CN106243407A - A kind of degradable starch based agricultural mulching film adding bamboo fibre - Google Patents
A kind of degradable starch based agricultural mulching film adding bamboo fibre Download PDFInfo
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- CN106243407A CN106243407A CN201610601035.XA CN201610601035A CN106243407A CN 106243407 A CN106243407 A CN 106243407A CN 201610601035 A CN201610601035 A CN 201610601035A CN 106243407 A CN106243407 A CN 106243407A
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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
- C08L3/00—Compositions of starch, amylose or amylopectin or of their derivatives or degradation products
- C08L3/04—Starch derivatives, e.g. crosslinked derivatives
- C08L3/08—Ethers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B31/00—Preparation of derivatives of starch
- C08B31/003—Crosslinking of starch
- C08B31/006—Crosslinking of derivatives of starch
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B31/00—Preparation of derivatives of starch
- C08B31/08—Ethers
- C08B31/12—Ethers having alkyl or cycloalkyl radicals substituted by heteroatoms, e.g. hydroxyalkyl or carboxyalkyl starch
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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
- C08L2201/00—Properties
- C08L2201/06—Biodegradable
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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
- C08L2203/00—Applications
- C08L2203/16—Applications used for films
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biological Depolymerization Polymers (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Protection Of Plants (AREA)
Abstract
The invention discloses a kind of degradable starch based agricultural mulching film adding bamboo fibre, be made up of the raw material of following weight portion: butt corn starch 64 70, ethanol 23 26, chloroacetic acid 11 15, silica 14 16, epoxychloropropane 0.08 0.1, dimethylformamide 60 80, bamboo fibre 68, Sargassum polysaccharides 57, acrylic resin emulsion 56, sodium lauryl sulphate 0.3 0.4, epoxy castor oil 23, Cedar oil 35,85% ethanol solution is appropriate, deionized water is appropriate；Mulch film prepared by the present invention not only production process is simple, and stability is high, and filming performance is good, and it is pollution-free that mulch film can reach degradable, harmless to soil, it is possible to the effective anti-evil of insect protected, reduces the pesticide harm to soil, is worthy to be popularized.
Description
Technical field
The present invention relates to agricultural mulching technical field, particularly relate to a kind of degradable starch based agricultural mulching adding bamboo fibre
Film.
Background technology
At present, film-mulching technique is widely popularized in agricultural, be applied to Semen Tritici aestivi, Oryza sativa L., corn and soybean,
In the plantation of the crop such as Sorghum vulgare Pers., Cotton Gossypii, effect of increasing production is obvious, owing to the most a large amount of mulch films used are nondegradable macromolecules
Compound, neither by microbial attack, can not decompose voluntarily.If things go on like this, insoluble dirt will necessarily be brought to descendant
Dye harm.Therefore, research degradable mulch gradually comes into one's own.Starch is the Renewable resource that nature is abundant, its nontoxic nothing
Evil, fully biodegradable, but poor mechanical property and water resistance but limit its application.Its application is restricted.
Starch is a kind of Renewable resource, and not only wide material sources are cheap, and its goods in use have the feature of environmental protection of excellence
Can, can degrade rapidly after discarding, come from nature, back to nature.But, owing to starch is a kind of highly polar crystal material,
Intramolecular also exists substantial amounts of hydrogen bond with intermolecular, and under generic condition, thermoplasticity is poor, it is difficult to machine-shaping, and obtained product
Also exist that mechanical strength is low, poor water resistance and the shortcoming such as wet strength is low, therefore, how to improve the intensity of starch material, toughness and
Water proofing property is a urgent problem of the real substituted for plastic raw material of starch based full-biodegradable material energy.By to starch
Modification, starch granules expands, and structure changes, and degree of crystallinity reduces, and has certain molecular flexibility, and good film-forming property, with
The compatibility of macromolecule resin improves, and is so greatly improved the performance of starch mulch film so that it is range of application is wider.
