CN106750766A - A kind of agricultural black polyethylene mulch film and preparation method thereof - Google Patents
A kind of agricultural black polyethylene mulch film and preparation method thereof Download PDFInfo
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- CN106750766A CN106750766A CN201611105198.5A CN201611105198A CN106750766A CN 106750766 A CN106750766 A CN 106750766A CN 201611105198 A CN201611105198 A CN 201611105198A CN 106750766 A CN106750766 A CN 106750766A
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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
- C08L23/06—Polyethene
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- 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
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- A01G13/0275—Films
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- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
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- C08J5/18—Manufacture of films or sheets
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- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—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
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Abstract
The present invention relates to agriculture field, a kind of agricultural black polyethylene mulch film and preparation method thereof is disclosed.The mulch film includes following components：The 85wt% of polyethylene 75, the 6wt% of black agglomerate 4, the 8wt% of polyvinyl alcohol 4, the 8wt% of multifunctional mother granules 4, the 2.5wt% of lubricant 0.5, the 1.5wt% of doped nano titanium dioxide 0.5, silane coupler 0.25 0.75%.The mulch film be in black, can lucifuge so that weeds cannot carry out photosynthesis and cannot survive.Multifunctional mother granules have water conservation, oxygenation, insecticidal function.Also there is slow release effect further for chemical enhancement agent, insecticidal constituent, can continue, stably discharge active component.Doped nano titanium dioxide has photocatalytic, can slowly make Plastic-film disintegration.Preparation method of the invention is simple, reasonable, is suitable to large-scale production.
Description
Technical field
The present invention relates to agriculture field, more particularly to a kind of agricultural black polyethylene mulch film and preparation method thereof.
Background technology
When kind of plant is in plantlet stage, in rapid growth stage, its root system perfects not enough, therefore for soil
The plunder ability of middle nutrient is not strong enough, generally requires applying herbicide.Herbicide refers to that weeds can be made thoroughly or selectively to send out
The withered medicament of life, also known as herbicide, is used to eliminate or suppress a class material of plant growth.Conventional kind is organic compound
Thing, can be widely used for the ground such as preventing and treating farmland, orchard, floral nursery, grassland and bare place, railway line, river course, reservoir, warehouse miscellaneous
The noxious plants such as grass, miscellaneous filling, miscellaneous tree.Although but herbicide is more or less gone back with certain selectivity for seedling
It is with negative effect.
Additionally, the growth of seedling root is especially fast.The quick substantial amounts of water of growth needs root absorption and nutrient, and absorb
Water and nutrient rely primarily on root and carry out a large amount of respirations to provide energy.Therefore the breathing in order to strengthen seedling root is made
With, it is necessary to often loosen the soil, keeping soil fluffy, increase oxygen content.But simultaneously because seedling is more fragile, it usually needs covering
Mulch film is soil is incubated, water conservation.Consequently, it is possible to just cannot easily carry out manually loosening the soil after covering with plastic film.
The oxygenation agent that can discharge oxygen is embedded in soil for this people have developed.Chinese invention such as Publication No. CN1319575A is special
Profit discloses a kind of method for improving phosphobacteria yield of biological fertilizer.In the fluid nutrient medium fermented for phosphobacteria, except containing
Have outside carbon source, nitrogen source, inorganic salts, also added with oxygenation agent, to oxygen when the method can in time supplement thalline in exponential phase
The wilderness demand of gas, improves the utilization rate of nutrient source, and the product of maximum harvest yield is obtained from the unit base for being consumed, and improves
The speed and quantity of thalline Reproduction, compared with traditional fermentation methods, can improve 1-5 times of phosphobacteria yield, and reduction is produced into
This, increases fertilizer efficiency.But the effect of its oxygenation agent is for bacterial respiratory provides oxygen, rather than being plant root, therefore oxygen evolution
Amount and release timeliness are not applied to for nursery stock.Also, the easily just a large amount of releases in the early stage of above-mentioned oxygenation agent, do not possess
The slow release effect of stabilization, causes oxygenation timeliness short.
On the other hand, existing mulch film is generally the plastic film for being difficult to degrade, not enough environmental protection, and recovery is wasted time and energy, no
It is enough convenient.And the existing universal water conservation of plastic film, venting capability are poor.
The content of the invention
Black polyethylene mulch film is used it is an object of the invention to provide a kind of agricultural.Mulch film of the invention contains black masterbatch
Grain, multifunctional mother granules and doped nano titanium dioxide；The mulch film be in black, can lucifuge so that weeds cannot enter
Row photosynthesis and cannot survive.Multifunctional mother granules have water conservation, oxygenation, insecticidal function.Further for chemical enhancement agent, desinsection
Composition also has slow release effect, can continue, stably discharge active component.Doped nano titanium dioxide has photocatalysis
Property, can slowly make Plastic-film disintegration.
Another object of the present invention is to provide a kind of preparation method of agricultural black polyethylene mulch film.System of the invention
Preparation Method is simple, reasonable, is suitable to large-scale production.
Concrete technical scheme of the invention is：A kind of agricultural uses black polyethylene mulch film, and its raw material includes following components：
Polyethylene 75-85wt%,
Black agglomerate 4-6wt%,
Polyvinyl alcohol 4-8wt%,
Multifunctional mother granules 4-8wt%,
Lubricant 0.5-2.5wt%,
Doped nano titanium dioxide 0.5-1.5wt%,
Silane coupler 0.25-0.75%.
Contain black agglomerate in mulch film of the invention so that mulch film be in black, black can shading, mulch film laying after, make
The weeding obtained in soil cannot carry out photosynthesis, so as to cannot survive.Herbicide need not be contained in black mulch film of the invention,
Also weeding purpose can be reached.The step of also eliminating artificial film of first turning up the soil simultaneously, then spray herbicide.
Contain doped nano titanium dioxide in mulch film of the invention, the particle size of nano titanium oxide is small, specific surface
Product is big, surface can be high, therefore it has powerful redox ability, under the action of uv light in nano titanium oxide valence band
Electronics (e-) being easy to be excited transits to conduction band, and corresponding hole (h+), subsequent h+ and e are produced in valence band-Exist with absorption
Water, oxygen molecule on nano titanium oxide surface are had an effect, and generate OH-、O2-、OOH-Deng the height with extremely strong oxidation
Active group's free radical, the oxidisability of these free radicals is very high, can be reacted with C, H chain of polyethylene, so that mulch film
Polyethylene degradation.The energy gap of nano titanium oxide is 3.2eV, therefore only ultraviolet of the wavelength less than 387nm could swash
Send out its catalysis activity.Ultraviolet light in sunshine is insufficient, therefore to the units such as N, P, K, Fe, Ca of being adulterated in nano titanium oxide
Element, further strengthens the utilization to visible ray in sunshine, so as to excite photocatalytic activity, improves dropping for mulch film
Xie Xing.Because mulch film can gradually photocatalytic degradation, therefore for a long time after some capillary channels occur in mulch film such that it is able to
Improve the gas permeability of mulch film.
Also contain multifunctional mother granules in mulch film of the invention, with water conservation, oxygenation, insecticidal function.Because seedling root needs
Substantial amounts of oxygen is wanted, and needs to carry out desinsection；Oxygenation agent, insecticidal constituent in load in mulch film, being capable of sustained release oxygen, desinsection
Composition, is loosened the soil without periodically opening mulch film, and spraying insecticide.
The addition of polyvinyl alcohol can improve the water holding capacity of mulch film.
Preferably, the preparation method of the black agglomerate is：By carbon powder or activated carbon powder elder generation and its 0.5-1.5 times of quality
Silane coupler blending, after being then added to be blended in polyethylene, polypropylene or polyester, made by screw extruder
Grain, obtains black agglomerate；Wherein carbon powder or activated carbon powder account for the 20-30wt% of black agglomerate.
Preferably, the doped nano titanium dioxide is the nanometer doped with least one of N, P, K, Fe, Ca element
Titanium dioxide.
Preferably, the doping of the doped nano titanium dioxide is 1-3wt%.
Element doping amount needs strict setting, can cause degradation speed too fast too much, causes mulch film physical strength early stage tight
Decline again, then degradation speed is excessively slow very little.
Preferably, the lubricant is at least in calcium stearate, OPE, paraffin, tristerin
Kind.Lubricant be conducive to material mixing and improve mulch film blow-molding process in flatness.
Preferably, the silane coupler is the one kind in KH550, KH560, KH570.Silane coupler can improve nothing
Machine thing dispersiveness in organic medium.
Preferably, the multifunctional mother granules include release layer, slow release layer and coating layer successively from the inside to the outside；The release layer
By following material composition：Chemical enhancement agent 20-30wt%, insecticidal constituent 10-20wt%, plural gel carrier 48-58wt%, change
Property calcium oxide 4-6wt%, adhesive 1-3wt%；The slow release layer is by following material composition：Chemical enhancement agent 20-30wt%, kill
Worm composition 10-20wt%, cyclodextrin 53-63wt%, adhesive 1-3wt%；The coating layer is alcohol-soluble macromolecule resin.
It is various containing insecticide, oxygenation agent and fertilizer type with slow-release function in the market.But, it is most
Slow-released carrier slow release effect is not ideal enough, easily causes that early stage is prominent to be released after being absorbed water particularly in the soil, functional active components quilt
Rapid dissolving release, causes to be sustained persistence degradation.And the functional active components of core part are located at, but because moisture oozes
Penetrate into slower into the speed of core, and functional active components need to penetrate through the part of outer layer, functional active components release
It is short of power, causes the effect in later stage to be much worse than early stage.
Multifunctional mother granules of the invention have three-decker.Wherein, coating layer is alcohol-soluble macromolecule resin, and alcohol-soluble is high
Molecule resin can infiltrate into soil to the moisture in soil into multifunctional mother granules inside and multifunctional mother granules inner material
In carry out a certain degree of obstruct, play slow releasing function, the carrier of slow release layer is cyclodextrin.Cyclodextrin inner has hydrophobic sky
Chamber, can play certain retarding action to the infiltration of moisture.The cooperation of coating layer and cyclodextrin, after fertilising, moisture penetration
Into inside multifunctional mother granules, simultaneously slow mechanism dissolved is diffused into outside coating layer for multifunctional mother granules water swelling, is continuously discharged
Functional active components, so as to reduce the loss of functional active components, play slow releasing function.Due to both cooperations so that function
Active component will not be released rapidly after early stage meets water, and sustained release rate is more stable, and sustained release persistence is stronger.The load of release layer
Body is plural gel carrier, and plural gel carrier has been also loaded modified oxidized calcium.Modified oxidized calcium can be put after meeting water
Thermal response, these heats can accelerate the dissolving of nutrient, functional active components in water, so that for the release of functional active components is carried
For power, the defect for overcoming later stage functional active components releasing effect poor.
Additionally, multifunctional mother granules of the invention are from things with preferable moisture absorption, water retention property such as plural gel, cyclodextrin
, used as carrier, it is in addition to as carrier function for matter, additionally it is possible to increase the retaining water holding capacity of mulch film.
Preferably, the mass ratio of the release layer, slow release layer and coating layer is 1:2-4:0.3-0.5.
Preferably, the chemical enhancement agent is at least one in calper calcium peroxide, urea peroxide and SODIUM PERCARBONATE；It is described to kill
Worm composition is at least one in MTI-446, clothianidin, thiacloprid, imidacloprid；Described adhesive is PVP；General bonding
Agent is dissolved in water and uses.Due to the present invention, functional active components should not meet water in preparation process, and PVP is dissolved in ethanol, because
This is more suitable selection as adhesive.The cyclodextrin is alpha-cyclodextrin, beta-schardinger dextrin or gamma-cyclodextrin；The alcohol
Soluble macromolecular resin is alcohol-soluble polyurethane or alcohol soluble polyacrylate.Alcohol-soluble polyurethane or alcohol soluble polyacrylate
With preferable film forming, and alcoholic solution dissolved in due to it, greatly reduce the consumption in preparation process reclaimed water, can
Prevent a large amount of losses of the functional active components in preparation process.
The dispersiveness except grass particle in the carrier under above-mentioned granularity is preferable.
Preferably, the preparation method of the plural gel carrier is：Take marine alga chopping and put into 50-100 times of quality
Water in, heat 20-30min at 95-105 DEG C；The concentration that marine alga is transferred to its 5-15 times of quality after filtering is 3-5wt%
Sodium pyrophosphate solution in, soak 0.5-1.5h at 50-60 DEG C, obtain viscous liquid；Viscous liquid is concentrated into solid
Content is 45-55wt%, to the polyvinyl alcohol that its 0.5-1 times of quality is added in viscous liquid and is stirred；Then in 40-
It is incubated at 50 DEG C, the sodium acid carbonate of adding liquid gross mass 1-3%, stirring reaction 10-20min adjusts liquid pH value after reaction
To neutral, plural gel carrier is finally dried to obtain.
Plural gel carrier of the invention, can be obtained, mainly with marine algae extract and polyvinyl alcohol using the above method
It is main carriers.Seaweed extracted liquor after polyvinyl alcohol, adds sodium acid carbonate in thick, sodium acid carbonate just with sea
Acidic materials in algae extract solution react, and generate carbon dioxide, and gas is obtained substantial amounts of pore in coagulant liquid
Road, can not only improve the load capacity of carrier, and quick leading to is provided in soil to be discharged into after functional active components dissolving
Road, reduces the resistance of infiltration.And plural gel carrier have very strong hygroscopicity, the later stage can speed up functional activity into
The rate of dissolution for dividing, the defect for further overcoming later stage functional active components releasing effect poor.
Preferably, the preparation method of the modified oxidized calcium is：By calcium oxide and potassium hydroxide in mass ratio 100:0.1-
0.2 is well mixed added in reaction vessel, by quality for the oxirane of calcium oxide 4-8wt% it is pressurized liquefied after be passed through reaction
In container, reaction vessel is heated to 140-160 DEG C, stirring reaction 2-3h under inert gas pressurization protection；After reaction terminates
Room temperature is cooled to, modified oxidized calcium is obtained.
In the preparation process of modified oxidized calcium, using potassium hydroxide and calcium oxide as common catalyst, make epoxy second
Alkane is polymerized on calcium oxide surface, generation PEO layer, and the effect of PEO layer is：Because calcium oxide meets water
Reaction more acutely, may result in temperature too high and cause potential safety hazard.After PEO is coated on calcium oxide surface,
Because PEO has preferable water imbibition, moisture needs slowly penetrate into calcium oxide table after first passing through its absorption
Face, serves cushioning effect.
Preferably, above-mentioned multifunctional mother granules are prepared as：
Step 1：Adhesive is dissolved with absolute ethyl alcohol；Simultaneously by chemical enhancement agent, insecticidal constituent, except grass particle, compound
Gel carrier, modified oxidized calcium mixing and stirring, then use adhesive bonding；Granulation is sequentially passed through after bonding, is dried and is sieved
Choosing, is obtained release layer.
Step 2：Cyclodextrin is mixed with the water of its 0.4-0.8 times of quality, after stirring in the pasty state, chemical enhancement is added successively
Agent, insecticidal constituent, except grass particle and it is uniformly dispersed, drying immediately after is not more than 5wt% to moisture content, obtains pastel；Will
Pastel is bonded after being well mixed with release layer, granulation is sequentially passed through after bonding, is dried and is screened, and slow release layer is obtained.
Step 3：Alcohol-soluble macromolecule resin is dissolved with ethanol, by alcohol-soluble macromolecule resin coating to being sustained layer surface,
Coating layer is formed after drying, multifunctional mother granules are obtained.
Preparation method of the present invention avoids chemical enhancement agent, insecticidal constituent, herbicidal constituents and water as far as possible in preparation process
Contact, obtained multifunctional mother granules quality is high, stabilization.
A kind of agricultural preparation method of black polyethylene mulch film, step is：
Step 1：Doped nano titanium dioxide is added in silane coupler and is well mixed；
Step 2：By the material of step 1 and black agglomerate, multifunctional mother granules, lubricant, polyvinyl alcohol and polyethylene blend
Afterwards, granulated by screw extruder；
Step 3：Material after granulation is obtained mulch film by inflation film manufacturing machine.
The beneficial effects of the invention are as follows：Mulch film of the invention contains black agglomerate, multifunctional mother granules and doped nano
Titanium dioxide；The mulch film be in black, can lucifuge so that weeds cannot carry out photosynthesis and cannot survive, reach not
Using herbicide also can weeding purpose.Multifunctional mother granules have water conservation, oxygenation, insecticidal function.Further for chemical enhancement agent,
Insecticidal constituent also has slow release effect, can continue, stably discharge active component.There is doped nano titanium dioxide light to urge
The property changed, can slowly make Plastic-film disintegration.Preparation method of the invention is simple, reasonable, is suitable to large-scale production.
Specific embodiment
With reference to embodiment, the invention will be further described.
Embodiment 1
A kind of agricultural uses black polyethylene mulch film, and its raw material includes following components：
Polyethylene 75wt%,
Black agglomerate 5wt%
Polyvinyl alcohol 6wt%,
Multifunctional mother granules 6wt%,
Lubricant (calcium stearate) 1.5wt%,
Doped nano titanium dioxide (being N, P, K of 2wt% doped with total doping) 1wt%,
Silane coupler (KH550) 0.5%.
Wherein, the multifunctional mother granules include release layer, slow release layer and coating layer successively from the inside to the outside；The release layer by
Following material composition：Chemical enhancement agent (calper calcium peroxide) 25wt%, insecticidal constituent (MTI-446) 15wt%, plural gel carrier
53wt%, modified oxidized calcium 5wt%, PVP 2wt%；The slow release layer is by following material composition：Chemical enhancement agent (peroxidating
Calcium) 25wt%, insecticidal constituent (MTI-446) 15wt%, alpha-cyclodextrin 58wt%, PVP 2wt%；The coating layer is that alcohol is molten
Property polyacrylate.
The mass ratio of the release layer, slow release layer and coating layer is 1:3:0.4.
Embodiment 2
A kind of agricultural uses black polyethylene mulch film, and its raw material includes following components：
Polyethylene 75wt%,
Black agglomerate 5wt%,
Polyvinyl alcohol 8wt%,
Multifunctional mother granules 8wt%,
Lubricant (OPE, paraffin) 1.75wt%,
Doped nano titanium dioxide (being Fe, Ca of 1wt% doped with total doping) 1.5wt%,
Silane coupler (KH560) 0.75%.
Wherein, the multifunctional mother granules include release layer, slow release layer and coating layer successively from the inside to the outside；The release layer by
Following material composition：Chemical enhancement agent (urea peroxide) 20wt%, insecticidal constituent (clothianidin) 20wt%, plural gel carrier
55wt%, modified oxidized calcium 4wt%, PVP 1wt%；The slow release layer is by following material composition：Chemical enhancement agent (peroxidating
Urea) 20wt%, insecticidal constituent (clothianidin) 20wt%, beta-schardinger dextrin 59wt%, PVP 1wt%；The coating layer is that alcohol is molten
Property polyacrylate.
The mass ratio of the release layer, slow release layer and coating layer is 1:2:0.3.
Embodiment 3
A kind of agricultural uses black polyethylene mulch film, and its raw material includes following components：
Polyethylene 85wt%,
Black agglomerate 5wt%,
Polyvinyl alcohol 4wt%,
Multifunctional mother granules 4wt%,
Lubricant (tristerin) 1.25wt%,
Doped nano titanium dioxide (being N, Fe, Ca of 3wt% doped with total doping) 0.5wt%,
Silane coupler (KH570) 0.25%.
Wherein, the multifunctional mother granules include release layer, slow release layer and coating layer successively from the inside to the outside；The release layer by
Following material composition：It is chemical enhancement agent (SODIUM PERCARBONATE) 30wt%, insecticidal constituent (thiacloprid, imidacloprid) 10wt%, compound solidifying
Glue carrier 51wt%, modified oxidized calcium 6wt%, PVP 3wt%；The slow release layer is by following material composition：Chemical enhancement agent
(SODIUM PERCARBONATE) 30wt%, insecticidal constituent (thiacloprid, imidacloprid) 10wt%, gamma-cyclodextrin 57wt%, PVP 3wt%；Institute
Coating layer is stated for alcohol soluble polyacrylate.
The mass ratio of the release layer, slow release layer and coating layer is 1:4:0.5.
Embodiment 4
The preparation method of the agricultural black polyethylene mulch film of embodiment 1 is：
It is prefabricated standby：
The preparation of black agglomerate：Carbon powder is first blended with the silane coupler of its 1 times of quality, is then added to gather
After being blended in ethene, granulated by screw extruder, obtain black agglomerate；Wherein carbon powder accounts for the 25wt% of black agglomerate.
The preparation of plural gel carrier：In taking marine alga chopping and put into 75 times of water of quality, the heating at 100 DEG C
25min；Marine alga is transferred in the sodium pyrophosphate solution that its 10 times of concentration of quality are 4wt% after filtering, is soaked at 55 DEG C
1h, obtains viscous liquid；Viscous liquid is concentrated into solid content for 50wt%, to adding its 0.75 times in viscous liquid
The polyvinyl alcohol of quality simultaneously stirs；Then it is incubated at 45 DEG C, the sodium acid carbonate of adding liquid gross mass 2%, stirring is anti-
15min is answered, liquid pH value is adjusted after reaction to neutrality, be finally dried to obtain plural gel carrier.
The preparation of modified oxidized calcium：By calcium oxide and potassium hydroxide in mass ratio 100:0.15 mixes added in reaction vessel
Close uniform, by quality for the oxirane of calcium oxide 6wt% it is pressurized liquefied after be passed through in reaction vessel, pressurizeed in inert gas and protected
Reaction vessel is heated to 150 DEG C, stirring reaction 2.5h under shield；Reaction is cooled to room temperature after terminating, and obtains modified oxidized calcium.
The preparation of multifunctional mother granules：
Step 1：Adhesive is dissolved with absolute ethyl alcohol；Simultaneously by chemical enhancement agent, insecticidal constituent, except grass particle, compound
Gel carrier, modified oxidized calcium mixing and stirring, then use adhesive bonding；Granulation is sequentially passed through after bonding, is dried and is sieved
Choosing, is obtained release layer.
Step 2：Cyclodextrin is mixed with the water of its 0.6 times of quality, after stirring in the pasty state, add successively chemical enhancement agent,
Insecticidal constituent, except grass particle and it is uniformly dispersed, drying immediately after is not more than 5wt% to moisture content, obtains pastel；By pasty state
Thing is bonded after being well mixed with release layer, granulation is sequentially passed through after bonding, is dried and is screened, and slow release layer is obtained.
Step 3：Alcohol-soluble macromolecule resin is dissolved with ethanol, by alcohol-soluble macromolecule resin coating to being sustained layer surface,
Coating layer is formed after drying, it is the multifunctional mother granules of 600-800 mesh that granularity is obtained.
The preparation of mulch film：
Step 1：Doped nano titanium dioxide is added in silane coupler and is well mixed；
Step 2：By the material of step 1 and black agglomerate, multifunctional mother granules, lubricant, polyvinyl alcohol and polyethylene blend
Afterwards, granulated by screw extruder；
Step 3：Material after granulation is obtained mulch film by inflation film manufacturing machine.
Embodiment 5
The preparation method of the agricultural black polyethylene mulch film of embodiment 2 is：
It is prefabricated standby：
The preparation of black agglomerate：Activated carbon powder is first blended with the silane coupler of its 0.5 times of quality, is then together added
After being blended in polypropylene, granulated by screw extruder, obtain black agglomerate；Wherein activated carbon powder accounts for black agglomerate
20wt%.
The preparation of plural gel carrier：In taking marine alga chopping and put into 50 times of water of quality, the heating at 95 DEG C
30min；Marine alga is transferred in the sodium pyrophosphate solution that the concentration of its 5-15 times of quality is 3wt% after filtering, is soaked at 50 DEG C
Bubble 1.5h, obtains viscous liquid；Viscous liquid is concentrated into solid content for 45wt%, to adding it in viscous liquid
0.5 times of polyvinyl alcohol of quality simultaneously stirs；Then it is incubated at 40 DEG C, the sodium acid carbonate of adding liquid gross mass 1% is stirred
Reaction 10min is mixed, liquid pH value is adjusted after reaction to neutrality, be finally dried to obtain plural gel carrier.
The preparation of modified oxidized calcium：By calcium oxide and potassium hydroxide in mass ratio 100:0.1 mixes added in reaction vessel
Close uniform, by quality for the oxirane of calcium oxide 4wt% it is pressurized liquefied after be passed through in reaction vessel, pressurizeed in inert gas and protected
Reaction vessel is heated to 1400 DEG C, stirring reaction 3h under shield；Reaction is cooled to room temperature after terminating, and obtains modified oxidized calcium.
The preparation of multifunctional mother granules：
Step 1：Adhesive is dissolved with absolute ethyl alcohol；Simultaneously by chemical enhancement agent, insecticidal constituent, except grass particle, compound
Gel carrier, modified oxidized calcium mixing and stirring, then use adhesive bonding；Granulation is sequentially passed through after bonding, is dried and is sieved
Choosing, is obtained release layer.
Step 2：Cyclodextrin is mixed with the water of its 0.4 times of quality, after stirring in the pasty state, add successively chemical enhancement agent,
Insecticidal constituent, except grass particle and it is uniformly dispersed, drying immediately after is not more than 5wt% to moisture content, obtains pastel；By pasty state
Thing is bonded after being well mixed with release layer, granulation is sequentially passed through after bonding, is dried and is screened, and slow release layer is obtained.
Step 3：Alcohol-soluble macromolecule resin is dissolved with ethanol, by alcohol-soluble macromolecule resin coating to being sustained layer surface,
Coating layer is formed after drying, it is the multifunctional mother granules of 600-800 mesh that granularity is obtained.
The preparation of mulch film：
Step 1：Doped nano titanium dioxide is added in silane coupler and is well mixed；
Step 2：By the material of step 1 and black agglomerate, multifunctional mother granules, lubricant, polyvinyl alcohol and polyethylene blend
Afterwards, granulated by screw extruder；
Step 3：Material after granulation is obtained mulch film by inflation film manufacturing machine.
Embodiment 6
The preparation method of the agricultural black polyethylene mulch film of embodiment 3 is：
It is prefabricated standby：
The preparation of black agglomerate：Carbon powder is first blended with the silane coupler of its 1.5 times of quality, is then added to
After being blended in polyester, granulated by screw extruder, obtain black agglomerate；Wherein carbon powder accounts for the 30wt% of black agglomerate.
The preparation of plural gel carrier：In taking marine alga chopping and put into 100 times of water of quality, the heating at 105 DEG C
20min；Marine alga is transferred in the sodium pyrophosphate solution that its 15 times of concentration of quality are 5wt% after filtering, is soaked at 60 DEG C
0.5h, obtains viscous liquid；Viscous liquid is concentrated into solid content for 55wt%, to adding its 1 times in viscous liquid
The polyvinyl alcohol of quality simultaneously stirs；Then it is incubated at 50 DEG C, the sodium acid carbonate of adding liquid gross mass 3%, stirring is anti-
20min is answered, liquid pH value is adjusted after reaction to neutrality, be finally dried to obtain plural gel carrier.
The preparation of modified oxidized calcium：By calcium oxide and potassium hydroxide in mass ratio 100:0.2 mixes added in reaction vessel
Close uniform, by quality for the oxirane of calcium oxide 8wt% it is pressurized liquefied after be passed through in reaction vessel, pressurizeed in inert gas and protected
Reaction vessel is heated to 160 DEG C, stirring reaction 2h under shield；Reaction is cooled to room temperature after terminating, and obtains modified oxidized calcium.
The preparation of multifunctional mother granules：
Step 1：Adhesive is dissolved with absolute ethyl alcohol；Simultaneously by chemical enhancement agent, insecticidal constituent, except grass particle, compound
Gel carrier, modified oxidized calcium mixing and stirring, then use adhesive bonding；Granulation is sequentially passed through after bonding, is dried and is sieved
Choosing, is obtained release layer.
Step 2：Cyclodextrin is mixed with the water of its 0.8 times of quality, after stirring in the pasty state, add successively chemical enhancement agent,
Insecticidal constituent, except grass particle and it is uniformly dispersed, drying immediately after is not more than 5wt% to moisture content, obtains pastel；By pasty state
Thing is bonded after being well mixed with release layer, granulation is sequentially passed through after bonding, is dried and is screened, and slow release layer is obtained.
Step 3：Alcohol-soluble macromolecule resin is dissolved with ethanol, by alcohol-soluble macromolecule resin coating to being sustained layer surface,
Coating layer is formed after drying, it is the multifunctional mother granules of 600-800 mesh that granularity is obtained.
The preparation of mulch film：
Step 1：Doped nano titanium dioxide is added in silane coupler and is well mixed；
Step 2：By the material of step 1 and black agglomerate, multifunctional mother granules, lubricant, polyvinyl alcohol and polyethylene blend
Afterwards, granulated by screw extruder；
Step 3：Material after granulation is obtained mulch film by inflation film manufacturing machine.
Obtained agricultural of the invention uses black polyethylene mulch film, and its is degradable for the powdery cycle is 70-90 days；Its activity
Slowly released component timeliness is 15-20 days.
It is raw materials used in the present invention, unless otherwise noted, it is the conventional raw material of this area；Method therefor in the present invention,
Unless otherwise noted, it is the conventional method of this area.
Claims (10)
1. a kind of agricultural uses black polyethylene mulch film, it is characterized in that：Its raw material includes following components：
Polyethylene 75-85wt%,
Black agglomerate 4-6wt%,
Polyvinyl alcohol 4-8wt%,
Multifunctional mother granules 4-8wt%,
Lubricant 0.5-2.5wt%,
Doped nano titanium dioxide 0.5-1.5wt%,
Silane coupler 0.25-0.75%.
2. a kind of agricultural according to claim 1 uses black polyethylene mulch film, it is characterized in that：The preparation of the black agglomerate
Method is：Carbon powder or activated carbon powder are first blended with the silane coupler of its 0.5-1.5 times of quality, are then added to gather
After being blended in ethene, polypropylene or polyester, granulated by screw extruder, obtain black agglomerate；Wherein carbon powder or activated carbon
Powder accounts for the 20-30wt% of black agglomerate.
3. a kind of agricultural according to claim 1 uses black polyethylene mulch film, it is characterized in that：The doped nano dioxy
It is the nano titanium oxide doped with least one of N, P, K, Fe, Ca element to change titanium.
4. a kind of agricultural according to claim 3 uses black polyethylene mulch film, it is characterized in that：The doped nano dioxy
The doping for changing titanium is 1-3wt%.
5. a kind of agricultural according to claim 1 uses black polyethylene mulch film, it is characterized in that：The lubricant is stearic acid
At least one in calcium, OPE, paraffin, tristerin.
6. a kind of agricultural according to claim 1 uses black polyethylene mulch film, it is characterized in that：The silane coupler is
One kind in KH550, KH560, KH570.
7. a kind of agricultural according to claim 1 uses black polyethylene mulch film, it is characterized in that：The multifunctional mother granules are by interior
To outward successively including release layer, slow release layer and coating layer；The release layer is by following material composition：Chemical enhancement agent 20-
30wt%, insecticidal constituent 10-20wt%, plural gel carrier 48-58wt%, modified oxidized calcium 4-6wt%, adhesive 1-
3wt%；The slow release layer is by following material composition：Chemical enhancement agent 20-30wt%, insecticidal constituent 10-20wt%, cyclodextrin
53-63wt%, adhesive 1-3wt%；The coating layer is alcohol-soluble macromolecule resin.
8. a kind of agricultural according to claim 7 uses black polyethylene mulch film, it is characterized in that：The release layer, slow release layer
It is 1 with the mass ratio of coating layer:2-4:0.3-0.5.
9. a kind of agricultural according to claim 7 uses black polyethylene mulch film, it is characterized in that：The chemical enhancement agent was
At least one in calcium oxide, urea peroxide and SODIUM PERCARBONATE；The insecticidal constituent is MTI-446, clothianidin, thiacloprid, pyrrole worm
At least one in quinoline；Described adhesive is PVP；The cyclodextrin is alpha-cyclodextrin, beta-schardinger dextrin or gamma-cyclodextrin；Institute
Alcohol-soluble macromolecule resin is stated for alcohol-soluble polyurethane or alcohol soluble polyacrylate.
10. the preparation method of black polyethylene mulch film is used according to a kind of described agriculturals of one of claim 1-9, it is characterized in that step
Suddenly it is：
Step 1：Doped nano titanium dioxide is added in silane coupler and is well mixed；
Step 2：After by the material of step 1 and black agglomerate, multifunctional mother granules, lubricant, polyvinyl alcohol and polyethylene blend, lead to
Cross screw extruder granulation；
Step 3：Material after granulation is obtained mulch film by inflation film manufacturing machine.
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| CN109105201A (en) * | 2018-09-26 | 2019-01-01 | 云南味酷食品有限公司 | The green planting method of edible rose |
| CN109181168A (en) * | 2018-11-07 | 2019-01-11 | 温州莲华环保科技有限公司 | A kind of plant protection water-permeable membrane and preparation process |
| CN110330716A (en) * | 2019-07-19 | 2019-10-15 | 陕西科技大学 | A kind of polyethylene or acrylic resin mulch hollow plastic ball and its application method for Arid&semi-arid area |
| CN110885490A (en) * | 2019-12-17 | 2020-03-17 | 甘肃省农业科学院 | Special easily-recycled mulching film for large-scale potato farm planting |
| WO2022243787A1 (en) | 2021-05-21 | 2022-11-24 | Stockford Ltd | A protective covering for mitigating smoke taint |
| CN116285066A (en) * | 2023-03-31 | 2023-06-23 | 广东省科学院生物与医学工程研究所 | Weeding mulching film product without chemical herbicide and preparation method thereof |
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| CN116285066A (en) * | 2023-03-31 | 2023-06-23 | 广东省科学院生物与医学工程研究所 | Weeding mulching film product without chemical herbicide and preparation method thereof |
| CN117382285A (en) * | 2023-10-10 | 2024-01-12 | 山东农业大学 | Multifunctional controllable multilayer co-extrusion biodegradable mulching film and preparation method thereof |
| CN117382285B (en) * | 2023-10-10 | 2024-05-17 | 山东农业大学 | Multifunctional controllable multilayer co-extrusion biodegradable mulching film and preparation method thereof |
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