CN115418090A - Lignin-based flame-retardant biodegradable polylactic acid film - Google Patents
Lignin-based flame-retardant biodegradable polylactic acid film Download PDFInfo
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- CN115418090A CN115418090A CN202211192481.1A CN202211192481A CN115418090A CN 115418090 A CN115418090 A CN 115418090A CN 202211192481 A CN202211192481 A CN 202211192481A CN 115418090 A CN115418090 A CN 115418090A
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- lignin
- polylactic acid
- film
- based flame
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- 229920005610 lignin Polymers 0.000 title claims abstract description 27
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 239000003063 flame retardant Substances 0.000 title claims abstract description 18
- 229920006381 polylactic acid film Polymers 0.000 title claims abstract description 18
- 239000007822 coupling agent Substances 0.000 claims abstract description 25
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 18
- 239000004917 carbon fiber Substances 0.000 claims abstract description 18
- 239000000835 fiber Substances 0.000 claims abstract description 18
- 239000011347 resin Substances 0.000 claims abstract description 15
- 229920005989 resin Polymers 0.000 claims abstract description 15
- FHVDTGUDJYJELY-UHFFFAOYSA-N 6-{[2-carboxy-4,5-dihydroxy-6-(phosphanyloxy)oxan-3-yl]oxy}-4,5-dihydroxy-3-phosphanyloxane-2-carboxylic acid Chemical compound O1C(C(O)=O)C(P)C(O)C(O)C1OC1C(C(O)=O)OC(OP)C(O)C1O FHVDTGUDJYJELY-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229940072056 alginate Drugs 0.000 claims abstract description 12
- 229920000615 alginic acid Polymers 0.000 claims abstract description 12
- 235000010443 alginic acid Nutrition 0.000 claims abstract description 12
- 229920000747 poly(lactic acid) Polymers 0.000 claims abstract description 11
- 239000000654 additive Substances 0.000 claims abstract description 10
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000004626 polylactic acid Substances 0.000 claims abstract description 10
- 229920002472 Starch Polymers 0.000 claims abstract description 8
- 235000019698 starch Nutrition 0.000 claims abstract description 8
- 239000008107 starch Substances 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 12
- 229920003023 plastic Polymers 0.000 claims description 12
- 239000004033 plastic Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 241001474374 Blennius Species 0.000 claims description 6
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 6
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 6
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical group [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 6
- 229910052749 magnesium Inorganic materials 0.000 claims description 6
- 239000011777 magnesium Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 229910052726 zirconium Inorganic materials 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000010096 film blowing Methods 0.000 claims description 3
- 238000009775 high-speed stirring Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 230000000979 retarding effect Effects 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 2
- 230000015556 catabolic process Effects 0.000 abstract description 2
- 238000006731 degradation reaction Methods 0.000 abstract description 2
- 229910052760 oxygen Inorganic materials 0.000 abstract description 2
- 239000001301 oxygen Substances 0.000 abstract description 2
- 231100000167 toxic agent Toxicity 0.000 abstract description 2
- 239000003440 toxic substance Substances 0.000 abstract description 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000010102 injection blow moulding Methods 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000003340 retarding agent Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
Classifications
-
- 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
- C08J2300/00—Characterised by the use of unspecified polymers
- C08J2300/16—Biodegradable polymers
-
- 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
- C08J2367/04—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
- C08J2400/00—Characterised by the use of unspecified polymers
- C08J2400/16—Biodegradable polymers
-
- 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
- C08J2403/00—Characterised by the use of starch, amylose or amylopectin or of their derivatives or degradation products
- C08J2403/02—Starch; Degradation products thereof, e.g. dextrin
-
- 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
- C08J2405/00—Characterised by the use of polysaccharides or of their derivatives not provided for in groups C08J2401/00 or C08J2403/00
- C08J2405/04—Alginic acid; Derivatives thereof
-
- 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
- C08J2497/00—Characterised by the use of lignin-containing materials
-
- 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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/06—Elements
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Biological Depolymerization Polymers (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a lignin-based flame-retardant biodegradable polylactic acid film, which comprises fifteen percent of lignin, forty-five percent of polylactic acid, fifteen percent of resin, ten percent of alginate fiber, eight percent of carbon fiber, two percent of coupling agent and five percent of various additives; according to the invention, through placing the completely opened and uniformly mixed alginate fibers and carbon fibers, firstly, the limit oxygen index of the alginate fibers is forty-five percent, and the carbon fibers have good high-temperature-resistant and friction-resistant effects, so that the effective flame-retardant effect can be achieved, the integral tensile strength of the film can be greatly improved, meanwhile, the integral toughness of the film is increased, fifteen parts of biodegradable starch resin is added, the degradation capability is improved, the integral flexibility of the film can be effectively increased, the film can be easily dyed, and no redundant toxic substance can be generated even if the film is burnt in a large flame.
