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A kind of ecological moisturizing water storage composite material and preparation method thereof

A composite material and ecological technology, applied in the field of environmental engineering, can solve the problems of hindering the application of water-retaining agents, poor soil compatibility, and low water absorption rate, and achieve the effects of improving polymerization reaction efficiency, high water absorption rate, and low production cost.

Active Publication Date: 2017-01-25
ELION RESOURCE GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the water storage and moisturizing materials on the market are organic acrylics, polyamides and polyvinyl alcohols, etc., which are prepared by solution polymerization or reverse-phase suspension polymerization, with high cost, low water absorption rate, and poor compatibility with soil. This is the key issue that hinders the large-scale application of water-retaining agents in various fields. Therefore, the development of low-cost, salt-alkali-resistant and high-water-absorbing water-retaining agents for agriculture and forestry has great potential for the application of water-retaining agents in arid agriculture and restoration of the ecological environment. Significance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The raw materials and mass parts of the ecological moisturizing and water storage composite material of the present embodiment are as follows:

[0020] 100 parts of acrylic acid;

[0021] 41 parts of sodium hydroxide;

[0022] 40 parts of bentonite;

[0023] 0.5 parts of N,N-methylenebisacrylamide;

[0024] Potassium persulfate 0.8 parts.

[0025] The preparation steps of the ecological moisturizing and water storage composite material:

[0026] (1) Take sodium hydroxide to prepare an aqueous solution with a concentration of 25% by mass, add it to acrylic acid, and stir for a neutralization reaction. The reaction time is 20 minutes, and the temperature of the reaction solution is kept below 25°C. The pH at the end of the reaction is 7. The degree of neutralization is controlled at 75%.

[0027] (2) Grind bentonite until the particles can pass through a 200-mesh sieve, add deionized water and stir evenly, then perform ultrasonic treatment for 20 minutes, add the pre...

Embodiment 2

[0032] The raw materials and mass parts of the ecological moisturizing and water storage composite material of the present embodiment are as follows:

[0033] 120 parts of acrylic acid;

[0034] 49 parts of sodium hydroxide;

[0035] 50 parts of bentonite;

[0036] 0.8 parts of N,N-methylenebisacrylamide;

[0037] Potassium persulfate 1 part.

[0038] The preparation method of the ecological moisturizing and water storage composite material of the present embodiment, the specific steps are as follows:

[0039] (1) Take sodium hydroxide to prepare an aqueous solution with a concentration of 25% by mass, slowly add it to acrylic acid, and stir to cause a neutralization reaction. The pH value at the end of the reaction is 6~7, and the neutralization degree is controlled at 75%~ 80%, the reaction time is 30 minutes, and the temperature of the reaction solution is kept below 25°C.

[0040] (2) Grind bentonite until the particles can pass through a 200-mesh sieve, add deionized...

Embodiment 3

[0045] The raw materials and mass parts of the ecological moisturizing and water storage composite material of the present embodiment are as follows:

[0046] 150 parts of acrylic acid;

[0047] 62 parts of sodium hydroxide;

[0048] 70 parts of bentonite;

[0049] 0.9 parts of N,N-methylenebisacrylamide;

[0050] Potassium persulfate 1.2 parts.

[0051] The preparation method of the ecological moisturizing and water storage composite material of the present embodiment, the specific steps are as follows:

[0052] (1) Slowly add the prepared sodium hydroxide solution with a mass percentage concentration of 25% into the acrylic acid, and stir to cause a neutralization reaction. The pH value at the end of the reaction is 7, and the neutralization degree is controlled at 75%~80%. , the reaction time is 30 minutes, and the temperature of the reaction solution is kept below 25°C.

[0053] (2) Add the pretreated bentonite (the pretreatment method is the same as in Example 1) int...

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PUM

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Abstract

The invention discloses an ecological moisture-retention water-storage composite material and a preparation method thereof, and belongs to the technical field of environmental engineering. The ecological moisture-retention water-storage composite material comprises, by mass, 100 to 200 parts of acrylic acid, 40 to 83 parts of sodium hydroxide, 40 to 80 parts of bentonite, 0.4 to 3 parts of N,N-methylenebisacrylamide, and 0.6 to 4 parts of potassium persulphate. The preparation method comprises following steps: sodium hydroxide is prepared into an aqueous solution, and the aqueous solution is added into acrylic acid slowly for neutralization reaction; bentonite is added into an obtained mixed material, after stirring and reaction, N,N-methylenebisacrylamide is added, an obtained mixture is stirred and reacted continuously; potassium persulphate is added for stirring and reaction, wherein reaction is carried out at 70 to 75 DEG C in a sealed environment under nitrogen atmosphere protection; and an obtained product is subjected to washing, drying, and smashing so as to obtain a finished product. Water absorption capability of the ecological moisture-retention water-storage composite material is excellent; the preparation method is low in production cost; and it is beneficial for wide popularization and application.

Description

technical field [0001] The invention relates to the technical field of environmental engineering, in particular to an ecological moisturizing and water storage composite material and a preparation method thereof. Background technique [0002] The increasingly serious environmental pollution and the year-by-year reduction of green vegetation pose a severe test to the human living environment, especially in areas such as agricultural production, land desertification, and urban greening. The water in the soil is easy to lose, causing soil agglomeration, soil desertification, etc. question. At present, most of the water storage and moisturizing materials on the market are organic acrylics, polyamides and polyvinyl alcohols, etc., which are prepared by solution polymerization or reverse-phase suspension polymerization, with high cost, low water absorption rate, and poor compatibility with soil. This is a key issue that hinders the large-scale application of water-retaining agent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/06C08F222/38C08F2/44C08F4/30C08K9/00C08K3/34C08L33/02
Inventor 郭娟丽刘珊刘建辉周玉生周明吉陈步宁
Owner ELION RESOURCE GROUP