CN106117625A - A kind of Biodegradable agricultural mulch film with insect-pest effect - Google Patents
A kind of Biodegradable agricultural mulch film with insect-pest effect Download PDFInfo
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- CN106117625A CN106117625A CN201610590304.7A CN201610590304A CN106117625A CN 106117625 A CN106117625 A CN 106117625A CN 201610590304 A CN201610590304 A CN 201610590304A CN 106117625 A CN106117625 A CN 106117625A
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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
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G13/00—Protecting plants
- A01G13/02—Protective coverings for plants; Coverings for the ground; Devices for laying-out or removing coverings
- A01G13/0256—Ground coverings
- A01G13/0268—Mats or sheets, e.g. nets or fabrics
- A01G13/0275—Films
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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
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2303/00—Characterised by the use of starch, amylose or amylopectin or of their derivatives or degradation products
- C08J2303/04—Starch derivatives
- C08J2303/08—Ethers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2401/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
- C08J2401/08—Cellulose derivatives
- C08J2401/26—Cellulose ethers
- C08J2401/28—Alkyl ethers
-
- 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
-
- 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
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- Manufacturing & Machinery (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Environmental Sciences (AREA)
- Biological Depolymerization Polymers (AREA)
Abstract
The invention discloses a kind of Biodegradable agricultural mulch film with insect-pest effect, 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, aluminium stearate 34, carboxymethyl cellulose 23, Borax 23, tannic acid 12, mannitol 34, paraffin oil 34, matrine 68,85% ethanol solution is appropriate, deionized water is appropriate；The biodegradation agricultural mulching that the present invention provides, material prescription is simple, and cost of material is low, can cost-effective with reduce in the case of labour force, reach to promote the effect of crop growth, the anti-evil of insect protected, promote volume increase, and degradable is nontoxic 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 Biodegradable agricultural with insect-pest effect
Mulch 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 have can biological dropping of insect-pest effect
Solve agricultural mulching.
The present invention is achieved by the following technical solutions:
A kind of Biodegradable agricultural mulch film with insect-pest effect, is made up of the raw material of following weight portion: butt is beautiful
Rice starch 64-70, ethanol 23-2 chloroacetic acid 11-15, silica 1 4-16, epoxychloropropane 0.08-0.1, dimethyl formyl
Amine 60-80, aluminium stearate 3-4, carboxymethyl cellulose 2-3, Borax 2-3, tannic acid 1-2, mannitol 3-4, paraffin oil 3-4, hardship
Join alkali 6-8,85% ethanol solution is appropriate, deionized water is appropriate.
Described a kind of Biodegradable agricultural mulch film with insect-pest effect, 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) matrine is cleaned surface impurity post-drying and is ground into powder, according to mass ratio 1:(20-25) add 75% ethanol water
Solution soaking 24h, is heated to reflux 3-5h under stirring condition, filter, and reclaims filtrate, adds carboxymethyl when filtrate is reduced to room temperature
Cellulose, Borax and tannic acid, then heating liter high-temperature concentration mixed liquor is to the 1/3 of original volume, standby after natural cooling；
(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 Biodegradable agricultural mulch film with insect-pest effect, described alkaline solution be by sodium hydroxide and
Sodium chloride mixes according to mass ratio 2-3:1, is 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 Radix Sophorae Flavescentis
The characteristic of itself parasite killing, bactericidal activity and coordinate plant growth function of alkali is as gelatinized corn starch reinforcing agent, the carboxymethyl of interpolation
Fiber can improve matrine dispersibility in gelatinized corn starch so that it is performance that can be excellent, improves the insect-pest of starch film, kills
Bacterium performance, expands application, the biodegradation agricultural mulching that the present invention provides, and material prescription is simple, and cost of material is low, it is possible to
Cost-effective with reduce in the case of labour force, reach to promote the effect of crop growth, the anti-evil of insect protected, promote volume increase, and
And degradable is nontoxic to soil, is worthy to be popularized.
Detailed description of the invention
A kind of Biodegradable agricultural mulch film with insect-pest effect, 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,
Aluminium stearate 3, carboxymethyl cellulose 2, Borax 2, tannic acid 1, mannitol 3, paraffin oil 3, matrine 6,85% ethanol solution are suitable
Amount, deionized water are appropriate.
