CN102951925A - Diatomaceous earth matrix porous material with humidifying function and preparation method thereof - Google Patents
Diatomaceous earth matrix porous material with humidifying function and preparation method thereof Download PDFInfo
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- CN102951925A CN102951925A CN2012104920831A CN201210492083A CN102951925A CN 102951925 A CN102951925 A CN 102951925A CN 2012104920831 A CN2012104920831 A CN 2012104920831A CN 201210492083 A CN201210492083 A CN 201210492083A CN 102951925 A CN102951925 A CN 102951925A
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Abstract
The invention belongs to the field of environmental-friendly construction materials and particularly relates to a diatomaceous earth matrix porous material with a humidifying function and a preparation method thereof. The diatomaceous earth matrix porous material comprises the following raw materials in percentage by weight: 70-95% of diatomaceous earth, 0-15% of attapulgite or sepiolite and 5-30% of organic pore forming agent, wherein the specific surface area is 15-80 m<2>/g, the moisture absorption rate in 24 hours is higher than 8% under the condition of the relative humidity of 85%, and the moisture liberation rate in 24 hours is higher than 5% under the condition of the relative humidity of 35%. The preparation method of the diatomaceous earth matrix porous material comprises the steps that the diatomaceous earth, attapulgite and the organic pore forming agent with weight percentage of 5-30% are mixed, water is added to the mixture, the mixture is formed into green bricks by pressing, and the green bricks are calcined for 1-4 hours at the temperature of 600-1100 DEG C. By adding organic pore forming agent and adopting low temperature calcination, the disadvantage that the original micropore structure of the diatomaceous earth is damaged by high temperature calcination is overcome, and the diatomaceous earth can provide special hydrophilic surface, so that the diatomaceous earth matrix porous material with the humidifying function plays a remarkable effect in controlling the environmental humidity in a building, and also has the functions of air purification, fireproofing and aesthetics.
Description
Technical field
The invention belongs to the environmental-friendly construction material field, be specifically related to a kind of humidity conditioning function Diatomite-based Porous material and preparation method thereof that has.
Background technology
Humidity is the environmental parameters of equal importance with temperature; too high or too low humidity not only can affect the life-span of buildings; and occupant's health brought detrimentally affect; too high mould, acceleration buildings and the upholstery of growing easily of humidity corrodes; and too drying then causes respiratory system and allergic easily; humidity also affects human perception to temperature; high humidity environment makes the people produce sultry sensation easily; thereby control the suitable humidity of living environment and not only can protect buildings and occupant's health, and can play the effect of building energy-saving.
At present the method for humidity mainly contains mechanical active adjustment and adopts two kinds of passive regulative modes with moisture adsorption and releasing functional materials in the control buildings, the latter compares the former and does not need the power consumption energy and noise-less pollution, is moisture control mode in a kind of eco-friendly buildings.
At present, preparing the technology with humidity conditioning function porous ceramics material of construction take diatomite as raw material mainly is to adopt inorganic salt to add in the diatomite as additive, and high-temperature calcination, this method easily causes the diatomaceous 5-15nm aperture that moisture adsorption and releasing play a decisive role is disappeared.Application number is that 200610046325.9 Chinese patent " diatomite inner wall brick and preparation technology thereof " mixes by base, baking operation with the smart soil of diatomite, super-cell, yellow soda ash, water glass, a ° C roasting prepares diatomite inner wall brick 1000 ° of C～1200, because diatomaceous moisture adsorption and releasing ability mainly depends on the aperture less than the aperture of 20 nm, higher maturing temperature makes the diatomite aperture disappear easily, thereby loses the ability of moisture adsorption and releasing; Application number is that 201110356267.0 Chinese patent " a kind of decorative block take diatomite as main component " discloses take diatomite 20%-40% and terra alba 50%-70% as main raw material, utilize the solid characteristics of terra alba chance water-setting to solidify by reverse mould and the difform decorative block of oven dry preparation under 70-90 ° of C, because matrix is the poor gypsum of ventilation property, the mode that water vapor is difficult to spread passes in and out diatomaceous natural duct, thereby is difficult to that higher moisture absorption and desorption property is arranged; Application number is that 201110403109.6 Chinese patent " a kind of making method of diatomite for interior decoration and product " discloses take the smart soil of the diatomite of 66-89% as raw material, mixing afterwards with titanium dioxide, tourmalinite, water glass, water, pressed compact, drying, sintering make the upholstery brick, the brick of the method preparation only can make the diatomite performance moisture adsorption and releasing function on surface, because the passage that does not have water vapor diffusion to come in and go out, the following diatomite in brick top layer can not participate in bringing into play the function of moisture adsorption and releasing.
