CN113980445A - Special biomass color master batch for degradable plastics and preparation method thereof - Google Patents
Special biomass color master batch for degradable plastics and preparation method thereof Download PDFInfo
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- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
- C08J3/226—Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
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- C08J2405/16—Cyclodextrin; Derivatives thereof
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- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
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Abstract
The invention relates to the technical field of plastics, and discloses a biomass color master batch special for degradable plastics and a preparation method thereof, wherein the biomass color master batch is prepared from the following components: plant coloring agent, cyclodextrin, flame retardant, modified polylactic acid, plasticizer, ultraviolet absorbent, anti-aging agent, inorganic filler and sodium stearate; according to the invention, polylactic acid is modified, the obtained modified polylactic acid is matched with other components, and the prepared color master batch is introduced into the degradable plastic, so that the comprehensive performance of the degradable plastic can be greatly improved, particularly the tensile strength and the flame retardant property are obviously improved, and meanwhile, the degradation performance of the degradable plastic is not influenced.
Description
Technical Field
The invention relates to the technical field of plastics, in particular to a biomass color master batch special for degradable plastics.
Background
Plastics are a material commonly used in daily life, and are widely used in daily life due to low manufacturing cost, but because of the characteristics of the plastics, the plastics are discarded as garbage after not being used, and cannot be naturally degraded and returned to the nature for a long time, so that the plastics cause serious harm to the nature.
With the increasing improvement of living standard of people, the quality of life is greatly improved, health becomes the topic of the current relation of people, and the pursuit of green products and green consumption becomes an important demand.
The conventional color master batch adopted by the color master batch still has poor biodegradability when being processed by the existing degradable plastic, and the degradation performance of the degradable plastic can be influenced after the color master batch is added into the degradable plastic for use.
Based on the above, a biomass color masterbatch special for degrading plastics is provided, and hopefully, the defects in the prior art are overcome.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a special biomass color master batch for degradable plastics.
In order to achieve the purpose, the invention provides the following technical scheme:
a biomass color master batch special for degradable plastics is prepared from the following components in parts by weight: 22-26 parts of plant coloring agent, 20-25 parts of cyclodextrin, 1-3 parts of flame retardant, 35-40 parts of modified polylactic acid, 1-3 parts of plasticizer, 1-2 parts of ultraviolet absorbent, 1.2-1.6 parts of anti-aging agent, 5-7 parts of inorganic filler and 0.2-0.5 part of sodium stearate.
As a further technical scheme: the preparation method of the modified polylactic resin comprises the following steps:
(1) adding polylactic acid into dimethylbenzene, adjusting the temperature value to 70 ℃, and stirring for 30min under heat preservation to obtain a homogeneous solution;
(2) adding a polyaspartic acid solution into the homogeneous phase solution obtained in the step (1), adjusting the temperature value to 50 ℃, and stirring for 40min under heat preservation to obtain an intermediate solution;
(3) adding glycerol into the intermediate solution obtained in the step (2), and stirring at the rotating speed of 3000r/min for 40min to obtain an emulsion;
(4) and (4) carrying out freezing phase separation on the emulsion obtained in the step (3), and washing and separating after the polylactic acid is solidified into microspheres to obtain the modified polylactic acid.
According to a further technical scheme, the mixing mass ratio of the polylactic acid to the dimethylbenzene is 1: 12.
As a further technical scheme, the mixing mass ratio of the homogeneous solution to the polyaspartic acid solution is 5: 1;
the mass fraction of the polyaspartic acid solution is 10 percent;
the mixing mass ratio of the intermediate solution to the glycerol is 5: 2.
As a further technical scheme: the plant coloring agent is one or more of flos Sophorae Immaturus extract, lignum sappan extract, radix Arnebiae extract, folium Ilicis Purpureae extract, Carthami flos extract, fructus Querci Acutissimae extract, folium Sapii extract, pericarpium Granati extract, folium Nelumbinis extract, maple leaf extract, Aloe extract, and chestnut shell extract.
