CN106496650A - A kind of preparation method of sugarcane field degradable function mulch film - Google Patents
A kind of preparation method of sugarcane field degradable function mulch film Download PDFInfo
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L3/00—Compositions of starch, amylose or amylopectin or of their derivatives or degradation products
- C08L3/04—Starch derivatives, e.g. crosslinked derivatives
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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
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- C08B31/00—Preparation of derivatives of starch
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- C08J7/04—Coating
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- C08J7/065—Low-molecular-weight organic substances, e.g. absorption of additives in the surface of the article
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- C08L3/00—Compositions of starch, amylose or amylopectin or of their derivatives or degradation products
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- C08J2405/00—Characterised by the use of polysaccharides or of their derivatives not provided for in groups C08J2401/00 or C08J2403/00
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Abstract
The present invention relates to a kind of preparation method of sugarcane field degradable function mulch film, belongs to agricultural mulching technical field.The present invention is with bagasse as raw material, through steam explosion, bagasse fibre is obtained after dissolving remove impurity, destroyed in starch molecule by epoxychloropropane again and intermolecular hydrogen bond, by epoxychloropropane graft crosslinking, strengthen the plasticity and pliability of starch, reduce fragility, make starch easily processed into type, modified starch is obtained, finally by bagasse fibre, the mixing crosslinking such as modified starch, striking film forming, is reconfigured at azophoska, with insecticide, the mixed liquor of herbicide, and be sprayed on thin film, then through hot press envelope modeling, sugarcane field degradable function mulch film is obtained.Mulch film prepared by the present invention is degradable, by the moisture in absorption air and can be stored in the molded lattice bag of envelope, and in the high temperature period, transpiration into steam and dissolves part fertilizer again, enter soil, and fertilizer slow release is entered soil in degradation process, improve soil quality, improve sugarcane yield.
Description
Technical field
The present invention relates to a kind of preparation method of sugarcane field degradable function mulch film, belongs to agricultural mulching technical field.
Background technology
Mulch film is covered ground thin film, is covered in ground, can improve the soil moisture, keeps soil moisture, improves fertilizer efficiency,
Soil structure, the disease for preventing pest attacks crop and certain micro-organisms from causing etc. is maintained, promotes the function of plant growing.From
Was carried out to mulch film in 1979 small area on-test, now existing more than 30 years history.At present, mulch film is in national 31 provinces and cities
Autonomous region's popularization and application, for 40 multiple kinds of crops such as grain, cotton, oil, dish, melon and fruit, cigarette, sugar, medicine, fiber crops, tea, woods, are received deeply
The welcome of vast farmerses.
Starch base mulch film has the advantages that extensive raw material sources, degradable, free from environmental pollution, insect prevention are disease-resistant, by more next
More concerns.Britain, the U.S., Canada, Holland take advantage in terms of the research of starch-based degradable mulch film, domestic relevant
The research and development report of starch-based degradable mulch film is quite a few, but as the compatibility of starch is low, the mechanical property of processing difficulties, product
The problems such as poor with water resistance, starch addition is restricted, and degradation property is unreliable, and actual promotion and application effect is not
Significantly.
At present, China's covering with ground sheeting area is up to 13,330,000 hm2More than, and with 66.67 ten thousand hm every year on average2The speed of left and right
Degree increases, and about 450,000 tons of the real consumption amount of annual mulch film occupies first place in the world.Substantial amounts of residual film exists so that soil moisture nutrient
Transport downwards hindered, soil gap and permeability reduce, and are unfavorable for soil air circulation and pour, and land quality declines,
So as to cause crop alimentary bad, yield declines.When soil mulching film residual quantity is up to 60 kg/hm2When, will make to crops
Into the underproduction, the heavy metal in mulch film can be absorbed in the trophophase of Caulis Sacchari sinensis, be eventually collected in the root of Caulis Sacchari sinensis, stem, Ye Shang, finally
Affect the yield of Caulis Sacchari sinensis., used as a kind of important sugar crop, whole trophophase is larger to the demand of moisture for Caulis Sacchari sinensis, but due to
Its economic value added is relatively low, and cane -growing region is distributed mainly on the poor arid hillside field of drought, soil fertility, simultaneously because ploughing
Make inclement condition, lack the management method of science, cause weeds in field insect pest serious, greatly have impact on yield and the sugar of Caulis Sacchari sinensis
Point.Therefore, degradable films are developed, for reduction white pollution, is improved soil quality, is ensured that sugarcane yield has important meaning
Justice.
