CN110002840B - A kind of method that utilizes calcium chloride to prepare automatic humidity control material - Google Patents
A kind of method that utilizes calcium chloride to prepare automatic humidity control material Download PDFInfo
- Publication number
- CN110002840B CN110002840B CN201910225619.5A CN201910225619A CN110002840B CN 110002840 B CN110002840 B CN 110002840B CN 201910225619 A CN201910225619 A CN 201910225619A CN 110002840 B CN110002840 B CN 110002840B
- Authority
- CN
- China
- Prior art keywords
- calcium chloride
- limestone
- waste glass
- humidity
- humidity control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 title claims abstract description 54
- 239000001110 calcium chloride Substances 0.000 title claims abstract description 53
- 229910001628 calcium chloride Inorganic materials 0.000 title claims abstract description 53
- 239000000463 material Substances 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 13
- 235000019738 Limestone Nutrition 0.000 claims abstract description 29
- 239000011521 glass Substances 0.000 claims abstract description 29
- 239000006028 limestone Substances 0.000 claims abstract description 29
- 239000002699 waste material Substances 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 24
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 239000004566 building material Substances 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 238000000465 moulding Methods 0.000 claims abstract description 5
- 238000010521 absorption reaction Methods 0.000 abstract description 17
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 238000005034 decoration Methods 0.000 abstract description 4
- 238000002360 preparation method Methods 0.000 abstract description 4
- 238000003795 desorption Methods 0.000 abstract description 3
- MKTRXTLKNXLULX-UHFFFAOYSA-P pentacalcium;dioxido(oxo)silane;hydron;tetrahydrate Chemical compound [H+].[H+].O.O.O.O.[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O MKTRXTLKNXLULX-UHFFFAOYSA-P 0.000 description 11
- 239000011148 porous material Substances 0.000 description 11
- 230000008859 change Effects 0.000 description 7
- 230000004044 response Effects 0.000 description 7
- 230000033228 biological regulation Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000001179 sorption measurement Methods 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- 239000004113 Sepiolite Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 238000000748 compression moulding Methods 0.000 description 2
- 239000002274 desiccant Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000012047 saturated solution Substances 0.000 description 2
- 229910052624 sepiolite Inorganic materials 0.000 description 2
- 235000019355 sepiolite Nutrition 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 241000345998 Calamus manan Species 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 235000012950 rattan cane Nutrition 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/20—Silicates
- C01B33/26—Aluminium-containing silicates, i.e. silico-aluminates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B30/00—Compositions for artificial stone, not containing binders
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/03—Particle morphology depicted by an image obtained by SEM
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Drying Of Gases (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
本发明涉及一种利用氯化钙制备自动调湿材料的方法，属于建筑物室内功能性饰面材料制备技术领域。先将废玻璃和石灰石粉碎，过100目筛并烘干；再以质量百分比先量取废玻璃：石灰石＝20％～90％：10％～80％，再量取废玻璃和石灰石：氯化钙＝85％～99％：1％～15％，最后量取废玻璃和石灰石和氯化钙总重量的5％～10％的水或氢氧化钠溶液，氢氧化钠溶液的浓度为2～5mol/L；将各原料混合均匀后，在10～30MPa的成型压力下压制成块状样品并脱模，在140℃～200℃下，进行水热固化1～24h，经过烘干后制得块状固化产品为高强度自动调湿建筑材料。本发明工艺简单、节能环保，得到的产品具有优越的吸放湿性能，远超国标《JC/T 2082‑2011调湿功能室内建筑装饰材料》的要求。
The invention relates to a method for preparing an automatic humidity control material by utilizing calcium chloride, and belongs to the technical field of preparation of indoor functional decorative materials for buildings. First crush the waste glass and limestone, pass through a 100-mesh sieve and dry; then measure the waste glass by mass percentage: limestone = 20%-90%: 10%-80%, then measure the waste glass and limestone: chloride Calcium=85%～99%: 1%～15%, finally measure 5%～10% of the total weight of waste glass, limestone and calcium chloride in water or sodium hydroxide solution, the concentration of sodium hydroxide solution is 2～10% 5mol/L; after mixing the raw materials uniformly, press into a block sample under the molding pressure of 10-30MPa and demould, and perform hydrothermal curing at 140℃～200℃ for 1～24h, and obtain after drying. Block cured products are high-strength self-moisture-conditioning building materials. The invention has simple process, energy saving and environmental protection, and the obtained product has excellent moisture absorption and desorption performance, which far exceeds the requirements of the national standard "JC/T 2082-2011 Humidity Control Functional Indoor Building Decoration Materials".