As a further technical scheme: the flame retardant is magnesium hydroxide.
As a further technical scheme, the plasticizer is epoxidized soybean oil.
As a further technical scheme, the ultraviolet absorbent is phenyl ortho-hydroxybenzoate.
As a further technical scheme, the anti-aging agent is: n-phenyl-alpha-aniline;
the inorganic filler is diatomite.
A preparation method of biomass color masterbatch special for degradable plastics comprises the following steps:
(1) weighing the following components in parts by weight: plant coloring agent, cyclodextrin, flame retardant, modified polylactic acid, plasticizer, ultraviolet absorbent, anti-aging agent, inorganic filler and sodium stearate;
(2) adding the raw materials into a mixer for mixing treatment, and stirring at the rotating speed of 500r/min for 40min to obtain a mixed initial material;
(3) adding the obtained mixed primary material into a dryer, and drying at 60 ℃ for 2 hours to obtain a dried material;
(4) adding the obtained dry material into a double-screw extruder for melt extrusion granulation to obtain color master batches;
wherein the extrusion temperature of the double-screw extruder is 200 ℃.
The plant coloring agent is also called plant dye, and refers to dye which is obtained by extracting pigment from flowers, grasses, trees, stems, leaves, fruits, seeds, peels and roots in the nature to be used as fabric. The plant dyeing agent is non-toxic and harmless, does not cause harm to human health, and meanwhile, the plant dyeing components selected in the invention also have insect prevention and antibacterial effects which are not possessed by chemical dyes.
Cyclodextrin (CD) is a general name of a series of cyclic oligosaccharides produced by amylose under the action of Cyclodextrin glucosyltransferase produced by bacillus, and generally contains 6-12D-glucopyranose units. Among them, the more studied and of great practical importance are molecules containing 6, 7, 8 glucose units, called alpha-, beta-and gama-cyclodextrins, respectively. Based on the results of X-ray crystallography, infrared spectroscopy and NMR spectroscopy, each D (+) -glucopyranose constituting the cyclodextrin molecule is determined to be in a chair conformation. Each glucose unit is bonded to form a ring by a 1, 4-glycosidic bond. Cyclodextrins are not cylindrical molecules but rather slightly conical rings, since the glycosidic bond linking the glucose units cannot rotate freely. According to the invention, the unique molecular structure of cyclodextrin is utilized and introduced into the preparation of biomass color master batch, so that the adsorption performance of the color master batch on a plant coloring agent can be effectively improved, the bearing capacity on the plant coloring agent is enhanced, and the coloring effect of the color master batch is improved.
According to the invention, polylactic acid is modified, the obtained modified polylactic acid is matched with other components, and the prepared color master batch is introduced into the degradable plastic, so that the comprehensive performance of the degradable plastic can be greatly improved, particularly the tensile strength and the flame retardant property are obviously improved, and meanwhile, the degradation performance of the degradable plastic is not influenced.
Compared with the prior art, the invention provides the biomass color master batch special for the degradable plastic, which has the following beneficial effects:
according to the invention, polylactic acid is modified, the obtained modified polylactic acid is matched with other components, and the prepared color master batch is introduced into the degradable plastic, so that the comprehensive performance of the degradable plastic can be greatly improved, particularly the tensile strength and the flame retardant property are obviously improved, and meanwhile, the degradation performance of the degradable plastic is not influenced.
Drawings
FIG. 1 is a graph comparing the effect of added parts by weight of modified starch on tensile strength.
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. 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
A biomass color master batch special for degradable plastics is prepared from the following components in parts by weight: 22 parts of plant coloring agent, 20 parts of cyclodextrin, 1 part of flame retardant, 35 parts of modified polylactic acid, 1 part of plasticizer, 1 part of ultraviolet absorbent, 1.2 parts of anti-aging agent, 5 parts of inorganic filler and 0.2 part of sodium stearate.
