Biodegradable agricultural mulch film capable of retaining water and increasing fertility and preparation method thereof

A biodegradable and agricultural mulch technology, applied in the field of agricultural applications, can solve problems such as environmental pollution and soil damage, and achieve high added value, soil improvement, and soil repair effects

Active Publication Date: 2017-11-07
XIAN JIBANG NEW AGROCHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a water-retaining and fertilizing biodegradable agricultural mulch film and its preparation method to overcome the problems of soil damage and environmen

Method used

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  • Biodegradable agricultural mulch film capable of retaining water and increasing fertility and preparation method thereof
  • Biodegradable agricultural mulch film capable of retaining water and increasing fertility and preparation method thereof
  • Biodegradable agricultural mulch film capable of retaining water and increasing fertility and preparation method thereof

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preparation example Construction

[0024] A water-retaining and fertilizing biodegradable agricultural mulch film and a preparation method thereof disclosed by the present invention comprise the following steps:

[0025] 1) Preparation of humic acid: Take low-rank coal and grind it on a ball mill to pass through a 100-mesh sieve, put the ground low-rank coal into the reactor, add KOH solution, heat to 40-90°C, and react for 30-90 minutes Finally, remove the insoluble impurities by suction filtration while it is hot, and the obtained filtrate is the reaction solution. After the reaction solution is cooled to room temperature, add hydrochloric acid to adjust the pH value to acidity. Suction filtration under reduced pressure was carried out, and the filter cake was dried to constant weight at 55°C to obtain low-order coal-based humic acid.

[0026] 2) The obtained low-rank coal-based humic acid and hydrophilic monomers, initiators, and crosslinking agents are mixed in a weight ratio of (1-5): (8-20): (0.005-1): (0...

Embodiment 1

[0030] A method for preparing a water-retaining and fertilizing biodegradable agricultural mulch film, comprising the following steps:

[0031] 1) Take lignite and grind it on a ball mill to pass through a 100-mesh sieve, put it into the reactor, add KOH solution with a mass fraction of 30% according to the mass ratio of material to liquid 1:10, heat to 40°C, react for 50 minutes, and pump while it is hot Insoluble impurities were removed by filtration. After the reaction solution is cooled to room temperature, add hydrochloric acid to adjust the pH=4. At this time, humic acid begins to precipitate. After standing for a period of time until no new solid precipitates, perform vacuum filtration and dry at 55°C to constant weight to obtain low-order Coal-based humic acid;

[0032] 2) Prepare low-rank coal by reacting the obtained low-rank coal-based humic acid with acrylic acid, potassium persulfate, and N,N'-methylenebisacrylamide in a weight ratio of 1:8:0.01:0.05 at 50°C for ...

Embodiment 2

[0035] A method for preparing a water-retaining and fertilizing biodegradable agricultural mulch film, comprising the following steps:

[0036] 1) Take lignite and grind it on a ball mill to pass through a 100-mesh sieve, put it into the reactor, add 10% KOH solution according to the mass ratio of material to liquid 1:20, heat to 60°C, react for 30 minutes, and remove the insoluble by suction filtration while it is hot Impurities. After the reaction solution is cooled to room temperature, add hydrochloric acid to adjust the pH=6. At this time, humic acid begins to precipitate. After standing for a period of time until no new solid precipitates, perform vacuum filtration, dry at 55°C to constant weight, and obtain low-order Coal-based humic acid;

[0037] 2) react low-rank coal-based humic acid with acrylamide, ammonium persulfate, and boric acid in a weight ratio of 2.5:10:0.02:0.3 at 65°C for 3.5 hours to prepare low-rank coal-based humic acid superabsorbent resin;

[0038]...

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Abstract

The invention discloses a biodegradable agricultural mulch film capable of retaining water and increasing fertility and a preparation method thereof, and belongs to the field of agricultural application. The biodegradable agricultural mulch film is prepared from the following steps: 1) heating ground low-rank coal and a KOH solution to 40 to 90 DEG C, carry out suction filtration to obtain filter liquor after reacting, cooling, regulating a pH value to the acidity, standing till no fixity is separated out, then carrying out pressure-reducing suction filtration, drying filter cake, obtaining low-rank coal based humic acid; 2) carrying out reaction on the low-rank coal based humic acid and hydrophilic monomer, an initiating agent and a coupling agent for preparing low-rank based humic acid super absorptive resin; 3) taking biodegradable material and the low-rank based humic acid super absorptive resin, mixing for granulating, and carrying out film blowing, so as to obtain the biodegradable agricultural mulch film. According to the preparation method, the problems that the traditional mulch film brings soil damage and environment pollution and the like are overcome, the totally green and environment-friendly biodegradable agricultural mulch film is provided, humic acid capable of retaining water and increasing fertility is released out as the mulch film is degraded, and growth quality of crops is further effectively improved.

Description

technical field [0001] The invention belongs to the field of agricultural applications, and in particular relates to a water-retaining and fertilizing-enhancing biodegradable agricultural mulch film and a preparation method thereof. Background technique [0002] Agricultural plastic film is a mature cultivation technology, which can maintain soil moisture, improve water use efficiency, alleviate the problem of soil water shortage in arid and semi-arid areas, and at the same time improve the growth environment of crops, which is conducive to crop growth and development, increases crop yield and agricultural benefits, and ensures It has improved crop yields and alleviated the problem of restricting China's agricultural production due to drought and water shortage. [0003] However, most of the currently used agricultural mulch films use high-molecular PE and PVC polymers, which are neither eroded by microorganisms nor decomposed by themselves in the soil, which will not only c...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L51/08C08H99/00C08F289/00C08F220/06C08F220/56C08F222/06
CPCC08F289/00C08H99/00C08J5/18C08J2367/02C08J2499/00C08L67/02C08L2201/06C08L2203/16C08L51/08C08F220/06C08F220/56C08F222/06
Inventor 宋洁牛育华骆筱延小雨
Owner XIAN JIBANG NEW AGROCHEM IND
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