CN106189142A - A kind of degradable straw starch plastics and preparation method and application - Google Patents
A kind of degradable straw starch plastics and preparation method and application Download PDFInfo
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- CN106189142A CN106189142A CN201610636763.4A CN201610636763A CN106189142A CN 106189142 A CN106189142 A CN 106189142A CN 201610636763 A CN201610636763 A CN 201610636763A CN 106189142 A CN106189142 A CN 106189142A
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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
- C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
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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
- B29B9/02—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
- 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
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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
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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
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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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
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
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Abstract
The invention provides a kind of degradable straw starch plastics and preparation method and application, relate to plastic production technical field.Degradable straw starch plastics include the raw material of following parts by weight: straw 0 10 parts, starch 25 35 parts, fully-degradable polymer resin 50 65 parts and pluronic polymer 24 parts.Preparation method comprises the steps: that the straw by granularity is 250 350 mesh is mixed to form raw material with starch, fully-degradable polymer resin and pluronic polymer, and through twin-screw mixer extruder extruding pelletization, thus raw particles is prepared in formation.Degradable straw starch plastic applications prints silk, disposable tableware, toothbrush, comb in baby toy, 3D.Degradable straw starch plastics obtained by the present invention, pass through national food hygienic standard, its product good mechanical performance, hot strength reaches 28MPa 38MPa, impact strength is at more than 16MPa, nontoxic, and discarded degradable straw starch plastics can be with degradable, to bad border without any harm.
Description
Technical field
The present invention relates to plastic production technical field, particularly relate to a kind of degradable straw starch plastics and preparation thereof
Method and application.
Background technology
Along with the development of petrochemical industry, petroleum resources reduce day by day, the harm that petroleum by-product brings to environment with
Day all increasings, wherein non-degradable plastics are maximum to the threat in bad border.
From 20 century 70s, in order to reduce the plastic refuse pollution to environment, as polycaprolactone (PCL), poly-breast
Acid (PLA), poly butylene succinate (PBS), tetramethylene adipate and the copolymer of mutual-phenenyl two acid bromide two alcohol ester
(PBAT), the Biodegradable polyester such as beta-hydroxy-butanoic acid-co-hydroxyl pentanoate copolymer has obtained widely studied.
The copolymer (PBAT) of tetramethylene adipate and mutual-phenenyl two acid bromide two alcohol ester is a kind of aromatic polyester, be by
The three-element copolymerized ester that p-phthalic acid, adipic acid and BDO are polymerized, had both had the compliance of long methene chain, again
There is the toughness of aromatic ring, it is possible to improve the fragility of polylactic acid (PLA) and improve its processing characteristics.But the price of this material is relatively at present
Height, limits the application of its market.Starch is one of most potential object of study in degradation material modification field.But starch because of
For being difficult to combine with hydrophobic polyester plastics containing too many hydrophilic hydroxyl, cause mechanical properties decrease.It is thus desirable to
Starch is modified, improves the interfacial adhesion between starch and matrix such that it is able to be well dispersed in matrix resin, keep away
Exempt from the gathering of granule.
Summary of the invention
It is an object of the invention to provide a kind of degradable straw starch plastics and preparation method and application, its product mechanics
Function admirable, hot strength reaches 28MPa-38MPa, and impact strength is at more than 16MPa, nontoxic, and discarded high-fall
Solving straw starch plastics can be with degradable, to bad border without any harm.
The technical scheme is that
The invention provides a kind of degradable straw starch plastics, including the raw material of following parts by weight: straw 0-10 part,
Starch 25-35 part, fully-degradable polymer resin 50-65 part and pluronic polymer 2-4 part, wherein, described fully-degradable polymer
Resin is the copolymer mixture with polylactic acid of tetramethylene adipate and mutual-phenenyl two acid bromide two alcohol ester.
On the basis of technique scheme, the present invention can also do and improve as follows:
Alternatively, including the raw material of following parts by weight: straw 5-8 part, starch 30-35 part, fully-degradable polymer resin
55-65 part and pluronic polymer 3-4 part.