The preparation method of the modified polylactic resin comprises the following steps:
(1) adding polylactic acid into dimethylbenzene, adjusting the temperature value to 70 ℃, and stirring for 30min under heat preservation to obtain a homogeneous solution;
(2) adding a polyaspartic acid solution into the homogeneous phase solution obtained in the step (1), adjusting the temperature value to 50 ℃, and stirring for 40min under heat preservation to obtain an intermediate solution;
(3) adding glycerol into the intermediate solution obtained in the step (2), and stirring at the rotating speed of 3000r/min for 40min to obtain an emulsion;
(4) and (4) carrying out freezing phase separation on the emulsion obtained in the step (3), and washing and separating after the polylactic acid is solidified into microspheres to obtain the modified polylactic acid.
The mixing mass ratio of the polylactic acid to the dimethylbenzene is 1: 12.
The mixing mass ratio of the homogeneous phase solution to the polyaspartic acid solution is 5: 1;
the mass fraction of the polyaspartic acid solution is 10 percent;
the mixing mass ratio of the intermediate solution to the glycerol is 5: 2.
The plant coloring agent is one or more of flos Sophorae Immaturus extract, lignum sappan extract, radix Arnebiae extract, folium Ilicis Purpureae extract, Carthami flos extract, fructus Querci Acutissimae extract, folium Sapii extract, pericarpium Granati extract, folium Nelumbinis extract, maple leaf extract, Aloe extract, and chestnut shell extract.
The flame retardant is magnesium hydroxide.
The plasticizer is epoxidized soybean oil.
The ultraviolet absorbent is phenyl ortho-hydroxybenzoate.
The anti-aging agent is: n-phenyl-alpha-aniline;
the inorganic filler is diatomite.
A preparation method of biomass color masterbatch special for degradable plastics comprises the following steps:
(1) weighing the following components in parts by weight: plant coloring agent, cyclodextrin, flame retardant, modified polylactic acid, plasticizer, ultraviolet absorbent, anti-aging agent, inorganic filler and sodium stearate;
(2) adding the raw materials into a mixer for mixing treatment, and stirring at the rotating speed of 500r/min for 40min to obtain a mixed initial material;
(3) adding the obtained mixed primary material into a dryer, and drying at 60 ℃ for 2 hours to obtain a dried material;
(4) adding the obtained dry material into a double-screw extruder for melt extrusion granulation to obtain color master batches;
wherein the extrusion temperature of the double-screw extruder is 200 ℃.
Example 2
A biomass color master batch special for degradable plastics is prepared from the following components in parts by weight: 23 parts of plant coloring agent, 24 parts of cyclodextrin, 2 parts of flame retardant, 37 parts of modified polylactic acid, 1.8 parts of plasticizer, 1.6 parts of ultraviolet absorbent, 1.4 parts of anti-aging agent, 6.8 parts of inorganic filler and 0.35 part of sodium stearate.
The preparation method of the modified polylactic resin comprises the following steps:
(1) adding polylactic acid into dimethylbenzene, adjusting the temperature value to 70 ℃, and stirring for 30min under heat preservation to obtain a homogeneous solution;
(2) adding a polyaspartic acid solution into the homogeneous phase solution obtained in the step (1), adjusting the temperature value to 50 ℃, and stirring for 40min under heat preservation to obtain an intermediate solution;
(3) adding glycerol into the intermediate solution obtained in the step (2), and stirring at the rotating speed of 3000r/min for 40min to obtain an emulsion;
(4) and (4) carrying out freezing phase separation on the emulsion obtained in the step (3), and washing and separating after the polylactic acid is solidified into microspheres to obtain the modified polylactic acid.
The mixing mass ratio of the polylactic acid to the dimethylbenzene is 1: 12.
The mixing mass ratio of the homogeneous phase solution to the polyaspartic acid solution is 5: 1;
the mass fraction of the polyaspartic acid solution is 10 percent;
the mixing mass ratio of the intermediate solution to the glycerol is 5: 2.
