CN110498950A - A kind of thermoplastic starch and its preparation method and application based on coordination effect - Google Patents
A kind of thermoplastic starch and its preparation method and application based on coordination effect Download PDFInfo
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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
- B29B7/002—Methods
- B29B7/007—Methods for continuous mixing
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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
- B29B7/92—Wood chips or wood 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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- 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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
- C08K5/098—Metal salts of carboxylic acids
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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
- B29B7/34—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
- B29B7/48—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
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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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- 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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- Polymers & Plastics (AREA)
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Abstract
The present invention discloses a kind of thermoplastic starch and its preparation method and application based on coordination effect.It is of the invention the preparation method is as follows: starch and plasticizer are pre-mixed, obtain pre-composition, add acetic anhydride zinc and further mix, subsequent extruding pelletization obtains the thermoplastic starch based on coordination effect.This method realizes starch hydroxyl and Zn by reactive extrursion2+Efficient coordination, only need to be added a small amount of acetic anhydride zinc, so that it may obtain the modified thermoplastic starch with outstanding advantages of high-fire resistance, high hydrophobicity and high intensity.Its glass transition temperature is improved to 89.1 DEG C；Surface contact angle is improved to 118.2 °；Tensile strength is improved to 9.2MPa.This modified thermoplastic starch is biodegradable, environmentally protective, excellent combination property, and easy to process, is expected to be applied to the fields such as packaging, disposable tableware and agricultural mulching.
Description
Technical field
The invention belongs to biodegradable plastic field, in particular to a kind of thermoplastic starch and its system based on coordination effect
Preparation Method and application.
Background technique
In recent years, with the raising of national awareness of environment protection, develop Biodegradable high-molecular to replace conventional petroleum base high
Molecule is increasingly becoming the hot spot of research.Starch is a kind of natural polymer, has fully biodegradable, source wide, at low cost
The advantages that, development prospect is wide.Larger achievement is obtained both at home and abroad in the mechanical performance for improving starch plastics.However starch
The critical defect of high-hydrophilic still seriously limits the application of thermoplastic starch plastic.Chemical method is generallyd use, such as chemistry is handed over
Join, be esterified, being grafted, to carry out hydrophobically modified to starch.The basic principle is that introducing hydrophobic grouping by chemical reaction to substitute
Or original hydrophilic hydroxyl groups in shielding starch.However, chemical method often have it is cumbersome, be not easy secondary production and potential negative
The deficiencies of face ring border influences.By introducing metal ion, the physical crosslinking structure based on dynamic coordination key is constructed, avoiding is expected to
The defect of method and the purpose for realizing thermoplastic starch high performance.
Oxygen atom on starch hydroxyl contains lone pair electrons, thus starch has certain coordination ability, however, for anti-
The coordination between starch and metal ion in extrusion process is answered to rarely have detailed research to report at present.
Summary of the invention
In view of the deficiencies of the prior art, the primary purpose of the present invention is that providing a kind of thermoplastic starch based on coordination effect
Powder.The thermoplastic starch has both high-fire resistance, high hydrophobicity and high intensity.
Another object of the present invention is to provide a kind of above-mentioned preparation methods of the thermoplastic starch based on coordination effect.
A further object of the present invention is to provide be above set forth in it is a kind of based on the thermoplastic starch of coordination effect in packaging, primary
The application in the property fields such as tableware and agricultural mulching.
The purpose of the present invention is achieved through the following technical solutions:
A kind of preparation method of the thermoplastic starch based on coordination effect, includes the following steps: starch and plasticizer is pre-
Mixing, obtains pre-composition, adds acetic anhydride zinc and further mix, and the mass ratio of the starch and acetic anhydride zinc is 100:
1~100:5, subsequent extruding pelletization obtain the thermoplastic starch based on coordination effect.
Preferably, the mass ratio of the starch and acetic anhydride zinc is 100:3.
Preferably, the mass ratio of the starch and plasticizer is 3:2~4:1.
Preferably, the temperature of the extruding pelletization is 90~145 DEG C.