Content of the invention
The technical problem to be solved：Land quality is caused to decline for sugarcane field mulch film residual, and due to
Tillage condition is severe, lacks the management method of science, causes weeds in field insect pest serious, greatly have impact on Caulis Sacchari sinensis yield and
The problem of sugar, the invention provides a kind of preparation method of sugarcane field degradable function mulch film, the present invention is with bagasse as original
Material, through steam explosion, is obtained bagasse fibre, then is destroyed by epoxychloropropane in starch molecule and intermolecular after dissolving remove impurity
Hydrogen bond, by epoxychloropropane graft crosslinking, strengthen the plasticity and pliability of starch, reduce fragility, make starch be easy to plus
Work molding, is obtained modified starch, finally by bagasse fibre, modified starch, and shitosan, nano silicon, polyvinyl alcohol etc.
Mixing crosslinking, striking film forming is reconfigured at azophoska, and insecticide, the mixed liquor of herbicide, and is sprayed on thin film, then passes through
Hot press envelope modeling, is obtained sugarcane field degradable function mulch film.Sugarcane field degradable function mulch film prepared by the present invention is degradable, energy
Moisture in by absorption air is simultaneously stored in the molded lattice bag of envelope, and in the high temperature period, transpiration into steam and dissolves part again
Fertilizer, enters soil, and fertilizer slow release is entered soil in degradation process, improves soil quality, improves sugarcane yield.
For solving above-mentioned technical problem, the technical solution used in the present invention is：
（1）3 ~ 5kg bagasse is weighed, is added in pulverizer after natural air drying and is crushed, cross 100 mesh sieves, by the bagasse after sieving
Powder load steam explosion tank in, be heated to 110 ~ 120 DEG C, and be passed through water vapour in steam explosion tank to pressure inside the tank be
1.6 ~ 1.9MPa, after keeping 5 ~ 8min of pressure, opens steam explosion tank valve pressure release, and pressure release is then soaked in 70 ~ 80 to normal pressure
10 ~ 15min in DEG C deionized water, filters and collects filtering residue, obtain Steam explosion treatment bagasse powder；
（2）By above-mentioned Steam explosion treatment bagasse powder, it is in 10% hydrogen peroxide, 70 to be immersed in 500 ~ 600mL mass fractions
1 ~ 2h is reacted under ~ 80 DEG C of waters bath with thermostatic control, obtain mixed liquor, then be that 5% sodium hydroxide solution regulation pH of mixed is with mass fraction
11.0 ~ 12.0, and 2 ~ 3h is reacted under 80 ~ 85 DEG C of waters bath with thermostatic control, subsequent vacuum filtration, then be that 50% ethanol is molten with mass fraction
Liquid washs filter cake to cleaning mixture in neutrality, filter cake is proceeded in 105 ~ 110 DEG C of drying baker and is dried to constant weight, obtain bagasse fibre,
Standby；
（3）Weigh 320 ~ 350g starch, add in 200 ~ 300mL deionized waters, under 30 ~ 35 DEG C of waters bath with thermostatic control, with 300 ~
400r/min stirs 20 ~ 30min of gelatinizing, adds 25 ~ 30mL epoxychloropropane, is continuously heating to 35 ~ 40 DEG C, and persistently stirs
5 ~ 6h of reaction is mixed, is then continued in drying baker, 3 ~ 5h is dried at 70 ~ 80 DEG C, obtain modified starch；
（4）Weigh 80 ~ 100g shitosans, add 600 ~ 800mL mass fractions to be in 1% acetum, and with 300 ~ 400r/min
15 ~ 20min of stirring, adds 20 ~ 30g nano silicons, the above-mentioned modified starches of 300 ~ 320g, 30 ~ 50g steps（2）Prepare
Bagasse fibre, 100 ~ 150mL polyvinyl alcohol, in 80 ~ 85 DEG C of waters bath with thermostatic control, continue 2 ~ 3h of agitating heating, be cooled to room
Temperature, obtains coating liquid, with scraper by coating liquid one layer of 0.1 ~ 0.5mm thin film of striking on smooth glass plate, be subsequently placed at drying
In case, at 60 ~ 65 DEG C, 20 ~ 24h is dried, degradable films are obtained；
（5）Weigh 8 ~ 10kg carbamide, 12 ~ 15kg phosphorus pentoxides, 10 ~ 12kg potassium sulfate, 50 ~ 60g cypermethrins, 10 ~ 30g hundred
In the withered addition 15 ~ 20L deionized waters of grass, 20 ~ 30min is stirred with 300 ~ 400r/min, is reinstalled in aerosol apparatus, and is uniformly sprayed
In 667m2On above-mentioned degradable films, then continue in drying baker, at 60 ~ 65 DEG C, dry 10 ~ 12h, obtaining pretreatment can drop
Degrading film；
（6）Above-mentioned pretreatment degradable films are cut into 50cm × 100cm rectangular shaped sheets, 2 thin film is taken, by pretreatment face
Load after superposition in hot press, at 120 ~ 140 DEG C, with 5cm × 5cm grid 8 ~ 10min of hot pressing, take out, obtaining sugarcane field can drop
Solution function mulch film.
