Composite building humidity-controlling material and preparation method thereof

A humidity-adjusting material and construction technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of small air contact area, inconvenient and stable placement, etc., to achieve enhanced moisture absorption and desorption ability, fast moisture absorption and desorption rate , Promote the effect of physical adsorption

Inactive Publication Date: 2018-04-06
吴刚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention: Aiming at the problem that most of the current humidity control materials are powder, block or granular, if applied to the humidity control of a large space, it is inconvenient and stable to place, and the contact area with the air is relatively small. A composite building humidity control material and its preparation method

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  • Composite building humidity-controlling material and preparation method thereof

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example 1

[0025] Take 10g chitosan, add 1.0kg mass fraction of 2% acetic acid solution, stir at 300r / min until chitosan is completely dissolved, then add 1.0kg mass fraction of 5% benzaldehyde ethanol solution, and stir at 60°C 3h, after the reaction is finished, use a mass fraction of 5% sodium hydroxide solution to adjust the pH to 7, let it stand for 1h and filter to obtain a filter cake, wash the filter cake with absolute ethanol 3 times, then place the filter cake in a drying box, Dry to constant weight at 40°C to obtain N-benzylidene chitosan, take 10g N-benzylidene chitosan, 30mL isopropanol, add 150mL deionized water, stir at 300r / min for 20min, then add 10g of glycidyltrimethylammonium chloride, heat preservation reaction at 80°C for 6h, let stand for 1h after the reaction, and collect the filtrate by filtration, place the filtrate on a rotary evaporator and evaporate to dryness under reduced pressure to obtain a quaternized ammonium shell For polysaccharides, take 10g of quate...

example 2

[0027]Take 13g chitosan, add 1.2kg mass fraction of 2% acetic acid solution, stir at 350r / min until chitosan is completely dissolved, then add 1.2kg mass fraction of 5% benzaldehyde ethanol solution, and stir at 70°C 4h, after the reaction is finished, adjust the pH to 7.5 with a mass fraction of 5% sodium hydroxide solution, let it stand for 1h and filter to obtain a filter cake, wash the filter cake 4 times with absolute ethanol, then place the filter cake in a drying box, Dry to constant weight at 45°C to obtain N-benzylidene chitosan, take 11g N-benzylidene chitosan, 40mL isopropanol, add 175mL deionized water, stir at 350r / min for 25min, then add 11g of glycidyltrimethylammonium chloride, heat preservation reaction at 85°C for 7h, let stand for 1h after the reaction, and collect the filtrate by filtration, place the filtrate on a rotary evaporator and evaporate to dryness under reduced pressure to obtain a quaternized ammonium shell For polysaccharides, take 11g of quater...

example 3

[0029] Take 15g chitosan, add 1.5kg mass fraction of 2% acetic acid solution, stir at 400r / min until chitosan is completely dissolved, then add 1.5kg mass fraction of 5% benzaldehyde ethanol solution, and stir at 80°C 5h, after the reaction is finished, use a mass fraction of 5% sodium hydroxide solution to adjust the pH to 8, filter the filter cake after standing for 2 hours, wash the filter cake 5 times with absolute ethanol, then place the filter cake in a drying box, Dry at 50°C to constant weight to obtain N-benzylidene chitosan, take 12g N-benzylidene chitosan, 50mL isopropanol, add 200mL deionized water, stir at 400r / min for 30min, then add 12g of glycidyltrimethylammonium chloride, heat preservation reaction at 90°C for 8 hours, let stand for 2 hours after the reaction, and collect the filtrate by filtration, place the filtrate on a rotary evaporator and evaporate it to dryness under reduced pressure to obtain a quaternized ammonium shell For polysaccharides, take 12g ...

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Abstract

The invention relates to a composite building humidity-controlling material and a preparation method thereof, and belongs to the technical field of building materials. The humidity-controlling material is prepared from quaternized chitosan modified sepiolite to be compounded with sierozem, ground calcium carbonate, quartz sand and attapulgite. A great number of detrital impurities such as carbonaceous matters, clay minerals and the like covered on the surface of the sepiolite are removed through acidification and purification, so that most of pore structures appear, the pore volume of the sepiolite is obviously increased, and the moisture absorption and release ability of the sepiolite is enhanced. Meanwhile, chitosan is subjected to quaternization modification, so that the moisture absorption is improved. During the cleaning process of pores of the sepiolite, the pores are filled with the chitosan to produce a composite effect with porous structures of the sepiolite, so that the diffusion performance of water vapor on the surface of the material or inside the material is improved, the capillary condensation of the water vapor inside the material is promoted, and the moisture absorption capacity of the material is increased. The humidity-controlling material has faster moisture absorption and release rate, so that the physical adsorption of the material to moisture is promoted,and the moisture absorption capacity is increased to further enhance the moisture absorption and release ability.

Description

technical field [0001] The invention relates to a composite building humidity control material and a preparation method thereof, belonging to the technical field of building materials. Background technique [0002] Air humidity is of great significance to people's living environment, physical and mental health, and the protection of objects. Excessive moisture content in the air can cause discomfort such as dampness and chest tightness; cause metal surface corrosion and lead to a decrease in electrical insulation performance; encourage the proliferation and development of various mold viruses, affect food processing and preservation; affect the production and processing of mechanical parts quality. However, if the air humidity is too low, it will cause skin allergies, dry eyes and nose, and reduce the resistance of the respiratory system. In addition, if the humidity is too low, it will also cause static electricity, which is not conducive to health. When the humidity alte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30
CPCB01J20/10B01J20/103B01J20/12B01J20/24B01J2220/46B01J2220/4806B01J2220/4812B01J2220/4825
Inventor 雷洪云王文新史玉玲
Owner 吴刚
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