Alternatively, including the raw material of following parts by weight: straw 6 parts, starch 32 parts, fully-degradable polymer resin 59 parts with
And pluronic polymer 3 parts.
Alternatively, the copolymer of described tetramethylene adipate and mutual-phenenyl two acid bromide two alcohol ester and the weight of described polylactic acid
Amount ratio is 1-3:3-5.
Alternatively, described pluronic polymer includes titanate coupling agent, epoxy soybean oil and maleic anhydride grafted polyethylene
Any one or two or more mixing in wax.
Alternatively, described pluronic polymer in the component of following parts by weight any one or two or more mixed
Close: titanate coupling agent 0.5-2 part, epoxy soybean oil 0.5-2 part and maleic anhydride grafted polyethylene wax 0.5-2 part.
Present invention also offers a kind of method preparing described degradable straw starch plastics, comprise the steps: head
It is first that the straw of 150-300 mesh, starch mix and are warming up to 80 DEG C-95 DEG C and obtains mixture A by granularity, then by described degradable
Macromolecule resin joins in described mixture A, then heats to 120 DEG C-130 DEG C and is incubated 10-30 minute to carry out except water
Obtain mixture B after process, described mixture B is obtained particle C through twin-screw mixer extruder extruding pelletization, by described grain
Sub-C and described fully-degradable polymer mixed with resin uniformly obtain mixture D, described mixture D are extruded through twin-screw mixer
Machine extruding pelletization obtains preparing the raw particles of described degradable straw starch plastics.
Alternatively, the degradable straw starch plastics for final preparation need to make annealing treatment, and are specially 110
Keep 3-4 minute at DEG C-130 DEG C, slow cooling subsequently.
Alternatively, described twin-screw mixer extruder is provided with the firstth district to the tenth district and head district, described double-screw mixing
Refining extruder is additionally provided with vacuum extractor, and described raw material is transported to successively by described twin-screw mixer extruder from described firstth district
Described tenth district is also entered described head district by the tenth district, and then obtain described raw particles；
Described extruding pelletization completes under the conditions of 145 DEG C-170 DEG C, and wherein, described firstth district is to the tenth district and head
The temperature in district be respectively as follows: 145 DEG C of the firstth district, 145 DEG C of the secondth district, 150 DEG C of the 3rd district, 150 DEG C of the 4th district, 155 DEG C of the 5th district,
Six 155 DEG C of districts, SECTOR-SEVEN 160 DEG C, Section Eight 160 DEG C, 165 DEG C of the 9th district, 165 DEG C of the tenth district, 170 DEG C of head district.
Present invention also offers the application of a kind of degradable straw starch plastics, described degradable
Straw starch plastic applications in baby toy, 3D printer, disposable tableware, toothbrush,
Comb, used goods can fully bio-degradable.
Beneficial effects of the present invention:
1. the degradable straw starch plastics obtained by the present invention, by national food hygienic standard, its product mechanical property
Can be excellent, hot strength reaches 28MPa-38MPa, and impact strength is at more than 16MPa, nontoxic, and discarded degradable
Straw starch plastics can be with degradable, to bad border without any harm；
2. the degradable straw starch plastics of the present invention use straw for be prepared from as raw material, which employs innoxious
Process agricultural wastes straw, it is provided that the processing method of a kind of new straw, abandon the process side of conventional crop straw burning
Method, decreases and burns the environmental pollution produced, it is achieved that the refuse reclamation of straw, improve its economic worth；
3. the degradable straw starch plastics of the present invention use corn starch to be raw material, promote the kind of crops Semen Maydis
Plant, increase peasant income, do one's bit for agriculture, rural areas and farmers construction；
4. the degradable straw starch plastics of the present invention are with fully-degradable polymer resin as raw material, it is to avoid non-degradable is moulded
The use of material, slows down oil crisis；
5. the degradable straw starch plastics of the present invention have the abnormal smells from the patient of slight bio-based materials, and its abnormal smells from the patient can be long-term
Keeping, abnormal smells from the patient is natural, nontoxic；
6. the degradable straw starch plastics in use stable performance of the present invention, is smooth to the touch, and clean mark is resistance to
Heat, fully meets the daily demand of people；
7. the degradable straw starch plastics of the present invention can carry out degradation treatment after using, and environment is not resulted in pollution；
8. the method technique preparing degradable straw starch plastics of the present invention is the most ripe, green low-carbon；
9. the present invention passes through twice pelletize, and raw material can be made to mix evenly.
