CN117362945A - Aging-resistant moisturizing PBAT/PLA/PPC film material and preparation method thereof - Google Patents
Aging-resistant moisturizing PBAT/PLA/PPC film material and preparation method thereof Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 52
- 230000003020 moisturizing effect Effects 0.000 title claims abstract description 37
- 230000032683 aging Effects 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 229920001896 polybutyrate Polymers 0.000 title claims abstract 14
- 239000004626 polylactic acid Substances 0.000 claims abstract description 60
- 229920000747 poly(lactic acid) Polymers 0.000 claims abstract description 59
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 51
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 claims abstract description 26
- -1 polybutylene terephthalate-adipate Polymers 0.000 claims abstract description 26
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 22
- 239000000440 bentonite Substances 0.000 claims abstract description 22
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 22
- 239000000314 lubricant Substances 0.000 claims abstract description 21
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 8
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 8
- 229940092782 bentonite Drugs 0.000 claims description 21
- CTENFNNZBMHDDG-UHFFFAOYSA-N Dopamine hydrochloride Chemical group Cl.NCCC1=CC=C(O)C(O)=C1 CTENFNNZBMHDDG-UHFFFAOYSA-N 0.000 claims description 16
- 229960001149 dopamine hydrochloride Drugs 0.000 claims description 16
- 239000002002 slurry Substances 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 6
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- ONCZQWJXONKSMM-UHFFFAOYSA-N dialuminum;disodium;oxygen(2-);silicon(4+);hydrate Chemical group O.[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Na+].[Na+].[Al+3].[Al+3].[Si+4].[Si+4].[Si+4].[Si+4] ONCZQWJXONKSMM-UHFFFAOYSA-N 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- 229940080314 sodium bentonite Drugs 0.000 claims description 5
- 229910000280 sodium bentonite Inorganic materials 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 239000006097 ultraviolet radiation absorber Substances 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 239000003607 modifier Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 239000011159 matrix material Substances 0.000 abstract description 4
- 230000003712 anti-aging effect Effects 0.000 abstract description 2
- 239000012752 auxiliary agent Substances 0.000 abstract description 2
- 238000013329 compounding Methods 0.000 abstract description 2
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 description 15
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 13
- 230000004888 barrier function Effects 0.000 description 4
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- 238000012986 modification Methods 0.000 description 3
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- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical group CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229920000704 biodegradable plastic Polymers 0.000 description 2
- SIXOAUAWLZKQKX-UHFFFAOYSA-N carbonic acid;prop-1-ene Chemical compound CC=C.OC(O)=O SIXOAUAWLZKQKX-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920006381 polylactic acid film Polymers 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 229940037312 stearamide Drugs 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- 229920000881 Modified starch Polymers 0.000 description 1
- 239000004368 Modified starch Substances 0.000 description 1
- 208000034530 PLAA-associated neurodevelopmental disease Diseases 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000002313 adhesive film Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
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- 239000002131 composite material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- 238000010096 film blowing Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
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- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
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- 244000005700 microbiome Species 0.000 description 1
- 235000019426 modified starch Nutrition 0.000 description 1
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- 230000000149 penetrating effect Effects 0.000 description 1
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- 239000012466 permeate Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000005501 phase interface Effects 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920001690 polydopamine Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2467/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2469/00—Characterised by the use of polycarbonates; Derivatives of polycarbonates
-
- 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
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/06—Pretreated ingredients and ingredients covered by the main groups C08K3/00 - C08K7/00
-
- 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
- C08K3/34—Silicon-containing compounds
- C08K3/346—Clay
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/13—Phenols; Phenolates
- C08K5/134—Phenols containing ester groups
- C08K5/1345—Carboxylic esters of phenolcarboxylic acids
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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
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/20—Carboxylic acid amides
-
- 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
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/52—Phosphorus bound to oxygen only
- C08K5/524—Esters of phosphorous acids, e.g. of H3PO3
- C08K5/526—Esters of phosphorous acids, e.g. of H3PO3 with hydroxyaryl compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/08—Ingredients agglomerated by treatment with a binding agent
Abstract
The invention discloses an aging-resistant moisturizing PBAT/PLA/PPC film material and a preparation method thereof. The film material comprises the following components in percentage by mass: 50-80 parts of polybutylene terephthalate-adipate, 10-30 parts of polylactic acid, 10-20 parts of polymethyl ethylene carbonate, 2-8 parts of bentonite, 1-5 parts of weather-proof agent, 2-6 parts of antioxidant and 3-5 parts of lubricant. According to the invention, the anti-aging moisturizing biodegradable film material is obtained by adding polymethyl ethylene carbonate and modified bentonite into a polybutylene terephthalate-adipic acid matrix and a polylactic acid matrix and matching with other auxiliary agents. The compatibility between matrixes is improved by compounding the polymethyl ethylene carbonate and the modified bentonite, and the fluidity and the film forming property of the film are improved. The aging-resistant moisturizing film material obtained by the invention has excellent air-blocking moisturizing performance, excellent biodegradability and excellent mechanical properties.
