CN109320833A - A kind of degradable mulch and preparation method - Google Patents
A kind of degradable mulch and preparation method Download PDFInfo
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- CN109320833A CN109320833A CN201811298166.0A CN201811298166A CN109320833A CN 109320833 A CN109320833 A CN 109320833A CN 201811298166 A CN201811298166 A CN 201811298166A CN 109320833 A CN109320833 A CN 109320833A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
- C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G13/00—Protecting plants
- A01G13/02—Protective coverings for plants; Coverings for the ground; Devices for laying-out or removing coverings
- A01G13/0256—Ground coverings
- A01G13/0268—Mats or sheets, e.g. nets or fabrics
- A01G13/0275—Films
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F210/00—Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F210/16—Copolymers of ethene with alpha-alkenes, e.g. EP rubbers
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- 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
- C08K3/16—Halogen-containing compounds
- C08K2003/162—Calcium, strontium or barium halides, e.g. calcium, strontium or barium chloride
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- 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
Abstract
The invention discloses a kind of degradable mulch and preparation method thereof, according to the mass fraction, which includes following component: 100 parts of low density polyethylene (LDPE)s, 25 ~ 30 parts of starch, 30 ~ 40 parts of plasticizer, 8 ~ 12 parts of dispersing agents, 2 ~ 4 parts of light stabilizers, 2 ~ 4 parts of antioxidant and 5 ~ 8 parts of degradation agents；Thermal oxidative degradation agent includes metal-organic framework material UIO-66 and metal-organic framework material MOF-5；The molecular weight distributing index of low density polyethylene (LDPE) is 1.0 ~ 1.2, and the weight average molecular weight of low density polyethylene (LDPE) is 20000 ~ 22000；In thermal oxidative degradation agent, the mass ratio of metal-organic framework material UIO-66 and metal-organic framework material MOF-5 are 1:0.9 ~ 1.1, are had the advantages that degradable.
Description
Technical field
The present invention relates to a kind of degradable mulch and preparation methods.
Background technique
From Analysis of Environmental Problem, largely discarded plastic products are brought because of its non-biodegradable to environment for human survival
The puzzlement of " white pollution ".There are many method at present for " white garbages " such as disposal of plastic waste, such as burn, recycle, cover
It buries, but these treatment effects are all undesirable.If carrying out landfill disposal to discarded plastics, this processing method not only occupies soil
Ground, and since general-purpose plastics generally will can just degrade through the centuries, long-term hazards are caused to soil in this way, influence crops
Growth, leads to crop production reduction；If doing burning disposal, a large amount of toxic, pernicious gases can be generated, atmospheric environment are polluted, to draw
Play the secondary pollution of environment；In addition, the plastics being largely scattered be also easy to animal is caused to eat by mistake it is lethal；Agglomerating bundled plastics enter
Pipeline easily causes the plugging fault of water conservancy projects and urban facilities.If being recycled, 25% plastic garbage can be only handled,
In addition recovery technology falls behind, and processing cost is excessively high, and performance and the use value for recycling product is not high.China generates about 500 every year
Ten thousand tons of plastic garbage, and these waste plastics only have 30% or so by the spontaneous recycling of individual proprietor, are produced into different
Plastic products, remaining largely carries out sanitary landfills or arbitrarily stacks, and causes the waste of more than 50 hundred million yuan of resources of value and environment dirty
Dye.Serious pollution of ecological environment is the problem of plastic products are pendulum most existing in face of people, most serious.
Therefore, developing degradable mulch, there is certain production application to be worth.
Summary of the invention
The first object of the present invention is to provide a kind of degradable mulch, has the advantages that degradable.
