CN113201228A - Biodegradable material and preparation method thereof - Google Patents
Biodegradable material and preparation method thereof Download PDFInfo
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- CN113201228A CN113201228A CN202110629336.4A CN202110629336A CN113201228A CN 113201228 A CN113201228 A CN 113201228A CN 202110629336 A CN202110629336 A CN 202110629336A CN 113201228 A CN113201228 A CN 113201228A
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The invention belongs to the technical field of degradable materials, in particular to a biodegradable material and a preparation method thereof, and provides the following scheme aiming at the problems of high cost and complex preparation method of the existing degradable material, wherein the biodegradable material comprises the following important components: 40-50 parts of plant straw component, 6-8 parts of modified starch, 3-6 parts of degradable plastic resin, 3-6 parts of polystyrene, 2-4 parts of polyglycolic acid, 1.2-2.4 parts of toughening agent, 3-6 parts of hydrophobic auxiliary agent, 2-5 parts of liquid thickening agent, 0.3-0.6 part of antioxidant and 0.3-0.6 part of preservative, wherein the straw component comprises corn straw powder, wheat straw powder, rice straw powder and soybean straw powder, and the mass ratio of the corn straw powder, the wheat straw powder, the rice straw powder and the soybean straw powder is 1:1: 1. The invention is prepared by using waste plant straw components, can reduce the cost and has the function of environmental protection; the preparation method is simple.
Description
Technical Field
The invention relates to the technical field of degradable materials, in particular to a biodegradable material and a preparation method thereof.
Background
A degradable material is a material that is degradable over a period of time in both thermodynamic and kinetic terms. The material can be classified into photodegradable materials, biodegradable materials and the like according to external factors of degradation, and the influencing factors mainly comprise temperature, molecular weight, material structure and the like. On the premise of environmental protection, degradable materials are very important.
The existing degradable material has higher cost and complex preparation method.
Disclosure of Invention
The invention aims to solve the defects of high cost and complex preparation method of the existing degradable material, and provides a biodegradable material and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
a biodegradable material comprising the following essential components: 40-50 parts of plant straw component, 6-8 parts of modified starch, 3-6 parts of degradable plastic resin, 3-6 parts of polystyrene, 2-4 parts of polyglycolic acid, 1.2-2.4 parts of toughening agent, 3-6 parts of hydrophobic auxiliary agent, 2-5 parts of liquid thickening agent, 0.3-0.6 part of antioxidant and 0.3-0.6 part of preservative, wherein the straw component comprises corn straw powder, wheat straw powder, rice straw powder and soybean straw powder, and the mass ratio of the corn straw powder, the wheat straw powder, the rice straw powder and the soybean straw powder is 1:1: 1.
Preferably, the plant straw component comprises 46-48 parts of plant straw, 6.5-7.5 parts of modified starch, 4-5 parts of degradable plastic resin, 4-5 parts of polystyrene, 2.5-3.5 parts of polyglycolic acid, 1.8-2.0 parts of toughening agent, 4-5 parts of hydrophobic auxiliary agent, 3-4 parts of liquid thickening agent, 0.4-0.5 part of antioxidant and 0.4-0.5 part of preservative.
Preferably, the plant straw component comprises 47 parts of plant straw, 7 parts of modified starch, 4.5 parts of degradable plastic resin, 4.5 parts of polystyrene, 3 parts of polyglycolic acid, 1.9 parts of toughening agent, 4.5 parts of hydrophobic auxiliary agent, 3.5 parts of liquid thickening agent, 0.45 part of antioxidant and 0.45 part of preservative.
The invention also provides a preparation method of the biodegradable material, which comprises the following steps:
s1: processing and weighing plant straw components;
s2: firstly, mixing plant straw components with a hydrophobic auxiliary agent;
s3: mixing the raw materials;
s4: and (3) mixing materials, melting and extruding.
Preferably, in S1, the corn straw, the wheat straw, the rice straw and the soybean straw powder are cleaned, dried, crushed, screened uniformly by using a screen, and weighed in a suitable weight.
Preferably, the plant straw components are added into a mixer in S2, then the water repellent agent is added and fully mixed, the temperature of the mixer is set to be 90-110 ℃, the rotating speed is 400-600r/min, and the mixing time is 10-20 min.
