coating gradually increases, that is, the sample with inorganic sludge increases. The performance is better than the sample without inorganic sludge A-0/0.05/0; the results show that the capacity of A-0.4/0.05/0, A-0.5/0.05/0 and A-0.6/0.05/0) can reach 270.3g/ m ² , 303.7 g/m ² and 316.1 g/m ² , respectively; in addition, the moisture contents of A-0.4/0.05/0, A-0.5/0.05/0 and A-0.6/0.05/0 were 23.6%, respectively, 25.6% and 26.7%, which can demonstrate that the hygroscopic capacity is positively correlated with BET surface area and total pore volume.

Furthermore, the humidity control performance of the humidity-conditioning coating with different proportions of inorganic sludge was measured by the moisture adsorption-desorption test (JIS-A 1470-1) under the medium humidity range (50%RH-75%RH), and the corresponding results As shown in Figure 3, except for the A-0/0.05/0 sample, A-0.4/0.05/0, A-0.5/0.05/0 and A-0.6/0.05/0 had higher moisture in the medium humidity range Adsorption capacity, indicating that the inorganic sludge has a positive effect on moisture adsorption; in addition, the standard adsorption capacity of the humidity control material (grade 1 and grade 2) is 29g/m ² , and the adsorption time is 12h, which is 50g/m ² ; A- The moisture adsorption capacities of the 0.4/0.05/0, A-0.5/0.05/0 and A-0.6/0.05/0 samples were 48.6 g/m ² , 88.4 g/m ² and 46.1 g/m ² , respectively, and the adsorption time was 12 h , reaching the level 1 benchmark, which is close to level 2; the adsorption-desorption gradient of various samples is A-0.5/0.05/0 sample has the highest adsorption rate (20.1g/m ² /h); in addition, for A-0.4/0.05/ 0 (-17.3g/m ² /h), the best desorption rate can be observed; the results show that the adsorption and desorption rate of the humidity-conditioning coating containing inorganic sludge is faster than that of the humidity-conditioning coating without inorganic sludge, so The experiment of the present invention proves that certain humidity control effect can indeed be obtained by adding the inorganic sludge.

In addition, the following will describe the experimental group for the effect of sodium silicate in the humidity control coating of group B, that is, for B-0.5/0/0, B-0.5/0.025/0, B-0.5/0.5/0 , B-0.5/0.075/0 and other experimental examples are described, that is, the porous properties of the humidity-conditioning coatings with different ratios of sodium silicate are shown in Table 4 below:

Table 4. Porous properties of humidity-conditioning coatings with different ratios of sodium silicate added:

The BET surface areas of the humidity-conditioning coatings with different ratios of sodium silicate (B-0.5/0/0, B-0.5/0.025/0, B-0.5/0.05/0 and B-0.5/0.075/0) were measured, respectively. At 16.18 m ² /g, 13.28 m ² /g, 13.1 m ² /g and 11.52 m ² /g, the total pore volume of the humidity-conditioning coating B samples also increased (B-0.5/0/0=0.190 cm ³ / g, B-0.5/0.025/0=0.167 cm ^{3 /g, B-0.5/0.05/0=0.193 cm 3 /} g and B-0.5/0.075/0=0.126 cm ³ /g); therefore, with silicon With the increase of sodium silicate, a decreasing trend of BET surface area and pore volume was observed; however, as the amount of sodium silicate increased, the micropore area and micropore volume increased due to the filling of small dioxide from silicic acid in the pores The volume of mesopores is almost unchanged due to the polymerization of silicon particles (monomers) and silicates, which can be seen in the pore size distribution in Fig. 4, while the larger pores of B-0.5/0.075/0 are hardly observed; In addition, after experiments, the water droplet adsorption time of B-0.5/0/0 was 34 seconds, the water droplet adsorption time of B-0.5/0.025/0 was 69 seconds, and the water droplet adsorption time of B-0.5/0.05/0 was 67 seconds. The water droplet adsorption time of B-0.5/0.075/0 was 79 seconds, which showed that the humidity-conditioning coatings containing different amounts of sodium silicate needed longer time for adsorption. These results indicated that the humidity-conditioning coatings containing sodium silicate could Absorbs liquid water more slowly than pristine humidity-conditioning coatings, possibly due to silicic acid forming small silica particles and polymerization of silicates.