Description
Technical Field
The invention relates to the technical field of polylactic acid films, in particular to a lignin-based flame-retardant biodegradable polylactic acid film.
Background
Polylactic acid is also called polylactide, which is a polyester polymer obtained by polymerizing lactic acid as a main raw material, is a novel biodegradable material, has good thermal stability and good solvent resistance, and can be processed in various modes, such as extrusion, spinning, biaxial stretching and injection blow molding; the product made of polylactic acid can be biodegraded, and has good biocompatibility, glossiness, transparency, hand feeling and heat resistance.
The film prepared by adding the lignin-based flame-retardant material into the polylactic acid has a certain flame-retardant and fireproof effect, can be degraded well, and is not easy to pollute the environment during use.
However, when the existing polylactic acid film is used, the structural strength of the film is low, the film is easy to be pulled and cracked, and the film is not durable enough, so that the practicability is greatly reduced during use, and the flame retardant effect is not high.
Disclosure of Invention
The invention aims to provide a lignin-based flame-retardant biodegradable polylactic acid film to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a lignin-based flame-retardant biodegradable polylactic acid film comprises the following substances in parts by weight: fifteen percent of lignin, forty-five percent of polylactic acid, fifteen percent of resin, ten percent of alginate fiber, eight percent of carbon fiber, two percent of coupling agent and five percent of various additives.
As a further scheme of the invention: the lignin is granular lignin with the diameter of ten to thirty microns.
As a still further scheme of the invention: the resin is biodegradable starch resin.
As a still further scheme of the invention: the coupling agent is selected from zirconium coupling agent or magnesium coupling agent and tin coupling agent.
As a still further scheme of the invention: the additives comprise various preparations such as plasticizing, flame retarding and the like.
As a still further scheme of the invention: the preparation method comprises the following steps:
firstly, placing fifteen parts of lignin with the diameter of ten to thirty microns, fifteen parts of biodegradable starch resin, forty-five parts of polylactic acid, two parts of zirconium coupling agent or magnesium coupling agent and tin coupling agent and various additives into a heating and stirring kettle, heating at a high speed and stirring for fifty to eighty minutes, wherein the heating temperature is controlled between eighty and ninety degrees centigrade;
simultaneously placing ten percent of seaweed fiber and eight percent of carbon fiber into an opener for opening till the seaweed fiber and the carbon fiber are completely mixed;
completely opening and uniformly mixing the alginate fibers and the carbon fibers, placing the completely opened and uniformly mixed alginate fibers and the carbon fibers into the stirred and mixed primary mixture, stopping heating, extracting air in the stirring kettle by a compressor, and simultaneously carrying out secondary high-speed stirring, wherein the secondary stirring time is controlled to be between one hour and two hours, and the specific time can be properly adjusted according to the mixing condition;
putting the completely and uniformly mixed mixture into a double-screw extruder for melting, extruding, cutting and granulating to obtain original plastic particles;
and then placing the original plastic particles into a film blowing machine to heat and melt the plastic particles, blowing the plastic particles into a film, and finally rolling the film to obtain the polylactic acid film.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the completely opened and uniformly mixed alginate fibers and carbon fibers are placed, firstly, the limit oxygen index of the alginate fibers is forty-five percent, and the carbon fibers have good high-temperature-resistant and anti-friction effects, so that an effective flame-retardant effect can be achieved, the integral tensile strength of the film can be greatly improved, and the integral toughness of the film is increased.
