Method for preparing degradable mulching film by taking potato starch as raw material

A potato starch and raw material technology, applied in the direction of plant protection cover, can solve the problems of incomplete degradation, poor mechanical strength, polluted land, etc., and achieve the effects of low cost, high mechanical strength and good plasticity

Inactive Publication Date: 2013-08-14
XINJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, while plastic film mulching technology brings huge economic benefits to agricultural production and income, it also seriously pollutes the land due to the stability and refractory plastics.
Degradable plastics can solve the problem of white pollution caused by mulch, but at present, degradable mulch has shortcomings such as incomplete degradation, high cost, and poor mechanical strength.

Method used

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  • Method for preparing degradable mulching film by taking potato starch as raw material
  • Method for preparing degradable mulching film by taking potato starch as raw material
  • Method for preparing degradable mulching film by taking potato starch as raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: Preparation of Potato Starch and Plasticizer Blends

[0022] Add 70 parts of potato starch, 7 parts of glycerin and 3 parts of urea to 10-50 parts of water, and stir at 80-95°C for 30-40 minutes at high speed to make it evenly mixed.

Embodiment 2

[0023] Embodiment 2: Preparation of polyvinyl alcohol and plasticizer blend

[0024] Add 3-6 parts of glycerin to 30 parts of polyvinyl alcohol and grind until there are no obvious particles, then add 10-30 parts of water and 3-6 parts of urea, and stir at 80-95°C for 30-40 minutes at high speed to make it evenly mixed.

Embodiment 3

[0025] Embodiment 3: Glutaraldehyde is used as the reaction condition of crosslinking agent

[0026] Mix potato starch / plasticizer solution and polyvinyl alcohol / plasticizer solution at a mass ratio of potato starch to polyvinyl alcohol of 7:3, stir at high speed for 30-40 minutes at 80-95°C, and add water appropriately during the period; mix evenly Finally, according to the proportion of 5-10% of the starch mass, 50% concentration of glutaraldehyde is added dropwise, and the cross-linking reaction is maintained at 80-95° C. for 30-40 minutes.

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Abstract

The invention provides a method for preparing a degradable mulching film by taking potato starch as a raw material, relating to the field of degradable plastics. The method is provided for solving the problem of environmental pollution caused by the existing plastic mulching film. A completely-degradable film material is obtained from potato starch, polyvinyl alcohol, a plasticizer, a cross-linking agent and the like by blending, cross-linking reaction and then casting film formation or extrusion film formation; and the method is characterized in that specific conditions are used in the preparation process, such as the raw material composition, the weight parts of each component and the reaction conditions. By taking potato starch as a major raw material or directly using potato as a raw material, the method provided by the invention realizes uniform film formation, realizes the mechanical properties of a common polyethylene film, and can be used for degrading the mulching film material; and moreover, the preparation technology is simple, and the method has great popularization values.

Description

technical field [0001] The invention relates to the technical field of degradable plastic materials, in particular to a method for preparing a fully degradable plastic film product by using potato starch as the main raw material. Background technique [0002] Since agricultural mulch can effectively control soil temperature and humidity, reduce water and nutrient loss, prevent weed growth, and provide a favorable ecological environment for crop growth, the use of mulch is one of the main effective ways to increase the production of food and economic crops in the world. However, while plastic film mulching technology brings huge economic benefits to agricultural production and income, it also seriously pollutes the land due to the stability and refractory plastics. Degradable plastics can solve the problem of white pollution caused by mulch, but at present, degradable mulch has shortcomings such as incomplete degradation, high cost, and poor mechanical strength. Contents of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/02C08L29/04C08K5/053C08K5/21C08K5/07C08K3/32C08J3/24A01G13/02
Inventor 王帅
Owner XINJIANG NORMAL UNIVERSITY
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