Furthermore, referring to Table 5, the moisture absorption capacity of the moisture-conditioning coatings containing different weight ratios of sodium silicate:

B-0.5/0/0 B-0.5/0.025/0 B-0.5/0.05/0 B-0.5/0.075/0 Moisture absorption value (g/m²) 72.7 225.6 303.7 410.2 Water absorption (%) 5.4 18.8 25.6 28.8

As the proportion of sodium silicate increases, the moisture adsorption value and moisture content increase. As shown in Table 5, the moisture adsorption value of the humidity-adjusting coating and sodium silicate is B-0.5/0.025/0=225.6g/ ^m2 , B-0.5/0.05/0=303.7g/m ² , B-0.5/0.075/0=410.2g/m ² , which are respectively greater than B-0.5/0/0 (moisture absorption value=72.7g/m ² ). In addition, the water contents of B-0.5/0/0, B-0.5/0.025/0, B-0.5/0.05/0 and B-0.5/0.075/0 were 5.4%, 18.8%, 25.6% and 28.8%, respectively; In addition, the humidity control performance of the humidity-conditioning coating B is shown in Fig. 5 (performed in the medium humidity range (50%RH to 75%RH)); the moisture storage capacity in the low humidity range with different ratios of sodium silicate There are significant differences, indicating that sodium silicate has a positive effect on moisture adsorption. The B-0.5/0.075/0 sample had 68.1 g/m ² at 12 hours, reaching the Grade 2 benchmark and approaching Grade 3, with all humidity conditioning coatings meeting the minimum standard of Grade 1; in addition, B-0.5/0.075/ The 0 sample showed the best adsorption rate (20.8 g/m ² /h) and, according to the adsorption-desorption gradient in Fig. 6, had the best desorption rate (-17.6 g/m ² /h), and with With the increase of the sodium ratio, the response rate of the moisture adsorption in the humidity-conditioning coating is faster; in addition, the persistence of the moisture adsorption capacity during the desorption process remains stable, in addition, the accumulation of moisture content does not occur after four cycle tests, which pass In the presence of sodium silicate (due to chemical adsorption), the moisture adsorption capacity is significantly improved, and the stability of the ceramic coating is better.

Finally, the experimental group _on the role of spent catalysts ( _sFCCCs ) in humidity control coatings in group C will be explained. Sodium silicate is an additive for humidity control coatings. The optimum ratio of inorganic sludge and sodium silicate was determined in the study of , for humidity-conditioning coatings with different ratios of inorganic sludge, the moisture adsorption value was not significantly affected in the medium humidity range; To replace part of the inorganic sludge, due to the existence of the zeolite structure, it improves the pore size distribution; however, due to the larger waste catalyst particles and the addition of excess waste catalyst will reduce the viscosity of the coating, and the addition of the waste catalyst will reduce the viscosity of the coating first. The pore size distribution caused by the catalyst is shown in Table 6 below:

Table 6 shows the porous properties of humidity-conditioning coatings with different ratios of spent catalyst substitutes:

C-0.5/0.05/0 C-0.4/0.05/0.1 C-0.3/0.05/0.2 C-0.2/0.05/0.3 BET surface area (m²/g) 13.1 16.8 14.7 13.3 t-Plot micropore area (m²/g) 5.0 5.3 9.3 13.2 Total pore volume (cm³/g) 0.193 0.126 0.117 0.103 t-Plot micropore volume (cm³/g) 0.0028 0.0029 0.0051 0.0074 Average pore size (nm) 58.8 30.1 31.8 30.7

