CN113512275A - High-melt-strength compostable degradable material and preparation method thereof - Google Patents
High-melt-strength compostable degradable material and preparation method thereof Download PDFInfo
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- CN113512275A CN113512275A CN202010281153.3A CN202010281153A CN113512275A CN 113512275 A CN113512275 A CN 113512275A CN 202010281153 A CN202010281153 A CN 202010281153A CN 113512275 A CN113512275 A CN 113512275A
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- 239000000463 material Substances 0.000 title claims abstract description 140
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- 238000003756 stirring Methods 0.000 claims abstract description 34
- 239000006085 branching agent Substances 0.000 claims abstract description 32
- 239000011256 inorganic filler Substances 0.000 claims abstract description 31
- 229910003475 inorganic filler Inorganic materials 0.000 claims abstract description 31
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 29
- 239000007822 coupling agent Substances 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 18
- 238000005507 spraying Methods 0.000 claims abstract description 9
- 241000196324 Embryophyta Species 0.000 claims description 79
- -1 poly (trihydroxy butyl Chemical group 0.000 claims description 33
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- 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
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- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 8
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 8
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 8
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 claims description 8
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 8
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 claims description 8
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- ISIJQEHRDSCQIU-UHFFFAOYSA-N tert-butyl 2,7-diazaspiro[4.5]decane-7-carboxylate Chemical compound C1N(C(=O)OC(C)(C)C)CCCC11CNCC1 ISIJQEHRDSCQIU-UHFFFAOYSA-N 0.000 claims description 8
- VPGQKKRYMLWIOI-UHFFFAOYSA-N P(=O)(O)(O)O.C(C)(C)(C)C1=C(C=CC(=C1)C(C)(C)C)[Na] Chemical compound P(=O)(O)(O)O.C(C)(C)(C)C1=C(C=CC(=C1)C(C)(C)C)[Na] VPGQKKRYMLWIOI-UHFFFAOYSA-N 0.000 claims description 6
- 229920000642 polymer Polymers 0.000 claims description 6
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
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- 235000021355 Stearic acid Nutrition 0.000 claims description 4
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- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 4
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 4
- 229920000728 polyester Polymers 0.000 claims description 4
- 239000008117 stearic acid Substances 0.000 claims description 4
- 239000002025 wood fiber Substances 0.000 claims description 4
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 3
- 239000002202 Polyethylene glycol Substances 0.000 claims description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 3
- 150000001875 compounds Chemical group 0.000 claims description 3
- 230000000593 degrading effect Effects 0.000 claims description 3
- 229920001223 polyethylene glycol Polymers 0.000 claims description 3
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- JYEUMXHLPRZUAT-UHFFFAOYSA-N 1,2,3-triazine Chemical compound C1=CN=NN=C1 JYEUMXHLPRZUAT-UHFFFAOYSA-N 0.000 claims description 2
- 239000005995 Aluminium silicate Substances 0.000 claims description 2
- 244000025254 Cannabis sativa Species 0.000 claims description 2
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 claims description 2
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 claims description 2
- 229920000742 Cotton Polymers 0.000 claims description 2
- UAUDZVJPLUQNMU-UHFFFAOYSA-N Erucasaeureamid Natural products CCCCCCCCC=CCCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-UHFFFAOYSA-N 0.000 claims description 2
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 2
- TXQVDVNAKHFQPP-UHFFFAOYSA-N [3-hydroxy-2,2-bis(hydroxymethyl)propyl] octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(CO)(CO)CO TXQVDVNAKHFQPP-UHFFFAOYSA-N 0.000 claims description 2
- YZIKVRNJYWAAAB-UHFFFAOYSA-L [OH-].C(C)(C)(C)C1=CC=C(C(=C1)C(C)(C)C)[Al+2].[OH-] Chemical compound [OH-].C(C)(C)(C)C1=CC=C(C(=C1)C(C)(C)C)[Al+2].[OH-] YZIKVRNJYWAAAB-UHFFFAOYSA-L 0.000 claims description 2
- 235000012211 aluminium silicate Nutrition 0.000 claims description 2
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 claims description 2
- 239000012965 benzophenone Substances 0.000 claims description 2
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims description 2
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- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 claims description 2
- 239000011487 hemp Substances 0.000 claims description 2
- 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 2
- 239000010445 mica Substances 0.000 claims description 2
- 229910052618 mica group Inorganic materials 0.000 claims description 2
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 claims description 2
- FATBGEAMYMYZAF-UHFFFAOYSA-N oleicacidamide-heptaglycolether Natural products CCCCCCCCC=CCCCCCCCC(N)=O FATBGEAMYMYZAF-UHFFFAOYSA-N 0.000 claims description 2
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- JQYSLXZRCMVWSR-UHFFFAOYSA-N 1,6-dioxacyclododecane-7,12-dione;terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1.O=C1CCCCC(=O)OCCCCO1 JQYSLXZRCMVWSR-UHFFFAOYSA-N 0.000 claims 1
- ZMKVBUOZONDYBW-UHFFFAOYSA-N 1,6-dioxecane-2,5-dione Chemical compound O=C1CCC(=O)OCCCCO1 ZMKVBUOZONDYBW-UHFFFAOYSA-N 0.000 claims 1
- 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 1
- 244000082204 Phyllostachys viridis Species 0.000 claims 1
- JSZNQQVYIRVXQV-UHFFFAOYSA-N butanedioic acid;butane-1,4-diol;hexanedioic acid Chemical compound OCCCCO.OC(=O)CCC(O)=O.OC(=O)CCCCC(O)=O JSZNQQVYIRVXQV-UHFFFAOYSA-N 0.000 claims 1
- 230000015556 catabolic process Effects 0.000 claims 1
- 238000006731 degradation reaction Methods 0.000 claims 1
