CN113736224A - PBAT/PLA composite material composition and particles and film prepared from PBAT/PLA composite material composition - Google Patents
PBAT/PLA composite material composition and particles and film prepared from PBAT/PLA composite material composition Download PDFInfo
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- CN113736224A CN113736224A CN202110730605.6A CN202110730605A CN113736224A CN 113736224 A CN113736224 A CN 113736224A CN 202110730605 A CN202110730605 A CN 202110730605A CN 113736224 A CN113736224 A CN 113736224A
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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
- 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
- C08L2203/00—Applications
- C08L2203/16—Applications used for films
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention relates to the technical field of degradation materials, and discloses a PBAT/PLA composite material composition and particles and films prepared from the same, wherein the composition comprises the following components in parts by weight: 50-80 parts of PBAT, 3-10 parts of PLA, 1-5 parts of PVA, 0.5-1 part of water, 10-30 parts of starch, 1-5 parts of plasticizer, 0.1-1 part of lubricant, 0.1-0.5 part of compatilizer and 0.1-1 part of chain extender. The particles and the film prepared from the composite material composition provided by the invention have excellent performance and are biodegradable, and are suitable for the field of packaging materials.
Description
Technical Field
The invention relates to the technical field of degradation materials, in particular to a PBAT/PLA composite material composition and particles and a film prepared from the PBAT/PLA composite material composition.
Background
Along with the development of the society, the problem of plastics is increasingly serious, nondegradable plastics are visible everywhere in our life, the search for alternative degradable materials is a necessary trend, PBAT and PLA in the degradable materials have excellent performance and can be completely degraded, the degradable materials are environment-friendly materials, contain flexible fatty chains, ensure that the degradable materials have good flexibility of molecular chains, contain benzene rings, improve the thermal stability of molecules, reduce the degradation speed of the molecules, enlarge the molecular space of PBAT, and are convenient to blend with other molecules. PLA is a high molecular material polymerized from lactic acid, has the characteristics of no toxicity, no irritation, high strength, easy processing and forming, excellent biocompatibility and the like, but has poor compatibility between PBAT and PLA.
Disclosure of Invention
The invention aims to overcome the problem of poor compatibility among materials and provides a PBAT/PLA composite material composition and particles and a film prepared from the PBAT/PLA composite material composition. The particles and the film prepared from the composite material composition provided by the invention have excellent performance and are biodegradable, and are suitable for the field of packaging materials.
In order to achieve the above object, in a first aspect, the present invention provides a PBAT/PLA composite composition comprising, in parts by weight: 50-80 parts of PBAT, 3-10 parts of PLA, 1-5 parts of PVA, 0.5-1 part of water, 10-30 parts of starch, 1-5 parts of plasticizer, 0.1-1 part of lubricant, 0.1-0.5 part of compatilizer and 0.1-1 part of chain extender.
In a second aspect, the present invention provides a method for preparing PBAT/PLA composite particles, the method comprising:
(1) putting water, plasticizer, PVA and starch into a stirrer together, and stirring for 13-16 min;
(2) adding PBAT, PLA and an auxiliary agent into the plasticized starch, stirring for 5-10min, and stirring uniformly for later use;
(3) and extruding and granulating the uniformly stirred mixture by using a parallel double-screw granulator unit.
In a third aspect, the invention provides a PBAT/PLA composite film made by blow molding the pellets made by the method of the invention through a blow molding machine.
According to the invention, the PBAT and the PLA are modified, and the excellent performances of the PBAT and the PLA are combined to prepare the biodegradable plastic product which has excellent performance and can be used in the field of packaging.
Detailed Description
The following describes in detail specific embodiments of the present invention. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
The present invention will be described in detail below by way of examples. In the following examples, each material used was commercially available unless otherwise specified, and the method used was a conventional method in the art unless otherwise specified.
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
In a first aspect, the present invention provides a PBAT/PLA composite composition comprising, in parts by weight: 50-80 parts of PBAT, 3-10 parts of PLA, 1-5 parts of PVA, 0.5-1 part of water, 10-30 parts of starch, 1-5 parts of plasticizer, 0.1-1 part of lubricant, 0.1-0.5 part of compatilizer and 0.1-1 part of chain extender.
The inventor of the invention overcomes the compatibility problem of PBAT and PLA by modifying PBAT and PLA, and can be used for preparing biodegradable packaging materials with excellent performance.
In the present invention, preferably, the composition comprises, in parts by weight: 50-60 parts of PBAT, 7-9 parts of PLA, 1-3 parts of PVA, 0.7-1 part of water, 10-25 parts of starch, 1-5 parts of plasticizer, 0.1-0.5 part of lubricant, 0.1-0.5 part of compatilizer and 0.1-0.5 part of chain extender.
In the present invention, it is preferable to use PBAT having a melt flow rate of 2.99g/10min of raw material from the Higherkinson HighTech Co., Ltd in the embodiment of the present invention.
In the present invention, preferably, PLA having a melt flow rate of 10.52g/10min, which is manufactured by Nature Works, is used in the embodiment of the present invention.
In the present invention, the PVA is a partially alcoholysis type PVA, and preferably, the PVA has a polymerization degree of 2400-. For example, it may be one or more of the designations 0388, 0588, 1788, 2088, 2288, 2488.
In the invention, the starch is one or more of corn starch, cassava starch, sweet potato starch, wheat starch, water chestnut starch and lotus root starch. In a particular embodiment of the invention, the starch is corn starch.
In the present invention, preferably, the plasticizer is one or more of ethylene glycol, glycerin, sorbitol, mannitol, neopentyl glycol, trimethylolpropane, tetramethylolpropane, diethylene glycol, polyethylene glycol 200, polyethylene glycol 400, glycerin, diethanolamine, triethanolamine, diglycerin, triglycerin, pentaglycerol, decaglycerol, and diethylene glycol.
In the present invention, preferably, the lubricant is one or more of paraffin wax, polyethylene wax, oxidized polyethylene wax, hardened oil, triglycerol monostearate, pentaerythritol stearate, stearic acid, and calcium stearate.
In the present invention, preferably, the compatibilizing agent is one or more of an aluminate coupling agent, a titanate coupling agent and anhydrous citric acid.
In the present invention, preferably, the chain extender is a polyurethane chain extender. For example, it may be ADR4368 or ADR 4370.
In a second aspect, the present invention provides a method for preparing PBAT/PLA composite particles, the method comprising:
(1) putting water, plasticizer, PVA and starch into a stirrer together, and stirring for 13-16 min;
(2) adding PBAT, PLA and an auxiliary agent into the plasticized starch, stirring for 5-10min, and stirring uniformly for later use;
(3) and extruding and granulating the uniformly stirred mixture by using a parallel double-screw granulator unit.
In a third aspect, the invention provides a PBAT/PLA composite film made by blow molding the pellets made by the method of the invention through a blow molding machine.
In the specific embodiment of the invention, water, plasticizer, PVA and starch are stirred for 13-16min at the temperature of 60 ℃ under the condition of 100-300 r/min; and adding the PBAT, the PLA and the auxiliary agent into the plasticized starch, continuously stirring for 5-10min, and uniformly mixing for granulation for film blowing and film making. (3) The temperature of each zone of the double-screw extruder is set as follows: first zone 35 deg.C, second zone 45 deg.C, third zone 75 deg.C, fourth zone 125 deg.C, fifth zone 135 deg.C, sixth zone 140 deg.C, seventh zone 145 deg.C, eighth zone 145 deg.C, ninth zone 150 deg.C, tenth zone 150 deg.C, eleventh zone 155 deg.C, twelfth zone 160 deg.C, thirteenth zone 165 deg.C, and head 160 deg.C; the screw rotation speed 380-400rpm is set.
The present invention will be described in detail below with reference to examples, but the present invention is not limited to the following examples.
Example 1
A PBAT/PLA composite material composition comprises the following raw materials in parts by weight:
56 parts of PBAT, 8 parts of PLA, 05881 parts of water, 0.8 part of starch, 3 parts of glycerol, 0.4 part of stearic acid, 0.5 part of anhydrous citric acid and 43680.4 parts of ADR.
Example 2
A PBAT/PLA composite material composition comprises the following raw materials in parts by weight:
56 parts of PBAT, 8 parts of PLA, 05881.5 parts of water, 0.8 part of starch, 3 parts of glycerol, 0.4 part of stearic acid, 0.5 part of anhydrous citric acid and 43680.4 parts of ADR.
Example 3
A PBAT/PLA composite material composition comprises the following raw materials in parts by weight:
56 parts of PBAT, 8 parts of PLA, 05882 parts of water, 0.9 part of starch, 20 parts of glycerol, 0.4 part of stearic acid, 0.5 part of anhydrous citric acid and 43680.4 parts of ADR.
Comparative example 1
A PBAT/PLA composite material composition comprises the following raw materials in parts by weight:
56 parts of PBAT, 8 parts of PLA, 05881 parts of water, 0.9 part of starch, 5 parts of glycerol, 0.4 part of triglycerol monostearate, 0.5 part of anhydrous citric acid and 43680.4 parts of ADR.
Comparative example 2
A PBAT/PLA composite material composition comprises the following raw materials in parts by weight:
56 parts of PBAT, 8 parts of PLA, 05882 parts of water, 0.9 part of starch, 20 parts of sorbitol, 0.4 part of triglycerol monostearate, 0.5 part of anhydrous citric acid and 43680.4 parts of ADR.
The above examples 1 to 3 and comparative examples 1 to 2 were prepared by (1) mixing 0.8 parts by weight of water and 3 parts by weight of glycerin with stirring; (2) mixing 20 parts by weight of starch and 1 part by weight of 0588, pouring into a high-speed mixer, adding the (1), and stirring at high speed for 13-16 min; (3) adding 56 parts by weight of PBAT, 8 parts by weight of PLA, 0.4 part by weight of stearic acid, 0.5 part by weight of anhydrous citric acid and 0.4 part by weight of ADR4368 into the mixture in the step (2), stirring for 5-10min, and discharging for later use; (4) pouring the mixture obtained in the step (3) into a granulator for granulation; (5) examples 2 and 3 and comparative examples 1 and 2 were pelletized and blown by a blow molding machine in the same manner to obtain films S1 to S3 and D1 to D2, and the films were subjected to the following property tests, the results of which are shown in Table 1.
Wherein, tensile strength, heat seal strength, lifting and dart dropping: and testing according to a corresponding national standard testing method.
And (3) testing tensile property: according to the test of GB/T1040.3-2006, the sample adopts type 2, the length is 150mm, the width is 15mm, and the test speed is 200 mm/min. Detecting data of the sample in the longitudinal direction and the transverse direction;
testing the heat seal strength: the test speed is 300mm/min +/-50 mm/min according to the QB/T2358 test.
And (4) carrying out lifting performance test according to the regulation of GB/T21661-2008.
Dart impact test, carried out in GB/T9639.1-2008.
TABLE 1
As can be seen from table 1: the PBAT/PLA composite film provided by the invention has excellent performances and is suitable for various packaging bags.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (11)
1. A PBAT/PLA composite composition, characterized in that the composition comprises, in parts by weight: 50-80 parts of PBAT, 3-10 parts of PLA, 1-5 parts of PVA, 0.5-1 part of water, 10-30 parts of starch, 1-5 parts of plasticizer, 0.1-1 part of lubricant, 0.1-0.5 part of compatilizer and 0.1-1 part of chain extender.
2. The PBAT/PLA composite composition of claim 1, wherein the composition comprises, in parts by weight: 50-60 parts of PBAT, 7-9 parts of PLA, 1-3 parts of PVA, 0.7-1 part of water, 10-25 parts of starch, 1-5 parts of plasticizer, 0.1-0.5 part of lubricant, 0.1-0.5 part of compatilizer and 0.1-0.5 part of chain extender.
3. The PBAT/PLA composite composition of claim 1 or 2, wherein the PBAT has a melt flow rate of 2.99g/10 min;
preferably, the melt flow rate of the PLA is 10.52g/10 min.
4. The PBAT/PLA composite composition of claim 1 or 2, wherein the PVA has a degree of polymerization of 2400-.
5. The PBAT/PLA composite composition of claim 1 or 2, wherein the starch is one or more of corn starch, tapioca starch, sweet potato starch, wheat starch, water chestnut starch, and lotus root starch.
6. The PBAT/PLA composite composition of claim 1 or 2, wherein the plasticizer is one or more of ethylene glycol, glycerol, sorbitol, mannitol, neopentyl glycol, trimethylolpropane, tetramethylolpropane, diethylene glycol, polyethylene glycol 200, polyethylene glycol 400, glycerol, diethanolamine, triethanolamine, diglycerol, triglycerol, pentaglycerol, decaglycerol, and diethylene glycol.
7. The PBAT/PLA composite composition of claim 1 or 2, wherein the lubricant is one or more of paraffin wax, polyethylene wax, oxidized polyethylene wax, hardened oil, triglycerol monostearate, pentaerythritol stearate, stearic acid, and calcium stearate.
8. The PBAT/PLA composite composition of claim 1 or 2, wherein the compatibilizing agent is one or more of an aluminate coupling agent, a titanate coupling agent, and anhydrous citric acid.
9. The PBAT/PLA composite composition of claim 1 or 2, wherein the chain extender is a polyurethane-based chain extender.
10. A method for preparing PBAT/PLA composite particles, which is characterized by comprising the following steps:
(1) putting water, plasticizer, PVA and starch into a stirrer together, and stirring for 13-16 min;
(2) adding PBAT, PLA and an auxiliary agent into the plasticized starch, stirring for 5-10min, and stirring uniformly for later use;
(3) and extruding and granulating the uniformly stirred mixture by using a parallel double-screw granulator unit.
11. The pellets produced by the method of claim 10 are blown through a blow molding machine to produce a PBAT/PLA composite film.
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| CN202110730605.6A CN113736224A (en) | 2021-06-29 | 2021-06-29 | PBAT/PLA composite material composition and particles and film prepared from PBAT/PLA composite material composition |
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| CN202110730605.6A CN113736224A (en) | 2021-06-29 | 2021-06-29 | PBAT/PLA composite material composition and particles and film prepared from PBAT/PLA composite material composition |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116144147A (en) * | 2022-12-22 | 2023-05-23 | 四川大学 | Environment-friendly composite material and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112111133A (en) * | 2020-08-17 | 2020-12-22 | 江苏碧升生物新材料有限公司 | Preparation method of polybutylene terephthalate adipate/polylactic acid/starch ternary blending film blowing resin |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112111133A (en) * | 2020-08-17 | 2020-12-22 | 江苏碧升生物新材料有限公司 | Preparation method of polybutylene terephthalate adipate/polylactic acid/starch ternary blending film blowing resin |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116144147A (en) * | 2022-12-22 | 2023-05-23 | 四川大学 | Environment-friendly composite material and preparation method thereof |
| CN116144147B (en) * | 2022-12-22 | 2024-03-22 | 四川大学 | Environment-friendly composite material and preparation method thereof |
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Application publication date: 20211203 |