The plant coloring agent is one or more of flos Sophorae Immaturus extract, lignum sappan extract, radix Arnebiae extract, folium Ilicis Purpureae extract, Carthami flos extract, fructus Querci Acutissimae extract, folium Sapii extract, pericarpium Granati extract, folium Nelumbinis extract, maple leaf extract, Aloe extract, and chestnut shell extract.
The flame retardant is magnesium hydroxide.
The plasticizer is epoxidized soybean oil.
The ultraviolet absorbent is phenyl ortho-hydroxybenzoate.
The anti-aging agent is: n-phenyl-alpha-aniline;
the inorganic filler is diatomite.
A preparation method of biomass color masterbatch special for degradable plastics comprises the following steps:
(1) weighing the following components in parts by weight: plant coloring agent, cyclodextrin, flame retardant, modified polylactic acid, plasticizer, ultraviolet absorbent, anti-aging agent, inorganic filler and sodium stearate;
(2) adding the raw materials into a mixer for mixing treatment, and stirring at the rotating speed of 500r/min for 40min to obtain a mixed initial material;
(3) adding the obtained mixed primary material into a dryer, and drying at 60 ℃ for 2 hours to obtain a dried material;
(4) adding the obtained dry material into a double-screw extruder for melt extrusion granulation to obtain color master batches;
wherein the extrusion temperature of the double-screw extruder is 200 ℃.
Example 3
A biomass color master batch special for degradable plastics is prepared from the following components in parts by weight: 23.5 parts of plant coloring agent, 22.5 parts of cyclodextrin, 2.1 parts of flame retardant, 38 parts of modified polylactic acid, 1.3 parts of plasticizer, 1.4 parts of ultraviolet absorber, 1.3 parts of anti-aging agent, 6.5 parts of inorganic filler and 0.2 part of sodium stearate.
The preparation method of the modified polylactic resin comprises the following steps:
(1) adding polylactic acid into dimethylbenzene, adjusting the temperature value to 70 ℃, and stirring for 30min under heat preservation to obtain a homogeneous solution;
(2) adding a polyaspartic acid solution into the homogeneous phase solution obtained in the step (1), adjusting the temperature value to 50 ℃, and stirring for 40min under heat preservation to obtain an intermediate solution;
(3) adding glycerol into the intermediate solution obtained in the step (2), and stirring at the rotating speed of 3000r/min for 40min to obtain an emulsion;
(4) and (4) carrying out freezing phase separation on the emulsion obtained in the step (3), and washing and separating after the polylactic acid is solidified into microspheres to obtain the modified polylactic acid.
The mixing mass ratio of the polylactic acid to the dimethylbenzene is 1: 12.
The mixing mass ratio of the homogeneous phase solution to the polyaspartic acid solution is 5: 1;
the mass fraction of the polyaspartic acid solution is 10 percent;
the mixing mass ratio of the intermediate solution to the glycerol is 5: 2.
The plant coloring agent is one or more of flos Sophorae Immaturus extract, lignum sappan extract, radix Arnebiae extract, folium Ilicis Purpureae extract, Carthami flos extract, fructus Querci Acutissimae extract, folium Sapii extract, pericarpium Granati extract, folium Nelumbinis extract, maple leaf extract, Aloe extract, and chestnut shell extract.
The flame retardant is magnesium hydroxide.
The plasticizer is epoxidized soybean oil.
The ultraviolet absorbent is phenyl ortho-hydroxybenzoate.
The anti-aging agent is: n-phenyl-alpha-aniline;
the inorganic filler is diatomite.
A preparation method of biomass color masterbatch special for degradable plastics comprises the following steps:
(1) weighing the following components in parts by weight: plant coloring agent, cyclodextrin, flame retardant, modified polylactic acid, plasticizer, ultraviolet absorbent, anti-aging agent, inorganic filler and sodium stearate;
(2) adding the raw materials into a mixer for mixing treatment, and stirring at the rotating speed of 500r/min for 40min to obtain a mixed initial material;
(3) adding the obtained mixed primary material into a dryer, and drying at 60 ℃ for 2 hours to obtain a dried material;
(4) adding the obtained dry material into a double-screw extruder for melt extrusion granulation to obtain color master batches;
wherein the extrusion temperature of the double-screw extruder is 200 ℃.
