Biodegradable composite coating material for slow-release fertilizer and preparation method of coating material

A technology of slow-release fertilizers and coating materials, applied in fertilizer mixtures, layered/coated fertilizers, applications, etc., can solve problems such as human air, soil and food pollution, waste of resources, economic losses, and fertilizer loss, and achieve improved Effects of photosynthesis and enzyme activity, reduction of osmotic capacity, and promotion of chlorophyll formation

Inactive Publication Date: 2017-10-10
安徽奥利休闲农业发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In recent years, due to the loss and inefficient use of fertilizers, serious resource waste and huge economic losses have been caused, and more importantly, serious pollution has been caused to the human body, the atmosphere, soil and food

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] The biodegradable composite coating material for the slow-release fertilizer of the present embodiment is prepared by the following steps:

[0019] (1) Add hydroxylamine hydrochloride to isopropanol, mix and stir evenly to obtain hydroxylamine hydrochloride-isopropanol solution; add sodium hydroxide to isopropanol, mix and stir evenly to obtain sodium hydroxide-isopropanol solution ; Under stirring conditions, the sodium hydroxide-isopropanol solution is added dropwise to the hydroxylamine hydrochloride-isopropanol solution until the pH of the system is neutral to obtain a mixed solution for subsequent use;

[0020] (2) Add sodium alginate and sodium hydroxide to isopropanol, add ethyl chloroacetate, stir at room temperature for 1.5h, then raise the temperature to 80°C, stir with constant temperature magnetic force for 6h, lower the temperature to 35°C, and add step by drop (1) The resulting mixture was magnetically stirred at room temperature for 5 hours, filtered, and...

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Abstract

The invention discloses a biodegradable composite coating material for a slow-release fertilizer. The biodegradable composite coating material is characterized in that firstly, neutral sodium hydroxide-hydroxylamine hydrochloride-isopropyl alcohol mixed liquid is prepared; secondly, active hydroxyl in sodium alga acid and ethyl chloroacetate react, and the sodium alga acid is modified; thirdly, the modified sodium alga acid, cellulose and octenyl succinic anhydride react; finally, the reactant and acrylic emulsion are compounded, and bentonite is filled to prepare the biodegradable composite coating material for the slow-release fertilizer. According to the composite coating material, the sodium alga acid, the cellulose and the acrylic emulsion serving as a main body of the material are nontoxic, the biodegradable material is low in cost and simple in preparation method, industrial production of the materials is easily achieved, and production and application of the material are environmentally friendly.

Description

technical field [0001] The invention belongs to the field of fertilizers, and in particular relates to a biodegradable composite coating material for slow-release fertilizers and a preparation method thereof. Background technique [0002] In recent years, due to the loss and inefficient use of fertilizers, serious resource waste and huge economic losses have been caused, and more importantly, serious pollution has been caused to the human body, the atmosphere, soil and food. Therefore, how to improve the utilization rate of fertilizers and organically combine the application of fertilizers with the yield, quality and environmental protection of crops has become the focus of special attention in the field of fertilizer research. [0003] Since the 1950s, developed countries such as Europe, America and Japan have shifted from rational distribution of fertilizer nutrients and scientific fertilization technology to the development of long-acting slow-release fertilizers, and str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
CPCC05G5/37
Inventor 孔祥玉
Owner 安徽奥利休闲农业发展有限公司
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