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Preparation method of carboxymethyl cellulose sustained-release fertilizer film coating material

A technology of carboxymethyl cellulose and coating material, applied in the field of materials, can solve the problems of hard and brittle, poor moisture resistance, etc., and achieve the effects of improving hydrophobicity, improving water resistance, and reducing water absorption

Inactive Publication Date: 2018-10-19
FOSHAN WANYANG BIOLOGICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention: Aiming at the shortcomings of carboxymethyl cellulose film being relatively hard and fragile, carboxymethyl cellulose film has strong hydrophilicity and poor moisture resistance, a carboxymethyl fiber film is provided Preparation method of plain slow-release fertilizer coating material

Method used

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  • Preparation method of carboxymethyl cellulose sustained-release fertilizer film coating material

Examples

Experimental program
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Effect test

example 1

[0021] Prepare a carboxymethyl cellulose solution with a mass fraction of 2%, add ammonium chloride at a mass ratio of 1:3, stir magnetically until the ammonium chloride is completely dissolved, and obtain a base liquid, add a borax crosslinking agent at a mass ratio of 0.2:1 , and continue to stir for 30min to obtain modified cellulose; in parts by weight, respectively get 10 parts of polyvinyl alcohol, 20 parts of modified cellulose, and 40 parts of deionized water, respectively mix polyvinyl alcohol and modified cellulose at a temperature of Dry in a 60°C drying oven to constant mass, transfer to a mixer for dry mixing for 1 hour, then add to deionized water stirred at high speed to obtain mixed solution A; mix montmorillonite and deionized water at a mass ratio of 1:20 , ultrasonically dispersed for 10 minutes to obtain a dispersion, slowly pour the mixed solution A into the dispersion according to the mass ratio of 5:2, and stir at a speed of 500 r / min and a temperature of...

example 2

[0023] Prepare a carboxymethyl cellulose solution with a mass fraction of 2%, add ammonium chloride at a mass ratio of 1:3, stir magnetically until the ammonium chloride is completely dissolved, and obtain a base liquid, add a borax crosslinking agent at a mass ratio of 0.2:1 , and continue to stir for 30min to obtain modified cellulose; in parts by weight, respectively get 13 parts of polyvinyl alcohol, 25 parts of modified cellulose, and 45 parts of deionized water, respectively mix polyvinyl alcohol and modified cellulose at a temperature of Dry in a 70°C drying oven to constant mass, transfer to a mixer for dry mixing for 1 hour, then add to deionized water stirred at high speed to obtain mixed solution A; mix montmorillonite and deionized water at a mass ratio of 1:20 , ultrasonically dispersed for 15 minutes to obtain a dispersion liquid, slowly pour the mixed solution A into the dispersion liquid according to the mass ratio of 5:2, and stir at a speed of 550r / min and a t...

example 3

[0025] Prepare a carboxymethyl cellulose solution with a mass fraction of 2%, add ammonium chloride at a mass ratio of 1:3, stir magnetically until the ammonium chloride is completely dissolved, and obtain a base liquid, add a borax crosslinking agent at a mass ratio of 0.2:1 , and continue to stir for 30min to obtain modified cellulose; in parts by weight, respectively get 16 parts of polyvinyl alcohol, 30 parts of modified cellulose, and 50 parts of deionized water, respectively mix polyvinyl alcohol and modified cellulose at a temperature of Dry in a drying oven at 80°C to constant mass, transfer to a mixer for dry mixing for 2 hours, then add to deionized water stirred at high speed to obtain mixed solution A; mix montmorillonite and deionized water at a mass ratio of 1:20 , ultrasonically dispersed for 20 minutes to obtain a dispersion liquid, slowly pour the mixed solution A into the dispersion liquid according to the mass ratio of 5:2, and stir for 2 hours at a speed of ...

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Abstract

The invention relates to a preparation method of a carboxymethyl cellulose sustained-release fertilizer film coating material, and belongs to the technical field of materials. The preparation method comprises the following steps of using carboxymethyl cellulose as the raw material, using borax as a crosslinking agent, using ammonium chloride as an acidity regulator of a reaction system, and usingglycerol as a plasticizer, so as to prepare the carboxymethyl cellulose slow-release fertilizer film coating material; the hydroxyl groups on molecular chains of the carboxymethyl cellulose are crosslinked by the borax, so that while one part of hydroxyl groups is consumed, a network of the molecular chains is denser, and the hydrophobicity is improved. The preparation method has the advantages that the modified carboxymethyl cellulose is inserted between montmorillonite flakes, the -COO- and -O- bonds of sodium carboxymethyl cellulose generate coordination or complexing function with -OH andSi-O bonds in the montmorillonite molecules through the cations between the montmorillonite flakes, and the laminar surface groups of the montmorillonite can be bonded with the hydroxyl groups on themolecular chains of the carboxymethyl cellulose, weaken or damage the chance that the active hydroxyl groups in carboxymethyl cellulose molecule contacts with water, so that the water absorbing rate of the thin film is reduced, and the water-resistant property is improved.

Description

technical field [0001] The invention relates to a preparation method of a carboxymethyl cellulose slow-release fertilizer coating material, which belongs to the field of material technology. Background technique [0002] As a large agricultural and populous country, our country needs to use limited arable land to support the huge population's demand for food. As the population continues to increase, the area of ​​arable land cannot increase. Therefore, in order to feed the increasing population with limited arable land and achieve sustainable and efficient development, the innovation and development of fertilizer technology has important strategic significance for the development of agricultural industrialization. In the use of fertilizer, the fertilizer will directly enter the soil after fertilization, providing a large amount of nutrients at one time, while the utilization of the nutrients of the plant itself is a continuous process, and the excess fertilizer will be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C08J5/18C08J3/24C08B15/10C08L1/28C08L29/04C08K7/00
CPCC08B15/10C08J3/246C08J5/18C08J2301/28C08J2429/04C08K7/00C05G5/30C05G5/37
Inventor 刘茂龙张鑫李静
Owner FOSHAN WANYANG BIOLOGICAL TECH CO LTD