Due to the zeolite structure, the waste catalyst has a high BET surface area (129m ² /g) and abundant microporous properties, which can enhance the ability of moisture adsorption in the presence of micropores. When the humidity-conditioning coating is replaced with different proportions of waste catalyst, its BET The surface areas (C-0.4/0.05/0.1, C-0.3/0.05/0.2 and C-0.2/0.05/0.3) were 16.8 m ² /g, 14.7 m ² /g and 13.3 m ² /g, respectively, larger than the original C- 0.5/0.05/0 (13.1 m ² /g), as shown in Table 6, in addition, the average pore size of the humidity-conditioning coating that replaced the spent catalyst was smaller (about 30 nm), and in addition, it was found that the area and volume of t-type micropores increase; see Figure 7, its pore size shows a smaller size distribution (less than 25 nm), is more efficient at lower relative humidity, with the best C-0.4/0.05/0.1 sample in mesopores (2 to 50 nm) distribution, the pore volume gradually decreases in the range of 25 to 50 nm due to the content of inorganic sludge reduced by replacing the spent catalyst; in addition, after testing, with the increase of the replacement rate of the spent catalyst, the adsorption time of the humidity-conditioning coating will be reduced. increase, it was found that C-0.3/0.05/0.2 and C-0.2/0.05/0.3 hardly adsorbed water droplets within 130 seconds, and the surface contact angles of C-0.3/0.05/0.2 and C-0.2/0.05/0.3 were in 35.58° and 45.8° at 35 seconds, which is due to the reduction of larger pores, and the waste catalyst has a strong ability to adsorb water vapor and a weak liquid water adsorption capacity; therefore, the above results show that the waste catalyst has a strong ability to adsorb micropores. A positive effect, but a negative effect on the larger pores of the humidity-conditioning coating.

Furthermore, referring to Table 7, the moisture absorption capacity of the humidity-conditioning coatings containing different weight ratios of sodium silicate; in addition, the results of the moisture absorption values and gradients of the humidity-conditioning coatings with waste catalysts, see Fig. 8, Fig. 9, C- The 0.2/0.05/0.3 sample has the highest moisture adsorption value of 71.6g/m ² , reaching the level 3 benchmark; for the C-0.4/0.05/0.1 and C-0.3/0.05/0.2 samples, the moisture adsorption value is 56.9g/ m ² and 59.5 g/m ² , reaching the 2-level benchmark. In addition, the moisture adsorption-desorption gradients have similar trends; the C-0.5/0.05/0 moisture absorption value is 48.4 g/m ² , and the adsorption and desorption gradients are 20.1 respectively. g/m ² /h and -16g/m ² /h, wherein C-0.2/0.05/0.3 has excellent adsorption gradient (20.3g/m ² /h) and desorption gradient (-24.4g/m ² /h) ); according to the results, it can be seen that the adsorption capacity in the medium humidity range is improved with the increase of the replacement rate of the spent catalyst.

Table 7: Moisture absorption capacity of humidity-conditioning coatings with different weight ratios of waste catalysts:

C-0.5/0.05/0 C-0.4/0.05/0.1 C-0.3/0.05/0.2 C-0.2/0.05/0.3 Moisture absorption value (g/m²) 317.4 309.2 308.4 298.1 Water absorption (%) 25.1 27.0 25.8 25.6

In addition, in this experimental example, in this example, the best ratio is carried out by the method of JIS-A-1470-1 as the following table 8. Under the above ratio, the water-soluble resin (acrylic resin) and the water-soluble paint are mixed with Compare:

Table 8: The ratio of water-soluble resin and water-soluble paint used in this experimental example at the same time:

The results are shown in Figure 11. It is found that the adsorption effect is also very good. The water adsorption value of the water-soluble paint is 52.57g/m ² and the water-soluble resin is 57.25g/m ² , both of which reach the second-level effect. Therefore, , when the water-soluble resin (acrylic resin) in the mixture is changed to water-soluble paint, it can still achieve a good effect.

Furthermore, according to the method of JIS-A 6909 (from 50% RH to 90% RH), the ratio of the above test is used as a test, and the moisture adsorption capacity of the humidity-conditioning coating is shown in Table 9. The water-soluble paint moisture adsorption capacity Value and moisture content are 316.8g/m ² and 25.1% respectively, while the water adsorption value and moisture content of water-soluble resin are 309.2g/m ² and 27.6% respectively, so it can be seen that the formula of the mixture is adjusted to make the water-soluble resin more suitable The paint replaces the water-soluble resin, and the effect is still excellent.

Table 9: Moisture absorption capacity of water-soluble paint and water-soluble resin at high humidity

water soluble paint water soluble resin Moisture absorption value (g/m²) 316.8 309.2 Water absorption (%) 25.1 27.0

In addition, in terms of testing the antibacterial function, it is determined by the standard method of JIS Z 2801:2010, as shown in Table 10:

Table 10: Antibacterial activity test

E,coil Blank(0h) Blank(24h) C-0.4/0.05/0.1(24h) Bacterial concentration (CFU/ml) 9.86*10⁴ 6.03*10⁶ 1.00*10⁶ R factor (antibacterial activity) - - 4.78 Antibacterial efficacy - - >99.99%

Continuing the above, from Table 10, after the antibacterial function test, the value of antibacterial activity (R factor) is 4.78 higher than 2.87, which is the threshold value in the standard method of JIS Z 2801:2010, and the result shows that the humidity-conditioning coating of the present invention is indeed Has antimicrobial efficacy higher than 99.99%.

