CN111826034B - Humidity control coating and method for producing same - Google Patents
Humidity control coating and method for producing same Download PDFInfo
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- CN111826034B CN111826034B CN201910310857.6A CN201910310857A CN111826034B CN 111826034 B CN111826034 B CN 111826034B CN 201910310857 A CN201910310857 A CN 201910310857A CN 111826034 B CN111826034 B CN 111826034B
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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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 percent, a mixing agent with the weight percentage of 62.5-67.5 percent and sodium silicate with the weight percentage of 2.5-7.5 percent; wherein, the functional material comprises 20 to 60 weight percent of inorganic sludge, 35 to 65 weight percent of semi-hydrated gypsum and 5 to 25 weight percent of inorganic mineral substance, and the inorganic sludge contains at least 90 weight percent 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
Technical Field
The invention relates to a paint proportion and a manufacturing method thereof, in particular to a humidity-adjusting paint and a manufacturing method thereof.
Background
In recent years, the influence of humidity on the indoor environment is gradually paid attention, and relative humidity has direct influence on environment residents, for example, too low humidity not only causes the respiratory system of the residents to feel dry and uncomfortable, but also is a humidity range with high influenza virus activity, is easy to cause diseases, and is easy to cause static phenomenon at low humidity; on the contrary, when the humidity is too high, the growth of microorganisms and dust mites and other biological pollutants is easy to promote in the indoor environment, for example, the dust mites easily survive between 50-80% of the relative humidity, and when the humidity exceeds 80%, the growth probability of the polluting microorganisms is increased, and the biological pollutants indirectly cause discomfort of residents and even cause respiratory diseases, asthma, allergy, fatigue, headache and other health problems.
Therefore, the humidity inside the house is very important, and in order to solve the humidity problem, the active mode mainly uses a dehumidifying agent, a desiccant, a dehumidifier, or an air conditioner, and the passive mode is mainly used for a humidity conditioning material on a building material, and a humidity conditioning coating is researched, and the humidity conditioning coating mainly uses zeolite, sepiolite, diatomite, or the like, and the humidity conditioning coating mainly uses a high molecular water absorbing material, a mineral material, such as kaolin, silica, lime, bauxite, sandstone, cement, and the like, plant fiber, crop waste, activated carbon, and the like are added, and the humidity conditioning material has a high requirement on the humidity absorbing and releasing performance, and the research result cannot be converted into a product flow to the market, so that the preferable benefit can be achieved only by selecting the material.
In addition, inorganic wastes (such as incineration ash, purified water sludge, waste diatomite and coal ash) are generated in the taiwan area every year, the recycling rate is low, the components are mainly inorganic and cannot be incinerated, so most of the inorganic wastes are treated in a burying mode, the saturation speed of a landfill site is increased when a large amount of wastes enter the landfill site, and if the wastes are not buried properly, the ecological environment is seriously influenced, so that the aim of a resource recycling type society can be fulfilled if the inorganic wastes can be recycled as materials.
Disclosure of Invention
Accordingly, an object of the present invention is to provide a humidity control paint which can convert waste into a humidity control paint, effectively reduce the influence of the waste on the environment, and produce a humidity control paint having a better humidity control effect, and a method for producing the same.
The first objective of the present invention is to provide a humidity-controlling coating, which comprises 30 wt% of functional material, 62.5-70 wt% of mixing agent, and 2.5-7.5 wt% 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).
As a further improvement of the present invention, the water-soluble resin is an acrylic resin.
As a further improvement of the invention, the functional material further comprises 10-30 wt% of waste petroleum refining cracking catalyst.
As a further improvement of the invention, the inorganic sludge is dried and ground into powder, and then the powder passes through a No. 100 screen.
The second objective of the present invention is to provide a humidity-controlling coating, which comprises 30 wt% of functional material, 62.5-70 wt% of mixing agent, and 2.5-7.5 wt% 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).
A third object of the present invention is to provide a method for producing a humidity control paint, 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 inorganic sludge, the semi-hydrated gypsum and the inorganic mineral are uniformly mixed according to the proportion to obtain the functional material belonging to a solid mixture, the mixing agent is prepared by firstly stirring and mixing the sodium silicate and water to obtain a sodium silicate solution, then adding the water-soluble resin into the sodium silicate solution, uniformly stirring and dissolving, and then mixing and stirring the functional material and the mixing agent to obtain the humidity-regulating coating.
