CN104693470A - Biodegradable agricultural mulching film - Google Patents
Biodegradable agricultural mulching film Download PDFInfo
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- CN104693470A CN104693470A CN201510129929.9A CN201510129929A CN104693470A CN 104693470 A CN104693470 A CN 104693470A CN 201510129929 A CN201510129929 A CN 201510129929A CN 104693470 A CN104693470 A CN 104693470A
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- biological degradation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/28—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture specially adapted for farming
Abstract
The invention discloses a biodegradable agricultural mulching film. The biodegradable agricultural mulching film comprises a biodegradable plastic body, one or more kinds of materials in the formula I, the formula I is R1-R2, wherein R1 is alkenyl or alkyl with number-average molecular weight ranging from 100 to 20000, and the alkenyl or alkyl with number-average molecular weight ranging from 200 to 6000 is preferred; R2 is hydrogen, hydroxy, ester group, dicarboxylic acid ester group, imide group, sulfo group, aldehyde group, ketone group, carbamido, amidogen and other active groups. According to the biodegradable agricultural mulching film, during placing and using process of the biodegradable agricultural mulching film, multilayer oil films formed in the upper outer surface and the lower outer surface can add the soil moisture conservation ability and the insulating ability of the biodegradable agricultural mulching film, and the oil films in the oil film layers of the biodegradable agricultural mulching film is composed of alcohol, olefin, amide or ester, so that high biocompatibility and biodegradability are possessed, and no residue exists when the oil films is used together with the biodegradable agricultural mulching film.
Description
Technical field
The present invention relates to a kind of agricultural mulching, be specifically related to a kind of biological degradation agricultural mulching.
Background technology
in recent years, the development of biodegradable plastic grows with each passing day, and application constantly expands, and at wrapping material, disposable tableware, the field such as plastic sheeting for farm use and everyday articles starts progressively to replace conventional plastic.Biodegradable plastic plastic sheeting for farm use is mainly used in farm crop soil and covers, and can play the effect improving ground temperature, maintenance soil humidity, promotion seed germination and seedling and increase fast, also have the effect suppressing weed growth after covering farm land.Extensively carry out the research work of degradable agricultural film both at home and abroad over nearly 30 years, develop starch addition type biological degradation plastic sheeting for farm use, photodegradation plastic sheeting for farm use, light/biological degradation plastic sheeting for farm use, vegetable fibre plastic sheeting for farm use and liquid sprinkling film etc.
But up to the present, because biodegradable plastic plastic sheeting for farm use is too easily degraded in placement or use procedure, thus cause the use properties high progression of biodegradable plastic plastic sheeting for farm use, its UV resistant performance, anti-hydrolytic performance and the poor-performing of resistance to acidolysis, thus make the work-ing life of biodegradable plastic plastic sheeting for farm use too short, in use low to preserving soil moisture, insulated capacity, significantly limit the practical application of biodegradable plastic plastic sheeting for farm use.
In addition, CN201410570498.5 discloses and is covered with one or more layers oil lamella at the outside surface of degradative plastics body, in the placement of biodegradable plastic plastic sheeting for farm use and use procedure, one or more layers oil lamella of its outside surface, biodegradable plastic can not only be made to have suitable biodegradation rate, and the barrier property of biodegradable plastic in placement use procedure can be improved, thus play the effect intercepting the external world, there is UV resistant, hydrolysis, resistance to acidolysis and water isolating, final preservation and the duration of service that can extend biodegradable plastic plastic sheeting for farm use, effective lifting crop soil moisture conservation, insulated capacity.Its defect is that the oil film used in this biological degradation plastic sheeting for farm use does not have good biocompatibility, greatly have impact on the biological degradation process of Biodegradable mulch matrix, cause Biodegradable mulch can not complete biodegradable, cause a small amount of residual, produce secondary environmental pollution.
