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An environmentally friendly fully biodegradable mulch film and its preparation method

An environment-friendly, degradable mulch technology, applied in the field of environment-friendly fully biodegradable mulch and its preparation, can solve the problems of poor mechanical properties of mulch, long degradation cycle, unsatisfactory heat preservation and moisturizing effect, etc., and achieve short degradation cycle, Improve thermoplasticity and ensure the effect of heat preservation and moisturizing effect

Active Publication Date: 2022-03-11
甘肃济洋塑料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Patent application CN1459471A discloses a multi-functional degradable black liquid mulch film, which will be modified plant straw, coal, film-forming agent, surfactant, chemical fertilizers and micro-fertilizers, pesticides, herbicides and other raw materials required for plant growth The prepared film has poor mechanical properties, unsatisfactory thermal insulation and moisturizing effects, and a long degradation cycle.

Method used

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  • An environmentally friendly fully biodegradable mulch film and its preparation method
  • An environmentally friendly fully biodegradable mulch film and its preparation method
  • An environmentally friendly fully biodegradable mulch film and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for preparing an environment-friendly fully biodegradable mulch film, the specific steps are as follows:

[0032] (1) Firstly, corn stalk powder is used as raw material and subjected to esterification treatment to obtain esterified straw powder;

[0033] (2) Mix municipal wastewater sludge and liquor wastewater as raw materials to prepare sludge powder rich in polyhydroxyalkanoate;

[0034] (3) Then mix the soil with the coupling agent to obtain soil powder, then blend the soil powder with esterified straw powder and sludge powder, and extrude to form a film to obtain a mulch film;

[0035] Among them, the soil is pretreated before mixing and reacting with the coupling agent. The specific method is: first remove the impurities from the soil and air-dry and grind the soil, then add the soil to the water, stir and mix well, adjust the pH=1, and stir for 8 hours. Let it stand for 22 hours, filter to get the filter residue, and let it dry naturally.

[0036] In t...

Embodiment 2

[0047] A method for preparing an environment-friendly fully biodegradable mulch film. The specific steps are as follows: (1) First, corn stalk powder is used as raw material, and subjected to esterification treatment to obtain esterified straw powder;

[0048] (2) Mix municipal wastewater sludge and liquor wastewater as raw materials to prepare sludge powder rich in polyhydroxyalkanoate;

[0049] (3) Then mix the soil with the coupling agent to obtain soil powder, then blend the soil powder with esterified straw powder and sludge powder, and extrude to form a film to obtain a mulch film;

[0050] Among them, the soil is pretreated before mixing and reacting with the coupling agent. The specific method is: first remove the impurities from the soil and air-dry and grind the soil, then add the soil to water, stir and mix well, adjust the pH=1.5, and stir for 6 hours. Let it stand for 25 hours, filter to get the filter residue, and let it dry naturally.

[0051] In the process of...

Embodiment 3

[0062] A method for preparing an environment-friendly fully biodegradable mulch film, the specific steps are as follows:

[0063] (1) Firstly, corn stalk powder is used as raw material and subjected to esterification treatment to obtain esterified straw powder;

[0064] (2) Mix municipal wastewater sludge and liquor wastewater as raw materials to prepare sludge powder rich in polyhydroxyalkanoate;

[0065] (3) Then mix the soil with the coupling agent to obtain soil powder, then blend the soil powder with esterified straw powder and sludge powder, and extrude to form a film to obtain a mulch film;

[0066] Among them, the soil is pretreated before mixing and reacting with the coupling agent. The specific method is: first remove the impurities from the soil and air-dry and grind the soil, then add the soil to the water, stir and mix well, adjust the pH=1, and stir for 7 hours. Let it stand for 23 hours, filter to get the filter residue, and let it dry naturally.

[0067] In t...

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Abstract

The invention provides an environment-friendly fully biodegradable mulch film and a preparation method thereof. The invention first uses corn stalk powder as a raw material, undergoes esterification treatment to obtain esterified straw powder; then uses municipal wastewater sludge and liquor wastewater as the The raw materials are mixed to prepare sludge powder rich in polyhydroxyalkanoate; then the soil is mixed with a coupling agent to obtain soil powder, and then the soil powder is blended with esterified straw powder and sludge powder, and extruded to form a film to obtain A kind of mulch. The raw materials of the mulch film come from nature or waste water, which realizes the reuse of waste and is naturally environmentally friendly. It is fully biodegradable and has a short degradation cycle, and is an environmentally friendly mulch film. Moreover, the mulch film has good mechanical properties and heat preservation and moisturizing effects, and has excellent promotion value.

Description

technical field [0001] The invention relates to the technical field of thin film materials, in particular to an environment-friendly fully biodegradable plastic film and a preparation method thereof. Background technique [0002] In recent years, in order to improve the growth environment of crops and increase crop yields, high-efficiency thermal insulation and moisturizing ground covering films have been used in agricultural production. The use of mulch can meet the needs of crops for heat preservation, moisture protection, frost protection, and fertility maintenance. However, after years of use, plastic mulch is difficult to decompose in the natural environment, easy to break, and difficult to recycle. It is scattered in the natural environment, causing serious damage to the soil and the environment. It also hinders the infiltration of soil capillary water, precipitation and irrigation water, affects the hygroscopicity of the soil, affects the growth and development of cro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L97/02C08L97/00C08L67/04C08K11/00C08K9/06C08J5/18C08H8/00
CPCC08J5/18C08H8/00C08J2397/02C08J2497/00C08J2467/04C08K11/005C08K9/06
Inventor 姜世华刘涛刘俊岩姜海
Owner 甘肃济洋塑料有限公司
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