CN112898753A - Polylactic acid/PBAT/thermoplastic starch composite foaming flame-retardant material and preparation method thereof - Google Patents
Polylactic acid/PBAT/thermoplastic starch composite foaming flame-retardant material and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a polylactic acid/PBAT/thermoplastic starch composite foaming flame-retardant material and a preparation method thereof. The composite foaming flame-retardant material comprises the following components in percentage by weight: 74% -95% of PLA/PBAT/thermoplastic starch matrix, 3% -16% of flame retardant, 1% -5% of compatibilizer and 1% -5% of chemical foaming agent; wherein the PLA/PBAT/thermoplastic starch matrix is prepared from the following components in parts by weight: 55-80 parts of PLA, 8-23 parts of PBAT and 12-22 parts of thermoplastic starch. The preparation method is that the plasticizer and the starch are banburied to prepare the thermoplastic starch; mixing PLA, PBAT, thermoplastic starch, a compatibilizer, a foaming agent and a flame retardant, and then obtaining the PLA/PBAT/thermoplastic starch composite foaming flame retardant material by a compression molding technology. The PLA/PBAT/thermoplastic starch composite flame-retardant foaming material prepared by the invention has good compatibility, low cost, good flame retardance and certain excellent mechanical property, and can be directly prepared into degradable foaming products by adopting injection molding, extrusion and mould pressing foaming molding processes.
Description
Technical Field
The invention relates to the technical field of macromolecules, in particular to a polylactic acid/PBAT/thermoplastic starch composite foaming flame-retardant material and a preparation method thereof.
Background
Nowadays, petrochemical resources are increasingly withered, and the renewable and biodegradable environment-friendly thermoplastic high polymer material has wide application prospect in research and application. Polylactic acid (PLA) has two characteristics of regeneration and biodegradation, is the most ideal 'green' material for replacing the traditional petroleum-based material, can be completely degraded by microorganisms in nature after being used, has good mechanical property and physical property, is close to Polystyrene (PS) plastic, but has the defects of brittle texture, poor impact resistance, unstable thermal property, poor melt strength, high price and flammability. The melt is difficult to support the growth of cells in the foaming process, and the defects of foam merging, breakage, collapse and the like are generated. And the biodegradable material can cause performance reduction due to easy degradation in the using process, and the service life of the material is reduced. As a novel plastic, the high price and the crisp quality become key factors for limiting large-scale replacement of petroleum-based materials such as Polyethylene (PE), polypropylene (PP), PS and the like by PLA in the application fields.
In addition, the flame retardant property of PLA is poor, the phenomenon of melt dripping is easy to occur in the combustion process, and the flame retardant is required to be added to improve the flame retardant property of PLA, but the flame retardant is used as a filler to be added into a polymer matrix, so that the dispersibility and the compatibility of the PLA with an organic polymer are poor, and the PLA is easy to agglomerate, thereby affecting the mechanical property of the polymer.
Starch is a low cost degradable filler for degradable materials such as PLA. However, starch is thermodynamically incompatible with PLA and modification of starch is required to increase compatibility. Modification is usually done by adding a plasticizer of polyol type, but the polyol in the PLA matrix can cause degradation of PLA and migration to the material surface, resulting in degradation of material properties.
Disclosure of Invention
The purpose of the invention is as follows: the invention provides a polylactic acid/PBAT/starch composite foaming flame-retardant material and a preparation method thereof, aiming at solving the defects of foam merging, breaking, uneven cell distribution and other cell morphologies of PLA in the foaming and forming process, wherein polylactic acid, starch and PBAT are incompatible systems, the blending of the polylactic acid, the starch and the PBAT is difficult to disperse uniformly, and the like cause poor tensile strength; polylactic acid is easily affected by the environment, and the degradation rate is slow.