In " research of hydrophobic modification starch/PVA biodegradable plastic mulch film " literary composition, author is former with corn starch
Material, through carboxymethyl etherification, the double modification of crosslinking, wherein etherification temperature is 74.44 DEG C, the molar ratio of sodium hydroxide/starch
1.85, etherification time 2.33h, concentration of alcohol is 84.65%, cross-linking modified during, use epoxychloropropane as cross-linking agent,
Consumption is 0.05%, and crosslinking time is 1.0h, and sodium hydroxide concentration is 1.5%, then obtains the cross-linking carboxymethyl that thermoplasticity is stronger
Starch, recycles it and is blended with PVA, and through crosslinking, speedup, hydrophobic modification, the mechanical property of film reaches standard-required, water suction
Rate is substantially reduced, but its combination property does not also reach actually used needs, needs its further modification is met various making
By demand, to improve the mechanical performance of starch film, toughness, intensity and other attributes, expand range of application.
Summary of the invention
The object of the invention is contemplated to make up the defect of prior art, it is provided that a kind of add the degradable starch-based of bamboo fibre
Agricultural mulching.
The present invention is achieved by the following technical solutions:
A kind of degradable starch based agricultural mulching film adding bamboo fibre, is made up of the raw material of following weight portion: butt Semen Maydis
Starch 64-70, ethanol 23-2 chloroacetic acid 11-15, silica 1 4-16, epoxychloropropane 0.08-0.1, dimethylformamide
60-80, bamboo fibre 6-8, Sargassum polysaccharides 5-7, acrylic resin emulsion 5-6, sodium lauryl sulphate 0.3-0.4, epoxy Semen Ricini
Oil 2-3, Cedar oil 3-5,85% ethanol solution is appropriate, deionized water is appropriate.
Described a kind of degradable starch based agricultural mulching film adding bamboo fibre, is made up of step in detail below:
(1) by the sodium hydroxide mix homogeneously of butt corn starch and 6-10 times amount, forwarding to stir in reactor, rotating speed is 80-
100r/min, at 35 DEG C, stirring reaction 30min, after ethanol solution and chloroacetic acid mix homogeneously, is sprayed on starch surface and continues
Continuous stirring 10min, after reaction terminates, is cooled to room temperature, then washs above-mentioned modified starch with 85% ethanol solution and adds appropriate
Glacial acetic acid, regulation pH is 7.0, sucking filtration, continues to wash filter cake 2-3 time with 85% ethanol water, then in blast drier 50
It is dried 2-3h at DEG C, pulverizes, be sieving through 100 mesh, obtain carboxymethyl starch；
(2) carboxymethyl starch prepared by step (1) is added to furnishing slurry in alkaline solution, alkaline solution and carboxymethyl starch press
Mix than ml:g1.5-2:1 according to volume mass, be subsequently placed in the thermostat water bath of 70-80 DEG C and be stirred continuously, by epoxy chloropropionate
Alkane is dissolved in appropriate alkaline liquor, all instills in starch milk, react 1-3h, use hydrochloric acid conditioning solution after completion of the reaction in 3-5min
Ph value to 6-7, stand a period of time, washing, sucking filtration, be placed in drying baker at 55 DEG C of dry 4h, prepare cross-linking carboxymethyl and form sediment
Powder；
(3) it is dried at 80-100 DEG C after bamboo fibre being rinsed in water to constant weight, the mixing of Sargassum polysaccharides deionized water is joined
Being set to concentration is 5-8g/L, stirs to adding sodium lauryl sulphate and polypropylene emulsion after being completely dissolved, with 800-1200 turn/
Point rotating speed stir to being uniformly dispersed, then bamboo fibre is impregnated in above-mentioned mixed solution, is placed in vacuum drying oven at 80 DEG C
It is dried, naturally cools to room temperature；
(4) product prepared by step (2) is configured to the starch milk that concentration is 38-48g/L, adds product prepared by step (3)
Stirring 30-40min at 95-100 DEG C, stirring adds remaining surplus materials and continues stirring 50-60min after terminating, then will mixing
Emulsion is transferred to homogenizer 18000r/min homogenizing 5min, forms uniform film forming liquid, then by film forming liquid in 0.09MPa vacuum
Deaerate under degree 20min, casting film-forming.