Example 4
A biomass color master batch special for degradable plastics is prepared from the following components in parts by weight: 24 parts of plant coloring agent, 22 parts of cyclodextrin, 2.2 parts of flame retardant, 37 parts of modified polylactic acid, 2.5 parts of plasticizer, 1.8 parts of ultraviolet absorbent, 1.4 parts of anti-aging agent, 5.5 parts of inorganic filler and 0.3 part of sodium stearate.
The preparation method of the modified polylactic resin comprises the following steps:
(1) adding polylactic acid into dimethylbenzene, adjusting the temperature value to 70 ℃, and stirring for 30min under heat preservation to obtain a homogeneous solution;
(2) adding a polyaspartic acid solution into the homogeneous phase solution obtained in the step (1), adjusting the temperature value to 50 ℃, and stirring for 40min under heat preservation to obtain an intermediate solution;
(3) adding glycerol into the intermediate solution obtained in the step (2), and stirring at the rotating speed of 3000r/min for 40min to obtain an emulsion;
(4) and (4) carrying out freezing phase separation on the emulsion obtained in the step (3), and washing and separating after the polylactic acid is solidified into microspheres to obtain the modified polylactic acid.
The mixing mass ratio of the polylactic acid to the dimethylbenzene is 1: 12.
The mixing mass ratio of the homogeneous phase solution to the polyaspartic acid solution is 5: 1;
the mass fraction of the polyaspartic acid solution is 10 percent;
the mixing mass ratio of the intermediate solution to the glycerol is 5: 2.
The plant coloring agent is one or more of flos Sophorae Immaturus extract, lignum sappan extract, radix Arnebiae extract, folium Ilicis Purpureae extract, Carthami flos extract, fructus Querci Acutissimae extract, folium Sapii extract, pericarpium Granati extract, folium Nelumbinis extract, maple leaf extract, Aloe extract, and chestnut shell extract.
The flame retardant is magnesium hydroxide.
The plasticizer is epoxidized soybean oil.
The ultraviolet absorbent is phenyl ortho-hydroxybenzoate.
The anti-aging agent is: n-phenyl-alpha-aniline;
the inorganic filler is diatomite.
A preparation method of biomass color masterbatch special for degradable plastics comprises the following steps:
(1) weighing the following components in parts by weight: plant coloring agent, cyclodextrin, flame retardant, modified polylactic acid, plasticizer, ultraviolet absorbent, anti-aging agent, inorganic filler and sodium stearate;
(2) adding the raw materials into a mixer for mixing treatment, and stirring at the rotating speed of 500r/min for 40min to obtain a mixed initial material;
(3) adding the obtained mixed primary material into a dryer, and drying at 60 ℃ for 2 hours to obtain a dried material;
(4) adding the obtained dry material into a double-screw extruder for melt extrusion granulation to obtain color master batches;
wherein the extrusion temperature of the double-screw extruder is 200 ℃.
Example 5
A biomass color master batch special for degradable plastics is prepared from the following components in parts by weight: 25 parts of plant coloring agent, 24 parts of cyclodextrin, 2 parts of flame retardant, 38 parts of modified polylactic acid, 2 parts of plasticizer, 1.5 parts of ultraviolet absorbent, 1.5 parts of anti-aging agent, 6 parts of inorganic filler and 0.4 part of sodium stearate.
The preparation method of the modified polylactic resin comprises the following steps:
(1) adding polylactic acid into dimethylbenzene, adjusting the temperature value to 70 ℃, and stirring for 30min under heat preservation to obtain a homogeneous solution;
(2) adding a polyaspartic acid solution into the homogeneous phase solution obtained in the step (1), adjusting the temperature value to 50 ℃, and stirring for 40min under heat preservation to obtain an intermediate solution;
(3) adding glycerol into the intermediate solution obtained in the step (2), and stirring at the rotating speed of 3000r/min for 40min to obtain an emulsion;
(4) and (4) carrying out freezing phase separation on the emulsion obtained in the step (3), and washing and separating after the polylactic acid is solidified into microspheres to obtain the modified polylactic acid.