Preferably, the raw material mixing in S3 includes the following steps:
firstly, adding all the other raw materials into a mixer, setting the temperature of the mixer to be 80-100 ℃, the rotating speed to be 200-;
secondly, reducing the temperature of the mixer to 60-65 ℃, and mixing the materials for 5-10min to obtain a mixture;
thirdly, guiding out and cooling the mixture.
Preferably, in S4, the mixture is screened by using a 100-mesh screen and then introduced into a twin-screw injection granulator for processing, so as to obtain the degradable granular material.
Preferably, the multiple zones of the twin-screw injection granulator are set at a temperature of 140 ℃ in the first zone, 175 ℃ in the second zone, 175 ℃ in the third zone, 175 ℃ in the fourth zone, 160 ℃ in the fifth zone, 160 ℃ in the sixth zone, 150 ℃ in the seventh zone, 150 ℃ in the eighth zone, 150 ℃ in the ninth zone, and 175 ℃ in the die.
Preferably, the mixture enters a double-screw injection granulator and is melted and added in a plurality of intervals, and then is extruded, cooled and cut into granules, wherein the rotating speed of a main machine is 290-300r/min, the feeding rotating speed is 35-45r/min, the vacuum degree is less than-0.06 MPa, and the rotating speed of the extrusion granulator is 90-110 HZ/min.
Compared with the prior art, the invention has the advantages that:
the invention is prepared by using waste plant straw components, can reduce the cost and has the function of environmental protection; the preparation method is simple and reduces the cost.
Drawings
Fig. 1 is a schematic structural diagram of a preparation method of a biodegradable material provided by the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings 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 of the embodiments.
Example one
Referring to fig. 1, a biodegradable material comprises the following important components: the composite material comprises 40 parts of plant straw components, 6 parts of modified starch, 3 parts of degradable plastic resin, 3 parts of polystyrene, 2 parts of polyglycolic acid, 1.2 parts of toughening agent, 3 parts of hydrophobic auxiliary agent, 2 parts of liquid thickening agent, 0.3 part of antioxidant and 0.3 part of preservative, wherein the straw components comprise corn straw powder, wheat straw powder, rice straw powder and soybean straw powder, and the mass ratio of the corn straw powder, the wheat straw powder, the rice straw powder and the soybean straw powder is 1:1:1: 1.
The invention also provides a preparation method of the biodegradable material, which comprises the following steps:
s1: processing and weighing plant straw components;
s2: firstly, mixing plant straw components with a hydrophobic auxiliary agent;
s3: mixing the raw materials;
s4: and (3) mixing materials, melting and extruding.
In this embodiment, in S1, corn straw, wheat straw, rice straw, and soybean straw powder are washed, dried, and then pulverized, and then uniformly screened with a screen, and then weighed to a suitable weight.
In the embodiment, the plant straw components are added into a mixer in S2, then the water repellent agent is added and fully mixed, the temperature of the mixer is set to be 90-110 ℃, the rotating speed is 400r/min, and the mixing time is 10 min.
In this embodiment, the mixing of the raw materials in S3 includes the following steps:
firstly, adding all the other raw materials into a mixer, setting the temperature of the mixer to be 80-100 ℃, the rotating speed to be 200r/min and the mixing time to be 15 min;
secondly, reducing the temperature of the mixer to 60-65 ℃, and mixing the materials for 5min to obtain a mixture;
thirdly, guiding out and cooling the mixture.
In this example, in S4, the mixture was screened with a 100-mesh screen and then introduced into a twin-screw injection granulator to be processed, so as to obtain a degradable particulate material.
In this example, the temperatures of the twin-screw injection pelletizer in the plural zones were set to 140 ℃ in the first zone, 175 ℃ in the second zone, 175 ℃ in the third zone, 175 ℃ in the fourth zone, 160 ℃ in the fifth zone, 160 ℃ in the sixth zone, 150 ℃ in the seventh zone, 150 ℃ in the eighth zone, 150 ℃ in the ninth zone, and 175 ℃ in the die.
In the embodiment, the mixture enters a double-screw injection granulator and is melted and added in a plurality of intervals, and then is extruded, cooled and cut into granules, wherein the rotating speed of a main machine is 290r/min, the feeding rotating speed is 35r/min, the vacuum degree is less than-0.06 MPa, and the rotating speed of an extrusion granulator is 90 HZ/min.
