CN114369346A - Biodegradable plastic garbage bag and preparation method thereof - Google Patents
Biodegradable plastic garbage bag and preparation method thereof Download PDFInfo
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- CN114369346A CN114369346A CN202111440296.5A CN202111440296A CN114369346A CN 114369346 A CN114369346 A CN 114369346A CN 202111440296 A CN202111440296 A CN 202111440296A CN 114369346 A CN114369346 A CN 114369346A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J5/06—Reinforcing macromolecular compounds with loose or coherent fibrous material using pretreated fibrous materials
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2477/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
- C08J2477/10—Polyamides derived from aromatically bound amino and carboxyl groups of amino carboxylic acids or of polyamines and polycarboxylic acids
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/346—Clay
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/02—Ingredients treated with inorganic substances
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Abstract
The invention discloses a biodegradable plastic garbage bag and a preparation method thereof. The biodegradable plastic garbage bag comprises the following raw materials in parts by weight: 100-120 parts of PLA, 100-120 parts of PBAT, 2-5 parts of filler, 4-8 parts of compatilizer and 1-3 parts of antioxidant; the filler is modified aramid fiber and is obtained by the following method: placing aramid fibers in a silane coupling agent solution, soaking for 30-40min under a shaking condition, and then placing in a drying oven for drying to obtain the modified aramid fibers. The plastic garbage bag provided by the invention adopts PLA and PBAT as main raw materials, the strength of the composite material is improved by adding the filler, and meanwhile, the combination between two phases is improved by adding the compatilizer, so that the overall strength of the plastic garbage bag is improved.
Description
Technical Field
The invention relates to a biodegradable plastic garbage bag and a preparation method thereof, belonging to the technical field of plastics.
Background
The plastic bag is a bag made of plastic (common plastic such as polypropylene, polyester, nylon and the like) as a main raw material, is an essential article in daily life of people, and is often used for containing other articles. The plastic bag has the advantages of low price, extremely light weight, large capacity and convenient storage, but is prohibited from production and use by some countries due to the defects of extremely long degradation period and difficult processing of the plastic bag. The plastic with the novel function is characterized in that after the plastic is abandoned for a certain service life, the plastic is degraded under specific environmental conditions due to obvious change of chemical structure, certain performance loss and appearance change are caused, and the plastic is harmless or less harmful to the natural environment.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a biodegradable plastic garbage bag and a preparation method thereof.
The invention is realized by the following technical scheme:
a biodegradable plastic garbage bag comprises the following raw materials in parts by weight: 100-120 parts of PLA, 100-120 parts of PBAT, 2-5 parts of filler, 4-8 parts of compatilizer and 1-3 parts of antioxidant; the filler is modified aramid fiber and is obtained by the following method: placing aramid fibers in a silane coupling agent solution, soaking for 30-40min under a shaking condition, and then placing in a drying oven for drying to obtain the modified aramid fibers.
The biodegradable plastic garbage bag is characterized in that the aramid fiber is meta-aramid fiber.
The biodegradable plastic garbage bag is characterized in that the weight ratio of the aramid fiber to the silane coupling agent solution is 1: 10-12.
The biodegradable plastic garbage bag is characterized in that the compatilizer is modified montmorillonite.
The biodegradable plastic garbage bag is characterized in that the modified montmorillonite is obtained by the following steps: and placing the montmorillonite in a dilute sulfuric acid solution, reacting for 40-60min under an ultrasonic condition, washing, and drying in an oven to obtain the modified montmorillonite.
The biodegradable plastic garbage bag is characterized in that the weight ratio of the montmorillonite to the dilute sulfuric acid solution is 1: 5-6.
The biodegradable plastic garbage bag is characterized in that the mass fraction of sulfuric acid in the dilute sulfuric acid solution is 15-30%.
The biodegradable plastic garbage bag is characterized in that the antioxidant is antioxidant 1010 or antioxidant 1076.
The preparation method of the biodegradable plastic garbage bag comprises the following steps: PLA, PBAT, a filler, a compatilizer and an antioxidant are mixed and then added into a double-screw extruder, composite particles are prepared by melting, extruding, granulating and drying, and the plastic particles are processed into plastic bags by a blow molding machine.
The invention achieves the following beneficial effects:
the plastic garbage bag provided by the invention adopts PLA and PBAT as main raw materials, the strength of the composite material is improved by adding the filler, and meanwhile, the combination between two phases is improved by adding the compatilizer, so that the overall strength of the plastic garbage bag is improved.
The compatilizer of the invention adopts the modified montmorillonite which reduces the interfacial tension between two phases, so that a certain relation is generated between the two phases, the combination of the PLA phase and the PBAT phase is facilitated, the formation of a continuous phase is promoted, and the compatibility of the composite material is improved, thereby improving the performance of the blend.
The filler adopts modified aramid fiber, and the silane coupling agent solution is adopted to act on the aramid fiber, so that the surface compatibility of the aramid fiber is improved, and the compatibility of the aramid fiber and other raw materials is improved, thereby enhancing the strength of the blend.
Detailed Description
The invention is further described below. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example 1
A biodegradable plastic garbage bag comprises the following raw materials in parts by weight: 120 parts of PLA, 120 parts of PBAT, 5 parts of filler, 4 parts of modified montmorillonite and 10101 parts of antioxidant; the filler is modified aramid fiber and is obtained by the following method: and (2) placing the meta-aramid fiber in a silane coupling agent solution, soaking for 30-40min under a shaking condition, and then placing in a drying oven for drying to obtain the modified aramid fiber.
Wherein the weight ratio of the meta-aramid fiber to the silane coupling agent solution is 1: 10.
the modified montmorillonite is obtained by the following steps: and placing the montmorillonite in a dilute sulfuric acid solution, reacting for 40-60min under an ultrasonic condition, washing, and drying in an oven to obtain the modified montmorillonite. The weight ratio of the montmorillonite to the dilute sulfuric acid solution is 1: 5. The mass fraction of the sulfuric acid in the dilute sulfuric acid solution is 30%.
A method for preparing a biodegradable plastic garbage bag comprises the following steps: PLA, PBAT, a filler, a compatilizer and an antioxidant are mixed and then added into a double-screw extruder, composite particles are prepared by melting, extruding, granulating and drying, and the plastic particles are processed into plastic bags by a blow molding machine.
Example 2
A biodegradable plastic garbage bag comprises the following raw materials in parts by weight: 100 parts of PLA, 100 parts of PBAT, 2 parts of filler, 8 parts of modified montmorillonite and 10763 parts of antioxidant; the filler is modified aramid fiber and is obtained by the following method: placing aramid fibers in a silane coupling agent solution, soaking for 30-40min under a shaking condition, and then placing in a drying oven for drying to obtain the modified aramid fibers.
Wherein the weight ratio of the aramid fiber to the silane coupling agent solution is 1: 12.
the modified montmorillonite is obtained by the following steps: and placing the montmorillonite in a dilute sulfuric acid solution, reacting for 40-60min under an ultrasonic condition, washing, and drying in an oven to obtain the modified montmorillonite. The weight ratio of the montmorillonite to the dilute sulfuric acid solution is 1: 6. The mass fraction of the sulfuric acid in the dilute sulfuric acid solution is 15%.
A method for preparing a biodegradable plastic garbage bag comprises the following steps: PLA, PBAT, a filler, a compatilizer and an antioxidant are mixed and then added into a double-screw extruder, composite particles are prepared by melting, extruding, granulating and drying, and the plastic particles are processed into plastic bags by a blow molding machine.
Example 3
A biodegradable plastic garbage bag comprises the following raw materials in parts by weight: 110 parts of PLA, 110 parts of PBAT, 3 parts of filler, 5 parts of modified montmorillonite and 10102 parts of antioxidant; the filler is modified aramid fiber and is obtained by the following method: and (2) placing the meta-aramid fiber in a silane coupling agent solution, soaking for 30-40min under a shaking condition, and then placing in a drying oven for drying to obtain the modified aramid fiber.
Wherein the weight ratio of the meta-aramid fiber to the silane coupling agent solution is 1: 11.
the modified montmorillonite is obtained by the following steps: and placing the montmorillonite in a dilute sulfuric acid solution, reacting for 40-60min under an ultrasonic condition, washing, and drying in an oven to obtain the modified montmorillonite. The weight ratio of the montmorillonite to the dilute sulfuric acid solution is 1: 5. The mass fraction of the sulfuric acid in the dilute sulfuric acid solution is 20%.
A method for preparing a biodegradable plastic garbage bag comprises the following steps: PLA, PBAT, a filler, a compatilizer and an antioxidant are mixed and then added into a double-screw extruder, composite particles are prepared by melting, extruding, granulating and drying, and the plastic particles are processed into plastic bags by a blow molding machine.