Preferably, reporting for the extruding pelletization is 70~90 revs/min.
Preferably, the starch is before using in 80~120 DEG C of dry 4~8h.
Preferably, the starch is one or more of wheaten starch, cornstarch, potato starch.
Preferably, the plasticizer is at least one of glycerol, water and urea, more preferably water and glycerol.
Preferably, the extruding pelletization uses single screw extrusion machine or double screw extruder, more preferably twin-screw extrusion
Machine.
Preferably, the preparation method of the thermoplastic starch based on coordination effect include well will be obtained described based on matching
The thermoplastic starch of position effect carries out purification processes.
Preferably, the mode of the purification processes is that Soxhlet extractor is used to mention by solvent of dehydrated alcohol in 75~95 DEG C
Pure 48~72h, drying.
The heat based on coordination effect that a kind of preparation method of above-mentioned thermoplastic starch based on coordination effect is prepared
Plastic starch.
The answering in packaging, disposable tableware and agricultural mulching field described above based on the thermoplastic starch of coordination effect
With.
Compared with prior art, the present invention has the following advantages and beneficial effects:
(1) zinc acetate dosage is few, and complexation reaction is high-efficient.
(2) thermoplastic starch of the present invention based on coordination effect has high-fire resistance.Due on starch molecular chain
Hydroxyl and Zn2+Coordination effect, form the cross-linked structure based on coordinate bond between starch molecular chain.The structure significantly mentions
The high heat resistance of material, glass transition temperature improve about 45 DEG C, up to 85~90 DEG C, facilitate the application for opening up material
Market.
(3) thermoplastic starch of the present invention based on coordination effect has high hydrophobicity.This thermoplastic starch is to pass through
Reactive extrursion realizes Zn in the hydroxyl and zinc acetate on starch molecular chain2+Efficient coordination, only need to be added a small amount of acetic anhydride
Zinc has the modified thermoplastic starch of coordination cross-linked network structure to get arriving.The coordination cross-linked network structure reduces starch
The associativity of free volume and hydroxyl effectively hinders the infiltration and association of hydrone, so that it is hydrophobic to greatly improve its
Property, contact angle is up to 118.2 °.
(4) thermoplastic starch of the present invention based on coordination effect has strong mechanical performance.Due on starch molecular chain
Hydroxyl and Zn2+Coordination effect, form the cross-linked structure based on coordinate bond between starch molecular chain.The structure is significant
The mechanical property for improving material, when the zinc acetate of 3wt.% is added, tensile strength and modulus reach respectively 9.2MPa and
985MPa。
(5) easy processing of the present invention: process simple process, it is easily operated.To equipment without particular/special requirement.
(6) present invention it is environmentally protective: raw material of the present invention be starch, glycerol, water and acetic anhydride zinc, it is at low cost.It is processed
Journey is generated without poisonous and harmful substance, no pollution to the environment.
Thermoplastic starch prepared by the present invention based on coordination effect, has both high-fire resistance, high hydrophobicity and high intensity
Characteristic, glass transition temperature improves to 89.1 DEG C；Surface contact angle is improved to 118.2 °；Tensile strength improve to
9.2MPa.This modified thermoplastic starch is biodegradable, environmentally protective, excellent combination property, and easy to process, is expected to be applied to
The fields such as packaging, disposable tableware and agricultural mulching.
Detailed description of the invention
Fig. 1 is CS, the infrared spectrogram of ZA (acetic anhydride zinc) and CS/ZA1, CS/ZA3 and CS/ZA5, wherein (a) is red
External spectrum total figure；It (b) is partial enlarged view.
Fig. 2 is CS, the x-ray photoelectron spectroscopy figure of ZA (acetic anhydride zinc) and CS/ZA5, wherein (a1)、(b1) be respectively
The C of CS1s、O1sSpectrogram；(a2)、(b2) be respectively ZA C1s、O1sSpectrogram；(a3)、(b3) be respectively CS/ZA5 C1s、O1sSpectrogram.