Summary of the invention
Problem for the prior art existence, the invention provides a kind of Diatomite-based Porous material with humidity conditioning function and preparation method thereof, purpose be by introduce organic pore-forming agents that a kind of easy burning loses prepare a kind ofly not only remained with aperture that moisture adsorption and releasing are played a decisive role, but also have can be for the Diatomite-based Porous material of the macropore of water vapor diffusion transmission.
The technical scheme that realizes goal of the invention is:
A kind of have a humidity conditioning function Diatomite-based Porous material, and its material composition mass percent is diatomite 70～95%, attapulgite or sepiolite 0～15%, organic pore-forming agents 5～30%, and its specific surface area is 15-80 m
2/ g, relative humidity is that lower 24 hours rate of moisture absorption of 85% condition are higher than 8%, relative humidity is that lower 24 hours moisture releasing rates of 35% condition are higher than 5%.
Described organic pore-forming agents is could be by the organism of burn off, such as starch and glucose more than the C at 300 °.
A kind of preparation method with humidity conditioning function porous ceramic film material carries out according to following steps:
(1) diatomite original ore after will drying is pulverized, according to mass percent diatomite 70～95%, Attapulgite stone flour or sepiolite powder 0～15%, organic pore-forming agents 5～30%, in mixer, be uniformly mixed to form mixed powder with attapulgite or sepiolite, organic pore-forming agents;
(2) add the entry step mixed-shaped resulting mixture of going forward side by side in the mixed powder, the add-on of water is the mass ratio 5%～35% of mixed powder;
(3) the working pressure machine is pressed into adobe with said mixture under 2-100MPa, and adobe is sent in the calcining kiln, and calcining is 1-4 hour under 600-1100 ° of C, and cooling obtains having humidity conditioning function Diatomite-based Porous material.
Described organic pore-forming agents is could be by the organism of burn off, such as starch and glucose more than the C at 300 °.
Compared with prior art, characteristics of the present invention and beneficial effect are:
The ambient moisture controlled material that adopts is at present often added the easy material that forms crystal water of being combined with water vapor such as inorganic salt or gypsum, but this part crystal water often can not be emitted the water molecules of absorption in time air dried the time, but also may saltout and buildings is played certain corrosive nature, technical scheme of the present invention can effectively be avoided the problems referred to above.
Diatomaceous main component is non-crystalline silica, the surface forms hydrophilic oh group easily, the formation radius-of-curvature is the liquid level of negative value under the condition that exists less than 20 nm micropores having, according to Kelvin equation as can be known under uniform temp concave meniscus place fit saturated vapor pressure less than the plane, be that water vapor has reached supersaturation thereby condensed into liquid in diatomaceous micropore, thereby reach the purpose of moisture absorption, because this process only is subjected to the impact of micropore radius-of-curvature and temperature, thereby the water that condenses under drying conditions is released again easily, for the comfortable humidity condition of human body, it is that material has the key of moisture control to the human body comfort standard less than the micropores of 20 nm in a large number that the control material makes wherein rich.
Technical scheme of the present invention has overcome the shortcoming that the high-temperature calcination meeting damages the original microvoid structure of diatomite by adding organic pore-forming agents and low-temperature sintering, add the hydrophilic surface of the uniqueness that diatomite provides, thereby can become the material that a kind of effect is controlled ambient moisture in the buildings significantly, have purifying air, fire prevention and aesthetic function concurrently.
