CN106832801B - A kind of lignin modification PBAT biodegradable plastic and preparation method thereof - Google Patents
A kind of lignin modification PBAT biodegradable plastic and preparation method thereof Download PDFInfo
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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
- 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
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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
- 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
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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
- C08J2497/00—Characterised by the use of lignin-containing materials
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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
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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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
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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
- C08L2205/05—Polymer mixtures characterised by other features containing polymer components which can react with one another
Abstract
The invention discloses a kind of preparation methods of lignin modification PBAT biodegradable plastic, comprising the following steps: (1) is dried in vacuo poly terephthalic acid/tetramethylene adipate, lignin respectively；(2) dried poly terephthalic acid/tetramethylene adipate, lignin and chain extender, antioxidant, plasticizer, lubricant, heat stabilizer are added in high mixer, is sufficiently mixed；(3) by gained mixed material through twin-screw extrusion machine extruding pelletization；(4) lignin-PBAT composite plastic grain is subjected to blown film at a certain temperature, lignin modification PBAT biodegradable plastic is made.The present invention using nature largely existing biomass lignin with PBAT is compound prepares biodegradable plastic, while meeting degradable requirement after composite modified, the mechanical property of pure PBAT resin is enhanced, and effectively reduces production cost, is allowed to be more advantageous to marketing.
Description
Technical field
The present invention relates to degradative plastics technical field more particularly to a kind of lignin modification PBAT biodegradable plastic and its
Preparation method.
Background technique
Currently, the consumption figure of plastic products is constantly increasing, and synthetic plastic is producing with the continuous development of national economy
It is played an increasingly important role in life.But can not degrade after being discarded due to most plastic products, it deposits for a long time
, constantly accumulation causes serious white pollution, and continuous with pollution is aggravated and the continuous enhancing of people's environmental consciousness,
Seeking a kind of plastic products for being not only able to satisfy people's use demand but also being able to satisfy ecological requirements seems more more and more urgent and causes
The broad interest of researcher, wherein degradable resin has become the heat of research due to its degradation characteristic and economic performance
Point,
Poly terephthalic acid/tetramethylene adipate (PBAT) is a kind of polyester material of complete biodegradable, in nature
Under the conditions of can by multiple-microorganism and animal and plant body enzyme dispersion metabolism, finally be degraded to water and carbon dioxide.Gather to benzene
Dioctyl phthalate/tetramethylene adipate has the characteristic of poly adipate succinic acid ester and poly terephthalic acid simultaneously, existing good
Ductility and elongation at break also have preferably heat resistance and shock resistance, substantially improve original binary polyester material
Performance.
Lignin be in a kind of unformed, molecular structure being widely present in plant containing oxo phenylpropanol or its
The armaticity high polymer of derivant structure unit.Since there is aromatic radicals for the molecular structure of lignin.Phenolic hydroxyl group, alcoholic extract hydroxyl group,
Carbon-based conjugated double bond isoreactivity group, thus can by oxidation, reduction, hydrolysis, alcoholysis, acidolysis methoxyl group, carboxyl, phthalein,
A variety of reactive modes such as sulfonation, alkylation, halogenation, polycondensation or graft copolymerization are modified.Lignin has preferable mechanics
Performance and wooden appearance attribute, while from biomass resource, simultaneously under composting conditions with degradability quickly
Can, it is a kind of following more environmentally protective material.
Summary of the invention
The object of the present invention is to provide a kind of lignin modification PBAT biodegradable plastics and preparation method thereof.
The present invention provides a kind of preparation methods of lignin modification PBAT biodegradable plastic, by biodegrade
Biological material lignin quality modified PBAT biodegradable plastic obtained after composite modified is introduced on the basis of material PBAT,
While meeting degradable requirement, the mechanical property of pure PBAT resin is enhanced, and effectively reduce this kind of plastics
Cost is obtained, is allowed to be more advantageous to marketing.
The present invention also provides a kind of lignin modification PBAT biodegradable plastics, pass through the various functional aids of addition
Synergy, can be effectively by the functionality of the reactive group on lignin surface and PBAT polymer segment on microcosmic
Group can be combined together, and macroscopically both materials are preferably being fused together to excellent wooden of processability
Plain modified PBAT biodegrade membrane material, is widely portable to the membrane materials such as shopping bag, refuse bag, mulch, awning film.