The technical scheme is as follows:
a polylactic acid/PBAT/thermoplastic starch composite foaming flame-retardant material comprises the following components in percentage by weight:
74% -95% of PLA/PBAT/thermoplastic starch matrix,
3 to 16 percent of flame retardant,
1 to 5 percent of compatibilizer,
1% -5% of foaming agent;
wherein the PLA/PBAT/thermoplastic starch matrix comprises the following components in parts by weight:
55-80 parts of PLA (polylactic acid),
8-23 parts of PBAT (poly (butylene adipate terephthalate)),
12-22 parts of thermoplastic starch.
The thermoplastic starch is obtained by plasticizing and modifying starch by a plasticizer.
The plasticizer is at least one of polyalcohol, amide and oil.
The compatibilizer is at least one of polyethylene glycol, an ADR chain extender and dicumyl peroxide.
The flame retardant is at least one of an intumescent flame retardant, a metal hydroxide flame retardant and a phosphorus flame retardant.
The foaming agent is at least one of an organic foaming agent, an inorganic foaming agent and a physical foaming agent.
A preparation method of a polylactic acid/PBAT/thermoplastic starch composite foaming flame-retardant material comprises the following steps:
(1) placing PLA, PBAT and starch into vacuum drying at 80-100 ℃, and standing for 8-12 h; weighing 20-30 parts of starch and 5-10 parts of plasticizer, placing the starch and the plasticizer in an internal mixer at the temperature of 100-170 ℃, stirring at the rotating speed of 50-80r/min for 10-15min, and grinding a product after the reaction is finished to finally obtain thermoplastic starch;
(2) weighing 74-95 wt% of PLA/PBAT/thermoplastic starch polymer matrix, wherein the polymer matrix comprises 12-22 parts of thermoplastic starch, 55-80 parts of dried PLA and 8-23 parts of PBAT, then weighing 1-5wt% of compatibilizer and 3-16wt% of flame retardant, adding the mixture into a 160-180 ℃ internal mixer, stirring for 10-15min at the rotating speed of 50-80r/min, and grinding the product after stirring uniformly to obtain the PLA/PP/starch composite material with small particle size;
(3) after 95-99wt% of PLA/PP/starch composite material and 1-5wt% of chemical foaming agent are uniformly mixed, the polylactic acid/PBAT/thermoplastic starch composite foaming flame-retardant material is prepared by a forming method.
Molding methods include injection molding, extrusion, and compression molding of plastics.
When the molding method is to mold the plastic, the polylactic acid/PBAT/starch composite foaming flame-retardant material is molded and foamed in a flat vulcanizing machine, wherein the molding temperature is 180-200 ℃, and the pressure is 5-8 MPa.
The advantages and effects are as follows:
the PLA/PBAT/thermoplastic starch composite flame-retardant foaming material prepared by the invention has better mechanical property, lower cost and high flame-retardant property, and the maximum limit oxygen index of the composite flame-retardant foaming material can reach 35.2%. The degradable high-flame-retardant performance foaming material can be obtained by directly adopting a mould pressing foaming forming process, the forming process is simple, the product design freedom degree is high, the industrial application is convenient, and the mass production is realized.
Drawings
FIG. 1 is a mechanical property diagram of a PLA/PBAT/thermoplastic starch composite foaming flame-retardant material;
FIG. 2 is a combustion image diagram of the PLA/PBAT/thermoplastic starch composite foaming flame retardant material.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
the invention solves the defects of foam morphology such as foam merging, breaking, uneven foam hole distribution and the like in the foaming and forming process of PLA; polylactic acid, starch and PBAT are incompatible systems, and the three are mixed and difficult to disperse uniformly. Polylactic acid is susceptible to environmental influences and has a slow degradation rate.
At present, for the preparation of the foaming flame-retardant material, most of matrix resin adopts non-degradable PP or PE or degradable materials with high production cost such as PLA and the like; the problems exist in that the selection of matrix resin, the preparation cost of the foaming flame-retardant material, the compatibility of polymers and the selection of flame retardant are required to be considered, so that the multifunctional foaming flame-retardant material with good performance is prepared.
