Fertilizer-type biodegradable mulching film and preparation method thereof

A biodegradable and biodegradable plastic technology is applied in the field of fertilizer-type biodegradable plastic film and its preparation, which can solve the problems that the function of temperature increase and moisture preservation does not meet the needs of crop growth, increase the processing cost, and be difficult to practical application, etc. Conducive to recycling and improving the effect of application value

Active Publication Date: 2020-05-19
INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low utilization efficiency of biodegradable mulch fertilizer produced by blending lignin and degradable plastics, the color is brown, the light transmittance is poor, and the hydrophilicity and water permeability are strong. application; at the same time, the method provided by the invention needs to carry out ammonification or phosphating treatment of lignin, which increases the processing cost

Method used

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  • Fertilizer-type biodegradable mulching film and preparation method thereof
  • Fertilizer-type biodegradable mulching film and preparation method thereof
  • Fertilizer-type biodegradable mulching film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A kind of biodegradable film, raw material is composed of: PBAT 73.0 parts by weight, sodium alginate coated urea (2000 mesh, urea content is 50%) 20.0 parts by weight, talcum powder 5.0 parts by weight, ultraviolet stabilizer UV3853 1.0 parts by weight, anti- Oxidant B900 1.0 parts by weight.

[0032] The preparation method of sodium alginate coated urea (2000 mesh) is as follows:

[0033] (1) Take 2% sodium alginate solution as the water phase, add urea, and stir evenly;

[0034] (2) Use isooctane solution as the oil phase, add Span-80, stir evenly, and preheat in a 40°C water bath for 10 minutes;

[0035] (3) Add the sodium alginate solution containing urea dropwise into the oil phase, stir while adding dropwise, continue stirring at high speed for 60 minutes after the dropwise addition, and then add 8% CaCl dropwise 2 solution and continue to stir the emulsion for 30 minutes, fully washed with absolute ethanol and distilled water, dried at room temperature and the...

Embodiment 2

[0048] A biodegradable mulching film, the raw materials are: 70.0 parts by weight of PBAT, 13.0 parts by weight of PLA, 10.0 parts by weight of chitosan-coated ammonium monohydrogen phosphate microspheres (2500 mesh, content of ammonium monohydrogen phosphate is 20%), mica 5.0 parts by weight of tablet, 0.5 parts by weight of oleic acid, 0.5 parts by weight of chain extender ADR-4400, 0.5 parts by weight of ultraviolet stabilizer UV 326, and 0.5 parts by weight of antioxidant B215.

[0049] The preparation method of chitosan-coated ammonia monohydrogen phosphate microspheres is as follows:

[0050] (1) dissolve chitosan with 2% glacial acetic acid, add ammonium monohydrogen phosphate, stir;

[0051] (2) Use liquid paraffin as the oil phase, add Span-80, stir evenly, then slowly add the spare mixed solution described in step (1) in a 40°C constant temperature water bath under the stirring condition of 1500r / min, and continue Stir for 1h;

[0052] (3) Add a certain amount of g...

Embodiment 3

[0064] A kind of biodegradable film, raw material is composed of: 60.0 parts by weight of PBAT, 10.0 parts of PPC, polyvinyl alcohol-coated ammonium monohydrogen phosphate microspheres (5000 mesh, ammonium monohydrogen phosphate content is 50%) 10.0 parts by weight, potassium sulfate ( 5000 mesh) 10.0 parts by weight, 5.0 parts by weight of modified talcum powder, 1.0 parts by weight of ultraviolet stabilizer UV3853, 1.0 parts by weight of antioxidant B225, 3.0 parts by weight of carrier-free black masterbatch 330BK.

[0065] The preparation method of polyvinyl alcohol coated monohydrogen ammonia phosphate microspheres is as follows:

[0066] (1) Configure the PVA solution with a mass fraction of 5% as the water phase, add ammonium monohydrogen phosphate, and stir evenly;

[0067] (2) Use liquid paraffin as the oil phase, add Span-80, and stir evenly;

[0068] (3) Add fully mixed and uniform water phase to the oil phase, add 2.0g STMP crosslinking agent, add 1mL NaOH as a cat...

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Abstract

The invention relates to the technical field of biodegradable mulching films, in particular to a fertilizer-type biodegradable mulching film and a preparation method thereof. The fertilizer-type biodegradable mulching film is prepared from raw materials containing the following components in parts by weight: 70.0-95.0 parts of biodegradable plastic, 0.5-30.0 parts of fertilizer, 0-15.0 parts of alubricant, 0-2.0 parts of a light stabilizer, 0-1.5 part of an antioxidant, 0-2.0 parts of a chain extender and 0-6.0 parts of color master batches. The fertilizer-type biodegradable mulching film canprovide or supplement the fertilizer for crops in the growth period, the fertilizer is released after degradation, and a large amount of small holes appear in the mulching film, so that the fertilizer fully reacts with moisture and microorganisms in the environment, the degradation is accelerated, mulching film residues in the crop harvesting period are reduced or avoided, crop harvesting and straw recycling are facilitated, the process of partial crop film uncovering can be removed, and the film uncovering cost is reduced.

Description

technical field [0001] The invention relates to the technical field of biodegradable mulch, in particular to a fertilizer-type biodegradable mulch and a preparation method thereof. Background technique [0002] Plastic film has made a huge contribution to the increase of agricultural production and income in my country, but at the same time it has also caused serious "white pollution". Under the premise that plastic film mulching technology cannot be replaced and the recycling system of residual film is not perfect, the promotion of biodegradable plastic film is one of the important technical ways to solve the pollution of residual film. [0003] The degradable plastics that have been applied to biodegradable mulch films are mainly polyester products, including polybutylene terephthalate / adipate (PBAT), polybutylene succinate / adipate (PBSA ), polylactic acid (PLA), polypropylene carbonate (PPC), polyhydroxyalkanoate (PHA), polybutylene succinate (PBS), etc. These materials...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G13/02A01C15/00C08L67/02C08L67/04C08L69/00C08K13/06C08K9/10C08K5/21C08K3/34C08K3/32C08K7/00C08K3/30C08K3/38C08K3/28C08K13/02C08K9/06C08J5/18B29D7/01
CPCA01G13/0275A01C15/00C08J5/18B29D7/01C08J2367/02C08J2467/04C08J2469/00C08K13/06C08K9/10C08K5/21C08K3/34C08K2003/322C08K7/00C08K2003/3045C08K2003/387C08K13/02C08K2003/385C08K3/28C08K9/06Y02A40/28
Inventor 刘琪何文清刘家磊刘勤李真董闫闫
Owner INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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