- 229920005586 poly(adipic acid) Polymers 0.000 claims 1
- 229920001707 polybutylene terephthalate Polymers 0.000 claims 1
- 229940070710 valerate Drugs 0.000 claims 1
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 claims 1
- 238000005187 foaming Methods 0.000 abstract description 40
- 238000010521 absorption reaction Methods 0.000 abstract description 11
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- 238000000465 moulding Methods 0.000 abstract description 4
- 238000004806 packaging method and process Methods 0.000 abstract description 4
- 229920006167 biodegradable resin Polymers 0.000 abstract 1
- 239000000155 melt Substances 0.000 description 18
- 230000000052 comparative effect Effects 0.000 description 14
- 239000004629 polybutylene adipate terephthalate Substances 0.000 description 9
- 241001330002 Bambuseae Species 0.000 description 7
- 230000005484 gravity Effects 0.000 description 7
- 239000004743 Polypropylene Substances 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 6
- 239000002023 wood Substances 0.000 description 6
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 5
- 239000004793 Polystyrene Substances 0.000 description 5
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- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 5
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- 239000004814 polyurethane Substances 0.000 description 5
- 239000004800 polyvinyl chloride Substances 0.000 description 5
- 229920000915 polyvinyl chloride Polymers 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
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- 229920001587 Wood-plastic composite Polymers 0.000 description 2
- 240000008042 Zea mays Species 0.000 description 2
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- JYEVGXLRAPYOSO-UHFFFAOYSA-L disodium;(2,4-ditert-butylphenyl) phosphate Chemical compound [Na+].[Na+].CC(C)(C)C1=CC=C(OP([O-])([O-])=O)C(C(C)(C)C)=C1 JYEVGXLRAPYOSO-UHFFFAOYSA-L 0.000 description 2
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- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 2
- 239000011155 wood-plastic composite Substances 0.000 description 2
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- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 1
- 244000304337 Cuminum cyminum Species 0.000 description 1
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- 101100492811 Drosophila melanogaster tefu gene Proteins 0.000 description 1
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- VOZRXNHHFUQHIL-UHFFFAOYSA-N glycidyl methacrylate Chemical compound CC(=C)C(=O)OCC1CO1 VOZRXNHHFUQHIL-UHFFFAOYSA-N 0.000 description 1
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- 239000003562 lightweight material Substances 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 238000010899 nucleation Methods 0.000 description 1
- 229920000520 poly(3-hydroxybutyrate-co-3-hydroxyvalerate) Polymers 0.000 description 1
- 229920009537 polybutylene succinate adipate Polymers 0.000 description 1
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- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
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- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 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
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L97/00—Compositions of lignin-containing materials
- C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse
-
- 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
- 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
-
- 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)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Materials Engineering (AREA)
- Biological Depolymerization Polymers (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to the technical field of degradable materials and preparation methods thereof, in particular to a compostable degradable material with high melt strength, which comprises the following components: 35-90 parts of degradable resin, 0.1-4 parts of branching agent, 10-50 parts of pretreated plant filler, 0-10 parts of inorganic filler and 0.1-1 part of auxiliary agent. The preparation method comprises the following steps: baking the plant filler, adding a coupling agent by spraying, and continuously stirring to obtain a pretreated filler; adding the degradable resin, the branching agent, the pretreated plant filler, the inorganic filler and the auxiliary agent into a stirrer, stirring and extruding to obtain the biodegradable resin. The invention solves the problem that materials such as tableware, packaging, noise reduction and shock absorption, heat insulation and preservation, shock absorption and buffering and the like in the prior art are not biodegradable, the compostable and degradable materials have low cost and high melt strength, and can be processed by processes such as physical or chemical foaming and the like to prepare the foamed product with uniform molding bubble size, high bubble rate, high strength and good toughness.
Description
Technical Field
The invention relates to the technical field of degradable materials and preparation methods thereof, in particular to a compostable degradable material with high melt strength and a preparation method thereof.
Background
With the development of human society, people's environmental awareness is gradually increased, and more strict limiting measures are adopted in many countries and regions in the world for the application of certain industries and products which destroy and pollute the ecological environment. At present, various tableware, packing materials, buffering, shock absorption, sound insulation and heat preservation are mostly made of polyolefin foaming materials, such as foaming polystyrene, polyvinyl chloride, polypropylene, polyethylene, polyurethane, ethylene-vinyl acetate and the like. The waste of these materials has caused considerable environmental pollution due to their non-degradability. For many years, people have searched cumin to replace biodegradable lightweight materials, but no ideal substitute exists so far.