Described a kind of Biodegradable agricultural mulch film with insect-pest effect, 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) matrine is cleaned surface impurity post-drying and is ground into powder, according to mass ratio 1:(20) add 75% ethanol water
Soak 24h, under stirring condition, be heated to reflux 3h, filter, reclaim filtrate, when filtrate is reduced to room temperature, add carboxymethyl cellulose
Element, Borax and tannic acid, then heating liter high-temperature concentration mixed liquor is to the 1/3 of original volume, standby after natural cooling；
(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 Biodegradable agricultural mulch film with insect-pest effect, described alkaline solution be by sodium hydroxide and
Sodium chloride mixes according to mass ratio 2:1, is 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): 54.1；Elongation at break (%): 337%；Light transmittance (600nm, %): 80.8；Water vapour permeability
(g.cm.cm-2.s-1.Pa-1): 1.82 × 10-12；Water absorption rate (%): 5.2.
Claims (3)
1. a Biodegradable agricultural mulch film with insect-pest effect, it is characterised in that by the raw material system of following weight portion
Prepare into: butt corn starch 64-70, ethanol 23-26, chloroacetic acid 11-15, silica 1 4-16, epoxychloropropane
0.08-0.1, dimethylformamide 60-80, aluminium stearate 3-4, carboxymethyl cellulose 2-3, Borax 2-3, tannic acid 1-2, manna
Alcohol 3-4, paraffin oil 3-4, matrine 6-8,85% ethanol solution is appropriate, deionized water is appropriate.
A kind of Biodegradable agricultural mulch film with insect-pest effect, it is characterised in that by with
Lower 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) matrine is cleaned surface impurity post-drying and is ground into powder, according to mass ratio 1:(20-25) add 75% ethanol water
Solution soaking 24h, is heated to reflux 3-5h under stirring condition, filter, and reclaims filtrate, adds carboxymethyl when filtrate is reduced to room temperature
Cellulose, Borax and tannic acid, then heating liter high-temperature concentration mixed liquor is to the 1/3 of original volume, standby after natural cooling；
(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 Biodegradable agricultural mulch film with insect-pest effect, it is characterised in that described
Alkaline solution is to be mixed according to mass ratio 2-3:1 by sodium hydroxide and sodium chloride, then with the deionized water of gross weight 3-4 times amount
Dissolving is uniformly mixing to obtain.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610590304.7A CN106117625A (en) | 2016-07-25 | 2016-07-25 | A kind of Biodegradable agricultural mulch film with insect-pest effect |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610590304.7A CN106117625A (en) | 2016-07-25 | 2016-07-25 | A kind of Biodegradable agricultural mulch film with insect-pest effect |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106751617A (en) * | 2016-12-21 | 2017-05-31 | 淮南市润吉生态农业有限公司 | A kind of biodegradable lentinus edodes strain stick exempts to cut water-retaining film and preparation method thereof |
| CN106982864A (en) * | 2017-03-24 | 2017-07-28 | 孙志廷 | A kind of biodegradable agricultural mulching of load matrine and preparation method thereof |
| CN109362435A (en) * | 2018-09-26 | 2019-02-22 | 浙江德裕科技有限公司 | A kind of insect prevention anti-grass cloth |
| CN113788989A (en) * | 2021-09-13 | 2021-12-14 | 桂林理工大学 | Starch-based nano composite material with ultraviolet shielding function and preparation method thereof |
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| CN104098781A (en) * | 2014-06-20 | 2014-10-15 | 华中农业大学 | Method utilizing tabasheer waste to produce degradable liquid mulching film |
| CN104861402A (en) * | 2015-05-13 | 2015-08-26 | 常州龙骏天纯环保科技有限公司 | Completely biodegradatable agricultural mulching film and preparation method thereof |
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2016
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|---|---|---|---|---|
| CN104098781A (en) * | 2014-06-20 | 2014-10-15 | 华中农业大学 | Method utilizing tabasheer waste to produce degradable liquid mulching film |
| CN104861402A (en) * | 2015-05-13 | 2015-08-26 | 常州龙骏天纯环保科技有限公司 | Completely biodegradatable agricultural mulching film and preparation method thereof |
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| 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 |
|---|---|---|---|---|
| CN106751617A (en) * | 2016-12-21 | 2017-05-31 | 淮南市润吉生态农业有限公司 | A kind of biodegradable lentinus edodes strain stick exempts to cut water-retaining film and preparation method thereof |
| CN106982864A (en) * | 2017-03-24 | 2017-07-28 | 孙志廷 | A kind of biodegradable agricultural mulching of load matrine and preparation method thereof |
| CN109362435A (en) * | 2018-09-26 | 2019-02-22 | 浙江德裕科技有限公司 | A kind of insect prevention anti-grass cloth |
| CN113788989A (en) * | 2021-09-13 | 2021-12-14 | 桂林理工大学 | Starch-based nano composite material with ultraviolet shielding function and preparation method thereof |
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