CN114957939A - Degradable composite material based on waste polylactic acid and preparation method thereof - Google Patents
Degradable composite material based on waste polylactic acid and preparation method thereof Download PDFInfo
- Publication number
- CN114957939A CN114957939A CN202210383628.9A CN202210383628A CN114957939A CN 114957939 A CN114957939 A CN 114957939A CN 202210383628 A CN202210383628 A CN 202210383628A CN 114957939 A CN114957939 A CN 114957939A
- Authority
- CN
- China
- Prior art keywords
- polylactic acid
- seaweed
- waste
- composite material
- waste polylactic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229920000747 poly(lactic acid) Polymers 0.000 title claims abstract description 90
- 239000004626 polylactic acid Substances 0.000 title claims abstract description 90
- 239000002699 waste material Substances 0.000 title claims abstract description 75
- 239000002131 composite material Substances 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 241001474374 Blennius Species 0.000 claims abstract description 24
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims description 33
- 239000010902 straw Substances 0.000 claims description 26
- 239000000843 powder Substances 0.000 claims description 20
- 238000003756 stirring Methods 0.000 claims description 14
- 238000001035 drying Methods 0.000 claims description 13
- 241000195474 Sargassum Species 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- -1 polybutylene adipate Polymers 0.000 claims description 7
- KDYFGRWQOYBRFD-UHFFFAOYSA-N succinic acid Chemical compound OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 claims description 6
- 229920002472 Starch Polymers 0.000 claims description 4
- ZFOZVQLOBQUTQQ-UHFFFAOYSA-N Tributyl citrate Chemical compound CCCCOC(=O)CC(O)(C(=O)OCCCC)CC(=O)OCCCC ZFOZVQLOBQUTQQ-UHFFFAOYSA-N 0.000 claims description 4
- 150000002148 esters Chemical class 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 239000008107 starch Substances 0.000 claims description 4
- 235000019698 starch Nutrition 0.000 claims description 4
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims description 3
- 239000004970 Chain extender Substances 0.000 claims description 3
- 229920002943 EPDM rubber Polymers 0.000 claims description 3
- 239000002202 Polyethylene glycol Substances 0.000 claims description 3
- JJTUDXZGHPGLLC-UHFFFAOYSA-N lactide Chemical compound CC1OC(=O)C(C)OC1=O JJTUDXZGHPGLLC-UHFFFAOYSA-N 0.000 claims description 3
- 229920001223 polyethylene glycol Polymers 0.000 claims description 3
- 239000001384 succinic acid Substances 0.000 claims description 3
- LIAWCKFOFPPVGF-UHFFFAOYSA-N 2-ethyladamantane Chemical class C1C(C2)CC3CC1C(CC)C2C3 LIAWCKFOFPPVGF-UHFFFAOYSA-N 0.000 claims description 2
- 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 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 2
- 241000195628 Chlorophyta Species 0.000 claims description 2
- 239000004593 Epoxy Chemical class 0.000 claims description 2
- 241000199919 Phaeophyceae Species 0.000 claims description 2
- 239000004793 Polystyrene Substances 0.000 claims description 2
- 241000206572 Rhodophyta Species 0.000 claims description 2
- YSMRWXYRXBRSND-UHFFFAOYSA-N TOTP Chemical class CC1=CC=CC=C1OP(=O)(OC=1C(=CC=CC=1)C)OC1=CC=CC=C1C YSMRWXYRXBRSND-UHFFFAOYSA-N 0.000 claims description 2
- 239000004359 castor oil Substances 0.000 claims description 2
- 235000019438 castor oil Nutrition 0.000 claims description 2
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical class OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 2
- 238000000748 compression moulding Methods 0.000 claims description 2
- IFDVQVHZEKPUSC-UHFFFAOYSA-N cyclohex-3-ene-1,2-dicarboxylic acid Chemical class OC(=O)C1CCC=CC1C(O)=O IFDVQVHZEKPUSC-UHFFFAOYSA-N 0.000 claims description 2
- 229920001971 elastomer Polymers 0.000 claims description 2
- 239000000806 elastomer Substances 0.000 claims description 2
- 150000002170 ethers Chemical class 0.000 claims description 2
- 235000019387 fatty acid methyl ester Nutrition 0.000 claims description 2
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 claims description 2
- 229920000578 graft copolymer Polymers 0.000 claims description 2
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 claims description 2
- 229960002479 isosorbide Drugs 0.000 claims description 2