Chinese patent CN200810220305.8 proposes a completely degraded plant powder modified thermoplastic composite material and a preparation method thereof. The composition comprises the following components in parts by weight: degrading the thermoplastic resin 100; 1-400 parts of plant powder; 0.1-40% of a dispersant; 0.5 to 60 parts of impact modifier; 0-40% of an inorganic filler; 0.1-10% of stabilizer. The degradable thermoplastic resin has physical and chemical properties similar to those of general plastics such as polyethylene and polypropylene, has good processability, and can be blended with plant powder to prepare thermoplastic wood-plastic composite materials. The obtained thermoplastic wood-plastic composite material can be completely degraded under the action of microorganisms such as bacteria, actinomycetes and the like widely existing in natural environment, and finally decomposed into carbon dioxide and water. Compared with wood, the composite material has the advantages of durability, good dimensional stability, easy molding, small water absorption and corrosion resistance; compared with plastics, the composite material has the characteristics of low cost and high rigidity. The method can be used for producing shells of electrical appliances such as televisions, audios, copiers, printers and the like, and can also be used for other injection parts. However, the technical scheme is to improve the toughness and various mechanical properties of the material by using an impact modifier (polyester), mainly pursues high performance of the material, and does not improve the foaming performance and the melt strength of the material.
In the prior art, various tableware, packing materials, buffering, shock absorption, sound insulation and heat preservation are mostly made of polyolefin foaming materials, such as foaming polystyrene, polyvinyl chloride, polypropylene, polyethylene, polyurethane, ethylene-vinyl acetate and the like. The material is not biodegradable and has great damage to environment.
Disclosure of Invention
In view of the above disadvantages of the prior art, the present invention provides a compostable degradable material with high melt strength, which is used to solve the problem that the materials of tableware, packaging, noise reduction and vibration reduction, heat insulation and shock absorption, and shock absorption and buffering, etc. in the prior art are not biodegradable, and also provides a method for preparing the compostable degradable material with high melt strength. The compostable degradable material prepared by the invention has low cost and high melt strength, and can be processed by physical or chemical foaming and other processes to prepare a foamed product with uniform molding cell size, high cell rate, high strength and good toughness.
In order to attain the above and other related objects,
in a first aspect of the invention, a compostable degradable material with high melt strength is provided, which comprises the following raw materials in parts by weight: 35-90 parts of degradable resin, 0.1-4 parts of branching agent, 10-50 parts of pretreated plant filler, 0-10 parts of inorganic filler and 0.1-1 part of auxiliary agent.
The degradable resin is used for ensuring the compostable degradable material and the final degradability of the compostable degradable material; the branching agent can also enable polymer chains to be lightly crosslinked under the condition of a small addition amount, so that the melt strength of the compostable degradable material is increased, and the foaming feasibility of the final compostable degradable material is guaranteed; the branching agent can promote the light crosslinking of a polymer chain and improve the melt strength, and simultaneously can improve the impact toughness of the material to a certain degree, and the degradable resin is not used independently, has a base material with better flexibility in the degradable resin, and can improve the impact strength moderately by using the base material with better flexibility and the base material with better rigidity in a compounding way. The compostable degradable material balances the comprehensive properties of the compostable degradable environment-friendly material, such as strength, toughness, foaming controllability and the like, and compared with the degradable resin of the prior raw material, the impact strength is improved by 120-1000%, and the melt strength is improved by 150-800%.
When the content of the branching agent is within the above range, the-OH groups and-COOH groups located at the ends of the degradable resin can exhibit excellent reactivity with the branching agent, and a biodegradable composite having improved melt strength can be obtained. If the content of the branching agent is less than the above range, the melt strength of the material cannot be improved, and cells are not easily formed or broken during foaming because the melt is easily collapsed; when the content of the branching agent is higher than the above range, the branching reaction is excessive, a large amount of gel is formed, and the material is difficult to produce, and cannot be melt-processed in the subsequent foaming process, and cannot be foamed effectively.
The cost of the plant filler and the inorganic filler is low, and the degradable resin is expensive, so that the addition amount of the degradable resin can be reduced after the plant filler and the inorganic filler are added, the degradability of the compostable degradable material can be ensured, and the manufacturing cost of the compostable degradable material can be reduced. The compostable degradable material reduces the specific gravity and the cost of the degradable resin, and compared with the existing resin degradable material, the compostable degradable material reduces the specific gravity by 5-10% and reduces the price by 20-40%; the specific gravity of the plant filler is small, the specific gravity of the added material can be properly reduced according to the addition amount, and the specific gravity of the product is lower after the foaming product is formed; the price of the degradable resin is 30 yuan/KG, the price of the pretreated plant filler is 6 yuan/KG, and the price of the inorganic filler is 3-6 yuan/KG; the cost price of the filler which is not added is 30 yuan/KG, the cost after the filler is added is about 20 yuan/KG, the price is reduced by 33.3 percent, and the cost can be controlled by adjusting the content of the filler.