Description
Technical Field
The invention relates to a method for preparing an automatic humidity adjusting material by using calcium chloride, belonging to the technical field of preparation of indoor functional facing materials of buildings.
Background
With the development of the times and the improvement of living standard, the requirement of people on environmental comfort is higher and higher. In addition, since nearly 90% of the life of a person spends indoors on average, comfort and health of a living environment are increasingly emphasized. In which, besides the temperature, the indoor humidity has an important influence on the health and comfort of people. And the humidity is largely influenced by the relative humidity of the air. When the relative humidity is too high, the body feels stuffy and hot, and the propagation speed of bacteria and viruses in the air is high; when the relative humidity of the air is too low, the human body feels dry and uncomfortable. Studies have shown that room air Relative Humidity (RH) of 40% to 70% is preferred. The automatic humidity control material can automatically maintain the indoor humidity within the range without additional conditions.
The automatic humidity-adjusting material is firstly proposed by Japanese scholars, such as the rattan, the court and the like, can automatically adjust the relative humidity of air by depending on the humidity absorbing and releasing performance of the material, improves the indoor living comfort and can save the energy consumption for adopting the air-conditioning dehumidification. The humidity-regulating properties of the material are mainly determined by the pore (or layered) structure and the diffusion of water vapor molecules in the pores. When the partial pressure of water vapor in the air is higher than the saturated vapor pressure of water on the concave liquid surface in the pore channel, the water vapor is adsorbed; otherwise, it is desorbed. In addition, according to a relation graph of humidity and pore diameter established by scholars of new wells and the like, the following characteristics are obtained: the pore diameter corresponding to 40% of RH is 3.2nm, the pore diameter corresponding to 70% of RH is 7.4nm, if the material is rich in 3.2-7.4 nm mesopores, the material can automatically maintain the indoor humidity within the most comfortable range of human body of 40% -70%, namely, when the indoor humidity is higher than 70%, the material can automatically absorb moisture, so that the indoor humidity is reduced; when the indoor humidity is lower than 40%, the material can automatically release moisture, so that the indoor humidity is increased.
At present, all inorganic minerals are used for preparing humidity control materials, and minerals with a large amount of mesopores, a large specific surface area and strong adsorption capacity, such as sepiolite (see patent No. ZL 201510017134.9) and diatomite (see patent No. CN 108262003A), are directly used as raw materials. The patent No. CN108262003A discloses a method for preparing a humidity control material of diatom-based calcium silicate hydrate powder from diatomaceous earth, but since it has no strength, it cannot be used alone as a material for building walls, and only a part of it is added, which affects the automatic humidity control effect. The humidity controlling material prepared by patent No. ZL201510017134.9 directly adopts sepiolite with excellent mesoporous structure as raw material.
Disclosure of Invention
The invention aims to provide a preparation method of an automatic humidity adjusting material which has simple process and low cost and can be directly used as an indoor functional finishing material of a building.
In order to achieve the above purpose, the present invention finds that calcium chloride is used for producing various drying agents due to its unique deliquescence and water absorption properties, for example, patent No. CN102211016A uses activated carbon particles or activated carbon fibers as a substrate, and a certain amount of calcium chloride is added to make a moisture absorption drying agent. However, it can only adsorb water but cannot release the desorbed water, and therefore, humidity control cannot be performed. Therefore, calcium chloride is not applied to humidity control materials in the building material market at present.
The amount of waste glass in China is large. Limestone is abundant in China, occupies 1/20 of the area of China, occupies more than 60 percent of the whole world, and is a common building material. The waste glass and limestone have no case of being directly used for preparing the humidity-adjusting material at present due to poor mesoporous structures.
The limestone and waste glass with poor pore structures are used as raw materials, calcium chloride is added, and tobermorite is generated in a hydrothermal curing mode, and the moisture-adjusting performance of the tobermorite is improved due to the specific microporous structure of the tobermorite. The method provided by the invention fully utilizes the unique deliquescence and water absorption performance of calcium chloride and the improved mesoporous structure, greatly improves the humidity regulation performance of the product, and can keep the multi-mesoporous structure generated in the product while reducing the production energy consumption due to the lower reaction temperature, thereby further improving the humidity regulation performance of the product. Subsequent tests show that the 24-hour water absorption of the material can reach 312g/m2Far exceeds the national standard requirement and has excellent automatic humidity regulation performance.