To sum up the above, the humidity-conditioning coating and the manufacturing method thereof of the present invention, the humidity-conditioning coating comprises a functional material of 30% by weight, a mixture containing 62.5-70% by weight, and a compound containing 2.5%-7.5% by weight Sodium silicate; that is, the humidity-conditioning coating is prepared by mixing a certain proportion of inorganic sludge, hemihydrate gypsum and inorganic minerals, sodium silicate, water, and water-soluble resin, and the prepared humidity-conditioning coating has high absorption In addition to the effect of dehumidification and high antibacterial rate, it also solves the problem of inorganic sludge burial, effectively converts waste into high-value materials, and effectively achieves the effect of resource recycling, so it can indeed achieve the purpose of the present invention.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. A humidity-controlling coating is characterized by comprising 30 weight percent of functional material, 62.5 to 70 weight percent of mixing agent and 2.5 to 7.5 weight percent of sodium silicate; wherein the functional material comprises 20-60% by weight of inorganic sludge, 35-65% by weight of semi-hydrated gypsum and at least 5% by weight of inorganic mineral, and the inorganic sludge contains at least 90% by weight of amorphous silicon dioxide; in addition, the mixture contains water-soluble resin and water, and the mixing ratio of the water-soluble resin and the water is 1 (2-3).

2. The humidity control coating according to claim 1, wherein the water-soluble resin is an acrylic resin.

3. The humidity control coating as claimed in claim 1, wherein the functional material further comprises 10-30 wt% of a waste catalyst for petroleum refining and cracking.

4. The humidity control coating according to claim 1, wherein the inorganic sludge is dried and ground into powder, and then passed through a #100 mesh screen.

5. A humidity-controlling coating is characterized by comprising 30 weight percent of functional material, 62.5 to 70 weight percent of mixing agent and 2.5 to 7.5 weight percent of sodium silicate; wherein the functional material comprises 20-60% by weight of inorganic sludge, 35-65% by weight of semi-hydrated gypsum and at least 5% by weight of inorganic mineral, and the inorganic sludge contains at least 90% by weight of amorphous silicon dioxide; in addition, the mixture comprises water-soluble paint and water, and the mixing ratio of the water-soluble paint to the water is 1 (2-3).

6. A method for producing the humidity control paint according to claim 1, comprising:

a material preparation step: it comprises a functional material with a weight percentage of 30 percent, a mixing agent with a weight percentage of 62.5 to 70 percent and sodium silicate with a weight percentage of 2.5 to 7.5 percent; wherein the functional material comprises 20-60% of inorganic sludge, 35-65% of semi-hydrated gypsum and at least 5% of inorganic mineral substances, and the inorganic sludge contains at least 90% of amorphous silicon dioxide; in addition, the mixture comprises a water-soluble resin and water, and the mixing ratio of the water-soluble resin to the water is 1 (2-3); and

a mixing step: the functional material belonging to the solid mixture is uniformly mixed, the sodium silicate and water are firstly stirred and mixed into a sodium silicate solution by the mixing agent, then the water-soluble resin is added into the sodium silicate solution and stirred and dissolved uniformly, and then the functional material and the mixing agent are mixed and stirred, so that the humidity-regulating coating is finished.

7. The method for producing a humidity control coating according to claim 6, wherein the water-soluble resin is an acrylic resin.

8. The method for preparing a humidity-controlling coating as claimed in claim 6, wherein the preparing step further comprises mixing 2.5-7.5 wt% of sodium silicate with water under stirring to form a sodium silicate solution, and adding the water-soluble resin to the sodium silicate solution.

9. The method for producing a humidity controlling paint according to claim 7, wherein in the mixing step, the sodium silicate is mixed with water to dissolve the sodium silicate to form a sodium silicate solution, and then the sodium silicate solution is mixed with the water soluble resin and stirred until the water soluble resin is completely dissolved and mixed.

10. The method for producing a humidity control coating according to claim 6, wherein the inorganic sludge is dried, ground into powder, and passed through a #100 mesh screen.

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