The plant filler is treated by the coupling agent, so that a continuous plant filler network can be effectively formed in the compostable degradable material, the bonding force between the plant filler and a base material (degradable resin) is good, the mechanical property and the melt strength of the compostable degradable material can be improved, and a foundation is provided for subsequent foaming processing. The plant filler can be obtained from wood product leftover materials, bamboo product leftover materials, rice hulls, wheat straws, rice straws, corn straws or sorghum straws, and can solve the problem of returning the wheat straws, the rice straws, the corn straws or the sorghum straws to the field at the present stage; wooden product leftover materials and bamboo product leftover materials are process waste materials, and waste materials can be changed into valuable materials, so that the utilization rate of the materials is improved.
The inorganic filler, while added as a degradable substance to a degradable resin to achieve cost reduction, can also be regarded as a nucleating agent to improve the mechanical properties and melt strength of the compostable degradable material.
The compostable degradable material has excellent mechanical property, can be composted and degraded, is environment-friendly, improves the melt strength of the degradable resin through the branching agent, has excellent physical and chemical foaming feasibility, and can be subjected to continuous extrusion foaming, rapid injection foaming, blow molding foaming, molding foaming or other forms of foaming processing. The raw materials are compostable degradable materials or natural mineral powder, meet the environmental protection requirements promoted by the state, and the foaming material of the compostable degradable materials can be applied to the fields of tableware, packaging, noise reduction and shock absorption, heat insulation and preservation, shock absorption and buffering and the like, can replace the existing foaming materials such as polystyrene, polypropylene, polyethylene, polyurethane, polyvinyl chloride, ethylene-vinyl acetate and the like, and eliminates 'white garbage'. The leftover materials after the foaming product of the compostable degradable material can be recycled, so that the material waste is avoided. The final foamed product can be subjected to composting treatment, can be degraded into carbon dioxide, water, natural mineral powder and 0-2% of residues, and is environment-friendly.
In one embodiment of the present invention, the compostable and degradable materials comprise the following raw materials in parts by weight: 50-60 parts of degradable resin, 0.5-1.0 part of branching agent, 20-40 parts of plant filler, 5-8 parts of inorganic filler and 0.5-1.0 part of auxiliary agent.
In an embodiment of the present invention, the degradable resin is at least one of compostable degradable resins such as PLA (polylactic acid), PBAT (polybutylene adipate-terephthalate), PBS (polybutylene succinate-butylene succinate), PBSA (polybutylene succinate-adipate-butylene succinate), PTAT, PEG (polyethylene glycol), PEO (polyethylene oxide), PHB (poly (trihydroxybutyl ester), PHBV (poly (trihydroxybutyl ester-trihydroxypentyl ester copolymer), PVOH (polyvinyl alcohol), etc.;
the branching agent is at least one of polyfunctional polyester compound, epoxy functional group-containing polymer and organic peroxide.
The multifunctional polyester compound can be one or two of TDI (toluene diisocyanate) or MDI (polyurethane material synthesized by isocyanate, polyol and compounding auxiliary agents thereof). The epoxy-functional polymer may be one or a combination of epoxy resin or a graft of glycidyl methacrylate. The organic peroxide can be one or a combination of dicumyl peroxide and benzoyl peroxide.
In an embodiment of the present invention, the degradable resin is at least one of polylactic acid and polybutylene adipate/terephthalate;
the branching agent is at least one of polymer containing epoxy functional group and organic peroxide.
Preferably a PLA material, and secondly a PLA/PBAT combination material.
In an embodiment of the present invention, the inorganic filler is at least one of calcium carbonate, talc powder, kaolin, and mica powder;
the auxiliary agent is at least one of an antioxidant, a UV stabilizer, a lubricant and a nucleating agent.
In an embodiment of the present invention, the inorganic filler is talc powder, and the mesh number of the talc powder is 3000 to 10000 meshes;
the antioxidant is at least one of hindered phenol antioxidant 1010 and phosphorous acid antioxidant 168;
the UV stabilizer is at least one of benzophenone UV stabilizer, benzotriazole UV stabilizer and triazine UV stabilizer;
the lubricant is at least one of pentaerythritol stearate, silicone master batch, polyethylene wax, stearic acid, oleamide and erucamide;
the nucleating agent is at least one of 4, 6-di-tert-butylphenyl sodium phosphate, 2-methylenebis (4, 6-di-tert-butylphenyl) sodium phosphate, and 2, 2-methylenebis (4, 6-di-tert-butylphenyl) aluminum hydroxide salt.
In a second aspect of the invention, there is provided a method of preparing a high melt strength compostable degradable material as described above, comprising the steps of:
crushing and sieving the plant filler, baking at the temperature of 100-120 ℃ until the water content is less than or equal to 0.2%, adding the baked plant filler into a stirrer, stirring for at least 20min, adding a coupling agent by spraying, and continuously stirring for at least 40min to obtain a pretreated filler for later use;
and step two, adding the degradable resin, the branching agent, the pretreated plant filler, the inorganic filler and the auxiliary agent into a stirrer according to the weight parts, stirring for at least 15min, adding the mixture into a double-screw extruder, and extruding at the temperature of 165-180 ℃ and the rotating speed of 250-350 r/min to obtain the compostable degradable material with high melt strength.
