CN104804355A - Biodegradable agricultural liquid mulching film and preparation method thereof - Google Patents
Biodegradable agricultural liquid mulching film and preparation method thereof Download PDFInfo
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- CN104804355A CN104804355A CN201510026651.2A CN201510026651A CN104804355A CN 104804355 A CN104804355 A CN 104804355A CN 201510026651 A CN201510026651 A CN 201510026651A CN 104804355 A CN104804355 A CN 104804355A
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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 provides a biodegradable agricultural liquid mulching film and a preparation method thereof. The biodegradable agricultural liquid mulching film is mainly prepared from following ingredients, by mass, 100 to 150 parts of starch, 50 to 100 parts of protein powder, 130 to 300 parts of acrylic acid, 5 to 10 parts of ammonium hydroxide, 250 to 500 parts of 1% hydrochloric acid solution, 45 to 120 parts of sodium hydroxide, 3 to 6 parts of an initiator, 0.3 to 1.0 part of a cross-linking agent, and 0.05 to 0.15 part f a plasticizer. According to the preparation method, easily available and cheap reproducible natural high-molecular materials, such as starch and protein, are taken as the raw materials of the biodegradable agricultural liquid mulching film; oxidation, hydrolysis, and graft copolymerization with an appropriate amount of acrylic acid are adopted so as to prepare the biodegradable agricultural liquid mulching film; the biodegradable agricultural liquid mulching film possesses temperature increasing effect, soil moisture conservation effect, and seedling protection effect of conventional mulching film, and is capable of protecting soil structure, resisting water and wind erosion, preserving soil moisture and retaining water, adjusting ground temperature, increasing soil organic matter content, promoting crop growth, increasing yield, and improving quality; application is convenient; degradation is convenient to realize; and cost is low.
Description
Technical field
The invention belongs to biodegradable polymer field, particularly a kind of Biodegradable agricultural liquid-state mulch film and preparation method thereof.
Background technology
Modern agriculture, while obtaining great economic benefit, social benefit and ecological benefits, have also been changed the ecotope of soil, and its temperature, humidity, illumination, miniclimate etc. all there occurs wide variation.The decline of the soil fertility caused thus has caused the attention of more and more people.For this situation, there has been proposed culture underglass technology.It can improve farmland ecological protection effectively, promotes crop growth, improves output.At present, the covering material that farmland adopts mainly contains: plastic film, stalk and chemical insulating covering agent.But production practice have shown plastic film mulching sometimes because plant growth initial soil moisture and nutrient depletion are serious, and precipitation not easily penetrates in soil, the later stage there will be serious dehydration, de-fertile phenomenon, causes the underproduction.In addition, farmland incomplete film, except having impact to ecotope, also can affect soil physical and chemical property, hinders plant root growth, thus affects development of plants and cause the underproduction.Also there are some researches show, improving straw mulching ground temperature in early stage is low, and Water-saving effect is poor, the previous growth process of the crop that slows down, especially more outstanding on rabi.And also there is the problems such as consumption is large, cost is high, use is inconvenient in chemical insulating covering agent.So, newly emerged in large numbers a kind of new and high technology-can the liquid-state mulch film technology of natural degradation both at home and abroad.
Liquid-state mulch film is also known as liquid film on soil surface; belong to soil conditioner class, be a kind of high molecular filmogen, Zinc fractions granule can be promoted; improvement Soil structure, fixed table soil, protection topsoil, the general name suppressing moisture evaporation, prevent the macromolecular compound of water loss.It is the high-new soil protection technology of one newly emerged both at home and abroad.
Current liquid-state mulch film development is main raw material with petroleum polymer, and degradation cycle is longer, and spoiled soil structure after residual soil, has certain environmental risk.Therefore, develop new easy degradation liquid mulch film, and illustrate its application mechanism, one of focus that the person that become current research competitively studies.
Summary of the invention
The object of the present invention is to provide a kind of novel degradable agricultural liquid-state mulch film.This mulch film has good biodegradability, has to heat, preserve soil moisture, keep a full stand of seedings, and uses the convenient and feature of low production cost.Another object of the present invention is to provide a kind of preparation method of above-mentioned degradable agricultural liquid-state mulch film.The method green non-pollution, production technique is simple.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of Biodegradable agricultural liquid-state mulch film, component primarily of following masses part is prepared from: 100 ~ 150 parts of starch, 50 ~ 100 parts of protein powders, 130 ~ 300 parts of vinylformic acid, 5 ~ 10 parts of ammoniacal liquor, 250 ~ 500 part of 1% hydrochloric acid soln, 45 ~ 120 parts of sodium hydroxide, 3 ~ 6 parts of initiators, 0.3 ~ 1.0 part of linking agent, 0.05 ~ 0.15 part of softening agent.
