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Degradable multifunctional agricultural mulching film

A mulching film and polymer technology, applied in application, plant protection, gardening, etc., can solve the problems of uniform dispersion and unsatisfactory compatibility of polymer resins, achieve good market application prospects, less environmental damage, and prolong the action time Effect

Inactive Publication Date: 2019-02-05
JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the strong hydrogen bond force between lignin molecules, its uniform dispersion and compatibility in polymer resins are not ideal.
In the prior art, there have been reports of adding plasticizers or compatibilizers to improve dispersion and compatibility, but most of the research is limited to lignin-EVA systems

Method used

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  • Degradable multifunctional agricultural mulching film
  • Degradable multifunctional agricultural mulching film
  • Degradable multifunctional agricultural mulching film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The raw materials are mixed and pre-mixed according to the predetermined ratio, added to a single-screw extrusion granulator for extrusion molding, cooled and cut into pellets, blown into a film in a single-screw extrusion blown film machine, and dried. The manufacturing process such as figure 1 shown. Among them, the granulation temperature is 145-150°C, and the film blowing temperature is 145-150°C. Described material ratio is described in the following table:

[0023]

Embodiment 2

[0025] According to the standard GB / T1040.1-2006 / ISO 527-1:1993, the elongation at break of samples 1#-6# in Example 1 was tested. The experimental results show that the addition of plasticizer significantly increases the elongation at break of the film compared to the film without plasticizer. Among them, the elongation at break of tricresyl phosphate, dibutyl phthalate and dioctyl phthalate was higher than that of pentaerythritol and epoxy soybean oil, and compared with the film without plasticizer, they increased respectively. 34.5%, 22.6% and 27.2%.

Embodiment 3

[0027] Numbering

[0028] The obtained sample was placed in an aqueous solution of sodium hydroxide with pH=13 at room temperature for hydrolysis performance test, and the accurate mass of the sample before the test was recorded. After standing for 45 days, the samples were washed with water, dried in vacuum, and weighed again. The experimental results show that the weight loss of sample 7# is 7%, which means that the sample has begun to degrade. Wherein, adopt mass loss method to measure degradability, concrete formula is: d W =(W 0 -W) / W 0 ×100%, where, W 0 , W are the mass of the film before and after degradation respectively, d W is the weight loss percentage.

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Abstract

The invention discloses a degradable high-molecular agricultural mulching film. According to the agricultural mulching film, lignin and polymer resin serve as raw materials, a plasticizer and fertilizer are added for compounding, and single-screw extrusion and film blowing are carried out so as to obtain the agricultural mulching film. The agricultural mulching film can be slowly degraded in soil,meanwhile, the fertilizer can be released, and in addition, the slow controlled-release effect of the fertilizer is achieved. The agricultural mulching film has the advantages that the soil pollutioncan be reduced, the soil nutrient content can be conveniently increased, a preparation process is simple, the raw materials are easy to obtain, and a good industrial application prospect is achieved.

Description

technical field [0001] The invention specifically relates to a degradable multifunctional agricultural mulching film, which belongs to the field of films. Background technique [0002] As a type of plastic material, mulch plays an important role in modern agriculture, such as preventing weed growth, preventing water evaporation and soil erosion, and maintaining soil temperature. Plastic film can effectively increase the yield of crops, and has been widely used in the early seedling and growth of crops, and has the title of "Agricultural White Revolution". With the increase of plastic film production and the expansion of coverage area year by year, it has brought serious white pollution to agriculture while increasing income and production. The agricultural film used in my country's agriculture was originally polyvinyl chloride film, and then gradually developed into linear low-density polyethylene and low-density polyethylene film. The molecular structure of the above poly...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L97/00C08L91/00C08K5/053C08K5/12C08K5/521C08J5/18A01G13/02
CPCA01G13/0275C08J5/18C08J2367/04C08J2491/00C08J2497/00C08K5/053C08K5/12C08K5/521
Inventor 张荣徐磊蒋希芝严旎娜冯敏夏礼如
Owner JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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