To achieve the above object, the invention adopts the following technical scheme:
The first aspect of the invention is to provide a kind of preparation method of lignin modification PBAT biodegradable plastic, including
Following steps:
(1) a certain amount of poly terephthalic acid/tetramethylene adipate, lignin are dried in vacuo respectively；
(2) dried poly terephthalic acid/tetramethylene adipate and lignin and chain extension are added in high mixer
Agent, antioxidant, plasticizer, lubricant, heat stabilizer after being sufficiently mixed, obtain mixed material；
(3) gained mixed material is obtained into lignin-PBAT composite plastic grain through double screw extruder extruding pelletization；
(4) lignin-PBAT composite plastic grain is subjected to blown film at a certain temperature, lignin modification PBAT is made
Biodegradable plastic.
Further, the poly terephthalic acid/tetramethylene adipate is poly- to be synthesized by petroleum-based feedstock route
Terephthalic acid (TPA)/tetramethylene adipate；Preferably, the raw material poly terephthalic acid/tetramethylene adipate uses Xinjiang
Poly terephthalic acid/tetramethylene adipate (PBAT) that the trade mark of Tun He company, Lanshan County production is 801T.
Further, lignin is original powder in the step (1), and partial size is 100~800 mesh；Its partial size is preferably 150
~600 mesh；Preferably 200~500 mesh；More preferably 300~400 mesh.
Further, the drying process in the step (1) are as follows: drying temperature is 25~40 DEG C, drying time 1.5h
~3h, vacuum degree are 0~5000Pa (absolute pressure)；Preferably, drying temperature be 28~36 DEG C, drying time be 2h~
2.5h, vacuum degree are 100~3000Pa (absolute pressure)；It is further preferable that drying temperature is 30~32 DEG C, drying time is
2.3h, vacuum degree are 1000~2000Pa (absolute pressure).
Further, in the step (2), the heat stabilizer in maleic anhydride, epoxidized soybean oil one
Kind；The lubricant is selected from one of calcium stearate, zinc stearate, oleamide series lubricant agent or two kinds or more mixtures；
The plasticizer is selected from tributyl citrate, triethyl citrate, acetyl tri-n-butyl citrate, triacetyl glycerine, the last of the ten Heavenly stems two
One of dibutyl phthalate or two kinds or more compound；The antioxidant is selected from butylated hydroxy anisole, butylated hydroxy-a
Benzene, butyl are to biphenol, phosphorous acid benzene diisodecyl ester, pentaerythritol bis-phosphite, 3- (3,5- di-t-butyl -4- hydroxy benzenes
Base) propionate, phosphorous acid three (2,4- di-tert-butyl-phenyl) ester, 3,5- di-tert-butyl-hydroxy phenyl propionic acid ten
One or more of caprylate compound；The chain extender is selected from hydroquinone two hydroxy ethyl ether, resorcinol two
One or more of hydroxyethyl ether, bisphenol-A, ethylene glycol, 1,4- butanediol, 1,6-HD, diethylene glycol compounding
Object.
Further, the mixing temperature of high mixer described in the step (3) be 100~110 DEG C, revolving speed be 800~
1000r/min, incorporation time are 10~20min.
Further, the extrusion temperature of double screw extruder is 120~190 DEG C in the step (3)；Preferably 130~
170℃；More preferably 140~160 DEG C.
Further, blown film temperature is 125~160 DEG C in the step (4)；Preferably 130~150 DEG C；More preferably
135~145 DEG C.
Further, in the preparation method of lignin modification PBAT biodegradable plastic, according to parts by weight, each original
Expect that consumption proportion is as follows:
Preferably, in the preparation method of lignin modification PBAT biodegradable plastic, according to parts by weight, each raw material
Consumption proportion is as follows:
Further, wherein the parts by weight of each raw material are 100% calculating, actual amount according to the effective content of raw material
It need to be converted according to the actually active content of raw material.
The second aspect of the invention is to provide a kind of lignin modification PBAT biodegrade using above method preparation
Plastics.
The third aspect of the invention is to provide the above-mentioned lignin modification PBAT biodegradable plastic of one kind and gives birth in preparation
Object is degraded shopping bag, refuse bag, mulch, the application in green house of vegetables film.