- 229920001910 maleic anhydride grafted polyolefin Polymers 0.000 claims description 2
- YAFOVCNAQTZDQB-UHFFFAOYSA-N octyl diphenyl phosphate Chemical class C=1C=CC=CC=1OP(=O)(OCCCCCCCC)OC1=CC=CC=C1 YAFOVCNAQTZDQB-UHFFFAOYSA-N 0.000 claims description 2
- 150000003014 phosphoric acid esters Chemical class 0.000 claims description 2
- 229920000728 polyester Polymers 0.000 claims description 2
- 229920001451 polypropylene glycol Polymers 0.000 claims description 2
- 229920002223 polystyrene Polymers 0.000 claims description 2
- 239000012744 reinforcing agent Substances 0.000 claims description 2
- 239000003549 soybean oil Substances 0.000 claims description 2
- 235000012424 soybean oil Nutrition 0.000 claims description 2
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 claims description 2
- APVVRLGIFCYZHJ-UHFFFAOYSA-N trioctyl 2-hydroxypropane-1,2,3-tricarboxylate Chemical compound CCCCCCCCOC(=O)CC(O)(C(=O)OCCCCCCCC)CC(=O)OCCCCCCCC APVVRLGIFCYZHJ-UHFFFAOYSA-N 0.000 claims description 2
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims 3
- 241000015177 Saccharina japonica Species 0.000 claims 1
- 239000000654 additive Substances 0.000 claims 1
- 125000005498 phthalate group Chemical class 0.000 claims 1
- 229920006124 polyolefin elastomer Polymers 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 15
- 229910052799 carbon Inorganic materials 0.000 abstract description 6
- 238000003912 environmental pollution Methods 0.000 abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 3
- 238000011161 development Methods 0.000 abstract description 3
- 238000012986 modification Methods 0.000 abstract description 3
- 230000004048 modification Effects 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract description 3
- 239000003337 fertilizer Substances 0.000 abstract description 2
- 230000008092 positive effect Effects 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract description 2
- 230000000593 degrading effect Effects 0.000 abstract 1
- 230000001737 promoting effect Effects 0.000 abstract 1
- 238000011160 research Methods 0.000 abstract 1
- 238000007873 sieving Methods 0.000 description 21
- 241000512259 Ascophyllum nodosum Species 0.000 description 12
- 238000000197 pyrolysis Methods 0.000 description 11
- 238000012360 testing method Methods 0.000 description 11
- 238000001514 detection method Methods 0.000 description 10
- 238000002844 melting Methods 0.000 description 10
- 230000008018 melting Effects 0.000 description 10
- 238000005303 weighing Methods 0.000 description 10
- 238000000465 moulding Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 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 description 1
- 240000008415 Lactuca sativa Species 0.000 description 1
- 241001272996 Polyphylla fullo Species 0.000 description 1
- DOOTYTYQINUNNV-UHFFFAOYSA-N Triethyl citrate Chemical compound CCOC(=O)CC(O)(C(=O)OCC)CC(=O)OCC DOOTYTYQINUNNV-UHFFFAOYSA-N 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000009264 composting Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229920006238 degradable plastic Polymers 0.000 description 1
- 238000007723 die pressing method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- XNGIFLGASWRNHJ-UHFFFAOYSA-L phthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC=C1C([O-])=O XNGIFLGASWRNHJ-UHFFFAOYSA-L 0.000 description 1
- 229920005586 poly(adipic acid) Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 235000012045 salad Nutrition 0.000 description 1
- 239000001069 triethyl citrate Substances 0.000 description 1
- VMYFZRTXGLUXMZ-UHFFFAOYSA-N triethyl citrate Natural products CCOC(=O)C(O)(C(=O)OCC)C(=O)OCC VMYFZRTXGLUXMZ-UHFFFAOYSA-N 0.000 description 1
- 235000013769 triethyl citrate Nutrition 0.000 description 1
- LNYCJZRLMAMTQW-UHFFFAOYSA-N trioctyl 2-hydroxy-4-oxopentane-1,2,3-tricarboxylate Chemical compound CCCCCCCCOC(=O)CC(O)(C(=O)OCCCCCCCC)C(C(C)=O)C(=O)OCCCCCCCC LNYCJZRLMAMTQW-UHFFFAOYSA-N 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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L99/00—Compositions of natural macromolecular compounds or of derivatives thereof not provided for in groups C08L89/00 - C08L97/00
-
- 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
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/20—Recycled plastic