The present invention is found by research, at the outside surface of biodegradable plastic body, one-sided or both sides are covered with oil lamella respectively, and the oil film of oil lamella is elected as the oil film of high degree of biocompatibility and good interface consistency, namely oil lamella is made up of alcohol, alkene, acid amides or ester, sulfonic group, aldehyde radical, ketone group, urea groups, amino, in the placement of biological degradation agricultural mulching and use procedure, on the one hand, oil film and Biodegradable mulch body have good interface compatibility, can increase biological degradation agricultural mulching to the soil moisture conservation of soil and insulated capacity; What is more important, oil film and the biological consistency with height, under having good interface consistency with body, oil lamella can be worked in coordination with body and together biological degradation be occurred, finally be converted into carbonic acid gas and water completely, solve conventional polyethylene mulch film and remain the environmental pollution caused.
Summary of the invention
The object of the present invention is to provide a kind of there is excellent soil moisture conservation, biological degradation agricultural mulching that insulated capacity and oil film and matrix agricultural mulching have high degree of biocompatibility, good interface consistency and biological degradability.
The present invention realizes in the following way:
A kind of biological degradation agricultural mulching, comprising:
Biodegradable plastic body, and
One or more in material described in formula I,
Formula I R
1-r
2,
Wherein, R
1for thiazolinyl or alkyl that number-average molecular weight is 100-20000, preferred number average molecular weight is 200-6000; R
2for hydrogen, hydroxyl, ester group, dicarboxylic acid ester group, amide group, imide, sulfonic group, aldehyde radical, ketone group, urea groups, amino and other active groups.
Preferably, a kind of biological degradation agricultural mulching, count by weight, comprising:
100 parts of biodegradable plastic bodies;
One or more in material described in 0.1-10 part formula I,
Formula I R
1-r
2
Wherein, R
1for thiazolinyl or alkyl that number-average molecular weight is 100-20000, preferred number average molecular weight is 200-6000; R
2for hydrogen, hydroxyl, ester group, dicarboxylic acid ester group, amide group, imide, sulfonic group, aldehyde radical, ketone group, urea groups, amino and other active groups.
Described active group can make R
1section has higher biocompatibility and good interface consistency with biological degradation agricultural mulching matrix, thus reaches good common biological degradation property.
Preferably, R is worked as
2during for hydrogen, the R in formula I
1for polyisobutene or epoxidation polyisobutene.
More preferably, the R in formula I
1for polyisobutene, its number-average molecular weight is 100-20000, and preferred number average molecular weight is 200-6000.
Preferably, the material that formula I is expressed is polyisobutene, polyisobutene succinimide, polyisobutylene succinic acid ester, epoxidation polyisobutene, polyisobutene alcohol or glycol and ester thereof.
Described polyisobutene number-average molecular weight is 100-20000, and preferred number average molecular weight is 200-6000.
The preparation method of above-mentioned biological degradation agricultural mulching, comprises the steps:
According to formula rate weighing raw materials, by load weighted starting material in advance in an oven 80 DEG C dry 5 hours, then stirring at low speed 10 minutes in high-speed mixer, go out after 5 minutes in high-speed stirring, the material that mixes is sent in twin screw extruder, be 160 DEG C-240 DEG C in temperature and carry out extruding pelletization and obtain biological degradation farming land coating materials; After the biological degradation farming land coating materials of gained is caused particle by hot-cut underwater mode, dry 2 hours for 80 DEG C in dehumidifying heat pump, then send into Single screw extrusion inflation film manufacturing machine and make the biodegradable plastic film that thickness is 4 μm.
A kind of biological degradation agricultural mulching, comprises biodegradable plastic body, and the one-sided or both sides of the outside surface of described biodegradable plastic body are covered with oil lamella, and the oil film of described oil lamella is one or more in material described in formula I,
Formula I R
1-r
2,
Wherein, R
1for thiazolinyl or alkyl that number-average molecular weight is 100-20000, preferred number average molecular weight is 200-6000; R
2for hydrogen, hydroxyl, ester group, dicarboxylic acid ester group, amide group, imide, sulfonic group, aldehyde radical, ketone group, urea groups, amino and other active groups.
Preferably, R is worked as
2during for hydrogen, the R in formula I
1for polyisobutene or epoxidation polyisobutene.
More preferably, the R in formula I
1for polyisobutene, its number-average molecular weight is 100-20000, and preferred number average molecular weight is 200-6000.
Preferably, the material that formula I is expressed is polyisobutene, polyisobutene succinimide, polyisobutylene succinic acid ester, epoxidation polyisobutene, polyisobutene alcohol or glycol and ester thereof.