As a further improvement of the present invention, the water-soluble resin is an acrylic resin.
As a further improvement of the invention, in the preparation step, sodium silicate with the weight percentage of 2.5-7.5% is prepared, and the water-soluble resin is added into the sodium silicate solution after the sodium silicate is stirred and mixed with water to form the sodium silicate solution.
As a further improvement of the present invention, in the mixing step, when the mixture is prepared, the sodium silicate is first mixed and dissolved with water to form a sodium silicate solution, and then the water-soluble resin is added to the sodium silicate solution and stirred until the water-soluble resin is completely dissolved and mixed.
As a further improvement of the invention, the inorganic sludge is dried and ground into powder, and then the powder is passed through a #100 screen.
Compared with the prior art, the invention has the beneficial effects that:
the humidity-adjusting coating prepared by using the main wastes such as the inorganic sludge can solve the problem of burying the inorganic sludge, effectively converts the wastes into high-value materials, achieves the effect of recycling resources, and simultaneously achieves the effects of high moisture absorption and desorption, high antibacterial rate and the like.
Drawings
FIG. 1 is a flow chart illustrating the fabrication of a preferred embodiment of the present invention;
FIG. 2 is a graph of pore size analysis of a group A humidity control coating of the present invention;
FIG. 3 is a graph of humidity control performance analysis of a group A humidity control coating of the present invention;
FIG. 4 is a graph showing the analysis of the adsorption and desorption capacities of group A according to the present invention;
FIG. 5 is a graph of pore size analysis of a group B humidity control coating of the present invention;
FIG. 6 is a graph of humidity control performance analysis of a group B humidity control coating of the present invention;
FIG. 7 is a graph showing the analysis of adsorption and desorption capacities of group B according to the present invention;
FIG. 8 is a graph of pore size analysis of a group C humidity control coating of the present invention;
FIG. 9 is a graph of humidity control performance analysis of a humidity control coating of group C of the present invention;
FIG. 10 is a graph showing the analysis of adsorption and desorption capacities of group C according to the present invention;
FIG. 11 is a graph showing the analysis of humidity control performance of the water-soluble paint and the water-soluble resin according to the present invention at the same mixing ratio.
Detailed Description
These and other aspects, features and advantages of the present invention will become apparent from the following detailed description of preferred embodiments, which is to be read in connection with the accompanying drawings.
In a first preferred embodiment of the present invention, the humidity controlling coating of the present embodiment includes 30 wt% of a functional material, 62.5-70 wt% of a mixing agent, and 2.5-7.5 wt% 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 a water-soluble resin and water, the mixing ratio of the water-soluble resin and the water is 1 (2-3), the water-soluble resin (such as acrylic resin) or the water-soluble adhesive can be replaced by water-soluble paint, in the following embodiment, the mixture is mainly illustrated by the water-soluble resin, the water-soluble resin is illustrated by the acrylic resin, and the functional materials are mutually linked by the viscosity of the water-soluble resin for coating; in addition, the humidity control coating further comprises 2.5% to 7.5% of sodium silicate, that is, in the following experimental example ratios exemplified in this embodiment, sodium silicate may be added to the humidity control coating at a proper time, and in most experimental example ratios, the example in which the sodium silicate accounts for 5% by weight of the humidity control coating is taken as an experimental description.