Fig. 3 is CS, the Zn of ZA (acetic anhydride zinc), CS/ZA1, CS/ZA3 and CS/ZA52pX-ray photoelectron spectroscopy figure.
Fig. 4 is the hydrogen nuclear magnetic resonance spectrogram of CS, CS/ZA3 and CS/ZA5, wherein the part of (a) corresponding 1st dotted line frame
Enlarged drawing, (b) partial enlarged view of corresponding 2nd dotted line frame, (c) partial enlarged view of corresponding 3rd dotted line frame.
The transmission electron microscope figure for the TPS-ZA5 that Fig. 5 is TPS and embodiment 3 is prepared, wherein (a1) and (a2) right
TPS is answered, (b1) and (b2) TPS-ZA5 is corresponded to, circular dashed line, which encloses, to be zinc ion cluster dark space (Zn2+cluster)。
Fig. 6 is the scanning electron microscope diagram of TPS, CS/ZA1, CS/ZA3 and CS/ZA5.Wherein, (a1)~(a2) corresponding
TPS；(b1)~(b2) correspond to TPS-ZA1；(c1)~(c2) correspond to TPS-ZA3；(d1)~(d2) correspond to TPS-ZA5.
(a) in Fig. 7 is the storage modulus figure of TPS, TPS-ZA1, TPS-ZA3 and TPS-ZA5, be (c) TPS-ZA3,
The storage modulus figure of TPS-ZA3-W5 and TPS-ZA3-W10 is (b) loss angle of TPS, TPS-ZA1, TPS-ZA3 and TPS-ZA5
Tangent is (d) loss angle tangent of TPS-ZA3, TPS-ZA3-W5 and TPS-ZA3-W10.
Fig. 8 is the surface contact angle of TPS, TPS-ZA1, TPS-ZA3, TPS-ZA5, TPS-ZA3-W5 and TPS-ZA3-W10
Figure.
The mechanical property figure for the TPS-ZAx (x=1,3,5) that Fig. 9 is TPS and Examples 1 to 3 is prepared, wherein most upper
The line segment in face corresponds to tensile strength, and intermediate line segment corresponds to elasticity modulus, and nethermost line segment corresponds to impact strength, abscissa
0 corresponding TPS, 1,3 and 5 respectively correspond TPS-ZA1, TPS-ZA3 and TPS-ZA5.
Specific embodiment
Below with reference to embodiment, present invention is further described in detail, and embodiments of the present invention are not limited thereto.
Starch involved in the following example is cornstarch, is bought in Shandong Heng Ren Trade Co., Ltd.；The glycerol
It buys in Tianjin Jin Dong Tian Zheng fine chemistry chemical reagent work；The acetic anhydride zinc purchase is in the limited public affairs of Shanghai Mike's woods biochemical technology
Department；The double screw extruder purchase is in Nanjing Cenmen Machinery Ltd., model SHJ-26.The double screw extruder
Running parameter are as follows: the 1st area is 90 DEG C, and the 2nd area is 120 DEG C, and the 3rd area is 130 DEG C, and the 4th area is 140 DEG C, and the 5th area is 145 DEG C, the
6th area are 145 DEG C, and the 7th area is 140 DEG C, and head temperature is 135 DEG C, 80 revs/min of screw speed.