The plant filler is treated by the coupling agent, so that a continuous plant filler network can be effectively formed in the compostable degradable material, the bonding force between the plant filler and a base material (degradable resin) is good, the mechanical property and the melt strength of the compostable degradable material can be improved, and a foundation is provided for subsequent foaming processing. The plant filler is introduced with the coupling agent, so the inorganic filler is mixed with the coupling agent, and the inorganic filler treated by the coupling agent has good bonding force with a base material (degradable resin), and can provide good thermal deformation and nucleation capability for the material.
In an embodiment of the present invention, in the first step, the mass ratio of the coupling agent to the plant filler is 1: (50-100); the plant filler is at least one of wood fiber, bamboo fiber, cotton fiber, hemp fiber and plant straw.
In an embodiment of the present invention, the baking temperature in the first step is 70 ℃; the stirring speed in the first step is 100-150 r/min.
In an embodiment of the present invention, the extrusion temperature in the second step is 170-175 ℃ and the rotation speed is 300 r/min.
As mentioned above, the compostable and degradable material with high melt strength and the preparation method thereof have the following beneficial effects:
1. the compostable degradable material balances the comprehensive properties of the compostable degradable environment-friendly material, such as strength, toughness, foaming controllability and the like, and compared with the degradable resin of the prior raw material, the impact strength is improved by 120-1000%, and the melt strength is improved by 150-800%.
2. The compostable degradable material reduces the specific gravity and the cost of the degradable resin, and compared with the existing resin degradable material, the compostable degradable material reduces the specific gravity by 5-10% and reduces the price by 20-40%.
3. The plant filler is treated by the coupling agent, so that a continuous plant filler network can be effectively formed in the compostable degradable material, the bonding force between the plant filler and a base material (degradable resin) is good, the mechanical property and the melt strength of the compostable degradable material can be improved, and a foundation is provided for subsequent foaming processing.
4. The raw materials are compostable degradable materials or natural mineral powder, meet the environmental protection requirements promoted by the state, and the foaming material of the compostable degradable materials can be applied to the fields of tableware, packaging, noise reduction and shock absorption, heat insulation and preservation, shock absorption and buffering and the like, can replace the existing foaming materials such as polystyrene, polypropylene, polyethylene, polyurethane, polyvinyl chloride, ethylene-vinyl acetate and the like, and eliminates 'white garbage'.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Example 1
A compostable degradable material with high melt strength comprises the following raw materials in parts by weight: 74 parts of degradable resin (polylactic acid and polybutylene adipate-terephthalate are mixed according to the mass ratio of 1: 2), 0.5 part of branching agent (dicumyl peroxide), 20 parts of pretreated plant filler, 5 parts of inorganic filler (talcum powder, the mesh number is 3000-10000 meshes) and 0.5 part of auxiliary agent;
the auxiliary agent comprises the following components in parts by weight: 1 part of antioxidant (0.5 part of hindered phenol antioxidant 1010 and 0.5 part of phosphorous acid antioxidant 168); 1 part of a UV stabilizer (ultraviolet absorber UV-531), 3 parts of a lubricant (polyethylene wax), 1 part of a nucleating agent (sodium 4, 6-di-tert-butylphenyl phosphate).
A method for preparing the high melt strength compostable degradable material comprises the following steps:
step one, crushing plant filler (wood product leftover materials and bamboo product leftover materials are mixed according to the mass ratio of 1: 2), sieving the crushed plant filler (100-300 meshes), baking the crushed plant filler at the temperature of 100 ℃ until the moisture content is less than or equal to 0.2%, adding the baked plant filler into a stirrer, stirring the mixture for 20min, adding a coupling agent by spraying, wherein the mass ratio of the coupling agent to the plant filler is 1: 65, continuously stirring for 40min to obtain the pretreated filler for later use, wherein the stirring speed is 150 r/min;
and step two, adding the degradable resin, the branching agent, the pretreated plant filler, the inorganic filler and the auxiliary agent into a stirrer according to the weight parts, stirring for 15min, adding the mixture into a double-screw extruder, and extruding at the temperature of 165 ℃ and the rotating speed of 250r/min to obtain the compostable degradable material with high melt strength.
Example 2
A compostable degradable material with high melt strength comprises the following raw materials in parts by weight: 49 parts of degradable resin (polylactic acid and polybutylene adipate-terephthalate are mixed according to the mass ratio of 1: 1), 0.5 part of branching agent (dicumyl peroxide), 40 parts of pretreated plant filler, 10 parts of inorganic filler (talcum powder, the mesh number is 3000-10000 meshes) and 0.5 part of auxiliary agent;
the auxiliary agent comprises the following components in parts by weight: 2 parts of antioxidant (1 part of hindered phenol antioxidant 1010 and 1 part of phosphorous acid antioxidant 168); 2 parts of a UV stabilizer (ultraviolet absorber UV-400), 4 parts of a lubricant (stearic acid), 1 part of a nucleating agent (2, 2-methylenebis (4, 6-di-tert-butylphenyl) aluminum phosphate hydroxide).
