CN114410073B - Biodegradable material capable of being subjected to irradiation sterilization and preparation method thereof - Google Patents
Biodegradable material capable of being subjected to irradiation sterilization and preparation method thereof Download PDFInfo
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- CN114410073B CN114410073B CN202111615332.7A CN202111615332A CN114410073B CN 114410073 B CN114410073 B CN 114410073B CN 202111615332 A CN202111615332 A CN 202111615332A CN 114410073 B CN114410073 B CN 114410073B
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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
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
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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
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
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Abstract
The invention discloses a biodegradable material capable of being sterilized by irradiation, which mainly comprises the following components in parts by mass: polylactic acid: 20-60 parts of a lubricant; PBS:30-60 parts; toughening agent: 10-20 parts of a lubricant; an antioxidant: 0.2-1 part; light stabilizers: 0.1-0.5 part; compounded yellowing-resistant stabilizer: 1-4 parts; dispersing lubricant: 0.5-4 parts. The material is added with an antioxidant, a light stabilizer, an irradiation sterilization stabilizer and the like, so that the material can not be aged and decomposed, yellow and mechanical properties are reduced, harmful monomers are generated and the like when the material is subjected to ultraviolet ray and gamma ray irradiation sterilization, and the use requirement of medical food packaging materials is met.
Description
Technical Field
The invention relates to the field of materials, in particular to a biodegradable material capable of being subjected to irradiation sterilization and a preparation method thereof.
Background
The disposable medical supplies, food packaging materials, articles for daily use and other parts of products need to be sterilized, and the most rapid and efficient sterilization modes with low cost in the existing sterilization modes are ultraviolet lamp sterilization and gamma ray irradiation sterilization. However, in the actual use process, for most plastic products, after ultraviolet and gamma ray irradiation, the material performance can be reduced to different degrees, and the normal use in the later period is affected.
Thus, solving the problem that the degradation of the irradiation aging performance of plastics is an urgent need for solving by each large supplier.
Disclosure of Invention
It is an object of the present invention to provide a new solution for radiation sterilizable biodegradable materials.
According to a first aspect of the present invention, there is provided a radiation sterilizable biodegradable material comprising mainly the following components in parts by mass:
polylactic acid: 20-60 parts of a lubricant;
polybutylene succinate: 30-60 parts;
toughening agent: 10-20 parts of a lubricant;
an antioxidant: 0.2-1 part;
light stabilizers: 0.1-0.5 part;
compounded yellowing-resistant stabilizer: 1-4 parts;
dispersing lubricant: 0.5-4 parts.
Preferably, the composition mainly comprises the following components in parts by weight:
polylactic acid: 35 parts;
polybutylene succinate: 45 parts;
toughening agent: 20 parts;
an antioxidant: 0.6 parts;
light stabilizers: 0.4 parts;
compounded yellowing-resistant stabilizer: 2.8 parts;
dispersing lubricant: 2 parts.
Preferably, the toughening agent is one or more of ethylene-vinyl acetate copolymer, ethylene-vinyl versatate-vinyl acetate copolymer and vinyl acetate-vinyl laurate copolymer.
Preferably, the antioxidant is one or more of tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid stearyl alcohol ester, N' -bis- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexamethylenediamine and tris [2, 4-di-tert-butylphenyl ] phosphite.
Preferably, the light stabilizer is one or more of 2- (2H-benzotriazole-2-hydroxy) -4, 6-bis (1-methyl-1-phenylethyl) phenol, 2- (2-hydroxy-3, 5-di-tert-butylphenyl) -5-chlorobenzotriazole and 1- (2-hydroxy-5-tert-octylphenyl) benzotriazole.
Preferably, the compound yellowing-resistant stabilizer comprises the following components in parts by mass:
base material I: 0.24-1.0 parts;
and (2) a base material II: 0.40-2.0 parts;
octocrylene: 0.10-0.42 parts;
zinc stearate: 0.08-0.18 parts;
calcium stearate: 0.10-0.20 parts;
hydrotalcite: 0.08-0.20 parts;
wherein the first base material is: one or more of 3, 9-bis (2, 4-dicumylphenoxy) -2,4,8, 10-tetraoxa-3, 9-diphosphaspiro [5.5] undecane, 3, 9-bis [1, 1-dimethyl-2- [ (3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy ] ethyl ] -2,4,8, 10-tetraoxaspiro [5.5] undecane, bisoctaalkyl pentaerythritol bisphosphite or cyclic quaternium pentanetetra-bis (2, 6-di-tert-butyl-4-methylphenyl phosphite);
the second base material is: di-n-octyltin maleate or di-n-octyltin S, S' -bis (isooctylthioglycolate).
Preferably, the dispersing lubricant is one or more of EBS, AC-316A, silicone powder, methyl silicone oil and PE wax.
According to a second aspect of the present invention, there is provided a method for preparing the radiation sterilizable biodegradable material described above, comprising the steps of:
adding polylactic acid, polybutylene succinate PBS, a toughening agent, an antioxidant, a light stabilizer, a compound yellowing-resistant stabilizer and a dispersion lubricant into a mixer according to parts by weight, mixing for 10-20 min, extruding the premixed mixture through an extruder, water-cooling an extrusion strip through a water tank, blowing to dryness through a blower, and then pulling the extrusion strip to a blanking machine for granulating to finish the preparation of the radiation-sterilizable biodegradable material
Preferably, the extrusion temperature of the extruder is: a region: 90-110 ℃; two areas: 125-135 ℃; three regions: 135-145 ℃; four regions: 140-160 ℃; five regions: 140-160 ℃; six areas: 140-160 ℃; seven areas: 140-160 ℃; eight areas: 135-150 ℃; nine regions: 130-150 ℃; ten areas: 130-150 ℃; machine head: 120-150 ℃; host rotational speed: 350r/min, feeding rotating speed: 15-20r/min.
According to the embodiment of the disclosure, the material can not be aged and decomposed, yellowing, mechanical property reduction, harmful monomer and other phenomena when the material is subjected to ultraviolet radiation and gamma ray irradiation sterilization by adding the antioxidant, the light stabilizer, the compound yellowing-resistant stabilizer and the like, so that the use requirement of the medical food packaging material is met.
Other features of the present invention and its advantages will become apparent from the following detailed description of exemplary embodiments of the invention.
Detailed Description
Various exemplary embodiments of the invention will now be described in detail. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.
The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any specific values should be construed as merely illustrative and not a limitation. Thus, other examples of exemplary embodiments may have different values.
Example 1
The radiation-sterilizable biodegradable material in the embodiment mainly comprises the following components in parts by mass:
polylactic acid: 60 parts;
polybutylene succinate (PBS): 30 parts;
toughening agent: 10 parts;
an antioxidant: 0.2 parts;
light stabilizers: 0.1 part;
compounded yellowing-resistant stabilizer: 1 part;
dispersing lubricant: 0.5 part.
Among them, polylactic acid is a synthetic aliphatic polyester, and the degradation thereof can be classified into simple hydrolysis (acid-base catalyzed) degradation and enzyme-catalyzed hydrolysis degradation. From a physical point of view there are homogeneous and heterogeneous degradations. Heterogeneous degradation refers to degradation reactions occurring at the polymer surface, while homogeneous degradation occurs within the polymer. From a chemical point of view, there are three main modes of degradation: (1) the main chain is degraded to generate oligomer and monomer; (2) hydrolyzing the side chain to generate a soluble main chain polymer; (3) cleavage at the crosslinking point yields a soluble linear polymer. The main mode of polylactic acid degradation is considered to be bulk erosion by the bulk erosion mechanism, and the reason is the hydrolysis of ester bonds on the polylactic acid molecular chain. The carboxyl end group (introduced by polymerization and generated by degradation) of the polylactic acid polymer plays a role in catalyzing the hydrolysis of the polylactic acid polymer, and the carboxyl end group quantity is increased and the degradation rate is accelerated along with the degradation, so that an autocatalysis phenomenon is generated.
The lactic acid is derived from renewable resources, and is polymerized, modified and processed into products, when the products are abandoned, the products can be completely absorbed by human bodies or are biologically degraded into carbon dioxide and water by the environment, so that the human beings return to nature without pollution, the production process of the polylactic acid is pollution-free, and the products can be biologically degraded to realize the circulation in the nature, so that the polylactic acid is an ideal green polymer material.
The toughening agent is one or more of ethylene-vinyl acetate copolymer, ethylene-vinyl versatate-vinyl acetate copolymer and vinyl acetate-vinyl laurate copolymer.
The antioxidant is one or more of pentaerythritol tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], stearyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate, N' -bis- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexamethylenediamine and tris [2, 4-di-tert-butylphenyl ] phosphite.
The light stabilizer is one or more of 2- (2H-benzotriazole-2-hydroxy) -4, 6-bis (1-methyl-1-phenethyl) phenol, 2- (2-hydroxy-3, 5-di-tert-butylphenyl) -5-chlorobenzotriazole and 1- (2-hydroxy-5-tert-octylphenyl) benzotriazole.
The compound yellowing-resistant stabilizer is one or more of 3, 9-bis (2, 4-dicumylphenoxy) -2,4,8, 10-tetraoxa-3, 9-diphosphaspiro [5.5] undecane, 3, 9-bis [1, 1-dimethyl-2- [ (3-tertiary butyl-4-hydroxy-5-methylphenyl) propionyloxy ] ethyl ] -2,4,8, 10-tetraoxaspiro [5.5] undecane, dioctadecyl pentaerythritol bisphosphite, cyclic quaternary pentane tetrayl bis (2, 6-di-tertiary butyl-4-methylphenyl phosphite), octocrylene, di-n-octyl tin maleate, S' -di (isooctyl thioglycolate) di-n-octyl tin, hydrotalcite calcium stearate and zinc stearate.
The preparation method of the compound agent comprises the following steps: 3, 9-bis (2, 4-dicumylphenoxy) -2,4,8, 10-tetraoxa-3, 9-diphosphaspiro [5.5] undecane or 3, 9-bis [1, 1-dimethyl-2- [ (3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy ] ethyl ] -2,4,8, 10-tetraoxaspiro [5.5] undecane or dioctadecyl pentaerythritol bisphosphite or cyclic quaterther bis (2, 6-di-tert-butyl-4-methylphenyl phosphite) is stirred with 0.1-0.42 part of octorilin in a high-speed mixing pot for 2min, then 0.08-0.18 part of zinc stearate, 0.10-0.20 part of calcium stearate and 0.08-0.20 part of hydrotalcite are added, and finally 0.4-2.0 part of di-n-octyl tin maleate or S, S' -bis (diisooctyl) tin sulfate is added for later use, and the mixture is stirred at a high speed for 2min, and the low-speed for 5 min.
The dispersing lubricant is one or more of EBS, AC-316A, silicone powder, methyl silicone oil and PE wax.
The irradiation-sterilizable biodegradable material mainly comprises the following steps in the preparation process:
the raw materials are added into a mixer according to a proportion and mixed for 10-20 min, the premixed materials are extruded by an extruder, the materials are pulled into strips and cooled by a water tank, and then dried by a blower and pulled to a cutter to complete granulating, thus obtaining the material. Process setting extruder temperature: a region: 90-110 ℃; two areas: 125-135 ℃; 3. zone: 135-145 ℃; four regions: 140-160 ℃; five regions: 140-160 ℃; six areas: 140-160 ℃; seven areas: 140-160 ℃; eight areas: 135-150 ℃; nine regions: 130-150 ℃; 10. zone: 130-150 ℃; machine head: 120-150 ℃. Host rotational speed: 350r/min, feeding rotation speed: 15-20r/min.
The material is added with an antioxidant, a light stabilizer, a compound yellowing-resistant stabilizer and the like, so that the phenomena of aging decomposition, yellowing, mechanical property reduction, harmful monomer and the like of the material after being irradiated by high-energy rays are reduced when the material is subjected to ultraviolet radiation sterilization and gamma ray radiation sterilization, and the use requirement of the medical food packaging material is met.
Example 2
The radiation-sterilizable biodegradable material in the embodiment mainly comprises the following components in parts by mass:
polylactic acid: 20 parts;
PBS:60 parts;
toughening agent: 20 parts;
an antioxidant: 1 part;
light stabilizers: 0.5 parts;
compounded yellowing-resistant stabilizer: 4 parts;
dispersing lubricant: 4 parts.
The toughening agent is an ethylene-vinyl acetate copolymer; the antioxidant is pentaerythritol tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ]; the light stabilizer is 2- (2H-benzotriazole-2-hydroxy) -4, 6-bis (1-methyl-1-phenylethyl) phenol.
The materials of the components are prepared by the preparation method in the example 1, and the radiation sterilized biodegradable material is prepared.
Example 3
The radiation-sterilizable biodegradable material in the embodiment mainly comprises the following components in parts by mass:
polylactic acid: 40 parts;
PBS:45 parts;
toughening agent: 15 parts;
an antioxidant: 0.6 parts;
light stabilizers: 0.3 parts;
compounded yellowing-resistant stabilizer: 2.5 parts;
dispersing lubricant: 2.5 parts.
Wherein the toughening agent is an ethylene-vinyl acetate copolymer; the antioxidant is pentaerythritol tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ]; the light stabilizer is 2- (2H-benzotriazole-2-hydroxy) -4, 6-bis (1-methyl-1-phenylethyl) phenol.
The materials of the components are prepared by the preparation method in the example 1, and the radiation sterilized biodegradable material is prepared.
Example 4
The radiation-sterilizable biodegradable material in the embodiment mainly comprises the following components in parts by mass:
polylactic acid: 35 parts;
PBS:45 parts;
toughening agent: 20 parts;
an antioxidant: 0.6 parts;
light stabilizers: 0.4 parts;
compounded yellowing-resistant stabilizer: 2.8 parts;
dispersing lubricant: 2 parts.
Wherein the toughening agent is an ethylene-vinyl acetate copolymer; the antioxidant is pentaerythritol tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ]; the light stabilizer is 2- (2H-benzotriazole-2-hydroxy) -4, 6-bis (1-methyl-1-phenylethyl) phenol.
The materials of the components are prepared by the preparation method in the example 1, and the radiation sterilized biodegradable material is prepared.
Comparative example 1
The biodegradable material in the comparative example mainly comprises the following components in parts by mass:
polylactic acid: 35 parts;
PBS:45 parts;
toughening agent: 20 parts;
an antioxidant: 0.6 parts;
dispersing lubricant: 2 parts.
Wherein the toughening agent is an ethylene-vinyl acetate copolymer; the antioxidant is pentaerythritol tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ].
The materials of the above components were prepared by the preparation method in example 1 to prepare a radiation-sterilizable biodegradable material comparative example 1.
Comparative example 2
The biodegradable material in the comparative example mainly comprises the following components in parts by mass:
polylactic acid: 35 parts;
PBS:45 parts;
toughening agent: 20 parts;
an antioxidant: 0.6 parts;
light stabilizers: 0.4 parts;
dispersing lubricant: 2 parts.
Wherein the toughening agent is an ethylene-vinyl acetate copolymer; the antioxidant is pentaerythritol tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ]; the light stabilizer is 2- (2H-benzotriazole-2-hydroxy) -4, 6-bis (1-methyl-1-phenylethyl) phenol.
The materials of the above components were prepared by the preparation method in example 1 to prepare a radiation sterilizable biodegradable material comparative example 2.
Comparative example 3
The biodegradable material in the comparative example mainly comprises the following components in parts by mass:
polylactic acid: 35 parts;
PBS:45 parts;
toughening agent: 20 parts;
an antioxidant: 0.6 parts;
compounded yellowing-resistant stabilizer: 1 part;
dispersing lubricant: 2 parts.
Wherein the toughening agent is an ethylene-vinyl acetate copolymer; the antioxidant is pentaerythritol tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ]; the compound yellowing-resistant stabilizer in the embodiment 1 is selected.
The materials of the above components were prepared by the preparation method in example 1, to prepare comparative example 3 of radiation-sterilizable biodegradable materials.
The irradiation sterilized biodegradable materials prepared according to examples 1, 2,3, and 4 were prepared with the general biodegradable materials prepared in comparative example 1 and comparative irradiation sterilized biodegradable materials prepared in comparative example 2 and comparative example 3, sheets having thicknesses of 1mm and 6mm were manufactured by a tabletting machine, a tensile dumbbell bar and 8 x 10mm sample pieces were manufactured by a punching machine from the 1mm sheets, and a 10 x 10mm hardness test sample piece was manufactured by a cutter from the 6mm sheets. Then dividing the prepared sample into 2 groups, placing one group of sample into a constant temperature and humidity laboratory for 24 hours, testing, taking out the other group of sample after gamma-ray irradiation of 60kGy dose, and placing the other group of sample into a constant temperature and humidity laboratory for 24 hours, wherein the test results are as follows:
table 1: comparison of the parameter Performance of examples 1, 2,3,4 with comparative examples 1, 2,3
As can be seen from the table above: in the tensile strength and the material hardness of the example 4 added with the proper photo-aging agent and the compound yellowing-resistant agent, the change of the color before and after irradiation and the yellowing index are the lowest, and in the example 3, the tensile strength and the material hardness of the comparative example 1 without adding any light stabilizer and the compound yellowing-resistant agent are the largest after irradiation, the color turns into yellow brown, and the yellowing index reaches 5. From the examples 2,3 and 4, the function of aging and yellowing resistance of the material under gamma-ray irradiation can be obtained by adding a proper amount of light stabilizer 2- (2H-benzotriazole-2-hydroxy) -4, 6-bis (1-methyl-1-phenylethyl) phenol and 1- (2-hydroxy-5-tert-octylphenyl) benzotriazole and a compound yellowing-resistant stabilizer formula.
The invention aims to invent an anti-aging yellowing auxiliary agent which is applied to biodegradable food and drug packaging materials and is convenient for rapid sterilization scheme radiation sterilization biodegradable materials, and the light stabilizer and the compound anti-yellowing stabilizer used in the invention can better ensure the material performance and anti-aging yellowing function of the biodegradable materials after gamma-ray irradiation from the experimental results before and after the embodiment.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and the hardness of the packaging material is different according to the customer, the ratio of the base material and the biodegradable substrate are selected or changed, but the chemical components used in the light stabilizer and the yellowing stabilizer (or other names such as aging resistance auxiliary) are the same or similar, and the changes with different parts are protected.
Claims (8)
1. The biodegradable material capable of being sterilized by irradiation is characterized by mainly comprising the following components in parts by mass:
polylactic acid: 20-60 parts of a lubricant;
polybutylene succinate: 30-60 parts;
toughening agent: 10-20 parts of a lubricant;
an antioxidant: 0.2-1 part;
light stabilizers: 0.1-0.5 part;
compounded yellowing-resistant stabilizer: 1-4 parts;
dispersing lubricant: 0.5-4 parts;
the compound yellowing-resistant stabilizer comprises the following components in parts by mass:
base material I: 0.24-1.0 parts;
and (2) a base material II: 0.40-2.0 parts;
octocrylene: 0.10-0.42 parts;
zinc stearate: 0.08-0.18 parts;
calcium stearate: 0.10-0.20 parts;
hydrotalcite: 0.08-0.20 parts;
wherein the first base material is: one or more of 3, 9-bis (2, 4-dicumylphenoxy) -2,4,8, 10-tetraoxa-3, 9-diphosphaspiro [5.5] undecane, 3, 9-bis [1, 1-dimethyl-2- [ (3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy ] ethyl ] -2,4,8, 10-tetraoxaspiro [5.5] undecane, dioctadecyl pentaerythritol bisphosphite or cyclic quaternium-pentandio (2, 6-di-tert-butyl-4-methylphenyl phosphite);
the second base material is: di-n-octyltin maleate or di-n-octyltin S, S' -bis (isooctylthioglycolate).
2. The radiation sterilizable biodegradable material according to claim 1, characterized in that it comprises mainly the following components in parts by mass:
polylactic acid: 35 parts;
polybutylene succinate: 45. a part(s);
toughening agent: 20 parts;
an antioxidant: 0.6 parts;
light stabilizers: 0.4 parts;
compounded yellowing-resistant stabilizer: 2.8 parts;
dispersing lubricant: 2 parts.
3. The radiation sterilizable biodegradable material of claim 1, wherein the toughening agent is one or more of ethylene-vinyl acetate copolymer, ethylene-vinyl versatate-vinyl acetate copolymer, and vinyl acetate-vinyl laurate copolymer.
4. The radiation sterilizable biodegradable material according to claim 1, characterized in that the antioxidant is one or several of pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], stearyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate, N' -bis- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexamethylenediamine and tris [2, 4-di-tert-butylphenyl ] phosphite.
5. The radiation sterilizable biodegradable material according to claim 1, characterized in that said light stabilizer is one or several of 2- (2H-benzotriazole-2-hydroxy) -4, 6-bis (1-methyl-1-phenylethyl) phenol, 2- (2-hydroxy-3, 5-di-tert-butylphenyl) -5-chlorobenzotriazole and 1- (2-hydroxy-5-tert-octylphenyl) benzotriazole.
6. The radiation sterilizable biodegradable material according to claim 1, characterized in that said dispersion lubricant is one or more of EBS, AC-316A, silicone powder, methyl silicone oil and PE wax.
7. A method for preparing a radiation sterilizable biodegradable material according to any one of claims 1 to 6, characterized in that it comprises mainly the following steps:
adding polylactic acid, polybutylene succinate PBS, a toughening agent, an antioxidant, a light stabilizer, a compound yellowing-resistant stabilizer and a dispersion lubricant into a mixer according to parts by weight, mixing for 10-20 min, extruding the premixed mixture through an extruder, water-cooling an extrusion strip through a water tank, blow-drying by a blower, and then pulling the extrusion strip to a blanking machine for granulating to finish the preparation of the radiation-sterilizable biodegradable material
8. The method for producing radiation sterilizable biodegradable material according to claim 7, characterized in that the extrusion temperature of said extruder is: a region: 90-110 ℃; two areas: 125-135 ℃; three regions: 135-145 ℃; four regions: 140-160 ℃; five regions: 140-160 ℃; six areas: 140-160 ℃; seven areas: 140-160 ℃; eight areas: 135-150 ℃; nine regions: 130-150 ℃; ten areas: 130-150 ℃; machine head: 120-150 ℃; host rotational speed: 350r/min, feeding rotation speed: 15-20r/min.
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| CN103013070A (en) * | 2012-12-11 | 2013-04-03 | 奇瑞汽车股份有限公司 | Polylactic acid composite material and preparation method thereof |
| CN109575539A (en) * | 2018-10-31 | 2019-04-05 | 诺思贝瑞新材料科技（苏州）有限公司 | A kind of high-ductility matt modified polylactic acid material and preparation method thereof for 3D printing |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103013070A (en) * | 2012-12-11 | 2013-04-03 | 奇瑞汽车股份有限公司 | Polylactic acid composite material and preparation method thereof |
| CN109575539A (en) * | 2018-10-31 | 2019-04-05 | 诺思贝瑞新材料科技（苏州）有限公司 | A kind of high-ductility matt modified polylactic acid material and preparation method thereof for 3D printing |
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