Embodiment 1
By starch in 110 DEG C of dry 4h, then it is pre-mixed with glycerol 7:3 in mass ratio；It adds and accounts for starch quality 1%
Acetic anhydride zinc (ZA), is further mixed to get mixture, and mixture is then passed through double screw extruder reactive extrursion, is cut
Grain obtains the thermoplastic starch (being denoted as TPS-ZA1) based on coordination effect.TPS-ZA1 is placed in Soxhlet extractor, with
Dehydrated alcohol is solvent, and the thermoplastic starch based on coordination effect that can be obtained purifying after purification 48h at 95 DEG C (is denoted as
CS/ZA1)。
Embodiment 2
By starch in 110 DEG C of dry 4h, then it is pre-mixed with glycerol 7:3 in mass ratio；It adds and accounts for starch quality 3%
Acetic anhydride zinc (ZA), is further mixed to get mixture, and mixture is then passed through double screw extruder reactive extrursion, is cut
Grain obtains the thermoplastic starch (being denoted as TPS-ZA3) based on coordination effect.TPS-ZA3 is placed in Soxhlet extractor, with
Dehydrated alcohol is solvent, and the thermoplastic starch based on coordination effect that can be obtained purifying after purification 48h at 95 DEG C (is denoted as
CS/ZA3)。
Embodiment 3
By starch in 110 DEG C of dry 4h, then it is pre-mixed with glycerol 7:3 in mass ratio；It adds and accounts for starch quality 5%
Acetic anhydride zinc (ZA), is further mixed to get mixture, and mixture is then passed through double screw extruder reactive extrursion, is cut
Grain obtains the thermoplastic starch (being denoted as TPS-ZA5) based on coordination effect.TPS-ZA5 is placed in Soxhlet extractor, with
Dehydrated alcohol is solvent, and the thermoplastic starch based on coordination effect that can be obtained purifying after purification 48h at 95 DEG C (is denoted as
CS/ZA5)。
Embodiment 4
By starch in 110 DEG C of dry 4h, then it is pre-mixed with glycerol and water 7:3:0.35 in mass ratio；It adds and accounts for starch
The acetic anhydride zinc (ZA) of quality 3%, is further mixed to get mixture, then reacts mixture by double screw extruder
It squeezes out, pelletizing, obtains the thermoplastic starch (being denoted as TPS-ZA3-W5) based on coordination effect.TPS-ZA3-W5 is placed in rope
In family name's extractor, using dehydrated alcohol as solvent, the thermoplastic based on coordination effect of purifying can be obtained after purification 48h at 95 DEG C
Property starch (being denoted as CS/ZA3-W5).
Embodiment 5
By starch in 110 DEG C of dry 4h, then it is pre-mixed with glycerol and water 7:3:0.7 in mass ratio；It adds and accounts for starch
The acetic anhydride zinc (ZA) of quality 3%, is further mixed to get mixture, then reacts mixture by double screw extruder
It squeezes out, pelletizing, obtains the thermoplastic starch (TPS-ZA3-W10) based on coordination effect.TPS-ZA3-W10 is placed in Soxhlet
In extractor, using dehydrated alcohol as solvent, the thermoplasticity based on coordination effect of purifying can be obtained after purification 48h at 95 DEG C
Starch (is denoted as CS/ZA3-W10).
Comparative example 1
By starch in 110 DEG C of dry 4h, starch and glycerol 7:3 in mass ratio are pre-mixed, twin-screw extrusion is then passed through
Machine reactive extrursion, pelletizing obtain thermoplastic starch (being denoted as TPS), and TPS is placed in Soxhlet extractor, are molten with dehydrated alcohol
Agent can be obtained the thermoplastic starch (being denoted as CS) of purifying at 95 DEG C after purification 48h.
In aforesaid operations, purification is in order to remove plasticizer and remaining zinc acetate, to prevent influencing experimental result.
Fig. 1 is CS, the infrared spectrogram of ZA (acetic anhydride zinc) and CS/ZA1, CS/ZA3 and CS/ZA5, wherein (a) is red
External spectrum total figure；It (b) is partial enlarged view.As shown in Figure 1: Zn2+It is successfully introduced on starch molecular chain, is weakened by coordinate bond
Original hydrogen bond action between starch molecule.
Fig. 2 is CS, the x-ray photoelectron spectroscopy figure of ZA (acetic anhydride zinc) and CS/ZA5, wherein (a1)、(b1) be respectively
The C of CS1s、O1sSpectrogram；(a2)、(b2) be respectively ZA C1s、O1sSpectrogram；(a3)、(b3) be respectively CS/ZA5 C1s、O1sSpectrogram.
As shown in Figure 2: compared with CS, the C of CS/ZA51sAnd O1sIn conjunction with can shift, and there is the feature O of O-Zn key1sPeak is said
Bright Zn2+(offset of O2, O3, O4 characteristic peak is the most obvious, for the oxygen atom for being primarily involved in complexation reaction with starch hydroxyl oxygen atom.)
