Preparation method for porous type polyacrylamide macromolecule hygroscopic material

A technology of polyacrylamide and moisture-absorbing materials, which is applied in the field of preparation of porous polyacrylamide polymer moisture-absorbing materials, which can solve the problems of small saturated moisture absorption capacity and poor moisture absorption rate, and achieve fast regeneration, low energy consumption, and reduced self-volume Effect

Active Publication Date: 2014-08-06
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current polymer moisture-absorbing materials sometimes have disadvantages such as poor moisture absorption rate and small saturated moisture absorption capacity. Therefore, adding a porogen to form a pore structure and increase the specific surface area is an effective method to improve the moisture absorption performance.

Method used

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  • Preparation method for porous type polyacrylamide macromolecule hygroscopic material
  • Preparation method for porous type polyacrylamide macromolecule hygroscopic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Step (1). Put 20g of acrylamide into a beaker, adjust the pH to 7 with sodium hydroxide, then add 2g of porogen urea, 0.02g of sodium bisulfite, 0.02g of ammonium persulfate, 0.2g of N,N'- Methylenebisacrylamide, 74.56g of deionized water, and fully stirred to obtain a mixed solution; pour the mixed solution into a reaction tube, fill it with nitrogen and oxygen in deionized water at 22°C for 30 minutes, and then seal it to obtain a mixed reactant;

[0019] Step (2). Heat the mixed reactant obtained in the above step (1) in a constant temperature water bath at 45° C. to allow it to fully react for 4 hours to obtain a transparent gel-like polymer, which is washed and filtered to obtain the final product;

[0020] Step (3). The final product is sliced, granulated, pore-forming (dried at 100° C. for 4 hours), and pulverized to obtain a porous polyacrylamide polymer hygroscopic material with a thickness of 0.5 cm.

[0021] Step (4). Performance test:

[0022] Hygroscopic p...

Embodiment 2

[0024] Step (1). Put 23g of acrylamide into a beaker, stir evenly, then adjust the pH to 7 with sodium hydroxide, then add 2.3g of porogen polyethylene glycol 200, 0.023g of sodium bisulfite, 0.023g of supernatant Ammonium sulfate, 0.23g N, N'-methylenebisacrylamide, 68.81g deionized water, mixed solution was obtained after fully stirring; the mixed solution was poured into the reaction tube, filled with nitrogen in deionized water at a temperature of 23 ℃ After 30 minutes of oxygen sealing, the mixed reactant was obtained;

[0025] Step (2). Heat the mixed reactant obtained in the above step (1) in a constant temperature water bath at a temperature of 50° C. to allow it to fully react for 4.5 hours to obtain a transparent gel-like polymer, which is washed and filtered to obtain the final product;

[0026] Step (3). The final product is sliced, granulated, pore-forming (dried at 105° C. for 4 hours), and pulverized to obtain a porous polyacrylamide polymer hygroscopic material...

Embodiment 3

[0031] Step (1). Put 26g of acrylamide into a beaker, stir evenly, then adjust the pH to 7 with sodium hydroxide, then add 2.6g of porogen polyethylene glycol 400, 0.026g of sodium bisulfite, 0.026g of supernatant Ammonium sulfate, 0.26g N, N'-methylenebisacrylamide, 64.74g deionized water, mixed solution was obtained after fully stirring; the mixed solution was poured into the reaction tube, filled with nitrogen in deionized water at a temperature of 25 °C After 30 minutes of oxygen sealing, the mixed reactant was obtained;

[0032] Step (2). Heat the mixed reactant obtained in the above step (1) in a constant temperature water bath at a temperature of 55° C. to allow it to fully react for 5 hours to obtain a transparent gel-like polymer, which is washed and filtered to obtain the final product;

[0033] Step (3). The final product is sliced, granulated, pore-forming (dried at 108° C. for 5 hours), and pulverized to obtain a porous polyacrylamide polymer hygroscopic material ...

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Abstract

The invention discloses a preparation method for a porous type polyacrylamide macromolecule hygroscopic material. The preparation method comprises the following steps: putting acrylamide in a reactor, adjusting the pH value to 7 with sodium hydroxide and adding pore-foaming agents, sodium hydrogen sulfite, ammonium persulphate, N, N'-methylene double acrylamide and deionized water to stir sufficiently and obtain a mixed solution; placing the mixed solution in the deionized water for nitrogenization and deoxygenation for 30 min and sealing to obtain a mixed reactant; placing the mixed reactant in thermostatic water for reaction for 4-5 hours to obtain a transparent gel polymer; washing and filtering the transparent gel polymer to obtain a final product; slicing, prilling, pore-forming and smashing the final product to obtain the porous type polyacrylamide macromolecule hygroscopic material. According to the invention, the porous type polyacrylamide macromolecule hygroscopic material is high in moisture absorption efficiency, so that objectively the size is reduced, in addition, the hygroscopic material doesn't produce pollution, is non-corrosive, and has advantages of quick regeneration, low energy consumption and the like.

Description

technical field [0001] The invention relates to an organic polymer moisture-absorbing material, in particular to a preparation method of a porous polyacrylamide polymer moisture-absorbing material. Background technique [0002] Organic polymer moisture-absorbing material is a new type of functional polymer material, which was originally produced by the development of super absorbent resin. It has excellent moisture absorption and moisturizing properties. It is a water-based resin modified by chemical and physical methods. It uses the hydrophilic group in the molecule to absorb water. Organic polymer moisture-absorbing materials have a higher ability to absorb moisture in the air than ordinary inorganic moisture-absorbing materials. The moisture absorption capacity can reach more than 70%, and the moisture absorption speed can reach 2mg / g.min. It is non-corrosive, polluting, and renewable. In addition, the variety of product forms (powder, granular, strip or transparent film...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F222/38C08J9/00
Inventor 张春晓姚志通张素玲
Owner HANGZHOU DIANZI UNIV
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