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Biochar-based plastic film material and preparation method thereof

A biochar and plastic film technology, applied in the field of plastic film materials, can solve problems such as increased residual film and its fragments, ecological environment hazards, poor permeability, etc., to increase degradable performance, increase carbon sequestration capacity, reduce The effect of dosage

Inactive Publication Date: 2015-03-25
国家林业局竹子研究开发中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the increase in the use of mulch film and its refractory property will increase the residual film and its fragments in the soil, causing soil compaction and poor permeability, resulting in crop yield reduction, and its difficulty in recycling leads to its waste in nature, which has a negative impact on the ecological environment. very harmful

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Put 20kg of modified biochar, 40kg of polyethylene (low-density polyethylene, commercially available), 1.5kg of dispersant (polyethylene wax) and 1kg of silane coupling agent (KH550) into the internal mixer, heat up to 120°C, and compact Refining for 20 minutes, then transfer the banbury-mixed material into a crusher, and wait until it is broken into small pieces with a size below 3cm. When the temperature is lower than 40°C, transfer the processed material into a twin-screw extruder and heat it to Melting and plasticizing at 180°C, extruding and granulating.

[0023] The preparation method of the modified biochar is as follows: add a nitric acid solution with a mass concentration of 0.5% to the biochar, the amount of the nitric acid solution is 7% of the weight of the biochar, stir and mix evenly, and dry at 150°C until the water content is less than 0.2% .

[0024] The preparation method of the biochar is: pyrolyzing the woody material at 700° C. for 5 hours under an...

Embodiment 2

[0026] With modified biochar 40kg, polyethylene (the mixture of low-density polyethylene and linear low-density polyethylene in a mass ratio of 1:1) 60kg, dispersant (polyethylene wax and oxidized polyethylene wax in a mass ratio of 1:1 Put 2kg of the mixture) and 2.5kg of silane coupling agent (KH560) into the internal mixer, raise the temperature to 150°C, banbury for 15min, then transfer the banbury-mixed material into the crusher, and wait to be broken into small pieces with a size below 3cm , when the temperature is lower than 40°C, transfer the processed material into the twin-screw extruder, heat it to 200°C, melt and plasticize, and extrude to granulate.

[0027] The preparation method of the modified biochar is as follows: add a phosphoric acid solution with a mass concentration of 3% to the biochar, the amount of the phosphoric acid solution is 3% of the weight of the biochar, stir and mix evenly, and dry at 220°C until the water content is less than 0.2% .

[0028]...

Embodiment 3

[0030] With modified biochar 30kg, polyethylene (linear low density polyethylene, commercially available) 50kg, dispersing agent (oxidized polyethylene wax, commercially available) 1.8kg and silane coupling agent (KH550 and KH570 by the mass ratio of 1:1 Put 2kg of the mixture) into the internal mixer, raise the temperature to 130°C, banbury for 18min, then transfer the banbury-mixed material into the crusher, and wait until it is broken into small pieces with a size of less than 3cm. When the temperature is lower than 40°C, crush The machined material is transferred to a twin-screw extruder, heated to 190°C, melted and plasticized, extruded and pelletized.

[0031] The preparation method of modified biochar is: add dilute acid solution (a mixture of nitric acid solution with a mass concentration of 1.5% and a phosphoric acid solution with a mass concentration of 1% according to the volume ratio of 1:1) to the biochar, and the amount of dilute acid solution It is 5% of the wei...

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Abstract

The invention discloses a biochar-based plastic film material and a preparation method thereof. The biochar-based plastic film material is prepared by mixing the following raw materials in parts by weight: 20-40 parts of modified biochar, 40-60 parts of polyethylene, 1.5-2 parts of dispersing agent and 1-2.5 parts of coupling agent. According to the invention, the biochar is combined with plastic by a modification technology, to reduce the dosage of the plastic in agriculture and accelerate the decomposition course to plastic products so as to achieve the purpose of protecting the environment.

Description

technical field [0001] The invention relates to a plastic film material, in particular to a degradable biochar-based plastic film material and a preparation method thereof. Background technique [0002] Plastic film is a film made of polyvinyl chloride, polyethylene, polypropylene, polystyrene and other resins. Plastic film has a large amount of use, many varieties, and a wide range of applications. The market prospect is broad and the demand is constantly growing. In recent years, in order to realize short-term planting or out-of-season planting of crops, useful crops are cultivated under the cover of plastic film, that is, so-called cover cultivation or tunnel cultivation is widely carried out. [0003] The main component of agricultural mulch film is polyethylene or polypropylene, which is currently the most produced plastic product in the world. The use of plastic film is beneficial to the growth and development of crops and increases crop yield. However, the increase ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08K9/02C08K3/04C01B31/02
CPCC08J5/18C08J2323/06C08J2323/08C08J2423/06C08J2423/30C08L23/06C08L23/0815C08L2201/06C08L2203/16C08L2205/025C08L2205/035C08L2207/066C08K9/02C08K3/04C08L23/30B29B7/007
Inventor 钟哲科杨生茂翟志忠邵琼杨慧敏
Owner 国家林业局竹子研究开发中心
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