CN111533960A - Environment-friendly degradable plastic packaging bag - Google Patents
Environment-friendly degradable plastic packaging bag Download PDFInfo
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- CN111533960A CN111533960A CN202010511893.1A CN202010511893A CN111533960A CN 111533960 A CN111533960 A CN 111533960A CN 202010511893 A CN202010511893 A CN 202010511893A CN 111533960 A CN111533960 A CN 111533960A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L5/00—Compositions of polysaccharides or of their derivatives not provided for in groups C08L1/00 or C08L3/00
- C08L5/08—Chitin; Chondroitin sulfate; Hyaluronic acid; Derivatives thereof
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/06—Biodegradable
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
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Abstract
The invention discloses an environment-friendly degradable plastic packaging bag which is prepared from the following raw materials in parts by weight: modified starch: 5-8 parts of a photosensitizer: 4-15 parts of antioxidant: 8-13 parts of chitosan: 30-40 parts of degradable resin: 5-20 parts of a coupling agent: 10-13 parts of ultraviolet absorbent: 1-2 parts, polylactic acid: 5-9 parts of a solvent; the raw materials of the invention are modified starch, photosensitizer, antioxidant, chitosan, degradable resin, coupling agent, ultraviolet absorbent and polylactic acid, and the modified starch and the coupling agent are added, so that the degradation period of the plastic is shortened, and the degradation degree is increased; the added reinforcing fiber and the added degradable resin improve the toughness of the plastic, prolong the service life of the degradable plastic product, and then the chitosan can accelerate the degradation speed and reduce the influence on the surrounding environment.
Description
Technical Field
The invention relates to the technical field of plastic bags, in particular to an environment-friendly degradable plastic packaging bag.
Background
The degradable plastic is a plastic which has various properties meeting the use requirements, has unchanged performance in the preservation period and can be degraded into substances harmless to the environment under the natural environment condition after use. And are therefore also referred to as environmentally degradable plastics. There are a number of new plastics: photodegradable plastics, biodegradable plastics, photo-, oxidation \ all-biodegradable plastics, carbon dioxide-based biodegradable plastics and thermoplastic starch resin degradable plastics, wherein the degradation of the polymer refers to a process of breaking a polymerized macromolecular chain caused by chemical and physical factors. Degradation reduces the molecular weight of the polymer and degrades the physical properties of the polymer material until the polymer material loses its workability, a phenomenon also known as aged degradation of the polymer material. There is a direct relationship between the aging degradation of the polymer and the stability of the polymer. The aging degradation of the polymer shortens the service life of the plastic. For this reason, scientists have been working on the research on the aging prevention, i.e., stabilization, of such materials to produce polymer materials with high stability since the advent of plastics, and scientists in various countries are competing to develop environmentally degradable plastics by using the aging degradation behavior of polymers. The plastic packaging bags are widely applied, but the 'white pollution' brought by waste plastics is more and more serious, the existing degradable plastic bags are most of synthetic pure polymers and have the capability of resisting the microbial corrosion, but additives such as plasticizers, lubricants, pigments and the like reduce the capability, easily cause the environmental pollution and have low reliability, and therefore, the environment-friendly degradable plastic packaging bag is provided.
Disclosure of Invention
The invention aims to provide an environment-friendly degradable plastic packaging bag to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: an environment-friendly degradable plastic packaging bag is prepared from the following raw materials in parts by weight:
modified starch: 5-8 parts of a photosensitizer: 4-15 parts of antioxidant: 8-13 parts of chitosan: 30-40 parts of degradable resin: 5-20 parts of a coupling agent: 10-13 parts of ultraviolet absorbent: 1-2 parts, polylactic acid: 5-9 parts.
As further preferable in the present technical solution: the modified starch is prepared from the following raw materials in parts by weight: sorghum starch: 15-25 parts of corn starch: 13-20 parts of polypropylene granules: 10-17 parts, 35 parts of water, and nano calcium carbonate: 3-8 parts of white mineral oil: 1-2 parts.
As further preferable in the present technical solution: the photosensitizer comprises a catalyst which catalyzes the generation of active oxygen species, the catalyst being any one of a metal catalyst, a biocompatible metal dioxide catalyst, preferably a biocompatible metal dioxide catalyst.
As further preferable in the present technical solution: the antioxidant is composed of a main antioxidant and an auxiliary antioxidant, wherein the main antioxidant is any one of tertiary butyl, methyl phenol, disulfide and pentaerythritol ester, the preferable pentaerythritol ester is selected, and the auxiliary antioxidant is any one of phosphite ester and thiodipropionic acid diester, and the preferable thiodipropionic acid diester.
As further preferable in the present technical solution: the ultraviolet absorbent is any one of phenyl salicylate, benzophenones and benzotriazole, and 5-10 parts of hindered amine light stabilizer is added into the ultraviolet absorbent.
