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
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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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