2. Fifteen parts of biodegradable starch resin is added, so that the degradation capability is improved, the integral flexibility of the film can be effectively improved, the film can be dyed more easily, and no redundant toxic substance can be generated even if the film is burnt in a large flame.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the embodiment of the invention, the lignin-based flame-retardant biodegradable polylactic acid film comprises fifteen percent of lignin, forty-five percent of polylactic acid, fifteen percent of resin, ten percent of alginate fiber, eight percent of carbon fiber, two percent of coupling agent and five percent of various additives.
The lignin is granular lignin with the diameter of ten to thirty micrometers, and the resin is biodegradable starch resin.
The coupling agent is selected from zirconium coupling agents or magnesium coupling agents and tin coupling agents, and the additives comprise various preparations such as plasticizing agents, flame retarding agents and the like.
The working principle of the invention is as follows: firstly, placing fifteen parts of lignin with the diameter of ten to thirty microns, fifteen parts of biodegradable starch resin, forty-five parts of polylactic acid, two parts of zirconium coupling agent or magnesium coupling agent and tin coupling agent and various additives into a heating and stirring kettle, heating at a high speed and stirring for fifty to eighty minutes, wherein the heating temperature is controlled between eighty and ninety degrees centigrade; simultaneously placing ten percent of seaweed fiber and eight percent of carbon fiber into an opener for opening till the seaweed fiber and the carbon fiber are completely mixed; completely opening and uniformly mixing the alginate fibers and the carbon fibers into the stirred and mixed primary mixture, stopping heating, extracting air in the stirring kettle by a compressor, and simultaneously carrying out secondary high-speed stirring, wherein the secondary stirring time is controlled between one hour and two hours, and the specific time can be properly adjusted according to the mixing condition; putting the completely and uniformly mixed mixture into a double-screw extruder for melting, extruding, cutting and granulating to obtain original plastic particles; and then placing the original plastic particles into a film blowing machine to heat and melt the plastic particles, blowing the plastic particles into a film, and finally rolling the film to obtain the polylactic acid film.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it is to be understood that all embodiments may be combined as appropriate by one of ordinary skill in the art to form other embodiments as will be apparent to those of skill in the art from the description herein.
Claims (6)
1. A lignin-based flame-retardant biodegradable polylactic acid film is characterized by comprising the following substances in parts by weight: fifteen percent of lignin, forty-five percent of polylactic acid, fifteen percent of resin, ten percent of alginate fiber, eight percent of carbon fiber, two percent of coupling agent and five percent of various additives.
2. The lignin-based flame retardant biodegradable polylactic acid film according to claim 1, wherein the lignin is selected from grain-packaged lignin with a diameter of ten to thirty microns.
3. The lignin-based flame-retardant biodegradable polylactic acid film according to claim 1, wherein the resin is biodegradable starch resin.
4. The lignin-based flame-retardant biodegradable polylactic acid film according to claim 1, wherein the coupling agent is selected from zirconium-based coupling agents or magnesium-based coupling agents and tin-based coupling agents.
5. The lignin-based flame retardant biodegradable polylactic acid film according to claim 1, wherein the additives are various agents for plasticizing and flame retarding.