Description of drawings
Fig. 1 is the internal structure surface sweeping electromicroscopic photograph that the embodiment of the invention 1 preparation has humidity conditioning function Diatomite-based Porous material;
Fig. 2 is that the embodiment of the invention 1 preparation has the graph of pore diameter distribution of humidity conditioning function Diatomite-based Porous material;
Fig. 3 be the embodiment of the invention 1 preparation have a humidity conditioning function Diatomite-based Porous material be respectively moisture absorption and desorption property under 83RH% and the 35RH% condition in humidity;
Fig. 4 is the isothermal nitrogen adsorption line that the embodiment of the invention 2 preparations have humidity conditioning function Diatomite-based Porous material;
Fig. 5 is that the embodiment of the invention 2 preparation has humidity conditioning function Diatomite-based Porous material and is respectively moisture adsorption and releasing curve under 83RH% and the 35RH% condition in humidity.
Embodiment
The diatomite that the embodiment of the invention adopts originates from vain area of Jilin governor;
The instrument that the present invention adopts the Diatomite-based Porous material internal structure observation for preparing among the embodiment is the surface sweeping electron microscope (JSM-6510A) that NEC is produced;
Pore size distribution utilizes the nitrogen adsorption method to test at U.S. Micromeritics company's T riStarII 3020 pore analysis instrument;
Moisture absorption and moisture releasing performance to material in the embodiment of the invention are tested as follows: with sample dry 10 hours removal surface waters under 150 ° of C conditions, then the sample of getting certain mass (about 10 g) places that relative humidity is 83%, room temperature environment, and utilize the equal a record quality change of sample of thousandth sky, be spaced apart 1 minute writing time; Moisture absorption is taken out sample it is placed the continuous moisture releasing of 35% relative humidity environment 24 hours again after 24 hours, change with moisture absorption process the same terms recording quality; With relative variation of quality the time mapping is namely got the moisture adsorption and releasing curve.
Embodiment 1
(1) diatomite original ore after will drying is pulverized, and is uniformly mixed to form mixed powder according to mass percent diatomite 90% and starch 10% in mixer;
(2) press the mass ratio 5% of mixed powder, add the entry step mixed-shaped resulting mixture of going forward side by side in the mixed powder;
(3) the working pressure machine is pressed into said mixture the adobe of 10 cm * 18 cm * 8 mm under 50MPa, and adobe is sent in the calcining kiln, and calcining is 3 hours under 800 ° of C, and cooling obtains having damping Diatomite-based Porous material.
Its internal structure surface sweeping Electronic Speculum pattern as shown in Figure 1, aperture structure distributes as shown in Figure 2, can find out the even aperture distribution of material, and concentrate on＜yardstick of 20nm that its BET specific surface area is 50.6 m
2G
-1Humidity be respectively under 83RH% and the 35RH% condition moisture absorption and desorption property as shown in Figure 3, under relative humidity 83% environment moisture absorption after 24 hours moisture uptake can reach more than 8%, relative humidity is that lower 24 hours moisture releasing rates of 35% condition are higher than 5%.
(1) diatomite original ore after will drying is pulverized, and is uniformly mixed to form mixed powder according to mass percent diatomite 85%, attapulgite 10% and glucose 5% in mixer;
(2) press the mass ratio 20% of mixed powder, add the entry step mixed-shaped resulting mixture of going forward side by side in the mixed powder;
(3) the working pressure machine is pressed into said mixture the adobe of 10 cm * 18 cm * 8 mm under 50MPa, and adobe is sent in the calcining kiln, and calcining is 2 hours under 850 ° of C, and cooling obtains having damping Diatomite-based Porous material.
