Variable-color and high-effective composite humidity controlling agent and its preparation method

A humidity control agent and color-changing technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of poor moisture release performance of color-changing silica gel, and achieve the effect of reducing humidity fluctuations

Inactive Publication Date: 2012-05-02
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current humidity control materials do not have such characteristics; and the color-changing silica gel has the problem of poor moisture release performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Roast the diatomite raw material at 600°C for 60min; then put it into 70wt%H 2 SO 4 Soak in aqueous solution for 4 hours at 100°C. Then, the above-mentioned diatomite was added to 2wt% cetyltrimethylammonium bromide (CTAB) aqueous solution, and stirred at 60°C for 2h; after cooling, washing, vacuum drying at 80°C for 60min and grinding and crushing, the Organomodified diatomaceous earth is available.

[0022] (2) Prepare a NaOH aqueous solution with a mass fraction of 25%, and slowly drop the metered NaOH solution into acrylic acid under ice-water bath conditions to obtain an acrylic acid-sodium acrylate solution with a neutralization degree of 70%; then press the sum of acrylic acid and sodium acrylate The mass ratio of acrylamide to acrylamide is 1:2, and the required acrylamide is added to the above solution to prepare a monomer solution. Then, organically modified diatomite with 20% mass of the monomer solution was added into the monomer solution for stirring...

Embodiment 2

[0026] (1) Roast the diatomite raw material at 600°C for 60min; then put it into 70wt%H 2 SO 4Soak in aqueous solution for 4 hours at 100°C. Then, the above-mentioned diatomaceous earth was added to 2wt% cetyltrimethylammonium bromide (CTAB) aqueous solution, and stirred at 60°C for 2h; after cooling, washing, vacuum drying at 80°C for 60min and grinding and crushing, the Organomodified diatomaceous earth is available.

[0027] (2) Prepare a NaOH aqueous solution with a mass fraction of 25%, and slowly drop the metered NaOH solution into acrylic acid under ice-water bath conditions to obtain an 80% neutralization degree of acrylic acid-sodium acrylate solution; then press the sum of acrylic acid and sodium acrylate The mass ratio of acrylamide to acrylamide is 5:4, and the required acrylamide is added to the above solution to prepare a monomer solution. Then, organically modified diatomite with a mass of 30% of the monomer solution was added into the monomer solution for st...

Embodiment 3

[0031] (1) Roast the diatomite raw material at 600°C for 60min; then put it into 70wt%H 2 SO 4 Soak in aqueous solution for 4 hours at 100°C. Then, the above-mentioned diatomaceous earth was added to 2wt% cetyltrimethylammonium bromide (CTAB) aqueous solution, and stirred at 60°C for 2h; after cooling, washing, vacuum drying at 80°C for 60min and grinding and crushing, the Organomodified diatomaceous earth is available.

[0032] (2) Prepare a NaOH aqueous solution with a mass fraction of 25%, and slowly drop the metered NaOH solution into acrylic acid under ice-water bath conditions to obtain an acrylic acid-sodium acrylate solution with a neutralization degree of 90%; then press the sum of acrylic acid and sodium acrylate The mass ratio of acrylamide to acrylamide is 2:1 and the required acrylamide is added to the above solution to prepare a monomer solution. Then, organically modified diatomite with 50% mass of the monomer solution was added into the monomer solution for ...

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Abstract

The invention discloses a variable-color and high-effective composite humidity controlling agent and its preparation method. The preparation method provided by the invention comprises the following steps of: using diatomite, sodium acrylate and acrylamide as raw materials to prepare a diatomite / poly(acrylic acid-acrylamide) composite humidity controlling material with high moisture capacity and humidity controlling capability by a reversed phase suspension polymerization method; immersing the composite humidity controlling material into a cobaltous chloride or gentian violet solution for absorption to saturation, separating, crushing, granulating, and drying to obtain a finished product. The scheme provided by the invention is used to overcome insufficiencies in the prior art and provide and prepare the humidity controlling agent which has high moisture capacity and humidity controlling capability. In addition, the moisture content of the humidity controlling agent can be reflected through appearance color variation, thus reaching the purpose of adjusting the humidity controlling capability of the humidity controlling agent by timely heating treatment and minimizing humidity fluctuation of cultural relic storage space to the greatest extent.

Description

technical field [0001] The invention relates to a humidity-regulating agent and a preparation method thereof, in particular to a color-changing, high-efficiency composite humidity-conditioning agent and a preparation method thereof. Background technique [0002] With the improvement of people's awareness of cultural heritage protection and the development of museums, art galleries, libraries and other industries, improving and controlling the preservation environment of cultural relics or objects is an important link and basic requirement for delaying the aging and damage of cultural relics and implementing cultural relics protection. The main environmental factors affecting the protection effect of cultural relics or objects include temperature, humidity, light, air pollution and microorganisms. Among them, besides temperature, humidity is the most basic influencing factor. Under normal circumstances, the relative humidity requirement for the preservation environment of cu...

Claims

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Application Information

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IPC IPC(8): C08L33/02C08L33/26C08K9/04C08K3/34C09K3/00
Inventor 王吉会郭孟洁任曙凭
Owner TIANJIN UNIV
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