The present invention is covered with oil lamella respectively by or both sides one-sided at the outside surface of biodegradable plastic body, and elect the oil film of oil lamella as in material described in formula I one or more, in the placement of biological degradation agricultural mulching and use procedure, the oil lamella of its outside surface both sides not only can increase the soil moisture conservation of biological degradation agricultural mulching to soil, insulated capacity, and the oil lamella of biological degradation agricultural mulching is by alcohol, alkene, acid amides or ester composition, there is high degree of biocompatibility and biological degradability, in the placement of biological degradation agricultural mulching and use procedure, on the one hand, oil film and Biodegradable mulch body have good interface compatibility, biological degradation agricultural mulching can be increased to the soil moisture conservation of soil and insulated capacity, what is more important, oil film and the biological consistency with height, under having good interface consistency with body, oil lamella can be worked in coordination with body and together biological degradation be occurred, finally be converted into carbonic acid gas and water completely, solve conventional polyethylene mulch film and remain the environmental pollution caused.
The oil lamella thickness of the outside surface of described biodegradable plastic body is 0.01-2.5um.
Wherein, described oil lamella is dissolved water insoluble in solvent oil.Described solvent oil can be defined as oils Cucumber being played to the effects such as dissolving, dilution, washing and extracting, refined through soda acid etc. through the light oil fraction that air distillation gained boiling spread is narrower by crude oil and obtain, also can carry out that distillation is refining to be formed again by the excess of taking out of the product of catalytic reforming after Aromatics Extractive Project, main component is alkane, naphthenic hydrocarbon and aromatic hydrocarbons.Petroleum solvent is usually by its 98% recovered temperature or do 100% recovered temperature and be divided into the trades mark such as 70,90,120,180,190,200.
1. No. 70 solvent oils, boiling range 60 DEG C-70 DEG C, main component is stable hydrocarbon.
2. No. 90 solvent oils, also known as sherwood oil, boiling range 60 DEG C-90 DEG C, main as industrial solvent and chemical reagent.
3. No. 120 solvent oils, also known as rubber solvent naphtha, boiling range 80 DEG C-120 DEG C.
4. No. 180 solvent oils, also known as aviation washing oil, boiling range 40 DEG C-180 DEG C.
5. No. 190 solvent oils, also known as non-leaded gasoline, boiling range 40 DEG C-190 DEG C.
6. No. 200 solvent oils, are commonly called as rosin.
The total thickness of described biological degradation agricultural mulching is 2-25um, preferred 4-13um.
Described biological degradation agricultural mulching also comprises 0.1-10 weight part additive, as stablizer, nucleator, neutralizing agent, softening agent, lubrication and releasing agent, tensio-active agent, static inhibitor, UV absorption agent, UV stablizer, thermo-stabilizer, antifogging agent, dyestuff, coloured pigment or active substance (such as crop protection agents is as mycocide, sterilant, biocide, growth stimulant, telergone and VITAMIN).Described biodegradable plastic body is the equal polyester of biological degradation and/or Biodegradable Copolyester.
The equal polyester of described biological degradation be selected from polylactic acid PLA, polyglycolic acid, poly-3-hydroxybutyrate PHB, poly-3-hydroxypentanoic acid, poly-3-hydroxycaproic acid, polycaprolactone (PCL), poly-hydroxybutyl acid esters, poly-valerolactone, poly (propylene carbonate) PPC one or more; Described Biodegradable Copolyester is selected from one or more of polyethylene glycol succinate, poly butylene succinate PBS, poly-succinic acid-butanediol altogether adipic acid ester PBSA, polybutylene terephthalate succinate PBST, polybutylene terephthalate adipic acid ester PBAT altogether altogether.
The preparation method of the biological degradation agricultural mulching described in the embodiment of the present invention, can be separate out by the material in biological degradation agricultural mulching formula to obtain to biological degradation agricultural mulching skin, also can be directly carry out surface-coated on biological degradation agricultural mulching surface to obtain.
directly carry out surface-coated on biological degradation agricultural mulching surface to comprise the steps:
A) biodegradable plastic body carried out oil removing, removal of impurities, remove electric pre-treatment;
B) oil film coating of oil lamella is overlayed on the pretreated biodegradable plastic body surface of step a); Or adopt spraying method that the oil film of oil lamella is sprayed on the pretreated biodegradable plastic body surface of step a) by one or many;
C) by illumination or on-line heating drying, time of drying is 1min-60min, to obtain final product.
wherein, the illumination described in step c) is selected from ultraviolet, infrared, fluorescent lamp or normal illumination.
