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A kind of composite environment-friendly water-retaining agent and preparation method thereof

A water-retaining agent, an environmentally friendly technology, applied in chemical instruments and methods, fertilizer mixtures, agricultural machinery and implements, etc., can solve the problems of poor salt-alkaline resistance, soil salinization, low water absorption rate, etc., and achieve saline-alkaline resistance High, relieve soil compaction, strong water absorption rate effect

Active Publication Date: 2022-07-01
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the poor salt and alkali resistance of the existing acrylic superabsorbent resin, the low water absorption rate in actual use, and the problems of soil salinization and hardening, the purpose of the present invention is to provide a composite environment-friendly water-retaining agent with strong Water absorption and salt water absorption performance, can effectively relieve soil compaction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A composite environment-friendly water-retaining agent is prepared from the following components: 4 g of acrylic acid, 4.7 g of acrylamide, 0.7 g of potassium persulfate, 0.3 g of N-N' methylenebisacrylamide, 4 g of potassium lignosulfonate, Ionized water 100g.

[0021] The preparation method of the above-mentioned composite environment-friendly water-retaining agent includes the following steps: placing acrylic acid in an ice-water bath with a temperature of 0° C., slowly adding potassium hydroxide solution dropwise to the acrylic acid until the pH value is 7, adding acrylamide to dissolve completely , potassium persulfate, N-N' methylenebisacrylamide and potassium lignosulfonate are dissolved in water and slowly added to the above-mentioned acrylic acid solution dissolving acrylamide, the water bath is heated to 70 ℃ to keep the reaction for 4h, and then dried, Pulverized to obtain a composite environment-friendly water-retaining agent.

Embodiment 2

[0023] A composite environment-friendly water-retaining agent is prepared from the following components: acrylic acid 4.7g, acrylamide 15.3g, potassium persulfate 0.75g, N-N' methylenebisacrylamide 0.3g, potassium lignosulfonate 4.7g , 100g of deionized water.

[0024] The preparation method of the above-mentioned composite environment-friendly water-retaining agent includes the following process: placing acrylic acid in an ice-water bath with a temperature of 2° C., slowly adding potassium hydroxide solution dropwise to the acrylic acid until the pH value is 7.2, adding acrylamide to dissolve completely , potassium persulfate, N-N' methylenebisacrylamide and potassium lignosulfonate are dissolved in water and slowly added to the above-mentioned acrylic acid solution for dissolving acrylamide, the water bath is heated to 75 ℃ to keep the reaction for 3h, and then dried, Pulverized to obtain a composite environment-friendly water-retaining agent.

Embodiment 3

[0026] A composite environment-friendly water-retaining agent is made from the following components: 5g of acrylic acid, 18g of acrylamide, 0.75g of potassium persulfate, 0.5g of N-N' methylenebisacrylamide, 5g of potassium lignosulfonate, deionized Water 100g.

[0027] The preparation method of the above-mentioned composite environment-friendly water-retaining agent includes the following steps: placing acrylic acid in an ice-water bath with a temperature of 1° C., slowly adding potassium hydroxide solution dropwise to the acrylic acid until the pH value is 6.8, adding acrylamide until it is completely dissolved , potassium persulfate, N-N' methylenebisacrylamide and potassium lignosulfonate are dissolved in water and slowly added to the above-mentioned acrylic acid solution for dissolving acrylamide, the water bath is heated to 72 ° C to keep the reaction for 4 hours, and then dried, Pulverized to obtain a composite environment-friendly water-retaining agent.

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Abstract

The invention relates to the technical field of water-retaining agents for agriculture and forestry. In view of the problems that the existing acrylic superabsorbent resin has poor saline-alkali resistance, low water absorption rate in actual use, and easily causes soil salinization and hardening, a composite environment-friendly type is disclosed. A water-retaining agent, comprising the following components by weight: 3-6 parts of acrylic acid, 10-20 parts of acrylamide, 0.25-1.75 parts of potassium persulfate, 0.05-0.5 parts of N-N' methylenebisacrylamide, wood 3 to 6 parts of potassium sulfonate and 90 to 110 parts of deionized water. Among them, potassium lignosulfonate is preferably hydroxylated. The environment-friendly composite water-retaining agent of the invention has strong water absorption rate and salt water absorption rate, high salinity resistance and high degradability, and can effectively achieve soil water retention, fertilizer improvement, and ease soil compaction.

Description

technical field [0001] The invention relates to the technical field of water-retaining agents for agriculture and forestry, in particular to a composite environment-friendly water-retaining agent and a preparation method thereof. Background technique [0002] For a long time, due to the massive deforestation of vegetation, there have been serious problems of soil erosion and frequent occurrence of drought and flood disasters in my country. According to statistics, my country's desert land area reaches 2.722 million square kilometers, accounting for 29.3% of the total land area. Therefore, tree planting and natural tree protection projects such as afforestation and afforestation protection have received key support. However, due to the poor ecological environment in northern Northwest China and northern North China There are different degrees of water shortage in the desert areas of China, which affects the efficiency of afforestation. As a class of functional polymer materia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/40C09K101/00
CPCC09K17/40C09K2101/00
Inventor 费俊豪张鑫王旭陈思马猛施燕琴何荟文刘文静周立康吴宇晖
Owner ZHEJIANG UNIV OF TECH