The present invention by adopting the above technical scheme, compared with prior art, has the following technical effect that
The lignin original powder that the method for the present invention is prepared by using the biomass being widely present from nature, to PBAT
Biodegradable resin is modified modification and lignin-PBAT composite biological degradation plastic is made, and can be widely used for shopping bag, rubbish
The membrane materials such as bag, mulch, awning film；The lignin-PBAT composite biological degradation plastic is relative to traditional pure PBAT resin system
For standby membrane material while equally solving white pollution, can effectively reducing petroleum based material, (raw material of PBAT is to benzene two
Formic acid, adipic acid, butanediol are all made of petroleum refining) consumption, and effectively improve the mechanical property of membrane material；
Raw material of the present invention are cheap and easy to get, and preparation process is simple, easy to operate, and production cost is low, are conducive to marketing.
Specific embodiment
The present invention is described in more detail below by specific embodiment, for a better understanding of the present invention,
But following embodiments are not intended to limit the scope of the invention.
The preparation of 1 lignin modification PBAT biodegradable plastic of embodiment
(1) according to parts by weight, each raw material dosage proportion of use is as follows:
(2) specific preparation method, comprising the following steps:
(1) a certain amount of PBAT, lignin powder (150 mesh) are dried to 2.5h under the conditions of 25 DEG C, 0~5000Pa；
(2) dried PBAT, lignin powder and bisphenol-A, dibutyl hydroxy toluene, citric acid are added in high mixer
Triethyl, epoxidized soybean oil, zinc stearate, control temperature of charge are 100-105 DEG C, are mixed 15 minutes, revolving speed 900r/min；
(3) gained mixed material is passed through into double screw extruder extruding pelletization, control extrusion temperature is 120~140 DEG C, system
Obtain lignin-PBAT composite plastic particle；
(4) lignin-PBAT composite plastic is passed through into blown film, control blown film temperature is 125~130 DEG C, is made various
Lignin modification PBAT biodegradable plastic.
The preparation of 2 lignin modification PBAT biodegradable plastic of embodiment
(1) according to parts by weight, each raw material dosage proportion of use is as follows:
(2) specific preparation method, comprising the following steps:
(1) a certain amount of PBAT, lignin (150 mesh) are dried to 3h under the conditions of 25 DEG C, 0~5000Pa；
(2) dried PBAT, lignin and acetyl tri-n-butyl citrate, resorcinol two are added in high mixer
To biphenol, epoxidized soybean oil, calcium stearate, controlling temperature of charge is 110 DEG C, is mixed 20 minutes, revolving speed for hydroxyethyl ether, butyl
For 1000r/min；
(3) gained mixed material is passed through into double screw extruder extruding pelletization, control extrusion temperature is 130~150 DEG C, system
Obtain lignin-PBAT composite plastic particle；
(4) lignin-PBAT composite plastic is passed through into blown film, control blown film temperature is 135~140 DEG C, is made various
Lignin modification PBAT biodegradable plastic.
The preparation of 3 lignin modification PBAT biodegradable plastic of embodiment
(1) according to parts by weight, each raw material dosage proportion of use is as follows:
(2) specific preparation method, comprising the following steps:
(1) a certain amount of PBAT, lignin (200 mesh) are dried to 3h under the conditions of 25 DEG C, 0~5000Pa；
(2) PBAT, lignin, maleic anhydride, triacetyl glycerine, butyl pair after drying is added in high mixer
Biphenol, 1,4-butanediol, zinc stearate, control temperature of charge are 105 DEG C, are mixed 25 minutes, revolving speed 1000r/min；
(3) gained mixed material is passed through into double screw extruder extruding pelletization, control extrusion temperature is 150~160 DEG C, system
Obtain lignin-PBAT composite plastic particle；
(4) lignin-PBAT composite plastic is passed through into blown film, control blown film temperature is 140~150 DEG C, is made various
Lignin modification PBAT biodegradable plastic.
The preparation of 4 lignin modification PBAT biodegradable plastic of embodiment
(1) according to parts by weight, each raw material dosage proportion of use is as follows:
(2) specific preparation method, comprising the following steps:
(1) a certain amount of PBAT, lignin (300 mesh) are dried to 3h under the conditions of 25 DEG C, 0~5000Pa；
(2) PBAT, lignin, triacetyl glycerine, bisphenol-A, the phosphorous acid benzene two after drying is added in high mixer are different
Last of the ten Heavenly stems ester, epoxidized soybean oil, zinc stearate, control temperature of charge are 105 DEG C, are mixed 25 minutes, revolving speed 800r/min；
(3) gained mixed material is passed through into double screw extruder extruding pelletization, control extrusion temperature is 185~190 DEG C, system
Obtain lignin-PBAT composite plastic particle；
(4) lignin-PBAT composite plastic is passed through into blown film, control blown film temperature is 130~135 DEG C, is made various
Lignin modification PBAT biodegradable plastic.