Detailed description of the invention
Principle and feature to the present invention are described below, and example is served only for explaining the present invention, is not intended to limit
Determine the scope of the present invention.
Degradable straw starch plastics obtained by the present invention, by national food hygienic standard, its product mechanical property
Excellent, hot strength reaches 28MPa-38MPa, and impact strength is at more than 16MPa, nontoxic, and discarded degradable straw
Stalk starch plastic can be with degradable, to bad border without any harm.
The degradable straw starch plastics of the present invention use straw for be prepared from as raw material, which employs innoxious place
Reason agricultural wastes straw, it is provided that the processing method of a kind of new straw, has abandoned the processing method of conventional crop straw burning,
Decrease and burn the environmental pollution produced, it is achieved that the refuse reclamation of straw, improve its economic worth.
The degradable straw starch plastics of the present invention use corn starch to be raw material, promote the plantation of crops Semen Maydis,
Increase peasant income, do one's bit for agriculture, rural areas and farmers construction.
The degradable straw starch plastics of the present invention are with fully-degradable polymer resin as raw material, it is to avoid non-degradable plastics
Use, slow down oil crisis.
The degradable straw starch plastics of the present invention have the abnormal smells from the patient of slight bio-based materials, and its abnormal smells from the patient can be protected for a long time
Holding, abnormal smells from the patient is natural, nontoxic.
The degradable straw starch plastics in use stable performance of the present invention, is smooth to the touch, and clean mark is resistance to
Heat, fully meets the daily demand of people.
The degradable straw starch plastics of the present invention can carry out degradation treatment after using, and environment is not resulted in pollution；
The method technique preparing degradable straw starch plastics of the present invention is the most ripe, green low-carbon；
The present invention passes through twice pelletize, and raw material can be made to mix evenly.
The invention provides a kind of degradable straw starch plastics, including the raw material of following parts by weight: straw 0-10 part,
Starch 25-35 part, fully-degradable polymer resin 50-65 part and pluronic polymer 2-4 part, wherein, described fully-degradable polymer
Resin is the copolymer (PBAT) mixture with polylactic acid (PLA) of tetramethylene adipate and mutual-phenenyl two acid bromide two alcohol ester.
In a preferred version, described degradable straw starch plastics include the raw material of following parts by weight: straw 5-8
Part, starch 30-35 part, fully-degradable polymer resin 55-65 part and pluronic polymer 3-4 part.
In a preferred version, described degradable straw starch plastics include the raw material of following parts by weight: straw 6
Part, starch 32 parts, fully-degradable polymer resin 59 parts and pluronic polymer 3 parts.
In a preferred version, the copolymer of diol ester and mutual-phenenyl two acid bromide two alcohol ester and the mixture of polylactic acid,
Wherein, the copolymer of described tetramethylene adipate and mutual-phenenyl two acid bromide two alcohol ester is 1-3 with the weight ratio of described polylactic acid:
3-5。
Further, described pluronic polymer includes titanate coupling agent, epoxy soybean oil and maleic anhydride grafted polyethylene
Any one or two or more mixing in wax.
Further, described pluronic polymer in the component of following parts by weight any one or two or more mixed
Close: titanate coupling agent 0.5-2 part, epoxy soybean oil 0.5-2 part and maleic anhydride grafted polyethylene wax 0.5-2 part.
