CN111732780A - Controllable degradable plastic garbage bag and preparation method thereof - Google Patents
Controllable degradable plastic garbage bag and preparation method thereof Download PDFInfo
- Publication number
- CN111732780A CN111732780A CN202010139086.1A CN202010139086A CN111732780A CN 111732780 A CN111732780 A CN 111732780A CN 202010139086 A CN202010139086 A CN 202010139086A CN 111732780 A CN111732780 A CN 111732780A
- Authority
- CN
- China
- Prior art keywords
- starch
- portland cement
- garbage bag
- parts
- cement clinker
- 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
- 229920006238 degradable plastic Polymers 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title claims description 7
- 239000011398 Portland cement Substances 0.000 claims abstract description 51
- 229920002472 Starch Polymers 0.000 claims abstract description 38
- 235000019698 starch Nutrition 0.000 claims abstract description 38
- 239000008107 starch Substances 0.000 claims abstract description 38
- 230000015556 catabolic process Effects 0.000 claims abstract description 28
- 238000006731 degradation reaction Methods 0.000 claims abstract description 28
- 238000002156 mixing Methods 0.000 claims abstract description 26
- -1 polyethylene Polymers 0.000 claims abstract description 22
- 239000007822 coupling agent Substances 0.000 claims abstract description 21
- 239000004698 Polyethylene Substances 0.000 claims abstract description 19
- 229920000573 polyethylene Polymers 0.000 claims abstract description 19
- 239000002994 raw material Substances 0.000 claims abstract description 14
- 239000004014 plasticizer Substances 0.000 claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 239000000843 powder Substances 0.000 claims description 38
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 28
- 229920003023 plastic Polymers 0.000 claims description 28
- 239000004033 plastic Substances 0.000 claims description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 238000003756 stirring Methods 0.000 claims description 22
- 238000007664 blowing Methods 0.000 claims description 11
- 238000001035 drying Methods 0.000 claims description 11
- 238000000227 grinding Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 11
- 150000004645 aluminates Chemical class 0.000 claims description 10
- 235000011187 glycerol Nutrition 0.000 claims description 10
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 6
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 5
- 239000003469 silicate cement Substances 0.000 claims description 5
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims description 2
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims description 2
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims description 2
- 229920002261 Corn starch Polymers 0.000 claims description 2
- 240000002853 Nelumbo nucifera Species 0.000 claims description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 claims description 2
- 239000005642 Oleic acid Substances 0.000 claims description 2
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- 240000004922 Vigna radiata Species 0.000 claims description 2
- 235000010721 Vigna radiata var radiata Nutrition 0.000 claims description 2
- 235000011469 Vigna radiata var sublobata Nutrition 0.000 claims description 2
- 230000003213 activating effect Effects 0.000 claims description 2
- 239000008120 corn starch Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims description 2
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 2
- 229920001592 potato starch Polymers 0.000 claims description 2
- 229940100486 rice starch Drugs 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 6
- 238000001125 extrusion Methods 0.000 abstract description 4
- 238000010096 film blowing Methods 0.000 abstract description 4
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 10
- 238000006703 hydration reaction Methods 0.000 description 10
- 229920000092 linear low density polyethylene Polymers 0.000 description 10
- 239000004707 linear low-density polyethylene Substances 0.000 description 10
- 239000007787 solid Substances 0.000 description 10
- 229910052918 calcium silicate Inorganic materials 0.000 description 9
- 239000000378 calcium silicate Substances 0.000 description 9
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 9
- 230000036571 hydration Effects 0.000 description 9
- 229920001912 maleic anhydride grafted polyethylene Polymers 0.000 description 9
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 8
- 244000068988 Glycine max Species 0.000 description 8
- 235000010469 Glycine max Nutrition 0.000 description 8
- 239000002689 soil Substances 0.000 description 8
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 7
- 239000002245 particle Substances 0.000 description 6
- 229910000019 calcium carbonate Inorganic materials 0.000 description 4
- 239000002985 plastic film Substances 0.000 description 4
- 229920006255 plastic film Polymers 0.000 description 4
- 229920000704 biodegradable plastic Polymers 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000593 degrading effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000001782 photodegradation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- AWFYPPSBLUWMFQ-UHFFFAOYSA-N 2-[5-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]-1,3,4-oxadiazol-2-yl]-1-(1,4,6,7-tetrahydropyrazolo[4,3-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C1=NN=C(O1)CC(=O)N1CC2=C(CC1)NN=C2 AWFYPPSBLUWMFQ-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- VCUFZILGIRCDQQ-KRWDZBQOSA-N N-[[(5S)-2-oxo-3-(2-oxo-3H-1,3-benzoxazol-6-yl)-1,3-oxazolidin-5-yl]methyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C1O[C@H](CN1C1=CC2=C(NC(O2)=O)C=C1)CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F VCUFZILGIRCDQQ-KRWDZBQOSA-N 0.000 description 1