Wherein, preferably, described initiator is persulphate.
Preferably, described linking agent is N,N methylene bis acrylamide.
Preferably, described softening agent is trolamine.
Prepare a method for Biodegradable agricultural liquid-state mulch film as claimed in claim 1, comprise the steps:
(1) starch activation: mixed with described 1% hydrochloric acid soln by described starch, in 60 ~ 90 DEG C of activation 0.5 ~ 2 hour, is then cooled to less than 30 DEG C;
(2) protein powder hydrolysis: mixed with water by described protein powder, adds described ammoniacal liquor in 65 ~ 75 DEG C of hydrolysis 3 ~ 6 hours, is then cooled to less than 30 DEG C;
(3), in and vinylformic acid: by soluble in water for described sodium hydroxide, adding described vinylformic acid, in ice-water bath, to carry out neutralization reaction to pH be 5-6;
(4) polyreaction: under whipped state, linking agent described in vinylformic acid neutralizer described in initiator described in 50-75%, 60-95% and 50-75% is added in described starch activation solution, remaining described initiator, described vinylformic acid neutralizer and described linking agent is added respectively, by above-mentioned two groups of mixed solutions respectively 50 ~ 70 DEG C of reactions 2 ~ 5 hours at described protein powder hydrolyzed solution;
(5) mixing after two kinds of products in (4) being cooled to less than 30 DEG C, then add described softening agent, in 80 ~ 90 DEG C of reactions 1 ~ 2 hour, after cooling, be Biodegradable agricultural liquid-state mulch film of the present invention.
Preferably, described ammoniacal liquor is the ammoniacal liquor of 1:1
Biodegradable agricultural liquid-state mulch film of the present invention adopts extensive cheapness, reproducible natural macromolecular material, as starch, protein etc. are for raw material is by oxidation, hydrolysis, the vinylformic acid that graft copolymerization is appropriate, prepare a kind of degradable agricultural liquid-state mulch film, this mulch film had both had heating of traditional mulch film, soil moisture conservation, the effect of keeping a full stand of seedings, there is again soil protection structure, resist water erosion wind erosion, soil moisture conservation retaining, regulate ground temperature, increase soil organic matter content, promote crop growthing development and improve output, the effects such as quality, it can improve ground temperature 3 ~ 5 DEG C, evaporation inhibiting rate more than 30%, soil moisture content improves more than 25%, degradation time is 90 days.Compared with prior art, beneficial effect of the present invention is: 1) adopt extensively cheap raw material, reduce production cost.2) take natural polymer as raw material, obtain mulch film by modification, there is good biological degradability.3) because its state is liquid, have the advantages that to be simple and easy to use, greatly reduce crop-planting cost of labor.
Embodiment
Below in conjunction with the embodiment in the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1
Sweet potato starch: 10.0g
Collagen powder: 5.0g
1% hydrochloric acid soln: 25ml
1:1 ammoniacal liquor: 0.5ml
Vinylformic acid: 13.0g
Sodium hydroxide: 4.5g
Initiator: ammonium persulphate: 0.36g
Linking agent: N,N methylene bis acrylamide: 0.03g
Softening agent: trolamine: 0.005g
Above-mentioned degradable agricultural liquid-state mulch film, adopts the method comprising following key step to obtain:
(1) activate: 10g starch is mixed with 25ml 1% hydrochloric acid soln, in 80 DEG C of activation 0.5 hour, be then cooled to less than 30 DEG C;
(2) be hydrolyzed: 5g protein powder is mixed with 45ml water, and adds 0.5ml 1:1 ammoniacal liquor, stirring heating 70 DEG C under condensing reflux, be hydrolyzed 4 hours, be then cooled to less than 30 DEG C;
(3) in and vinylformic acid: by soluble in water for sodium hydroxide 3.5g, add vinylformic acid 10g after dissolving completely in ice-water bath, to carry out neutralization reaction obtain A, by soluble in water for sodium hydroxide 1.0g, completely dissolve after add vinylformic acid 3g carry out in ice-water bath in and obtain B; The pH of A and B solution is between 5 to 6.
(4) polyreaction: under whipped state, vinylformic acid neutralization reaction liquid A, the N in initiator ammonium persulfate 0.24g, above-mentioned (3) step is added in solution after above-mentioned (1) step activates and lowers the temperature, N-methylene-bisacrylamide 0.02g, in 70 DEG C of reactions 4 hours; Under whipped state, vinylformic acid neutralization reaction liquid B, the N in initiator ammonium persulfate 0.12g, above-mentioned (3) step is added in solution after above-mentioned (2) one-step hydrolysis also cooling, N-methylene-bisacrylamide 0.01g, in 60 DEG C of reactions 3 hours;
(5) by after A, B two kinds of Product mixes of (4) step, under whipped state, add trolamine 0.0605g, and heat 1.5 hours at 85 DEG C, just degradable agricultural liquid-state mulch film is obtained after cooling, mix with certain proportion water after spraying, record average raising temperature 2 DEG C, keep moisture 20%.
Embodiment 2
Pea starch: 12.0g
Collagen powder: 10.0g
1% hydrochloric acid soln: 40ml
Vinylformic acid: 30.0g
1:1 ammoniacal liquor: 1ml
Sodium hydroxide: 12.0g
Initiator: ammonium persulphate: 0.52g
Linking agent: N,N methylene bis acrylamide: 0.052g
Softening agent: trolamine: 0.01g
Above-mentioned degradable agricultural liquid-state mulch film, adopts the method comprising following key step to obtain:
(1) activate: 12g starch is mixed with 40ml 1% hydrochloric acid soln, in 60 DEG C of activation 2 hours, be then cooled to less than 30 DEG C;
(2) be hydrolyzed: 10g protein powder is mixed with 90ml water, and adds 1ml 1:1 ammoniacal liquor, stirring heating 65 DEG C under condensing reflux, be hydrolyzed 6 hours, be then cooled to less than 30 DEG C;
(3), in and vinylformic acid: by soluble in water for sodium hydroxide 10.0g, add vinylformic acid 24g and in ice-water bath, carry out neutralization reaction obtain A, by soluble in water for sodium hydroxide 2.0g, add vinylformic acid 6g carry out in ice-water bath in and obtain B; The pH of A and B solution is between 5 to 6.
(4) polyreaction: under whipped state, vinylformic acid neutralization reaction liquid A, the N in initiator ammonium persulfate 0.28g, above-mentioned (3) step is added in solution after above-mentioned (1) step activates and lowers the temperature, N-methylene-bisacrylamide 0.028g, in 50 DEG C of reactions 5 hours;
(5) under whipped state, vinylformic acid neutralization reaction liquid B, the N in initiator ammonium persulfate 0.24g, above-mentioned (3) step is added in solution after above-mentioned (2) one-step hydrolysis also cooling, N-methylene-bisacrylamide 0.014g, in 65 DEG C of reactions 4 hours;
(6) by after A, B two kinds of Product mixes of (4) step, under whipped state, add trolamine 0.01g, and heat 2 hours at 80 DEG C, just degradable agricultural liquid-state mulch film is obtained after cooling, mix with certain proportion water after spraying, record average raising temperature 5 DEG C, keep moisture 30%.
Embodiment 3
Pea starch: 15.0g
Collagen powder: 7.0g
1% hydrochloric acid soln: 50ml
Vinylformic acid: 20.0g
1:1 ammoniacal liquor: 0.8ml
Sodium hydroxide: 7.0g
Initiator: ammonium persulphate: 0.53g
Linking agent: N,N methylene bis acrylamide: 0.06g
Softening agent: trolamine: 0.015g
Above-mentioned degradable agricultural liquid-state mulch film, adopts the method comprising following key step to obtain:
(1) activate: 15g starch is mixed with 50ml 1% hydrochloric acid soln, in 90 DEG C of activation 1 hour, be then cooled to less than 30 DEG C;
(2) be hydrolyzed: 7g protein powder is mixed with 65ml water, and adds 0.8ml 1:1 ammoniacal liquor, stirring heating 75 DEG C under condensing reflux, be hydrolyzed 3 hours, be then cooled to less than 30 DEG C;
(3), in and vinylformic acid: by soluble in water for sodium hydroxide 17.5g, add vinylformic acid 45g and in ice-water bath, carry out neutralization reaction obtain A, by water-soluble for sodium hydroxide 1.5g 8ml, add vinylformic acid 5g carry out in ice-water bath in and obtain B; The pH of A and B solution is between 5 to 6.
(4) polyreaction: under whipped state, vinylformic acid neutralization reaction liquid A, the N in initiator ammonium persulfate 0.36g, above-mentioned (3) step is added in solution after above-mentioned (1) step activates and lowers the temperature, N-methylene-bisacrylamide 0.045g, in 70 DEG C of reactions 4 hours;
(5) under whipped state, vinylformic acid neutralization reaction liquid B, the N,N methylene bis acrylamide 0.015g added in solution after above-mentioned (2) one-step hydrolysis also cooling in initiator ammonium persulfate 0.17g, above-mentioned (3) step reacts 2 hours in 70 DEG C;
(6) by after A, B two kinds of Product mixes of (4) step, under whipped state, add trolamine 0.015g, and heat 1 hour at 90 DEG C, just degradable agricultural liquid-state mulch film is obtained after cooling, mix with certain proportion water after spraying, record average raising temperature 4 DEG C, keep moisture 25%.
Above-mentioned embodiment is intended to illustrate that the present invention can be professional and technical personnel in the field and realizes or use; modifying to above-mentioned embodiment will be apparent for those skilled in the art; therefore the present invention includes but be not limited to above-mentioned embodiment; any these claims or specification sheets of meeting describes; meet and principle disclosed herein and novelty, the method for inventive features, technique, product, all fall within protection scope of the present invention.
Claims (6)
1. a Biodegradable agricultural liquid-state mulch film, it is characterized in that, component primarily of following masses part is prepared from: 100 ~ 150 parts of starch, 50 ~ 100 parts of protein powders, 130 ~ 300 parts of vinylformic acid, 5 ~ 10 parts of ammoniacal liquor, 250 ~ 500 part of 1% hydrochloric acid soln, 45 ~ 120 parts of sodium hydroxide, 3 ~ 6 parts of initiators, 0.3 ~ 1.0 part of linking agent, 0.05 ~ 0.15 part of softening agent.
2. the preparation method of Biodegradable agricultural liquid-state mulch film according to claim 2, is characterized in that, described initiator is persulphate.
3. the preparation method of Biodegradable agricultural liquid-state mulch film according to claim 2, is characterized in that, described linking agent is N,N methylene bis acrylamide.
4. the preparation method of Biodegradable agricultural liquid-state mulch film according to claim 2, is characterized in that, described softening agent is trolamine.
5. prepare a method for Biodegradable agricultural liquid-state mulch film as described in claim 1-4 any one, it is characterized in that, comprise the steps:
(1) starch activation: mixed with described 1% hydrochloric acid soln by described starch, in 60 ~ 90 DEG C of activation 0.5 ~ 2 hour, is then cooled to less than 30 DEG C;
(2) protein powder hydrolysis: mixed with water by described protein powder, adds described ammoniacal liquor in 65 ~ 75 DEG C of hydrolysis 3 ~ 6 hours, is then cooled to less than 30 DEG C;
(3), in and vinylformic acid: by soluble in water for described sodium hydroxide, adding described vinylformic acid, in ice-water bath, to carry out neutralization reaction to pH be 5-6;
(4) polyreaction: under whipped state, linking agent described in vinylformic acid neutralizer described in initiator described in 50-75%, 60-95% and 50-75% is added in described starch activation solution, remaining described initiator, described vinylformic acid neutralizer and described linking agent is added respectively, by above-mentioned two groups of mixed solutions respectively 50 ~ 70 DEG C of reactions 2 ~ 5 hours at described protein powder hydrolyzed solution;
(5) mixing after two kinds of products in (4) being cooled to less than 30 DEG C, then add described softening agent, in 80 ~ 90 DEG C of reactions 1 ~ 2 hour, after cooling, namely obtain described Biodegradable agricultural liquid-state mulch film.
6. the preparation method of Biodegradable agricultural liquid-state mulch film according to claim 5, is characterized in that, described ammoniacal liquor is the ammoniacal liquor of 1:1.
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| CN105294956A (en) * | 2015-10-30 | 2016-02-03 | 太仓市天合新材料科技有限公司 | Novel agricultural liquid film |
| CN106188647A (en) * | 2016-07-19 | 2016-12-07 | 仇颖超 | A kind of preparation method of complete biodegradable soil moisture conservation insulation liquid-state mulch film material |
| CN106700564A (en) * | 2015-08-12 | 2017-05-24 | 四川震鸿科技有限公司 | Multifunctional biodegradable environment-friendly liquid mulching film |
| CN109197283A (en) * | 2018-09-08 | 2019-01-15 | 佛山市森昂生物科技有限公司 | A kind of preparation method of degradable water conservation mulch |
| CN110563914A (en) * | 2019-09-06 | 2019-12-13 | 四川大学 | Preparation method of biomass high-capacity liquid base membrane |
| CN113046092A (en) * | 2021-03-23 | 2021-06-29 | 辽宁顺屹农业科技有限公司 | Powder full-biodegradable mulching film and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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Application publication date: 20150729 |