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Biological Depolymerization Polymers (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a degradable composite material based on waste polylactic acid and a preparation method thereof. The feed comprises the following raw materials in parts by weight: 10-90 parts of waste polylactic acid, 10-90 parts of seaweed and 0-30 parts of auxiliary agent, wherein the total weight of the waste polylactic acid, the seaweed and the auxiliary agent is 100 parts. The invention discovers that the seaweed can effectively improve the processing performance and the degradability of the waste polylactic acid material and has positive effects on the recovery, modification and reutilization of the waste polylactic acid. The invention researches and develops a waste polylactic acid-seaweed easily-degradable composite material based on the current development requirement of green materials by taking waste polylactic acid materials and seaweeds as breakthrough ports with high efficiency and low cost. Due to the addition of the seaweed, the prepared waste polylactic acid-seaweed composite material is easier to biodegrade than polylactic acid, thereby promoting the popularization and application of waste polylactic acid-based materials, intensively recycling and quickly degrading the waste polylactic acid-seaweed composite material into fertilizer for returning to the field, reducing the environmental pollution and reducing the carbon emission.
Description
The technical field is as follows:
the invention belongs to the field of biodegradable high polymer materials, and particularly relates to a degradable composite material based on waste polylactic acid and a preparation method thereof.
Background art:
in recent years, with the continuous improvement of environmental protection consciousness of people and the continuous promotion of the national policy of 'plastic forbidding' and 'double carbon', the degradable material meets new development opportunities. Polylactic acid is a completely biodegradable green material polymerized by using lactic acid which is a microbial fermentation product as a monomer, and has been widely applied in daily life. Polylactic acid is not only made into tableware, but also many degradable plastic bags, supermarket egg boxes and the like in the market are made of polylactic acid. Many major brands, including mcdonald, 7-11, harradas, starbucks, etc., use transparent cups made of polylactic acid to hold salad or ice, and even sony walkers, fushitong computer housings, toyota car interiors, etc., use polylactic acid materials. At present, the annual output of polylactic acid at foreign countries is about 12 ten thousand tons, the annual output of polylactic acid at home is about 4-5 ten thousand tons, and the annual output is expected to increase at a speed of 20% -30%. Although in theory polylactic acid could be completely decomposed into H by microorganisms 2 O and CO 2 Or CH 4 However, the decomposition time varies depending on the size of the polylactic acid product and the environment, and generally at least 2 months and even 2 years are required. Therefore, if the polylactic acid product is not recycled or rapidly degraded, the wide use of the polylactic acid still causes serious pollution to the environment, which is also an important limitation to the large-scale popularization and application of the polylactic acid productA bottleneck. The disposable waste polylactic acid products which are recovered in a centralized way at present are generally treated by adopting the modes of combustion, composting, burying and the like, and the carbon dioxide and the dioxin generated after plastic incineration cause global warming and environmental pollution. The waste polylactic acid has the defects of high brittleness, poor impact resistance, low thermal deformation temperature and the like, and the processing and the reutilization of the waste polylactic acid material are greatly limited. Therefore, the post-treatment of a large amount of waste polylactic acid products draws a great deal of attention, and the research and development of a recycling technology of waste polylactic acid products and a centralized recovery and rapid biodegradation technology thereof are urgently needed.
The invention content is as follows:
the invention aims to provide a polylactic acid-seaweed degradable composite material with controllable performance, easy degradation and low cost and a preparation method thereof.