Example two
Referring to fig. 1, a biodegradable material comprises the following important components: 47 parts of plant straw component, 7 parts of modified starch, 4.5 parts of degradable plastic resin, 4.5 parts of polystyrene, 3 parts of polyglycolic acid, 1.9 parts of toughening agent, 4.5 parts of hydrophobic auxiliary agent, 3.5 parts of liquid thickening agent, 0.45 part of antioxidant and 0.45 part of preservative, wherein the straw component comprises corn straw powder, wheat straw powder, rice straw powder and soybean straw powder, and the mass ratio of the corn straw powder, the wheat straw powder, the rice straw powder and the soybean straw powder is 1:1: 1.
The invention also provides a preparation method of the biodegradable material, which comprises the following steps:
s1: processing and weighing plant straw components;
s2: firstly, mixing plant straw components with a hydrophobic auxiliary agent;
s3: mixing the raw materials;
s4: and (3) mixing materials, melting and extruding.
In this embodiment, in S1, corn straw, wheat straw, rice straw, and soybean straw powder are washed, dried, and then pulverized, and then uniformly screened with a screen, and then weighed to a suitable weight.
In the embodiment, the plant straw components are added into a mixer in S2, then the water repellent agent is added and fully mixed, the temperature of the mixer is set to be 90-110 ℃, the rotating speed is 500r/min, and the mixing time is 15 min.
In this embodiment, the mixing of the raw materials in S3 includes the following steps:
firstly, adding all the other raw materials into a mixer, setting the temperature of the mixer to be 80-100 ℃, the rotating speed to be 300r/min and the mixing time to be 25 min;
secondly, reducing the temperature of the mixer to 60-65 ℃, and mixing for 8min to obtain a mixture;
thirdly, guiding out and cooling the mixture.
In this example, in S4, the mixture was screened with a 100-mesh screen and then introduced into a twin-screw injection granulator to be processed, so as to obtain a degradable particulate material.
In this example, the temperatures of the twin-screw injection pelletizer in the plural zones were set to 140 ℃ in the first zone, 175 ℃ in the second zone, 175 ℃ in the third zone, 175 ℃ in the fourth zone, 160 ℃ in the fifth zone, 160 ℃ in the sixth zone, 150 ℃ in the seventh zone, 150 ℃ in the eighth zone, 150 ℃ in the ninth zone, and 175 ℃ in the die.
In the embodiment, the mixture enters a double-screw injection granulator and is melted and added in a plurality of intervals, and then is extruded, cooled and cut into granules, wherein the rotating speed of a main machine is 295r/min, the feeding rotating speed is 40r/min, the vacuum degree is less than-0.06 MPa, and the rotating speed of an extrusion granulator is 100 HZ/min.
EXAMPLE III
Referring to fig. 1, a biodegradable material comprises the following important components: 50 parts of plant straw component, 8 parts of modified starch, 6 parts of degradable plastic resin, 6 parts of polystyrene, 4 parts of polyglycolic acid, 2.4 parts of toughening agent, 6 parts of hydrophobic auxiliary agent, 5 parts of liquid thickening agent, 0.6 part of antioxidant and 0.6 part of preservative, wherein the straw component comprises corn straw powder, wheat straw powder, rice straw powder and soybean straw powder, and the mass ratio of the corn straw powder to the wheat straw powder to the rice straw powder to the soybean straw powder is 1:1:1: 1.
The invention also provides a preparation method of the biodegradable material, which comprises the following steps:
s1: processing and weighing plant straw components;
s2: firstly, mixing plant straw components with a hydrophobic auxiliary agent;
s3: mixing the raw materials;
s4: and (3) mixing materials, melting and extruding.
In this embodiment, in S1, corn straw, wheat straw, rice straw, and soybean straw powder are washed, dried, and then pulverized, and then uniformly screened with a screen, and then weighed to a suitable weight.
In the embodiment, the plant straw components are added into a mixer in S2, then the water repellent agent is added and fully mixed, the temperature of the mixer is set to be 90-110 ℃, the rotating speed is 600r/min, and the mixing time is 20 min.
In this embodiment, the mixing of the raw materials in S3 includes the following steps:
firstly, adding all the other raw materials into a mixer, setting the temperature of the mixer to be 80-100 ℃, the rotating speed to be 400r/min and the mixing time to be 30 min;
secondly, reducing the temperature of the mixer to 60-65 ℃, and mixing the materials for 10min to obtain a mixture;
thirdly, guiding out and cooling the mixture.
In this example, in S4, the mixture was screened with a 100-mesh screen and then introduced into a twin-screw injection granulator to be processed, so as to obtain a degradable particulate material.