- OGIIWTRTOXDWEH-UHFFFAOYSA-N [O].[O-][O+]=O Chemical compound [O].[O-][O+]=O OGIIWTRTOXDWEH-UHFFFAOYSA-N 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000002144 chemical decomposition reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000013033 photocatalytic degradation reaction Methods 0.000 description 1
- 239000003504 photosensitizing agent Substances 0.000 description 1
- 239000013502 plastic waste Substances 0.000 description 1
- 229920000747 poly(lactic acid) Polymers 0.000 description 1
- 239000004626 polylactic acid Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/08—Copolymers of ethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2403/00—Characterised by the use of starch, amylose or amylopectin or of their derivatives or degradation products
- C08J2403/02—Starch; Degradation products thereof, e.g. dextrin
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2451/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
- C08J2451/06—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/05—Alcohols; Metal alcoholates
- C08K5/053—Polyhydroxylic alcohols
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Wrappers (AREA)
- Bag Frames (AREA)
- Refuse Receptacles (AREA)
Abstract
The invention provides a controllable degradable plastic garbage bag, which is prepared from the following raw materials: polyethylene, hydrated portland cement raw material, starch, compatilizer, plasticizer and coupling agent are subjected to melt blending, extrusion and film blowing to obtain the high-strength polyethylene film. The manufacturing method is simple, and the manufactured garbage bag has high degradation efficiency and obvious ecological benefit and economic benefit.
Description
Technical Field
The invention relates to a controllable degradable plastic garbage bag, and belongs to the field of production and application of plastic garbage bags.
Background
Plastic film garbage bags have been used in various fields of people's lives and become an indispensable part of our lives. At the same time, the stability and durability of plastics are constantly improved by technological advances, and many environmental impacts are resisted, and the sunrise 'white revolution' is evolved into increasingly serious 'white pollution' by the large amount of plastic waste. It is known that synthetic polymer materials have a certain environmental degradability, which is partially degraded by the combined action of light, heat, water, gas and microorganisms. The degradation of plastics takes place according to the principle that the change of physical and chemical properties of any high molecular material is attributed to the environmental factors such as light, heat, humidity, chemical conditions and biological influence. The degradable plastic is a novel functional material, and the technology is continuously developed and the application is continuously developed from the world. The degradation of plastics can be divided into several ways such as photodegradation, radiation degradation, thermal degradation, chemical degradation, oxygen (ozone) degradation, microbial degradation, etc., wherein the more important for degrading plastics are photodegradation plastics, biodegradation plastics, and thermal oxidation degradation plastics.
The photodegradable plastic is prepared by incorporating a photosensitizer into the plastic and gradually decomposing the plastic under the sunlight. It belongs to an earlier generation of degradable plastics, and the garbage bag prepared by adopting the plastic has the defect that the degradation time is difficult to predict due to sunshine and climate change, so that the degradation time cannot be controlled.
The biodegradable plastic can be completely decomposed into low molecular compound plastic under the action of microorganisms. It features convenient storage and transportation, and no need of light shielding as long as it is kept dry. The degradable plastics such as PHA, polylactic acid and the like are the most excellent in performance among the biodegradable plastics, and are still in the market starting stage due to higher cost and more complex production process.
Disclosure of Invention
The problems solved by the invention are as follows:
the invention provides a new solution for solving the problems that the cost of the existing biodegradable plastic garbage bag is high, the production process is complex and the degradation time of a photocatalytic degradation film is uncontrollable.
The technical scheme of the invention is as follows:
the invention aims to provide a controllable degradable plastic garbage bag aiming at the defects of the prior technical scheme, and the controllable degradable plastic garbage bag provided by the invention is prepared from the following raw materials: polyethylene, hydrated Portland cement, starch, a compatilizer, a plasticizer and a coupling agent are subjected to melt blending, extrusion and film blowing to obtain the high-strength polyethylene film.