The method comprises the following specific steps:
firstly, crushing waste glass and limestone, respectively sieving the crushed waste glass and limestone with a 100-mesh sieve and drying the crushed waste glass and limestone; and then measuring the waste glass by mass percent: 20% -90% of limestone: 10% -80%, measuring waste glass and limestone: 85% -99% of calcium chloride: 1-15 percent of waste glass, limestone and calcium chloride, and finally, measuring water or a sodium hydroxide solution with the concentration of 2-5 mol/L, wherein the water or the sodium hydroxide solution accounts for 5-10 percent of the total weight of the waste glass, the limestone and the calcium chloride, uniformly mixing the measured raw materials, pressing the mixture into a block sample under the molding pressure of 10-30 MPa, demolding, carrying out hydrothermal curing at the temperature of 140-200 ℃ for 1-24 hours, and drying to obtain a block cured product which is a high-strength automatic humidity-regulating building material. Through detection, the product has higher flexural strength, and has the requirements of moisture absorption capacity of 3-24 h levels in the international JC/T2082 plus 2011 humidity control function indoor building decoration material and the corresponding regulations of the moisture release capacity, and can meet the use requirements of indoor building decoration materials.
The invention has the advantages and effects that:
1, due to the addition of the calcium chloride, the unique deliquescence and water absorption performance of the calcium chloride can be fully utilized, the moisture absorption effect is enhanced, and the tobermorite with a certain mesoporous structure is obtained through hydrothermal reaction synthesis, so that the mesoporous structure of the product can be further improved, the mesoporous content of 3.2-7.4 nm in the product is greatly increased, the defect that the calcium chloride can only absorb water but can not release the desorbed water is avoided, and the product has excellent performance of automatically adjusting the humidity.
2, because the reaction temperature of the hydrothermal curing process adopted by the invention is lower than 200 ℃, on one hand, the energy consumption is low, compared with the temperature of the traditional firing process which is higher than 1000 ℃, the production energy consumption is reduced by 5 times, and the preparation cost of the product is low; on the other hand, the lower temperature is beneficial to the retention of the mesoporous structure generated in the product and the improvement of the humidity regulating performance.
3, the invention not only has certain breaking strength (more than or equal to 12MPa), but also has water absorption rate more than or equal to 125g/m in 24 hours2Far higher than national standard and domestic like products, the highest water absorption rate in 24 hours can exceed 312g/m2And the desorption curvature shows that the moisture releasing speed is high, the moisture releasing capacity is strong, and the response is excellent.
4, the invention prepares the limestone and the waste glass which have poor uniform pore structure and are difficult to synthesize the automatic humidity regulating material into the automatic humidity regulating material, so that abundant limestone mineral products and waste glass in China can be recycled, and the limestone mineral products and the waste glass are directly solidified into indoor wall bricks, ceilings and the like with the automatic humidity regulating function, so that the living comfort can be well improved, the poor body feeling of sultriness, dryness and the like can be avoided, and the social benefit and the economic benefit are very obvious.
Drawings
FIG. 1 is a graph showing the humidity response curves of cured products of example 1 of the present invention with varying calcium chloride contents.
FIG. 2 is a graph showing the change in flexural strength of cured products having different calcium chloride contents in example 1 of the present invention.
FIG. 3 is a graph showing the porosity distribution of the cured product of example 2 of the present invention at different calcium chloride contents.
FIG. 4 is an XRD pattern of the cured product with and without calcium chloride added in example 2 of the present invention.
FIG. 5 is an SEM photograph of a cured product of example 2 of the present invention after the addition of calcium chloride.
FIG. 6 is a graph showing the humidity response of the cured product of example 3 of the present invention for different ratios of waste glass to limestone.
Detailed Description
Example 1
The mixture of the waste glass and the limestone which is selected and screened by a 100-mesh sieve and dried is expressed by cg (wherein the mass percentage of the waste glass to the limestone is 50%: 50%).
In example 1, the influence of different calcium chloride contents on the humidity control performance of the cured product was investigated and analyzed, taking the calcium chloride content as a variable. Firstly, adding a proper amount of calcium chloride (1-15%) into cg, then additionally measuring water or sodium hydroxide solution (the concentration is 2-5 mol/L) accounting for 5-10% of the total weight, uniformly mixing the raw materials according to the proportion, then performing compression molding under an FW-4 type desk type powder tablet press (the molding pressure is 30MPa), and placing the demolded sample into a hydrothermal kettle for hydrothermal curing (the temperature is 200 ℃ and the time is 15 hours). The cured sample (40 mm. times.15 mm. times.6 mm) was dried in an oven at 80 ℃ for 24 hours to give a cured product.
The cured product (sample) was allowed to equilibrate to adsorption by placing it in an environment of 33% Relative Humidity (RH) for 24 h.
Placing NaCl saturated solution with Relative Humidity (RH) of 75% into a closed box, and setting the temperature of the constant temperature and humidity box at 25 deg.C and Relative Humidity (RH) of 75%. When the temperature and the humidity in the constant temperature and humidity box are respectively kept at 25 ℃ and 75%, and the temperature and humidity change does not exceed +/-0.1, the temperature and the humidity in the closed box are considered to be kept stable.
The balance was set to measure the mass of the sample every 10min and the measurement data was automatically entered into the computer.
And quickly placing the sample which is subjected to adsorption balance treatment into a tray of a sample rack in a closed box, then resetting the electronic balance, closing the closed box and the constant-temperature and constant-humidity box simultaneously, and absorbing moisture by the material, wherein the change of the balance value is the change of the moisture absorption quality of the material. The period of the moisture absorption experiment in the humidity response experiment is 24 hours, and when the data is recorded for 24 hours, the saturated solution is changed into MgCl2·6H2O solution, and setting the temperature of a constant temperature and humidity chamber to be 25 ℃ relativelyThe humidity (RH) was 75% so that the RH in the enclosure was controlled at 33%, and the change in mass of the sample was continuously recorded, this time during the dewetting process, which was again 24 hours. From this, a moisture absorption/desorption curve of the sample in one cycle of moisture change with time, i.e., a moisture response curve, can be obtained as shown in fig. 1. As can be seen from fig. 1, when the ambient humidity is higher than 70%, the material will automatically absorb moisture from the environment, so that the ambient humidity is reduced; when the environmental humidity is lower than 40%, the material can automatically release humidity to the environment, so that the environmental humidity is improved, the effect of automatically adjusting the environmental humidity is achieved, the living comfort can be well improved, and the poor body senses of sultriness, dryness and the like are avoided. According to the industrial standard JC-T2082-2011 debugging functional interior building decoration material, the thickness of the product prepared by the invention is more than 3mm, and belongs to the third category, and the measured specific humidity-regulating performance index and the national standard are compared in the following table.
As can be seen from the above table, the cured body without calcium chloride can not meet the national standard, and the humidity control performance of the product is greatly improved after a proper amount of calcium chloride is added: the water absorption capacity of the product added with 3 percent, 5 percent and 10 percent of calcium chloride is respectively 223 percent, 474 percent and 721 percent higher than that of the product without calcium chloride in 24 hours, and is respectively 105 percent, 263 percent and 420 percent higher than the national standard. In addition, the moisture release rate (85%) of the product added with 3% of calcium chloride in 24 hours is higher than 75%, while the moisture release rate of the product added with 5% and 10% of calcium chloride in 24 hours is lower than 75%, but the moisture release rates in 24 hours are respectively 131g/m2And 189g/m2The moisture releasing quantity unit is more than 20g/m2And meets the national standard requirements.
As can be seen from FIG. 2, the flexural strength is reduced with the increasing of the calcium chloride content, but the flexural strength of the product added with 10% of calcium chloride is still over 12MPa (compressive strength 60MPa), which meets the requirements of the corresponding industries. Considering that the humidity-regulating performance of the product is very excellent when 10% of calcium chloride is added, the calcium chloride is not added any more, and 10% of calcium chloride is selected as the optimal value of the series of examples.
Example 2
The effect of the change on the humidity control performance was observed by using the content of calcium chloride as a variable, and the effect of calcium chloride on the humidity control material was studied.
The isothermal adsorption curve types divided by the international chemical union (IUPAC) are analyzed according to the transition material signal principle and the like, and the material with the IV-type isothermal adsorption curve is found to be more suitable to be used as a humidity conditioning material; and the Kelvin and related formulas can be used for deducing the material with the aperture between 3.2nm and 7.4nm, so that the indoor relative humidity can be automatically maintained in the most comfortable range of human body of 40 percent to 70 percent.
