CN113896954A - Biodegradable film with lactic acid bacteria and polyesters as main materials and manufacturing method thereof - Google Patents
Biodegradable film with lactic acid bacteria and polyesters as main materials and manufacturing method thereof Download PDFInfo
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- CN113896954A CN113896954A CN202111331987.1A CN202111331987A CN113896954A CN 113896954 A CN113896954 A CN 113896954A CN 202111331987 A CN202111331987 A CN 202111331987A CN 113896954 A CN113896954 A CN 113896954A
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- biodegradable film
- lactic acid
- polyesters
- acid bacteria
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- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 title claims abstract description 92
- 229920000728 polyester Polymers 0.000 title claims abstract description 69
- 239000004310 lactic acid Substances 0.000 title claims abstract description 46
- 235000014655 lactic acid Nutrition 0.000 title claims abstract description 46
- 241000894006 Bacteria Species 0.000 title claims abstract description 37
- 239000000463 material Substances 0.000 title claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 239000000835 fiber Substances 0.000 claims abstract description 31
- -1 polybutylene carbonate Polymers 0.000 claims abstract description 27
- 239000011256 inorganic filler Substances 0.000 claims abstract description 18
- 229910003475 inorganic filler Inorganic materials 0.000 claims abstract description 18
- 229920002472 Starch Polymers 0.000 claims abstract description 15
- 239000008107 starch Substances 0.000 claims abstract description 15
- 235000019698 starch Nutrition 0.000 claims abstract description 15
- QZCLKYGREBVARF-UHFFFAOYSA-N Acetyl tributyl citrate Chemical compound CCCCOC(=O)CC(C(=O)OCCCC)(OC(C)=O)CC(=O)OCCCC QZCLKYGREBVARF-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229920000747 poly(lactic acid) Polymers 0.000 claims description 24
- 239000004626 polylactic acid Substances 0.000 claims description 24
- 238000010096 film blowing Methods 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 14
- 239000000047 product Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims description 12
- 239000008103 glucose Substances 0.000 claims description 12
- 239000011347 resin Substances 0.000 claims description 12
- 229920005989 resin Polymers 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 10
- 238000002844 melting Methods 0.000 claims description 10
- 230000008018 melting Effects 0.000 claims description 10
- 238000007639 printing Methods 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 8
- 238000000855 fermentation Methods 0.000 claims description 8
- 230000004151 fermentation Effects 0.000 claims description 8
- JJTUDXZGHPGLLC-UHFFFAOYSA-N lactide Chemical compound CC1OC(=O)C(C)OC1=O JJTUDXZGHPGLLC-UHFFFAOYSA-N 0.000 claims description 8
- 239000000178 monomer Substances 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 8
- 239000004970 Chain extender Substances 0.000 claims description 7
- 239000003963 antioxidant agent Substances 0.000 claims description 7
- 230000003078 antioxidant effect Effects 0.000 claims description 7
- 239000002667 nucleating agent Substances 0.000 claims description 7
- 239000003381 stabilizer Substances 0.000 claims description 7
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 claims description 6
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 6
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 claims description 6
- PPQREHKVAOVYBT-UHFFFAOYSA-H dialuminum;tricarbonate Chemical compound [Al+3].[Al+3].[O-]C([O-])=O.[O-]C([O-])=O.[O-]C([O-])=O PPQREHKVAOVYBT-UHFFFAOYSA-H 0.000 claims description 6
- 229920001707 polybutylene terephthalate Polymers 0.000 claims description 4
- 238000000746 purification Methods 0.000 claims description 4
- 238000007142 ring opening reaction Methods 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- 239000005995 Aluminium silicate Substances 0.000 claims description 3
- 229920001634 Copolyester Polymers 0.000 claims description 3
- 239000005057 Hexamethylene diisocyanate Substances 0.000 claims description 3
- 239000005058 Isophorone diisocyanate Substances 0.000 claims description 3
- 229920003232 aliphatic polyester Polymers 0.000 claims description 3
- 235000012211 aluminium silicate Nutrition 0.000 claims description 3
- 229940118662 aluminum carbonate Drugs 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims description 3
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 3
- 235000013539 calcium stearate Nutrition 0.000 claims description 3
- 239000008116 calcium stearate Substances 0.000 claims description 3
- 239000006229 carbon black 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
- 229910052621 halloysite Inorganic materials 0.000 claims description 3
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 claims description 3
- 229910052588 hydroxylapatite Inorganic materials 0.000 claims description 3
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 claims description 3
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 3
