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Degradable liquid mulching film and production method thereof

A technology of liquid mulch and aqueous solution, which is applied in the direction of chemical instruments and methods, organic fertilizers, fertilizer mixtures, etc., can solve the problems that affect the ability of soil water and fertilizer retention, low cross-linking degree, and reduced yield, so as to improve crop quality, The effect of solving white pollution and inhibiting water evaporation

Inactive Publication Date: 2014-05-07
SHANDONG SI DA KE BIODEGRADABLE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] (2) Due to the simple stirring and mixing between the components of the formula, the degree of cross-linking is not high, and the film-forming effect is not ideal; there are few hydrophilic functional groups, and the effect of increasing temperature and moisture retention of the plastic film is not strong. The impact on crop yield, after using the mulch, the crop yield is reduced by more than 5% compared with the yield of using plastic mulch
[0009] (3) According to relevant reports, since polyvinyl alcohol has a -C-C- long chain structure, although there are no plastic fragments left in the soil, the degradation time of the substance in the natural environment is longer than that of polyethylene
[0010] (4) Polyvinyl alcohol destroys the aggregate structure of the plow layer soil to a certain extent, affecting the ability of the soil to retain water and fertilizer
[0011] Therefore, compared with plastic mulch, this type of mulch is not competitive in the market

Method used

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  • Degradable liquid mulching film and production method thereof
  • Degradable liquid mulching film and production method thereof
  • Degradable liquid mulching film and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Liquid mulch raw material composition:

[0055]

[0056] Liquid mulch manufacturing method:

[0057] (1) Get 100 parts of straw papermaking black liquor (calculated on a 100% dry basis), and react with 5 parts of humic acid (calculated by 100%) under stirring for 40 minutes at a temperature of 90° C. and normal pressure. Neutralize the residual alkaline substances in papermaking black liquor, and simultaneously produce crosslinking and copolymerization reactions;

[0058] (2) Add Na to the above reaction solution 2 SO 3 0.5 parts (100% calculation), at a temperature of 90°C, stirred and reacted for 30 minutes to carry out sulfonation reaction;

[0059] (3) At a temperature of 45°C, add 2 parts of urea and 1.5 parts of melamine (100% calculation) to the above reaction solution, and stir thoroughly for 15 minutes; then lower the temperature to 25°C, and add 1% FeSO 4 1 part of aqueous solution, 30% H 2 o 2 0.5 part of aqueous solution, initiate grafting and copol...

Embodiment 2

[0062] Liquid mulch raw material composition:

[0063]

[0064] Liquid mulch manufacturing method:

[0065] (1) Take 100 parts of straw cooking slurry (calculated on a 100% dry basis), and react with 10 parts of humic acid (calculated by 100%) at a temperature of 80°C and normal pressure for 50 minutes under stirring, Neutralize the residual alkaline substances in papermaking black liquor, and simultaneously produce crosslinking and copolymerization reactions;

[0066] (2) Add Na to the above reaction solution 2 SO 3 1 part (100% calculation), stirred and reacted at a temperature of 80° C. for 30 minutes, and carried out sulfonation reaction;

[0067] (3) Add 2 parts of urea and 1 part of urotropine (100% calculation) to the above reaction solution at 40°C, and stir thoroughly for 15 minutes; then lower the temperature to 20°C, and add 1% FeSO 4 1.5 parts of aqueous solution, 30% H 2 o 2 0.8 parts of the aqueous solution, initiate the copolymerization reaction and con...

Embodiment 3

[0070] Liquid mulch raw material composition:

[0071]

[0072] Liquid mulch manufacturing method:

[0073] (1) Get 100 parts of straw papermaking black liquor (calculated on a 100% dry basis), and react with 15 parts of humic acid (calculated by 100%) under stirring for 60 minutes at a temperature of 100° C. and normal pressure. Neutralize the residual alkaline substances in papermaking black liquor, and simultaneously produce crosslinking and copolymerization reactions;

[0074] (2) Add Na to the above reaction solution 2 SO 3 2 parts (100% calculation), stirred and reacted at a temperature of 80° C. for 30 minutes, and carried out sulfonation reaction;

[0075] (3) Add 4 parts of urea, 2 parts of urotropine and 3 parts of melamine (100% calculation) to the above reaction solution at 50°C, stir thoroughly for 15 minutes; then lower the temperature to 30°C, add 1% FeSO 4 2 parts of aqueous solution, 30% H 2 o 2 1 part of aqueous solution, initiate grafting, copolyme...

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Abstract

The invention relates to a degradable liquid mulching film and a production method thereof, particularly to an environment-friendly degradable liquid mulching film with straws as a basic raw material and a production method thereof. The degradable liquid mulching film is prepared from steaming slurry of crop straws (such as wheat straws, rice straws, cotton straws, wood shavings, and the like) or straws paper-making black liquor as a main raw material by a series of reactions, such as sulfonation, crosslinking and copolymerization, of macromolecules in the slurry or the black liquor, such as lignin, cellulose and polysaccharides, under the action of a film formation additive. The macromolecules in the degradable liquid mulching film have a large amount of hydrophilic groups which can effectively catch the water molecules evaporated and diffused from soil to the air, so as to prevent water evaporation and heat loss arising therefrom, thereby increasing the temperature and preserving soil moisture. The degradable liquid mulching film is helpful for increasing crop yield and improving crop quality; and the yield is higher than that by use of a plastic mulching film, and the per mu yield is increased by more than 5%. The degradable liquid mulching film can replace the conventionally used plastic mulching film.

Description

Technical field: [0001] The invention belongs to agricultural technology and relates to the field of environmental protection, in particular to a degradable liquid mulch film with straw as a basic raw material and a manufacturing method thereof. Background technique: [0002] Plastic film mulching cultivation technology is an important means of agricultural production. The use of plastic film mulching can meet the needs of crops to increase temperature, preserve moisture, and maintain fertility. It is mainly used for early mulching of crops in northern, arid, and cold regions, as well as wind and sand fixation. Improve quality, early maturity and other functions. [0003] Relevant statistics show that the area of ​​land degradation and desertification in my country increases by 43% annually, with an average annual increase of 2,100 square kilometers of desertified land. At present, more than 80% of the arable land in our country has obstacles such as drought, low-lying area...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/52C08H5/04C09K101/00
Inventor 孟琳
Owner SHANDONG SI DA KE BIODEGRADABLE TECH CO LTD
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