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Photodegradable nanometer polymer coated fertilizer and preparation method thereof

A fertilizer and coating technology, applied in the direction of fertilizer mixture, fertilization device, application, etc., to achieve high degradation efficiency, realize cyclic development, and reduce accumulation

Active Publication Date: 2015-10-14
BEIJING ACADEMY OF AGRICULTURE & FORESTRY SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of residual coating accumulation in the prior art, and to provide a photodegradable nano-polymer coated fertilizer and its preparation method by using the photocatalytic principle of ultra-fine nano-scale powder

Method used

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  • Photodegradable nanometer polymer coated fertilizer and preparation method thereof
  • Photodegradable nanometer polymer coated fertilizer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Embodiment 1, preparation of photodegradable nanometer polymer coated fertilizer

[0024] Weigh 45g of low-density polyethylene (purchased from Beijing Yanshan Petrochemical Co., Ltd., the model is 1F7B, the viscosity average molecular weight is 40700), 8.5g of filler material talcum powder and 0.6g of nano photocatalyst with a particle size of 50nm are coated with a layer of hydrophobic layer of nano-titanium dioxide (that is, hydrophobic nano-titanium dioxide, purchased from Beijing Deke Daojin Technology Co., Ltd.), mixed in 1L of tetrachlorethylene at 100-110°C to obtain a coating solution; 1kg of urea particles were placed in the jet stream In the tower, the temperature of the dry hot air is controlled at 100-110°C. Under the support of the hot air, the coating liquid is sprayed onto the surface of the suspended and fluidized urea particles through the nozzle, and the coating with a coating rate of 5% is obtained after the solvent evaporates. Fertilizer, recorded a...

Embodiment 2

[0025] Embodiment 2: Preparation of Photodegradable Nanopolymer Coated Fertilizer

[0026] Weigh 45g of low-density polyethylene (purchased from Beijing Yanshan Petrochemical Co., Ltd., the model is 1F7B, the viscosity average molecular weight is 40700), 4g of starch, 4.5g of calcium carbonate and 0.6g of nano photocatalyst with a particle size of 20nm coated with a layer of Hydrophobic layer of nano-titanium dioxide (that is, hydrophobic nano-titanium dioxide, purchased from Beijing Deke Daojin Technology Co., Ltd.), mixed in 1L tetrachlorethylene at 100-110 ° C to obtain a coating solution; 1kg urea particles were placed in the spray In the flow tower, the temperature of the dry hot air is controlled at 100-110°C. Under the support of the hot air, the coating liquid is sprayed onto the surface of the suspended and fluidized urea particles through the nozzle. After the solvent is volatilized, the coating with a coating rate of 5% Membrane fertilizer, denoted as sample 2.

Embodiment 3

[0027] Embodiment 3: Preparation of Photodegradable Nanopolymer Coated Fertilizer

[0028] Weigh 45g of polystyrene (purchased from Sinopec Yangzi BASF, the model is EPS403W, the viscosity average molecular weight is 53870), 8.5g of talc powder and 1.1g of nano-titanium dioxide with a particle size of 30nm and a hydrophilic layer on the surface (that is, hydrophilic Water-based nano-titanium dioxide (purchased from Degussa, model P25) was mixed in 1L of tetrachlorethylene at 100-110°C to obtain the coating solution; 1kg of urea particles were placed in the spray tower, and the temperature of the drying hot air was controlled At 100-110°C, the coating liquid is sprayed onto the surface of the suspended and fluidized urea particles through the nozzle under the support of hot air, and the coated fertilizer with a coating rate of 5% is obtained after the solvent is volatilized, which is recorded as sample 3.

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Abstract

The invention discloses a light degradable nano-polymer coated fertilizer and a preparation method thereof. The coated fertilizer is composed of a fertilizer particle and a coating layer wrapping the fertilizer particle. Specifically, the coating layer comprises a nano-photocatalyst and polyolefin resin. The fertilizer particle is a water soluble single fertilizer or a compound fertilizer formed by mixing of at least two water soluble single fertilizers. The nano-photocatalyst and polyolefin resin are in a mass ratio of 0.1-6:100. The nano-photocatalyst is at least one of hydrophilic nano-titanium dioxide and hydrophobic nano-titanium dioxide. Along with agricultural ploughing and other field operation, the residual film of the coated fertilizer provided by the invention can undergo effective light degradation under light illumination or along with the passage of time, thus realizing cyclic development of the agricultural production system.

Description

technical field [0001] The invention relates to a photodegradable nano-polymer coated fertilizer and a preparation method thereof, belonging to the technical field of coated fertilizers. Background technique [0002] Coated controlled-release fertilizers have become a research and development hotspot in the field of slow-release fertilizers. Among them, polyolefin resin-coated fertilizers have become mainstream controlled-release fertilizer products in the market due to their excellent controlled-release performance, and have been vigorously promoted by government departments. . However, there are still some problems in the current application that need to be solved urgently, such as the degradation of the residual coating, otherwise it will cause the so-called "white pollution" and other problems. [0003] The emergence of degradable plastics has opened up a way to solve the problem of environmental pollution of such residual films. The existing coated fertilizers prepare...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/00
Inventor 李丽霞曹兵李鸿雁倪小会刘宝存杨俊刚肖强衣文平徐秋明杨宜斌
Owner BEIJING ACADEMY OF AGRICULTURE & FORESTRY SCIENCES
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