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Preparation method of soil water-retaining agent

A technology of soil water-retaining agent and deionized water, which is applied in the field of soil treatment, can solve the problems of poor stability of soil water-retaining agent and short water retention time, and achieve the effect of improving water absorption and water retention capacity, improving stability, and strengthening transmission

Inactive Publication Date: 2018-10-12
钱兴
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Technical problem to be solved by the present invention: Aiming at the problems of poor stability and short water retention time of current soil water retaining agents, a preparation method of soil water retaining agents is provided

Method used

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  • Preparation method of soil water-retaining agent

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preparation example Construction

[0013] A preparation method of soil water retaining agent, comprising the steps of:

[0014] (1) Take polysuccinimide and add N,N'-dimethylformamide at a mass ratio of 1:4~6, stir and mix at 75~80°C for 20~30min, then add 20~ 25% hydrazine hydrate, stirred and mixed at 35-40°C for 3-4 hours, filtered with suction, and dried the filter residue to obtain a dried product;

[0015] (2) Take the dry matter and add deionized water according to the mass ratio of 1:7~10, adjust the pH to 9~10, then add ethylene glycol diglycidyl ether with 3~5% deionized water quality, at 45~50℃ Stir and mix for 2~3h, the mixture must be stirred and set aside;

[0016] (3) In terms of parts by mass, take 15-20 parts of methacrylic acid, 10-15 parts of dimethyl vinyl phosphate, 2-4 parts of 2,2'-azobisisobutyronitrile, and 50-70 parts of acetonitrile , ultrasonically dispersed for 20-30 minutes to obtain a mixture, take the mixture and add ethylene glycol dimethacrylate at a mass ratio of 80-90:1-3, ...

Embodiment 1

[0019] A preparation method of soil water retaining agent, comprising the steps of:

[0020] (1) Take polysuccinimide and add N,N'-dimethylformamide at a mass ratio of 1:4, stir and mix at 75°C for 20 minutes, then add hydrazine hydrate with 20% of the mass of dimethylformamide, at 35 Stir and mix for 3 hours at ℃, filter with suction, take the filter residue and dry it to obtain a dried product;

[0021] (2) Take the dry matter and add deionized water at a mass ratio of 1:7 to adjust the pH to 9, then add ethylene glycol diglycidyl ether with 3% deionized water quality, and stir and mix at 45°C for 2 hours to obtain a stirred mixture. spare;

[0022] (3) In parts by mass, take 15 parts of methacrylic acid, 10 parts of dimethyl vinyl phosphate, 2 parts of 2,2'-azobisisobutyronitrile, and 50 parts of acetonitrile, and ultrasonically disperse for 20 minutes to obtain a mixture. Take the mixture and add ethylene glycol dimethacrylate at a mass ratio of 80:1, heat up to 95°C and...

Embodiment 2

[0025] A preparation method of soil water retaining agent, comprising the steps of:

[0026] (1) Take polysuccinimide and add N,N'-dimethylformamide at a mass ratio of 1:5, stir and mix at 78°C for 25 minutes, then add hydrazine hydrate with 23% of the mass of dimethylformamide, at 38 Stir and mix for 3.5 hours at °C, filter with suction, and dry the filter residue to obtain a dried product;

[0027] (2) Take the dry matter and add deionized water at a mass ratio of 1:9 to adjust the pH to 9.5, then add ethylene glycol diglycidyl ether with 4% deionized water quality, and stir and mix at 48°C for 2.5 hours to obtain a stirred mixture ,spare;

[0028] (3) In terms of parts by mass, take 18 parts of methacrylic acid, 13 parts of dimethyl vinyl phosphate, 3 parts of 2,2'-azobisisobutyronitrile, and 60 parts of acetonitrile, and ultrasonically disperse for 25 minutes to obtain a mixture. Take the mixture and add ethylene glycol dimethacrylate at a mass ratio of 85:2, heat up to ...

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Abstract

The invention discloses a preparation method of a soil water-retaining agent, and belongs to the technical field of soil treatment. The method comprises the steps that polymerization reaction is carried out on polysuccinimide and hydrazine hydrate, then methacrylic acid and vinyl dimethyl phosphate serve as raw materials, a cross-linking agent and an initiator are added, and phosphoric acid microspheres are prepared through a precipitation co-distillation method; phosphate radicals are introduced on the microspheres, wherein the amphoteric carrier phosphate radicals can be quickly dissociatedunder low humidity or even an anhydrous condition to promote transmission of protons in a membrane at low humidity; polyether-ether-ketone is added for sulfonation and filled with the phosphoric acidmicrospheres, a composite membrane is formed to wrap water-retaining active substances, a micro-capsule structure is formed. The water-absorbing and water-retaining capacity of the membrane is improved, and transmission of the protons is reinforced through a transmission mechanism; mutual adjustment is achieved under the state of sufficient soil moisture and moisture lack, and the balance of soilmoisture is guaranteed. The soil water-retaining agent solves the problems that an existing soil water-retaining agent is poor in stability and short in water-retaining time.

Description

technical field [0001] The invention relates to the technical field of soil treatment, in particular to a preparation method of a soil water-retaining agent. Background technique [0002] The total area of ​​arid and semi-arid regions in my country is 4.55 million hm 2 , accounting for 47% of the total land area, as my country's strategic focus gradually shifts to the west, water resources have increasingly become one of the important constraints on the development of the national economy. my country's agricultural water consumption accounts for 73.4% of the total water consumption, and the annual agricultural water shortage is about 30 billion m 3 , due to water scarcity and low water production efficiency, the agricultural water crisis is intensifying. The development of water-saving irrigation and dryland agricultural water-saving and water-conservation technologies centered on making full use of natural precipitation has become an inevitable choice for sustainable agri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/16C09K17/20C08F220/06C08F230/02C08F222/14C09K101/00
CPCC08F220/06C09K17/16C09K17/20C09K2101/00C08F230/02C08F222/102
Inventor 钱兴庄文琴李莉
Owner 钱兴
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