The mixing mass ratio of the polylactic acid to the dimethylbenzene is 1: 12.
The mixing mass ratio of the homogeneous phase solution to the polyaspartic acid solution is 5: 1;
the mass fraction of the polyaspartic acid solution is 10 percent;
the mixing mass ratio of the intermediate solution to the glycerol is 5: 2.
The plant coloring agent is one or more of flos Sophorae Immaturus extract, lignum sappan extract, radix Arnebiae extract, folium Ilicis Purpureae extract, Carthami flos extract, fructus Querci Acutissimae extract, folium Sapii extract, pericarpium Granati extract, folium Nelumbinis extract, maple leaf extract, Aloe extract, and chestnut shell extract.
The flame retardant is magnesium hydroxide.
The plasticizer is epoxidized soybean oil.
The ultraviolet absorbent is phenyl ortho-hydroxybenzoate.
The anti-aging agent is: n-phenyl-alpha-aniline;
the inorganic filler is diatomite.
A preparation method of biomass color masterbatch special for degradable plastics comprises the following steps:
(1) weighing the following components in parts by weight: plant coloring agent, cyclodextrin, flame retardant, modified polylactic acid, plasticizer, ultraviolet absorbent, anti-aging agent, inorganic filler and sodium stearate;
(2) adding the raw materials into a mixer for mixing treatment, and stirring at the rotating speed of 500r/min for 40min to obtain a mixed initial material;
(3) adding the obtained mixed primary material into a dryer, and drying at 60 ℃ for 2 hours to obtain a dried material;
(4) adding the obtained dry material into a double-screw extruder for melt extrusion granulation to obtain color master batches;
wherein the extrusion temperature of the double-screw extruder is 200 ℃.
Example 6
A biomass color master batch special for degradable plastics is prepared from the following components in parts by weight: 26 parts of plant coloring agent, 25 parts of cyclodextrin, 3 parts of flame retardant, 40 parts of modified polylactic acid, 3 parts of plasticizer, 2 parts of ultraviolet absorbent, 1.6 parts of anti-aging agent, 7 parts of inorganic filler and 0.5 part of sodium stearate.
The preparation method of the modified polylactic resin comprises the following steps:
(1) adding polylactic acid into dimethylbenzene, adjusting the temperature value to 70 ℃, and stirring for 30min under heat preservation to obtain a homogeneous solution;
(2) adding a polyaspartic acid solution into the homogeneous phase solution obtained in the step (1), adjusting the temperature value to 50 ℃, and stirring for 40min under heat preservation to obtain an intermediate solution;
(3) adding glycerol into the intermediate solution obtained in the step (2), and stirring at the rotating speed of 3000r/min for 40min to obtain an emulsion;
(4) and (4) carrying out freezing phase separation on the emulsion obtained in the step (3), and washing and separating after the polylactic acid is solidified into microspheres to obtain the modified polylactic acid.
The mixing mass ratio of the polylactic acid to the dimethylbenzene is 1: 12.
The mixing mass ratio of the homogeneous phase solution to the polyaspartic acid solution is 5: 1;
the mass fraction of the polyaspartic acid solution is 10 percent;
the mixing mass ratio of the intermediate solution to the glycerol is 5: 2.
The plant coloring agent is one or more of flos Sophorae Immaturus extract, lignum sappan extract, radix Arnebiae extract, folium Ilicis Purpureae extract, Carthami flos extract, fructus Querci Acutissimae extract, folium Sapii extract, pericarpium Granati extract, folium Nelumbinis extract, maple leaf extract, Aloe extract, and chestnut shell extract.
The flame retardant is magnesium hydroxide.