Present invention also offers a kind of method preparing described degradable straw starch plastics, comprise the steps: head
It is first that the straw of 150-300 mesh, starch mix and are warming up to 80 DEG C-95 DEG C and obtains mixture A by granularity, then by described degradable
Macromolecule resin joins in described mixture A, then heats to 120 DEG C-130 DEG C and is incubated 10-30 minute to carry out except water
Obtain mixture B after process, described mixture B is obtained particle C through twin-screw mixer extruder extruding pelletization, by described grain
Sub-C and described fully-degradable polymer mixed with resin uniformly obtain mixture D, described mixture D are extruded through twin-screw mixer
Machine extruding pelletization obtains preparing the raw particles of described degradable straw starch plastics.
In a preferred version, described step is specific as follows:
Alternatively, the degradable straw starch plastics for final preparation need to make annealing treatment, and are specially 110
Keep 3-4 minute at DEG C-130 DEG C, slow cooling subsequently.
In a preferred version, described twin-screw mixer extruder is provided with the firstth district to the tenth district and head district, institute
State twin-screw mixer extruder and be additionally provided with vacuum extractor, described twin-screw mixer extruder by described raw material from described firstth district
It is transported to described tenth district successively and is entered described head district by the tenth district, and then obtaining described raw particles；
Described extruding pelletization completes under the conditions of 145 DEG C-170 DEG C, and wherein, described firstth district is to the tenth district and head
The temperature in district be respectively as follows: 145 DEG C of the firstth district, 145 DEG C of the secondth district, 150 DEG C of the 3rd district, 150 DEG C of the 4th district, 155 DEG C of the 5th district,
Six 155 DEG C of districts, SECTOR-SEVEN 160 DEG C, Section Eight 160 DEG C, 165 DEG C of the 9th district, 165 DEG C of the tenth district, 170 DEG C of head district.
Present invention also offers the application of a kind of degradable straw starch plastics, described degradable straw starch plastics can be answered
Printing the fast-moving consumer goods such as silk, disposable tableware, toothbrush, comb for baby toy, 3D, used goods can be biological complete
Degraded.
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with embodiment 1-embodiment
8, the present invention is further elaborated.It should be noted that in the case of not conflicting, embodiment in the application and
Feature in embodiment can be mutually combined.The raw material and the equipment that use in following example are commercially available if not otherwise indicated.
For convenience of description, hereinafter the copolymer of tetramethylene adipate and mutual-phenenyl two acid bromide two alcohol ester contracts with its English
Writing PBAT to substitute, polylactic acid substitutes with its english abbreviation PLA.
Embodiment 1
Present embodiments providing a kind of method preparing degradable straw starch plastics, needed raw material is straw, starch, complete
Degraded macromolecular resin and pluronic polymer.Above-mentioned raw materials is weighed by following parts by weight: straw 10 parts, starch 25 parts, complete
Degraded macromolecular resin 50 parts and pluronic polymer 4 parts.Wherein, fully-degradable polymer resin be PLA and PBAT by weight
The mixture that 5:3 is formed, pluronic polymer is titanate coupling agent.The granularity of described straw is 150 mesh.
Its concrete production technology is as follows:
1. straw, starch and pluronic polymer are mixed and be warming up to 80 DEG C and obtain mixture A；
2. PBAT is joined in mixture A, then heat to 120 DEG C and be incubated 10 minutes to carry out obtaining after processing except water
To mixture B；
3. mixture B is placed in twin-screw mixer extruder, extruding pelletization under the conditions of 145 DEG C-170 DEG C.Described double
Screw extruder screw diameter is 75mm, and draw ratio is 40.Described extruder is provided with the firstth district to the tenth district and head district, institute
State twin-screw mixer extruder mixture B is transported to from described firstth district described tenth district successively and is entered by the tenth district described
Head district, and then obtain raw particles C.Wherein, the temperature in described firstth district to the tenth district and head district is respectively as follows: the firstth district
145 DEG C, 145 DEG C of the secondth district, 150 DEG C of the 3rd district, 150 DEG C of the 4th district, 155 DEG C of the 5th district, 155 DEG C of the 6th district, SECTOR-SEVEN 160
DEG C, Section Eight 160 DEG C, 165 DEG C of the 9th district, 165 DEG C of the tenth district, 170 DEG C of head district.
4. above-mentioned raw materials particle is mixed homogeneously with PLA and obtain mixture D, by mixture D according to the method described above through double
Screw extruder pelletize obtains final degradable straw starch plastic pellet.
