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Preparation method of agricultural composite water retention agent

A technology of water-retaining agent and crop straw, applied in chemical instruments and methods, applications, agriculture, etc., can solve problems such as complex processes, achieve high gel strength, excellent water regulation function, and increase water retention capacity

Active Publication Date: 2015-03-04
甘肃圣大方舟马铃薯变性淀粉有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the process is complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The preparation method of water-retaining agent, concrete steps are as follows:

[0020] 1. After dedusting the crop straws, use a pulverizer to crush them, and pass through a 40-mesh sieve to obtain coarse powder;

[0021] 2. Slowly add 60g of acrylic acid to 117ml of 30% potassium hydroxide solution in an ice-water bath for neutralization, and stir at room temperature for 30 minutes to prepare an acrylate solution with a neutralization degree of 75%;

[0022] 3. Mix 66g of wheat flour and 34g of pretreated straw powder, add 750ml of water to make slurry, heat up to 80°C, gelatinize for 30min, cool down to 60°C, slowly add acrylate with a neutralization degree of 70% Solution, after mixing evenly, add initiator-ammonium persulfate 3g, after stirring for 5min, add cross-linking agent-N,N-methylenebisacrylamide 5g, polymerize for 15min, form a mesh structure, immerse in 300ml 0.9% Soak in salt water for 30 minutes to get water retaining agent;

[0023] 4. Wash the wate...

Embodiment 2

[0025] The preparation method of water-retaining agent, concrete steps are as follows:

[0026] 1. After dedusting the crop straws, use a pulverizer to crush them, and pass through a 40-mesh sieve to obtain coarse powder;

[0027] 2. Slowly add 72g of acrylic acid to 130ml of 30% potassium hydroxide solution in an ice-water bath for neutralization, and stir at room temperature for 30 minutes to prepare an acrylate solution with a neutralization degree of 70%;

[0028] 3. Mix 66g of corn flour and 34g of pretreated straw powder, add 750ml of water to make slurry, heat up to 90°C, gelatinize for 45min, cool down to 65°C, slowly add acrylate with a neutralization degree of 70% Solution, after mixing evenly, add initiator-ammonium persulfate 5g, stir for 5min, add cross-linking agent-N,N-methylenebisacrylamide 8g, polymerize for 20min, form a mesh structure, immerse in 300ml 0.9% Soak in salt water for 30min to get water retaining agent;

[0029] 4. Wash the water-retaining agen...

Embodiment 3

[0031] The preparation method of water-retaining agent, concrete steps are as follows:

[0032] 1. After dedusting the crop straws, use a pulverizer to crush them, and pass through a 40-mesh sieve to obtain coarse powder;

[0033] 2. Slowly add 100g of acrylic acid to 168ml of 30% potassium hydroxide solution in an ice-water bath for neutralization, and stir at room temperature for 30 minutes to prepare an acrylate solution with a neutralization degree of 65%;

[0034] 3. Mix 63g of wheat flour, 33g of corn flour and 34g of pretreated straw powder, add 750ml of water to make slurry, heat up to 95°C, gelatinize for 60min, cool down to 70°C, slowly add neutralization degree to 65 % acrylate solution, mix well and add initiator-potassium persulfate 8g, after stirring for 10min, add cross-linking agent-N,N-methylenebisacrylamide 14g, after polymerization reaction for 30min, a mesh structure is formed, Immerse in 30ml of 0.9% salt water for 30 minutes to obtain a water-retaining a...

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Abstract

The invention discloses a preparation method of an agricultural composite water retention agent, which comprises the following steps: (1) performing dust removal on straws of crops, pulverizing, and sieving with a 40-mesh sieve; (2) adding a 30% potassium hydroxide solution into acrylic acid, and neutralizing to prepare a neutralized acrylate solution; (3) proportionally mixing flour and the pretreated straw powder, adding water, pulping, heating, gelatinizing, then cooling, slowly adding the neutralized acrylate solution according to the mass ratio of the flour and straw mixed powder to the acrylic acid before neutralization, mixing, then adding initiator, stirring, then adding a crosslinking agent, performing polymerization reaction to form a mesh-shaped structure, and soaking in salt water to obtain water retention agent pulp; and (4) washing the water retention agent pulp with ethanol, then cutting, drying, and pulverizing to prepare the water retention agent. The product disclosed by the invention has the characteristics of high water absorptivity, high gel strength, biodegradability, low cost and environment friendliness, and is suitable for application in the culture of edible fungi.

Description

technical field [0001] The invention relates to the technical field of agricultural water-retaining agents, in particular to a preparation method of a degradable agricultural composite water-retaining agent suitable for edible fungus cultivation. Background technique [0002] Water-retaining agent is a high-molecular polymer made of strong water-absorbing resin, which has the functions of water absorption, water retention and water release. It can quickly absorb deionized water hundreds or even thousands of times heavier than itself, and swell into a hydrogel after absorbing water, which can slowly release water for crops to absorb and utilize, thereby enhancing soil water retention, improving soil structure, and reducing deep seepage And soil nutrient loss, improve water use efficiency. [0003] In the prior art, the preparation of water-retaining agents can be divided into: synthetic water-retaining agent series, using polyacrylate, polyvinyl alcohol, polyoxyethylene, etc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F251/00C08F251/02C08F220/06C09K17/32C09K101/00
Inventor 田映良刘玲余巧健崔芸
Owner 甘肃圣大方舟马铃薯变性淀粉有限公司
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