Above-mentioned technical purpose of the invention has the technical scheme that
A kind of degradable mulch, according to the mass fraction, including following component: 100 parts of low density polyethylene (LDPE)s, 45~55 parts fill out
Material, 25~30 parts of starch, 8~12 parts of dispersing agents, 0.8~1.5 part of light stabilizer, 0.8~1.5 part of antioxidant and 5~8 parts of hot oxygen
Change degradation agent；
The molecular weight distributing index of the low density polyethylene (LDPE) is 1.0~1.2, the Weight-average molecular of the low density polyethylene (LDPE)
Amount is 20000~22000；
The thermal oxidative degradation agent includes metal-organic framework material UIO-66 and metal-organic framework material MOF-5；?
In the thermal oxidative degradation agent, the matter of the metal-organic framework material UIO-66 and the metal-organic framework material MOF-5
Amount is than being 1: 0.9~1.1.
By adopting the above technical scheme, when excitation energy is greater than its forbidden bandwidth, the thermal oxidative degradation agent of selection is just
Can generate electrons and holes, electrons and holes can its surface occur a series of redox reactions generate hydroxyl radical free radicals and
Hydroperoxides isoreactivity group, by film degradation at lower-molecular substance；It simultaneously can be by starch to the sucking action of microorganism
By the bacteria buildup in soil on film, microbial action and starch-splitting and lower-molecular substance, making film finally is soil
Earth assimilation；The application is using the organic framework materials UIO-66 and metal-organic framework material MOF-5 of special ratios as hot oxygen
Change degradation agent, is found surprisingly that the temperature of its stimulating activity is lower, palliating degradation degree is high, degradation rate is fast, unglazed as requested, even if
The preferable degradation that can also be played at low temperature, and it is mild to act on degradation in the scheme of the application, reduces outer energy consumption and promotees
Into degradation, there is preferable energy-saving effect.
Further preferably are as follows: the low density polyethylene (LDPE) is prepared by the following method: by V2O5, triethanolamine, hydrogen, nitrogen
Gas, ethylene and hexene are added in gas-phase reactor, and 2~4hr is reacted under 75~78 DEG C and 1.5~1.7MPa；
In gas-phase reactor, the partial pressure for controlling hydrogen is 34~36%, and the concentration of hydrogen is 250~350ppm；
The molar ratio of ethylene and hexene is 1: 0.028~0.031, ethylene, V2O5Mass ratio with triethanolamine is 100:
0.5~1.0: 2.5~3.5.
By adopting the above technical scheme, available molecular weight distributing index be 1.0~1.2 and weight average molecular weight be 20000~
22000 low density polyethylene (LDPE) overcomes technology prejudice (in the prior art with V2O5For catalyst obtain low density polyethylene (LDPE) be
Width distribution, profile exponent are generally 4~10).Using above-mentioned low density polyethylene (LDPE), it is more advantageous to the degradation of centralization, improves drop
Solve effect.
Further preferably are as follows: a kind of degradable mulch further includes 2~4 parts of nano-titanium dioxides；The nano-silica
Change titanium to be filled in the thermal oxidative degradation agent, the method for filling are as follows: nano-titanium dioxide is dissolved in n,N-Dimethylformamide
In, thermal oxidative degradation agent is added, mixes, 105~115 DEG C of temperature control to solvent volatilizes.
By adopting the above technical scheme, nano-titanium dioxide is preferable photodegradable aid, can accelerate the drop of film under light illumination
Solution；Nano-titanium dioxide is uniformly dispersed in thermal oxidative degradation agent, nano-titanium dioxide is filled in thermal oxidative degradation agent
On skeleton, active force is strong, and preferable degradation can be played by making the different zones on film and degradation is more balanced.
Further preferably are as follows: the filler includes calcium carbonate, volcano ashes and calcium chloride；In the filler, the carbon
The mass ratio of sour calcium, the volcano ashes and the calcium chloride is 1: 0.45~0.55: 0.05~0.08；
The dispersing agent includes mineral oil and PEO-PPO-PEO triblock copolymer；In the dispersing agent, the mineral
The quality of the oily and described PEO-PPO-PEO triblock copolymer is 1: 0.11~0.15；
The light stabilizer is 2- (2 '-hydroxyls -5 '-aminomethyl phenyl) benzotriazole；
The antioxidant is antioxidant 1010.
By adopting the above technical scheme, by the insulation effect of volcano ashes and calcium chloride, certain liter can be played to film
Temperature effect, improves its degradation effect.
The second object of the present invention is to provide a kind of preparation method of degradable mulch.
Above-mentioned technical purpose of the invention has the technical scheme that
A kind of preparation method of degradable mulch, comprising the following steps: by the low density polyethylene (LDPE), filler, shallow lake of formula ratio
Powder, dispersing agent, light stabilizer, antioxidant and thermal oxidative degradation agent are blended, and are heated to melting, then blend is coextruded.
Further preferably are as follows: the thermal oxidative degradation agent uses the thermal oxidative degradation agent filled with nano-titanium dioxide to substitute.
Further preferably are as follows: the following steps are included: by the low density polyethylene (LDPE) of formula ratio, filler, starch, dispersing agent, light
Stabilizer, antioxidant and thermal oxidative degradation agent are blended, and being heated to 105~115 DEG C makes its melting, keeps the temperature 1 at 105~115 DEG C
Ice-water bath is cooled to 20~30 DEG C after~3hr, is again heated to 95~105 DEG C and is coextruded blend.
By adopting the above technical scheme, its amorphous state is improved, specific surface area is increased, increases processing area, accelerates rate.
In conclusion the invention has the following advantages: all having higher degradation speed in having light or light protected environment
Rate and palliating degradation degree, degradation products are minimum to the pollution of environment, realize Green Sustainable.
Specific embodiment
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the protection scope of invention.
Embodiment 1a: low density polyethylene (LDPE) is prepared by the following method to obtain: by V2O5, triethanolamine, hydrogen, nitrogen
Gas, ethylene and hexene are added in gas-phase reactor, react 4hr under 75 DEG C and 1.7MPa；In gas-phase reactor, hydrogen is controlled
The partial pressure of gas is 34%, and the concentration of hydrogen is 250ppm；The molar ratio of ethylene and hexene is 1: 0.028, ethylene, V2O5With three
The mass ratio of ethanol amine is 100: 0.5: 2.5.
The measurement of molecular weight and molecular weight distribution use the measurement (mark that PL-GPC220 is solvent at 150 DEG C using trichloro-benzenes
Sample: PS, flow velocity: 1.0ml/min, pillar: 3xPlgel 10um M1xED-B 300x7.5nm).The molecule of low density polyethylene (LDPE)
Measuring profile exponent is 1.1, and the weight average molecular weight of low density polyethylene (LDPE) is 21500.
Embodiment 1b: low density polyethylene (LDPE) is prepared by the following method to obtain: by V2O5, triethanolamine, hydrogen, nitrogen
Gas, ethylene and hexene are added in gas-phase reactor, react 2hr under 78 DEG C and 1.5MPa；In gas-phase reactor, hydrogen is controlled
The partial pressure of gas is 36%, and the concentration of hydrogen is 350ppm；The molar ratio of ethylene and hexene is 1: 0.031, ethylene, V2O5With three
The mass ratio of ethanol amine is 100: 1.0: 3.5.
The measurement of molecular weight and molecular weight distribution use the measurement (mark that PL-GPC220 is solvent at 150 DEG C using trichloro-benzenes
Sample: PS, flow velocity: 1.0ml/min, pillar: 3xPlgel 10um M1xED-B 300x7.5nm).The molecule of low density polyethylene (LDPE)
Measuring profile exponent is 1.2, and the weight average molecular weight of low density polyethylene (LDPE) is 21800.
Embodiment 2: a kind of degradable mulch is prepared by the following method to obtain:
(1) nano-titanium dioxide is dissolved in n,N-Dimethylformamide, thermal oxidative degradation agent is added, mixed, temperature control 105
It DEG C is volatilized to solvent, obtains the thermal oxidative degradation agent filled with nano-titanium dioxide；
(2) by 100 parts of low density polyethylene (LDPE)s (deriving from embodiment 1a), 30 parts of calcium carbonate, 13.5 parts of volcano ashes, 1.5
Part calcium chloride (mass ratio of calcium carbonate, volcano ashes and calcium chloride is 1: 0.45: 0.05), 25 parts of starch, 7.2 parts of mineral oil,
0.8 part of PEO-PPO-PEO triblock copolymer (quality of mineral oil and PEO-PPO-PEO triblock copolymer is 1: 0.11),
0.8 part of 2- (2 '-hydroxyls -5 '-aminomethyl phenyl) benzotriazole (abbreviation UV-P), 0.8 part of antioxidant 1010 and 7.0 parts are filled with
(the thermal oxidative degradation agent filled with nano-titanium dioxide includes that 2.6 parts of metals are organic for the thermal oxidative degradation agent of nano-titanium dioxide
Frame material UIO-66,2.4 parts of metal-organic framework material MOF-5 and 2.0 parts of nano-titanium dioxides, metal-organic framework material
The mass ratio of UIO-66 and metal-organic framework material MOF-5 are 1: 0.9) being blended, being heated to 105 DEG C makes its melting, at 105 DEG C
Ice-water bath is cooled to 20 DEG C after lower heat preservation 3hr, is again heated to 95 DEG C and is coextruded blend.
Embodiment 3: a kind of degradable mulch is prepared by the following method to obtain:
(1) nano-titanium dioxide is dissolved in n,N-Dimethylformamide, thermal oxidative degradation agent is added, mixed, temperature control 110
It DEG C is volatilized to solvent, obtains the thermal oxidative degradation agent filled with nano-titanium dioxide；
(2) by 100 parts of low density polyethylene (LDPE)s (derive from embodiment 1a), 32.0 parts of calcium carbonate, 16.0 parts of volcano ashes,
1.9 parts of calcium chloride (mass ratio of calcium carbonate, volcano ashes and calcium chloride is 1: 0.50: 0.06), 28 parts of starch, 8.8 parts of mineral
Oil, 1.2 parts of PEO-PPO-PEO triblock copolymers (quality of mineral oil and PEO-PPO-PEO triblock copolymer is 1:
0.14), 1.2 parts of 2- (2 '-hydroxyls -5 '-aminomethyl phenyl) benzotriazole (abbreviation UV-P), 1.0 parts of antioxidant 1010s and 9.0 parts
(the thermal oxidative degradation agent filled with nano-titanium dioxide includes 3.0 parts of gold for thermal oxidative degradation agent filled with nano-titanium dioxide
Belonging to organic framework materials UIO-66,3.0 parts of metal-organic framework material MOF-5 and 3.0 parts of nano-titanium dioxides, metal has machine frame
The mass ratio of frame material UIO-66 and metal-organic framework material MOF-5 are 1: 1.0) it is blended, being heated to 110 DEG C makes its melting,
Ice-water bath is cooled to 25 DEG C after keeping the temperature 2hr at 110 DEG C, is again heated to 110 DEG C and is coextruded blend.
Embodiment 4: a kind of degradable mulch is prepared by the following method to obtain:
(1) nano-titanium dioxide is dissolved in n,N-Dimethylformamide, thermal oxidative degradation agent is added, mixed, temperature control 115
It DEG C is volatilized to solvent, obtains the thermal oxidative degradation agent filled with nano-titanium dioxide；
(2) by 100 parts of low density polyethylene (LDPE)s (derive from embodiment 1a), 33.7 parts of calcium carbonate, 18.6 parts of volcano ashes,
2.7 parts of calcium chloride (mass ratio of calcium carbonate, volcano ashes and calcium chloride is 1: 0.55: 0.08), 30 parts of starch, 10.4 parts of mineral
Oil, 1.6 parts of PEO-PPO-PEO triblock copolymers (quality of mineral oil and PEO-PPO-PEO triblock copolymer is 1:
0.15), 1.5 parts of 2- (2 '-hydroxyls -5 '-aminomethyl phenyl) benzotriazole (abbreviation UV-P), 1.5 parts of antioxidant 1010s and 12 parts
(the thermal oxidative degradation agent filled with nano-titanium dioxide includes 3.8 parts of gold for thermal oxidative degradation agent filled with nano-titanium dioxide
Belong to organic framework materials UIO-66,4.2 parts of metal-organic framework material MOF-5 and 4 parts of nano-titanium dioxides, metal organic frame
The mass ratio of material UIO-66 and metal-organic framework material MOF-5 are 1: 1.1) it is blended, being heated to 115 DEG C makes its melting,
Ice-water bath is cooled to 30 DEG C after keeping the temperature 1hr at 115 DEG C, is again heated to 105 DEG C and is coextruded blend.
Embodiment 5: a kind of degradable mulch, the difference with embodiment 3 be, the hot oxygen filled with nano-titanium dioxide
Change degradation agent and substitute (being not added with nano-titanium dioxide in system) with thermal oxidative degradation agent, i.e., it is prepared by the following method
It arrives:
By 100 parts of low density polyethylene (LDPE)s (deriving from embodiment 1b), 32.0 parts of calcium carbonate, 16.0 parts of volcano ashes, 1.9 parts
Calcium chloride (mass ratio of calcium carbonate, volcano ashes and calcium chloride is 1: 0.50: 0.06), 28 parts of starch, 8.8 parts of mineral oil, 1.2
Part PEO-PPO-PEO triblock copolymer (quality of mineral oil and PEO-PPO-PEO triblock copolymer is 1: 0.14), 1.2
Part 2- (2 '-hydroxyls -5 '-aminomethyl phenyl) benzotriazole (abbreviation UV-P), 1.0 parts of antioxidant 1010s, 3.0 parts of metals have machine frame
Frame material UIO-66 and 3.0 parts of metal-organic framework material MOF-5 (metal-organic framework material UIO-66 and metal organic frames
The mass ratio of material MOF-5 is 1: 1.0) being blended, being heated to 110 DEG C makes its melting, and ice-water bath is cold after keeping the temperature 2hr at 110 DEG C
But to 25 DEG C, 110 DEG C is again heated to and is coextruded blend.
Embodiment 6: a kind of degradable mulch, the difference with embodiment 3 are that filler is calcium carbonate；Dispersing agent is mine
Object oil；Light stabilizer is 2- (2 '-hydroxyls -3 ', 5 '-di-tert-butyl-phenyls) -5- chlorobenzotriazole (abbreviation UV-327, existing skill
The light stabilizer of polyethylene is exclusively used in art)；Antioxidant is antioxidant 1076.
Embodiment 7: a kind of degradable mulch, the difference from example 2 is that, the preparation method after different component blends
Difference, i.e., its be prepared by the following method to obtain:
(1) nano-titanium dioxide is dissolved in n,N-Dimethylformamide, thermal oxidative degradation agent is added, mixed, temperature control 105
It DEG C is volatilized to solvent, obtains the thermal oxidative degradation agent filled with nano-titanium dioxide；
(2) by 100 parts of low density polyethylene (LDPE)s (deriving from embodiment 1b), 30 parts of calcium carbonate, 13.5 parts of volcano ashes, 1.5
Part calcium chloride (mass ratio of calcium carbonate, volcano ashes and calcium chloride is 1: 0.45: 0.05), 25 parts of starch, 7.2 parts of mineral oil,
0.8 part of PEO-PPO-PEO triblock copolymer (quality of mineral oil and PEO-PPO-PEO triblock copolymer is 1: 0.11),
0.8 part of 2- (2 '-hydroxyls -5 '-aminomethyl phenyl) benzotriazole (abbreviation UV-P), 0.8 part of antioxidant 1010 and 7.0 parts are filled with
(the thermal oxidative degradation agent filled with nano-titanium dioxide includes that 2.6 parts of metals are organic for the thermal oxidative degradation agent of nano-titanium dioxide
Frame material UIO-66,2.4 parts of metal-organic framework material MOF-5 and 2.0 parts of nano-titanium dioxides, metal-organic framework material
The mass ratio of UIO-66 and metal-organic framework material MOF-5 are 1: 0.9) being blended, being heated to 105 DEG C makes its melting, will be blended
Object coextrusion.
Degradation property test
1, test sample: embodiment 2-7, reference substance 1-3.
Reference substance 1: Yi Zhongguang, microorganism co-degradation mulch are made referring to the number 5 of the embodiment one of CN1047678A
It is standby.Low density polyethylene (LDPE) raw material is purchased from oil of SPC, and weight average molecular weight is 30000~35000, molecular weight distributing index 1.9.
Reference substance 2: commercially available low density polyethylene (LDPE) (is purchased from oil of SPC, weight average molecular weight is 30000~35000, molecular weight
1.9) profile exponent is.
Reference substance 3: a kind of mulch, the difference from example 2 is that, low density polyethylene (LDPE) selection is commercially available, purchased from upper
Extra large petrochemical industry, weight average molecular weight are 30000~35000, molecular weight distributing index 1.9.
2, test content
It is tested using soil buries method, evaluation method may be selected to be indicated with percentage loss of weight Xi.Xi=(Wo-Wi) × 100%/
Wo, in formula, Xi indicates that the percentage loss of weight of sample, Wo indicate the quality (g) of sample before degrading, and Wi indicates sample after degradation i days
Quality (g).
Sample is cut into small pieces (3cm × 3cm), airtight bottle is placed on varying environment (environment by the soil compost in airtight bottle
Temperature, ambient light illumination are different) in, it taking out and weighs every a period of time, the sample of taking-up is washed with distilled water, and dehydrated alcohol, which is swung, to be washed,
It is weighed after drying to constant weight again.It parallel test 5 times, is averaged.
Test result is as shown in Table 1 and Table 2.Tables 1 and 2 is shown: (1) in same time point, reference substance 1 and embodiment 2-
7 percentage loss of weight under the conditions of having light is significantly greater than percentage loss of weight of the reference substance 2 under the conditions of having light；Illustrate compared to city
Sell low density polyethylene (LDPE), the palliating degradation degree of reference substance 1 and embodiment 2-7 are higher；(2) in same time point, embodiment 2-7 is being kept away
Percentage loss of weight under the conditions of light is significantly greater than percentage loss of weight of the reference substance 1 under the conditions of being protected from light；Illustrate compared to existing skill
The degradable membrane of art, palliating degradation degree of embodiment 2-7 under the conditions of being protected from light are higher；(3) no matter still having striation being protected from light condition
Under part, the percentage loss of weight fall off rate of embodiment 2-7 is significantly faster than that the percentage loss of weight fall off rate of reference substance 1, and implements
The percentage loss of weight minimum value of example 2-7 is significantly less than the percentage loss of weight minimum value of reference substance 1, illustrates the degradation of embodiment 2-7
Faster, most degradation degree is more thorough for efficiency；(4) at compared to 25 DEG C, palliating degradation degree of all samples at 4 DEG C and degradation speed
Rate is worse, but embodiment 2-7 is still able to maintain preferable palliating degradation degree and degradation rate, illustrates that the application is suitable for low temperature environment,
Environment of degrading is milder；(5) in same time point, the palliating degradation degree and degradation rate of reference substance 2 are significantly better than that reference substance 3；
Illustrate to use homemade low density polyethylene (LDPE) (molecular weight distributing index for 1.0~1.2, weight average molecular weight is 20000~22000)
More conducively degrade；(6) comprehensive degradation condition, degradation efficiency and most degradation degree, embodiment 2-4 are most preferred embodiment.
1 degradation property test result of table (illumination of ambient lighting is controlled in 5000 ± 500lx)
2 degradation property test result (light protected environment) of table
The specific implementation of the invention is not to be limited to these illustrations for the above content, and technology belonging to the present invention is led
For the those of ordinary skill in domain, without departing from the inventive concept of the premise, a number of simple deductions or replacements can also be made,
It all shall be regarded as belonging to present invention scope of patent protection determined by the appended claims.
Claims (7)
1. a kind of degradable mulch, which is characterized in that according to the mass fraction, including following component: 100 parts of low density polyethylene (LDPE)s,
45 ~ 55 parts of fillers, 25 ~ 30 parts of starch, 8 ~ 12 parts of dispersing agents, 0.8 ~ 1.5 part of light stabilizer, 0.8 ~ 1.5 part of antioxidant and 5 ~ 8 parts
Thermal oxidative degradation agent；
The molecular weight distributing index of the low density polyethylene (LDPE) is 1.0 ~ 1.2, and the weight average molecular weight of the low density polyethylene (LDPE) is
20000~22000；
The thermal oxidative degradation agent includes metal-organic framework material UIO-66 and metal-organic framework material MOF-5；Described
In thermal oxidative degradation agent, the mass ratio of the metal-organic framework material UIO-66 and the metal-organic framework material MOF-5
For 1:0.9 ~ 1.1.
2. a kind of degradable mulch according to claim 1, which is characterized in that the low density polyethylene (LDPE) passes through with lower section
Method preparation: by V2O5, triethanolamine, hydrogen, nitrogen, ethylene and hexene be added in gas-phase reactor, 75 ~ 78 DEG C and 1.5 ~
2 ~ 4hr is reacted under 1.7MPa；
In gas-phase reactor, the partial pressure for controlling hydrogen is 34 ~ 36%, and the concentration of hydrogen is 250 ~ 350ppm；
The molar ratio of ethylene and hexene is 1:0.028 ~ 0.031, ethylene, V2O5With the mass ratio of triethanolamine be 100:0.5 ~
1.0:2.5~3.5。
3. a kind of degradable mulch according to claim 2, which is characterized in that a kind of degradable mulch further includes 2 ~
4 parts of nano-titanium dioxides；The nano-titanium dioxide is filled in the thermal oxidative degradation agent, the method for filling are as follows: by nanometer
Titanium dioxide is dissolved in n,N-Dimethylformamide, and thermal oxidative degradation agent is added, and is mixed, and 105 ~ 115 DEG C of temperature control to solvent volatilizes.
4. a kind of degradable mulch according to claim 3, which is characterized in that the filler includes calcium carbonate, volcanic ash
Powder and calcium chloride；In the filler, the mass ratio of the calcium carbonate, the volcano ashes and the calcium chloride be 1:0.45 ~
0.55:0.05~0.08；
The dispersing agent includes mineral oil and PEO-PPO-PEO triblock copolymer；In the dispersing agent, the mineral oil and
The quality of the PEO-PPO-PEO triblock copolymer is 1:0.11 ~ 0.15；
The light stabilizer is 2- (2 '-hydroxyls -5 '-aminomethyl phenyl) benzotriazole；
The antioxidant is antioxidant 1010.
5. a kind of preparation method of degradable mulch, which comprises the following steps: by the low density polyethylene of formula ratio
Alkene, filler, starch, dispersing agent, light stabilizer, antioxidant and thermal oxidative degradation agent are blended, and are heated to melting, then blend is total to
It squeezes out.
6. a kind of preparation method of degradable mulch according to claim 5, which is characterized in that the thermal oxidative degradation agent
It is substituted with the thermal oxidative degradation agent filled with nano-titanium dioxide.
7. a kind of preparation method of degradable mulch according to claim 5 or 6, which comprises the following steps:
The low density polyethylene (LDPE) of formula ratio, filler, starch, dispersing agent, light stabilizer, antioxidant and thermal oxidative degradation agent are blended, added
Heat makes its melting to 105 ~ 115 DEG C, and ice-water bath is cooled to 20 ~ 30 DEG C after keeping the temperature 1 ~ 3hr at 105 ~ 115 DEG C, it is again heated to 95 ~
105 DEG C and blend is coextruded.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111499953A (en) * | 2020-05-12 | 2020-08-07 | 合肥佛斯德新材料科技有限公司 | Anti-ultraviolet heat-insulating film and manufacturing process thereof |
| CN113156812A (en) * | 2021-01-28 | 2021-07-23 | 淮阴工学院 | Fault detection method for secondary chemical reactor based on unknown input observer |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1418906A (en) * | 2002-11-28 | 2003-05-21 | 玉环县星光环卫薄膜厂 | Double degradation plastic film and production method thereof |
| CN103254490A (en) * | 2013-05-30 | 2013-08-21 | 河北麦森钛白粉有限公司 | Preparation process of double-degradation agricultural film |
| CN104031313A (en) * | 2014-06-27 | 2014-09-10 | 柳州市汉森机械制造有限公司 | Plastic mulching film |
| WO2015042641A1 (en) * | 2013-09-25 | 2015-04-02 | Douglas Michael Trenchard | An agricultural plastic mulch film and a composite thereof |
| CN105321719A (en) * | 2015-11-30 | 2016-02-10 | 福州大学 | Hierarchical mesoporous TiO2 prepared by taking MOF as precursor and application |
| CN106378190A (en) * | 2016-10-28 | 2017-02-08 | 盐城工学院 | Metal-organic framework material photosensitization titanium dioxide co-catalyst, and preparation method and application thereof |
| CN108499611A (en) * | 2018-03-26 | 2018-09-07 | 江苏奥净嘉环保科技有限公司 | A kind of preparation method of metal organic frame load nano-titanium dioxide photocatalysis agent |
-
2018
- 2018-11-02 CN CN201811298166.0A patent/CN109320833A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1418906A (en) * | 2002-11-28 | 2003-05-21 | 玉环县星光环卫薄膜厂 | Double degradation plastic film and production method thereof |
| CN103254490A (en) * | 2013-05-30 | 2013-08-21 | 河北麦森钛白粉有限公司 | Preparation process of double-degradation agricultural film |
| WO2015042641A1 (en) * | 2013-09-25 | 2015-04-02 | Douglas Michael Trenchard | An agricultural plastic mulch film and a composite thereof |
| CN104031313A (en) * | 2014-06-27 | 2014-09-10 | 柳州市汉森机械制造有限公司 | Plastic mulching film |
| CN105321719A (en) * | 2015-11-30 | 2016-02-10 | 福州大学 | Hierarchical mesoporous TiO2 prepared by taking MOF as precursor and application |
| CN106378190A (en) * | 2016-10-28 | 2017-02-08 | 盐城工学院 | Metal-organic framework material photosensitization titanium dioxide co-catalyst, and preparation method and application thereof |
| CN108499611A (en) * | 2018-03-26 | 2018-09-07 | 江苏奥净嘉环保科技有限公司 | A kind of preparation method of metal organic frame load nano-titanium dioxide photocatalysis agent |
Non-Patent Citations (1)
| Title |
|---|
| 王基铭 等主编: "《石油化工技术进展》", 30 April 2002, 中国石化出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111499953A (en) * | 2020-05-12 | 2020-08-07 | 合肥佛斯德新材料科技有限公司 | Anti-ultraviolet heat-insulating film and manufacturing process thereof |
| CN113156812A (en) * | 2021-01-28 | 2021-07-23 | 淮阴工学院 | Fault detection method for secondary chemical reactor based on unknown input observer |
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