The polylactic acid-seaweed degradable composite material comprises the following raw materials in parts by weight: 10-90 parts of waste polylactic acid, 10-90 parts of seaweed and 0-30 parts of auxiliary agent, wherein the total weight of the waste polylactic acid, the seaweed and the auxiliary agent is 100 parts.
The invention also provides a preparation method of the polylactic acid-seaweed degradable composite material with controllable performance, easy degradation and low cost, which comprises the following steps:
A. respectively crushing waste polylactic acid and seaweed to obtain polylactic acid powder and seaweed powder;
B. respectively drying polylactic acid powder and seaweed powder at 50-90 deg.C for 5-24 hr;
C. and D, uniformly mixing the polylactic acid powder, the seaweed powder and the auxiliary agent in the step B according to the proportion, then carrying out melt blending at high temperature, and carrying out compression molding to obtain the waste polylactic acid-seaweed degradable composite material.
Preferably, the waste polylactic acid in step a may be a waste polylactic acid material, such as one or more selected from disposable straws, disposable plastic bags, polylactic acid toys, daily-use polylactic acid living goods, and disposable medical polylactic acid goods.
Preferably, the seaweed in the step A is selected from one or more of red algae, brown algae and green algae.
Preferably, the auxiliary agent in step C is selected from polybutylene adipate/terephthalate, citric acid esters (tributyl citrate, trioctyl citrate, tributyl acetylcitrate, trioctyl acetylcitrate, etc.), ether esters (polyethylene glycol, polypropylene glycol, etc.), castor oil-derived esters, degradable polyesters (non-phthalate, etc.), isosorbide diesters, phosphoric acid esters (tricresyl phosphate, cresyldiphenyl phosphate, diphenyl monooctyl phosphate, etc.), epoxy esters (epoxidized soybean oil, epoxidized fatty acid methyl ester, epoxidized tetrahydrophthalate, etc.), maleic anhydride-grafted polymers (maleic anhydride-grafted polystyrene-polyethylene-polybutylene-polystyrene, maleic anhydride-grafted polyolefin elastomer, maleic anhydride-grafted ethylene propylene diene rubber), maleic anhydride-grafted ethylene propylene diene rubber, etc, One or more of isocyanate chain extender (diphenylmethane diisocyanate), acrylate melt reinforcing agent, starch, lactide and succinic acid.
Preferably, in step C, the blending temperature is 150-200 ℃.
Preferably, in step C, the stirring speed during blending is 30-250 rpm.
Preferably, in step C, the blending time is 3-30 min.
Compared with the prior art, the invention has the following advantages:
1. the secondary utilization of the waste polylactic acid can improve the comprehensive utilization value of the waste polylactic acid, further reduce the cost of raw materials and effectively avoid the problems of resource waste, environmental pollution and the like.
2. The invention has the advantages of low price of raw materials, mild preparation method and simple operation process, can greatly reduce the production cost of the materials, and is suitable for large-scale industrial application.
3. The composite material has good biodegradability.
China has rich seaweed resources. The inventor finds that the seaweed can effectively improve the processing performance and the degradability of the waste polylactic acid material and has a positive effect on the recovery, modification and reutilization of the waste polylactic acid. The invention develops a waste polylactic acid-seaweed degradable composite material by taking waste polylactic acid materials and seaweeds as breakthrough openings at high efficiency and low cost based on the development requirements of current green materials. Due to the addition of the seaweed, the prepared waste polylactic acid-seaweed degradable composite material is easier to degrade compared with polylactic acid, so that the popularization and application of waste polylactic acid-based materials are promoted, the waste polylactic acid-seaweed degradable composite material is intensively recovered and is quickly degraded into fertilizer to be returned to the field, the environmental pollution is reduced, and the carbon emission is reduced.
Examples of the embodiments
The present invention will be further described with reference to the following examples.
In order to better understand the present invention, the contents of the present invention are further illustrated below by the comparative examples and examples of the present invention, but the contents of the present invention are not limited thereto.