Complexation reaction has occurred.
Fig. 3 is CS, the Zn of ZA (acetic anhydride zinc), CS/ZA1, CS/ZA3 and CS/ZA52pX-ray photoelectron spectroscopy figure.
As shown in Figure 3: the Zn with the increase of ZA content, in CS/ZAx (x=1,3,5)2pCharacteristic peak is gradually moved to low combination energy direction
It is dynamic, this is because complexation reaction makes oxygen atom outer-shell electron, the unoccupied orbital of zinc atom is moved to, increases the outer layer of zinc atom
Electron density, screen effect enhancing reduce the combination of its inner electron can.
Fig. 4 is the hydrogen nuclear magnetic resonance spectrogram of CS, CS/ZA3 and CS/ZA5, wherein the part of (a) corresponding 1st dotted line frame
Enlarged drawing, (b) partial enlarged view of corresponding 2nd dotted line frame, (c) partial enlarged view of corresponding 3rd dotted line frame.It can by Fig. 4
Know: with the increase of ZA content, H signal peak on the position 3* gradually wideization illustrates Zn2+Mainly with the 3 of starch glucose monomer
Number hydroxyl oxygen is coordinated.
The transmission electron microscope figure for the TPS-ZA5 that Fig. 5 is TPS and embodiment 3 is prepared, wherein (a1) and (a2) right
TPS is answered, (b1) and (b2) TPS-ZA5 is corresponded to, circular dashed line, which encloses, to be zinc ion cluster dark space (Zn2+Cluster), by Fig. 5
Known to: for TPS, there is apparent size in the zinc ion cluster dark space of 50~200nm in TPS-ZA5.
Fig. 6 is the scanning electron microscope diagram of TPS, CS/ZA1, CS/ZA3 and CS/ZA5.Wherein, (a1)~(a2) corresponding
TPS；(b1)~(b2) correspond to TPS-ZA1；(c1)~(c2) correspond to TPS-ZA3；(d1)~(d2) correspond to TPS-ZA5.It can by Fig. 6
Know: with the increase of ZA content, gradually appearing coarse particle aggregation area in the section of TPS-ZAx (x=1,3,5), this can return
It ties in starch and the strong complexation reaction of zinc ion cluster, and then forms fine and close network structure.
(a) in Fig. 7 is the storage modulus figure of TPS, TPS-ZA1, TPS-ZA3 and TPS-ZA5, be (c) TPS-ZA3,
The storage modulus figure of TPS-ZA3-W5 and TPS-ZA3-W10 is (b) loss angle of TPS, TPS-ZA1, TPS-ZA3 and TPS-ZA5
Tangent is (d) loss angle tangent of TPS-ZA3, TPS-ZA3-W5 and TPS-ZA3-W510.As shown in Figure 7: TPS-ZA1, TPS-
The modulus of ZA3, TPS-ZA5, TPS-ZA3-W5 and TPS-ZA3-W10 still maintain high value, while its vitrifying in high-temperature region
Transition temperature is increase gradually to 85~90 DEG C by 48.1 DEG C of TPS.
Fig. 8 is the surface contact angle of TPS, TPS-ZA1, TPS-ZA3, TPS-ZA5, TPS-ZA3-W5 and TPS-ZA3-W10
Figure.As shown in Figure 8: its surface contact angle of the thermoplastic starch based on coordination effect that the present invention is prepared is by 55.9 ° of TPS
It is increase gradually to 110~118 °.
The mechanical property figure for the TPS-ZAx (x=1,3,5) that Fig. 9 is TPS and Examples 1 to 3 is prepared, wherein most upper
The line segment in face corresponds to tensile strength, and intermediate line segment corresponds to elasticity modulus, and nethermost line segment corresponds to impact strength, abscissa
0 corresponding TPS, 1,3 and 5 respectively correspond TPS-ZA1, TPS-ZA3 and TPS-ZA5.Extension test according to GB/T1040-2006 into
Row, speed 5mm/min；Nick break test is carried out according to GB/T1843-2008.As shown in Figure 7: TPS-ZAx (x=1,3,
5) tensile strength is increase gradually to 8~9MPa, and impact strength does not reduce.
Above-described embodiment is only preferrred embodiment of the present invention, can not limit practical range of the invention.That is, other
Any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention should be equivalent
Substitute mode is included within the scope of the present invention.
Claims (10)
1. a kind of preparation method of the thermoplastic starch based on coordination effect, which comprises the steps of: by starch and
Plasticizer premixing, obtains pre-composition, adds acetic anhydride zinc and further mix, the quality of the starch and acetic anhydride zinc
Than for 100:1~100:5, subsequent extruding pelletization obtains the thermoplastic starch based on coordination effect.
2. a kind of preparation method of the thermoplastic starch based on coordination effect according to claim 1, which is characterized in that described
The mass ratio of starch and acetic anhydride zinc is 100:3.
3. a kind of preparation method of thermoplastic starch based on coordination effect according to claim 1 or claim 2, which is characterized in that
The mass ratio of the starch and plasticizer is 3:2~4:1.
4. a kind of preparation method of thermoplastic starch based on coordination effect according to claim 1 or claim 2, which is characterized in that
The plasticizer is at least one of glycerol, water and urea.
5. a kind of preparation method of the thermoplastic starch based on coordination effect according to claim 3, which is characterized in that described
The temperature of extruding pelletization is 90~145 DEG C；Reporting for the extruding pelletization is 70~90 revs/min.
6. a kind of preparation method of the thermoplastic starch based on coordination effect according to claim 1, which is characterized in that described
Starch is using preceding 4~8h dry at 80~120 DEG C.
7. a kind of preparation method of thermoplastic starch based on coordination effect according to claim 1 or claim 2, which is characterized in that
The starch is one or more of wheaten starch, cornstarch and potato starch；The extruding pelletization is using single
Screw extruder or double screw extruder.
8. a kind of preparation method of the thermoplastic starch based on coordination effect according to claim 1, which is characterized in that described
The preparation method of thermoplastic starch based on coordination effect further includes by the thermoplastic starch based on coordination effect obtained
Carry out purification processes.
9. a kind of any one of claim 1~8 preparation method of the thermoplastic starch based on coordination effect is prepared
Thermoplastic starch based on coordination effect.
10. described in claim 9 based on the thermoplastic starch of coordination effect in packaging, disposable tableware and agricultural mulching field
Application.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113024896A (en) * | 2019-12-25 | 2021-06-25 | 南通汇统塑胶机械有限公司 | Biodegradable preservative film and preparation method thereof |
| CN114230744A (en) * | 2022-01-19 | 2022-03-25 | 广东安拓普聚合物科技有限公司 | Starch-based elastomer and preparation method and application thereof |
| CN116656011A (en) * | 2023-06-25 | 2023-08-29 | 广州纳研新材料科技有限公司 | High-temperature-resistant high-humidity-resistant high-mechanical-property low-migration-capacity PBAT/TPS composite material and preparation and application thereof |
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| CN114230744A (en) * | 2022-01-19 | 2022-03-25 | 广东安拓普聚合物科技有限公司 | Starch-based elastomer and preparation method and application thereof |
| CN114230744B (en) * | 2022-01-19 | 2024-02-23 | 广东安拓普聚合物科技股份有限公司 | Starch-based elastomer and preparation method and application thereof |
| CN116656011A (en) * | 2023-06-25 | 2023-08-29 | 广州纳研新材料科技有限公司 | High-temperature-resistant high-humidity-resistant high-mechanical-property low-migration-capacity PBAT/TPS composite material and preparation and application thereof |
| CN116656011B (en) * | 2023-06-25 | 2024-07-02 | 广州纳研新材料科技有限公司 | High-temperature-resistant high-humidity-resistant high-mechanical-property low-migration-capacity PBAT/TPS composite material and preparation and application thereof |
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