A cured product (sample) was obtained in example 1. The experimental results are shown in fig. 3-5, and it can be found from fig. 3 that the theory is really well met, the content of mesopores is continuously increased along with the continuous increase of the content of calcium chloride, especially the content of mesopores with the pore diameter of 3-7.4 nm is greatly increased, which is the main reason for the improvement of the humidity-regulating performance of the product.
With reference to fig. 4, it can be found that the peak near 2 θ ═ 30 ° disappears and the peak near 2 θ ═ 7 ° increases in the XRD pattern after the calcium chloride is added, so that the original flocculent C-S-H gel is promoted to further react and transform into tobermorite, and the tobermorite product can be found to be rich in mesopores through fig. 5. And the lower reaction temperature (less than or equal to 200 ℃) is beneficial to the retention of the mesoporous structure, so that the content of the pore diameter of 3.2-7.4 nm is greatly improved, which is identical with the result of figure 3. Therefore, the series of examples can obtain that the original flocculent C-S-H gel is converted into tobermorite rich in a mesoporous structure along with the increase of the content of calcium chloride, so that the pore diameter is refined, and the main reason for greatly improving the humidity regulation performance of the sample is shown.
On the other hand, as the calcium chloride has the function of deliquescence and moisture absorption, when the calcium chloride is distributed in the mesopores, the calcium chloride has the tendency of attracting water molecules, so that the calcium chloride is easier to adsorb water molecules compared with a product without the calcium chloride, namely, the energy required by adsorption is reduced, the calcium chloride can adsorb more water molecules, and the automatic moisture regulation performance of the product is greatly improved.
By combining the reasons, the calcium chloride can be added in the embodiment 2, so that on one hand, the mesoporous structure is improved, and the content of 3.2-7.4 nm mesopores in the product is greatly increased; on the other hand, the unique deliquescence and water absorption performance of the product can be used, so that the moisture absorption performance of the product can be greatly improved. The main principle of the product for realizing the automatic humidity adjusting function is that.
Example 3
In the embodiment, the calcium chloride content is selected to be 10% unchanged, the mass ratio of the waste glass to the limestone is taken as a variable, the influence of different calcium chloride contents on the humidity regulating performance of the cured sample is researched, and the analysis is carried out.
Firstly, preparing a mixture cg of different waste glass and limestone mass ratios (2: 8-6: 4), and converting the mixture cg into waste glass in percentage by mass: 20% -60% of limestone: 40 to 80 percent. Then adding calcium chloride: and cg (1: 9), adding water or sodium hydroxide solution (the concentration is 2-5 mol/L) accounting for 5-10% of the total weight, uniformly mixing the raw materials according to the proportion, performing compression molding under an FW-4 type bench powder tablet press (the molding pressure is 30MPa), and placing the demolded sample into a hydrothermal kettle for hydrothermal curing (the temperature is 200 ℃ and the time is 15 hours). The cured samples (40 mm. times.15 mm. times.6 mm) were subjected to a humidity response curve test after drying in an oven at 80 ℃ for 24 hours, the test results being shown in FIG. 6.
As can be seen from FIG. 6, as the mass ratio of the waste glass to the limestone is increased, the moisture-controlling property of the product is greatly improved, and when the mass ratio is 1:1, the moisture-controlling property is the best, which can reach 312g/m2. When the mass ratio is continuously increased, the humidifying performance is reduced, which is mainly determined by the content and the growth condition of tobermorite, at the beginning, the content of tobermorite is greatly improved along with the increase of the mass ratio, and the specific mesoporous structure of the tobermorite is very beneficial to the improvement of the humidifying performance; however, when the mass ratio is too high, tobermorite grows excessively, the mesoporous structure is gradually destroyed, and the humidity control performance is greatly reduced. Therefore, the 1:1 ratio of waste glass to limestone was selected as the optimum value for this series of examples.