The plasticizer is epoxidized soybean oil.
The ultraviolet absorbent is phenyl ortho-hydroxybenzoate.
The anti-aging agent is: n-phenyl-alpha-aniline;
the inorganic filler is diatomite.
A preparation method of biomass color masterbatch special for degradable plastics comprises the following steps:
(1) weighing the following components in parts by weight: plant coloring agent, cyclodextrin, flame retardant, modified polylactic acid, plasticizer, ultraviolet absorbent, anti-aging agent, inorganic filler and sodium stearate;
(2) adding the raw materials into a mixer for mixing treatment, and stirring at the rotating speed of 500r/min for 40min to obtain a mixed initial material;
(3) adding the obtained mixed primary material into a dryer, and drying at 60 ℃ for 2 hours to obtain a dried material;
(4) adding the obtained dry material into a double-screw extruder for melt extrusion granulation to obtain color master batches;
wherein the extrusion temperature of the double-screw extruder is 200 ℃.
The method comprises the steps of taking 201310360960.4 degradable plastic and a preparation method thereof, taking the prepared degradable plastic as a sample, adding color master batches of examples and comparative examples respectively according to the mass ratio of 10:1, preparing the degradable plastic by adopting the disclosed preparation method, testing the mechanical property of a sample strip by using a universal tester, and measuring the tensile strength of the material according to the GB/T1040-1979 standard under the condition that the speed is 20 mm/min:
TABLE 1
| Tensile strength/MPa | |
| Example 1 | 30.1 |
| Example 2 | 30.2 |
| Example 3 | 30.5 |
| Example 4 | 30.9 |
| Example 5 | 29.8 |
| Example 6 | 30.4 |
| Comparative example 1 | 28.4 |
Comparative example 1: the difference from the example 1 is that the modified polylactic acid resin is replaced by the unmodified polylactic acid;
as shown in Table 1, the color master batch prepared by the invention is introduced into degradable plastics, so that the mechanical properties, particularly the tensile strength, of the color master batch can be improved to a certain extent, and the color master batch is obviously improved.
Further experiments, degradability: the aerobic biodegradation rate of plastics under controlled composting conditions was determined by the method ASTM D5338-92:
TABLE 2
| Aerobic biodegradation Rate% | |
| Example 1 | 24.6 |
| Example 2 | 24.8 |
| Example 3 | 24.1 |
| Example 4 | 24.0 |
| Example 5 | 24.5 |
| Example 6 | 24.6 |
| Comparative example 1 | 22.7 |
Comparative example 1: the difference from the example 1 is that the modified polylactic acid resin is replaced by the unmodified polylactic acid;
as can be seen from Table 2, the biomass color master batch prepared by the invention is introduced into degradable plastics, so that the degradation performance of the biomass color master batch can be further improved.
Further experiments, the flame retardant properties were tested in a vertical burning test according to the test method specified in the UL94 standard:
TABLE 3
| Flame retardant Properties/grade | |
| Example 1 | V-1 |
| Example 2 | V-1 |
| Example 3 | V-1 |
| Example 4 | V-1 |
| Example 5 | V-1 |
| Example 6 | V-1 |
| Blank control group | V-4 |
Blank control group: application No. 201310360960.4 a degradable plastic and a plastic prepared by the method;
as can be seen from Table 3, the biomass color master batch prepared by the invention has certain flame retardant property.
The influence of different addition ratios of comparative examples on the tensile strength of the degradable plastic is determined by taking example 1 as a basic sample, and 201310360960.4 degradable plastic and plastic prepared by the preparation method thereof as a test sample.
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 (10)
1. The biomass color master batch special for degradable plastics is characterized by being prepared from the following components in parts by weight: 22-26 parts of plant coloring agent, 20-25 parts of cyclodextrin, 1-3 parts of flame retardant, 35-40 parts of modified polylactic acid, 1-3 parts of plasticizer, 1-2 parts of ultraviolet absorbent, 1.2-1.6 parts of anti-aging agent, 5-7 parts of inorganic filler and 0.2-0.5 part of sodium stearate.