Description
Technical Field
The invention belongs to the technical field of biodegradable film materials, and particularly relates to an aging-resistant moisturizing PBAT/PLA/PPC film material and a preparation method thereof.
Background
The appearance of plastic products brings infinite convenience to people and becomes a necessity for daily life. At present, the raw materials of the plastic products are mainly petroleum-based polyethylene, polypropylene and the like, and the materials are nondegradable, are the source of white pollution and bring indistinct pressure to the environment and society. Therefore, there is an urgent need for biodegradable plastics instead.
The molecular chain structure of polybutylene terephthalate-adipate (PBAT) contains rich ester bonds, and can be catabolized by various microorganisms in nature, so that the polybutylene terephthalate-adipate (PBAT) is a biodegradable plastic widely studied at home and abroad. However, PBAT has a low melt index, poor processability, and poor openness when blown into a film; and the ester bonds in the molecular chain structure and the large amount of benzene rings accelerate the aging of PBAT. In order to reduce the production cost and improve the processing performance of the PBAT, blending modification is the simplest and efficient mode.
Polylactic acid (PLA) is a polyester polymer obtained by polymerizing lactic acid as a main raw material, can be completely degraded, and is widely applied to blending modification of PBAT. For example, the invention patent CN 115368715A discloses a completely biodegradable self-adhesive film material and a preparation method thereof, PBAT and PLA are used as base materials, and biodegradable penetrating fluid and biodegradable tackifying resin are added into a formula system, so that the adhesiveness and mechanical property of the film are improved, and the production cost is reduced. The invention patent CN 113845621A discloses a compatibilizer and a full-biodegradable film with high starch content adopting the compatibilizer, PBAT, PLA and modified starch are used as base materials, and the compatibilizer is added into the system to enhance the compatibility among the components of the base materials, so that the mechanical property of the film material is improved, and the cost is greatly reduced.
The above patents all use PBAT and PLA as main base materials, and the following defects still exist: (1) The addition of the biodegradable permeate, the tackifying resin and the macromolecular compatibilizer not only additionally increases the cost, but also makes the process flow more complex; (2) The compatibility between the PBAT and the PLA is poor, and the phase interface is weak, which is not beneficial to the improvement of the mechanical property; (3) The film has poor barrier property and cannot ensure the moisture and gas resistance.
Disclosure of Invention
Aiming at the defects, the invention aims to provide an aging-resistant and moisturizing PBAT/PLA/PPC film material which is biodegradable, aging-resistant, air-blocking and moisturizing and has excellent mechanical properties.
In order to solve the technical problems, the technical scheme of the invention is as follows: an aging-resistant moisturizing PBAT/PLA/PPC film material comprises the following components in percentage by mass:
50-80 parts of polybutylene terephthalate-adipate (PBAT), 10-30 parts of polylactic acid (PLA), 10-20 parts of polymethyl ethylene carbonate (PPC), 2-8 parts of bentonite, 1-5 parts of weather-proof agent, 2-6 parts of antioxidant and 3-5 parts of lubricant.
Preferably, the polybutylene terephthalate-adipate has a weight average molecular weight of 1.0X10 5 g/mol～2.0×10 5 g/mol, polylactic acid having a weight average molecular weight of 1.0X10 4 g/mol～2.0×10 4 g/mol。
Preferably, the polymethyl ethylene carbonate has a weight average molecular weight of 2.0X10 4 g/mol～1.0×10 5 g/mol。
Preferably, the bentonite is sodium bentonite with a particle size of less than 2 μm.
Preferably, the bentonite is modified bentonite, and the modifier is dopamine hydrochloride.
Preferably, the mass fraction of the dopamine hydrochloride is 50-80 wt% of bentonite.
Preferably, the preparation method of the modified bentonite comprises the following steps:
s1, adding deionized water into a sodium bentonite raw material to obtain bentonite slurry with the concentration of 10-15 wt%, and stirring to uniformly disperse the bentonite slurry;
s2, dissolving quantitative dopamine hydrochloride in deionized water to obtain a dopamine hydrochloride solution;
s3, adding the dopamine hydrochloride solution obtained in the step S2 into the bentonite slurry obtained in the step S1, and continuing stirring and reacting for 2 hours;
s4, washing, dehydrating, drying and crushing the slurry obtained in the step S3 to obtain the modified bentonite.
Preferably, the weather-resistant agent is an ultraviolet absorber.
Preferably, the antioxidant is one or a combination of two of antioxidant 1010 and antioxidant 168 in any proportion.
Preferably, the lubricant is vinyl bis-stearamide.
The invention also provides a preparation method of the aging-resistant moisturizing PBAT/PLA/PPC film material, which comprises the following steps:
s1, adding polybutylene terephthalate-adipate, polylactic acid, a weather-resistant agent, an antioxidant and a lubricant into a double-screw extruder from a main feeding port for melt blending;
s2, adding polymethyl ethylene carbonate and modified bentonite in a side feeding mode, continuously melting and blending, extruding and granulating to obtain PBAT/PLA/PPC master batch;
s3, adding the master batch obtained in the step S2 into a blowing machine for blowing and forming a film to obtain the PBAT/PLA/PPC film.
Compared with the prior art, the invention has the following beneficial effects:
(1) According to the invention, the poly (butylene terephthalate) -adipate and the poly (lactic acid) matrix are added with the poly (methyl ethylene carbonate) and the modified bentonite, and other auxiliary agents are matched to obtain the anti-aging moisturizing biodegradable film material, the compatibility between the matrixes is improved through the compounding use of the poly (methyl ethylene carbonate) and the modified bentonite, the fluidity and the film forming property of the film are improved, the air-blocking moisturizing property of the PBAT/PLA film material is improved, the ultraviolet absorber is selected as a weather-resistant agent, the antioxidant 1010 and the antioxidant 168 are selected as a composite antioxidant, and the vinyl bis-stearamide is selected as a lubricant, and the PBAT/PLA/PPC film material is obtained through the modes of melt blending, extrusion granulation and blow molding film forming.
(2) According to the invention, the bentonite is modified by selecting the dopamine hydrochloride, the dopamine hydrochloride has strong adhesive force to both organic and inorganic matrixes, and is easy to polymerize on the surface of the material to form polydopamine, so that the compatibility between the inorganic filler and matrix resin is enhanced.
(3) The invention enhances the barrier property of the PBAT/PLA film material by selecting the bentonite, and the bentonite has a layered structure and can be arranged in parallel in the film blowing process, thereby blocking the passage of small molecular gas and water vapor and leading the film material to have excellent barrier property.
Detailed Description
For a better understanding of the present invention, the present invention is further described below in connection with a number of embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In the following examples, an aging-resistant moisturizing PBAT/PLA/PPC film material was prepared using the following method:
s1, adding polybutylene terephthalate-adipate, polylactic acid, a weather-resistant agent, an antioxidant and a lubricant into a double-screw extruder from a main feeding port for melt blending;
s2, adding polymethyl ethylene carbonate and modified bentonite in a side feeding mode, continuously melting and blending, extruding and granulating to obtain PBAT/PLA/PPC master batch;
s3, adding the master batch obtained in the step S2 into a blowing machine for blowing and forming a film to obtain the PBAT/PLA/PPC film.
The preparation method of the modified bentonite comprises the following steps:
s1, adding deionized water into a sodium bentonite raw material to obtain bentonite slurry with the concentration of 10-15 wt%, and stirring to uniformly disperse the bentonite slurry;
s2, dissolving quantitative dopamine hydrochloride into deionized water to obtain a dopamine hydrochloride solution, wherein the mass fraction of the dopamine hydrochloride is 50-80 wt% of bentonite;
s3, adding the dopamine hydrochloride solution obtained in the step S2 into the bentonite slurry obtained in the step S1, and continuing stirring and reacting for 2 hours;
s4, washing, dehydrating, drying and crushing the slurry obtained in the step S3 to obtain the modified bentonite.
Example 1
An aging-resistant moisturizing PBAT/PLA/PPC film material comprises the following components in percentage by mass: 50 parts of polybutylene terephthalate-adipate, 30 parts of polylactic acid, 20 parts of polymethyl ethylene carbonate, 4 parts of modified bentonite, 5 parts of weather resistant agent, 2 parts and 4 parts of antioxidant 1010 and 168 respectively, and 3 parts of lubricant (EBS).
Example 2
An aging-resistant moisturizing PBAT/PLA/PPC film material comprises the following components in percentage by mass: 60 parts of polybutylene terephthalate-adipate, 20 parts of polylactic acid, 20 parts of polymethyl ethylene carbonate, 6 parts of modified bentonite, 5 parts of weather resistant agent, 2 parts and 4 parts of antioxidant 1010 and 168 and 4 parts of lubricant (EBS) respectively.
Example 3
An aging-resistant moisturizing PBAT/PLA/PPC film material comprises the following components in percentage by mass: 70 parts of polybutylene terephthalate-adipate, 10 parts of polylactic acid, 20 parts of polymethyl ethylene carbonate, 8 parts of modified bentonite, 5 parts of weather resistant agent, 2 parts and 4 parts of antioxidant 1010 and 168, and 5 parts of lubricant (EBS).
Example 4
An aging-resistant moisturizing PBAT/PLA/PPC film material comprises the following components in percentage by mass: 80 parts of polybutylene terephthalate-adipate, 10 parts of polylactic acid, 10 parts of polymethyl ethylene carbonate, 2 parts of modified bentonite, 5 parts of weather resistant agent, 2 parts and 4 parts of antioxidant 1010 and 168 respectively, and 3 parts of lubricant (EBS).
Example 5
An aging-resistant moisturizing PBAT/PLA/PPC film material comprises the following components in percentage by mass: 70 parts of polybutylene terephthalate-adipate, 20 parts of polylactic acid, 10 parts of polymethyl ethylene carbonate, 2 parts of modified bentonite, 5 parts of weather resistant agent, 2 parts and 4 parts of antioxidant 1010 and 168 and 4 parts of lubricant (EBS).
Example 6
An aging-resistant moisturizing PBAT/PLA/PPC film material comprises the following components in percentage by mass: 60 parts of polybutylene terephthalate-adipate, 30 parts of polylactic acid, 10 parts of polymethyl ethylene carbonate, 4 parts of modified bentonite, 5 parts of weather resistant agent, 2 parts and 4 parts of antioxidant 1010 and 168 respectively, and 5 parts of lubricant (EBS).
Example 7
An aging-resistant moisturizing PBAT/PLA/PPC film material comprises the following components in percentage by mass: 70 parts of polybutylene terephthalate-adipate, 15 parts of polylactic acid, 15 parts of polymethyl ethylene carbonate, 6 parts of modified bentonite, 5 parts of weather resistant agent, 2 parts and 4 parts of antioxidant 1010 and 168, respectively, and 3 parts of lubricant (EBS).
Example 8
An aging-resistant moisturizing PBAT/PLA/PPC film material comprises the following components in percentage by mass: 65 parts of polybutylene terephthalate-adipate, 20 parts of polylactic acid, 15 parts of polymethyl ethylene carbonate, 8 parts of modified bentonite, 5 parts of weather resistant agent, 2 parts and 4 parts of antioxidant 1010 and 168 and 4 parts of lubricant (EBS) respectively.
Example 9
An aging-resistant moisturizing PBAT/PLA/PPC film material comprises the following components in percentage by mass: 75 parts of polybutylene terephthalate-adipate, 10 parts of polylactic acid, 15 parts of polymethyl ethylene carbonate, 4 parts of modified bentonite, 5 parts of weather resistant agent, 2 parts and 4 parts of antioxidant 1010 and 168, and 5 parts of lubricant (EBS).
Comparative example 1
An aging-resistant moisturizing film material comprises the following components in percentage by mass: 70 parts of polybutylene terephthalate-adipate, 30 parts of polylactic acid, 5 parts of weather-proof agent, 2 parts and 4 parts of antioxidant 1010 and 4 parts of antioxidant 168, respectively, and 4 parts of lubricant (EBS).
In this comparative example, the preparation method was the same as in the above example except that polymethyl ethylene carbonate and modified bentonite were not added.
Comparative example 2
An aging-resistant moisturizing film material comprises the following components in percentage by mass: 80 parts of polybutylene terephthalate-adipate, 20 parts of polylactic acid, 5 parts of weather-proof agent, 2 parts and 4 parts of antioxidant 1010 and 4 parts of antioxidant 168 respectively and 4 parts of lubricant (EBS).
In this comparative example, the preparation method was the same as in the above example except that polymethyl ethylene carbonate and modified bentonite were not added.
Comparative example 3
An aging-resistant moisturizing film material comprises the following components in percentage by mass: 70 parts of polybutylene terephthalate-adipate, 20 parts of polylactic acid, 10 parts of polymethyl ethylene carbonate, 5 parts of weather resistant agent, 2 parts and 4 parts of antioxidant 1010 and 168 and 4 parts of lubricant (EBS) respectively.
In this comparative example, the preparation method was the same as in the above example except that modified bentonite was not added.
Comparative example 4
An aging-resistant moisturizing film material comprises the following components in percentage by mass: 70 parts of polybutylene terephthalate-adipate, 20 parts of polylactic acid, 10 parts of polymethyl ethylene carbonate, 5 parts of weather resistant agent, 2 parts and 4 parts of antioxidant 1010 and 168 and 4 parts of lubricant (EBS) respectively.
In this comparative example, the preparation method was the same as in the above example except that polymethyl ethylene carbonate was not added.
The following table shows the properties of the film materials prepared in examples 1-9 and comparative examples 1-4.
As can be seen from the above table, the mechanical properties of the PBAT/PLA/PPC film materials prepared in examples 1 to 9 of the present invention are obviously improved, and the oxygen and water vapor permeability coefficient is obviously reduced, compared with the film materials prepared in comparative example 1, comparative example 2 and comparative example 3 and comparative example 4 which are not added with polymethyl ethylene carbonate and modified bentonite, so that the mechanical properties and barrier properties of the film materials are enhanced, and the air-barrier and moisture-retaining effects are obviously improved by adding the polymethyl ethylene carbonate and the modified bentonite.
The foregoing is illustrative of the present invention and is not to be construed as limiting the scope of the invention. Any equivalent changes and modifications can be made by those skilled in the art without departing from the spirit and principles of this invention, and are intended to be within the scope of this invention.
Claims (10)
1. The aging-resistant moisturizing PBAT/PLA/PPC film material is characterized by comprising the following components in percentage by mass:
50-80 parts of polybutylene terephthalate-adipate, 10-30 parts of polylactic acid, 10-20 parts of polymethyl ethylene carbonate, 2-8 parts of bentonite, 1-5 parts of weather-proof agent, 2-6 parts of antioxidant and 3-5 parts of lubricant.
2. The aging-resistant moisturizing PBAT/PLA/PPC film material of claim 1, wherein the polybutylene terephthalate-adipate has a weight average molecular weight of 1.0 x 10 5 g/mol～2.0×10 5 g/mol, polylactic acid having a weight average molecular weight of 1.0X10 4 g/mol～2.0×10 4 g/mol。
3. The aging-resistant moisturizing PBAT/PLA/PPC film material as claimed in claim 1,the method is characterized in that: the weight average molecular weight of the polymethyl ethylene carbonate is 2.0X10 4 g/mol～1.0×10 5 g/mol。
4. The aging-resistant moisturizing PBAT/PLA/PPC film material of claim 1, wherein: the bentonite is sodium bentonite with the particle size smaller than 2 mu m.
5. The aging-resistant moisturizing PBAT/PLA/PPC film material of claim 1, wherein: the bentonite is modified bentonite, and the modifier is dopamine hydrochloride.
6. The aging-resistant moisturizing PBAT/PLA/PPC film material of claim 5, wherein: the mass fraction of the dopamine hydrochloride is 50-80 wt% of bentonite.
7. The aging-resistant moisturizing PBAT/PLA/PPC film material as claimed in claim 5, wherein the preparation method of the modified bentonite is as follows:
s1, adding deionized water into a sodium bentonite raw material to obtain bentonite slurry with the concentration of 10-15 wt%, and stirring to uniformly disperse the bentonite slurry;
s2, dissolving quantitative dopamine hydrochloride in deionized water to obtain a dopamine hydrochloride solution;
s3, adding the dopamine hydrochloride solution obtained in the step S2 into the bentonite slurry obtained in the step S1, and continuing stirring and reacting for 2 hours;
s4, washing, dehydrating, drying and crushing the slurry obtained in the step S3 to obtain the modified bentonite.
8. The aging-resistant moisturizing PBAT/PLA/PPC film material of claim 1, wherein: the weather-proof agent is an ultraviolet absorber.
9. The method for preparing the aging-resistant moisturizing PBAT/PLA/PPC film material as claimed in claim 5, comprising the following steps:
s1, adding polybutylene terephthalate-adipate, polylactic acid, a weather-resistant agent, an antioxidant and a lubricant into a double-screw extruder from a main feeding port for melt blending;
s2, adding polymethyl ethylene carbonate and modified bentonite in a side feeding mode, continuously melting and blending, extruding and granulating to obtain PBAT/PLA/PPC master batch;
s3, adding the master batch obtained in the step S2 into a blowing machine for blowing and forming a film to obtain the PBAT/PLA/PPC film.
10. An aging-resistant moisturizing PBAT/PLA/PPC film material obtained by the preparation method of claim 9.
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