The present invention compared with prior art, has following beneficial effect:
1) the present invention is covered with oil lamella respectively by or both sides one-sided at the outside surface of biodegradable plastic body, and elect the oil film of oil lamella as in material described in formula I one or more, in the placement of biological degradation agricultural mulching and use procedure, on the one hand, on it, the multilayer oil film that outer lower face surface is formed and biological degradation agricultural mulching body have good interface compatibility, the soil moisture conservation of biological degradation agricultural mulching to soil can be increased, insulated capacity, and the oil film of the oil lamella of biological degradation agricultural mulching is by alcohol, alkene, acid amides or ester composition, there is high degree of biocompatibility and biological degradability, degradable together together with biological degradation agricultural mulching, finally be converted into carbonic acid gas and water completely, solve conventional polyethylene mulch film and remain the environmental pollution caused.
2) production technique of the present invention is simple, and production cost is lower.
Accompanying drawing explanation
fig. 1 is the structural representation of biological degradation agricultural mulching of the present invention.
In figure: 1, biodegradable plastic body; 2, the first oil lamella; 3, the second oil lamella.
Embodiment
Further illustrate the present invention below by embodiment, following examples and comparative example are the present invention's preferably embodiment, but embodiments of the present invention are not by the restriction of following embodiment.
The preparation method of the biological degradation agricultural mulching described in the embodiment of the present invention, can be separate out by the material in biological degradation agricultural mulching formula to obtain to biological degradation agricultural mulching skin, also can be directly carry out surface-coated on biological degradation agricultural mulching surface to obtain.
embodiment 1
As shown in Figure 1, a kind of biological degradation agricultural mulching, comprises biodegradable plastic body 1, and the thickness that the upper outer surface of described biodegradable plastic body 1 is covered with one deck first oil lamella 2, first oil lamella 2 is 0.1 μm; It is 1.0 μm that the outer lower face surface of described biodegradable plastic body 1 is covered with one deck second oil lamella 3, second oil lamella 3 thickness, and the total thickness of described biodegradable plastic plastic sheeting for farm use is 15 μm, and the oil film of described oil lamella is polyisobutene, and number-average molecular weight is 1300.
Wherein, biodegradable plastic body is PBAT Biodegradable Copolyester.
first, by biodegradable plastic body being carried out oil removing, removal of impurities, removing electric pre-treatment, then the oil film of the oil film of the first oil lamella and the second oil lamella is coated in the upper and lower outside surface through pretreated biodegradable plastic body respectively, by on-line ultraviolet dry solidification 30min, obtain described biological degradation agricultural mulching.
In the put procedure of the biological degradation agricultural mulching prepared, the multilayer oil film that its upper and lower outside surface is formed and biological degradation agricultural mulching body have good interface compatibility, biological degradation agricultural mulching can be increased to the soil moisture conservation of soil, insulated capacity, and oil lamella is degraded together together with biological degradation agricultural mulching, finally be converted into carbonic acid gas and water completely, solve conventional polyethylene mulch film and remain the environmental pollution caused.
embodiment 2
As shown in Figure 1, a kind of biological degradation agricultural mulching containing high degree of biocompatibility oil film, comprises biodegradable plastic body 1, and the thickness that the upper outer surface of described biodegradable plastic body 1 is covered with the first oil lamella 2, first deep fat rete 2 is 0.5 μm; It is 0.5 μm that the outer lower face surface of described biodegradable plastic body 1 is covered with the second oil lamella 3, second oil lamella 3 thickness, and the total thickness of described biodegradable plastic plastic sheeting for farm use is 5 μm, and the oil film of described oil lamella is polyisobutene, and number-average molecular weight is 5000.All the other are with embodiment 1.
Wherein, biodegradable plastic body is the equal polyester of PPC biological degradation.
embodiment 3
As shown in Figure 1, a kind of biodegradable plastic plastic sheeting for farm use, comprises biodegradable plastic body 1, and the thickness that the upper outer surface of described biodegradable plastic body 1 is covered with the first oil lamella 2, first oil lamella 2 is 1.5 μm; It is 2.5 μm that the outer lower face surface of described biodegradable plastic body 1 is covered with the second oil lamella 3, second oil lamella 3 thickness, and the total thickness of described biodegradable plastic plastic sheeting for farm use is 13 μm, and the oil film of described oil lamella is epoxidation polyisobutene.All the other are with embodiment 1.
Wherein, biodegradable plastic body is PBSA Biodegradable Copolyester.
embodiment 4
As shown in Figure 1, a kind of biodegradable plastic plastic sheeting for farm use, comprises biodegradable plastic body 1, and the thickness that the upper outer surface of described biodegradable plastic body 1 is covered with one deck first oil lamella 2, first oil lamella 2 is 4 μm; The outer lower face surface of described biodegradable plastic body 1 is covered with one deck second oil lamella 3, second oil lamella 3 thickness is 4 μm, the total thickness of described biodegradable plastic plastic sheeting for farm use is 15 μm, the oil film of described oil lamella is polyisobutene succinimide, and wherein the number-average molecular weight of polyisobutene section is 1300.All the other are with embodiment 1.
Wherein, biodegradable plastic body is the equal polyester of PCL biological degradation.
embodiment 5
According to following formula rate weighing raw materials:
Biodegradable plastic body 100 parts;
Polyisobutene succinimide 1 part, wherein the number-average molecular weight of polyisobutene section is 1300.
By weigh starting material in advance in an oven 80 DEG C dry 5 hours, then stirring at low speed 10 minutes in high-speed mixer, go out after 5 minutes in high-speed stirring, the material that mixes is sent in twin screw extruder, be 160 DEG C-240 DEG C in temperature and carry out extruding pelletization and obtain biological degradation farming land coating materials; After the biological degradation farming land coating materials of gained is caused particle by hot-cut underwater mode, dry 2 hours for 80 DEG C in dehumidifying heat pump, then send into Single screw extrusion inflation film manufacturing machine and make the biodegradable plastic film that thickness is 4 μm.The agricultural mulching obtained with this time is benchmark, carries out correlated performance test.
Wherein, biodegradable plastic body is the equal polyester of PBAT biological degradation.
embodiment 6
According to following formula rate weighing raw materials:
Biodegradable plastic body 100 parts;
Polyisobutene 2 parts, number-average molecular weight is 20000;
Dodecylene succimide 3 parts;
By weigh starting material in advance in an oven 80 DEG C dry 5 hours, then stirring at low speed 10 minutes in high-speed mixer, go out after 5 minutes in high-speed stirring, the material that mixes is sent in twin screw extruder, be 160 DEG C-240 DEG C in temperature and carry out extruding pelletization and obtain biological degradation farming land coating materials; After the biological degradation farming land coating materials of gained is caused particle by hot-cut underwater mode, dry 2 hours for 80 DEG C in dehumidifying heat pump, then send into Single screw extrusion inflation film manufacturing machine and make the biodegradable plastic film that thickness is 13 μm.The agricultural mulching obtained with this time is benchmark, carries out correlated performance test.
Wherein, biodegradable plastic body is the equal polyester of PBAT biological degradation.
embodiment 7
According to following formula rate weighing raw materials:
Biodegradable plastic body 100 parts;
Polyisobutene succinimide 0.1 part, wherein the number-average molecular weight of polyisobutene section is 3000;
Fluidizer 10 parts
By weigh starting material in advance in an oven 80 DEG C dry 5 hours, then stirring at low speed 10 minutes in high-speed mixer, go out after 5 minutes in high-speed stirring, the material that mixes is sent in twin screw extruder, be 160 DEG C-240 DEG C in temperature and carry out extruding pelletization and obtain biological degradation farming land coating materials; After the biological degradation farming land coating materials of gained is caused particle by hot-cut underwater mode, dry 2 hours for 80 DEG C in dehumidifying heat pump, then send into Single screw extrusion inflation film manufacturing machine and make the biodegradable plastic film that thickness is 13 μm.The agricultural mulching obtained with this time is benchmark, carries out correlated performance test.
Wherein, biodegradable plastic body is the equal polyester of PBAT biological degradation.
embodiment 8
According to following formula rate weighing raw materials:
Biodegradable plastic body 100 parts;
Polyisobutene 3 parts, number-average molecular weight is 1500;
Polyisobutene succinimide 7 parts, wherein the number-average molecular weight of polyisobutene section is 10000;
Thermo-stabilizer 0.1 part;
By weigh starting material in advance in an oven 80 DEG C dry 5 hours, then stirring at low speed 10 minutes in high-speed mixer, go out after 5 minutes in high-speed stirring, the material that mixes is sent in twin screw extruder, be 160 DEG C-240 DEG C in temperature and carry out extruding pelletization and obtain biodegradable plastic composition; After the biodegradable plastic composition of gained is caused particle by hot-cut underwater mode, dry 2 hours for 80 DEG C in dehumidifying heat pump, then send into Single screw extrusion inflation film manufacturing machine and make the biodegradable plastic film that thickness is 13 μm.The agricultural mulching obtained with this time is benchmark, carries out correlated performance test.
Wherein, biodegradable plastic body is the equal polyester of PBAT biological degradation.
Comparative example 1: as shown in Figure 1, a kind of biological degradation agricultural mulching, comprises biodegradable plastic body 1, and the thickness that the upper outer surface of described biodegradable plastic body 1 is covered with one deck first oil lamella 2, first oil lamella 2 is 0.1 μm; It is 1.0 μm that the outer lower face surface of described biodegradable plastic body 1 is covered with one deck second oil lamella 3, second oil lamella 3 thickness, and the total thickness of described biodegradable plastic plastic sheeting for farm use is 15 μm.
Wherein, biodegradable plastic body is PBAT Biodegradable Copolyester.
First, by biodegradable plastic body being carried out oil removing, removal of impurities, removing electric pre-treatment, then the oil film paraffin of the first oil lamella and the oil film Vaseline of the second oil lamella are coated in the upper and lower outside surface through pretreated biodegradable plastic body respectively, by on-line ultraviolet dry solidification 30min, obtain the described biodegradable plastic plastic sheeting for farm use with surface coverage film.
Comparative example 2
Do not have a biodegradable plastic plastic sheeting for farm use for surface coverage film, thickness is 13 μm.Wherein, biodegradable plastic body is PBAT Biodegradable Copolyester.
the performance test results of table 1 embodiment
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 | Embodiment 7 | Embodiment 8 | Comparative example 1 | Comparative example 2 | |
| Soil moisture conservation (%) | 77.5 | 79.1 | 78.1 | 79.5 | 78.8 | 77.7 | 78.6 | 79.5 | 71.1 | 40 |
| Insulated capacity (%) | 29.3 | 31.6 | 29.5 | 28.8 | 28.4 | 28.2 | 29.5 | 32.6 | 23.1 | 9 |
| Biodegradability (%) | 97 | 96 | 96 | 96 | 98 | 99 | 96 | 99 | 89 | 92 |
Comparative example 3: by polyisobutene used in embodiment (number-average molecular weight is 5000) to specifications in " biodegradability testing method " compost measure biodegradability.
Comparative example 4: by polyisobutene succinimide used in embodiment (polyisobutene hop count average molecular weight is 3000) to specifications in " biodegradability testing method " compost measure biodegradability.
Comparative example 5: by epoxidation polyisobutene used in embodiment to specifications in " biodegradability testing method " compost measure biodegradability.
Comparative example 6: by dodecylene succimide used in embodiment to specifications in " biodegradability testing method " compost measure biodegradability.
The performance test results of table 2 comparative example 3-6
| Comparative example 3 | Comparative example 4 | Comparative example 5 | Comparative example 6 | |
| Biodegradability (%) | 11 | 14 | 13 | 10 |
the testing method of each performance index is as follows:
Biodegradability testing method: with reference to the testing method of ISO14855, with CO after 90 of material days compost
2burst size is degradation property index.
Soil moisture conservation: adopt oven drying method.In 0 ~ 50cm soil layer, every 10cm gets same weight soil sample 1 time respectively, and soil sample dries to constant weight (about 8h) in 105 ~ 110 DEG C of temperature ranges, then calculates soil water content W
water.Calculate the soil not covering plastic sheeting for farm use respectively, the soil covering embodiment and comparative example plastic sheeting for farm use with same time span, adjacent experiment field, same plot, at the soil water content of the 1st day and the 60th day, represents soil moisture conservation with water reduction rate, i.e. (W
water 1-W
water 60)/W
water 1.
Insulated capacity: the soil moisture measures and adopts ground-thermometer, inserts the lower degree of depth of soil and is respectively 5cm, 10cm and 15cm, the morning 9:00, afternoon, 15:00, read lower 5cm, 10cm and 15cm ground temperature of soil, calculating mean ground temperature T every day at 21 in evening respectively.Monitor the soil not covering plastic sheeting for farm use respectively, the mean ground temperature of the soil covering embodiment and comparative example plastic sheeting for farm use with same time span, adjacent experiment field, same plot when 1-90 days, and calculate the T of every day
△, T
△=(T
overlay film-T
non-overlay film)/T
non-overlay film., insulated capacity is 90 days T
△mean value.
Claims (14)
1. a biological degradation agricultural mulching, comprising:
Biodegradable plastic body, and
One or more in material described in formula I,
Formula I R
1-r
2,
Wherein, R
1for thiazolinyl or alkyl that number-average molecular weight is 100-20000, preferred number average molecular weight is 200-6000; R
2for hydrogen, hydroxyl, ester group, dicarboxylic acid ester group, amide group, imide, sulfonic group, aldehyde radical, ketone group, urea groups, amino and other active groups.
2. a biological degradation agricultural mulching, counts by weight, comprising:
100 parts of biodegradable plastic bodies;
One or more in material described in 0.1-10 part formula I,
Formula I R
1-r
2,
Wherein, R
1for thiazolinyl or alkyl that number-average molecular weight is 100-20000, preferred number average molecular weight is 200-6000; R
2for hydrogen, hydroxyl, ester group, dicarboxylic acid ester group, amide group, imide, sulfonic group, aldehyde radical, ketone group, urea groups, amino and other active groups.
3. biological degradation agricultural mulching according to claim 1 and 2, is characterized in that, work as R
2during for hydrogen, R
1for polyisobutene or epoxidation polyisobutene.
4. biological degradation agricultural mulching according to claim 1 and 2, is characterized in that, the R in formula I
1for polyisobutene or epoxidation polyisobutene.
5. biological degradation agricultural mulching according to claim 1 and 2, is characterized in that, the material that formula I is expressed is polyisobutene, polyisobutene succinimide, polyisobutylene succinic acid ester, epoxidation polyisobutene, polyisobutene alcohol or glycol and ester thereof.
6. a biological degradation agricultural mulching, comprises biodegradable plastic body, and the one-sided or both sides of the outside surface of described biodegradable plastic body are covered with oil lamella, it is characterized in that: the oil film of described oil lamella is one or more in material described in formula I,
Formula I R
1-r
2,
Wherein, R
1for thiazolinyl or alkyl that number-average molecular weight is 100-20000; R
2for hydrogen, hydroxyl, ester group, dicarboxylic acid ester group, amide group, imide, sulfonic group, aldehyde radical, ketone group, urea groups, amino and other active groups.
7. biological degradation agricultural mulching according to claim 6, is characterized in that, the R in formula I
1for polyisobutene or epoxidation polyisobutene.
8. biological degradation agricultural mulching according to claim 6, is characterized in that, the material that formula I is expressed is polyisobutene, polyisobutene succinimide, polyisobutylene succinic acid ester, epoxidation polyisobutene, polyisobutene alcohol or glycol and ester thereof.
9. biological degradation agricultural mulching according to claim 6, is characterized in that, the oil lamella thickness of the outside surface of described biodegradable plastic body is 0.01-2.5um.
10. biodegradable plastic plastic sheeting for farm use according to claim 6, is characterized in that, described oil lamella is dissolved water insoluble in solvent oil.
11. biological degradation agricultural mulchings according at least one item of claim 1 to 10, it is characterized in that, the total thickness of described biological degradation agricultural mulching is 2-25um, preferred 4-13um.
12. biological degradation agricultural mulchings according at least one item of claim 1 to 10, it is characterized in that, described biodegradable plastic body is the equal polyester of biological degradation and/or Biodegradable Copolyester.
13. biological degradation agricultural mulchings according at least one item of claim 1 to 10, is characterized in that, also comprise 0.1-10 weight part additive.
The 14. biological degradation agricultural mulchings containing high degree of biocompatibility oil film according to claim 12, it is characterized in that, the equal polyester of described biological degradation be selected from polylactic acid PLA, polyglycolic acid, poly-3-hydroxybutyrate PHB, poly-3-hydroxypentanoic acid, poly-3-hydroxycaproic acid, polycaprolactone (PCL), poly-hydroxybutyl acid esters, poly-valerolactone, poly (propylene carbonate) PPC one or more; Described Biodegradable Copolyester is selected from one or more of polyethylene glycol succinate, poly butylene succinate PBS, poly-succinic acid-butanediol altogether adipic acid ester PBSA, polybutylene terephthalate succinate PBST, polybutylene terephthalate adipic acid ester PBAT altogether altogether.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510129929.9A CN104693470A (en) | 2015-03-24 | 2015-03-24 | Biodegradable agricultural mulching film |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104830035A (en) * | 2015-05-18 | 2015-08-12 | 夏世勇 | Biodegradable composite with barrier property and preparation method and applications thereof |
| CN109111705A (en) * | 2018-06-25 | 2019-01-01 | 四川创客知佳科技有限公司 | A kind of environment-friendly composite material and preparation method thereof that can be degradable |
| WO2020132923A1 (en) * | 2018-12-26 | 2020-07-02 | 东莞正新包装制品有限公司 | Pe mulch film |
| CN112625414A (en) * | 2020-12-17 | 2021-04-09 | 北京易联结科技发展有限公司 | Seawater degradation composite material and preparation method thereof |
| CN114921073A (en) * | 2022-05-25 | 2022-08-19 | 上海大觉包装制品有限公司 | Degradable agricultural mulching film and preparation method thereof |
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| KR20040071992A (en) * | 2003-02-07 | 2004-08-16 | 에스케이케미칼주식회사 | Degradable mulching film coated water-absorbent material |
| CN202026649U (en) * | 2011-03-15 | 2011-11-09 | 漳州仂元工业有限公司 | Novel organic mulching film with surface being covered with wax layer |
| CN104387605A (en) * | 2014-10-23 | 2015-03-04 | 夏世勇 | Biodegradable agricultural plastic film with surface cover film |
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| KR20040071992A (en) * | 2003-02-07 | 2004-08-16 | 에스케이케미칼주식회사 | Degradable mulching film coated water-absorbent material |
| CN202026649U (en) * | 2011-03-15 | 2011-11-09 | 漳州仂元工业有限公司 | Novel organic mulching film with surface being covered with wax layer |
| CN104387605A (en) * | 2014-10-23 | 2015-03-04 | 夏世勇 | Biodegradable agricultural plastic film with surface cover film |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104830035A (en) * | 2015-05-18 | 2015-08-12 | 夏世勇 | Biodegradable composite with barrier property and preparation method and applications thereof |
| CN109111705A (en) * | 2018-06-25 | 2019-01-01 | 四川创客知佳科技有限公司 | A kind of environment-friendly composite material and preparation method thereof that can be degradable |
| WO2020132923A1 (en) * | 2018-12-26 | 2020-07-02 | 东莞正新包装制品有限公司 | Pe mulch film |
| CN112625414A (en) * | 2020-12-17 | 2021-04-09 | 北京易联结科技发展有限公司 | Seawater degradation composite material and preparation method thereof |
| CN112625414B (en) * | 2020-12-17 | 2022-06-21 | 北京易联结科技发展有限公司 | Seawater degradation composite material and preparation method thereof |
| CN114921073A (en) * | 2022-05-25 | 2022-08-19 | 上海大觉包装制品有限公司 | Degradable agricultural mulching film and preparation method thereof |
| CN114921073B (en) * | 2022-05-25 | 2024-03-26 | 上海大觉包装制品有限公司 | Degradable agricultural mulching film and preparation method thereof |
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