Biodegradable fertilizer efficiency agricultural film as well as preparation method and application thereof

A technology for biodegradation and biodegradation of polyester is applied in the field of fertilizer-efficiency agricultural film and its preparation, which can solve the problems of high cost of biodegradable film materials, and achieve the effects of being beneficial to product promotion, low production cost, and improving the problem of difficult dispersion.

Pending Publication Date: 2022-03-11
武汉俱源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with traditional plastic of the same thickness, the material cost of biodegradable mulch is about 2 times more expensive

Method used

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  • Biodegradable fertilizer efficiency agricultural film as well as preparation method and application thereof
  • Biodegradable fertilizer efficiency agricultural film as well as preparation method and application thereof
  • Biodegradable fertilizer efficiency agricultural film as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Step S1, adding biodegradable polyester and surface-modified phosphate rock powder into a high-speed mixer, stirring and mixing to obtain a mixture, and the surface-modified phosphate rock powder is prepared by the following process:

[0039] Step S11, grinding the phosphate rock into powder with a particle size to obtain phosphate rock powder;

[0040] Step S12, adding fatty acid into phosphate rock powder, and performing mixing reaction at a certain temperature in a high-speed mixer to obtain fatty acid modified phosphate rock powder, wherein the mass ratio of fatty acid to phosphate rock powder is 1:100, and the mixing reaction temperature is 80 ℃, the mixing reaction time is 0.5h;

[0041] Step S13, adding the epoxy compound into the fatty acid-modified phosphate rock powder, and performing a mixing reaction at a certain temperature in a high-speed mixer to obtain a surface-modified phosphate rock powder, wherein the mass ratio of the epoxy compound to the fatty aci...

Embodiment 2

[0046] The operation steps are as shown in Example 1, wherein the mass ratio of biodegradable polyester, surface-modified phosphate rock powder and fully biodegradable color masterbatch is 70:25:1.

[0047] In the step S12, the mass ratio of fatty acid to phosphate rock powder is 10:100,

[0048] In the step S13, the mass ratio of the epoxy compound to the fatty acid is 5:1.

Embodiment 3

[0050] The operation steps are as shown in Example 1, wherein the mass ratio of biodegradable polyester, surface-modified phosphate rock powder and fully biodegradable color masterbatch is 94.9:40:1.

[0051] In the step S12, the mass ratio of fatty acid to phosphate rock powder is 20:100,

[0052] In the step S13, the mass ratio of the epoxy compound to the fatty acid is 10:1.

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Abstract

The invention discloses a preparation method of a biodegradable fertilizer efficiency agricultural film, which comprises the following steps: S1, adding biodegradable polyester and surface modified ground phosphate rock into a high-speed mixer, stirring and mixing to obtain a mixture; step S2, adding the obtained mixture into a twin-screw extruder for extrusion granulation to obtain biodegradable polyester compound granules, and step S3, mixing the obtained biodegradable polyester compound granules with full-biodegradable color master batches, and carrying out a blow molding process to obtain the biodegradable fertilizer efficiency agricultural film. According to the invention, polyester is coated on the surface of the ground phosphate rock through chemical treatment, so that the dispersion problem of the ground phosphate rock can be obviously improved, and the prepared biodegradable fertilizer efficiency agricultural film has good appearance and mechanical properties. The phosphate rock powder particles can be slowly decomposed as a fertilizer to be absorbed by soil under the action of underground microorganisms and water after the fertilizer efficiency agricultural film is degraded, so that the growth of crops is promoted.

Description

technical field [0001] The invention relates to the field of fertilizer-effect agricultural film. More specifically, the present invention relates to a biodegradable fertilizer-effect agricultural film and its preparation method and application. Background technique [0002] Agricultural mulch can effectively maintain the moisture and temperature of the soil, reduce the loss of nutrients and water, increase the yield of crops, and increase the efficiency of agricultural production. At present, plastic mulches with polyethylene (PE) as the main component are commonly used in agricultural production. However, due to its stable chemical and physical properties, plastic mulch is difficult to be degraded by microorganisms, resulting in long-term retention in nature and causing white pollution. In addition, these residual films form a barrier layer in the soil, hindering the flow of fertilizers, water, gases, etc., causing surface soil compaction and seriously affecting the ecol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08K3/32C08K9/04C08J5/18C08J3/22A01G13/02
CPCC08J5/18C08J3/223A01G13/0275C08J2367/02C08K2003/325C08K9/04
Inventor 汪锋周浩吴栋
Owner 武汉俱源科技有限公司
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