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Biodegradable composite film and preparation method thereof

A technology for mulching film and crop waste, applied in the biological field, can solve the problem of high production cost, achieve the effects of low cost, beneficial to agricultural mechanized production, and simple process

Inactive Publication Date: 2018-12-28
AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Chinese patent CN106566261A discloses a crop waste degradable mulch film and its preparation method. The unfermented waste is combined with a degradable polymer material, and the agricultural waste fiber is processed by steam explosion technology to prepare the composite material, but the steam Blasting requires special equipment and high production costs

Method used

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  • Biodegradable composite film and preparation method thereof
  • Biodegradable composite film and preparation method thereof
  • Biodegradable composite film and preparation method thereof

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preparation example Construction

[0041] The present invention also provides a method for preparing the above-mentioned degradable composite mulch film, which includes the following steps:

[0042] 1) Mix crop waste, animal manure, lime powder, bean cake, and manure straw co-starter strains according to the mass parts to obtain a fermentation mixture; after mixing the fermentation mixture with water, perform fermentation and spray microbial deodorant in sequence And after drying, the fermentation product is obtained;

[0043] 2) After mixing the degradable polymer material, crosslinking agent, reinforcing agent, plasticizer and water, a degradable polymer mixture is obtained;

[0044] 3) The fermentation product obtained in step 1) is mixed with the degradable polymer mixture obtained in step 2) to form a film to obtain a degradable composite mulch film.

[0045] The invention mixes crop waste, animal manure, lime powder, bean cake, and manure straw co-starter strains according to the mass parts to obtain a fermentati...

Embodiment 1

[0059] 1) Mix 1000kg of bagasse, 200kg of cow dung, 30kg of lime powder, 20kg of bean cake and 5.0kg of manure straw co-starter strain, to obtain a fermentation mixture; mix the obtained fermentation mixture with 300Kg of water and ferment at 50-60°C for 3 days , Spray 6.5kg of microbial deodorant and dry naturally to obtain the fermentation product.

[0060] 2) After mixing 150 kg of polyvinyl alcohol with a mass concentration of 30%, 15 kg of hydrogen peroxide, 3 kg of calcium carbonate, 3 kg of dioctyl diacid, and 150 kg of a 10% sodium alginate aqueous solution, 100 g of 10 wt. % Calcium chloride aqueous solution to obtain a degradable polymer mixture.

[0061] 3) After mixing the obtained fermentation product with the degradable dry molecule mixture, casting into a film to obtain a wet film with a thickness of 4.5 mm, and natural drying to obtain a degradable composite mulch film.

Embodiment 2

[0063] 1) After mixing 1000kg of corn stalks, 200kg of chicken manure, 10kg of plant ash, 30kg of lime powder, 20kg of bean cake and 5kg of co-starter strain of manure straw, the fermentation mixture is obtained; after mixing the fermentation mixture with 300Kg of water, cover with plastic cloth Fermentation, the temperature of fermentation is 60~70℃, after 5 days of fermentation, 5.0kg of microbial deodorant is sprayed, and after natural drying, the fermentation product is obtained;

[0064] 2) After mixing 30% polyvinyl alcohol 500 kg, acetaldehyde 20 kg, dioctyl phthalate 5 kg, 0.5 kg crosslinking agent and 100 kg 10% by mass of sodium carboxymethyl cellulose aqueous solution, the degradable Polymer mixture

[0065] 3) After mixing the obtained fermentation product with the degradable polymer mixture, casting into a film to obtain a wet film with a thickness of 25 mm, and natural drying to obtain a degradable composite mulch film.

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Abstract

The invention provides a biodegradable composite film and belongs to the technical field of biology. The biodegradable composite film is prepared from crop wastes, a cross-linking agent, an enhancer,a plasticizer, animal wastes, lime powder, soya-bean cakes, excrement and straw co-fermentation culture, a microbial deodorizer and biodegradable high polymer adhesive liquid. According to the biodegradable composite film disclosed by the invention, the fermented crop wastes are compounded with the biodegradable high polymer materials, any special equipment is not needed, the production method issimple, and the cost is low.

Description

Technical field [0001] The invention relates to the field of biotechnology, in particular to a degradable composite mulch film and a preparation method thereof. Background technique [0002] There is a large amount of agricultural mulch in my country. However, since most of the agricultural mulches used today are non-degradable plastics, it has caused serious soil pollution. In order to solve the agricultural non-point source pollution caused by agricultural mulch, a new type of degradable covering material has been developed. The covering material uses natural materials as raw materials, and can achieve the effects of moisturizing, weeding and other agricultural mulches. The covering material and its degradation products will not cause environmental pollution, and at the same time, the degradation products have fertilizer effect. At present, the degradable mulch material developed with synthetic polyester as raw material can be completely degraded. However, due to the complica...

Claims

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Application Information

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IPC IPC(8): C08L97/02C08L29/04C08L1/28C08L5/04C08L3/08C08K5/07C08K3/26C08K3/04C08K5/11C08K5/12C08J5/18A01G13/02
CPCA01G13/0275C08J5/18C08J2397/02C08J2401/28C08J2403/08C08J2405/04C08J2429/04C08K3/04C08K5/07C08K5/11C08K5/12C08K2003/262C08K2003/265Y02A40/28
Inventor 李永振李普旺杨子明吕明哲李思东
Owner AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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