Comparative example 1:
crushing the disposable polylactic acid suction pipe, sieving the crushed polylactic acid suction pipe with a 20-mesh sieve, drying the crushed polylactic acid suction pipe for 10 hours at 70 ℃, then melting the crushed polylactic acid suction pipe at high temperature, stirring the melted polylactic acid suction pipe at 180 ℃ for 6 minutes at a stirring speed of 60rpm, and pressing the crushed polylactic acid suction pipe for 6 minutes at a pressure of 15MPa at 180 ℃ to obtain a standard sample strip for testing mechanical properties. The tensile strength of the material prepared by the comparative example is 43.9MPa, the elongation at break is 9.9 percent, and the initial pyrolysis temperature is 350.9 ℃.
Example 1:
pulverizing disposable polylactic acid straw, sieving with 20 mesh sieve, pulverizing Sargassum, sieving with 200 mesh sieve, and drying at 70 deg.C for 10 hr. Weighing waste polylactic acid and sargassum powder according to the mass ratio of 90:10, melting and blending at high temperature, wherein the blending temperature is 180 ℃, the blending stirring speed is 60rpm, the blending time is 6min, and pressing for 6min at the pressure of 15MPa at 180 ℃ to obtain a standard sample strip for testing mechanical properties. Through detection, the tensile strength of the waste polylactic acid-seaweed degradable composite material prepared by the embodiment is 33.6MPa, the breaking elongation rate is 5.8%, and the initial pyrolysis temperature is 315.7 ℃.
Example 2:
crushing the waste polylactic acid straw and sieving the crushed waste polylactic acid straw with a 100-mesh sieve, crushing the gulfweed and sieving the crushed gulfweed with a 200-mesh sieve, and drying the gulfweed for 5 hours at 90 ℃. Weighing waste polylactic acid and sargassum powder according to the mass ratio of 70:30, melting and blending at high temperature of 180 ℃, blending and stirring at 250rpm for 30min, and molding at 180 ℃ under the pressure of 15MPa for 6min to obtain a standard sample strip for testing mechanical properties. Through detection, the tensile strength of the waste polylactic acid-seaweed degradable composite material prepared by the embodiment is 30.3
MPa, the elongation at break of 3.6 percent and the initial pyrolysis temperature of 300.2 ℃.
Example 3:
crushing the waste polylactic acid tray, sieving the crushed waste polylactic acid tray with a 100-mesh sieve, crushing the gulfweed tray, sieving the crushed gulfweed tray with a 200-mesh sieve, and drying the gulfweed tray for 10 hours at 70 ℃. Weighing waste polylactic acid and sargassum powder according to the mass ratio of 50:50, melting and blending at high temperature of 180 ℃, blending and stirring at 30rpm for 6min, and molding at 180 ℃ under the pressure of 15MPa for 6min to obtain a standard sample strip for testing mechanical properties. Through detection, the tensile strength of the waste polylactic acid-seaweed degradable composite material prepared by the embodiment is 27.6MPa, the breaking elongation rate is 2.8%, and the initial pyrolysis temperature is 291.2 ℃.
Example 4:
crushing the waste polylactic acid suction pipe, sieving by a 100-mesh sieve, crushing the gulfweed, sieving by a 200-mesh sieve, and drying at 70 ℃ for 10 hours. Weighing waste polylactic acid, sargassum powder and diphenylmethane diisocyanate according to the mass ratio of 30:69:1, carrying out melt blending at a high temperature of 150 ℃, at a blending stirring speed of 60rpm for 6min, and carrying out die pressing at a temperature of 180 ℃ and a pressure of 15MPa for 6min to obtain a standard sample strip for testing mechanical properties. Through detection, the tensile strength of the waste polylactic acid-seaweed degradable composite material prepared by the embodiment is 27.6MPa, the elongation at break is 2.8%, and the initial pyrolysis temperature is 278.2 ℃.