As further preferable in the present technical solution: the degradable resin is prepared from the following raw materials in parts by weight: straw powder: 80-100 parts of high-molecular-weight polylactic acid: 50-100 parts of low-molecular-weight polylactic acid: 20-40 parts of a biodegradation auxiliary agent: 10-30 parts of reinforcing fiber: 8-16 parts of resin material: 10-20 parts.
As further preferable in the present technical solution: the resin material is any one of PP resin, polyethylene resin, polypropylene resin and polyester resin.
As further preferable in the present technical solution: the reinforcing fiber: polyacrylonitrile fiber, glass fiber, aluminum silicate fiber, high silica fiber, mullite fiber or carbon fiber, and corn stalk fiber.
As further preferable in the present technical solution: the chitosan mainly comprises the following components: the shell of Crustacea can be selected from cuticle of insect, elastic wing of butterfly and dried small shrimp, preferably dried small shrimp.
Compared with the prior art, the invention has the beneficial effects that: the raw materials of the invention are modified starch, photosensitizer, antioxidant, chitosan, degradable resin, coupling agent, ultraviolet absorbent and polylactic acid, and the modified starch and the coupling agent are added, so that the degradation period of the plastic is shortened, and the degradation degree is increased; the added reinforcing fiber and the added degradable resin improve the toughness of the plastic, prolong the service life of the degradable plastic product, and then the chitosan can accelerate the degradation speed and reduce the influence on the surrounding environment.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to data in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The invention provides a technical scheme that: an environment-friendly degradable plastic packaging bag is prepared from the following raw materials in parts by weight:
modified starch: 8 parts of photosensitizer: 15 parts of antioxidant: 13 parts of chitosan: 40 parts of degradable resin: 20 parts of coupling agent: 13 parts, ultraviolet absorber: 2 parts, polylactic acid: 9 parts of polylactic acid, which is taken as a raw material and is crushed in soil for 3-6 months, under the action of microbial decomposition enzyme, the polylactic acid is changed into lactic acid for 6-12 months, finally into carbon dioxide and water, and the polylactic acid is changed into lactic acid for 6-12 months, and finally into carbon dioxide and water.
In this embodiment, specifically: the modified starch is prepared from the following raw materials in parts by weight: sorghum starch: 25 parts, corn starch: 20 parts of polypropylene granules: 17 parts, 35 parts of water, and nano calcium carbonate: 8 parts of white mineral oil: and 2 parts.
In this embodiment, specifically: the photosensitizer includes a catalyst that catalyzes the generation of active oxygen in the form of any one of a metal catalyst, a biocompatible metal dioxide catalyst, preferably a biocompatible metal dioxide catalyst, which catalyzes the formation of active oxygen in response to irradiation with light in a wide wavelength range by adding the photosensitizer to gradually decompose the plastic wrap under sunlight.
In this embodiment, specifically: the antioxidant is composed of a main antioxidant and an auxiliary antioxidant, wherein the main antioxidant is any one of tertiary butyl, methyl phenol, disulfide and pentaerythritol ester, preferably pentaerythritol ester, the auxiliary antioxidant is any one of phosphite ester and thiodipropionic acid diester, preferably thiodipropionic acid diester, and the antioxidant is added into a photosensitizer, so that the induction period of the photosensitizer added plastic can be conveniently adjusted, and the requirements of different occasions can be met.
In this embodiment, specifically: the ultraviolet absorbent is any one of phenyl salicylate, benzophenones and benzotriazole, and 5-10 parts of hindered amine light stabilizer is added into the ultraviolet absorbent.
In this embodiment, specifically: the degradable resin is prepared from the following raw materials in parts by weight: straw powder: 80 parts, high molecular weight polylactic acid: 50 parts, low molecular weight polylactic acid: 20 parts of biodegradation additive: 30 parts, reinforcing fiber: 8 parts of resin material: 10 parts.
In this embodiment, specifically: the resin material is any one of PP resin, polyethylene resin, polypropylene resin and polyester resin.
In this embodiment, specifically: the reinforcing fiber: polyacrylonitrile fiber, glass fiber, aluminum silicate fiber, high silica fiber, mullite fiber or carbon fiber, and corn stalk fiber.
In this embodiment, specifically: the chitosan mainly comprises the following components: the shell of Crustacea can be selected from cuticle of insect, elastic wing of butterfly and dried small shrimp, preferably dried small shrimp.