Continuing above, the inorganic sludge esf (enhancement silicon Fume) is an inorganic sludge from traditional industry, and is a producer of precipitated Silica in taiwan area, the inorganic sludge is dried and ground into powder to pass through a 0.149mm sieve (i.e. a #100 sieve), and in the present invention, the inorganic sludge is dried in an air circulation oven at 105 ℃ for 48 hours, cooled to room temperature and ground into a powder, and the inorganic sludge can be selected from a chemical composition mainly comprising amorphous Silica, and the content of the amorphous Silica is at least 90 wt% or more; in addition, the inorganic sludge is an amorphous silica with micro-sized particles, which can be completely suspended in water, SiO2(0.01 to 0.012 percent by weight in water at 25 ℃) results in the monomeric form (i.e., Si (OH)4And a solid phase, while the inorganic sludge is dispersed in the solutionIn the agent, it can be adhered with resin and consolidated between the cross-linked structures of the gypsum rod-like particles, and the mesopore and micropore structures are formed by inorganic sludge and gypsum, and the addition of the inorganic sludge can provide more mesopores for the humidity-controlling coating structure, however, the excessive inorganic sludge can crack the surface of the humidity-controlling coating, so the addition amount of the inorganic sludge must be controlled.
Still further, the inorganic mineral may be one or a mixture of barite, kaolin, talc and limestone, and the inorganic mineral acts as an extender to improve the mechanical properties of the coating and the gloss, penetration and leveling of the coating film, the extender being insoluble in the binder and the mixing agent, so that the inorganic mineral proportion is typically not more than 25%; in addition, 10-30 wt% of petroleum refining cracking waste catalyst (sFCCC) can be added into the functional material at proper time.
Referring to fig. 1, the manufacturing method of the humidity-controlling coating sequentially includes a material preparation step and a mixing step; wherein, the preparation step comprises preparing a functional material with a weight percentage of 30 percent and a mixing agent with a weight percentage of 62.5-70 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, the mixing ratio of the water-soluble resin to the water is 1 (2-3), the same manufacturing method can be adopted when the mixture is changed from the water-soluble resin to the water-soluble paint, the water-soluble resin is taken as an example in the embodiment, and the acrylic resin is taken as an experimental instruction; in addition, in the mixing step, the inorganic sludge, the semi-hydrated gypsum and the inorganic mineral are uniformly mixed to obtain a functional material belonging to a solid mixture, and the acrylic resin and the water in the liquid mixture are uniformly mixed, and then the functional material and the mixture are mixed and stirred to complete the humidity-regulating coating; in addition, if sodium silicate with the weight percentage of 2.5-7.5 percent is added, the sodium silicate is stirred and mixed with water to form a sodium silicate solution, and then the acrylic resin is added into the sodium silicate solution.
Table one, in this example, the following examples are listed, and the water-soluble resin in the mixture in this example: the deionized water ratio is 1:2.5 as an example, and a plurality of groups of ratios are respectively prepared to prove that the humidity-regulating coating has certain effects:
table one, the ratio of the experimental examples of the present invention:
in the above-described prepared formulation, the humidity control coating material prepared as described above was subjected to a moisture adsorption-desorption test in a sample size of 100mm x 100mm and a thickness of 2mm in accordance with JIS-a 1470. After curing at 25 ℃ for 24 hours at 75% RH (Relative humidity), the coating was placed in an indoor environment for 2 days for testing, and a humidity-controlling coating was formed as a subsequent experimental object by adjusting the inorganic sludge addition ratio in group a, the sodium silicate addition ratio in group B, and the waste catalyst addition ratio in group C, and the characteristics of the humidity-controlling coating were explained.
The following tests were first carried out on how much inorganic sludge was added in relation to group a, the change in the porous properties of the humidity-conditioning coating produced with different inorganic sludge ratios, as shown in the following table:
secondly, the porous properties of the humidity-adjusting coating generated by adding different inorganic sludge proportions are as follows:
| 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 (m)2/g) | 3.9 | 10 | 13.1 | 13.5 |
| t-Plot pore area (m)2/g) | 7.3 | 6.9 | 4.9 | 6.3 |
| Total pore volume (cm)3/g) | 0.049 | 0.147 | 0.193 | 0.206 |
| t-Plot micropore volume (cm)3/g) | 0.0039 | 0.0038 | 0.0028 | 0.0036 |
| Average pore diameter (nm) | 49 | 58.8 | 58.8 | 61 |
As described above, for the humidity control coatings formed with different inorganic sludge addition amounts, as the inorganic sludge ratio increases, the BET surface area (Brunauer-Emmet-Teller) and the total pore volume of the humidity control coating increase, and the BET surface areas of the humidity control 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 measured to be 10.01m2/g、13.1m2/g、13.5m2(g), 3.9m each of which was obtained from the test group A-0/0.05/0 to which inorganic sludge had not been added2(ii) an increase in/g; as the inorganic sludge increases, the total pore volume also increases, from the original 0.049cm3Increase to 0.206 cm/g3Therefore, it can be demonstrated that the addition of inorganic sludge enhances pore volume and BET surface area; furthermore, mesopores (2nm to 50nm) in the inorganic sludge are the most effective moisture adsorption pores, and therefore, when the inorganic sludge is added, the mesopore volume can be effectively increased, as evidenced by the pore size distribution of the humidity control coating layer in fig. 2.
Continuing above, see Table III, moisture adsorption number 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/m)2) | 216.9 | 270.3 | 303.7 | 316.1 |
| Water absorption (%) | 16.3 | 23.6 | 25.6 | 26.7 |
As shown in Table III, the moisture adsorption capacities of the humidity control coatings having different inorganic sludge ratios according to the method of JIS-A6909 (from 50% RH to 90% RH) are shown in the table, and the moisture adsorption values and the moisture contents A-0/0.05/0 are 216.9g/m, respectively2And 16.3 percent, so that the moisture adsorption capacity of the humidity-adjusting coating is gradually increased along with the increase of the amount of the inorganic sludge, namely the performance of the sample with the inorganic sludge is superior to that of the sample without the 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/m2,303.7g/m2And 316.1g/m2Respectively; further, 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%, 25.6% and 26.7%, respectively, which could demonstrate a positive correlation between the moisture absorption capacity and the BET surface area and the total pore volume.
Further, the humidity control performance of the humidity control coating layer by various inorganic sludge ratios was measured in a medium humidity range (50% RH-75% RH) by a moisture adsorption-desorption test (JIS-A1470-1), and the corresponding results are shown in FIG. 3, in which A-0.4/0.05/0, A-0.5/0.05/0 and A-0.6/0.05/0 have higher moisture adsorption capacity in the medium humidity range in addition to the A-0/0.05/0 sample, indicating that the inorganic sludge has a positive effect on moisture adsorption; in addition, standard adsorption capacities of the humidity control materials (class 1 and class 2)The amount was 29g/m2The adsorption time is 12h and is 50g/m2(ii) a The water adsorption capacities of the samples A-0.4/0.05/0, A-0.5/0.05/0 and A-0.6/0.05/0 were 48.6g/m2，88.4g/m2And 46.1g/m2The adsorption time is 12h, reaches the level 1 standard and approaches the level 2; the adsorption-desorption gradient of each sample was A-0.5/0.05/0, and the adsorption rate of the sample was the highest (20.1 g/m)2H); furthermore, for A-0.4/0.05/0(-17.3 g/m)2H), an optimal desorption rate can be observed; the results show that the adsorption and desorption rates of the humidity-adjusting coating containing the inorganic sludge are faster than those of the humidity-adjusting coating without the inorganic sludge, so the experiment of the invention proves that a certain humidity-adjusting effect can be really obtained by adding the inorganic sludge.
In addition, the experimental groups for group B regarding the effect of sodium silicate in the humidity control coating are described below, i.e., for the experimental examples B-0.5/0/0, B-0.5/0.025/0, B-0.5/0.05/0, B-0.5/0.075/0, and so on, i.e., for the porous properties of the humidity control coatings at different sodium silicate ratios, as shown in Table four below:
table four, the addition of different sodium silicate ratios produced a porous nature of the humidity-controlling coating:
| B-0.5/0/0 | B-0.5/0.025/0 | B-0.5/0.05/0 | B-0.5/0.075/0 | |
| BET surface area (m)2/g) | 16.2 | 13.3 | 13.1 | 11.5 |
| t-Plot pore area (m)2/g) | 1.9 | 3.8 | 4.9 | 5.1 |
| Total pore volume (cm)3/g) | 0.190 | 0.167 | 0.193 | 0.126 |
| t-Plot micropore volume (cm)3/g) | 0.0019 | 0.0023 | 0.0028 | 0.0029 |
| Average pore diameter (nm) | 47.0 | 50.2 | 58.8 | 44.1 |
The BET surface areas of the humidity-controlling coatings were found to be 16.18m for different proportions 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), respectively2/g，13.28m2/g，13.1m2G and 11.52m2The total pore volume of the conditioning coating B samples also increased (B-0.5/0/0 ═ 0.190 cm/g)3/g，B-0.5/0.025/0＝0.167cm3/g，B-0.5/0.05/0＝0.193cm30.126 cm/g and B-0.5/0.075/03(iv)/g); thus, with increasing sodium silicate, a decreasing trend of BET surface area and pore volume was observed; however, as the amount of sodium silicate increases, the micropore area and micropore volume increase, due to little change in the volume of mesopores resulting from the polymerization of silicate-filled small silica particles (monomers) and silicate in the pores, which can be seen in the pore size distribution of fig. 4, while the larger pores of B-0.5/0.075/0 are hardly observed; in addition, the results of the experiments in which 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, the water droplet adsorption time of B-0.5/0.05/0 was 67 seconds, and the water droplet adsorption time of B-0.5/0.075/0 was 79 seconds show that humidity control coatings containing different amounts of sodium silicate take longer to adsorb, indicating that humidity control coatings containing sodium silicate can adsorb liquid water more slowly than the original humidity control coating, probably due to the formation of small silica particles and the aggregation of silicate by the silicic acid.
Further, referring to table five, the moisture absorption capacity of the humidity 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/m)2) | 72.7 | 225.6 | 303.7 | 410.2 |
| Water absorption (%) | 5.4 | 18.8 | 25.6 | 28.8 |
As the ratio of sodium silicate increased, the moisture adsorption value and moisture content increased, and as shown in Table five, the moisture adsorption value of the humidity control coating to sodium silicate was B-0.5/0.025/0-225.6 g/m2，B-0.5/0.05/0＝303.7g/m2，B-0.5/0.075/0＝410.2g/m2Respectively greater than B-0.5/0/0 (moisture absorption value of 72.7 g/m)2). Further, 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 control coating B is shown in fig. 5 (performed in the medium humidity range (50% RH to 75% RH)); the significant difference in water storage capacity in the low humidity range with different sodium silicate ratios indicates that sodium silicate has a positive effect on water adsorption. The B-0.5/0.075/0 sample had a viscosity of 68.1g/m at 12 hours2All the humidity control coatings can reach the lowest standard of grade 1 when reaching the grade 2 standard and approaching grade 3; furthermore, the B-0.5/0.075/0 sample shows the best adsorption rate (20.8 g/m)2H) and according to the adsorption-desorption gradient in FIG. 6, has an optimum desorption rate (-17.6 g/m)2H), in addition, the response rate of moisture adsorption in the humidity-adjusting coating is faster along with the increase of the proportion of the sodium silicate; furthermore, the durability of the moisture adsorption capacity during desorption remains stable, and furthermore, no accumulation of moisture content occurs after four cycle tests, which significantly improves the moisture adsorption capacity by the presence of sodium silicate (due to chemisorption) and the stability of the ceramic coating is better.
