CN112724472A - Full-biodegradable film blowing material with high starch content and preparation method thereof - Google Patents
Full-biodegradable film blowing material with high starch content and preparation method thereof Download PDFInfo
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- CN112724472A CN112724472A CN202011605198.8A CN202011605198A CN112724472A CN 112724472 A CN112724472 A CN 112724472A CN 202011605198 A CN202011605198 A CN 202011605198A CN 112724472 A CN112724472 A CN 112724472A
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- 229920002472 Starch Polymers 0.000 title claims abstract description 76
- 235000019698 starch Nutrition 0.000 title claims abstract description 76
- 239000008107 starch Substances 0.000 title claims abstract description 76
- 239000000463 material Substances 0.000 title claims abstract description 52
- 238000010096 film blowing Methods 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 229920000229 biodegradable polyester Polymers 0.000 claims abstract description 14
- 239000004622 biodegradable polyester Substances 0.000 claims abstract description 14
- 239000003607 modifier Substances 0.000 claims abstract description 14
- 239000004014 plasticizer Substances 0.000 claims abstract description 14
- 229920000881 Modified starch Polymers 0.000 claims abstract description 13
- 239000004368 Modified starch Substances 0.000 claims abstract description 13
- 239000011256 inorganic filler Substances 0.000 claims abstract description 13
- 229910003475 inorganic filler Inorganic materials 0.000 claims abstract description 13
- 235000019426 modified starch Nutrition 0.000 claims abstract description 13
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 12
- 230000004907 flux Effects 0.000 claims abstract description 9
- 238000012545 processing Methods 0.000 claims abstract description 8
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 26
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 26
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 18
- 229920001592 potato starch Polymers 0.000 claims description 15
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical compound NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 claims description 14
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 13
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 13
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 13
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 13
- -1 polybutylene adipate Polymers 0.000 claims description 13
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims description 12
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims description 12
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims description 12
- 239000005642 Oleic acid Substances 0.000 claims description 12
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims description 12
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 12
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims description 12
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 10
- 229920002261 Corn starch Polymers 0.000 claims description 8
- 244000017020 Ipomoea batatas Species 0.000 claims description 8
- 235000002678 Ipomoea batatas Nutrition 0.000 claims description 8
- 239000008120 corn starch Substances 0.000 claims description 8
- 229920000747 poly(lactic acid) Polymers 0.000 claims description 8
- 229920002961 polybutylene succinate Polymers 0.000 claims description 8
- 239000004631 polybutylene succinate Substances 0.000 claims description 8
- 239000004626 polylactic acid Substances 0.000 claims description 8
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 claims description 8
- 240000003183 Manihot esculenta Species 0.000 claims description 7
- 235000016735 Manihot esculenta subsp esculenta Nutrition 0.000 claims description 7
- QYMGIIIPAFAFRX-UHFFFAOYSA-N butyl prop-2-enoate;ethene Chemical compound C=C.CCCCOC(=O)C=C QYMGIIIPAFAFRX-UHFFFAOYSA-N 0.000 claims description 7
- 229920006245 ethylene-butyl acrylate Polymers 0.000 claims description 7
- VOZRXNHHFUQHIL-UHFFFAOYSA-N glycidyl methacrylate Chemical compound CC(=C)C(=O)OCC1CO1 VOZRXNHHFUQHIL-UHFFFAOYSA-N 0.000 claims description 7
- AXKZIDYFAMKWSA-UHFFFAOYSA-N 1,6-dioxacyclododecane-7,12-dione Chemical compound O=C1CCCCC(=O)OCCCCO1 AXKZIDYFAMKWSA-UHFFFAOYSA-N 0.000 claims description 4
- WSQZNZLOZXSBHA-UHFFFAOYSA-N 3,8-dioxabicyclo[8.2.2]tetradeca-1(12),10,13-triene-2,9-dione Chemical compound O=C1OCCCCOC(=O)C2=CC=C1C=C2 WSQZNZLOZXSBHA-UHFFFAOYSA-N 0.000 claims description 4
- IFSIGZHEDOYNJM-UHFFFAOYSA-N n,n-dimethylformamide;ethane-1,2-diol Chemical compound OCCO.CN(C)C=O IFSIGZHEDOYNJM-UHFFFAOYSA-N 0.000 claims description 4
- 229920005586 poly(adipic acid) Polymers 0.000 claims description 4
- 229920001707 polybutylene terephthalate Polymers 0.000 claims description 4
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 3
- 239000004202 carbamide Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 3
- 229920006242 ethylene acrylic acid copolymer Polymers 0.000 claims description 3
- PYGSKMBEVAICCR-UHFFFAOYSA-N hexa-1,5-diene Chemical group C=CCCC=C PYGSKMBEVAICCR-UHFFFAOYSA-N 0.000 claims description 3
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 3
- 229940057995 liquid paraffin Drugs 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 3
- 238000003756 stirring Methods 0.000 abstract description 5
- 238000005469 granulation Methods 0.000 abstract description 2
- 230000003179 granulation Effects 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 abstract 1
- 235000011187 glycerol Nutrition 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 239000002985 plastic film Substances 0.000 description 4
- 229920006255 plastic film Polymers 0.000 description 4
- 238000004806 packaging method and process Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002667 nucleating agent Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L3/00—Compositions of starch, amylose or amylopectin or of their derivatives or degradation products
- C08L3/02—Starch; Degradation products thereof, e.g. dextrin
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- 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
-
- 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
-
- 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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Biological Depolymerization Polymers (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention belongs to the field of bio-based composite materials, and particularly relates to a full-biodegradable film blowing material with high starch content, which comprises the following components in percentage by mass: 50-80% of starch, 5-30% of biodegradable polyester, 3-10% of phase flux, 3-10% of plasticizer, 3-10% of starch modifier and 5-20% of inorganic filler; the preparation method comprises the following steps: adding starch, a starch modifier and a plasticizer into a high-speed mixer, heating and uniformly stirring at a high speed to prepare modified starch; adding the biodegradable polyester, the phase flux and the inorganic filler into the modified starch, and heating and uniformly stirring at a low speed by a high-speed mixer to prepare a mixed master batch; and finally adding the mixed master batch into a stretching rheometer for plasticizing and extruding, and then granulating. The invention modifies starch by plasticizer and starch modifier, then mixes with biodegradable polyester, phase flux and inorganic filler for granulation to prepare the full-biodegradable blown film material with high starch content, which can improve the starch content to 50-80%, reduce cost and ensure the processing performance and material strength.
Description
Technical Field
The invention belongs to the technical field of film blowing materials, and particularly relates to a full-biodegradable film blowing material with high starch content and a preparation method thereof.
Background
With the development of the plastic industry and the development of plastic varieties, more and more plastic products become indispensable materials in human lives. Plastic film bags are widely applied to the fields of food packaging, medical packaging, industrial packaging and the like, and particularly, disposable shopping bags, disposable garbage bags and other products have wide application markets, but the traditional plastics are difficult to biodegrade, and the environment is seriously polluted by the large stacking of plastic wastes. Therefore, the research on the fully biodegradable materials, especially the fully biodegradable blown film materials, is a hot topic at present. Due to the change of foreign situation, the raw material price of the biodegradable material is high, even the market supply can not be met, so the starch-based fully biodegradable material is produced at the same time. Starch, as an agricultural product with low price and rich sources, becomes a main raw material for developing biodegradable materials, but the starch content in the fully-degradable film blowing materials in the current market is generally lower than 50%, and the effect of reducing the cost cannot be achieved. The starch content exceeding 50 percent has a series of problems of poor processing performance, reduced material strength and the like.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide the full-biodegradable film blowing material with high starch content, which can reduce the cost and ensure the processing performance and the material strength.
In order to achieve the aim, the technical scheme of the invention is that the full-biodegradable film blowing material with high starch content comprises the following components in percentage by mass: 50-80% of starch, 5-30% of biodegradable polyester, 3-10% of phase flux, 3-10% of plasticizer, 3-10% of starch modifier and 5-20% of inorganic filler; the plasticizer is one or more of glycerol, glycol, formamide, urea and ethylene glycol dimethyl formamide; the starch modifier is one or more of oleic acid, maleic anhydride and liquid paraffin.
Further, the starch is one or more of corn starch, potato starch, sweet potato starch and cassava starch.
Further, the biodegradable polyester is one or more of polylactic acid, polybutylene adipate/terephthalate and polybutylene succinate.
Further, the phase fusing agent is any one of ethylene butyl acrylate grafted glycidyl methacrylate, ethylene-acrylic acid copolymer and ethylene-vinyl acetate copolymer.
Further, the inorganic filler is one of calcium carbonate, talcum powder and montmorillonite.
Preferably, the high-starch-content full-biodegradable blown film material comprises the following components in percentage by mass: 70% of corn starch, 10% of polylactic acid, 5% of ethylene-vinyl acetate copolymer, 5% of glycerol, 5% of maleic anhydride and 5% of calcium carbonate.
Preferably, the high-starch-content full-biodegradable blown film material comprises the following components in percentage by mass: 40% of cassava starch, 40% of potato starch, 5% of poly (butylene adipate)/terephthalate, 3% of ethylene butyl acrylate grafted glycidyl methacrylate, 1% of ethylene glycol, 2% of formamide, 3% of oleic acid and 6% of talcum powder.
Preferably, the high-starch-content full-biodegradable blown film material comprises the following components in percentage by mass: 50% of sweet potato starch, 10% of polybutylene succinate, 5% of poly adipic acid/butylene terephthalate, 10% of ethylene-vinyl acetate copolymer, 7% of ethylene-diethylene diamine, 4% of oleic acid, 4% of maleic anhydride, 4% of calcium carbonate and 6% of talcum powder.
The invention also provides a preparation method of the full-biodegradable film blowing material with high starch content, which comprises the following steps:
1) adding starch, plasticizer and starch modifier into a high-speed mixer, heating at 100 deg.C, rotating at 500rpm, and mixing for 15-30min to obtain modified starch;
2) adding biodegradable polyester, a phase flux and an inorganic filler into the modified starch, heating by a high-speed mixer at 100 ℃, rotating at 200rpm, and mixing for 1-5min to prepare a mixed master batch;
3) and adding the mixed master batch into a stretching rheometer for plasticizing and extruding, and then granulating to obtain the full-biodegradable film blowing material with high starch content.
Further, the processing temperature for plasticizing in the draw-out rheometer in step 3) is 150-190 ℃.
Compared with the prior art, the invention has the following beneficial effects:
after the starch is modified by the plasticizer and the starch modifier, the modified starch is mixed with the biodegradable polyester, the phase flux and the inorganic filler for granulation to prepare the full-biodegradable film blowing material with high starch content, so that the starch content can be increased to 50-80%, the cost is reduced, and the processing performance and the material strength of the full-biodegradable film blowing material can be ensured; the starch modifier not only can change the hydrophilicity of the starch into hydrophobicity, improve the processing performance of the starch, but also can improve the compatibility with the biodegradable polyester; the proper addition of inorganic filler can improve the processing performance of the biodegradable polyester and can be used as a nucleating agent of polyester crystallization to improve the performance of the whole material.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a full-biodegradable film blowing material with high starch content, which comprises the following components in percentage by mass: 50-80% of starch, 5-30% of biodegradable polyester, 3-10% of phase flux, 3-10% of plasticizer, 3-10% of starch modifier and 5-20% of inorganic filler.
Wherein the starch is one or more of corn starch, potato starch, sweet potato starch and cassava starch; the biodegradable polyester is one or more of polylactic acid, polybutylene adipate/terephthalate and polybutylene succinate; the phase fusing agent is any one of ethylene butyl acrylate grafted glycidyl methacrylate, ethylene-acrylic acid copolymer and ethylene-vinyl acetate copolymer; the plasticizer is one or more of glycerol, glycol, formamide, urea and ethylene glycol dimethyl formamide; the starch modifier is one or more of oleic acid, maleic anhydride and liquid paraffin; the inorganic filler is one of calcium carbonate, talcum powder and montmorillonite.
The technical effect of the inventive fully biodegradable blown film material with high starch content is illustrated by the following specific examples.
Example 1
The embodiment provides a full-biodegradable film blowing material with high starch content, which comprises the following components in percentage by mass: 70% of corn starch, 10% of polylactic acid, 5% of ethylene-vinyl acetate copolymer, 5% of glycerol, 5% of maleic anhydride and 5% of calcium carbonate.
The preparation method of the full-biodegradable blown film material with high starch content comprises the following steps:
1) adding corn starch, glycerol and maleic anhydride into a high-speed mixer, heating, and uniformly stirring at a high speed, wherein the heating temperature of the high-speed mixer is 100 ℃, the rotating speed is 500rpm, and the mixing time is 30min, so as to prepare modified starch;
2) adding polylactic acid, ethylene-vinyl acetate copolymer and calcium carbonate into the modified starch, heating by a high-speed mixer at 100 ℃, rotating at 200rpm, and mixing for 5min to prepare a mixed master batch;
3) and adding the mixed master batch into a stretching rheometer for plasticizing and extruding, and then granulating to obtain the full-biodegradable film blowing material with high starch content.
Example 2
The embodiment provides a full-biodegradable film blowing material with high starch content, which comprises the following components in percentage by mass: 40% of cassava starch, 40% of potato starch, 5% of poly (butylene adipate)/terephthalate, 3% of ethylene butyl acrylate grafted glycidyl methacrylate, 1% of ethylene glycol, 2% of formamide, 3% of oleic acid and 6% of talcum powder.
The preparation method of the full-biodegradable blown film material with high starch content comprises the following steps:
1) adding cassava starch, potato starch, ethylene glycol, formamide and oleic acid into a high-speed mixer, heating and uniformly stirring at a high speed, wherein the heating temperature of the high-speed mixer is 100 ℃, the rotating speed is 500rpm, and the mixing time is 15min, so as to prepare modified starch;
2) adding polybutylene adipate/terephthalate, ethylene butyl acrylate grafted glycidyl methacrylate and talcum powder into the modified starch, heating by a high-speed mixer at 100 ℃, rotating at 200rpm, and mixing for 3min to prepare a mixed master batch;
3) and adding the mixed master batch into a stretching rheometer for plasticizing and extruding, and then granulating to obtain the full-biodegradable film blowing material with high starch content.
Example 3
The embodiment provides a full-biodegradable film blowing material with high starch content, which comprises the following components in percentage by mass: 50% of sweet potato starch, 10% of polybutylene succinate, 5% of poly adipic acid/butylene terephthalate, 10% of ethylene-vinyl acetate copolymer, 7% of ethylene-diethylene diamine, 4% of oleic acid, 4% of maleic anhydride, 4% of calcium carbonate and 6% of talcum powder.
The preparation method of the full-biodegradable blown film material with high starch content comprises the following steps:
1) adding sweet potato starch, ethylene glycol dimethyl formamide, oleic acid and maleic anhydride into a high-speed mixer, heating and uniformly stirring at a high speed, wherein the heating temperature of the high-speed mixer is 100 ℃, the rotating speed is 500rpm, and the mixing time is 20min, so as to prepare modified starch;
2) adding polybutylene succinate, poly (butylene adipate/terephthalate), ethylene-vinyl acetate copolymer, calcium carbonate and talcum powder into the modified starch, heating by a high-speed mixer at 100 ℃, rotating at 200rpm, and mixing for 1min to prepare a mixed master batch;
3) and adding the mixed master batch into a stretching rheometer for plasticizing and extruding, and then granulating to obtain the full-biodegradable film blowing material with high starch content.
Comparative example 1
The comparative example provides a full-biodegradable film blowing material, which comprises the following components in percentage by mass: 70% of corn starch, 10% of polylactic acid, 5% of ethylene-vinyl acetate copolymer, 10% of glycerol and 5% of calcium carbonate; the preparation was substantially the same as in example 1, except that the maleic anhydride in example 1 was replaced with glycerin.
Comparative example 2
The comparative example provides a full-biodegradable film blowing material, which comprises the following components in percentage by mass: 50% of sweet potato starch, 10% of polybutylene succinate, 5% of poly adipic acid/butylene terephthalate, 10% of ethylene-vinyl acetate copolymer, 15% of ethylene-dimethylene diamine, 4% of calcium carbonate and 6% of talcum powder; the preparation was substantially the same as in example 3, except that oleic acid and maleic anhydride were replaced with ethylenebisdimethylamide in example 3.
The performance of the plastic film bag products prepared from the fully biodegradable blown film materials prepared in the above examples 1 to 3 and comparative examples 1 to 2 was tested, and the results are shown in table 1.
TABLE 1 Properties of the Plastic film bag products
As can be seen from Table 1, the plasticizer and the starch modifier are adopted to modify the starch, compared with the method that the plasticizer is only adopted to modify the starch, the mechanical property of the prepared plastic film bag is more excellent, the content of the starch can be increased to 50-80%, and the cost is greatly reduced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The full-biodegradable film blowing material with high starch content is characterized by comprising the following components in percentage by mass: 50-80% of starch, 5-30% of biodegradable polyester, 3-10% of phase flux, 3-10% of plasticizer, 3-10% of starch modifier and 5-20% of inorganic filler; the plasticizer is one or more of glycerol, glycol, formamide, urea and ethylene glycol dimethyl formamide; the starch modifier is one or more of oleic acid, maleic anhydride and liquid paraffin.
2. The fully biodegradable blown film material with high starch content according to claim 1, wherein: the starch is one or more of corn starch, potato starch, sweet potato starch and cassava starch.
3. The fully biodegradable blown film material with high starch content according to claim 1, wherein: the biodegradable polyester is one or more of polylactic acid, polybutylene adipate/terephthalate and polybutylene succinate.
4. The fully biodegradable blown film material with high starch content according to claim 1, wherein: the phase fusing agent is any one of ethylene butyl acrylate grafted glycidyl methacrylate, ethylene-acrylic acid copolymer and ethylene-vinyl acetate copolymer.
5. The fully biodegradable blown film material with high starch content according to claim 1, wherein: the inorganic filler is one of calcium carbonate, talcum powder and montmorillonite.
6. The fully biodegradable blown film material with high starch content according to claim 1, wherein: comprises the following components in percentage by mass: 70% of corn starch, 10% of polylactic acid, 5% of ethylene-vinyl acetate copolymer, 5% of glycerol, 5% of maleic anhydride and 5% of calcium carbonate.
7. The fully biodegradable blown film material with high starch content according to claim 1, wherein: comprises the following components in percentage by mass: 40% of cassava starch, 40% of potato starch, 5% of poly (butylene adipate)/terephthalate, 3% of ethylene butyl acrylate grafted glycidyl methacrylate, 1% of ethylene glycol, 2% of formamide, 3% of oleic acid and 6% of talcum powder.
8. The fully biodegradable blown film material with high starch content according to claim 1, wherein: comprises the following components in percentage by mass: 50% of sweet potato starch, 10% of polybutylene succinate, 5% of poly adipic acid/butylene terephthalate, 10% of ethylene-vinyl acetate copolymer, 7% of ethylene-diethylene diamine, 4% of oleic acid, 4% of maleic anhydride, 4% of calcium carbonate and 6% of talcum powder.
9. The preparation method of the full-biodegradable film blowing material with high starch content according to any one of claims 1 to 8, characterized by comprising the following steps:
1) adding starch, plasticizer and starch modifier into a high-speed mixer, heating at 100 deg.C, rotating at 500rpm, and mixing for 15-30min to obtain modified starch;
2) adding biodegradable polyester, a phase flux and an inorganic filler into the modified starch, heating by a high-speed mixer at 100 ℃, rotating at 200rpm, and mixing for 1-5min to prepare a mixed master batch;
3) and adding the mixed master batch into a stretching rheometer for plasticizing and extruding, and then granulating to obtain the full-biodegradable film blowing material with high starch content.
10. The method for preparing the full-biodegradable blown film material with high starch content according to claim 9, wherein the method comprises the following steps: the processing temperature for plasticizing in the drawing rheometer in the step 3) is 150-190 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011605198.8A CN112724472A (en) | 2020-12-29 | 2020-12-29 | Full-biodegradable film blowing material with high starch content and preparation method thereof |
Applications Claiming Priority (1)
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| WO2024074562A1 (en) | 2022-10-06 | 2024-04-11 | Basf Se | Thermoplastic polymer blend and use thereof |
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