The equipment required for testing the humidity response curve of the sample is as follows: constant temperature and humidity case: the model JYM-103B, manufactured by Shanghai Jiayu scientific instruments Co., Ltd., adjustable humidity range RH 25-95% +/-1% RH, temperature-15-85 deg.C + -0.2 deg.C; electronic analytical balance: model Shimadzu AUW220, manufacturer Saint Hippocrate instruments & Equipment Ltd, related parameters 220g, 0.1 mg; temperature and humidity recorder: model 179A-TH, manufactured by the manufacturing plant, home-made Exporium precision photoelectricity, with a test range of 0-100% RH + -1.8% RH at-40-100 deg.C + -0.2 deg.C; self-control of a closed box: 30cm × 25cm × 22 cm; the electronic computer: the model is as follows: HSTNC-002L-TC, available from Hewlett packard computer, Inc.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910225619.5A CN110002840B (en) | 2019-03-25 | 2019-03-25 | A kind of method that utilizes calcium chloride to prepare automatic humidity control material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910225619.5A CN110002840B (en) | 2019-03-25 | 2019-03-25 | A kind of method that utilizes calcium chloride to prepare automatic humidity control material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110002840A CN110002840A (en) | 2019-07-12 |
| CN110002840B true CN110002840B (en) | 2021-09-24 |
Family
ID=67167909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910225619.5A Active CN110002840B (en) | 2019-03-25 | 2019-03-25 | A kind of method that utilizes calcium chloride to prepare automatic humidity control material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110002840B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110482975B (en) * | 2019-09-02 | 2021-07-16 | 同济大学 | A kind of preparation method of light-weight high-strength humidity control material |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106927737A (en) * | 2017-03-06 | 2017-07-07 | 同济大学 | A kind of preparation method of lime ground mass high-intensity building materials |
| CN108046738A (en) * | 2017-12-08 | 2018-05-18 | 上海海顾新材料科技有限公司 | A kind of low-temperature setting sea sand is the method for intelligent damping construction material |
-
2019
- 2019-03-25 CN CN201910225619.5A patent/CN110002840B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106927737A (en) * | 2017-03-06 | 2017-07-07 | 同济大学 | A kind of preparation method of lime ground mass high-intensity building materials |
| CN108046738A (en) * | 2017-12-08 | 2018-05-18 | 上海海顾新材料科技有限公司 | A kind of low-temperature setting sea sand is the method for intelligent damping construction material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110002840A (en) | 2019-07-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104403399B (en) | Internal wall putty with humidity-regulating and moistureproof functions | |
| CN102633483B (en) | Composite material with self-regulating function and production method thereof | |
| CN101368014B (en) | Inorganic putty powder with function of governing humidness | |
| CN104841361B (en) | A kind of diatomite/powdered whiting composite humidity adjusting material and preparation method thereof | |
| CN106747162B (en) | A kind of diatom plate and its production technology with photo-catalysis function | |
| Zhou et al. | Eco-friendly hierarchical porous palygorskite/wood fiber aerogels with smart indoor humidity control | |
| Zhou et al. | Experimental study on moisture migration process of zeolite-based composite humidity control material | |
| CN110002840B (en) | A kind of method that utilizes calcium chloride to prepare automatic humidity control material | |
| CN109776055B (en) | Multifunctional environment-friendly zeolite diatom ooze interior wall coating | |
| WO2016065993A1 (en) | Green environmental-friendly tourmaline composite home decoration material and preparation method therefor | |
| CN104892017B (en) | Preparation method of interior wall tile capable of adsorbing indoor formaldehyde gas | |
| JP2007284294A (en) | Plaster material containing powder of scallop shell as main component, its producing method, tile containing powder of scallop shell, and method for producing them | |
| CN102557507A (en) | Method for preparing humidity-adjusting material from loess or sepiolite | |
| CN109503076A (en) | A kind of preparation method of ornament materials and its dalle with releasing negative oxygen ion environmental protection health-preserving function | |
| KR101289273B1 (en) | Composition for interior finish material with eco-friendly and composite regenerative thermal function | |
| CN104402518B (en) | A kind of diatom ceiling with humidity adjusting function and preparation method thereof | |
| Castellano et al. | Assessment of humidity self-regulation functionality for ceramic tiles | |
| CN109627834B (en) | Diatom-based color white base material and surface material for internal wall with functions of ventilation, humidity regulation, sterilization and negative ion release and preparation method of diatom-based color white base material and surface material | |
| CN108484106A (en) | A kind of adjustable wet diatomite ecotecture decorative brick and preparation method | |
| CN109133821B (en) | A kind of rice husk ash-based composite humidity control material and preparation method thereof | |
| CN110482975B (en) | A kind of preparation method of light-weight high-strength humidity control material | |
| CN107382250A (en) | A kind of plasterboard for inducing anion and preparation method thereof | |
| CN101954270B (en) | Formaldehyde absorbent and preparation method thereof | |
| CN107383982A (en) | A kind of negative ion putty powder and preparation method thereof | |
| TW202302494A (en) | Moisture control and anti-slip volcanic rock plate and its preparation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |