Agricultural liquid ground cover film, preparation and use method thereof

A ground covering and liquid technology, which is applied in the field of agrochemicals, can solve the problems of poor heat preservation and moisture conservation, high cost of mulching film manufacturing, and difficulty in popularization and use, and achieve the effects of improving physical properties, avoiding secondary pollution, and reducing labor intensity

Inactive Publication Date: 2008-10-08
孙广利
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In this regard, there are many Chinese patents that have carried out a lot of research on related technologies for replacing the above-mentioned plastic mulches. Various liquid plastic mulches, but most of these plastic mulches partially contain polyolefin or polyvinyl alcohol, and polyolefin or polyvinyl alcohol is also a petroleum derivative, which is not easy to decompose, and long-term use will cause damage to the soil, resulting in soil compaction And produce toxicity, so it is difficult to promote the use
Although the liquid mulch film disclosed in the Chinese patent application documents with the application number 02121393.3 and 200710066872.8 does not contain polyolefin or polyvinyl alcohol, for example, the liquid mulch film disclosed in the patent application document with the application number 02121393.3 is composed of lignin, shell Polysaccharide, collagen, surfactant and foaming agent are mixed. This kind of mulch can avoid the disadvantages of plastic mulch, but the production cost of this kind of mulch is high, and it is difficult to popularize and use, and its heat preservation and moisture retention are less effective. Difference

Method used

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  • Agricultural liquid ground cover film, preparation and use method thereof

Examples

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Embodiment 1

[0026] Example 1: Add 6 grams of chitin and 10 grams of gelatin to 50 grams of water to prepare a mixed solution; disperse 40 grams of sodium lignosulfonate in 70 grams of water, stir well, and then add 20 grams of modified starch in the solution , at 90°C, gelatinize for 45 minutes to form a transparent and viscous starch paste, then add the pre-prepared mixture of chitin and gelatin, and finally, add 4 grams of sodium dodecylbenzenesulfonate to the mixed in aqueous solution. Adjust the pH to 4, add 0.1 g of N,N-methylenebisacrylamide, and pass N at 50°C 2 Stir and polymerize for 2 hours to obtain an agricultural degradable liquid mulch film.

Embodiment 2

[0027] Example 2: Add 4 grams of chitin and 6 grams of gelatin to 40 grams of water to prepare a mixed solution; disperse 50 grams of sodium lignosulfonate in 88 grams of water, stir well, then add 10 grams of modified starch in the solution , at 78°C, gelatinize for 40 minutes to form a transparent and viscous starch paste, then add the pre-prepared mixture of chitin and gelatin, and finally, add 2 grams of sodium dodecylbenzenesulfonate to the mixed in aqueous solution. Adjust the pH value to 2, add 0.2 g of N, N-methylenebisacrylamide, and pass N at 45°C 2 Stir and polymerize for 1.5 hours to obtain an agricultural degradable liquid mulch film.

Embodiment 3

[0028] Example 3: Add 6 grams of chitin and 8 grams of gelatin to 45 grams of water to prepare a mixed solution; disperse 50 grams of sodium lignosulfonate in 73 grams of water, stir well, then add 15 grams of modified starch in the solution , at 80°C, gelatinize for 40 minutes to form a transparent and viscous starch paste, then add the pre-prepared mixture of chitin and gelatin, and finally, add 3 grams of sodium dodecylbenzenesulfonate to the mixed in aqueous solution. Adjust the pH value to 3, add 0.4 g of N, N-methylenebisacrylamide, and pass N at 40°C 2 Stir and polymerize for 1 hour to obtain an agricultural degradable liquid mulch film.

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Abstract

The invention relates to an agricultural liquid ground covering membrane, which is composed of the following components: 20-25wt% of lignin sulfonate, 5-10wt% of modified starch, 2-3wt% of chitin; 3-5wt% of gelatin; 1-2wt% of surfactant; 0.05-0.3 of cross-linker, and 55-65wt% of water, wherein, sodium dodecylbenzenesulfonate is the surfactant optimum; N,N-methylenebisacrylamide is the cross-linker optimum.

Description

technical field [0001] The invention belongs to the technical field of agricultural chemistry, and in particular relates to a fully biodegradable agricultural liquid ground covering film and a preparation and application method thereof. Background technique [0002] At present, plastic mulch is mostly used in farmland. The application of plastic mulch can meet the needs of crops for heat preservation, moisture conservation, fertility maintenance, and increase in production and income. The side effects produced by the massive use of the drug are also quite huge, which has aroused the great attention of the relevant state departments and the widespread concern of the public. Plastic mulch is made of polyethylene or polystyrene, which is non-degradable and difficult to recycle and reuse, which poses a hazard to environmental sanitation and produces a large amount of secondary pollution. After years of accumulation, the mulch fragments left in the soil lead to the deterioration...

Claims

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Application Information

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IPC IPC(8): C08L3/04C08J3/24C09K17/52C08K5/42C08L89/00C08L5/08C08K5/20
Inventor 孙广利
Owner 孙广利
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