Preparation method for compound porous mineral humidifying materials with excellent moisture absorption performance

A technology of porous minerals and hygroscopic properties, applied in separation methods, alkali metal compounds, chemical instruments and methods, etc., can solve the problems of high manufacturing cost, short functional life, hysteresis, etc., to improve moisture absorption, increase contact area, Good moisture absorption effect

Inactive Publication Date: 2018-05-04
ANHUI HONGSHI OPTOELECTRONICS HIGH TECH CO LTD
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, composite materials with humidity control function are mainly divided into five categories: first, special silica gel, which has outstanding moisture absorption capacity and moisture absorption speed, but the analysis process presents a more serious hysteresis than moisture absorption; second, inorganic salts, with With the increase of moisture absorption, it will slowly deliquify itself; third, organic polymer materials, the moisture absorption and desorption speed are affected by the expansion speed of polymer, so the manufacturi

Method used

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Embodiment Construction

[0023] A method for preparing a composite porous mineral moisture-conditioning material with excellent hygroscopic performance, based on mixing expanded perlite and activated sepiolite, using calcium chloride as a modifier, impregnating and modifying the mixed material, and drying Instantly.

[0024] Specific steps are as follows:

[0025] (1) Pretreatment of expanded perlite:

[0026] Sieve 25 parts by weight of expanded perlite with a sieve to obtain particles with a particle size of 30 mesh, then wash it with 5% NaOH solution for 4 times, then wash it repeatedly with distilled water until the pH value is neutral, and dry it in an oven at 105°C until constant. heavy, spare;

[0027] (2) Acidification treatment of sepiolite:

[0028] Add 50 parts of sepiolite to 350 parts of distilled water, stir at room temperature for 8 hours to hydrate, let it stand for 40 minutes, filter and dry, add a certain concentration of strong acid solution, mix well, and carry out at 70°C Heat...

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Abstract

The invention discloses a preparation method for compound porous mineral humidifying materials with excellent moisture absorption performance. On the basis of the mixing expanded perlite and activatedsepiolite, calcium chloride is taken as modifier; after mixed materials are subjected to impregnation modification, drying is carried out. The sepiolite subjected to modified treatment by acid has alarge specific surface area and total pore volume, and therefore, the sepiolite has better moisture absorption and initial moisture absorption rate in a low moisture range; in a high moisture range, the capillary condensation amount of the expanded perlite with a large aperture is greater than the capillary condensation amount of the sepiolite. The prepared compound humidifying material has good moisture absorption performance under various moisture environments, in addition, calcium chloride which is deposited on the surface of the porous mineral can generate hydration reaction with vapour, and physical absorption and chemical adsorption in the humidifying materials are mutually accelerated so as to improve the moisture adsorption amount of the humidifying materials.

Description

technical field [0001] The invention relates to the preparation of a self-humidity-regulating material, in particular to a method for preparing a composite porous mineral humidity-regulating material with excellent hygroscopic performance. Background technique [0002] Air humidity is an important environmental parameter closely related to people's life and production, and it has attracted people's attention day by day. Excessive humidity in the air can cause discomfort such as dampness and chest tightness, induce arthritis and other diseases, cause metal surface corrosion, lead to a decrease in electrical insulation performance, and affect the production and quality of mechanical parts. However, if the air temperature is too low, it will cause skin allergies, dry eyes and nose, cause respiratory infection and asthma and other diseases to invade, and also cause static electricity. The use of humidity-regulating materials can rely on its own moisture absorption and desorptio...

Claims

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Application Information

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IPC IPC(8): B01J20/12B01J20/28B01J20/30B01D53/28B01D53/02
CPCB01D53/261B01D53/28B01J20/046B01J20/106B01J20/12B01J20/28054
Inventor 徐道际张建波张成文邓书醒肖杰
Owner ANHUI HONGSHI OPTOELECTRONICS HIGH TECH CO LTD
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