Described a kind of degradable starch based agricultural mulching film adding bamboo fibre, described alkaline solution is by sodium hydroxide and chlorine
Change sodium to mix according to mass ratio 2-3:1, be then uniformly mixing to obtain with the deionized water dissolving of gross weight 3-4 times amount.
The invention have the advantage that the present invention utilizes corn starch for raw material, through carboxymethyl etherification, the double modification of crosslinking, make
Obtaining modified corn starch, greatly add the surface group of starch, the chemical bonding effect that intermolecular existence is strong, to flowing
The viscous drag produced increases, and apparent viscosity rises, and hinders rearranging and associating between straight chain molecule in gelatinized corn starch, increases
The water-retaining property of starch low temperature disperse system, greatly reduces retrogradation and gel tendency, and improves light transmittance and reduce parent
Aqueous, meets the crops requirement to illumination, and improves Optimality and the stability of film forming, and polysaccharide has special
Long-chain helical molecular structure, stable chemical nature, filming performance is preferable, and gas barrier property is the most excellent, and moisture barrier property is poor, utilizes bamboo fine
Tie up the enhancing phase as film forming, be greatly improved mechanical property and the tensile strength of starch film, also reduce the production of mulch film
Cost, and also there is excellent uvioresistant, effect of antibacterial mite-removing, the letter of mulch film prepared by the present invention not only production process
Single, stability is high, and filming performance is good, and it is pollution-free that mulch film can reach degradable, harmless to soil, it is possible to the effective anti-evil of insect protected,
Reduce the pesticide harm to soil, be worthy to be popularized.
Detailed description of the invention
A kind of degradable starch based agricultural mulching film adding bamboo fibre, is prepared system by the raw material of following weight portion (kilogram)
Become: butt corn starch 64, ethanol 23, chloroacetic acid 11, silica 14, epoxychloropropane 0.08, dimethylformamide 60,
Bamboo fibre 6, Sargassum polysaccharides 5, acrylic resin emulsion 5, sodium lauryl sulphate 0.3, epoxy castor oil 2, Cedar oil 3,85% second
Alcoholic solution is appropriate, deionized water is appropriate.
Described a kind of degradable starch based agricultural mulching film adding bamboo fibre, is made up of step in detail below:
(1) by the sodium hydroxide mix homogeneously of butt corn starch and 6 times amount, forwarding to stir in reactor, rotating speed is 80r/
Min, stirring reaction 30min at 35 DEG C, after ethanol solution and chloroacetic acid mix homogeneously, be sprayed on starch surface and continue stirring
10min, after reaction terminates, is cooled to room temperature, then washs above-mentioned modified starch with 85% ethanol solution and adds appropriate ice vinegar
Acid, regulation pH is 7.0, sucking filtration, continues to wash filter cake 2 times with 85% ethanol water, then dry at 50 DEG C in blast drier
Dry 2h, pulverizes, is sieving through 100 mesh, obtain carboxymethyl starch；
(2) carboxymethyl starch prepared by step (1) is added to furnishing slurry in alkaline solution, alkaline solution and carboxymethyl starch press
Mix than ml:g1.5:1 according to volume mass, be subsequently placed in the thermostat water bath of 70 DEG C and be stirred continuously, epoxychloropropane is dissolved
In appropriate alkaline liquor, all instill in starch milk in 3min, react 1h, after completion of the reaction by the ph value of hydrochloric acid conditioning solution to 6,
Stand a period of time, washing, sucking filtration, it is placed in drying baker at 55 DEG C of dry 4h, prepares crosslinked carboxymethyl fecula；
(3) it is dried at 80 DEG C to constant weight after bamboo fibre being rinsed in water, Sargassum polysaccharides deionized water is mixedly configured into
Concentration is 5g/L, stirs and adds sodium lauryl sulphate and polypropylene emulsion after being completely dissolved, stirs with the rotating speed of 800 revs/min
Mix to being uniformly dispersed, then bamboo fibre is impregnated in above-mentioned mixed solution, be placed in vacuum drying oven and be dried at 80 DEG C, the coldest
But to room temperature；
(4) product prepared by step (2) being configured to the starch milk that concentration is 38g/L, product prepared by addition step (3) is 95
Stirring 30min at DEG C, stirring adds remaining surplus materials and continues stirring 50min after terminating, then mixed emulsion is transferred to homogenizing
Device 18000r/min homogenizing 5min, forms uniform film forming liquid, and then deaerate under 0.09MPa vacuum 20min by film forming liquid,
Casting film-forming.
Described a kind of degradable starch based agricultural mulching film adding bamboo fibre, described alkaline solution is by sodium hydroxide and chlorine
Change sodium to mix according to mass ratio 2:1, be then uniformly mixing to obtain with the deionized water dissolving of gross weight 3 times amount.
Preparing starch film according to the method for embodiment, it is carried out performance test, result is as follows:
Tensile strength (MPa): 57.2；Elongation at break (%): 330%；Light transmittance (600nm, %): 75.8；Moisture-vapor transmission
(g.cm.cm-2.s-1.Pa-1): 1.82 × 10-12；Water absorption rate (%): 5.6.
Claims (3)
1. the degradable starch based agricultural mulching film adding bamboo fibre, it is characterised in that prepared by the raw material of following weight portion
Make: butt corn starch 64-70, ethanol 23-26, chloroacetic acid 11-15, silica 1 4-16, epoxychloropropane 0.08-
0.1, dimethylformamide 60-80, bamboo fibre 6-8, Sargassum polysaccharides 5-7, acrylic resin emulsion 5-6, sodium lauryl sulphate
0.3-0.4, epoxy castor oil 2-3, Cedar oil 3-5,85% ethanol solution is appropriate, deionized water is appropriate.
A kind of degradable starch based agricultural mulching film adding bamboo fibre, it is characterised in that by following
Concrete steps are made:
(1) by the sodium hydroxide mix homogeneously of butt corn starch and 6-10 times amount, forwarding to stir in reactor, rotating speed is 80-
100r/min, at 35 DEG C, stirring reaction 30min, after ethanol solution and chloroacetic acid mix homogeneously, is sprayed on starch surface and continues
Continuous stirring 10min, after reaction terminates, is cooled to room temperature, then washs above-mentioned modified starch with 85% ethanol solution and adds appropriate
Glacial acetic acid, regulation pH is 7.0, sucking filtration, continues to wash filter cake 2-3 time with 85% ethanol water, then in blast drier 50
It is dried 2-3h at DEG C, pulverizes, be sieving through 100 mesh, obtain carboxymethyl starch；
(2) carboxymethyl starch prepared by step (1) is added to furnishing slurry in alkaline solution, alkaline solution and carboxymethyl starch press
Mix than ml:g1.5-2:1 according to volume mass, be subsequently placed in the thermostat water bath of 70-80 DEG C and be stirred continuously, by epoxy chloropropionate
Alkane is dissolved in appropriate alkaline liquor, all instills in starch milk, react 1-3h, use hydrochloric acid conditioning solution after completion of the reaction in 3-5min
Ph value to 6-7, stand a period of time, washing, sucking filtration, be placed in drying baker at 55 DEG C of dry 4h, prepare cross-linking carboxymethyl and form sediment
Powder；
(3) it is dried at 80-100 DEG C after bamboo fibre being rinsed in water to constant weight, the mixing of Sargassum polysaccharides deionized water is joined
Being set to concentration is 5-8g/L, stirs to adding sodium lauryl sulphate and polypropylene emulsion after being completely dissolved, with 800-1200 turn/
Point rotating speed stir to being uniformly dispersed, then bamboo fibre is impregnated in above-mentioned mixed solution, is placed in vacuum drying oven at 80 DEG C
It is dried, naturally cools to room temperature；
(4) product prepared by step (2) is configured to the starch milk that concentration is 38-48g/L, adds product prepared by step (3)
Stirring 30-40min at 95-100 DEG C, stirring adds remaining surplus materials and continues stirring 50-60min after terminating, then will mixing
Emulsion is transferred to homogenizer 18000r/min homogenizing 5min, forms uniform film forming liquid, then by film forming liquid in 0.09MPa vacuum
Deaerate under degree 20min, casting film-forming.
A kind of degradable starch based agricultural mulching film adding bamboo fibre, it is characterised in that described alkali
Property solution be to be mixed according to mass ratio 2-3:1 by sodium hydroxide and sodium chloride, then water-soluble with the deionization of gross weight 3-4 times amount
Solution is uniformly mixing to obtain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610601035.XA CN106243407A (en) | 2016-07-28 | 2016-07-28 | A kind of degradable starch based agricultural mulching film adding bamboo fibre |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610601035.XA CN106243407A (en) | 2016-07-28 | 2016-07-28 | A kind of degradable starch based agricultural mulching film adding bamboo fibre |
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| CN106243407A true CN106243407A (en) | 2016-12-21 |
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| CN201610601035.XA Withdrawn CN106243407A (en) | 2016-07-28 | 2016-07-28 | A kind of degradable starch based agricultural mulching film adding bamboo fibre |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114644772A (en) * | 2020-12-18 | 2022-06-21 | 湖南登科材料科技有限公司 | Degradable salivation film produced by using plant starch and preparation method thereof |
| CN115572511A (en) * | 2022-10-11 | 2023-01-06 | 宝鸡文理学院 | Fruit bag-free film solution with controllable decomposition time and application thereof |
| CN116178799A (en) * | 2022-12-14 | 2023-05-30 | 衢州学院 | Bamboo fiber molding reinforced material and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104098781A (en) * | 2014-06-20 | 2014-10-15 | 华中农业大学 | Method utilizing tabasheer waste to produce degradable liquid mulching film |
| CN104292479A (en) * | 2014-09-28 | 2015-01-21 | 广西大学 | Preparation method of potato starch-based degradable plastic film |
-
2016
- 2016-07-28 CN CN201610601035.XA patent/CN106243407A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104098781A (en) * | 2014-06-20 | 2014-10-15 | 华中农业大学 | Method utilizing tabasheer waste to produce degradable liquid mulching film |
| CN104292479A (en) * | 2014-09-28 | 2015-01-21 | 广西大学 | Preparation method of potato starch-based degradable plastic film |
Non-Patent Citations (1)
| Title |
|---|
| 闫美珍: ""疏水化改性淀粉/PVA生物降解塑料地膜的研究"", 《中国优秀硕士学位论文全文数据库 农业科技辑》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114644772A (en) * | 2020-12-18 | 2022-06-21 | 湖南登科材料科技有限公司 | Degradable salivation film produced by using plant starch and preparation method thereof |
| CN115572511A (en) * | 2022-10-11 | 2023-01-06 | 宝鸡文理学院 | Fruit bag-free film solution with controllable decomposition time and application thereof |
| CN116178799A (en) * | 2022-12-14 | 2023-05-30 | 衢州学院 | Bamboo fiber molding reinforced material and preparation method thereof |
| CN116178799B (en) * | 2022-12-14 | 2024-02-27 | 衢州学院 | Bamboo fiber molding reinforced material and preparation method thereof |
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