Finally, the relevant spent catalysts (sFCCCs) for group C are usedEffect in humidity control coatings the experimental group illustrates that sodium silicate is an additive to humidity control coatings, the SiO of which2/Na2The O ratio is 2.05-2.25, the optimal proportion of the inorganic sludge and the sodium silicate is determined in the previous research, and for humidity-adjusting coatings with different inorganic sludge ratios, the moisture adsorption value is not significantly influenced in a medium humidity range; when the waste catalyst is used to replace part of the inorganic sludge, the zeolite structure improves the distribution of pore diameter; however, since the larger particles of the waste catalyst and the addition of an excessive amount of the waste catalyst lower the viscosity of the coating layer, the pore size distribution for the added waste catalyst is as follows:
table six is the porous nature of the humidity-conditioning coating of the spent catalyst substitutes in different proportions:
| 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 (m)2/g) | 13.1 | 16.8 | 14.7 | 13.3 |
| t-Plot pore area (m)2/g) | 5.0 | 5.3 | 9.3 | 13.2 |
| Total pore volume (cm)3/g) | 0.193 | 0.126 | 0.117 | 0.103 |
| t-Plot micropore volume (cm)3/g) | 0.0028 | 0.0029 | 0.0051 | 0.0074 |
| Average pore diameter (nm) | 58.8 | 30.1 | 31.8 | 30.7 |
The spent catalyst has a high BET surface area (129 m) due to the zeolite structure2Per g) and rich micropore property, and can enhance the water adsorption capacity in the presence of micropores, and the BET surface area (C-0.4/0.05/0.1, C-0.3/0.05/0.2 and C-0.2/0.05/0.3) of the humidity control coating is 16.8m when the humidity control coating is replaced by the waste catalyst with different proportions2/g，14.7m2G and 13.3m2G, greater than original C-0.5/0.05/0(13.1 m)2As shown in table six), furthermore, the average pore diameter of the humidity control coating replacing the spent catalyst was small (about 30nm), and furthermore, an increase in the t-type micropore area and volume was found; referring to FIG. 7, the pore size shows a smaller size distribution (less than 25nm), more efficient at lower relative humidity, at C-0.4/0.05/0.1 in the mesopores (2 to 0nm) of the sample50nm), the pore volume gradually decreasing in the range of 25 to 50nm due to the content of inorganic sludge reduced by replacing the spent catalyst; in addition, through tests, the adsorption time of the humidity-adjusting coating is increased along with the increase of the replacement rate of the waste catalyst, and the results show that water drops are hardly adsorbed in 130 seconds by C-0.3/0.05/0.2 and C-0.2/0.05/0.3, and the surface contact angles of C-0.3/0.05/0.2 and C-0.2/0.05/0.3 are 35.58 degrees and 45.8 degrees respectively at 35 seconds, which are due to the reduction of larger pores, the waste catalyst has strong water vapor adsorption capacity and weak liquid water adsorption capacity; thus, the above results show that the spent catalyst has a positive effect on the micropores, but a negative effect on the larger pores of the humidity-exchange coating.
Furthermore, referring to table seven, the moisture absorption capacity of the humidity-conditioning coating containing different weight ratios of the spent catalyst; further, the moisture adsorption value and gradient of the humidity control coating material having the spent catalyst are shown in FIGS. 8 and 9, and the sample C-0.2/0.05/0.3 has the highest moisture adsorption value of 71.6g/m2Reaching the level 3 standard; for the C-0.4/0.05/0.1 and C-0.3/0.05/0.2 samples, the water adsorption values were 56.9g/m, respectively2And 59.5g/m2Reaching a level 2 benchmark, and in addition, the moisture adsorption-desorption gradient has a similar trend; wherein the C-0.5/0.05/0 moisture absorption value is 48.4g/m2The adsorption and desorption gradients are respectively 20.1g/m2H and-16 g/m2In which C-0.2/0.05/0.3 has an excellent adsorption gradient (20.3 g/m)2H) and desorption gradient (-24.4 g/m)2H); from the results, it can be seen that the adsorption capacity in the medium humidity range is improved as the substitution rate of the spent catalyst is increased.
TABLE VII: moisture absorption capacity of humidity control coatings containing different weight ratios of spent catalyst:
| 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/m)2) | 317.4 | 309.2 | 308.4 | 298.1 |
| Water absorption (%) | 25.1 | 27.0 | 25.8 | 25.6 |
In addition, in this experimental example, the optimum compounding ratio in this example according to JIS-A-1470-1 is shown in the following Table eight, wherein the water-soluble resin (acrylic resin) is compared with the water-soluble paint at the above ratio:
table eight: the proportion of the water-soluble resin and the water-soluble paint adopted in the experimental example is as follows:
as a result, as shown in FIG. 11, it was found that the adsorption effect was also excellent and the water adsorption value of the water-soluble paint reached 52.57g/m2And the water-soluble resin was 57.25g/m2The second-level effect is achieved, so that the water-soluble resin (acrylic resin) in the mixture can still achieve good effect when being changed into water-soluble paint.