Its nitrogen adsorption isotherm as shown in Figure 4, the BET specific surface area is 20.1 m
2G
-1Humidity be respectively under 83RH% and the 35RH% condition moisture absorption and desorption property as shown in Figure 5, as can be seen from the figure under relative humidity 83% environment moisture absorption after 24 hours moisture uptake can reach more than 8%, relative humidity is that lower 24 hours moisture releasing rates of 35% condition are higher than 5%.。
Embodiment 3
(1) diatomite original ore after will drying is pulverized, and is uniformly mixed to form mixed powder according to mass percent diatomite 70% and starch 30% in mixer;
(2) press the mass ratio 35% of mixed powder, add the entry step mixed-shaped resulting mixture of going forward side by side in the mixed powder;
(3) the working pressure machine is pressed into said mixture the adobe of 10 cm * 18 cm * 8 mm under 40MPa, and adobe is sent in the calcining kiln, and calcining is 4 hours under 600 ° of C, and cooling obtains having damping Diatomite-based Porous material.
Through verification experimental verification, its specific surface area is 15 m
2/ g, relative humidity is that lower 24 hours rate of moisture absorption of 85% condition are higher than 8%, relative humidity is that lower 24 hours moisture releasing rates of 35% condition are higher than 5%.
Embodiment 4
(1) diatomite original ore after will drying is pulverized, and is uniformly mixed to form mixed powder according to mass percent diatomite 95% and glucose 5% in mixer;
(2) press the mass ratio 25% of mixed powder, add the entry step mixed-shaped resulting mixture of going forward side by side in the mixed powder;
(3) the working pressure machine is pressed into said mixture the adobe of 10 cm * 18 cm * 8 mm under 70MPa, and adobe is sent in the calcining kiln, and calcining is 1 hour under 1100 ° of C, and cooling obtains having damping Diatomite-based Porous material.
Through verification experimental verification, its specific surface area is 80 m
2/ g, relative humidity is that lower 24 hours rate of moisture absorption of 85% condition are higher than 8%, relative humidity is that lower 24 hours moisture releasing rates of 35% condition are higher than 5%.
(1) diatomite original ore after will drying is pulverized, and is uniformly mixed to form mixed powder according to mass percent diatomite 75%, sepiolite 15% and glucose 10% in mixer;
(2) press the mass ratio 30% of mixed powder, add the entry step mixed-shaped resulting mixture of going forward side by side in the mixed powder;
(3) the working pressure machine is pressed into said mixture the adobe of 10 cm * 18 cm * 8 mm under 50MPa, and adobe is sent in the calcining kiln, and calcining is 1.5 hours under 1000 ° of C, and cooling obtains having damping Diatomite-based Porous material.
Its specific surface area is 30.5 m
2/ g, relative humidity is that lower 24 hours rate of moisture absorption of 85% condition are higher than 8%, relative humidity is that lower 24 hours moisture releasing rates of 35% condition are higher than 5%.
Claims (4)
1. one kind has humidity conditioning function Diatomite-based Porous material, it is characterized in that the material composition mass percent is diatomite 70～95%, attapulgite or sepiolite 0～15%, organic pore-forming agents 5～30%, and its specific surface area is 15-80 m
2/ g, relative humidity is that lower 24 hours rate of moisture absorption of 85% condition are higher than 8%, relative humidity is that lower 24 hours moisture releasing rates of 35% condition are higher than 5%.
2. a kind of humidity conditioning function Diatomite-based Porous material that has according to claim 1 is characterized in that described organic pore-forming agents is could be by the organism of burn off, such as starch and glucose more than the C at 300 °.
3. one kind has humidity conditioning function Diatomite-based Porous material preparation method, it is characterized in that carrying out according to following steps:
(1) diatomite original ore after will drying is pulverized, according to mass percent diatomite 70～95%, Attapulgite stone flour or sepiolite powder 0～15%, organic pore-forming agents 5～30%, in mixer, be uniformly mixed to form mixed powder with attapulgite or sepiolite, organic pore-forming agents;
(2) add the entry step mixed-shaped resulting mixture of going forward side by side in the mixed powder, the add-on of water is the mass ratio 5%～35% of mixed powder;
(3) the working pressure machine is pressed into adobe with said mixture under 2-100MPa, and adobe is sent in the calcining kiln, and calcining is 1-4 hour under 600-1100 ° of C, and cooling obtains having humidity conditioning function Diatomite-based Porous material.
