CN107418170A - A kind of preparation method of degradable preserving soil moisture agricultural mulching - Google Patents

A kind of preparation method of degradable preserving soil moisture agricultural mulching Download PDF

Info

Publication number
CN107418170A
CN107418170A CN201710700737.8A CN201710700737A CN107418170A CN 107418170 A CN107418170 A CN 107418170A CN 201710700737 A CN201710700737 A CN 201710700737A CN 107418170 A CN107418170 A CN 107418170A
Authority
CN
China
Prior art keywords
parts
preparation
degradable
soil moisture
agricultural mulching
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201710700737.8A
Other languages
Chinese (zh)
Other versions
CN107418170B (en
Inventor
吴卓轩
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN201710700737.8A priority Critical patent/CN107418170B/en
Publication of CN107418170A publication Critical patent/CN107418170A/en
Application granted granted Critical
Publication of CN107418170B publication Critical patent/CN107418170B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
    • 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
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
    • C05D9/00—Other inorganic fertilisers
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
    • 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
    • C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
    • C08J2367/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
    • 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
    • C08J2401/02—Cellulose; Modified cellulose
    • 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
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2429/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
    • C08J2429/02—Homopolymers or copolymers of unsaturated alcohols
    • C08J2429/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
    • 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
    • C08J2473/00—Characterised by the use of macromolecular compounds obtained by reactions forming a linkage containing oxygen or oxygen and carbon in the main chain, not provided for in groups C08J2459/00 - C08J2471/00; Derivatives of such polymers
    • C08J2473/02—Polyanhydrides
    • 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
    • C08J2497/00—Characterised by the use of lignin-containing materials
    • C08J2497/02—Lignocellulosic material, e.g. wood, straw or bagasse
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/002—Physical properties
    • C08K2201/003—Additives being defined by their diameter
    • 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
    • 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
    • C08L2312/00—Crosslinking

Abstract

The invention belongs to agricultural film technical field, discloses a kind of preparation method of degradable preserving soil moisture agricultural mulching.The raw material of agricultural mulching includes according to parts by weight：20~40 parts of polyhydroxyalkanoatecopolymers copolymers, fatty 8~15 parts of ester polycondensate, 20~30 parts of marine algae extract, 100~150 parts of n-hexane, 30~40 parts of gumbo straw leaf powder, 5~10 parts of corn stigma, modified 3~5 parts of clay powder, 10~15 parts of film forming agent, 5~12 parts of crosslinking agent, 3~5 parts of sensitising agent, 8~15 parts of optional function additive.The mulch film of the present invention is good in the film-formation result of earth's surface and speed is fast, can automatic degradable, there is soil moisture conservation, heats, and there is improvement soil texture, increase the function of soil fertility.