5. degradable straw starch plastic pellet is put into baby toy, 3D prints in silk, disposable tableware production line
Can directly prepare product, product needed makes annealing treatment, and keeps 3 minutes, slow cooling subsequently at 110 DEG C.The product obtained
Product heat resistance is good, is unlikely to deform.
Embodiment 2
Present embodiments providing a kind of method preparing straw starch plastics, needed raw material is starch, fully-degradable polymer
Resin and pluronic polymer.Above-mentioned raw materials is weighed by following parts by weight: starch 35 parts, fully-degradable polymer resin 62 parts with
And pluronic polymer 3 parts.Wherein, the mixture that fully-degradable polymer resin is formed by weight 5:2 by PLA and PBAT is high
Molecule auxiliary agent is maleic anhydride grafted polyethylene wax.
Its concrete production technology is with embodiment 1, and here is omitted.
Embodiment 3
Present embodiments providing a kind of method preparing straw starch plastics, needed raw material is straw, starch, degradable height
Molecule resin and pluronic polymer.Above-mentioned raw materials is weighed by following parts by weight: straw 5 parts, starch 27 parts, degradable high score
56 parts of subtree fat and pluronic polymer 4 parts.Wherein, fully-degradable polymer resin is formed by weight 5:2 by PLA and PBAT
Mixture, pluronic polymer be titanate coupling agent and maleic anhydride grafted polyethylene wax by weight 3:7 formed mixed
Compound.The granularity of described straw is 150 mesh.
Its concrete production technology is with embodiment 1, and here is omitted.
Embodiment 4
Present embodiments providing a kind of method preparing straw starch plastics, needed raw material is straw, starch, degradable height
Molecule resin and pluronic polymer.Above-mentioned raw materials is weighed by following parts by weight: straw 8 parts, starch 30 parts, degradable high score
58 parts of subtree fat and pluronic polymer 4 parts.Fully-degradable polymer resin is mixing that PLA and PBAT 3:1 by weight is formed
Compound, the mixture that pluronic polymer is formed by weight 2:3 by epoxy soybean oil and titanate coupling agent.Described straw
Granularity is 200 mesh.
Its concrete production technology is with embodiment 1, and here is omitted.
Embodiment 5
Present embodiments providing a kind of method preparing straw starch plastics, needed raw material is straw, starch, degradable height
Molecule resin and pluronic polymer.Above-mentioned raw materials is weighed by following parts by weight: straw 6 parts, starch 29 parts, degradable high score
60 parts of subtree fat and pluronic polymer 2 parts.Wherein, fully-degradable polymer resin is formed by weight 5:2 by PLA and PBAT
Mixture, pluronic polymer is the mixing that epoxy soybean oil and maleic anhydride grafted polyethylene wax are formed by weight 2:1
Thing.The granularity of described straw is 250 mesh.
Its concrete production technology is with embodiment 1, and here is omitted.
Embodiment 6
Present embodiments providing a kind of method preparing straw starch plastics, needed raw material is straw, starch, degradable height
Molecule resin and pluronic polymer.Above-mentioned raw materials is weighed by following parts by weight: straw 3 parts, starch 32 parts, degradable high score
65 parts of subtree fat and pluronic polymer 2 parts.Wherein, fully-degradable polymer resin is formed by weight 5:3 by PLA and PBAT
Mixture, the mixture that pluronic polymer is epoxy soybean oil, titanate coupling agent is formed by weight 1:2.Described straw
The granularity of stalk is 300 mesh.
Its concrete production technology is with embodiment 1, and here is omitted.
Embodiment 7
Present embodiments providing a kind of method preparing straw starch plastics, needed raw material is straw, starch, degradable height
Molecule resin and pluronic polymer.Above-mentioned raw materials is weighed by following parts by weight: straw 7 parts, starch 35 parts, degradable high score
55 parts of subtree fat and pluronic polymer 4 parts.Wherein, fully-degradable polymer resin is formed by weight 2:1 by PLA and PBAT
Mixture, high score
Its concrete production technology is as follows:
1. straw, starch and pluronic polymer are mixed and be warming up to 90 DEG C and obtain mixture A；
2. PBAT is joined in mixture A, then heat to 130 DEG C and be incubated 30 minutes to carry out obtaining after processing except water
To mixture B；
3. mixture B is placed in twin-screw mixer extruder, extruding pelletization under the conditions of 145 DEG C-170 DEG C.Described double
Screw extruder screw diameter is 75mm, and draw ratio is 40.Described extruder is provided with the firstth district to the tenth district and head district, institute
State twin-screw mixer extruder mixture B is transported to from described firstth district described tenth district successively and is entered by the tenth district described
Head district, and then obtain raw particles C.Wherein, the temperature in described firstth district to the tenth district and head district is respectively as follows: the firstth district
145 DEG C, 145 DEG C of the secondth district, 150 DEG C of the 3rd district, 150 DEG C of the 4th district, 155 DEG C of the 5th district, 155 DEG C of the 6th district, SECTOR-SEVEN 160
DEG C, Section Eight 160 DEG C, 165 DEG C of the 9th district, 165 DEG C of the tenth district, 170 DEG C of head district.
4. above-mentioned raw materials particle is mixed homogeneously with PLA and obtain mixture D, by mixture D according to the method described above through double
Screw extruder pelletize obtains final degradable straw starch plastic pellet.
5. degradable straw starch plastic pellet is put into baby toy, 3D prints in silk, disposable tableware production line
Can directly prepare product, product needed makes annealing treatment, and keeps 4 minutes, slow cooling subsequently at 130 DEG C.The product obtained
Product heat resistance is good, is unlikely to deform.
Embodiment 8
Present embodiments providing a kind of method preparing straw starch plastics, needed raw material is straw, starch, degradable height
Molecule resin and pluronic polymer.Above-mentioned raw materials is weighed by following parts by weight: straw 6 parts, starch 32 parts, degradable high score
59 parts of subtree fat and pluronic polymer 3 parts.Wherein, fully-degradable polymer resin is formed by weight 1:1 by PLA and PBAT
Mixture, pluronic polymer be epoxy soybean oil, titanate coupling agent, maleic anhydride grafted polyethylene wax by weight 1:1:
1 mixture formed.The granularity of described straw is 300 mesh.
Its concrete production technology is as follows:
1. straw, starch and pluronic polymer are mixed and be warming up to 85 DEG C and obtain mixture A；
2. PBAT is joined in mixture A, then heat to 125 DEG C and be incubated 20 minutes to carry out obtaining after processing except water
To mixture B；
3. mixture B is placed in twin-screw mixer extruder, extruding pelletization under the conditions of 145 DEG C-170 DEG C.Described double
Screw extruder screw diameter is 75mm, and draw ratio is 40.Described extruder is provided with the firstth district to the tenth district and head district, institute
State twin-screw mixer extruder mixture B is transported to from described firstth district described tenth district successively and is entered by the tenth district described
Head district, and then obtain raw particles C.Wherein, the temperature in described firstth district to the tenth district and head district is respectively as follows: the firstth district
145 DEG C, 145 DEG C of the secondth district, 150 DEG C of the 3rd district, 150 DEG C of the 4th district, 155 DEG C of the 5th district, 155 DEG C of the 6th district, SECTOR-SEVEN 160
DEG C, Section Eight 160 DEG C, 165 DEG C of the 9th district, 165 DEG C of the tenth district, 170 DEG C of head district.
4. above-mentioned raw materials particle is mixed homogeneously with PLA and obtain mixture D, by mixture D according to the method described above through double
Screw extruder pelletize obtains final degradable straw starch plastic pellet.
