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Chlorine dioxide sustained-release material and preparation method thereof

A technology of chlorine dioxide and slow-release materials, applied in botany equipment and methods, chemicals for biological control, biocides, etc., can solve the problems of greenness, non-toxicity, network structure damage, easy decomposition, etc., and achieve experimental Simple and convenient operation, stable sustained-release concentration curve, and easy industrial production

Pending Publication Date: 2021-11-30
长沙尚洁环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the price of sodium polyacrylate resin is low, this ionic water-absorbing resin is easy to decompose under the acidic environment of chlorine dioxide, resulting in the destruction of the network structure, which is not convenient to be used as a long-acting slow-release agent, and the cost of NaY molecular sieve is also relatively high
[0005] To sum up, at present, the preparation process of chlorine dioxide sustained-release resin is still not completely green and non-toxic, and it is still difficult to achieve long-term sustained release. Therefore, it is still necessary to optimize the preparation technology and process of the sustained-release agent

Method used

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  • Chlorine dioxide sustained-release material and preparation method thereof
  • Chlorine dioxide sustained-release material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The first step: preparation of water-absorbent resin

[0029] Measure 40ml of butyl acetate, add it into a 100ml round bottom flask, weigh 4g of polyvinyl alcohol and 6g of maleic anhydride solids respectively according to the mass ratio of 1:1.5, add polyvinyl alcohol into the round bottom flask and stir evenly, and then add to the round bottom flask Add maleic anhydride into the bottom flask, stir to dissolve, then heat up to 85°C in an oil bath, and react with constant temperature stirring for 2.5h. Weigh 5g of sodium hydroxide and 35g of absolute ethanol, transfer the sodium hydroxide and absolute ethanol to a beaker and stir to dissolve for later use.

[0030] The polymer obtained by the constant temperature reaction was transferred to a clean beaker, and 10 ml of absolute ethanol was added for washing. The washed solid is transferred to the above-mentioned beaker filled with sodium hydroxide-ethanol solution, saponified for 30min under constant stirring, and then...

Embodiment 2

[0034] The first step: preparation of water-absorbent resin

[0035] Measure 40ml of toluene, add it into a 100ml round bottom flask, weigh 4g of polyvinyl alcohol and 8g of maleic anhydride solid according to the mass ratio of 1:2, add polyvinyl alcohol into the round bottom flask and stir evenly, and dissolve the maleic anhydride solid Dissolve in acetone, add it into a round-bottomed flask after completely dissolving, stir and dissolve, heat up to 85°C in an oil bath, and react with constant temperature stirring for 2 hours. Weigh 5g of sodium hydroxide and 35g of absolute ethanol, transfer the sodium hydroxide and absolute ethanol to a beaker and stir to dissolve for later use.

[0036] The polymer obtained by the constant temperature reaction was transferred to a clean beaker, and 10 ml of absolute ethanol was added for washing. The washed solid is transferred to the above-mentioned beaker filled with sodium hydroxide-ethanol solution, saponified for 30min under constant...

Embodiment 3

[0040] The first step: preparation of water-absorbent resin

[0041] Measure 40ml of ethanol, add it into a 100ml round bottom flask, weigh 4g of polyvinyl alcohol and 0.1g of glutaraldehyde solution respectively according to the mass ratio of 1:1.5, add polyvinyl alcohol into the round bottom flask and stir evenly, and then pour into the round bottom Add glutaraldehyde solution into the flask, stir to dissolve, heat up to 70°C in an oil bath, and react with constant temperature stirring for 2.5 hours. Weigh 5g of sodium hydroxide and 35g of absolute ethanol, transfer the sodium hydroxide and absolute ethanol to a beaker and stir to dissolve for later use.

[0042] The polymer obtained by the constant temperature reaction was transferred to a clean beaker, and 10 ml of absolute ethanol was added for washing. The washed solid is transferred to the above-mentioned beaker filled with sodium hydroxide-ethanol solution, saponified for 30min under constant stirring, and then washed...

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Abstract

The invention discloses a chlorine dioxide sustained-release material and a preparation method thereof, the chlorine dioxide sustained-release material is composed of a reagent A and a reagent B, the reagent A takes polyvinyl alcohol-maleic anhydride water-absorbent resin as a substrate, the resin contains a chlorine dioxide stabilizing solution, the reagent B is a weakly acidic substance, and the reagent A and the reagent B are mixed during use; the weakly acidic substance is any one of citric acid, tartaric acid and malic acid. The chlorine dioxide sustained-release material has the beneficial effects that the green, non-toxic and recyclable cross-linking agent maleic anhydride and the solvent butyl acetate are used in the prepared chlorine dioxide slow-release material, reagents used in the preparation process flow are convenient to recycle, and environmental pollution is avoided; and the water-absorbent resin prepared by the invention can be stably stored in a weak acid environment, has little influence on the liquid absorption performance, can be used for absorbing a slow-release liquid, and can slowly release and generate chlorine dioxide by adding a proper amount of activating liquid.

Description

technical field [0001] The invention relates to a chlorine dioxide slow-release material and a preparation method thereof, in particular to a chlorine dioxide slow-release polyvinyl alcohol water-absorbing resin material and a preparation method thereof. Background technique [0002] Polyvinyl alcohol is a high molecular polymer with certain water solubility. Its chemical structural formula is relatively simple, and only hydroxyl groups are side groups on the main chain. It is generally white solid particles or powder at room temperature. The simple chemical structure of polyvinyl alcohol enables it to undergo cross-linking reactions with various cross-linking agents such as aldehyde cross-linking agents and acid anhydride cross-linking agents to form a water-insoluble cross-linked network structure at room temperature. Moreover, polyvinyl alcohol has almost no biological toxicity, and has been widely used in fields such as biomedicine, agricultural irrigation, and food pres...

Claims

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Application Information

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IPC IPC(8): A01N59/00A01N25/10A01N25/18A01P1/00A01P3/00C08F261/04C08F222/06
CPCA01N59/00A01N25/10A01N25/18C08F261/04C08F222/06
Inventor 张娇霞陈正扬陈国安王磊刘建枰
Owner 长沙尚洁环保科技有限公司