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Saline-alkali tolerant functional water-retaining agent and preparation method thereof

A water-retaining agent and functional technology, which is applied in the field of functional polymer material synthesis, can solve the problems of low water-retaining agent, salt and alkali resistance, etc., and achieve the effects of improving physical and chemical structure, easy control of reaction, and reducing alkalinity

Inactive Publication Date: 2012-02-15
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of the existing water-retaining agents that are not strong in salt and alkali resistance, and to improve the soil structure required for plant growth in deserts, saline-alkali lands, and loess areas, and to provide organic matter required for plant growth, the purpose of the present invention is to provide a low-cost water-retaining agent. , the synthesis conditions are mild, easy to control, can effectively reduce the alkalinity of the soil, maintain the soil moisture content, effectively reduce the free sodium ions and heavy metal ions in the saline-alkali soil, and improve the physical and chemical structure of the soil. its preparation method

Method used

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  • Saline-alkali tolerant functional water-retaining agent and preparation method thereof
  • Saline-alkali tolerant functional water-retaining agent and preparation method thereof
  • Saline-alkali tolerant functional water-retaining agent and preparation method thereof

Examples

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Embodiment 1

[0025] (1) Its formula is: 6g sulfonated humic acid, 0.2g cross-linking agent N, N'-methylenebisacrylamide (MBA), 1.0g ammonium persulfate-ammonium bisulfite initiator, 100g acrylic acid.

[0026] The production method of sulfonated humic acid is as follows: in parts by weight, take 120 parts of humic acid and put it into a four-port reactor equipped with a thermometer, a dropping funnel, an electronic stirrer and a condensation reflux device, and add 0.01mol / L potassium hydroxide solution, stir to completely dissolve humic acid, add 100 parts of sodium sulfite solution dropwise at a rate of 5mL / min, stir, react at 100°C for 3h, cool to room temperature, and adjust the pH value with 0.1mol / L dilute hydrochloric acid 3, dried and ground to obtain sulfonated humic acid, the mass percent concentration of the sodium sulfite solution is 25%; the initiator is ammonium persulfate-ammonium bisulfite initiator system, ammonium persulfate and sulfurous acid The mol ratio of ammonium hyd...

Embodiment 2-8

[0033]The proportion of a salt-alkali-resistant functional water-retaining agent provided in Examples 2-8 and the reaction time of the preparation method are shown in Table 2, and the rest are the same as in Example 1. The absorption rate is shown in Table 2.

[0034] Table 2 The mass ratio, reaction time and liquid absorption ratio of a saline-alkali-resistant functional water-retaining agent

[0035]

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Abstract

The invention relates to a saline-alkali tolerant functional water-retaining agent and a preparation method thereof. The water-retaining agent is graft copolymer of sulfonated humic acid, N-N'-methylenebisacrylamide and crylic acid; the structural formula of the water-retaining agent is shown in the specifications; and the water-retaining agent has high saline-alkali tolerance, and can absorb tap water in an amount which is 123 times that of the water-retaining agent and absorb sodium carbonate saline, with the pH value of 9, in an amount which is 85 times that of the water-retaining agent. The water-retaining agent can effectively adsorb free sodium ions and heavy metal ions and can effectively reduce alkalinity of soil so as to improve the physical and chemical structure of the soil. The water-retaining agent is prepared by a normal temperature polymerization method, and has a simple process and mild reaction conditions. The crylic acid and the humic acid serve as main raw materials; potassium, nitrogen and organic matters required by plant growth can be supplemented; and the sulfonated humic acid is released slowly, so that growth of plants is promoted.

Description

technical field [0001] The invention relates to a saline-alkali-resistant functional water-retaining agent and a preparation method thereof, belonging to the field of synthesis of functional polymer materials. Background technique [0002] China is one of the countries with the most severe soil erosion in the world. The national soil erosion area is 3.56 million square kilometers, accounting for 37.1% of the country's land area. Controlling soil erosion and combating desertification has become an important part of my country's sustainable development. Among the many ways to implement soil and water conservation, the application of superabsorbent resins to control soil erosion, drought and desertification is a new direction of current research. [0003] Humic acid has good chemical activity and biological activity. After humic acid is sulfonated and modified, it can be used as a raw material for synthetic water-retaining agent to prepare water-absorbing resin containing humi...

Claims

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Application Information

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IPC IPC(8): C09K17/32C08G81/02C08F220/06C08F4/40
Inventor 张龙秦磊王超
Owner CHANGCHUN UNIV OF TECH
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