5. degradable straw starch plastic pellet is put into baby toy, 3D prints in silk, disposable tableware production line
Can directly prepare product, product needed makes annealing treatment, and keeps 3.5 minutes, slow cooling subsequently at 120 DEG C.Obtain
Product heat resistance is good, is unlikely to deform.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all spirit in the present invention and
Within principle, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (10)
1. degradable straw starch plastics, it is characterised in that include the raw material of following parts by weight: straw 0-10 part, shallow lake
Powder 25-35 part, fully-degradable polymer resin 50-65 part and pluronic polymer 2-4 part, wherein, described fully-degradable polymer tree
Fat is the copolymer mixture with polylactic acid of tetramethylene adipate and mutual-phenenyl two acid bromide two alcohol ester.
Degradable straw starch plastics the most according to claim 1, it is characterised in that include the former of following parts by weight
Material: straw 5-8 part, starch 30-35 part, fully-degradable polymer resin 55-65 part and pluronic polymer 3-4 part.
Degradable straw starch plastics the most according to claim 2, it is characterised in that include the former of following parts by weight
Material: straw 6 parts, starch 32 parts, fully-degradable polymer resin 59 parts and pluronic polymer 3 parts.
Degradable straw starch plastics the most according to claim 1, it is characterised in that described tetramethylene adipate and right
The copolymer of benzene dicarboxylic acid butanediol ester is 1-3:3-5 with the weight ratio of described polylactic acid.
5. according to the degradable straw starch plastics according to any one of claim 1-4, it is characterised in that described polymeric retention aid
Agent include in titanate coupling agent, epoxy soybean oil and maleic anhydride grafted polyethylene wax any one or two or more mixed
Close.
Degradable straw starch plastics the most according to claim 5, it is characterised in that described pluronic polymer is selected from as follows
Any one or two or more mixing in the component of parts by weight: titanate coupling agent 0.5-2 part, epoxy soybean oil 0.5-
2 parts and maleic anhydride grafted polyethylene wax 0.5-2 part.
7. the method for the degradable straw starch plastics that a kind is prepared according to any one of claim 1-6, it is characterised in that bag
Include following steps: be first that the straw of 150-300 mesh, starch mix and are warming up to 80 DEG C-95 DEG C and obtains mixture A by granularity,
Again described fully-degradable polymer resin is joined in described mixture A, then heat to 120 DEG C-130 DEG C and be incubated 10-30
Minute with carry out except water process after obtain mixture B, described mixture B is obtained through twin-screw mixer extruder extruding pelletization
Particle C, uniformly obtains mixture D by described particle C with described fully-degradable polymer mixed with resin, described mixture D is passed through
Twin-screw mixer extruder extruding pelletization obtains preparing the raw particles of described degradable straw starch plastics.
The method preparing degradable straw starch plastics the most according to claim 7, it is characterised in that for final preparation
Degradable straw starch plastics need make annealing treatment, be specially at 110 DEG C-130 DEG C keep 3-4 minute, delay subsequently
Slow cooling.
9. according to the method preparing degradable straw starch plastics described in claim 7 or 8, it is characterised in that described pair of spiral shell
Bar mixing extruder is provided with the firstth district to the tenth district and head district, and described twin-screw mixer extruder is additionally provided with vacuum means
Putting, described raw material is transported to described tenth district from described firstth district and is entered by the tenth district by described twin-screw mixer extruder successively
Enter described head district, and then obtain described raw particles；
Described extruding pelletization completes under the conditions of 145 DEG C-170 DEG C, wherein, and described firstth district to the tenth district and head district
Temperature is respectively as follows: 145 DEG C of the firstth district, 145 DEG C of the secondth district, 150 DEG C of the 3rd district, 150 DEG C of the 4th district, 155 DEG C of the 5th district, the 6th district
155 DEG C, SECTOR-SEVEN 160 DEG C, Section Eight 160 DEG C, 165 DEG C of the 9th district, 165 DEG C of the tenth district, 170 DEG C of head district.
10. one kind according to the preparation method according to any one of claim 7-9 prepare degradable straw starch plastics should
With, it is characterised in that described degradable straw starch plastic applications is in baby toy, 3D printer, disposable tableware, tooth
Brush, comb.
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| CN114031821A (en) * | 2021-12-06 | 2022-02-11 | 湖南登科材料科技有限公司 | Fully-degradable straw starch plastic and preparation system thereof |
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