The invention utilizes the wide source and low price of starch, and the production cost of PLA-based plastic products can be reduced by blending PLA and starch. The plasticizer of polyalcohol and/or amides and oil and fat destroys hydrogen bonds among starch molecules, improves the mobility of molecular chains, and reduces the entanglement capacity, crystallinity and glass transition temperature among the starch molecular chains, thereby forming thermoplastic starch, changing the hydrophilicity of the starch into hydrophobicity, reducing the interfacial adhesion force, improving the compatibility of two phases of the PLA/starch composite material, and enhancing the bonding force of the PLA and the starch. Thereby avoiding the problem that the polyol causes degradation of PLA in the PLA matrix and migration to the surface of the material, which leads to the reduction of the performance of the material.
For the brittleness of PLA, after the polylactic acid/PBAT composite material is blended with the PBAT material, the biodegradability of the material can be ensured, no pollution hazard is caused to the environment, and the toughness of the PLA material can be improved, so that the PLA material has better mechanical property, higher elongation at break and ductility. After the compatibilizer for PLA is blended with the plasticized thermoplastic starch, PBAT and the flame retardant, one end of the compatibilizer is the carboxyl of the PLA and reacts with the compatibilizer to form an ester bond, the carboxyl of the PLA is connected with the PLA, and the other end of the compatibilizer is connected with a PBAT molecular chain to form hydrogen bonds to be mutually entangled to form a cross-linked network shape, so that the compatibility of the PBAT/PLA is improved, the interfacial bonding force of the PBAT/PLA is enhanced, the melt strength of the composite material is improved, and a necessary place is provided for foaming.
PLA is used as aliphatic polyester, and due to the organic characteristic, the flame retardant property is seriously insufficient, the PLA is easy to burn, the phenomenon of molten drop is serious in the combustion process and the like, and the flame retardant is added to improve the flame retardant property of the PLA and eliminate the phenomenon of molten drop. The invention adds the intumescent flame retardant to improve the flame retardant property of the material, and can also be used as a nucleation point to form a compact bubble nucleus, and the higher melt effectively restrains bubbles in the growth of the bubbles to support the growth of the bubbles, thereby obtaining the PLA/PBAT/starch foaming composite flame retardant material with compact and uniform bubbles.
The following examples and comparative examples are used to further describe the present invention, but the present invention is not limited to these examples. The plasticizer is at least one of polyalcohol, amide and grease. The polyhydric alcohol may preferably be glycerin or the like; the amide may preferably be formamide or the like; the fats and oils may preferably be epoxidized soybean oil or the like. The compatibilizer is at least one of polyethylene glycol, ADR chain extender and dicumyl peroxide. The flame retardant is at least one of an intumescent flame retardant, a metal hydroxide flame retardant and a phosphorus flame retardant. The foaming agent is at least one of an organic foaming agent, an inorganic foaming agent and a physical foaming agent. When each component is a single reagent or a composite reagent, the technical effect of the invention can be achieved by adjusting the proportion for a limited time.
Example 1
The PLA/PBAT/thermoplastic starch composite foaming flame-retardant material in the embodiment is prepared from the following raw materials in percentage by weight:
95% of PLA/PBAT/thermoplastic starch matrix,
1 percent of compatibilizer,
1 percent of foaming agent,
3% of flame retardant.
Wherein the PLA/PBAT/thermoplastic starch matrix is prepared from the following components in parts by weight:
80 parts of PLA (polylactic acid),
8 parts of PBAT (poly (butylene adipate terephthalate)),
12 parts of thermoplastic starch.
(1) Placing PLA, PBAT and starch into vacuum drying at 80-100 ℃, and standing for 8-12 h. Weighing 20 parts of starch, a proper amount of 5 parts of polyhydric alcohols and oils (preferably the mass ratio of the two is 2: 1) as plasticizers, placing the plasticizers in an internal mixer at the temperature of 100 ℃ and 170 ℃, stirring the mixture for 10 to 15 minutes at the rotating speed of 50 to 80r/min, and grinding the product after the reaction is finished to finally obtain the thermoplastic starch.