The present invention application process be：By the sugarcane field degradable function covering with ground sheeting of present invention preparation on sugarcane field,
The coverage mode of mulch film be vertical with ditch direction is planted carry out overlay film, overlay film carries out a firming every 3 ~ 5m, and film will be close to plant ditch,
Then fetch earth and the mulch film that plants on ditch is compressed, is compacted with hack, after 18 ~ 22 days, relative humidity is 92 ~ 96%, 5 ~ 6 months in film
Afterwards, Plastic-film disintegration rate is 80 ~ 85%, and sugarcane yield improves 30 ~ 40%, and sugar improves 15 ~ 28%.
The method have the benefit that：
（1）Sugarcane field degradable function mulch film water holding capacity prepared by the present invention is good, and heat and moisture preserving effect is obvious, degradation effect
Good；
（2）Sugarcane field degradable function mulch film prepared by the present invention can be effectively improved soil quality, reduce Seedling of Sugarcane Under Water Stress insect pest, have
Effect suppresses weed growth, improves sugarcane yield and sugar.
Specific embodiment
3 ~ 5kg bagasse is weighed, is added in pulverizer after natural air drying and is crushed, cross 100 mesh sieves, by the bagasse after sieving
Powder load steam explosion tank in, be heated to 110 ~ 120 DEG C, and be passed through water vapour in steam explosion tank to pressure inside the tank be
1.6 ~ 1.9MPa, after keeping 5 ~ 8min of pressure, opens steam explosion tank valve pressure release, and pressure release is then soaked in 70 ~ 80 to normal pressure
10 ~ 15min in DEG C deionized water, filters and collects filtering residue, obtain Steam explosion treatment bagasse powder；At above-mentioned steam explosion
Reason bagasse powder, is immersed in 500 ~ 600mL mass fractions in 10% hydrogen peroxide, under 70 ~ 80 DEG C of waters bath with thermostatic control reaction 1 ~
2h, obtains mixed liquor, then is that to adjust pH of mixed be 11.0 ~ 12.0 to 5% sodium hydroxide solution with mass fraction, and in 80 ~ 85 DEG C of perseverances
React 2 ~ 3h under tepidarium, subsequent vacuum filtration, then washed during filter cake to cleaning mixture is in for 50% ethanol solution with mass fraction
Property, filter cake is proceeded to and dry to constant weight in 105 ~ 110 DEG C of drying baker, obtain bagasse fibre；320 ~ 350g starch is weighed, is added
In 200 ~ 300mL deionized waters, under 30 ~ 35 DEG C of waters bath with thermostatic control, 20 ~ 30min of gelatinizing is stirred with 300 ~ 400r/min, is added
25 ~ 30mL epoxychloropropane, is continuously heating to 35 ~ 40 DEG C, and continues stirring reaction 5 ~ 6h, then continues in drying baker, 70 ~
3 ~ 5h is dried at 80 DEG C, modified starch is obtained；80 ~ 100g shitosans are weighed, it is 1% acetum to add 600 ~ 800mL mass fractions
In, and 15 ~ 20min is stirred with 300 ~ 400r/min, add 20 ~ 30g nano silicons, the above-mentioned modified shallow lakes of 300 ~ 320g
Powder, the above-mentioned bagasse fibres of 30 ~ 50g, 100 ~ 150mL polyvinyl alcohol, in 80 ~ 85 DEG C of waters bath with thermostatic control, continue agitating heating 2 ~
3h, is cooled to room temperature, obtains coating liquid, with scraper by coating liquid one layer of 0.1 ~ 0.5mm thin film of striking on smooth glass plate, with
After be placed in drying baker, at 60 ~ 65 DEG C, dry 20 ~ 24h, obtain degradable films；Weigh 8 ~ 10kg carbamide, 12 ~ 15kg, five oxygen
Change two phosphorus, 10 ~ 12kg potassium sulfate, 50 ~ 60g cypermethrins, 10 ~ 30g N,N'-dimethyl-.gamma..gamma.'-dipyridyliums are added in 15 ~ 20L deionized waters, with 300 ~
400r/min stirs 20 ~ 30min, reinstalls in aerosol apparatus, and is uniformly sprayed at 667m2On above-mentioned degradable films, subsequently turn
Enter in drying baker, at 60 ~ 65 DEG C, dry 10 ~ 12h, obtain pretreatment degradable films；Above-mentioned pretreatment degradable films are cut
50cm × 100cm rectangular shaped sheets are cut into, 2 thin film are taken, are loaded in hot press, at 120 ~ 140 DEG C after pretreatment face is superimposed
Under, with 5cm × 5cm grid 8 ~ 10min of hot pressing, take out, obtain sugarcane field degradable function mulch film.
Example 1
3kg bagasse is weighed, is added in pulverizer after natural air drying and is crushed, cross 100 mesh sieves, the bagasse powder dress after sieving
Enter in steam explosion tank, be heated to 110 DEG C, and be passed through in steam explosion tank water vapour to pressure inside the tank be 1.6MPa, keep
After pressure 5min, steam explosion tank valve pressure release is opened, pressure release is then soaked in 10min in 70 DEG C of deionized waters, mistake to normal pressure
Filter and collect filtering residue, obtain Steam explosion treatment bagasse powder；By above-mentioned Steam explosion treatment bagasse powder, it is immersed in
500mL mass fractions are in 10% hydrogen peroxide, under 70 DEG C of waters bath with thermostatic control react 1h, obtain mixed liquor, then are 5% hydrogen with mass fraction
It is 11.0 that sodium hydroxide solution adjusts pH of mixed, and reacts 2h, subsequent vacuum filtration under 80 DEG C of waters bath with thermostatic control, then is divided with quality
Number is in neutrality for 50% ethanol solution washing filter cake to cleaning mixture, filter cake is proceeded in 105 DEG C of drying baker and is dried to constant weight, obtained sweet
Sugarcane fiber；320g starch is weighed, is added in 200mL deionized waters, under 30 DEG C of waters bath with thermostatic control, gelatinizing is stirred with 300r/min
20min, adds 25mL epoxychloropropane, is continuously heating to 35 DEG C, and continues stirring reaction 5h, then continues in drying baker,
3h is dried at 70 DEG C, modified starch is obtained；Weigh 80g shitosans, add the 600mL mass fractions to be in 1% acetum, and with
300r/min stirs 15min, adds 20g nano silicons, the above-mentioned modified starches of 300g, the above-mentioned bagasse fibres of 30g,
100mL polyvinyl alcohol, in 80 DEG C of waters bath with thermostatic control, continues agitating heating 2h, is cooled to room temperature, obtains coating liquid, will be applied with scraper
Film liquid one layer of 0.1mm thin film of striking on smooth glass plate, is subsequently placed in drying baker, at 60 DEG C, dries 20h, and obtaining can
Degradable film；8kg carbamide is weighed, 12kg phosphorus pentoxides, 10kg potassium sulfate, 50g cypermethrins, 10g N,N'-dimethyl-.gamma..gamma.'-dipyridyliums add 15L to go
In ionized water, 20min is stirred with 300r/min, is reinstalled in aerosol apparatus, and is uniformly sprayed at 667m2Above-mentioned degradable films
On, then continue in drying baker, at 60 DEG C, dry 10h, obtain pretreatment degradable films；Will be thin for above-mentioned pretreatment degradable
Film is cut into 50cm × 100cm rectangular shaped sheets, takes 2 thin film, loads in hot press, at 120 DEG C after pretreatment face is superimposed
Under, with 5cm × 5cm grid hot pressing 8min, take out, obtain sugarcane field degradable function mulch film.
The present invention application process be：By the sugarcane field degradable function covering with ground sheeting of present invention preparation on sugarcane field,
The coverage mode of mulch film be vertical with ditch direction is planted carry out overlay film, overlay film carries out a firming every 3m, and film will be close to plant ditch, so
Fetch earth afterwards and the mulch film that plants on ditch is compressed, is compacted with hack, after 18 days, relative humidity is 92% in film, after 5 months, Plastic-film disintegration
Rate is 80%, and sugarcane yield improves 30%, and sugar improves 15%.
Example 2
4kg bagasse is weighed, is added in pulverizer after natural air drying and is crushed, cross 100 mesh sieves, the bagasse powder dress after sieving
Enter in steam explosion tank, be heated to 115 DEG C, and be passed through in steam explosion tank water vapour to pressure inside the tank be 1.8MPa, keep
After pressure 6min, steam explosion tank valve pressure release is opened, pressure release is then soaked in 12min in 75 DEG C of deionized waters, mistake to normal pressure
Filter and collect filtering residue, obtain Steam explosion treatment bagasse powder；By above-mentioned Steam explosion treatment bagasse powder, it is immersed in
550mL mass fractions are in 10% hydrogen peroxide, under 75 DEG C of waters bath with thermostatic control react 1.5h, obtain mixed liquor, then are 5% with mass fraction
It is 11.3 that sodium hydroxide solution adjusts pH of mixed, and reacts 2.5h, subsequent vacuum filtration under 82 DEG C of waters bath with thermostatic control, then uses matter
It is in neutrality to cleaning mixture that amount fraction is 50% ethanol solution washing filter cake, filter cake is proceeded in 108 DEG C of drying baker and is dried to constant weight,
Obtain bagasse fibre；340g starch is weighed, is added in 270mL deionized waters, under 32 DEG C of waters bath with thermostatic control, is stirred with 360r/min
Gelatinizing 25min, adds 28mL epoxychloropropane, is continuously heating to 38 DEG C, and continues stirring reaction 5.5h, then continues at dry
In dry case, 4h is dried at 75 DEG C, obtain modified starch；90g shitosans are weighed, it is 1% acetum to add 700mL mass fractions
In, and 18min is stirred with 350r/min, add 25g nano silicons, the above-mentioned modified starches of 310g, the above-mentioned bagasse of 40g
Fiber, 120mL polyvinyl alcohol, in 82 DEG C of waters bath with thermostatic control, continue agitating heating 2.5h, are cooled to room temperature, obtain coating liquid, with scraping
Knife one layer of 0.2mm thin film of striking on smooth glass plate by coating liquid, is subsequently placed in drying baker, at 62 DEG C, dries
22h, obtains degradable films；Weigh 9kg carbamide, 13kg phosphorus pentoxides, 11kg potassium sulfate, 55g cypermethrins, 20g N,N'-dimethyl-.gamma..gamma.'-dipyridyliums
Add in 18L deionized waters, 25min is stirred with 350r/min, is reinstalled in aerosol apparatus, and is uniformly sprayed at 667m2Above-mentioned can
On degradable film, then continue in drying baker, at 62 DEG C, dry 11h, obtain pretreatment degradable films；By above-mentioned pretreatment
Degradable films are cut into 50cm × 100cm rectangular shaped sheets, take 2 thin film, load in hot press after pretreatment face is superimposed,
At 130 DEG C, with 5cm × 5cm grid hot pressing 9min, take out, obtain sugarcane field degradable function mulch film.
The present invention application process be：By the sugarcane field degradable function covering with ground sheeting of present invention preparation on sugarcane field,
The coverage mode of mulch film be vertical with ditch direction is planted carry out overlay film, overlay film carries out a firming every 4m, and film will be close to plant ditch, so
Fetch earth afterwards and the mulch film that plants on ditch is compressed, is compacted with hack, after 20 days, relative humidity is 94% in film, after 5.5 months, mulch film drops
Solution rate is 83%, and sugarcane yield improves 36%, and sugar improves 18%.
Example 3
5kg bagasse is weighed, is added in pulverizer after natural air drying and is crushed, cross 100 mesh sieves, the bagasse powder dress after sieving
Enter in steam explosion tank, be heated to 120 DEG C, and be passed through in steam explosion tank water vapour to pressure inside the tank be 1.9MPa, keep
After pressure 8min, steam explosion tank valve pressure release is opened, pressure release is then soaked in 15min in 80 DEG C of deionized waters, mistake to normal pressure
Filter and collect filtering residue, obtain Steam explosion treatment bagasse powder；By above-mentioned Steam explosion treatment bagasse powder, it is immersed in
600mL mass fractions are in 10% hydrogen peroxide, under 80 DEG C of waters bath with thermostatic control react 2h, obtain mixed liquor, then are 5% hydrogen with mass fraction
It is 12.0 that sodium hydroxide solution adjusts pH of mixed, and reacts 3h, subsequent vacuum filtration under 85 DEG C of waters bath with thermostatic control, then is divided with quality
Number is in neutrality for 50% ethanol solution washing filter cake to cleaning mixture, filter cake is proceeded in 110 DEG C of drying baker and is dried to constant weight, obtained sweet
Sugarcane fiber；350g starch is weighed, is added in 300mL deionized waters, under 35 DEG C of waters bath with thermostatic control, gelatinizing is stirred with 400r/min
30min, adds 30mL epoxychloropropane, is continuously heating to 40 DEG C, and continues stirring reaction 6h, then continues in drying baker,
5h is dried at 80 DEG C, modified starch is obtained；Weigh 100g shitosans, add the 800mL mass fractions to be in 1% acetum, and with
400r/min stirs 20min, adds 30g nano silicons, the above-mentioned modified starches of 320g, the above-mentioned bagasse fibres of 50g,
150mL polyvinyl alcohol, in 85 DEG C of waters bath with thermostatic control, continues agitating heating 3h, is cooled to room temperature, obtains coating liquid, will be applied with scraper
Film liquid one layer of 0.5mm thin film of striking on smooth glass plate, is subsequently placed in drying baker, at 65 DEG C, dries 24h, and obtaining can
Degradable film；10kg carbamide is weighed, 15kg phosphorus pentoxides, 12kg potassium sulfate, 60g cypermethrins, 30g N,N'-dimethyl-.gamma..gamma.'-dipyridyliums add 20L
In deionized water, 30min is stirred with 400r/min, is reinstalled in aerosol apparatus, and is uniformly sprayed at 667m2Above-mentioned degradable films
On, then continue in drying baker, at 65 DEG C, dry 12h, obtain pretreatment degradable films；Will be thin for above-mentioned pretreatment degradable
Film is cut into 50cm × 100cm rectangular shaped sheets, takes 2 thin film, loads in hot press, at 140 DEG C after pretreatment face is superimposed
Under, with 5cm × 5cm grid hot pressing 10min, take out, obtain sugarcane field degradable function mulch film.
The present invention application process be：By the sugarcane field degradable function covering with ground sheeting of present invention preparation on sugarcane field,
The coverage mode of mulch film be vertical with ditch direction is planted carry out overlay film, overlay film carries out a firming every 5m, and film will be close to plant ditch, so
Fetch earth afterwards and the mulch film that plants on ditch is compressed, is compacted with hack, after 22 days, relative humidity is 96% in film, after 6 months, Plastic-film disintegration
Rate is 85%, and sugarcane yield improves 40%, and sugar improves 28%.
Claims (1)
1. a kind of preparation method of sugarcane field degradable function mulch film, it is characterised in that concrete preparation process is：
（1）3 ~ 5kg bagasse is weighed, is added in pulverizer after natural air drying and is crushed, cross 100 mesh sieves, by the bagasse after sieving
Powder load steam explosion tank in, be heated to 110 ~ 120 DEG C, and be passed through water vapour in steam explosion tank to pressure inside the tank be
1.6 ~ 1.9MPa, after keeping 5 ~ 8min of pressure, opens steam explosion tank valve pressure release, and pressure release is then soaked in 70 ~ 80 to normal pressure
10 ~ 15min in DEG C deionized water, filters and collects filtering residue, obtain Steam explosion treatment bagasse powder；
（2）By above-mentioned Steam explosion treatment bagasse powder, it is in 10% hydrogen peroxide, 70 to be immersed in 500 ~ 600mL mass fractions
1 ~ 2h is reacted under ~ 80 DEG C of waters bath with thermostatic control, obtain mixed liquor, then be that 5% sodium hydroxide solution regulation pH of mixed is with mass fraction
11.0 ~ 12.0, and 2 ~ 3h is reacted under 80 ~ 85 DEG C of waters bath with thermostatic control, subsequent vacuum filtration, then be that 50% ethanol is molten with mass fraction
Liquid washs filter cake to cleaning mixture in neutrality, filter cake is proceeded in 105 ~ 110 DEG C of drying baker and is dried to constant weight, obtain bagasse fibre,
Standby；
（3）Weigh 320 ~ 350g starch, add in 200 ~ 300mL deionized waters, under 30 ~ 35 DEG C of waters bath with thermostatic control, with 300 ~
400r/min stirs 20 ~ 30min of gelatinizing, adds 25 ~ 30mL epoxychloropropane, is continuously heating to 35 ~ 40 DEG C, and persistently stirs
5 ~ 6h of reaction is mixed, is then continued in drying baker, 3 ~ 5h is dried at 70 ~ 80 DEG C, obtain modified starch；
（4）Weigh 80 ~ 100g shitosans, add 600 ~ 800mL mass fractions to be in 1% acetum, and with 300 ~ 400r/min
15 ~ 20min of stirring, adds 20 ~ 30g nano silicons, the above-mentioned modified starches of 300 ~ 320g, 30 ~ 50g steps（2）Prepare
Bagasse fibre, 100 ~ 150mL polyvinyl alcohol, in 80 ~ 85 DEG C of waters bath with thermostatic control, continue 2 ~ 3h of agitating heating, be cooled to room
Temperature, obtains coating liquid, with scraper by coating liquid one layer of 0.1 ~ 0.5mm thin film of striking on smooth glass plate, be subsequently placed at drying
In case, at 60 ~ 65 DEG C, 20 ~ 24h is dried, degradable films are obtained；
（5）Weigh 8 ~ 10kg carbamide, 12 ~ 15kg phosphorus pentoxides, 10 ~ 12kg potassium sulfate, 50 ~ 60g cypermethrins, 10 ~ 30g hundred
In the withered addition 15 ~ 20L deionized waters of grass, 20 ~ 30min is stirred with 300 ~ 400r/min, is reinstalled in aerosol apparatus, and is uniformly sprayed
In 667m2On above-mentioned degradable films, then continue in drying baker, at 60 ~ 65 DEG C, dry 10 ~ 12h, obtaining pretreatment can drop
Degrading film；
（6）Above-mentioned pretreatment degradable films are cut into 50cm × 100cm rectangular shaped sheets, 2 thin film is taken, by pretreatment face
Load after superposition in hot press, at 120 ~ 140 DEG C, with 5cm × 5cm grid 8 ~ 10min of hot pressing, take out, obtaining sugarcane field can drop
Solution function mulch film.
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| CN107973941A (en) * | 2017-12-07 | 2018-05-01 | 中国热带农业科学院农产品加工研究所 | Degradable bagasse mulch and preparation method thereof |
| CN108396559A (en) * | 2018-02-05 | 2018-08-14 | 广西大学 | A kind of bagasse base film and preparation method thereof |
| CN110419369A (en) * | 2019-08-28 | 2019-11-08 | 深圳市南理工技术转移中心有限公司 | A kind of weeding biological fiber film and preparation method thereof |
| CN112280271A (en) * | 2020-11-17 | 2021-01-29 | 湖北光合生物科技有限公司 | PLA (polylactic acid) degradable mulching film and preparation method thereof |
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| CN110419369A (en) * | 2019-08-28 | 2019-11-08 | 深圳市南理工技术转移中心有限公司 | A kind of weeding biological fiber film and preparation method thereof |
| CN112280271A (en) * | 2020-11-17 | 2021-01-29 | 湖北光合生物科技有限公司 | PLA (polylactic acid) degradable mulching film and preparation method thereof |
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