Comparative example 1
A biodegradable plastic garbage bag comprises the following raw materials in parts by weight: 110 parts of PLA, 110 parts of PBAT, 3 parts of filler and 10102 parts of antioxidant; the filler is modified aramid fiber and is obtained by the following method: and (2) placing the meta-aramid fiber in a silane coupling agent solution, soaking for 30-40min under a shaking condition, and then placing in a drying oven for drying to obtain the modified aramid fiber.
Comparative example 2
A biodegradable plastic garbage bag comprises the following raw materials in parts by weight: 110 parts of PLA, 110 parts of PBAT, 3 parts of aramid fiber, 5 parts of modified montmorillonite and 10102 parts of antioxidant.
The plastic bags in the examples and the comparative examples were subjected to performance tests and biodegradation tests at the same time, wherein the biodegradation tests are carried out by referring to GB/T19275-2003 evaluation of potential biodegradation and disintegration capability of materials under the action of specific microorganisms, the soil landfill test method is used, the landfill time is 90 days, the biodegradation capability of the materials is evaluated by the average percentage (%) of mass change, the higher the value is, the better the biodegradation capability is, and the specific results are shown in Table 1.
TABLE 1 Plastic bag Performance test and biodegradation test results
Through table 1, compared with comparative example 1, examples 1, 2 and 3 added modified montmorillonite, which reduced interfacial tension between the two phases, generated a certain relationship between the two phases, facilitated the combination of PLA phase and PBAT phase, promoted the formation of continuous phase, at which time the compatibility of the composite material was improved, thus improving the properties of the blend. Compared with the comparative example 2, the modified aramid fibers are adopted as the fillers in the examples 1, 2 and 3, and the obtained plastic bags have good strength and good biodegradation rate.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A biodegradable plastic garbage bag is characterized by comprising the following raw materials in parts by weight: 100-120 parts of PLA, 100-120 parts of PBAT, 2-5 parts of filler, 4-8 parts of compatilizer and 1-3 parts of antioxidant; the filler is modified aramid fiber and is obtained by the following method: placing aramid fibers in a silane coupling agent solution, soaking for 30-40min under a shaking condition, and then placing in a drying oven for drying to obtain the modified aramid fibers.
2. The biodegradable plastic garbage bag according to claim 1, wherein said aramid fiber is meta-aramid fiber.
3. The biodegradable plastic garbage bag as claimed in claim 1, wherein the weight ratio of the aramid fiber to the silane coupling agent solution is 1: 10-12.
4. The biodegradable plastic garbage bag according to claim 1, wherein said compatibilizer is modified montmorillonite.
5. The biodegradable plastic garbage bag as set forth in claim 4, wherein said modified montmorillonite is obtained by the steps of: and placing the montmorillonite in a dilute sulfuric acid solution, reacting for 40-60min under an ultrasonic condition, washing, and drying in an oven to obtain the modified montmorillonite.
6. The biodegradable plastic garbage bag as set forth in claim 5, wherein the weight ratio of said montmorillonite to said dilute sulfuric acid solution is 1: 5-6.
7. A biodegradable plastic garbage bag according to claim 5 or 6, characterized in that the mass fraction of sulfuric acid in said dilute sulfuric acid solution is 15-30%.
8. The biodegradable plastic garbage bag as defined in claim 1, wherein said antioxidant is antioxidant 1010 or antioxidant 1076.
9. A method of making a biodegradable plastic garbage bag according to any one of claims 1-8, characterized by comprising the steps of: PLA, PBAT, a filler, a compatilizer and an antioxidant are mixed and then added into a double-screw extruder, composite particles are prepared by melting, extruding, granulating and drying, and the plastic particles are processed into plastic bags by a blow molding machine.
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| CN202111440296.5A CN114369346A (en) | 2021-11-30 | 2021-11-30 | Biodegradable plastic garbage bag and preparation method thereof |
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| CN202111440296.5A CN114369346A (en) | 2021-11-30 | 2021-11-30 | Biodegradable plastic garbage bag and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117384474A (en) * | 2023-10-27 | 2024-01-12 | 佛山安亿纳米材料有限公司 | High-strength composite film and preparation method thereof |
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2021
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Patent Citations (7)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117384474A (en) * | 2023-10-27 | 2024-01-12 | 佛山安亿纳米材料有限公司 | High-strength composite film and preparation method thereof |
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