CN102702580A - Full-biodegradable starch-base in-situ fiber reinforced composite material and preparation method thereof - Google Patents
Full-biodegradable starch-base in-situ fiber reinforced composite material and preparation method thereof Download PDFInfo
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- CN102702580A CN102702580A CN2012102317695A CN201210231769A CN102702580A CN 102702580 A CN102702580 A CN 102702580A CN 2012102317695 A CN2012102317695 A CN 2012102317695A CN 201210231769 A CN201210231769 A CN 201210231769A CN 102702580 A CN102702580 A CN 102702580A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/12—Making granules characterised by structure or composition
- B29B9/14—Making granules characterised by structure or composition fibre-reinforced
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/58—Component parts, details or accessories; Auxiliary operations
- B29B7/72—Measuring, controlling or regulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
- B29B7/7461—Combinations of dissimilar mixers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/80—Component parts, details or accessories; Auxiliary operations
- B29B7/88—Adding charges, i.e. additives
- B29B7/90—Fillers or reinforcements, e.g. fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/12—Making granules characterised by structure or composition
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/04—Particle-shaped
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
- B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
- B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/9258—Velocity
- B29C2948/9259—Angular velocity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92885—Screw or gear
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92895—Barrel or housing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention discloses a full-biodegradable starch-based in-situ fiber reinforced composite material and a preparation method thereof. The starch-based full-biodegradable in-situ fiber reinforced composite material comprises the components in parts by weight: 60-80 parts of natural starch, 15-25 parts of plasticizer, 5-20 parts of fiber-forming resin and 0.5-2 parts of compatibilizer. The preparation method comprises the three steps of: mixing the natural starch, the plasticizer and the fiber-forming resin with the compatibilizer for 20-30 minutes at high speed according to a certain ratio; carrying out melt blending and extrusion in a double-screw extruder with an extrusion temperature of 145-190 DEG C, an extrusion die temperature of 130-170 DEG C and a screw rotation speed of 20-40 r/min; and cooling in natural air; and pelletizing to prepare the starch-based in-situ fiber reinforced composite material. The full-biodegradable starch-based in-situ fiber reinforced composite material contains thermoplastic starch as high as over 80% and has good processing property and application performance.
Description
Technical field
The present invention relates to starch-based composite material, particularly full biodegradable starch base original position fibre reinforced composites and preparation method thereof.
Background technology
The native starch source is abundant, and low price is renewable, and in numerous biomass-based high molecular degradable materials, the research of starch-based bio degradation material gains a special interest.The starch-based bio degradation material can be by biological degradation under multiple environment, and eventual degradation product carbonic acid gas and water can carry out recycling through photosynthesis, can not produce any pollution to environment.For many years; Both at home and abroad the research of starch-base biodegradation material is paid much attention to; But pure thermoplastic starch material mechanical property is too poor; Can't use separately, need carry out blend or composite modified, just can prepare the starch-based bio degradation material that has with the similar physicochemical property of general-purpose plastics with other artificial synthesized degradable macromolecular materials.But the cost of synthetic degradable macromolecule is higher, has limited applying of starch-based material.At present, the addition that how to reduce synthetic degradable macromolecule in the starch-based material has become a big focus of starch-base biodegradation material area research.
Fiber reinforcement is a kind of very general method in the polymer modification.In view of traditional inorganic or organic macroscopic fiber is joined can make the processing viscosity of matrix material sharply increase and increase the abrasion to processor in the resin matrix, a kind of enhancing mode of in-situ fibrillation has caused people's attention.In-situ Composite is meant two kinds of limited polymkeric substance of consistency in the melt blending process, and disperse phase is because of receiving shearing, the distortion of stretching action streamwise, orientation, and original position forms fiber, the matrix material of gained in matrix.The mechanism of in-situ fibrillation is: emulsion dispersant liquid drop when leaving standstill can keep spherical under interface interaction, and the trend of distortion, orientation is then arranged in flowing.When the limited two kinds of polymer melt blend of consistency, situation and emulsion are similar, disperse when leaving standstill to meet to keep the form of spheroidal particle, and when effects such as having born shearing, stretching takes place to flow, and disperse the spherolite friend shape orientation that changes.Since the entanglement characteristic between macromole, macromolecule drop can be as small molecules easy breaking, its largest deformation value can be very big, thereby can form the bigger fento of length-to-diameter ratio.In-situ fibrillation dimension compounding technology launches in the research of synthetic polymeric material field at present, but in the starch-base biodegradation material field, original position is combined into fine technology and also is not employed.The contained thermoplastic starch of the full biodegradable starch base original position fibre reinforced composites of the present invention preparation is up to more than 80%, and has better machining property and application performance.
Summary of the invention
The purpose of this invention is to provide a kind of full biodegradable starch base original position fibre reinforced composites and preparation method thereof; For reducing the content of synthetic degradable macromolecule; Preparation is low-cost; Processing characteristics, application performance are good, the novel full biodegradable starch-based material that can be in large-scale application.
Technical scheme of the present invention is:
A kind of full biodegradable starch base original position fibre reinforced composites is characterized in that the weight part of its component and each component is: 60～80 parts of native starches, 15～25 parts in softening agent, 5～20 parts of fiberized resins of one-tenth, 0.5～2 part of expanding material.
A kind of method for preparing full biodegradable starch base original position fibre reinforced composites is characterized in that, the steps include:
The first step, batching premix: get 60～80 parts of native starches, 15～25 parts in softening agent, become 5～20 parts of fiberized resins, 0.5～2 part of expanding material, stirring and evenly mixing 20～30 min in high-speed mixer by weight proportioning;
Second step, the melt blending granulation: the batching after the Preblend is placed the twin screw extruder melt blending and extrudes, 145～190 ℃ of extrusion temperatures, 130～170 ℃ of die temperatures, extruder screw rotating speed are 20～40 rev/mins;
The 3rd step, cooling granulation: will extrude the material bar that obtains and under natural air, cool off, the full biodegradable starch base original position fibre reinforced composites that promptly obtain through the dicing machine granulation.
Among the present invention: native starch is selected for use without one or more the arbitrary combination in the W-Gum of chemistry or physically modified, Starch rice, wheat starch, tapioca(flour), sweet potato starch, the yam starch; Softening agent is selected one or more the arbitrary combination in glycerine, terepthaloyl moietie, Ucar 35, methane amide, ethanamide, sorbyl alcohol, 2 hydroxy ethylamine, the trolamine for use; Become fiberized resin to select POLYACTIC ACID, polycaprolactone, poly (hydroxyalkanoate), polyhydroxyalkanoate for use, gather the hydroxybutyric acid valerate, gather hydroxyl valerate, poly butyric ester, polyhydroxybutyrate valeric acid copolyesters, poly butylene succinate, poly-succinic pinakon ester, gather one or more the arbitrary combination in hexanodioic acid-butylene terephthalate, the poly-succinic-hexanodioic acid-butyleneglycol multipolymer; Expanding material is selected one or more the arbitrary combination in maleic anhydride, dioctyl maleate, EVOH, ethylene-acrylic acid copolymer, vinylformic acid, the methacrylic ester for use.
The contained thermoplastic starch of the full biodegradable starch base original position fibre reinforced composites of the present invention preparation is up to more than 80%; Thereby under the prerequisite of loss material physicochemical property not, reduced the cost of product; And have better machining property and application performance, the mass market that helps starch-based material is promoted.
has good processibility with the full biodegradable starch base original position fibre reinforced composites of present method preparation; Can be as the interchangeable heat thermoplastic plastic; Through extruding method forming process such as injection moulding; The full biodegradable starch base original position fibre reinforced composites of
present method preparation are compared with pure thermoplastic starch sill can; Has good comprehensive performances; Higher mechanical property and other physical and mechanical properties; Can be in the Application Areas of general-purpose plastics, like wrapping material, disposable tableware; Garden supplies, widespread uses such as electronic product; It is simple that
prepares in-situ micro-fibril reinforced composite material technology with present method; Be easy to control; Can adopt general device of plastic processing, reduce investment outlay; Each component of
this starch-based original position fibre reinforced composites can both be degraded; Belong to the totally biodegradable plastics; Environmental pollution can be do not caused, " white pollution " problem can be thoroughly solved.
Embodiment
The present invention is realized that by following practical implementation measure wherein said raw material umber is parts by weight except that specified otherwise.Below in conjunction with embodiment the present invention is done into-goes on foot detailed description.
The consumption of each component sees the following form in the embodiment of the invention.
Annotate: numeral all refers to weight ratio (umber) in the table.
Implementation step is:
The first step, batching premix: get native starch, softening agent, one-tenth fiberized resin, expanding material part, stirring and evenly mixing 20～30 min in high-speed mixer by listed weight ratio proportioning in the table;
Second step, the melt blending granulation: the batching after the Preblend is placed the twin screw extruder melt blending and extrudes, 145～190 ℃ of extrusion temperatures, 130～170 ℃ of die temperatures, extruder screw rotating speed are 20～40 rev/mins;
The 3rd step, cooling granulation: will extrude the material bar that obtains and under natural air, cool off, the full biodegradable starch base original position fibre reinforced composites that promptly obtain through the dicing machine granulation.
Embodiments of the invention all can be implemented.The invention is not restricted to this 10 embodiment.
Claims (6)
1. full biodegradable starch base original position fibre reinforced composites is characterized in that the weight proportion of its each component is: 60～80 parts of native starches, 15～25 parts in softening agent, 5～20 parts of fiberized resins of one-tenth, 0.5～2 part of expanding material.
2. full biodegradable starch base original position fibre reinforced composites according to claim 1; It is characterized in that described native starch is meant without one or more the arbitrary combination in the W-Gum of chemistry or physically modified, Starch rice, wheat starch, tapioca(flour), sweet potato starch, the yam starch.
3. full biodegradable starch base original position fibre reinforced composites according to claim 1; It is characterized in that described softening agent is one or more the arbitrary combination in glycerine, terepthaloyl moietie, Ucar 35, methane amide, ethanamide, sorbyl alcohol, 2 hydroxy ethylamine, the trolamine.
4. full biodegradable starch base original position fibre reinforced composites according to claim 1; It is characterized in that described one-tenth fiberized resin is POLYACTIC ACID, polycaprolactone, poly (hydroxyalkanoate), polyhydroxyalkanoate, gather the hydroxybutyric acid valerate, gather hydroxyl valerate, poly butyric ester, polyhydroxybutyrate valeric acid copolyesters, poly butylene succinate, poly-succinic pinakon ester, gather one or more the arbitrary combination in hexanodioic acid-butylene terephthalate, the poly-succinic-hexanodioic acid-butyleneglycol multipolymer.
5. full biodegradable starch base original position fibre reinforced composites according to claim 1; It is characterized in that described expanding material is one or more the arbitrary combination in maleic anhydride, dioctyl maleate, EVOH, ethylene-acrylic acid copolymer, vinylformic acid, the methacrylic ester.
6. prepare the method for the described full biodegradable starch base of claim 1 original position fibre reinforced composites, the steps include:
The first step, batching premix: get 60～80 parts of native starches, 15～25 parts in softening agent, become 5～20 parts of fiberized resins, 0.5～2 part of expanding material, stirring and evenly mixing 20～30 min in high-speed mixer by weight proportioning;
Second step, the melt blending granulation: the batching after the Preblend is placed the twin screw extruder melt blending and extrudes, 145～190 ℃ of extrusion temperatures, 130～170 ℃ of die temperatures, extruder screw rotating speed are 20～40 rev/mins;
The 3rd step, cooling granulation: will extrude the material bar that obtains and under natural air, cool off, the full biodegradable starch base original position fibre reinforced composites that promptly obtain through the dicing machine granulation.
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| CN2012102317695A CN102702580A (en) | 2012-07-06 | 2012-07-06 | Full-biodegradable starch-base in-situ fiber reinforced composite material and preparation method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103965516A (en) * | 2013-02-01 | 2014-08-06 | 上海杰事杰新材料(集团)股份有限公司 | Fully biodegradable masterbatch and preparation method thereof |
| CN104098882A (en) * | 2014-07-31 | 2014-10-15 | 宁国市日格美橡塑制品有限公司 | Degradable plastic material |
| CN104231332A (en) * | 2014-10-08 | 2014-12-24 | 高忠青 | Environment-friendly polyhydroxybutyrate-hydroxyvalerate plastic material |
| CN104441542A (en) * | 2014-11-18 | 2015-03-25 | 东莞市方中运动制品有限公司 | Drawing process and application of starch degradable plastics |
| CN104945681A (en) * | 2015-06-25 | 2015-09-30 | 张家港市大能塑料制品有限公司 | Degradable plastics and method for preparing the same |
| CN105252741A (en) * | 2015-11-19 | 2016-01-20 | 湖南省客来宝生物能源科技有限公司 | Pelletizing mechanism for corn starch biodegradable film |
| CN106084700A (en) * | 2016-08-17 | 2016-11-09 | 云南天禾地生物科技股份有限公司 | A kind of low cost controllable full-biodegradable mulch film and preparation method thereof |
| CN112778723A (en) * | 2020-12-31 | 2021-05-11 | 武汉华丽环保科技有限公司 | Starch-based degradable desorption tube material and preparation method thereof |
| CN113736146A (en) * | 2021-09-09 | 2021-12-03 | 谭卓华 | Degradable high-performance tableware material particle with ceramic texture and preparation method thereof |
| CN115627055A (en) * | 2022-09-01 | 2023-01-20 | 安徽瑞鸿新材料科技有限公司 | Starch-based PBAT biodegradable material and preparation and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103965516A (en) * | 2013-02-01 | 2014-08-06 | 上海杰事杰新材料(集团)股份有限公司 | Fully biodegradable masterbatch and preparation method thereof |
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| CN104231332A (en) * | 2014-10-08 | 2014-12-24 | 高忠青 | Environment-friendly polyhydroxybutyrate-hydroxyvalerate plastic material |
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| CN104945681A (en) * | 2015-06-25 | 2015-09-30 | 张家港市大能塑料制品有限公司 | Degradable plastics and method for preparing the same |
| CN105252741A (en) * | 2015-11-19 | 2016-01-20 | 湖南省客来宝生物能源科技有限公司 | Pelletizing mechanism for corn starch biodegradable film |
| CN106084700A (en) * | 2016-08-17 | 2016-11-09 | 云南天禾地生物科技股份有限公司 | A kind of low cost controllable full-biodegradable mulch film and preparation method thereof |
| CN112778723A (en) * | 2020-12-31 | 2021-05-11 | 武汉华丽环保科技有限公司 | Starch-based degradable desorption tube material and preparation method thereof |
| CN113736146A (en) * | 2021-09-09 | 2021-12-03 | 谭卓华 | Degradable high-performance tableware material particle with ceramic texture and preparation method thereof |
| CN115627055A (en) * | 2022-09-01 | 2023-01-20 | 安徽瑞鸿新材料科技有限公司 | Starch-based PBAT biodegradable material and preparation and application thereof |
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Application publication date: 20121003 |