Hydrophobic-material-coated environment-friendly coated slow release fertilizer and preparation method thereof

An environment-friendly, coated and slow-release technology, applied in the field of slow-release fertilizers, can solve the problems of water-retaining agent falling off easily, coating waterproofness needs to be improved, and slow-release performance is not good, so as to achieve remarkable water retention effect and enhance water resistance , easily biodegradable effect

Inactive Publication Date: 2017-04-26
严幸
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Ni Boli prepared a water-retaining slow-release fertilizer by using sodium alginate and polyacrylic acid in his postgraduate dissertation "Preparation and Performance Research of Environmentally Friendly Multifunctional

Method used

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Embodiment

[0019] An environmentally friendly coated slow-release fertilizer coated with a hydrophobic material is characterized in that it is made of the following raw materials by weight:

[0020] Carboxymethyl cellulose 15, acrylic acid 20, sodium alginate solution 30, hydroxyethyl cellulose 10, ammonium persulfate 2, N, N,-methylenebisacrylamide 6, citric acid 2, polyvinyl alcohol 25, Starch-5, urea 35, potassium hydrogen phosphate 15, distilled water 100;

[0021] The mass fraction of the sodium alginate solution is 5%-30%, and the mass fraction of the calcium chloride solution is 7%-15%.

[0022] The preparation method of an environmentally friendly coated slow-release fertilizer coated with a hydrophobic material is characterized in that it is made by the following steps:

[0023] a. Add acrylic acid, ammonium persulfate and N, N,-methylenebisacrylamide to distilled water to make a mixed solution, add dropwise to 10-20 parts of sodium alginate solution, and keep stirring; after n...

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Abstract

The invention discloses a hydrophobic-material-coated environment-friendly coated slow release fertilizer and a preparation method thereof. The hydrophobic-material-coated environment-friendly coated slow release fertilizer is prepared from the following raw materials in parts by weight: 8-15 parts of carboxymethylcellulose, 10-20 parts of acrylic acid, 20-30 parts of a sodium alginate solution, 5-10 parts of hydroxyethyl cellulose, 1-2 parts of ammonium persulfate, 3-6 parts of N,N-methylene bisacrylamide, 1-2 parts of citric acid, 15-25 parts of polyvinyl alcohol, 3-5 parts of starch, 25-35 parts of urea, 8-15 parts of potassium hydrogen phosphate and 50-100 parts of distilled water. A water-retaining agent is added into crosslinking liquid to obtain a mixture, and the mixture is sprayed to a core of the fertilizer, so that the defect that the water-retaining agent is easy to fall after being directly adhered to the core of the fertilizer is overcome, and the water-retaining effect of the fertilizer is remarkable; meanwhile, the crosslinking liquid has the effect of improving the water resistance of the fertilizer; and by utilizing a hydrophobic coated material as a coat of an inner layer of the fertilizer, a relatively good slow release effect is achieved.

Description

technical field [0001] The invention relates to a slow-release fertilizer, in particular to a method for preparing an environmentally friendly coated slow-release fertilizer coated with a hydrophobic material. [0002] technical background [0003] Coated slow / controlled release fertilizer is based on granular chemical fertilizer, and the surface is coated with a layer of slightly water-soluble inorganic or organic polymer, which can change the release characteristics of fertilizer nutrients, prolong or control the release of fertilizer nutrients, A new type of fertilizer that coordinates the release of nutrients with the fertilizer requirements of crops. The development of this kind of fertilizer has put forward new ideas for improving fertilizer utilization rate, reducing environmental pollution, and developing labor-saving and labor-saving modern agriculture. Therefore, researchers in fertilizer science, soil science, environmental science, chemistry and other disciplines...

Claims

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Application Information

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IPC IPC(8): C05G3/00
CPCC05B7/00C05G3/00C05G5/37C05C9/00C05G5/30
Inventor 严幸
Owner 严幸
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