A method for preparing the high melt strength compostable degradable material comprises the following steps:
step one, crushing plant filler (wood fiber and plant straw are mixed according to the mass ratio of 2: 1), sieving the crushed plant filler (100-300 meshes), baking the plant filler at the temperature of 120 ℃ until the moisture content is less than or equal to 0.2%, adding the baked plant filler into a stirrer, stirring the mixture for 20min, adding a coupling agent by spraying, wherein the mass ratio of the coupling agent to the plant filler is 1: 80, continuously stirring for 40min to obtain a pretreated filler for later use, wherein the stirring speed is 120 r/min;
and step two, adding the degradable resin, the branching agent, the pretreated plant filler, the inorganic filler and the auxiliary agent into a stirrer according to the weight parts, stirring for 15min, adding the mixture into a double-screw extruder, and extruding at the temperature of 170 ℃ and the rotating speed of 300r/min to obtain the compostable degradable material with high melt strength.
Example 3
A compostable degradable material with high melt strength comprises the following raw materials in parts by weight: 59 parts of degradable resin (polylactic acid and polybutylene adipate-terephthalate are mixed according to the mass ratio of 1: 2), 0.5 part of branching agent (dicumyl peroxide), 20 parts of pretreated plant filler, 20 parts of inorganic filler (talcum powder, the mesh number is 3000-10000 meshes) and 0.5 part of auxiliary agent;
the auxiliary agent comprises the following components in parts by weight: 1 part of antioxidant (0.5 part of hindered phenol antioxidant 1010 and 0.5 part of phosphorous acid antioxidant 168); 1 part of UV stabilizer (ultraviolet absorber UV-531), 3 parts of lubricant (polyethylene wax), 1 part of nucleating agent (4, 6-di-tert-butylphenyl sodium phosphate)
A method for preparing the high melt strength compostable degradable material comprises the following steps:
step one, crushing plant filler (wood product leftover materials and bamboo product leftover materials are mixed according to the mass ratio of 1: 2), sieving the crushed plant filler (100-300 meshes), baking the crushed plant filler at the temperature of 110 ℃ until the moisture content is less than or equal to 0.2%, adding the baked plant filler into a stirrer, stirring the mixture for 20min, adding a coupling agent by spraying, wherein the mass ratio of the coupling agent to the plant filler is 1: 65, continuously stirring for 40min to obtain the pretreated filler for later use, wherein the stirring speed is 150 r/min;
and step two, adding the degradable resin, the branching agent, the pretreated plant filler, the inorganic filler and the auxiliary agent into a stirrer according to the weight parts, stirring for 15min, adding the mixture into a double-screw extruder, and extruding at the temperature of 165 ℃ and the rotating speed of 250r/min to obtain the compostable degradable material with high melt strength.
Example 4
A compostable degradable material with high melt strength comprises the following raw materials in parts by weight: 39 parts of degradable resin (polylactic acid and polybutylene adipate-terephthalate are mixed according to the mass ratio of 1: 2), 0.5 part of branching agent (dicumyl peroxide), 10 parts of pretreated plant filler, 30 parts of inorganic filler (talcum powder, the mesh number is 3000-10000 meshes) and 0.5 part of auxiliary agent;
the auxiliary agent comprises the following components in parts by weight: 1 part of antioxidant (0.5 part of hindered phenol antioxidant 1010 and 0.5 part of phosphorous acid antioxidant 168); 1 part of UV stabilizer (ultraviolet absorber UV-531), 3 parts of lubricant (polyethylene wax), 1 part of nucleating agent (4, 6-di-tert-butylphenyl sodium phosphate)
A method for preparing the high melt strength compostable degradable material comprises the following steps:
step one, crushing plant filler (wood product leftover materials and bamboo product leftover materials are mixed according to the mass ratio of 1: 2), sieving the crushed plant filler (100-300 meshes), baking the crushed plant filler at the temperature of 110 ℃ until the moisture content is less than or equal to 0.2%, adding the baked plant filler into a stirrer, stirring the mixture for 20min, adding a coupling agent by spraying, wherein the mass ratio of the coupling agent to the plant filler is 1: 65, continuously stirring for 40min to obtain the pretreated filler for later use, wherein the stirring speed is 150 r/min;
and step two, adding the degradable resin, the branching agent, the pretreated plant filler, the inorganic filler and the auxiliary agent into a stirrer according to the weight parts, stirring for 15min, adding the mixture into a double-screw extruder, and extruding at the temperature of 165 ℃ and the rotating speed of 250r/min to obtain the compostable degradable material with high melt strength.
Comparative example 1
A compostable degradable material with high melt strength comprises the following raw materials in parts by weight: 74.5 parts of degradable resin (polylactic acid and polybutylene adipate-terephthalate are mixed according to the mass ratio of 1: 2), 20 parts of pretreated plant filler, 5 parts of inorganic filler (talcum powder, the mesh number is 3000-10000 meshes) and 0.5 part of auxiliary agent;
the auxiliary agent comprises the following components in parts by weight: 1 part of antioxidant (0.5 part of hindered phenol antioxidant 1010 and 0.5 part of phosphorous acid antioxidant 168); 1 part of a UV stabilizer (ultraviolet absorber UV-531), 3 parts of a lubricant (polyethylene wax), 1 part of a nucleating agent (sodium 4, 6-di-tert-butylphenyl phosphate).
A method for preparing the high melt strength compostable degradable material comprises the following steps:
step one, crushing plant filler (wood product leftover materials and bamboo product leftover materials are mixed according to the mass ratio of 1: 2), sieving the crushed plant filler (100-300 meshes), baking the crushed plant filler at the temperature of 100 ℃ until the moisture content is less than or equal to 0.2%, adding the baked plant filler into a stirrer, stirring the mixture for 20min, adding a coupling agent by spraying, wherein the mass ratio of the coupling agent to the plant filler is 1: 65, continuously stirring for 40min to obtain the pretreated filler for later use, wherein the stirring speed is 150 r/min;
and step two, adding the degradable resin, the pretreated plant filler, the inorganic filler and the auxiliary agent into a stirrer according to the weight parts, stirring for 15min, adding the mixture into a double-screw extruder, and extruding at the temperature of 165 ℃ and the rotating speed of 250r/min to obtain the compostable degradable material with high melt strength.
Comparative example 1 differs from example 1 in that no branching agent is added, the weight of branching agent corresponding to the addition to the degradable resin.
Comparative example 2
A compostable degradable material with high melt strength comprises the following raw materials in parts by weight: 49.5 parts of degradable resin (polylactic acid and polybutylene adipate-terephthalate are mixed according to the mass ratio of 1: 1), 40 parts of pretreated plant filler, 10 parts of inorganic filler (talcum powder, the mesh number is 3000-10000 meshes) and 0.5 part of auxiliary agent;
the auxiliary agent comprises the following components in parts by weight: 2 parts of antioxidant (1 part of hindered phenol antioxidant 1010 and 1 part of phosphorous acid antioxidant 168); 2 parts of a UV stabilizer (ultraviolet absorber UV-400), 4 parts of a lubricant (stearic acid), 1 part of a nucleating agent (2, 2-methylenebis (4, 6-di-tert-butylphenyl) aluminum phosphate hydroxide).
A method for preparing the high melt strength compostable degradable material comprises the following steps:
step one, crushing plant filler (wood fiber and plant straw are mixed according to the mass ratio of 2: 1), sieving the crushed plant filler (100-300 meshes), baking the plant filler at the temperature of 120 ℃ until the moisture content is less than or equal to 0.2%, adding the baked plant filler into a stirrer, stirring the mixture for 20min, adding a coupling agent by spraying, wherein the mass ratio of the coupling agent to the plant filler is 1: 80, continuously stirring for 40min to obtain a pretreated filler for later use, wherein the stirring speed is 120 r/min;
and step two, adding the degradable resin, the pretreated plant filler, the inorganic filler and the auxiliary agent into a stirrer according to the weight parts, stirring for 15min, adding the mixture into a double-screw extruder, and extruding at the temperature of 170 ℃ and the rotating speed of 300r/min to obtain the compostable degradable material with high melt strength.
Comparative example 2 differs from example 2 in that no branching agent was added, the weight of branching agent corresponding to the addition to the degradable resin.
The high melt strength compostable degradable materials of example 1, example 2, comparative example 1 and comparative example 2 were physically foamed by the following procedure: the compostable degradable material is put into an extrusion foaming machine, and supercritical CO is injected into an injection port2Mixing the high melt strength compostable and degradable materials with supercritical CO2Mixing uniformly in the extruder (supercritical state CO)2Has good contact surface with the melt), a continuous plate with fixed width and thickness can be obtained through a die with preset size, and the continuous plate can be adjusted through the process (injecting supercritical CO)2Flow, screw rotating speed of an extrusion foaming machine, and the like) to obtain continuous plates with different foaming ratios, wherein the plates can be freely cut and post-processed into products required by the market.
In particular cases, the identity of the processing technique is chosen to distinguish between material differences, and not only can one foaming process be employed with the high melt strength compostable degradable material of the present invention.
The high melt strength compostable degradable materials of example 1, example 2, comparative example 1 and comparative example 2 and the corresponding foamed articles were tested as follows, with the results shown in table 1:
fused finger (g/10 min): the melt index of the material was tested at 190 ℃ under a load of 2.16kg, ASTM D1238.
Tensile strength (MPa): ASTM D638.
Fracture productivity (%): ASTM D638.
Impact Strength (KJ/m)2)：ASTM D256。
Melt strength (g): the melt strength of the high melt strength compostable degradable materials of example 1, example 2, comparative example 1 and comparative example 2 were measured by a melt strength meter (Rheotens, high tefu).
Expansion ratio (double): the pre-foaming bulk density and the post-foaming bulk density of the extrusion-foamed compost-degradable materials of example 1, example 2, comparative example 1, and comparative example 2 described above were calculated, respectively, and then the foaming ratio of the high-melt-strength compostable degradable materials described above (foaming ratio ═ pre-foaming bulk density of compost-degradable material/post-foaming bulk density of compost-degradable material) was calculated according to the following mathematical formula.
Table 1
It can be seen from the data in table 1 that the addition amount of the pretreated plant filler is increased, the mechanical properties are reduced, but within an acceptable range, the addition of the branching agent obviously improves the melt strength of the material, so that the foaming ratio of the subsequent foaming processing is higher, and a foamed product capable of replacing non-degradable materials such as PS, PP, PE, TPU, PVC, EVA and the like is obtained, and the leftover materials after the foamed product is processed can be recycled, so that the material waste is not caused. According to the comparison between the comparative example 1 and the comparison between the comparative example 2 and the example 2, the impact strength is improved by 120 to 1000 percent, and the melt strength is improved by 150 to 800 percent
In conclusion, the compostable degradable material balances the comprehensive properties of the compostable degradable environment-friendly material, such as strength, toughness, foaming controllability and the like, and compared with the degradable resin of the existing raw material, the impact strength is improved by 120-1000%, and the melt strength is improved by 150-800%. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A compostable degradable material with high melt strength is characterized by comprising the following raw materials in parts by weight: 35-90 parts of degradable resin, 0.1-4 parts of branching agent, 10-50 parts of pretreated plant filler, 0-10 parts of inorganic filler and 0.1-1 part of auxiliary agent.
2. A high melt strength compostable degradable material as in claim 1 wherein: the compostable degradable material comprises the following raw materials in parts by weight: 50-60 parts of degradable resin, 0.5-1.0 part of branching agent, 20-40 parts of plant filler, 5-8 parts of inorganic filler and 0.5-1.0 part of auxiliary agent.
3. A high melt strength compostable degradable material as in claim 1 or 2 wherein: the degradable resin is at least one of polylactic acid, poly (butylene adipate-terephthalate), poly (butylene succinate), poly (succinate-adipate-butylene glycol), polyethylene glycol, polyethylene oxide, poly (trihydroxy butyl ester), poly (trihydroxy butyl ester-trihydroxy valerate) copolymer and polyvinyl alcohol;
the branching agent is at least one of polyfunctional polyester compound, epoxy functional group-containing polymer and organic peroxide.
4. A high melt strength compostable degradable material as in claim 3 wherein: the degradable resin is at least one of polylactic acid and poly adipic acid/butylene terephthalate;
the branching agent is at least one of polymer containing epoxy functional group and organic peroxide.
5. A high melt strength compostable degradable material as in claim 1 or 2 wherein: the inorganic filler is at least one of calcium carbonate, talcum powder, kaolin and mica powder;
the auxiliary agent is at least one of an antioxidant, a UV stabilizer, a lubricant and a nucleating agent.
6. A high melt strength compostable degradable material as in claim 5 wherein: the inorganic filler is talcum powder, and the mesh number of the talcum powder is 3000-10000 meshes;
the antioxidant is at least one of hindered phenol antioxidant 1010 and phosphorous acid antioxidant 168;
the UV stabilizer is at least one of benzophenone UV stabilizer, benzotriazole UV stabilizer and triazine UV stabilizer;
the lubricant is at least one of pentaerythritol stearate, silicone master batch, polyethylene wax, stearic acid, oleamide and erucamide;
the nucleating agent is at least one of 4, 6-di-tert-butylphenyl sodium phosphate, 2-methylenebis (4, 6-di-tert-butylphenyl) sodium phosphate, and 2, 2-methylenebis (4, 6-di-tert-butylphenyl) aluminum hydroxide salt.
7. A method of preparing a high melt strength compostable degradation material according to any of claims 1 to 6 comprising the steps of:
crushing and sieving the plant filler, baking at the temperature of 100-120 ℃ until the water content is less than or equal to 0.2%, adding the baked plant filler into a stirrer, stirring for at least 20min, adding a coupling agent by spraying, and continuously stirring for at least 40min to obtain a pretreated filler for later use;
and step two, adding the degradable resin, the branching agent, the pretreated plant filler, the inorganic filler and the auxiliary agent into a stirrer according to the weight parts, stirring for at least 15min, adding the mixture into a double-screw extruder, and extruding at the temperature of 165-180 ℃ and the rotating speed of 250-350 r/min to obtain the compostable degradable material with high melt strength.
8. A method of making a high melt strength compostable degrading material according to claim 7 wherein: in the first step, the mass ratio of the coupling agent to the plant filler is 1: (50-100); the plant filler is at least one of wood fiber, bamboo fiber, cotton fiber, hemp fiber and plant straw.
9. A method of making a high melt strength compostable degradable material as in claim 7 or 8 wherein: the baking temperature in the first step is 70 ℃; the stirring speed in the first step is 100-150 r/min.
10. A method of making a high melt strength compostable degrading material according to claim 7 wherein: and in the second step, the extrusion temperature is 170-175 ℃, and the rotating speed is 300 r/min.
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| CN117106291A (en) * | 2023-08-22 | 2023-11-24 | 广州俊谷塑料有限公司 | Degradable antibacterial material for 3D printing and preparation method thereof |
| CN117106291B (en) * | 2023-08-22 | 2024-02-02 | 广州俊谷塑料有限公司 | Degradable antibacterial material for 3D printing and preparation method thereof |
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