Example 5:
crushing the waste polylactic acid straws, sieving the crushed waste polylactic acid straws with a 100-mesh sieve, crushing the gulfweed straws, sieving the crushed gulfweed straws with a 200-mesh sieve, and drying the gulfweed straws for 10 hours at 50 ℃. Weighing waste polylactic acid and sargassum powder according to the mass ratio of 10:90, melting and blending at high temperature of 180 ℃, blending and stirring at 60rpm for 5min, and molding at 180 ℃ under the pressure of 15MPa for 6min to obtain a standard sample strip for testing mechanical properties. Through detection, the tensile strength of the waste polylactic acid-seaweed degradable composite material prepared by the embodiment is 5.6MPa, the breaking elongation percentage is 0.8%, and the initial pyrolysis temperature is 215.6 ℃.
Example 6:
crushing the waste polylactic acid straw, sieving the crushed waste polylactic acid straw with a 100-mesh sieve, crushing the kelp, sieving the crushed kelp with a 200-mesh sieve, and drying the kelp at 70 ℃ for 10 hours. Weighing waste polylactic acid, kelp powder, poly adipic acid/butylene terephthalate and starch according to the mass ratio of 50:15:30:5, melting and blending at a high temperature of 200 ℃, at a blending stirring speed of 50rpm for 3min, and molding at a temperature of 180 ℃ and a pressure of 15MPa for 6min to obtain a standard sample strip for mechanical property testing. Through detection, the tensile strength of the waste polylactic acid-seaweed degradable composite material prepared by the embodiment is 16.5MPa, the breaking elongation rate is 8.12%, and the initial pyrolysis temperature is 264.2 ℃.
Example 7:
crushing the waste polylactic acid straws, sieving the crushed waste polylactic acid straws with a 20-mesh sieve, crushing the gulfweed straws, sieving the crushed gulfweed straws with a 200-mesh sieve, and drying the gulfweed straws for 10 hours at 70 ℃. Weighing waste polylactic acid, gulfweed and polyethylene glycol according to the mass ratio of 67:29:4, melting and blending at a high temperature of 180 ℃, blending and stirring at a speed of 30rpm for 4min, and molding at a temperature of 180 ℃ and a pressure of 15MPa for 6min to obtain a standard sample strip for testing mechanical properties. Through detection, the tensile strength of the waste polylactic acid-seaweed degradable composite material prepared by the comparative example is 21.8MPa, the elongation at break is 4.5%, and the initial pyrolysis temperature is 313.7 ℃.
Example 8:
crushing the waste polylactic acid straws, sieving the crushed waste polylactic acid straws with a 20-mesh sieve, crushing the gulfweed straws, sieving the crushed gulfweed straws with a 200-mesh sieve, and drying the gulfweed straws for 10 hours at 70 ℃. Weighing waste polylactic acid, gulfweed, starch and succinic acid according to the mass ratio of 68:15:15:2, melting and blending at the high temperature of 170 ℃, the blending stirring speed of 30rpm, the blending time of 4min, and molding for 6min at the pressure of 15MPa at the temperature of 180 ℃ to obtain a standard sample strip for testing mechanical properties. Through detection, the tensile strength of the waste polylactic acid-seaweed degradable composite material prepared by the embodiment is 22.7MPa, the elongation at break is 3.4%, and the initial pyrolysis temperature is 304.6 ℃.
Example 9:
crushing the waste polylactic acid straw, sieving the crushed waste polylactic acid straw with a 20-mesh sieve, crushing the kelp, sieving the crushed kelp with a 200-mesh sieve, and drying the kelp at 90 ℃ for 10 hours. Weighing waste polylactic acid, kelp powder and triethyl citrate according to the mass ratio of 40:40:20, melting and blending at a high temperature of 180 ℃, blending and stirring at a speed of 30rpm for 4min, and molding at a temperature of 180 ℃ and a pressure of 15MPa for 6min to obtain a standard sample strip for testing mechanical properties. Through detection, the tensile strength of the waste polylactic acid-seaweed degradable composite material prepared by the embodiment is 3.7MPa, the elongation at break is 93.1%, and the initial pyrolysis temperature is 224.6 ℃.
Example 10:
crushing the waste polylactic acid straw, sieving the crushed waste polylactic acid straw with a 20-mesh sieve, crushing the kelp, sieving the crushed kelp with a 200-mesh sieve, and drying the kelp for 24 hours at 50 ℃. Weighing waste polylactic acid, kelp powder and lactide according to a mass ratio of 68:30:2, melting and blending at a high temperature of 180 ℃, at a blending stirring speed of 30rpm for 4min, and molding at a pressure of 15MPa at 160 ℃ for 6min to obtain a standard sample strip for mechanical property testing. Through detection, the tensile strength of the waste polylactic acid-seaweed degradable composite material prepared by the embodiment is 18.7MPa, the breaking elongation rate is 3.1%, and the initial pyrolysis temperature is 258.0 ℃.
While embodiments of the present invention have been described above, the present invention is not limited to the specific embodiments and applications described above, which are intended to be illustrative, instructive, and not limiting. Those skilled in the art, having the benefit of this disclosure, may effect numerous modifications thereto without departing from the scope of the invention as defined by the appended claims.
Claims (9)
1. The polylactic acid-seaweed degradable composite material is characterized by comprising the following raw materials in parts by weight: 10-90 parts of waste polylactic acid, 10-90 parts of seaweed and 0-30 parts of auxiliary agent, wherein the total weight of the waste polylactic acid, the seaweed and the auxiliary agent is 100 parts.
2. The preparation method of the polylactic acid-seaweed degradable composite material as claimed in claim 1, which comprises the following steps:
A. respectively crushing waste polylactic acid and seaweed to obtain polylactic acid powder and seaweed powder;
B. respectively drying polylactic acid powder and seaweed powder at 50-90 deg.C for 5-24 hr;
C. and D, uniformly mixing the polylactic acid powder, the seaweed powder and the auxiliary agent in the step B according to the proportion, then carrying out melt blending at high temperature, and carrying out compression molding to obtain the polylactic acid-seaweed degradable composite material.
3. The preparation method according to claim 2, wherein the waste polylactic acid in the step A is one or more selected from disposable straws, disposable plastic bags, polylactic acid toys, daily-use polylactic acid living goods and disposable medical polylactic acid goods.
4. The method according to claim 2, wherein the seaweed in step A is selected from one or more of red algae, brown algae and green algae.
5. The method according to claim 4, wherein the seaweed is Sargassum or Laminaria japonica.
6. The method of claim 2, wherein the additives in step C are selected from the group consisting of polybutylene adipate/terephthalate, citric acid esters including but not limited to tributyl citrate, trioctyl citrate, tributyl acetyl citrate, trioctyl acetyl citrate, ether esters including but not limited to polyethylene glycol, polypropylene glycol, castor oil derived esters, degradable polyesters including but not limited to non-phthalates, etc., isosorbide diesters, phosphoric acid esters including but not limited to tricresyl phosphate, cresyldiphenyl phosphate, diphenyl monooctyl phosphate, epoxy esters including but not limited to epoxidized soybean oil, epoxidized fatty acid methyl esters, epoxidized tetrahydrophthalates, maleic anhydride grafted polymers including but not limited to maleic anhydride grafted polystyrene-polyethylene-polybutylene-polystyrene, The modified polyolefin elastomer is characterized by comprising a maleic anhydride grafted polyolefin elastomer, a maleic anhydride grafted ethylene propylene diene monomer rubber and an isocyanate chain extender, wherein the chain extender comprises one or more of diphenylmethane diisocyanate, an acrylate melt reinforcing agent, starch, lactide and succinic acid.
7. The method as claimed in claim 2, wherein the blending temperature in step C is 150-200 ℃.
8. The process according to claim 2, wherein in the step C, the stirring speed at the time of blending is from 30 to 250 rpm.
9. The method of claim 2, wherein in step C, the blending time is 3-30 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210383628.9A CN114957939A (en) | 2022-04-12 | 2022-04-12 | Degradable composite material based on waste polylactic acid and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210383628.9A CN114957939A (en) | 2022-04-12 | 2022-04-12 | Degradable composite material based on waste polylactic acid and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114957939A true CN114957939A (en) | 2022-08-30 |
Family
ID=82977391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210383628.9A Pending CN114957939A (en) | 2022-04-12 | 2022-04-12 | Degradable composite material based on waste polylactic acid and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114957939A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116444845A (en) * | 2023-03-16 | 2023-07-18 | 珠海市城市排水有限公司 | Modified biodegradable straw and preparation method and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060039968A (en) * | 2004-11-04 | 2006-05-10 | 송효주 | Composition and method to produce the biodegradable flexible polylactic acid resin using seaweeds |
| CN109627718A (en) * | 2018-12-11 | 2019-04-16 | 贵州大学 | A kind of full biodegradable component toughening PLA composite material and preparation method |
| KR20200085252A (en) * | 2020-07-01 | 2020-07-14 | 김병용 | Environmental-friendly polymer composition and method of fabricating the same |
| CN113234304A (en) * | 2021-05-11 | 2021-08-10 | 贵州省材料产业技术研究院 | Biodegradable film material and preparation method of film |
-
2022
- 2022-04-12 CN CN202210383628.9A patent/CN114957939A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060039968A (en) * | 2004-11-04 | 2006-05-10 | 송효주 | Composition and method to produce the biodegradable flexible polylactic acid resin using seaweeds |
| CN109627718A (en) * | 2018-12-11 | 2019-04-16 | 贵州大学 | A kind of full biodegradable component toughening PLA composite material and preparation method |
| KR20200085252A (en) * | 2020-07-01 | 2020-07-14 | 김병용 | Environmental-friendly polymer composition and method of fabricating the same |
| CN113234304A (en) * | 2021-05-11 | 2021-08-10 | 贵州省材料产业技术研究院 | Biodegradable film material and preparation method of film |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116444845A (en) * | 2023-03-16 | 2023-07-18 | 珠海市城市排水有限公司 | Modified biodegradable straw and preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101805499B (en) | Full-degradable thermoplastic composite material and sheet thereof | |
| CN103992517B (en) | One can be continuously produced fully-degradable starch base plastic alloy and preparation method thereof | |
| CN113861635A (en) | Starch modified PBAT/PLA biodegradable plastic film and preparation method thereof | |
| CN102277005B (en) | Highly-filled fully-biodegradable packaging material | |
| CN106832801A (en) | A kind of lignin modification PBAT biodegradable plastics and preparation method thereof | |
| CN101516996B (en) | Masterbatch and polymer composition | |
| CN106589854B (en) | A kind of full biology base PBSA biodegradable plastics of lignin modification and preparation method thereof | |
| Wu | Characterization and biodegradability of polyester bioplastic-based green renewable composites from agricultural residues | |
| CN106589871A (en) | Lignin modified PHA biodegradable plastic and preparing method thereof | |
| CN105440606A (en) | Preparation method of fully biodegradable starch/polylactic acid base resin | |
| CN103627153A (en) | Entire biodegradation PLA/PBAT composite material and preparing method therefor | |
| CN106700442B (en) | A kind of lignin modification PBS biodegradable plastic and preparation method thereof | |
| CN104312121A (en) | High-toughness transparent polylactic acid film and preparing method thereof | |
| CN102391631A (en) | Biodegradable anti-static macromolecule composite material and preparation method of the same | |
| CN109627718B (en) | Full-biodegradable component toughened PLA composite material and preparation method thereof | |
| CN113201172A (en) | Coffee grounds degradable cold drink straw and preparation method thereof | |
| CN106700460A (en) | Lignin modified PCL biodegradable plastic and preparation method thereof | |
| EP3162841B1 (en) | A biodegradable biocompostable biodigestible plastic | |
| CN114957939A (en) | Degradable composite material based on waste polylactic acid and preparation method thereof | |
| CN113429764A (en) | starch/PLA-PGA-PBAT biodegradable and compostable special material and preparation method thereof | |
| CN114933785A (en) | Modified lignin/PBAT biodegradable plastic and preparation method thereof | |
| CN106009565B (en) | A kind of nylon enhancing lactic acid composite material and preparation method thereof | |
| CN104945870A (en) | All-biodegradable modified polylactic acid film-blowing resin and preparation method thereof | |
| CN108948679A (en) | A kind of lignin modification starch base PBAT biodegrade membrane material and preparation method thereof | |
| CN107022177A (en) | A kind of polylactic acid/starch/powder of straw Biobased degradable composite material and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |