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A preparation method of green composite hydrogel with sustained-release purification and sterilization function

A composite hydrogel, slow-release technology, applied in the field of preparation of green composite hydrogel, can solve the problems of human harm, unfriendly environment, etc., and achieve the effect of low cost, fresh smell and simple preparation process

Active Publication Date: 2022-05-03
ZHEJIANG SHUREN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Based on this, the object of the present invention is to provide a slow-release purification method for the possible presence of fungal pollution in indoor air that threatens human health and the existing chemical fumigants are not very friendly to the environment, and formaldehyde is harmful to humans. A method for preparing a green composite hydrogel with a bactericidal function. The method uses nano-cellulose hydrogel as a carrier, which can effectively control the release of air fresheners, absorb formaldehyde, etc., and achieve slow release. , The effect of adsorbing formaldehyde plays a perfect role

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The invention provides a preparation method of a green composite hydrogel with slow-release purification and sterilization functions, comprising the following steps:

[0021] (1) Mix the mixed aqueous solution of 40g sodium hydroxide and hydrogen peroxide with 4g bagasse powder, wherein the mass fraction of sodium hydroxide in the mixed aqueous solution of sodium hydroxide and hydrogen peroxide is 7%, and the mass fraction of hydrogen peroxide is 3%. Stir the reaction on a magnetic stirrer at a speed of 1000r / min for 2h, then place the solution in a constant temperature oil bath at 75°C, and continue the reaction for 4h at a stirring rate of 480r / min to obtain an alkali hydrolyzate, which is washed 3 times with water, Filter to obtain a residue, then add distilled water 15 times the volume of the residue to the residue, and stir at a constant temperature of 65° C. for 15 minutes at a stirring rate of 480 r / min to obtain a mixed solution. Subsequently, the obtained mixed...

Embodiment 2

[0030] The invention provides a preparation method of a green composite hydrogel with slow-release purification and sterilization functions, comprising the following steps:

[0031] (1) The mixed aqueous solution of 50g sodium hydroxide and hydrogen peroxide is mixed with 5g bagasse powder, wherein, the mass fraction of sodium hydroxide in the described sodium hydroxide and hydrogen peroxide mixed aqueous solution is 6%, and the mass fraction of hydrogen peroxide is 2%. Stir the reaction on a magnetic stirrer at a speed of 1200r / min for 3h, then place the solution in a constant temperature oil bath at 75°C, and continue the reaction for 5h at a stirring rate of 500r / min to obtain an alkali hydrolyzate, which is washed 3 times with water, Filter to obtain a residue, then add distilled water 15 times the volume of the residue to the residue, and stir at a constant temperature of 75° C. for 10 minutes at a stirring rate of 500 r / min to obtain a mixed solution. Subsequently, the o...

Embodiment 3

[0040] The invention provides a preparation method of a green composite hydrogel with slow-release purification and sterilization functions, comprising the following steps:

[0041] (1) The mixed aqueous solution of 60g sodium hydroxide and hydrogen peroxide is mixed with 5g bagasse powder, wherein, the mass fraction of sodium hydroxide is 10% in the described sodium hydroxide and hydrogen peroxide mixed aqueous solution, and the mass fraction of hydrogen peroxide is 5%. Stir the reaction on a magnetic stirrer at a speed of 1200r / min for 4h, then place the solution in a constant temperature oil bath at 80°C, and continue the reaction for 4h at a stirring rate of 500r / min to obtain an alkali hydrolyzate, which is washed 5 times with water, Filter to obtain a residue, then add distilled water 20 times the volume of the residue to the residue, and stir at a constant temperature of 70° C. for 20 minutes at a stirring rate of 500 r / min to obtain a mixed solution. Subsequently, the ...

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Abstract

The invention provides a preparation method of a green composite hydrogel with slow-release purification and sterilization functions, and belongs to the technical field of hydrogels. In the preparation method, tea tree oil, Sorbus nigra extract, crude pomelo peel extract, and water are added to glycerin, and stirred evenly to obtain a mixed oil solution; then sodium chloride and water are added, mixed evenly, and then added dropwise to The prepared nanocellulose suspension was finally placed in an environment of 4° C. to obtain a green composite hydrogel. The green composite hydrogel obtained by the invention slowly releases and embeds natural plant components, has the functions of purifying and sterilizing, inhibiting bacteria, and adsorbing formaldehyde, and has a fresh and pleasant smell, has no harm to the human body, does not cause allergies, and is green and environmentally friendly. Friendly to the environment.

Description

technical field [0001] The invention belongs to the technical field of daily-use chemical products, and in particular relates to a preparation method of a green composite hydrogel with slow-release purification and sterilization functions. Background technique [0002] According to surveys, modern people spend 90% of their time living and working indoors on average, and the quality of indoor air quality will directly affect the health of the human body. With the development of modern industry and the rapid development of urbanization, the indoor air pollution in modern cities is severe. Countries have successively detected 500 kinds of toxic and harmful substances in indoor air, and more than 20 kinds of them have been identified as carcinogens. Among them, there may also be fungal pollution in modern families, which may cause people to have allergic diseases. Although allergic reactions will not immediately cause direct harm to the human body, it will bring long-term troubl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/075C08L1/02C08L91/00C08K3/16C08K5/053
CPCC08J3/075C08J2301/02C08J2491/00C08J2391/00C08J2401/02C08K3/16C08K5/053
Inventor 张雯叶慧媛陆胤王鑫秦玫石飞扬
Owner ZHEJIANG SHUREN UNIV
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