2. The biomass color masterbatch special for degradable plastics as claimed in claim 1, wherein: the preparation method of the modified polylactic resin comprises the following steps:
(1) adding polylactic acid into dimethylbenzene, adjusting the temperature value to 70 ℃, and stirring for 30min under heat preservation to obtain a homogeneous solution;
(2) adding a polyaspartic acid solution into the homogeneous phase solution obtained in the step (1), adjusting the temperature value to 50 ℃, and stirring for 40min under heat preservation to obtain an intermediate solution;
(3) adding glycerol into the intermediate solution obtained in the step (2), and stirring at the rotating speed of 3000r/min for 40min to obtain an emulsion;
(4) and (4) carrying out freezing phase separation on the emulsion obtained in the step (3), and washing and separating after the polylactic acid is solidified into microspheres to obtain the modified polylactic acid.
3. The biomass color masterbatch special for degradable plastics as claimed in claim 2, wherein the mixing mass ratio of polylactic acid to xylene is 1: 12.
4. The biomass color masterbatch special for degradable plastics as claimed in claim 2, wherein the mixing mass ratio of the homogeneous solution to the polyaspartic acid solution is 5: 1;
the mass fraction of the polyaspartic acid solution is 10 percent;
the mixing mass ratio of the intermediate solution to the glycerol is 5: 2.
5. The biomass color masterbatch special for degradable plastics as claimed in claim 1, wherein: the plant coloring agent is one or more of flos Sophorae Immaturus extract, lignum sappan extract, radix Arnebiae extract, folium Ilicis Purpureae extract, Carthami flos extract, fructus Querci Acutissimae extract, folium Sapii extract, pericarpium Granati extract, folium Nelumbinis extract, maple leaf extract, Aloe extract, and chestnut shell extract.
6. The biomass color masterbatch special for degradable plastics as claimed in claim 1, wherein: the flame retardant is magnesium hydroxide.
7. The biomass color masterbatch special for degradable plastics as claimed in claim 1, wherein the plasticizer is epoxidized soybean oil.
8. The biomass color masterbatch special for degradable plastics as claimed in claim 1, wherein the ultraviolet absorber is phenyl ortho-hydroxybenzoate.
9. The biomass color masterbatch special for degradable plastics as claimed in claim 1, wherein the anti-aging agent is: n-phenyl-alpha-aniline;
the inorganic filler is diatomite.
10. The preparation method of the biomass color masterbatch special for degradable plastics as claimed in claim 1, characterized by comprising the following steps:
(1) weighing the following components in parts by weight: plant coloring agent, cyclodextrin, flame retardant, modified polylactic acid, plasticizer, ultraviolet absorbent, anti-aging agent, inorganic filler and sodium stearate;
(2) adding the raw materials into a mixer for mixing treatment, and stirring at the rotating speed of 500r/min for 40min to obtain a mixed initial material;
(3) adding the obtained mixed primary material into a dryer, and drying at 60 ℃ for 2 hours to obtain a dried material;
(4) adding the obtained dry material into a double-screw extruder for melt extrusion granulation to obtain color master batches;
wherein the extrusion temperature of the double-screw extruder is 200 ℃.
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| CN202111498490.9A CN113980445A (en) | 2021-12-09 | 2021-12-09 | Special biomass color master batch for degradable plastics and preparation method thereof |
| PCT/CN2021/141983 WO2023103116A1 (en) | 2021-12-09 | 2021-12-28 | Special biomass color masterbatch for degradable plastic and preparation method therefor |
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| CN202111498490.9A CN113980445A (en) | 2021-12-09 | 2021-12-09 | Special biomass color master batch for degradable plastics and preparation method thereof |
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Cited By (1)
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| CN115612071A (en) * | 2022-08-30 | 2023-01-17 | 山东理工大学 | Preparation method of antibacterial colored polylactic acid |
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| WO2023103116A1 (en) | 2023-06-15 |
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