6. The lignin-based flame-retardant biodegradable polylactic acid film according to claim 1, wherein the preparation method comprises the following steps:
s1: firstly, placing fifteen parts of lignin with the diameter of ten to thirty microns, fifteen parts of biodegradable starch resin, forty-five parts of polylactic acid, two parts of zirconium coupling agent or magnesium coupling agent and tin coupling agent and various additives into a heating and stirring kettle, heating at a high speed and stirring for fifty to eighty minutes, wherein the heating temperature is controlled between eighty and ninety degrees centigrade;
s2: simultaneously placing ten percent of seaweed fiber and eight percent of carbon fiber into an opener for opening till the seaweed fiber and the carbon fiber are completely mixed;
s3: completely opening and uniformly mixing the alginate fibers and the carbon fibers into the stirred and mixed primary mixture, stopping heating, extracting air in the stirring kettle by a compressor, and simultaneously carrying out secondary high-speed stirring, wherein the secondary stirring time is controlled between one hour and two hours, and the specific time can be properly adjusted according to the mixing condition;
s4: putting the completely and uniformly mixed mixture into a double-screw extruder for melting, extruding, cutting and granulating to obtain original plastic particles;
s5: and then placing the original plastic particles into a film blowing machine to heat and melt the plastic particles, blowing the plastic particles into a film, and finally rolling the film to obtain the polylactic acid film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211192481.1A CN115418090A (en) | 2022-09-28 | 2022-09-28 | Lignin-based flame-retardant biodegradable polylactic acid film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211192481.1A CN115418090A (en) | 2022-09-28 | 2022-09-28 | Lignin-based flame-retardant biodegradable polylactic acid film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115418090A true CN115418090A (en) | 2022-12-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211192481.1A Pending CN115418090A (en) | 2022-09-28 | 2022-09-28 | Lignin-based flame-retardant biodegradable polylactic acid film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115418090A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107841102A (en) * | 2016-09-20 | 2018-03-27 | 黑龙江鑫达企业集团有限公司 | A kind of biodegradable toughness reinforcing heat-proof polylactic acid modified resin and preparation method thereof |
| CN109181247A (en) * | 2018-08-31 | 2019-01-11 | 南京工业大学 | Modified lignin composite biodegradable film and preparation method thereof |
| CN109265945A (en) * | 2018-09-21 | 2019-01-25 | 长春云创空间科技有限公司 | Natural fiber lactic acid composite material and preparation method thereof |
| CN109438944A (en) * | 2018-11-30 | 2019-03-08 | 万卓（武汉）新材料有限公司 | A kind of alginate fibre composite strengthening degradation plastic bottle and preparation method thereof |
| WO2020036638A1 (en) * | 2018-08-13 | 2020-02-20 | Wisys Technology Foundation, Inc. | Polylactic acid and lignin composite thermoplastic for 3d printing |
| CN110878168A (en) * | 2019-11-15 | 2020-03-13 | 湖南骏泰新材料科技有限责任公司 | Lignin-based biodegradable polylactic acid film and preparation method thereof |
| CN110964301A (en) * | 2019-11-15 | 2020-04-07 | 湖南骏泰新材料科技有限责任公司 | Lignin-based flame-retardant biodegradable polylactic acid film and preparation method thereof |
-
2022
- 2022-09-28 CN CN202211192481.1A patent/CN115418090A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107841102A (en) * | 2016-09-20 | 2018-03-27 | 黑龙江鑫达企业集团有限公司 | A kind of biodegradable toughness reinforcing heat-proof polylactic acid modified resin and preparation method thereof |
| WO2020036638A1 (en) * | 2018-08-13 | 2020-02-20 | Wisys Technology Foundation, Inc. | Polylactic acid and lignin composite thermoplastic for 3d printing |
| CN109181247A (en) * | 2018-08-31 | 2019-01-11 | 南京工业大学 | Modified lignin composite biodegradable film and preparation method thereof |
| CN109265945A (en) * | 2018-09-21 | 2019-01-25 | 长春云创空间科技有限公司 | Natural fiber lactic acid composite material and preparation method thereof |
| CN109438944A (en) * | 2018-11-30 | 2019-03-08 | 万卓（武汉）新材料有限公司 | A kind of alginate fibre composite strengthening degradation plastic bottle and preparation method thereof |
| CN110878168A (en) * | 2019-11-15 | 2020-03-13 | 湖南骏泰新材料科技有限责任公司 | Lignin-based biodegradable polylactic acid film and preparation method thereof |
| CN110964301A (en) * | 2019-11-15 | 2020-04-07 | 湖南骏泰新材料科技有限责任公司 | Lignin-based flame-retardant biodegradable polylactic acid film and preparation method thereof |
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Application publication date: 20221202 |