In this example, the temperatures of the twin-screw injection pelletizer in the plural zones were set to 140 ℃ in the first zone, 175 ℃ in the second zone, 175 ℃ in the third zone, 175 ℃ in the fourth zone, 160 ℃ in the fifth zone, 160 ℃ in the sixth zone, 150 ℃ in the seventh zone, 150 ℃ in the eighth zone, 150 ℃ in the ninth zone, and 175 ℃ in the die.
In the embodiment, the mixture enters a double-screw injection granulator and is melted and added in a plurality of intervals, and then is extruded, cooled and cut into granules, wherein the rotating speed of a main machine is 300r/min, the feeding rotating speed is 45r/min, the vacuum degree is less than-0.06 MPa, and the rotating speed of an extrusion granulator is 110 HZ/min.
Example four
A biodegradable material comprising the following essential components: 60kg of degradable plastic resin PBAT, 10kg of degradable plastic resin PLA, 30kg of modified starch TPS, 1kg of chain extender, 0.2kg of antioxidant, 2kg of phase solvent and 0.1kg of uvioresistant agent.
The invention also provides a preparation method of the biodegradable material, which comprises the following steps:
s1: firstly, drying raw materials;
s2: firstly, mixing a degradable plastic resin PBAT, a degradable plastic resin PLA and a modified starch TPS, and then adding a chain extender, an antioxidant, a phase solvent and an anti-ultraviolet agent for mixing;
s3: and (3) mixing materials, melting and extruding.
In this example, the raw material was dried in a drying oven at 80 ℃ for 2 to 4H in S1.
In the embodiment, in the step S2, the degradable plastic resin PBAT, the degradable plastic resin PLA and the modified starch TPS are added into a mixer, then the chain extender, the antioxidant, the phase solvent and the anti-ultraviolet agent are added and mixed, the temperature of the mixer is set to 90 ℃, the rotation speed is set to 600r/min, and the mixing time is set to 20 min.
In this example, in S3, the mixture was screened with a 100-mesh screen and then introduced into a twin-screw injection granulator to be processed, so as to obtain a degradable particulate material.
In this example, the temperatures of the twin-screw injection pelletizer in the plural zones were set to 140 ℃ in the first zone, 175 ℃ in the second zone, 175 ℃ in the third zone, 175 ℃ in the fourth zone, 160 ℃ in the fifth zone, 160 ℃ in the sixth zone, 150 ℃ in the seventh zone, 150 ℃ in the eighth zone, 150 ℃ in the ninth zone, and 175 ℃ in the die.
In the embodiment, the mixture enters a double-screw injection granulator and is melted and added in a plurality of intervals, and then is extruded, cooled and cut into granules, wherein the rotating speed of a main machine is 300r/min, the feeding rotating speed is 45r/min, the vacuum degree is less than-0.06 MPa, and the rotating speed of an extrusion granulator is 110 HZ/min.
EXAMPLE five
The resulting material particles were subjected to performance testing to obtain the following data:
the above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. A biodegradable material, characterized in that it comprises the following essential components: 40-50 parts of plant straw component, 6-8 parts of modified starch, 3-6 parts of degradable plastic resin, 3-6 parts of polystyrene, 2-4 parts of polyglycolic acid, 1.2-2.4 parts of toughening agent, 3-6 parts of hydrophobic auxiliary agent, 2-5 parts of liquid thickening agent, 0.3-0.6 part of antioxidant and 0.3-0.6 part of preservative, wherein the straw component comprises corn straw powder, wheat straw powder, rice straw powder and soybean straw powder, and the mass ratio of the corn straw powder, the wheat straw powder, the rice straw powder and the soybean straw powder is 1:1: 1.
2. The biodegradable material according to claim 1, wherein the plant straw component comprises 46-48 parts of modified starch 6.5-7.5 parts, 4-5 parts of degradable plastic resin, 4-5 parts of polystyrene, 2.5-3.5 parts of polyglycolic acid, 1.8-2.0 parts of toughening agent, 4-5 parts of hydrophobic auxiliary agent, 3-4 parts of liquid thickening agent, 0.4-0.5 part of antioxidant and 0.4-0.5 part of preservative.
3. The biodegradable material according to claim 1, wherein the plant straw component comprises 47 parts of plant straw, 7 parts of modified starch, 4.5 parts of degradable plastic resin, 4.5 parts of polystyrene, 3 parts of polyglycolic acid, 1.9 parts of toughening agent, 4.5 parts of hydrophobic auxiliary agent, 3.5 parts of liquid thickening agent, 0.45 part of antioxidant and 0.45 part of preservative.
4. A method for preparing a biodegradable material, according to claim 1, comprising the following steps:
s1: processing and weighing plant straw components;
s2: firstly, mixing plant straw components with a hydrophobic auxiliary agent;
s3: mixing the raw materials;
s4: and (3) mixing materials, melting and extruding.
5. The method of claim 4, wherein in the step S1, the corn straw, the wheat straw, the rice straw and the soybean straw powder are washed, dried, crushed, screened uniformly by using a screen, and weighed to a suitable weight.
6. The method as claimed in claim 4, wherein the step S2 is to add the plant straw component into the mixer, add the hydrophobic agent and mix thoroughly, and set the mixer temperature at 90-110 ℃, the rotation speed at 400-600r/min, and the mixing time at 10-20 min.
7. The method for preparing biodegradable material according to claim 4, wherein said step of mixing raw materials in S3 comprises the following steps:
firstly, adding all the other raw materials into a mixer, setting the temperature of the mixer to be 80-100 ℃, the rotating speed to be 200-;
reducing the temperature of the mixer to 60-65 ℃, and mixing the materials for 5-10min to obtain a mixture;
and (5) guiding out and cooling the mixture.
8. The method of claim 4, wherein in step S4, the mixture is screened with a 100-mesh screen and then processed in a twin-screw injection granulator to obtain the degradable granular material.
9. The method for preparing biodegradable material according to claim 8, wherein the temperatures of the multiple zones of the twin-screw injection granulator are set to 140 ℃ for the first zone, 175 ℃ for the second zone, 175 ℃ for the third zone, 175 ℃ for the fourth zone, 160 ℃ for the fifth zone, 160 ℃ for the sixth zone, 150 ℃ for the seventh zone, 150 ℃ for the eighth zone, 150 ℃ for the ninth zone, and 175 ℃ for the touch.
10. The method for preparing biodegradable material according to claim 9, wherein the mixture is melted and added in a twin-screw injection pelletizer through multiple zones, and then extruded, cooled, cut into pellets, wherein the rotation speed of the main machine is 290-300r/min, the feeding rotation speed is 35-45r/min, the vacuum degree is less than-0.06 Mpa, and the rotation speed of the extrusion pelletizer is 90-110 HZ/min.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113831748A (en) * | 2021-09-26 | 2021-12-24 | 南京五瑞生物降解新材料研究院有限公司 | Biomass fully-degradable material and preparation process thereof |
| CN114835955A (en) * | 2022-03-27 | 2022-08-02 | 上海比杰科技有限公司 | Method for preparing biodegradable material |
| CN115260668A (en) * | 2022-09-02 | 2022-11-01 | 深圳市鼎力盛科技有限公司 | Novel material for breakage-proof packaging bag and preparation method thereof |
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| CN106751985A (en) * | 2016-11-29 | 2017-05-31 | 安庆市鼎升环保科技有限公司 | A kind of environment protecting plant stalk fibre composite plant cover blanket of easy bonding |
| CN111500029A (en) * | 2020-05-08 | 2020-08-07 | 深圳国至新材料科技有限公司 | Bio-based degradable knife and fork material and preparation method thereof |
| CN112694766A (en) * | 2020-12-24 | 2021-04-23 | 苏州市和好塑业有限公司 | Preparation method of biodegradable plastic and application of biodegradable plastic in packing lunch boxes |
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| CN106751985A (en) * | 2016-11-29 | 2017-05-31 | 安庆市鼎升环保科技有限公司 | A kind of environment protecting plant stalk fibre composite plant cover blanket of easy bonding |
| CN111500029A (en) * | 2020-05-08 | 2020-08-07 | 深圳国至新材料科技有限公司 | Bio-based degradable knife and fork material and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113831748A (en) * | 2021-09-26 | 2021-12-24 | 南京五瑞生物降解新材料研究院有限公司 | Biomass fully-degradable material and preparation process thereof |
| CN114835955A (en) * | 2022-03-27 | 2022-08-02 | 上海比杰科技有限公司 | Method for preparing biodegradable material |
| CN115260668A (en) * | 2022-09-02 | 2022-11-01 | 深圳市鼎力盛科技有限公司 | Novel material for breakage-proof packaging bag and preparation method thereof |
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