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 3
- YTXCAJNHPVBVDJ-UHFFFAOYSA-N octadecyl propanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CC YTXCAJNHPVBVDJ-UHFFFAOYSA-N 0.000 claims description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 claims description 3
- 229920002215 polytrimethylene terephthalate Polymers 0.000 claims description 3
- 239000011265 semifinished product Substances 0.000 claims description 3
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 239000011787 zinc oxide Substances 0.000 claims description 3
- 235000014692 zinc oxide Nutrition 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 abstract description 6
- 238000003912 environmental pollution Methods 0.000 abstract description 6
- 239000000126 substance Substances 0.000 abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 5
- 241000195493 Cryptophyta Species 0.000 abstract description 5
- 229910052799 carbon Inorganic materials 0.000 abstract description 5
- 244000005700 microbiome Species 0.000 abstract description 5
- 239000002985 plastic film Substances 0.000 description 6
- 229920006255 plastic film Polymers 0.000 description 6
- 229920003023 plastic Polymers 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 238000000354 decomposition reaction Methods 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- HPTYUNKZVDYXLP-UHFFFAOYSA-N aluminum;trihydroxy(trihydroxysilyloxy)silane;hydrate Chemical compound O.[Al].[Al].O[Si](O)(O)O[Si](O)(O)O HPTYUNKZVDYXLP-UHFFFAOYSA-N 0.000 description 2
- 229920000704 biodegradable plastic Polymers 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical compound [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 229920002292 Nylon 6 Polymers 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2303/00—Characterised by the use of starch, amylose or amylopectin or of their derivatives or degradation products
- C08J2303/02—Starch; Degradation products thereof, e.g. dextrin
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2467/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2469/00—Characterised by the use of polycarbonates; Derivatives of polycarbonates
-
- 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
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/325—Calcium, strontium or barium phosphate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- 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
- C08K3/34—Silicon-containing compounds
-
- 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
- C08K5/10—Esters; Ether-esters
- C08K5/11—Esters; Ether-esters of acyclic polycarboxylic acids
-
- 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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
- C08K7/26—Silicon- containing compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to the technical field of biodegradable films, and discloses a biodegradable film taking lactic acid bacteria and polyesters as main materials and a manufacturing method thereof, wherein the biodegradable film comprises the following components in parts by weight: 45-55 parts of starch, 20-35 parts of lactic acid bacteria, 42-50 parts of polyesters, 13-21 parts of polybutylene carbonate, 30-35 parts of polyester fiber, 6-9 parts of acetyl tributyl citrate and 10-20 parts of inorganic filler. The biodegradable film taking the lactic acid bacteria and the polyesters as the main materials and the manufacturing method thereof have excellent service performance, can be completely decomposed by microorganisms and algae existing in the nature after being discarded, and finally become a product with carbon circulation in the nature by inorganic treatment, and completely has no harmful substance residue, thereby not causing environmental pollution, improving the environmental protection performance of the biodegradable film, effectively improving the tensile strength and the impact strength of the biodegradable film, and improving the reliability of the use of the biodegradable film, and the manufacturing method is simple, convenient and efficient.
Description
Technical Field
The invention relates to the technical field of biodegradable films, in particular to a biodegradable film taking lactic acid bacteria and polyesters as main materials and a manufacturing method thereof.
Background
Petroleum resources are used as raw materials to produce a large amount of polyolefins such as polyvinyl chloride, polyethylene, polypropylene and the like, polyesters such as polystyrene, polyethylene terephthalate, polybutylene terephthalate and the like, polyamides such as polyamide 6 and other various plastics, and the plastics are generally stable and not easily decomposed in natural environment, so that a part of products containing the plastics are recycled after use, but most of the products are incinerated, carbon dioxide generated by incineration becomes one of causes of global warming, and halogen-containing plastics such as polyvinyl chloride and plastics containing different atoms such as nitrogen, phosphorus, sulfur and the like are easily incinerated to generate harmful gases, thereby causing great environmental pollution.
The traditional plastic film has the conditions of long decomposition time and incomplete decomposition in a natural environment after being used, so that the environmental pollution is easily caused, the environmental protection performance of the plastic film is further influenced, and the plastic film also has the characteristics of weak tensile strength and weak impact strength in the using process and influences the use reliability of the plastic film.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a biodegradable film taking lactic acid bacteria and polyesters as main materials and a manufacturing method thereof, the biodegradable film has excellent service performance, can be completely decomposed by microorganisms and algae existing in the nature after being discarded, is finally inorganized into a product with carbon circulation in the nature, has no harmful substance residue at all, further does not cause environmental pollution, improves the environmental protection performance of the biodegradable film, can effectively improve the tensile strength and the impact strength of the biodegradable film, improves the reliability of the biodegradable film in use and the like, solves the problems of long decomposition time and incomplete decomposition after the use of the existing plastic film, and solves the problems of weak tensile strength and weak impact strength of the plastic film in the use process.
(II) technical scheme
In order to realize the purposes that the biodegradable film has excellent use performance, can be completely decomposed by microorganisms and algae existing in the nature after being discarded, is finally inorganized into a product which has carbon circulation in the nature and has no harmful substance residue, further causes no environmental pollution, improves the environmental protection performance of the biodegradable film, can effectively improve the tensile strength and the impact strength of the biodegradable film, and improves the use reliability of the biodegradable film, the invention provides the following technical scheme: a biodegradable film taking lactic acid bacteria and polyesters as main materials comprises the following components in parts by weight: 45-55 parts of starch, 20-35 parts of lactic acid bacteria, 42-50 parts of polyesters, 13-21 parts of polybutylene carbonate, 30-35 parts of polyester fiber, 6-9 parts of acetyl tributyl citrate and 10-20 parts of inorganic filler.
Preferably, the polyester comprises the following components in parts by weight: 70-85 parts of branched polyester, 11-13 parts of a chain extender, 8-12 parts of an antioxidant, 6-9 parts of a stabilizer and 10-15 parts of a nucleating agent.
Preferably, the polyester fiber is any one of polytrimethylene terephthalate fiber and polybutylene terephthalate fiber; the diameter of the polyester fiber is 0.9-2.6 microns.
Preferably, the long-chain branched polyester is prepared by uniformly mixing long-chain branched aliphatic polyester and long-chain branched aliphatic-aromatic copolyester according to the proportion of 3: 2.
Preferably, the chain extender is at least one of toluene diisocyanate, bischloroformate, hexamethylene diisocyanate and isophorone diisocyanate, the antioxidant is any two of bisphenol A phosphite, octadecyl propionate and dodecyl thiopropyl propionate, the stabilizer is at least one of calcium stearate, zinc oxide, kaolin and montmorillonite, and the nucleating agent is at least one of aluminum carbonate, terephthalic acid and aluminum oxide.
Preferably, the inorganic filler is any two of nano hydroxyapatite, nano halloysite and nano white carbon black.
The preparation method of the biodegradable film taking the lactic acid bacteria and the polyesters as the main materials comprises the following steps:
s1, preparing raw materials, namely weighing starch, lactic acid bacteria, polyesters, polybutylene carbonate, polyester fibers, acetyl tributyl citrate and inorganic filler according to parts by weight;
s2, preparing polylactic acid, namely preparing unrefined glucose from starch, adding the glucose into a fermentation tank, adding lactic acid bacteria into the fermentation tank, fermenting the glucose into lactic acid, concentrating the lactic acid to prepare lactide, performing vacuum purification on lactide monomers, and completing ring opening by a solvent-free dissolving process to polymerize the monomers into the polylactic acid;
s3, drying, namely drying the polylactic acid processed and prepared in the step S2 for 4 to 5 hours at the temperature of between 80 and 85 ℃ in a vacuum environment;
s4, mixing, namely pouring polylactic acid, polyesters, polybutylene carbonate, polyester fibers, acetyl tributyl citrate and inorganic filler into mixing equipment, and fully mixing for 1-1.5 hours;
s5, granulating, namely adding the raw materials mixed in the step S4 into a double-screw extruder to be extruded to form resin particles, wherein the melting temperature of the double-screw extruder is 175-225 ℃;
s6, blowing the film, namely conveying the semi-finished product resin granulated in the step S5 to a single-screw extruder for high-temperature melting, wherein the melting temperature is 195-230 ℃, conveying the melted resin to a film blowing machine through the screw extruder for film blowing, and cooling and shaping the biodegradable film blown out of the film blowing machine through cooling equipment;
s7, printing, namely conveying the biodegradable film produced by the film blowing in the step S6 to printing equipment for printing;
and S8, sealing, packaging and storing, namely winding the biodegradable film produced in the step S7 into a product, conveying the wound biodegradable film product into a sealing bag for drying, sealing and storing, and finally registering and warehousing the sealed biodegradable film product.
(III) advantageous effects
Compared with the prior art, the invention provides a biodegradable film taking lactic acid bacteria and polyesters as main materials and a manufacturing method thereof, and the biodegradable film has the following beneficial effects:
the biodegradable film with lactic acid bacteria and polyesters as main materials and the manufacturing method thereof are characterized in that the polyesters, starch and lactic acid bacteria are arranged, polylactic acid prepared from starch and lactic acid bacteria is blended with organic high molecular compounds with different components, so that the tensile strength of the biodegradable film can be ensured, the breaking elongation rate is improved, meanwhile, inorganic filler is added, hydroxyl groups contained in the inorganic filler can form strong hydrogen bonds with polylactic acid molecules, the mechanical strength of a filling system is high, the mechanical property is improved, the polylactic acid is attached to straightened polyester fibers in a tensile flow field to directly form a semi-crystalline structure, meanwhile, the selected polyester fibers are degradable fibers, the excellent degradable performance of the biodegradable film is kept, the biodegradable film is mainly prepared from the polyesters and the polylactic acid, and the polyesters and the polylactic acid can ensure that the biodegradable film can be completely decomposed by the lactic acid bacteria after being used, the biodegradable film is completely biodegradable plastic, has excellent use performance, can be completely decomposed by microorganisms and algae existing in the nature after being discarded, is finally inorganized into carbon circulation in the nature, has no product with harmful substance residue, further cannot cause environmental pollution, improves the environmental protection performance of the biodegradable film, can effectively improve the tensile strength and the impact strength of the biodegradable film, and improves the use reliability of the biodegradable film.
Detailed Description
The technical solutions in the embodiments of the present invention will be 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.
A biodegradable film taking lactic acid bacteria and polyesters as main materials comprises the following components in parts by weight: 48 parts of starch, 30 parts of lactic acid bacteria, 45 parts of polyester, 15 parts of polybutylene carbonate, 33 parts of polyester fiber, 8 parts of acetyl tributyl citrate and 16 parts of inorganic filler.
The polyester comprises the following components in parts by weight: 77 parts of branched polyester, 12 parts of chain extender, 11 parts of antioxidant, 8 parts of stabilizer and 135 parts of nucleating agent, wherein the polyester can increase the tensile strength of the film and ensure the use reliability of the film.
The polyester fiber is any one of polytrimethylene terephthalate fiber and polybutylene terephthalate fiber; the diameter of the polyester fiber is 1 micron, and the polyester fiber is also degradable fiber, so that the excellent degradable performance of the poly film is maintained.
The long branched polyester is prepared by uniformly mixing long branched aliphatic polyester and long branched aliphatic-aromatic copolyester according to the proportion of 3:2, wherein the long branched chain is in a branched polymer, the branched chain is divided into a long branched chain and a short branched chain according to the length of the branched chain, the length of the long branched chain is equivalent to that of a main chain, and the length of the short branched chain is similar to that of a longer side group, so that the mechanical property of the film can be ensured.
The chain extender is at least one of toluene diisocyanate, bischloroformate, hexamethylene diisocyanate and isophorone diisocyanate, the chain extender can ensure the reliable molding of resin, the antioxidant is any two of bisphenol A phosphite, octadecyl propionate and dodecyl thiopropyl propionate, the antioxidant is a substance capable of removing damage of free radicals to human bodies and ensures the use safety of the film, the stabilizer is at least one of calcium stearate, zinc oxide, kaolin and montmorillonite, the stabilizer can ensure the stable structure of the film and further ensures the reliable use of the film, the nucleating agent is at least one of aluminum carbonate, terephthalic acid and aluminum oxide, and the nucleating agent enables the film to have reliable mechanical properties.
The inorganic filler is any two of nano hydroxyapatite, nano halloysite and nano white carbon black.
The preparation method of the biodegradable film taking the lactic acid bacteria and the polyesters as the main materials comprises the following steps:
s1, preparing raw materials, namely weighing starch, lactic acid bacteria, polyesters, polybutylene carbonate, polyester fibers, acetyl tributyl citrate and inorganic filler according to parts by weight;
s2, preparing polylactic acid, namely preparing unrefined glucose from starch, adding the glucose into a fermentation tank, adding lactic acid bacteria into the fermentation tank, fermenting the glucose into lactic acid, concentrating the lactic acid to prepare lactide, performing vacuum purification on lactide monomers, and completing ring opening by a solvent-free dissolving process to polymerize the monomers into the polylactic acid;
s3, drying, namely drying the polylactic acid processed and prepared in the step S2 for 4.5 hours at 82 ℃ in a vacuum environment;
s4, mixing, namely pouring polylactic acid, polyesters, polybutylene carbonate, polyester fibers, acetyl tributyl citrate and inorganic filler into mixing equipment, and fully mixing for 1.3 hours;
s5, granulating, namely adding the raw materials mixed in the step S4 into a double-screw extruder to be extruded to form resin particles, wherein the melting temperature of the double-screw extruder is 200 ℃;
s6, blowing the film, namely conveying the semi-finished product resin granulated in the step S5 to a single-screw extruder for high-temperature melting, wherein the melting temperature is within 210 ℃, conveying the melted resin to a film blowing machine through the screw extruder for film blowing, and cooling and shaping the biodegradable film blown out of the film blowing machine through cooling equipment;
s7, printing, namely conveying the biodegradable film produced by the film blowing in the step S6 to printing equipment for printing;
s8, sealing, packaging and storing, namely winding the biodegradable film produced in the step S7 into a product, sending the wound biodegradable film product into a sealing bag for drying, sealing and storing, and finally registering and warehousing the sealed biodegradable film product.
In summary, the biodegradable film using lactic acid bacteria and polyesters as main materials and the manufacturing method thereof, when manufacturing the biodegradable film, firstly, weighing starch, lactic acid bacteria, polyesters, polybutylene carbonate, polyester fiber, acetyl tributyl citrate and inorganic filler according to the weight parts, then, preparing starch into unrefined glucose, then, adding glucose into a fermentation tank, adding lactic acid bacteria into the fermentation tank, fermenting the glucose into lactic acid, then, concentrating the lactic acid and processing the lactic acid into lactide, performing vacuum purification on lactide monomer, completing the ring opening action by a dissolving process without using a solvent to polymerize the monomer into polylactic acid, then, drying the polylactic acid in a vacuum environment at 82 ℃ for 4.5 hours, then, mixing and granulating the raw materials, and improving the high-temperature melting of semi-finished resin prepared by a single-screw extruder after the granulation is completed, then conveying the melted resin to a film blowing machine through a screw extruder for film blowing, simultaneously cooling and shaping the biodegradable film blown out of the film blowing machine through cooling equipment, blending polylactic acid prepared from starch and lactic acid bacteria and organic high molecular compounds matched with different components, ensuring the tensile strength of the biodegradable film and improving the elongation at break, simultaneously adding inorganic filler, wherein hydroxyl groups contained in the inorganic filler can form strong hydrogen bonds with polylactic acid molecules, the mechanical strength of a filling system is high, the mechanical property is also improved, the polylactic acid attached to the straightened polyester fiber in a stretching flow field directly forms a semi-crystalline structure, simultaneously the selected polyester fiber is also degradable fiber, the excellent degradable performance of the biodegradable film is kept, and the biodegradable film is mainly prepared from polyester and polylactic acid, the polyester and the polylactic acid can ensure that the biodegradable film can be completely decomposed by lactic acid bacteria after being used, the biodegradable film is completely biodegradable plastic and has excellent use performance, can be completely decomposed by microorganisms and algae existing in the nature after being discarded, and finally is inorganized into carbon circulation in the nature, and no harmful substance is remained, so that the environment pollution can not be caused, the environmental protection performance of the biodegradable film is improved, the tensile strength and the impact strength of the biodegradable film can be effectively improved, and the use reliability of the biodegradable film is improved.
It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The biodegradable film taking lactic acid bacteria and polyesters as main materials is characterized by comprising the following components in parts by weight: 45-55 parts of starch, 20-35 parts of lactic acid bacteria, 42-50 parts of polyesters, 13-21 parts of polybutylene carbonate, 30-35 parts of polyester fiber, 6-9 parts of acetyl tributyl citrate and 10-20 parts of inorganic filler.
2. The biodegradable film taking lactic acid bacteria and polyesters as main materials according to claim 1, wherein the polyesters comprise the following components in parts by weight: 70-85 parts of branched polyester, 11-13 parts of a chain extender, 8-12 parts of an antioxidant, 6-9 parts of a stabilizer and 10-15 parts of a nucleating agent.
3. The biodegradable film using lactic acid bacteria and polyesters as main materials according to claim 1, wherein the polyester fiber is any one of polytrimethylene terephthalate fiber and polybutylene terephthalate fiber; the diameter of the polyester fiber is 0.9-2.6 microns.
4. The biodegradable film based on lactic acid bacteria and polyesters according to claim 2, wherein said long-chain branched polyester is prepared by uniformly mixing a long-chain branched aliphatic polyester and a long-chain branched aliphatic-aromatic copolyester in a ratio of 3: 2.
5. The biodegradable film based on lactic acid bacteria and polyesters according to claim 2, wherein the chain extender is at least one of toluene diisocyanate, bischloroformate, hexamethylene diisocyanate and isophorone diisocyanate, the antioxidant is any two of bisphenol A phosphite, octadecyl propionate and dodecyl thiopropyl phosphite, the stabilizer is at least one of calcium stearate, zinc oxide, kaolin and montmorillonite, and the nucleating agent is at least one of aluminum carbonate, terephthalic acid and aluminum oxide.
6. The biodegradable film using lactic acid bacteria and polyesters as main materials according to claim 1, wherein said inorganic filler is any two of nano-hydroxyapatite, nano-halloysite and nano-white carbon black.
7. The method for manufacturing the biodegradable film mainly comprising lactic acid bacteria and polyesters according to claim 1, comprising the steps of:
s1, preparing raw materials, namely weighing starch, lactic acid bacteria, polyesters, polybutylene carbonate, polyester fibers, acetyl tributyl citrate and inorganic filler according to parts by weight;
s2, preparing polylactic acid, namely preparing unrefined glucose from starch, adding the glucose into a fermentation tank, adding lactic acid bacteria into the fermentation tank, fermenting the glucose into lactic acid, concentrating the lactic acid to prepare lactide, performing vacuum purification on lactide monomers, and completing ring opening by a solvent-free dissolving process to polymerize the monomers into the polylactic acid;
s3, drying, namely drying the polylactic acid processed and prepared in the step S2 for 4 to 5 hours at the temperature of between 80 and 85 ℃ in a vacuum environment;
s4, mixing, namely pouring polylactic acid, polyesters, polybutylene carbonate, polyester fibers, acetyl tributyl citrate and inorganic filler into mixing equipment, and fully mixing for 1-1.5 hours;
s5, granulating, namely adding the raw materials mixed in the step S4 into a double-screw extruder to be extruded to form resin particles, wherein the melting temperature of the double-screw extruder is 175-225 ℃;
s6, blowing the film, namely conveying the semi-finished product resin granulated in the step S5 to a single-screw extruder for high-temperature melting, wherein the melting temperature is 195-230 ℃, conveying the melted resin to a film blowing machine through the screw extruder for film blowing, and cooling and shaping the biodegradable film blown out of the film blowing machine through cooling equipment;
s7, printing, namely conveying the biodegradable film produced by the film blowing in the step S6 to printing equipment for printing;
and S8, sealing, packaging and storing, namely winding the biodegradable film produced in the step S7 into a product, conveying the wound biodegradable film product into a sealing bag for drying, sealing and storing, and finally registering and warehousing the sealed biodegradable film product.
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