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Preparation method of full-degradable seed film added with straw powder

A technology of straw powder and seed film, which is applied in the field of preparation of fully degradable film, can solve problems such as hindering agricultural production and environmental pollution, and achieve the effects of improving land fertility, reducing costs, and wide application prospects

Inactive Publication Date: 2021-10-01
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The current agricultural mulch is usually made of non-degradable PE, PP, PVC, which pollutes the environment and even hinders agricultural production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A fully degradable seed film blown film material added with straw powder, and its material ratio is:

[0035] Straw powder 35 servings

[0036] 3 parts glycerin

[0037] 3 parts polyethylene glycol

[0038] 1010 0.05 servings

[0039] 3,4-dihydro-1,2-naphthalenedicarboxylic anhydride 3 parts

[0040] 55 servings of PBAT

[0041] The specific implementation steps are as follows:

[0042] Step 1: pulverize the straw powder to 500 mesh to 800 mesh, and dry until the water content reaches less than 3% for use;

[0043] Step 2: use 3 parts of esterification agent 3,4-dihydro-1,2-naphthalenedicarboxylic acid anhydride to esterify and modify the straw powder;

[0044] Step 3: Weigh 35 parts of the esterified straw powder, 3 parts of glycerol, 3 parts of polyethylene glycol, and 0.05 part of antioxidant 1010 according to parts by mass;

[0045] Step 4: Extrude the mixture obtained in step 2 with a twin-screw extruder, the diameter of the twin-screw is: 75mm, the length o...

Embodiment 2

[0049] A fully degradable seed film blown film material added with straw powder, and its material ratio is:

[0050] Straw powder 35 servings

[0051] 4 parts glycerin

[0052] 4 parts polyethylene glycol

[0053] 1010 0.05 servings

[0054] 3,4-dihydro-1,2-naphthalenedicarboxylic anhydride 4 parts

[0055] 55 servings of PBAT

[0056] The specific implementation steps are as follows:

[0057] Step 1: pulverize the straw powder to 500 mesh to 800 mesh, and dry until the water content reaches less than 3% for use;

[0058] Step 2: use 4 parts of esterification agent 3,4-dihydro-1,2-naphthalenedicarboxylic acid anhydride to esterify and modify the straw powder;

[0059] Step 3: Weigh 35 parts of straw powder, 4 parts of glycerol, 4 parts of polyethylene glycol, 0.05 parts of antioxidant 1010, and 4 parts of 3,4-dihydro-1,2-naphthalenedicarboxylic acid anhydride according to parts by mass;

[0060] Step 4: Extrude the mixture obtained in step 2 with a twin-screw extruder, ...

Embodiment 3

[0064] A fully degradable seed film blown film material added with straw powder, and its material ratio is:

[0065] Straw powder 35 servings

[0066] 5 parts glycerin

[0067] 5 parts polyethylene glycol

[0068] 1010 0.05 servings

[0069] 3,4-dihydro-1,2-naphthalenedicarboxylic anhydride 5 parts

[0070] 55 servings of PBAT

[0071] The specific implementation steps are as follows:

[0072] Step 1: pulverize the straw powder to 500 mesh to 800 mesh, and dry until the water content reaches less than 3% for use;

[0073] Step 2: use 5 parts of esterification agent 3,4-dihydro-1,2-naphthalenedicarboxylic acid anhydride to esterify and modify the straw powder;

[0074] Step 3: Weigh 35 parts of straw powder, 5 parts of glycerol, 5 parts of polyethylene glycol, 0.05 parts of antioxidant 1010, and 5 parts of 3,4-dihydro-1,2-naphthalenedicarboxylic acid anhydride according to parts by mass

[0075] Step 4: Extrude the mixture obtained in step 2 with a twin-screw extruder, the...

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Abstract

The invention relates to a preparation method of a fully-degradable film, in particular to a preparation method of a fully-degradable seed film added with straw powder, which comprises the following specific preparation steps: crushing the straw powder to 500-800 meshes, and drying until the water content is lower than 3% for later use; esterifying and modifying the straw powder by using an esterifying agent; weighing 35 to 40 parts by mass of the esterified straw powder, 3 to 5 parts by mass of a plasticizer, 3 to 5 parts by mass of a compatibilizer and 0.05 to 0.1 part by mass of an antioxidant; extruding the mixture obtained in the step 2 by using a double-screw extruder; after being extruded, performing blowing traction on the material by a motor according to a fixed proportion, wherein the blowing ratio is the transverse expansion multiple of the film; and cooling the film to the room temperature through a fan air ring after being blown up and drawn, and winding the cooled film by a winding machine after being split by a double-side splitting knife. The cost is reduced, the strength of the degradable film is improved, breeding and rice transplanting are combined, and the agricultural production efficiency is improved.

Description

technical field [0001] The invention relates to a preparation method of a fully degradable film, in particular to a preparation method of a fully degradable seed film by adding straw powder. Background technique [0002] Adipic-terephthalic-butylene-diester copolymer (PBAT) is a biodegradable aromatic polyester. PBAT can be decomposed into carbon dioxide and water by microorganisms in the soil. Studies have shown that PBAT is almost fully biodegradable under certain conditions, and PBAT does not cause harm to the environment in the composting experiment. The flexible aliphatic segment makes it have good degradation performance, and the rigid aromatic polyester makes it have excellent mechanical properties. , heat resistance and impact resistance. [0003] my country's crop straw resources are abundant, but crop straws are not well utilized, and are largely burned directly by farmers, which causes serious air pollution. The development of straw-based renewable material tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L67/02C08L97/02C08L71/02
CPCC08J5/18C08J2367/02C08J2497/02C08J2471/02
Inventor 唐恺鸿葛铁军张扬李若霖高江波王祉溦
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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