Further, the moisture adsorption capacity of the humidity control coating was shown in Table nine by testing according to the method of JIS-A6909 (from 50% RH to 90% RH) at the above-mentioned test formulation, and the water adsorption value and the water content of the water-soluble paint were 316.8g/m, respectively2And 25.1%, and the water-soluble resin has a water adsorption value and a water content of 309.2g/m, respectively2And 27.6%, it can be seen that the effect is excellent by adjusting the formulation of the blending agent and replacing the water-soluble resin with the water-soluble paint.
Table nine: moisture absorption capacity of water-soluble paint and water-soluble resin at high humidity
| Water-soluble paint | Water-soluble resin | |
| Moisture absorption value (g/m)2) | 316.8 | 309.2 |
| Water absorption (%) | 25.1 | 27.0 |
In addition, for the test of antibacterial function, the following test was performed in accordance with JIS Z2801: 2010 standard method assay, as shown in table ten: TABLE Ten antimicrobial 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*102 |
| R factor (antibacterial activity) | - | - | 4.78 |
| Antibacterial effect | - | - | >99.99％ |
Continuing from the above, by table ten, the antibacterial activity (R factor) value after the antibacterial function test was 4.78, which is in accordance with JIS Z2801: the results of the antibacterial activity tests carried out by the 2010 standard method show that the humidity-controlling coating of the invention indeed has an antimicrobial efficacy higher than 99.99%.
In summary, the humidity control coating and the manufacturing method thereof of the present invention comprise a functional material 30 wt%, a mixing agent 62.5-70 wt%, and a sodium silicate 2.5-7.5 wt%; the humidity-adjusting coating is prepared by mixing inorganic sludge, semi-hydrated gypsum, inorganic mineral substances, sodium silicate, water and water-soluble resin according to a certain proportion, and the prepared humidity-adjusting coating has high moisture absorption and release effects and high antibacterial rate, and simultaneously solves the problem of burying the inorganic sludge, effectively converts waste into high-value materials, and effectively achieves the effect of recycling resources, so the aim of the invention can be achieved.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A humidity-controlling coating is characterized by comprising 30 weight percent of functional material, 62.5 to 67.5 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 5-25% by weight of inorganic mineral, and the inorganic sludge contains at least 90% by weight of amorphous silicon dioxide; the mixture comprises water-soluble resin and water, the sodium silicate is stirred and mixed with the water to form a sodium silicate solution, then the water-soluble resin is added into the sodium silicate solution, the mixing ratio of the water-soluble resin to the water is 1 (2-3), so that the functional material and the liquid sodium silicate-containing mixture are mixed and stirred conveniently, and the functional material is prepared by uniformly mixing inorganic sludge, semi-hydrated gypsum and inorganic mineral substances to obtain the functional material belonging to a solid mixture.
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 method for producing a humidity control coating material, 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 67.5 percent, and a sodium silicate with a weight percentage of 2.5 to 7.5 percent; the functional material comprises 20-60 wt% of inorganic sludge, 35-65 wt% of semi-hydrated gypsum and 5-25 wt% of inorganic mineral substances, wherein the inorganic sludge contains at least 90 wt% 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 inorganic sludge, the semi-hydrated gypsum and the inorganic mineral are uniformly mixed according to the proportion to obtain a functional material belonging to a solid mixture, the sodium silicate is firstly mixed with the water to form a sodium silicate solution, then the water-soluble resin is added into the sodium silicate solution, and then the functional material and the liquid-state sodium silicate-containing mixture are mixed and stirred to complete the humidity-regulating coating.
6. The method for producing a humidity control coating according to claim 5, wherein the water-soluble resin is an acrylic resin.
7. The method for producing a humidity control paint according to claim 6, wherein in the mixing step, the acrylic resin is added to the sodium silicate solution, and the acrylic resin is stirred until the acrylic resin is completely dissolved and mixed in the sodium silicate solution.
8. The method for producing a humidity control coating according to claim 5, wherein the inorganic sludge is dried, ground into powder, and passed through a #100 mesh screen.
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Effective date of registration: 20230807 Address after: Floor 2, No. 128, Fenglin 4th Road, Daliao District, Kaohsiung, Taiwan, China, China Patentee after: Xu Renying Address before: 550 dianyan road 190 lane, Yangmei District, Taoyuan, Taiwan, China Patentee before: Yucheng Technology Co.,Ltd. |