The garbage bag is formed by the following components in parts by weight through melt blending, extrusion and film blowing:
40-60% of polyethylene
10-30 parts of hydrated portland cement clinker powder
5-10% of starch
1 to 5 parts of a compatibilizer
1 to 3 parts of a plasticizer
0.1 to 0.5 of coupling agent
The polyethylene is film-grade polyethylene and is one of LLDPE and LDPE.
The hydrated portland cement clinker is a product which takes calcium silicate as a main component and is prepared by burning raw materials to be partially melted, and the preparation method of the portland cement clinker particles comprises the steps of grinding the portland cement clinker to be 500 +/-10 m2/kg of specific surface area, adding water, 0.4 of water/solid ratio, 0.2 percent of triethanolamine (calculated by clinker powder), stirring at room temperature for 4-12 h, and drying at 120 ℃ to constant weight to obtain powder.
The starch is at least one of rice starch, corn starch, mung bean starch, lotus root starch and potato starch.
The compatilizer is one of polyethylene grafted maleic anhydride, polyethylene grafted oleic acid, POE grafted maleic anhydride and polyethylene wax grafted maleic anhydride.
The plasticizer is one of glycerin, low molecular weight polyvinyl alcohol and glycol.
The coupling agent is one of aluminate coupling agent or titanate coupling agent
The preparation method of the controllable degradable plastic garbage bag comprises the following steps:
(1) preparing plasticized starch: adding starch into a high-speed stirrer, adding a plasticizer, treating for 30 minutes, standing for more than 24 hours, and curing;
(2) preparing and activating hydrated portland cement clinker micro powder: the raw material of the commercially available hydrated portland cement is burned to be partially melted to obtain a product containing calcium silicate as a main component, thereby obtaining portland cement clinker. Grinding Portland cement clinker to 500 +/-10 m2/kg of specific surface area, adding water, the water/solid ratio is 0.4, adding triethanolamine (accounting for 0.2 percent of clinker powder), stirring for 4, 8 and 12 hours at room temperature, and drying at 120 ℃ to constant weight to obtain hydrated Portland cement clinker powder. Putting the silicate cement clinker particles into a high-speed mixer, stirring and heating to 105-120 ℃, adding a coupling agent after 10 minutes, continuing stirring for 5 minutes, and taking out;
(3) primary mixing: mixing the plasticized starch, the activated portland cement clinker powder, the polyethylene and the compatilizer in a high-speed mixer according to a formula;
(4) extrusion and film blowing: and adding the primarily mixed raw materials into an extruder, extruding and blowing a film, and preparing to obtain the garbage bag.
Has the advantages that:
compared with the prior art, the invention has the characteristics and advantages that:
(1) the application of the invention adds the portland cement clinker as a degradation agent. The cement clinker and water produce hydration reaction to produce hydrated calcium silicate and calcium aluminate, which are fibrous or flaky, have micron and nanometer size and high strength, and are added into polyethylene to strengthen physical crosslinking. When the garbage bag is in use, CO in the air2Permeating into the film, and reacting with calcium silicate hydrate and calcium aluminate to generate calcium carbonate. Calcium carbonate has a cubic structure and a lower strength than calcium silicate hydrate and calcium aluminate. As the reaction proceeds, the high-strength fiber or flake particles gradually become low-strength powder particles, and the physical crosslinking strengthening effect in the polyethylene film gradually decreases to disappear. Meanwhile, the density of the formed calcium carbonate is less than that of calcium silicate hydrate and calcium aluminate, so that the size of particles in the polyethylene film is increased, and micropores are formed on the plastic film. For the above reasons, the original structure of the polyethylene plastic film is damaged.The formation of numerous micropores greatly increases the opportunity for microorganisms to come into contact with the plasticized starch in the film, causing further disruption of the polyethylene structure and thus degradation.
(2) The perfection of the calcium silicate hydrate and calcium aluminate structures obtained in the hydration process of the silicate cement clinker is related to the hydration stirring time, the longer the hydration stirring time is, the higher the perfection of the formed calcium silicate hydrate and calcium aluminate is, the longer the formed fiber is, the higher the density is, and the more difficult the formed fiber is to be connected with CO2And (4) reacting. Therefore, the amount and the size of the formed calcium carbonate can be controlled by controlling the hydration stirring time and the addition amount of the portland cement clinker, and the degradation time of the plastic garbage bag is further controlled, thereby achieving the purpose of controllable degradation.
The cement clinker particles adopted by the method are used as a degrading agent and are matched with the plasticized starch to play a role in synergistic degradation, the raw materials are cheap and easy to obtain, and the process is simple;
and the degradation time of the plastic film garbage bag is controlled by changing the hydration stirring time and the addition amount of the portland cement clinker.
Detailed Description
The technical solution of the present invention is clearly and completely described below. It should be noted that the examples are given solely for the purpose of illustration and are not to be construed as limitations on the scope of the invention, as many insubstantial modifications and variations of the invention may be made by those skilled in the art without departing from the spirit of the invention
Example 1
Mixing 30 parts of glycerol and 70 parts of soybean starch to obtain plasticized starch, and standing for 24 hours for later use.
Grinding portland cement clinker to a specific surface area of 500 +/-10 m2/kg, adding water with a water/solid ratio of 0.4, adding triethanolamine (accounting for 0.2% of clinker powder), stirring at room temperature for 4h, and drying at 120 ℃ to constant weight to obtain hydrated powder; 100 parts of hydrated powder and 1 part of aluminate coupling agent are mixed in a high-speed mixer for 10 minutes to obtain the activated portland cement clinker micropowder. And (3) mixing 10 parts of plasticized starch, 60 parts of LLDPE, 5 parts of maleic anhydride grafted polyethylene and 30 parts of Portland cement clinker micropowder at a high speed for 10 minutes, and extruding and blowing a film to obtain the degradable plastic garbage bag.
The prepared plastic garbage bag is buried in the soil and is completely degraded after 186 days.
Example 2
Mixing 30 parts of glycerol and 70 parts of soybean starch, and standing for 24 hours for later use. Grinding portland cement clinker to a specific surface area of 500 +/-10 m2/kg, adding water with a water/solid ratio of 0.4, adding triethanolamine (accounting for 0.2% of clinker powder), stirring at room temperature for 6h, and drying at 120 ℃ to constant weight to obtain hydrated powder; 100 parts of hydrated powder and 1 part of aluminate coupling agent are mixed in a high-speed mixer for 10 minutes to obtain the activated portland cement clinker micropowder. And (3) mixing 10 parts of plasticized starch, 60 parts of LLDPE, 5 parts of maleic anhydride grafted polyethylene and 30 parts of Portland cement clinker micropowder at a high speed for 10 minutes, and extruding and blowing a film to obtain the degradable plastic garbage bag.
The prepared plastic garbage bag is buried in the soil and is completely degraded after 205 days.
Example 3
Mixing 30 parts of glycerol and 70 parts of soybean starch, and standing for 24 hours for later use. Grinding portland cement clinker to a specific surface area of 500 +/-10 m2/kg, adding water with a water/solid ratio of 0.4, adding triethanolamine (accounting for 0.2% of clinker powder), stirring at room temperature for 8h, and drying at 120 ℃ to constant weight to obtain hydrated powder; 100 parts of hydrated powder and 1 part of aluminate coupling agent are mixed in a high-speed mixer for 10 minutes to obtain the activated portland cement clinker micropowder. And (3) mixing 10 parts of plasticized starch, 60 parts of LLDPE, 5 parts of maleic anhydride grafted polyethylene and 30 parts of Portland cement clinker micropowder at a high speed for 10 minutes, and extruding and blowing a film to obtain the degradable plastic garbage bag.
The prepared plastic garbage bag is buried in the soil and is completely degraded after 236 days.
Example 4
Mixing 30 parts of glycerol and 70 parts of soybean starch, and standing for 24 hours for later use. Grinding portland cement clinker to a specific surface area of 500 +/-10 m2/kg, adding water with a water/solid ratio of 0.4, adding triethanolamine (accounting for 0.2% of clinker powder), stirring at room temperature for 10h, and drying at 120 ℃ to constant weight to obtain hydrated powder; 100 parts of hydrated powder and 1 part of aluminate coupling agent are mixed in a high-speed mixer for 10 minutes to obtain the activated portland cement clinker micropowder. And (3) mixing 10 parts of plasticized starch, 60 parts of LLDPE, 5 parts of maleic anhydride grafted polyethylene and 30 parts of Portland cement clinker micropowder at a high speed for 10 minutes, and extruding and blowing a film to obtain the degradable plastic garbage bag.
The prepared plastic garbage bag is buried in the soil and is completely degraded after 281 days.
Example 5
Mixing 30 parts of glycerol and 70 parts of soybean starch, and standing for 24 hours for later use. Grinding portland cement clinker to a specific surface area of 500 +/-10 m2/kg, adding water with a water/solid ratio of 0.4, adding triethanolamine (accounting for 0.2% of clinker powder), stirring at room temperature for 12h, and drying at 120 ℃ to constant weight to obtain hydrated powder; 100 parts of hydrated powder and 1 part of aluminate coupling agent are mixed in a high-speed mixer for 10 minutes to obtain the activated portland cement clinker micropowder. And (3) mixing 10 parts of plasticized starch, 60 parts of LLDPE, 5 parts of maleic anhydride grafted polyethylene and 30 parts of Portland cement clinker micropowder at a high speed for 10 minutes, and extruding and blowing a film to obtain the degradable plastic garbage bag.
The prepared plastic garbage bag is buried in the soil and is completely degraded after 323 days.
Example 6
Mixing 30 parts of glycerol and 70 parts of soybean starch, and standing for 24 hours for later use. Grinding portland cement clinker to a specific surface area of 500 +/-10 m2/kg, adding water with a water/solid ratio of 0.4, adding triethanolamine (accounting for 0.2% of clinker powder), stirring at room temperature for 4h, and drying at 120 ℃ to constant weight to obtain hydrated powder; and mixing 100 parts of hydrated powder and 1 part of aluminate coupling agent in a high-speed mixer for 10 minutes to obtain the activated portland cement clinker micropowder. And (3) mixing 10 parts of plasticized starch, 60 parts of LLDPE, 5 parts of maleic anhydride grafted polyethylene and 20 parts of Portland cement clinker micropowder at a high speed for 10 minutes, and extruding and blowing a film to obtain the degradable plastic garbage bag.
The prepared plastic garbage bag is buried in the soil and is completely degraded after 198 days.
Example 7
Mixing 30 parts of glycerol and 70 parts of soybean starch, and standing for 24 hours for later use. Grinding portland cement clinker to a specific surface area of 500 +/-10 m2/kg, adding water with a water/solid ratio of 0.4, adding triethanolamine (accounting for 0.2% of clinker powder), stirring at room temperature for 4h, and drying at 120 ℃ to constant weight to obtain hydrated powder; and mixing 100 parts of hydrated powder and 1 part of aluminate coupling agent in a high-speed mixer for 10 minutes to obtain the activated portland cement clinker micropowder. And (3) mixing 10 parts of plasticized starch, 60 parts of LLDPE, 5 parts of maleic anhydride grafted polyethylene and 10 parts of silicate cement clinker micropowder at a high speed for 10 minutes, and extruding and blowing a film to obtain the degradable plastic garbage bag.
The prepared plastic garbage bag is buried in the soil and is completely degraded after 206 days.
Comparative example:
mixing 30 parts of glycerol and 70 parts of soybean starch, and standing for 24 hours for later use. Grinding portland cement clinker to a specific surface area of 500 +/-10 m2/kg, adding water with a water/solid ratio of 0.4, adding triethanolamine (accounting for 0.2% of clinker powder), stirring at room temperature for 4h, and drying at 120 ℃ to constant weight to obtain hydrated powder; and mixing 100 parts of hydrated powder and 1 part of aluminate coupling agent in a high-speed mixer for 10 minutes to obtain the activated portland cement clinker micropowder. And (3) mixing 10 parts of plasticized starch, 60 parts of LLDPE and 5 parts of maleic anhydride grafted polyethylene at a high speed for 10 minutes, and extruding and blowing a film to obtain the degradable plastic garbage bag.
The prepared plastic garbage bag is buried in the soil and is completely degraded after 359 days.
TABLE 1 degradation time statistics Table
| Plasticized starch | LLDPE | Maleic anhydride grafted polyethylene | Hydrated silicate cement clinker micropowder | Hydration time of agitation (hours) | Degradation time/(sky) | |
| Example 1 | 10 | 60 | 5 | 30 | 4 | 186 |
| Example 2 | 10 | 60 | 5 | 30 | 6 | 205 |
| Example 3 | 10 | 60 | 5 | 30 | 8 | 236 |
| Example 4 | 10 | 60 | 5 | 30 | 10 | 281 |
| Example 5 | 10 | 60 | 5 | 30 | 12 | 323 |
| Example 6 | 10 | 60 | 5 | 20 | 4 | 198 |
| Example 7 | 10 | 60 | 5 | 10 | 4 | 206 |
| Comparative examples | 10 | 60 | 5 | 0 | 4 | 359 |
As can be seen from the examples and the statistical results in Table 1, the degradation time is significantly shortened compared to the garbage bag without the portland cement clinker due to the addition of the portland cement clinker as a degradation agent. In addition, the perfection degree of the structures of calcium silicate hydrate and calcium aluminate obtained in the hydration process of the portland cement clinker is related to the hydration stirring time, the hydration stirring time of the portland cement clinker is controlled, the degradation time of the plastic garbage bag can be further controlled, and the purpose of controllable degradation is achieved.
In conclusion, the operation method is simple, and the prepared plastic garbage bag has high degradation effect and obvious ecological benefit and economic benefit.
Claims (9)
1. A preparation method of a controllable degradable plastic garbage bag is characterized in that the garbage bag is prepared from the following raw materials: the polyethylene, hydrated portland cement raw material, starch, compatilizer, plasticizer and coupling agent are melt blended, extruded and blown into a film, and the preparation method comprises the following steps:
step 1: plasticizing starch to obtain plasticized starch;
step 2: preparing and activating clinker powder of hydrated silicate cement;
and step 3: primary mixing of raw materials;
and 4, step 4: and (3) extruding and blowing the film by the primarily mixed raw materials.
2. The method for preparing a controlled degradation plastic garbage bag according to claim 1, wherein the step 1 is that starch is added into a high speed mixer, plasticizer is added, and the mixture is treated, kept stand and then cured;
step 2, burning the hydrated portland cement raw material until part of the hydrated portland cement raw material is molten to obtain portland cement clinker; grinding Portland cement clinker, adding water, stirring at room temperature, and drying to constant weight to obtain hydrated Portland cement clinker powder; putting the portland cement clinker powder into a high-speed mixer, stirring and heating, adding a coupling agent, continuously stirring to obtain activated portland cement clinker powder, and taking out;
the step 3 is as follows: mixing the plasticized starch, the activated portland cement clinker powder, the polyethylene and the compatilizer in a high-speed mixer;
the step 4 is as follows: and (3) adding the raw materials prepared in the previous steps into an extruder, and extruding and blowing a film to prepare the garbage bag.
3. The method for preparing the controllable degradable plastic garbage bag according to claim 2, wherein the garbage bag comprises the following components in parts by weight:
40-60 parts of polyethylene, 10-30 parts of hydrated portland cement clinker powder, 5-10 parts of starch, 1-5 parts of compatilizer, 1-3 parts of plasticizer and 0.1-0.5 part of coupling agent.
4. The method for preparing a controllable degradation plastic garbage bag according to claim 2, wherein the stirring time at room temperature in the step 2 is 4-12 hours.
5. The method of making a controlled degradation plastic garbage bag according to claim 1, wherein the starch is at least one of rice starch, corn starch, mung bean starch, lotus root starch and potato starch.
6. The method of claim 1, wherein the compatibilizer is one of polyethylene-grafted maleic anhydride, polyethylene-grafted oleic acid, POE-grafted maleic anhydride, and polyethylene wax-grafted maleic anhydride.
7. The method of claim 1, wherein the plasticizer is one of glycerin, low molecular weight polyvinyl alcohol and ethylene glycol.
8. The method of claim 1, wherein the coupling agent is one of an aluminate coupling agent or a titanate coupling agent.
9. A controlled degradation plastic garbage bag, which is prepared by the preparation method as claimed in claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010139086.1A CN111732780A (en) | 2020-03-03 | 2020-03-03 | Controllable degradable plastic garbage bag and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010139086.1A CN111732780A (en) | 2020-03-03 | 2020-03-03 | Controllable degradable plastic garbage bag and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111732780A true CN111732780A (en) | 2020-10-02 |
Family
ID=72646368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010139086.1A Pending CN111732780A (en) | 2020-03-03 | 2020-03-03 | Controllable degradable plastic garbage bag and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111732780A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102918097A (en) * | 2010-03-25 | 2013-02-06 | 罗盖特兄弟公司 | Plant material compositions and method for preparing same |
| US20180118925A1 (en) * | 2016-11-03 | 2018-05-03 | Weir Slurry Group, Inc. | Degradable rubber compositions |
| CN109651784A (en) * | 2018-12-17 | 2019-04-19 | 吉林中粮生化有限公司 | Fully biodegradable equipment for prepn. of yoghurt and preparation method thereof |
| CN110655686A (en) * | 2019-11-13 | 2020-01-07 | 浙江华发生态科技有限公司 | High-starch-content film blowing composite material and preparation method thereof |
-
2020
- 2020-03-03 CN CN202010139086.1A patent/CN111732780A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102918097A (en) * | 2010-03-25 | 2013-02-06 | 罗盖特兄弟公司 | Plant material compositions and method for preparing same |
| US20180118925A1 (en) * | 2016-11-03 | 2018-05-03 | Weir Slurry Group, Inc. | Degradable rubber compositions |
| CN109651784A (en) * | 2018-12-17 | 2019-04-19 | 吉林中粮生化有限公司 | Fully biodegradable equipment for prepn. of yoghurt and preparation method thereof |
| CN110655686A (en) * | 2019-11-13 | 2020-01-07 | 浙江华发生态科技有限公司 | High-starch-content film blowing composite material and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100374493C (en) | Flame-resistant plastic-wood composite materials and process for preparing same | |
| CN111548610B (en) | Biodegradable composite material capable of regulating degradation rate and preparation and application thereof | |
| CN111286168A (en) | Biodegradable polyester/cellulose composite blown film material and preparation method thereof | |
| CN109111710B (en) | Heat-resistant PLA-based degradable plastic bottle and preparation method thereof | |
| CN101781467A (en) | Biomass-synthetic plastic product and method for preparing same | |
| CN101851355A (en) | Degradable starch-based plastic masterbatch and preparation method thereof | |
| CN103865106A (en) | Biodegradable plastic with high starch content and preparation method of biodegradable plastic | |
| CN105504704A (en) | Ethanolamine activated Na-montmorillonite and polymer composite biodegradable film blowing resin and preparation method | |
| CN108003645A (en) | A kind of complete biodegradable stalk injection-moulded plastic and preparation method thereof | |
| CN108624020B (en) | Seawater degradation material with adjustable use period and degradation period and preparation method thereof | |
| CN106674923A (en) | Controllable-degradation PBAT/PLA (poly(butyleneadipate-co-terephthalate)/polylactic acid) composite film and preparation method thereof | |
| CN106479132B (en) | A kind of degradation of plastic film master batch and the preparation method and application thereof | |
| CN108239324A (en) | A kind of biology base stalk composite plastic and preparation method thereof | |
| CN112358708A (en) | Biodegradable film blowing modified material with high starch content and preparation method thereof | |
| CN108250696A (en) | A kind of cellulose complete biodegradable construct blow-molded and preparation method thereof | |
| CN112940389A (en) | Anaerobic degradation material and preparation method thereof | |
| CN107964215A (en) | A kind of safety and environmental protection degradation plastic material and preparation method thereof | |
| KR20060008863A (en) | Totally biodegradable plastic master batch and its preparation | |
| KR101542919B1 (en) | Eco-friendly composite polymer pellet having improved mechanical property, manufacturing method thereof, and fabric yarn using the same | |
| CN111647187B (en) | Degradable plastic packaging bag material and preparation method thereof | |
| CN101225222B (en) | Polylactic acid as well as derivative composite material and preparation method thereof | |
| CN112812518A (en) | Thermoplastic biodegradable plastic and preparation method thereof | |
| CN102617969B (en) | Preparation method of thermoplastic konjac glucomannan/poly butylenes succinate blending material | |
| CN111732780A (en) | Controllable degradable plastic garbage bag and preparation method thereof | |
| WO2018099227A1 (en) | Biological additive and plastic product for food packaging prepared by same |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201002 |