(2) Weighing 95wt% of PLA/PBAT/thermoplastic starch polymer matrix, wherein the polymer matrix consists of 12 parts of thermoplastic starch, 80 parts of dried PLA and 8 parts of PBAT, then weighing 1wt% of polyethylene glycol compatibilizer and 3wt% of intumescent flame retardant, adding the mixture into a 160-180 ℃ internal mixer, stirring at the rotating speed of 50-80r/min for 10-15min, and grinding the product after stirring to be uniform to obtain the PLA/PBAT/thermoplastic starch composite flame retardant material with small particle size.
(3) After 99wt% of PLA/PBAT/thermoplastic starch composite flame retardant material and 1wt% of organic chemical foaming agent are uniformly mixed, the mixture is molded and foamed in a flat vulcanizing machine, wherein the molding temperature is 180-200 ℃, and the pressure is 5-8 MPa.
Example 2
The PLA/PBAT/thermoplastic starch composite foaming flame-retardant material in the embodiment is prepared from the following raw materials in percentage by weight:
84% of PLA/PBAT/thermoplastic starch matrix,
3 percent of compatibilizer,
3 percent of foaming agent,
10% of flame retardant.
Wherein the PLA/PBAT/thermoplastic starch matrix is prepared from the following components in parts by weight:
66 parts of PLA (polylactic acid),
16 parts of PBAT, namely PBAT, PBAT B,
and 18 parts of thermoplastic starch.
(1) Placing PLA, PBAT and starch into vacuum drying at 80-100 ℃, and standing for 8-12 h. Weighing 25 parts of starch, a proper amount of 8 parts of polyhydric alcohols and amides (preferably, the ratio of the polyhydric alcohols to the amides is 2: 1), placing the mixture in an internal mixer at the temperature of 100 ℃ and 170 ℃, stirring at the rotating speed of 50-80r/min for 10-15min, and grinding a product after the reaction is finished to finally obtain the thermoplastic starch.
(2) Weighing 84wt% of PLA/PBAT/thermoplastic starch polymer matrix, wherein the polymer matrix comprises 18 parts of thermoplastic starch, 66 parts of dried PLA and 16 parts of PBAT, then weighing 3wt% of polyethylene glycol compatibilizer and 10 wt% of intumescent flame retardant, adding the mixture into a 160-180 ℃ internal mixer, stirring at the rotating speed of 50-80r/min for 10-15min, and grinding the product after stirring to be uniform to obtain the PLA/PBAT/thermoplastic starch composite flame retardant material with small particle size.
(3) After 97wt% of PLA/PBAT/thermoplastic starch composite flame retardant material and 3wt% of organic chemical foaming agent are uniformly mixed, the PLA/PBAT/thermoplastic starch composite foaming material is molded and foamed in a flat vulcanizing machine, wherein the molding temperature is 180-200 ℃, and the pressure is 5-8 MPa.
Example 3
The PLA/PBAT/starch composite foaming flame-retardant material in the embodiment is prepared from the following raw materials in percentage by weight:
PLA/PBAT/thermoplastic starch matrix 74%,
5 percent of compatibilizer,
5 percent of foaming agent,
16% of flame retardant.
Wherein the PLA/PBAT/thermoplastic starch matrix is prepared from the following components in parts by weight:
55 parts of PLA (polylactic acid),
23 parts of PBAT, namely PBAT A,
and 22 parts of thermoplastic starch.
(1) Placing PLA, PBAT and starch into vacuum drying at 80-100 ℃, and standing for 8-12 h. Weighing 30 parts of starch, 10 parts of polyhydric alcohols and oils (preferably the mass ratio of the two is 2: 1) of plasticizer, placing the plasticizer in an internal mixer at the temperature of 100 ℃ and 170 ℃, stirring the mixture for 10 to 15 minutes at the rotating speed of 50 to 80r/min, and grinding the product after the reaction is finished to finally obtain the thermoplastic starch.
(2) Weighing 74wt% of PLA/PBAT/thermoplastic starch polymer matrix, wherein the polymer matrix comprises 22 parts of thermoplastic starch, 55 parts of dried PLA and 23 parts of PBAT, then weighing 5wt% of polyethylene glycol compatibilizer and 16wt% of intumescent flame retardant, adding the mixture into a 160-180 ℃ internal mixer, stirring at the rotating speed of 50-80r/min for 10-15min, and grinding the product after stirring to be uniform to obtain the PLA/PBAT/thermoplastic starch composite flame retardant material with small particle size.
(3) After 95wt% of PLA/PBAT/thermoplastic starch composite flame retardant material and 5wt% of organic chemical foaming agent are uniformly mixed, the polylactic acid/PBAT/thermoplastic starch composite foaming material is molded and foamed in a flat vulcanizing machine, wherein the molding temperature is 180-200 ℃, and the pressure is 5-8 MPa.
Comparative example 1
The PLA foaming flame-retardant material in the comparative example is prepared from the following raw materials in percentage by weight:
96 percent of PLA basal body,
3 percent of flame retardant,
1% of foaming agent.
(1) Placing PLA into vacuum drying at 80-100 ℃, and standing for 8-12 h.
(2) Weighing 96wt% of PLA polymer matrix and 3wt% of intumescent flame retardant, adding the PLA polymer matrix and the intumescent flame retardant into a 160-80 ℃ internal mixer, stirring at the rotating speed of 50-80r/min for 10-15min, and grinding the product after stirring uniformly to obtain the composite material with small particle size
(3) After 99wt% of PLA flame retardant material and 1wt% of organic chemical foaming agent are uniformly mixed, the polylactic acid flame retardant foaming material is molded and foamed in a flat vulcanizing machine, wherein the molding temperature is 180-200 ℃, and the pressure is 5-8 MPa.
Comparative example 2
The PLA/PBAT composite foaming flame-retardant material in the comparative example is prepared from the following raw materials in percentage by weight:
95 percent of PLA/PBAT matrix,
1 percent of compatibilizer,
3 percent of flame retardant,
1 percent of foaming agent,
wherein the PLA/PBAT substrate is prepared from the following components in parts by weight:
90 parts of PLA (polylactic acid),
10 parts of PBAT.
(1) Placing PLA and PBAT into vacuum drying at 80-100 ℃, and standing for 8-12 h.
(2) Weighing 95wt% of PLA/PBAT/polymer matrix, wherein the polymer matrix consists of 90 parts of dry PLA and 10 parts of dry PBAT, then weighing 1wt% of polyethylene glycol compatibilizer and 3wt% of intumescent flame retardant, adding the mixture into a 160-80 ℃ internal mixer, stirring for 10-15min at the rotating speed of 50-80r/min, and grinding the product after stirring to be uniform to obtain the composite material with small particle size
(3) After 99wt% of PLA/PBAT composite flame retardant material and 1wt% of organic chemical foaming agent are uniformly mixed, the PLA/PBAT composite foamed flame retardant material is molded and foamed in a flat vulcanizing machine, wherein the molding temperature is 180-200 ℃ and the pressure is 5-8 MPa.
Product performance testing
The main physical indexes of the flame-retardant foaming materials prepared in the embodiments 1-3 and the comparative examples 1-2 are tested according to related detection standards, wherein the test method comprises the following steps:
(1) and (3) testing tensile property: and (3) testing the tensile mechanical property of the injection molding sample strip by adopting an electronic universal tester according to GB/T1040.3-2006, setting the tensile rate to be 20mm/min, testing each group of samples for 3 times on average, and taking the average value as test data. The samples were tested for tensile strength.
(2) Limiting oxygen index test: the samples were tested according to GB/T2406.2-2009.
(3) And (3) testing the vertical burning grade: the material was tested according to standard GB/T2408-2008.
As can be seen from the comparison of comparative example 1 and comparative example 2 in the scale of fig. 1, the addition of PBAT toughens PLA, resulting in a decrease in tensile strength. Comparing comparative example 2 and example 1, it can be seen that the addition of plasticized starch also results in a decrease in tensile strength. Comparing example 1, example 2 and example 3, it can be seen that as the flame retardant content increases, the tensile strength decreases, but still has better tensile properties.
As can be seen from FIG. 2, no dripping phenomenon occurs after the flame retardant is added, and the flame retardant property is good.
The PLA/PBAT/thermoplastic starch composite flame-retardant foaming material keeps certain excellence in mechanical property, and the tested limit oxygen index ranges from 24.1% to 35.2%. The vertical burning grade test can reach V-0 grade at most, and the flame retardant effect is good.
In addition, in the case of the invention, for example, the pure PLA polymer matrix, the PLA/PBAT polymer matrix, and the PLA/PBAT/thermoplastic starch polymer matrix of the invention have small variation range of mechanical properties among the three, which indicates that the PLA/PBAT/thermoplastic starch composite flame retardant foam material has improved PLA toughness, improved PLA flame retardant property, and reduced cost under the condition of ensuring excellent mechanical properties of PLA. When the high flame retardant property is pursued, the prepared PLA/PBAT/thermoplastic starch composite flame retardant foaming material still achieves a certain excellent mechanical property, which shows that the mechanical property of the invention is excellent and stable.
Claims (9)
1. A polylactic acid/PBAT/thermoplastic starch composite foaming flame-retardant material is characterized in that: the composite foaming flame-retardant material comprises the following components in percentage by weight:
74% -95% of PLA/PBAT/thermoplastic starch matrix,
3 to 16 percent of flame retardant,
1 to 5 percent of compatibilizer,
1% -5% of foaming agent;
wherein the PLA/PBAT/thermoplastic starch matrix comprises the following components in parts by weight:
55-80 parts of PLA (polylactic acid),
8-23 parts of PBAT (poly (butylene adipate terephthalate)),
12-22 parts of thermoplastic starch.
2. The polylactic acid/PBAT/thermoplastic starch composite foaming flame-retardant material according to claim 1, characterized in that: the thermoplastic starch is obtained by plasticizing and modifying starch by a plasticizer.
3. The polylactic acid/PBAT/thermoplastic starch composite foaming flame-retardant material according to claim 2, characterized in that: the plasticizer is at least one of polyalcohol, amide and oil.
4. The polylactic acid/PBAT/thermoplastic starch composite foaming flame-retardant material according to claim 1, characterized in that: the compatibilizer is at least one of polyethylene glycol, an ADR chain extender and dicumyl peroxide.
5. The polylactic acid/PBAT/thermoplastic starch composite foaming flame-retardant material according to claim 1, characterized in that: the flame retardant is at least one of an intumescent flame retardant, a metal hydroxide flame retardant and a phosphorus flame retardant.
6. The polylactic acid/PBAT/thermoplastic starch composite foaming flame-retardant material according to claim 1, characterized in that: the foaming agent is at least one of an organic foaming agent, an inorganic foaming agent and a physical foaming agent.
7. The preparation method of the polylactic acid/PBAT/thermoplastic starch composite foaming flame-retardant material according to claim 1, characterized in that: the method comprises the following steps:
(1) placing PLA, PBAT and starch into vacuum drying at 80-100 ℃, and standing for 8-12 h; weighing 20-30 parts of starch and 5-10 parts of plasticizer, placing the starch and the plasticizer in an internal mixer at the temperature of 100-170 ℃, stirring at the rotating speed of 50-80r/min for 10-15min, and grinding a product after the reaction is finished to finally obtain thermoplastic starch;
(2) weighing 74-95 wt% of PLA/PBAT/thermoplastic starch polymer matrix, wherein the polymer matrix comprises 12-22 parts of thermoplastic starch, 55-80 parts of dried PLA and 8-23 parts of PBAT, then weighing 1-5wt% of compatibilizer and 3-16wt% of flame retardant, adding the mixture into a 160-180 ℃ internal mixer, stirring for 10-15min at the rotating speed of 50-80r/min, and grinding the product after stirring uniformly to obtain the PLA/PP/starch composite material with small particle size;
(3) after 95-99wt% of PLA/PP/starch composite material and 1-5wt% of chemical foaming agent are uniformly mixed, the polylactic acid/PBAT/thermoplastic starch composite foaming flame-retardant material is prepared by a forming method.
8. The preparation method of the polylactic acid/PBAT/thermoplastic starch composite foaming flame-retardant material according to claim 7, is characterized in that: molding methods include injection molding, extrusion, and compression molding of plastics.
9. The preparation method of the polylactic acid/PBAT/thermoplastic starch composite foaming flame-retardant material according to claim 8, is characterized in that: when the molding method is to mold the plastic, the polylactic acid/PBAT/starch composite foaming flame-retardant material is molded and foamed in a flat vulcanizing machine, wherein the molding temperature is 180-200 ℃, and the pressure is 5-8 MPa.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114891324A (en) * | 2022-04-26 | 2022-08-12 | 南京工业大学 | Flame-retardant modified material with cross-linked grid structure, and preparation method and application thereof |
| CN115725143A (en) * | 2022-12-20 | 2023-03-03 | 福州大学 | Degradable high-strength wear-resistant PVC (polyvinyl chloride) foam material and preparation method thereof |
| CN116082809A (en) * | 2022-11-11 | 2023-05-09 | 湖北犇星生物新材料有限公司 | Preparation method of degradable plastic |
| CN116102766A (en) * | 2022-12-05 | 2023-05-12 | 青岛科技大学 | Ultra-light high-flame-retardance biodegradable PLA foam and preparation process thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102134379A (en) * | 2011-02-24 | 2011-07-27 | 深圳市光华伟业实业有限公司 | Halogen-free antiflaming polylactic acid material and produciotn method of same |
| CN105860462A (en) * | 2015-01-23 | 2016-08-17 | 深圳王子新材料股份有限公司 | Polylactic acid based composite material and preparation method and application thereof |
| CN109593332A (en) * | 2018-12-14 | 2019-04-09 | 河南青源天仁生物技术有限公司 | Fully biodegradable foamed seedlings nursing plate and preparation method thereof suitable for machinery transplanting |
| CN110845830A (en) * | 2019-11-13 | 2020-02-28 | 青岛润兴塑料新材料有限公司 | Starch filled PLA/PBAT full-biodegradable composite material and preparation method thereof |
-
2021
- 2021-02-08 CN CN202110171406.6A patent/CN112898753A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102134379A (en) * | 2011-02-24 | 2011-07-27 | 深圳市光华伟业实业有限公司 | Halogen-free antiflaming polylactic acid material and produciotn method of same |
| CN105860462A (en) * | 2015-01-23 | 2016-08-17 | 深圳王子新材料股份有限公司 | Polylactic acid based composite material and preparation method and application thereof |
| CN109593332A (en) * | 2018-12-14 | 2019-04-09 | 河南青源天仁生物技术有限公司 | Fully biodegradable foamed seedlings nursing plate and preparation method thereof suitable for machinery transplanting |
| CN110845830A (en) * | 2019-11-13 | 2020-02-28 | 青岛润兴塑料新材料有限公司 | Starch filled PLA/PBAT full-biodegradable composite material and preparation method thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114891324A (en) * | 2022-04-26 | 2022-08-12 | 南京工业大学 | Flame-retardant modified material with cross-linked grid structure, and preparation method and application thereof |
| CN114891324B (en) * | 2022-04-26 | 2023-04-11 | 南京工业大学 | Flame-retardant modified material with cross-linked grid structure, and preparation method and application thereof |
| CN116082809A (en) * | 2022-11-11 | 2023-05-09 | 湖北犇星生物新材料有限公司 | Preparation method of degradable plastic |
| CN116102766A (en) * | 2022-12-05 | 2023-05-12 | 青岛科技大学 | Ultra-light high-flame-retardance biodegradable PLA foam and preparation process thereof |
| CN115725143A (en) * | 2022-12-20 | 2023-03-03 | 福州大学 | Degradable high-strength wear-resistant PVC (polyvinyl chloride) foam material and preparation method thereof |
| CN115725143B (en) * | 2022-12-20 | 2023-09-29 | 福州大学 | Degradable high-strength wear-resistant PVC (polyvinyl chloride) foaming material and preparation method thereof |
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