Example 2
The invention provides another technical scheme: an environment-friendly degradable plastic packaging bag is prepared from the following raw materials in parts by weight:
modified starch: 5 parts of photosensitizer: 4 parts of antioxidant: 8 parts of chitosan: 30 parts of degradable resin: 5 parts of coupling agent: 10 parts, ultraviolet absorber: 2 parts, polylactic acid: 9 parts of polylactic acid, which is taken as a raw material and is crushed in soil for 3-6 months, under the action of microbial decomposition enzyme, the polylactic acid is changed into lactic acid for 6-12 months, finally into carbon dioxide and water, and the polylactic acid is changed into lactic acid for 6-12 months, and finally into carbon dioxide and water.
In this embodiment, specifically: the modified starch is prepared from the following raw materials in parts by weight: sorghum starch: 15 parts, corn starch: 20 parts of polypropylene granules: 17 parts, 35 parts of water, and nano calcium carbonate: 3 parts of white mineral oil: and 2 parts.
In this embodiment, specifically: the photosensitizer includes a catalyst that catalyzes the generation of active oxygen in the form of any one of a metal catalyst, a biocompatible metal dioxide catalyst, preferably a biocompatible metal dioxide catalyst, which catalyzes the formation of active oxygen in response to irradiation with light in a wide wavelength range by adding the photosensitizer to gradually decompose the plastic wrap under sunlight.
In this embodiment, specifically: the antioxidant is composed of a main antioxidant and an auxiliary antioxidant, wherein the main antioxidant is any one of tertiary butyl, methyl phenol, disulfide and pentaerythritol ester, preferably pentaerythritol ester, the auxiliary antioxidant is any one of phosphite ester and thiodipropionic acid diester, preferably thiodipropionic acid diester, and the antioxidant is added into a photosensitizer, so that the induction period of the photosensitizer added plastic can be conveniently adjusted, and the requirements of different occasions can be met.
In this embodiment, specifically: the ultraviolet absorbent is any one of phenyl salicylate, benzophenones and benzotriazole, and 5 parts of hindered amine light stabilizer is added into the ultraviolet absorbent.
In this embodiment, specifically: the degradable resin is prepared from the following raw materials in parts by weight: straw powder: 80 parts, high molecular weight polylactic acid: 50 parts, low molecular weight polylactic acid: 20 parts of biodegradation additive: 10 parts, reinforcing fiber: 8 parts of resin material: 10 parts.
In this embodiment, specifically: the resin material is any one of PP resin, polyethylene resin, polypropylene resin and polyester resin.
In this embodiment, specifically: the reinforcing fiber: polyacrylonitrile fiber, glass fiber, aluminum silicate fiber, high silica fiber, mullite fiber or carbon fiber, and corn stalk fiber.
In this embodiment, specifically: the chitosan mainly comprises the following components: the shell of Crustacea can be selected from cuticle of insect, elastic wing of butterfly and dried small shrimp, preferably dried small shrimp.
Example 3
The invention also provides a technical scheme that: an environment-friendly degradable plastic packaging bag is prepared from the following raw materials in parts by weight:
modified starch: 6 parts of a photosensitizer: 13 parts of antioxidant: 8 parts of chitosan: 35 parts of degradable resin: 15 parts of coupling agent: 10 parts, ultraviolet absorber: 1 part, polylactic acid: 9 parts of polylactic acid, which is taken as a raw material and is crushed in soil for 3-6 months, under the action of microbial decomposition enzyme, the polylactic acid is changed into lactic acid for 6-12 months, finally into carbon dioxide and water, and the polylactic acid is changed into lactic acid for 6-12 months, and finally into carbon dioxide and water.
In this embodiment, specifically: the modified starch is prepared from the following raw materials in parts by weight: sorghum starch: 15 parts, corn starch: 20 parts of polypropylene granules: 17 parts, 35 parts of water, and nano calcium carbonate: 3 parts of white mineral oil: and 2 parts.
In this embodiment, specifically: the photosensitizer includes a catalyst that catalyzes the generation of active oxygen in the form of any one of a metal catalyst, a biocompatible metal dioxide catalyst, preferably a biocompatible metal dioxide catalyst, which catalyzes the formation of active oxygen in response to irradiation with light in a wide wavelength range by adding the photosensitizer to gradually decompose the plastic wrap under sunlight.
In this embodiment, specifically: the antioxidant is composed of a main antioxidant and an auxiliary antioxidant, wherein the main antioxidant is any one of tertiary butyl, methyl phenol, disulfide and pentaerythritol ester, preferably pentaerythritol ester, the auxiliary antioxidant is any one of phosphite ester and thiodipropionic acid diester, preferably thiodipropionic acid diester, and the antioxidant is added into a photosensitizer, so that the induction period of the photosensitizer added plastic can be conveniently adjusted, and the requirements of different occasions can be met.
In this embodiment, specifically: the ultraviolet absorbent is any one of phenyl salicylate, benzophenones and benzotriazole, and 5-10 parts of hindered amine light stabilizer is added into the ultraviolet absorbent.
In this embodiment, specifically: the degradable resin is prepared from the following raw materials in parts by weight: straw powder: 85 parts, high molecular weight polylactic acid: 50 parts, low molecular weight polylactic acid: 20 parts of biodegradation additive: 20 parts, reinforcing fiber: 8 parts of resin material: 10 parts.
In this embodiment, specifically: the resin material is any one of PP resin, polyethylene resin, polypropylene resin and polyester resin.
In this embodiment, specifically: the reinforcing fiber: polyacrylonitrile fiber, glass fiber, aluminum silicate fiber, high silica fiber, mullite fiber or carbon fiber, and corn stalk fiber.
In this embodiment, specifically: the chitosan mainly comprises the following components: the shell of Crustacea can be selected from cuticle of insect, elastic wing of butterfly and dried small shrimp, preferably dried small shrimp.
When the modified starch/coupling agent composite material is used, the raw materials comprise modified starch, a photosensitizer, an antioxidant, chitosan, degradable resin, a coupling agent, an ultraviolet absorbent and polylactic acid, and the degradation period of plastics is shortened and the degradation degree is increased by adding the modified starch and the coupling agent; the added reinforcing fiber and the added degradable resin improve the toughness of the plastic, prolong the service life of the degradable plastic product, and then the chitosan can accelerate the degradation speed and reduce the influence on the surrounding environment.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The environment-friendly degradable plastic packaging bag is characterized by comprising the following raw materials in parts by weight:
modified starch: 5-8 parts of a photosensitizer: 4-15 parts of antioxidant: 8-13 parts of chitosan: 30-40 parts of degradable resin: 5-20 parts of a coupling agent: 10-13 parts of ultraviolet absorbent: 1-2 parts, polylactic acid: 5-9 parts.
2. The environment-friendly degradable plastic packaging bag according to claim 1, wherein: the modified starch is prepared from the following raw materials in parts by weight: sorghum starch: 15-25 parts of corn starch: 13-20 parts of polypropylene granules: 10-17 parts, 35 parts of water, and nano calcium carbonate: 3-8 parts of white mineral oil: 1-2 parts.
3. The environment-friendly degradable plastic packaging bag according to claim 1, wherein: the photosensitizer comprises a catalyst which catalyzes the generation of active oxygen species, the catalyst being any one of a metal catalyst, a biocompatible metal dioxide catalyst, preferably a biocompatible metal dioxide catalyst.
4. The environment-friendly degradable plastic packaging bag according to claim 1, wherein: the antioxidant is composed of a main antioxidant and an auxiliary antioxidant, wherein the main antioxidant is any one of tertiary butyl, methyl phenol, disulfide and pentaerythritol ester, the preferable pentaerythritol ester is selected, and the auxiliary antioxidant is any one of phosphite ester and thiodipropionic acid diester, and the preferable thiodipropionic acid diester.
5. The environment-friendly degradable plastic packaging bag according to claim 1, wherein: the ultraviolet absorbent is any one of phenyl salicylate, benzophenones and benzotriazole, and 5-10 parts of hindered amine light stabilizer is added into the ultraviolet absorbent.
6. The environment-friendly degradable plastic packaging bag according to claim 1, wherein: the degradable resin is prepared from the following raw materials in parts by weight: straw powder: 80-100 parts of high-molecular-weight polylactic acid: 50-100 parts of low-molecular-weight polylactic acid: 20-40 parts of a biodegradation auxiliary agent: 10-30 parts of reinforcing fiber: 8-16 parts of resin material: 10-20 parts.
7. The environment-friendly degradable plastic packaging bag of claim 6, wherein: the resin material is any one of PP resin, polyethylene resin, polypropylene resin and polyester resin.
8. The environment-friendly degradable plastic packaging bag of claim 6, wherein: the reinforcing fiber: polyacrylonitrile fiber, glass fiber, aluminum silicate fiber, high silica fiber, mullite fiber or carbon fiber, and corn stalk fiber.
9. The environment-friendly degradable plastic packaging bag according to claim 1, wherein: the chitosan mainly comprises the following components: the shell of Crustacea can be selected from cuticle of insect, elastic wing of butterfly and dried small shrimp, preferably dried small shrimp.
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| CN202010511893.1A CN111533960A (en) | 2020-06-08 | 2020-06-08 | Environment-friendly degradable plastic packaging bag |
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Cited By (3)
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| CN112646231A (en) * | 2020-12-28 | 2021-04-13 | 惠州市冠展实业有限公司 | Photooxidation biodegradation modifier |
| CN112721359A (en) * | 2020-12-28 | 2021-04-30 | 黄山源点新材料科技有限公司 | Novel winding film and processing technology thereof |
| CN113563702A (en) * | 2021-07-16 | 2021-10-29 | 深圳市正旺环保新材料有限公司 | Degradable plastic bag and preparation method thereof |
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