4. a kind of humidity conditioning function Diatomite-based Porous material preparation method that has according to claim 3 is characterized in that described organic pore-forming agents is could be by the organism of burn off, such as starch and glucose more than the C at 300 °.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104276841A (en) * | 2013-07-03 | 2015-01-14 | 济南大学 | Zeolite mineral slag based adsorption type particle electrode and preparation method thereof |
| CN104499678A (en) * | 2014-12-18 | 2015-04-08 | 营口渤海科技有限公司 | Plain diatomite ornamental brick with porous organic pattern on surface and manufacturing method of said brick |
| CN104495855A (en) * | 2014-12-18 | 2015-04-08 | 营口渤海科技有限公司 | Diatomite capable of controlling humidity absorbing and releasing performance by illumination and preparation method thereof |
| CN104860399A (en) * | 2015-05-21 | 2015-08-26 | 环境保护部南京环境科学研究所 | Nano porous brick for purifying heavily polluted city watercourse water as well as preparation method and application of brick |
| CN105712710A (en) * | 2014-12-02 | 2016-06-29 | 辽宁利永盛新材料有限公司 | Preparation method of stable and harmless breathing brick veneer |
| CN108689638A (en) * | 2018-06-19 | 2018-10-23 | 苏州中材非金属矿工业设计研究院有限公司 | A kind of multifunctional foam adsorption plate and preparation method thereof |
| CN114149248A (en) * | 2021-11-05 | 2022-03-08 | 东莞哈珀科技有限公司 | Porous ceramic material, preparation method thereof, heating assembly, atomizer and electronic cigarette |
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| CN102391011A (en) * | 2011-08-10 | 2012-03-28 | 华南理工大学 | Preparation method of diatomite-based porous ceramic microspheres |
Non-Patent Citations (1)
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104276841A (en) * | 2013-07-03 | 2015-01-14 | 济南大学 | Zeolite mineral slag based adsorption type particle electrode and preparation method thereof |
| CN104276841B (en) * | 2013-07-03 | 2016-03-02 | 济南大学 | A kind of zeolite slag-based adsorptive type granule electrode and preparation method thereof |
| CN105712710A (en) * | 2014-12-02 | 2016-06-29 | 辽宁利永盛新材料有限公司 | Preparation method of stable and harmless breathing brick veneer |
| CN104499678A (en) * | 2014-12-18 | 2015-04-08 | 营口渤海科技有限公司 | Plain diatomite ornamental brick with porous organic pattern on surface and manufacturing method of said brick |
| CN104495855A (en) * | 2014-12-18 | 2015-04-08 | 营口渤海科技有限公司 | Diatomite capable of controlling humidity absorbing and releasing performance by illumination and preparation method thereof |
| CN104495855B (en) * | 2014-12-18 | 2016-05-18 | 营口渤海科技有限公司 | Diatomite of a kind of illumination control moisture absorption and desorption property and preparation method thereof |
| CN104499678B (en) * | 2014-12-18 | 2016-09-28 | 营口渤海科技有限公司 | Surface kieselguhr vegetarian noodles decorations brick being covered with porous organic membrane pattern and preparation method thereof |
| CN104860399A (en) * | 2015-05-21 | 2015-08-26 | 环境保护部南京环境科学研究所 | Nano porous brick for purifying heavily polluted city watercourse water as well as preparation method and application of brick |
| CN108689638A (en) * | 2018-06-19 | 2018-10-23 | 苏州中材非金属矿工业设计研究院有限公司 | A kind of multifunctional foam adsorption plate and preparation method thereof |
| CN114149248A (en) * | 2021-11-05 | 2022-03-08 | 东莞哈珀科技有限公司 | Porous ceramic material, preparation method thereof, heating assembly, atomizer and electronic cigarette |
| CN114149248B (en) * | 2021-11-05 | 2023-05-12 | 东莞哈珀科技有限公司 | Porous ceramic material and preparation method thereof, heating component, atomizer and electronic cigarette |
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Application publication date: 20130306 |