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A kind of high-barrier biodegradable mulch film and its preparation method

A technology of degradable mulch and high barrier properties, which is applied in the field of film materials, can solve the problems of easy damage, poor barrier performance, and poor mechanical properties of degradable mulch films, and achieve the effects of unbreakable, good barrier performance and low production cost

Inactive Publication Date: 2019-10-29
INNER MONGOLIA AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a high-barrier biodegradable mulch film and its preparation method, which can solve the problems of poor mechanical properties, easy damage, and poor barrier performance of existing degradable mulch films

Method used

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  • A kind of high-barrier biodegradable mulch film and its preparation method
  • A kind of high-barrier biodegradable mulch film and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A high-barrier biodegradable mulch film in Example 1 is made of the following components by weight: 10 parts of wheat straw fiber, 30 parts of corn starch, 4 parts of sodium hydroxide, 1 part of polyvinyl alcohol, carboxyl 2 parts of methylcellulose, 4 parts of glyoxal, 10 parts of glycerin, 0.8 parts of cellulase, 1.5 parts of calcium stearate, 95 parts of deionized water; the wheat straw fibers are washed and dried Prepared by acid hydrolysis, specifically prepared according to the following steps:

[0031] Step 1, prepare masterbatch

[0032] Step 1.1, preparing wheat straw fiber

[0033] Washing the wheat stalks and drying them at 40°C to obtain dry stalks;

[0034] Mix 1mol / L hydrochloric acid and 5g / L citric acid evenly according to the volume ratio of 1:1 to obtain the acid solution;

[0035] Mix the dry straw and the acid solution according to the ratio of 1kg:5L evenly, stir for 20min, filter, collect the filter residue and dry it at 40°C to obtain wheat str...

Embodiment 2

[0043] A high-barrier biodegradable mulch film in Example 1 is made of the following components by weight: 9 parts of wheat straw fiber, 25 parts of corn starch, 3 parts of sodium hydroxide, 1.5 parts of polyvinyl alcohol, carboxylate 1.5 parts of methyl cellulose, 5 parts of glyoxal, 8 parts of glycerin, 1 part of cellulase, 1 part of sodium stearate, 90 parts of deionized water; the wheat straw fibers are washed and dried Prepared by acid hydrolysis, specifically prepared according to the following steps:

[0044] Step 1, prepare masterbatch

[0045] Step 1.1, preparing wheat straw fiber

[0046] Washing the wheat stalks and drying them at 45°C to obtain dry stalks;

[0047] Mix 1mol / L hydrochloric acid and 5g / L citric acid evenly according to the volume ratio of 1:1 to obtain the acid solution;

[0048] Mix the dry straw and the acid hydrolysis solution evenly in the ratio of 1kg:5L, stir for 30min, filter, collect the filter residue and dry it at 45°C to obtain wheat st...

Embodiment 3

[0056] A high-barrier biodegradable mulch film in Example 1 is made of the following components by weight: 12 parts of wheat straw fiber, 35 parts of corn starch, 4 parts of sodium hydroxide, 2 parts of polyvinyl alcohol, carboxylate 1 part of methylcellulose, 3 parts of glyoxal, 5 parts of glycerin, 0.5 part of cellulase, 1.5 parts of epoxidized soybean oil, 100 parts of deionized water; the wheat straw fibers are cleaned and dried Prepared by acid hydrolysis, specifically prepared according to the following steps:

[0057] Step 1, prepare masterbatch

[0058] Step 1.1, preparing wheat straw fiber

[0059] Washing the wheat stalks and drying them at 42°C to obtain dry stalks;

[0060] Mix 1mol / L hydrochloric acid and 5g / L citric acid evenly according to the volume ratio of 1:1 to obtain the acid solution;

[0061] Mix the dried straw and the acid solution according to the ratio of 1kg:5L evenly, stir for 25min, filter, collect the filter residue and dry it at 42°C to obtai...

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Abstract

The invention discloses a high-barrier-property biodegradable mulching film. The high-barrier-property biodegradable mulching film is prepared from the following raw materials in parts by weight: 9 to 12 parts of wheat straw fibers, 25 to 35 parts of corn starch, 3 to 5 parts of sodium hydroxide, 1 to 2 parts of polyvinyl alcohol, 1 to 2 parts of carboxymethylcellulose, 3 to 5 parts of glyoxal, 5 to 10 parts of glycerinum, 0.5 to 1 part of cellulase, 1 to 2 parts of stabilizer, and 90 to 100 parts of deionized water. According to the high-barrier-property biodegradable mulching film, corn starch and wheat straw fibers are used as main preparation raw materials, so that the preparation cost is low, the preparation method is simple, and a novel way is provided for recycling the crop straws; compared with the ordinary mulching film, the longitudinal tensile strength of the high-barrier-property biodegradable mulching film is increased by 66 percent or more, the transverse tensile strength is increased by 66 percent or more, and the stretch rate is increased by more than 58 percent, and the mulching film is uneasy to damage; the water vapor transmission rate is reduced by more than 25 percent, and the barrier property is good; and in addition, the mulching film can be completely degraded after being buried in soil for 60 days, so that the degradation effect is good.

Description

technical field [0001] The invention belongs to the technical field of thin film materials, and in particular relates to a high-barrier biodegradable plastic film and a preparation method thereof. Background technique [0002] Due to the limitation of the natural environment, the growth of many types of vegetables and their seedlings in water will be affected. In order to improve the growth environment of crops and increase crop yields, ground covering films with high thermal insulation and moisturizing properties are used in agricultural production. Traditional mulch materials are difficult to degrade and remain in the soil for a long time, which will not only cause serious compaction of the soil, but also reduce crop yields and cause environmental pollution. [0003] With the development of modern science and technology, mulch with better biodegradability has become a research hotspot. Existing studies have found that adding starch to the material components of the mulch c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L3/02C08L97/02C08L29/04C08L1/28C08K3/22C08K5/07C08K5/053
CPCC08J5/18C08J2303/02C08J2401/28C08J2429/04C08J2497/02C08L3/02C08L2201/06C08L2203/16C08L2205/035C08L2205/16C08L97/02C08L29/04C08L1/286C08K3/22C08K5/07C08K5/053
Inventor 李仙岳史海滨闫建文张景俊丁宗江郭宇孙亚楠彭遵原
Owner INNER MONGOLIA AGRICULTURAL UNIVERSITY
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