Unmodified Xinjiang Lanshan County is collected poly terephthalic acid/tetramethylene adipate of river trade mark 801T by comparative example 1
(PBAT) as a comparison case 1.
Performance test
Using universal electrical tensile testing machine (SUN500 type is manufactured by Italian GALDABINI company) to above-mentioned implementation
Example 1-4, the tensile strength of 1 material of comparative example, elongation at break are measured, and according to national standard GB/T16716.7-2012 standard
Biological compost degradation experiment is carried out to above-mentioned material, specific testing result is as shown in table 1:
Each performance applications test data of 1 Examples 1 to 4 of table and comparative example 1
| Tensile strength/MPa | Elongation at break/% | 6 months compost degradation rate % | |
| Embodiment 1 | 30 | 330 | 99 |
| Embodiment 2 | 35 | 328 | 98 |
| Embodiment 3 | 38 | 335 | 98 |
| Embodiment 4 | 40 | 340 | 97 |
| Comparative example 1 | 23 | 332 | 99 |
By in above-mentioned table 1 using test result it can be seen that with the non-modified pure poly terephthalic acid of degradable material/
Tetramethylene adipate comparative example 1 is compared, by the Examples 1 to 4 of lignin modification the case where degradation property is basically unchanged
Under, there is promotion in mechanical property by the PBAT of lignin modification, the growth rate of tensile strength is respectively 30.4%,
52.2%, 65.2% and 73.9%, it has obtained enhancing significantly；Wherein with lignin known to above-mentioned tensile strength enhancing rate
The increase of content, this enhancing are more and more obvious.Therefore, lignin modification PBAT biodegradable plastic produced by the present invention is according with
While closing degradable requirement, the mechanical property of pure PBAT resin is effectively enhanced, and reduce production cost, be allowed to more
Be conducive to marketing, relatively existing unmodified pure poly terephthalic acid/tetramethylene adipate has apparent technology
Advantage.
Specific embodiments of the present invention are described in detail above, but it is merely an example, the present invention is simultaneously unlimited
It is formed on particular embodiments described above.To those skilled in the art, any couple of present invention carries out equivalent modifications and
Substitution is also all among scope of the invention.Therefore, without departing from the spirit and scope of the invention made by equal transformation and
Modification, all should be contained within the scope of the invention.
Claims (7)
1. a kind of preparation method of lignin modification PBAT biodegradable plastic, which comprises the following steps:
(1) a certain amount of poly terephthalic acid/tetramethylene adipate, lignin are dried in vacuo respectively；
(2) dried poly terephthalic acid/tetramethylene adipate and lignin and chain extender are added in high mixer, resists
Oxidant, plasticizer, lubricant, heat stabilizer after being sufficiently mixed, obtain mixed material；
(3) gained mixed material is obtained into lignin-PBAT composite plastic grain through double screw extruder extruding pelletization；
(4) lignin-PBAT composite plastic grain is subjected to blown film at a certain temperature, lignin modification PBAT biology is made
Degradative plastics；
In the step (2), the heat stabilizer is selected from one of maleic anhydride, epoxidized soybean oil；The lubricant
Selected from one of calcium stearate, zinc stearate, oleamide series lubricant agent or two kinds or more mixtures；The plasticizer is selected from
Tributyl citrate, triethyl citrate, acetyl tri-n-butyl citrate, triacetyl glycerine, one in dibutyl sebacate
Kind or two kinds or more compounds；The antioxidant is selected from butylated hydroxy anisole, dibutyl hydroxy toluene, butyl to hexichol
Phenol, phosphorous acid benzene diisodecyl ester, pentaerythritol bis-phosphite, 3- (3,5- di-tert-butyl-hydroxy phenyl) propionic acid Ji Wusi
Alcohol ester, phosphorous acid three (2,4- di-tert-butyl-phenyl) ester, one in 3,5- di-tert-butyl-hydroxy phenyl propionic acid, ten caprylate
Kind or two or more compounds；The chain extender be selected from hydroquinone two hydroxy ethyl ether, resorcinol dihydroxyethyl ether, bisphenol-A,
One or more of ethylene glycol, 1,4- butanediol, 1,6-HD, diethylene glycol compound；
Blown film temperature is 125~160 DEG C in the step (4)；
The preparation method, according to parts by weight, each raw material dosage proportion are as follows:
2. preparation method according to claim 1, which is characterized in that the poly terephthalic acid/tetramethylene adipate
For the poly terephthalic acid/tetramethylene adipate synthesized by petroleum-based feedstock route.
3. preparation method according to claim 1, which is characterized in that in the step (1) partial size of lignin be 100~
800 mesh.
4. preparation method according to claim 1, which is characterized in that the drying process in the step (1) are as follows: dry temperature
Degree is 25~40 DEG C, and drying time is 1.5h~3h, and vacuum degree is 0~5000Pa.
5. preparation method according to claim 1, which is characterized in that the extrusion of double screw extruder in the step (3)
Temperature is 120~190 DEG C.
6. a kind of lignin modification PBAT biodegradable plastic of preparation method preparation as described in any one in claim 1-5.
7. a kind of lignin modification PBAT biodegradable plastic as claimed in claim 6 is preparing biodegradable shopping bag, rubbish
Rubbish bag, mulch, the application in green house of vegetables film.
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| CN107141826A (en) * | 2017-07-05 | 2017-09-08 | 江苏旭华圣洛迪建材有限公司 | A kind of degradable lignin-base composite and preparation method thereof |
| CN108485207A (en) * | 2018-02-13 | 2018-09-04 | 南京工业大学 | A kind of degradable mulch and preparation method thereof with slow-release phosphate fertilizer |
| CN108359224A (en) * | 2018-02-13 | 2018-08-03 | 南京工业大学 | A kind of degradable mulch and preparation method thereof with slow-release nitrogen fertilizer |
| CN109735067A (en) * | 2018-09-25 | 2019-05-10 | 北京林业大学 | A kind of lignin-base biodegradable plastics and preparation method thereof |
| CN109535667A (en) * | 2018-11-01 | 2019-03-29 | 刘辉 | A kind of biology base degradative tableware |
| CN109943039A (en) * | 2019-02-15 | 2019-06-28 | 北京林业大学 | A kind of methylation lignin/PBAT biodegradable plastics and preparation method thereof |
| CN111978692A (en) * | 2020-09-11 | 2020-11-24 | 苏州威瑞成新材料有限公司 | Degradable plastic and preparation method thereof |
| CN112280265B (en) * | 2020-10-30 | 2021-12-10 | 南京工业大学 | Application of lignin in preparation of degradable foaming packaging material |
| CN112662148A (en) * | 2020-12-28 | 2021-04-16 | 常熟市沈氏塑业有限公司 | Degradable plastic for blow-molded bottle and preparation method thereof |
| CN113248879B (en) * | 2021-05-07 | 2024-03-12 | 湖北三宁碳磷基新材料产业技术研究院有限公司 | Lotus leaf modified poly (adipic acid)/butylene terephthalate composite material and preparation method thereof |
| CN113402857B (en) * | 2021-06-09 | 2022-08-12 | 华南理工大学 | Lignin/PBAT composite material and preparation method and application thereof |
| CN113881195A (en) * | 2021-09-30 | 2022-01-04 | 宜宾天亿新材料科技有限公司 | Biodegradable resin composition and preparation method thereof |
| CN113831518B (en) * | 2021-11-15 | 2022-04-12 | 中核华纬工程设计研究有限公司 | Method for modifying PBAT (poly (butylene adipate-co-terephthalate)) by using small-molecular phenol |
| CN114213816A (en) * | 2022-01-13 | 2022-03-22 | 周元康 | Green environment-friendly degradable plastic and preparation method thereof |
| CN114479387A (en) * | 2022-03-18 | 2022-05-13 | 深圳市明星盛包装集团有限公司 | Environment-friendly degradable plastic and preparation method thereof |
| CN116102854B (en) * | 2022-12-13 | 2023-08-04 | 湖北宜化降解新材料有限公司 | Preparation method of polybutylene adipate-terephthalate with high lignin content |
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| CN105838047A (en) * | 2016-05-20 | 2016-08-10 | 高陈堰 | Biodegradable modified lignin particles and production method thereof |
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