Description

A kind of preparation method of degradable preserving soil moisture agricultural mulching
Technical field:
The invention belongs to agricultural film preparing technical field, is related to a kind of preparation method of mulch film spray, particularly a kind of complete The preparation method of degraded preserving soil moisture film, the agricultural mulching prepared can be used in agricultural applications to be adjusted to soil moisture content And protection, improve Crop development ability.
Background technology:
It can meet crops insulation, soil moisture conservation using mulch film, keep fertility to reach the needs of increasing both production and income and pushed away extensively Wide application, have become an important technology of agricultural volume increase.But because current most of mulch films are polyethylene or polyvinyl chloride, Its stability is high, and degradation process is relatively slow, has resulted in serious white pollution.To solve this problem, in development in science and technology Promotion under, progressively develop a variety of degradable mulch, mainly with humic acid, emulsified asphalt, polyvinyl alcohol, polyacrylate and One or more in its polymer are primary raw material, as Chinese patent CN102533276A is disclosed with montmorillonite, humic acid Degradable liquid-state mulch film is produced, humic acid solves pollution of the mulch film to Land Environment as primary raw material；Chinese patent Multifunction degradable black liquid state mulch film disclosed in CN1277228A mainly using asphalt or residual oil as raw material, cost compared with Height, for raw material sources by a definite limitation, meeting hard water when the material dilutes in addition and be easily emulsified causes film forming to reduce；It is Chinese special Sharp CN1935878A discloses the mixed solution that a kind of multifunction degradable mulch film is polyvinyl alcohol, acrylic acid, starch, the two Cost is higher, and degradability is poor.Chinese patent CN105503482A discloses a kind of marine alga liquid fertilizer mulch film powder, is extracted with marine alga Powder is primary raw material, coordinates polyvinyl alcohol, hydroxymethyl cellulose, silk-fibroin powder, oxygenation agent and inorganic fertilizer particle, is made degradable Mulch film, but marine alga extract powder be present and make complicated, marine alga is long, anti-as the film formation time that primary raw material single use is brought The problem of opening insufficient strength.
Development can completely degraded plastic film can preferably solve the problems, such as Plastic-film pollution.However, of the prior art drop Solution mulch film avoids " white pollution " to a certain extent, but generally existing film formation time is long, film-formation result is poor, it is impossible to drop completely The shortcomings of solution, to using and promoting with certain limitation, therefore, therefore design is a kind of can to overcome drawbacks described above, if Count a kind of preparation method for the degradable preserving soil moisture agricultural mulching that can overcome drawbacks described above.
The content of the invention:
It is an object of the invention in view of the above-mentioned problems, providing a kind of preparation side of degradable preserving soil moisture agricultural mulching Method, it is good in the film-formation result of earth's surface and speed is fast, can automatic degradable, there is soil moisture conservation, heat, and with improving soil Earth structure, increase the function of soil fertility.
To achieve these goals, it is described the present invention relates to a kind of preparation method of degradable preserving soil moisture agricultural mulching The raw material of agricultural mulching includes according to parts by weight：20~40 parts of polyhydroxyalkanoatecopolymers copolymers, fatty ester polycondensate 8~ 15 parts, 20~30 parts of marine algae extract, 100~150 parts of n-hexane, 30~40 parts of gumbo straw leaf powder, 5~10 parts of corn stigma, change 3~5 parts of clay powder of property, 10~15 parts of film forming agent, 5~12 parts of crosslinking agent, 3~5 parts of sensitising agent, optional function additive 8~15 Part；
The step of preparation process of the agricultural mulching includes：
(1) preparation of marine algae extract：By new fresh seaweed or immersion after dry seaweed clean it is standby, using Mechanical Crushing It is added to after into tiny particle in reaction unit, adds water and ethanol, be beaten in the lump, obtains being beaten liquid A, in ultrasound Processing mashing liquid A20~40 minute under the conditions of ripple, the supersonic frequency are 60~90Hz, and treatment temperature is 20~50 DEG C, has been beaten AEO is added after slurry, is soaked 12~48 hours at 20~45 DEG C, it is organic that low-temp low-pressure is distilled to recover part Solvent, vapo(u)rizing temperature are 45~65 DEG C, and distillation pressure is -0.5~-1.2MPa, and press filtration obtains marine alga slag and filtrate, filter press choosing It is 800~4500 mesh with filter cloth aperture, the filtrate is marine algae extract；
Wherein the mass ratio of marine alga particle, water, ethanol and AEO is 5~30:10~85:10~85: 0.01~0.1；
(2) preparation of gumbo straw leaf powder：The gumbo straw leaf at florescence, naturally dry are taken, classification grinding is less than 150 mesh into fineness Powder；
(3) processing of corn stigma：The whisker on the corn ear of autumn harvesting, naturally dry are taken, clipping is less than 1mm into length Particle section shape；
(4) modification of clay powder：Clay powder and ammoniacal liquor, silane resin acceptor kh-550 are pressed 1:3~5:0.2~0.8 weight Amount soaks 2~5h, 3~5h of reprecipitation in the presence of stirring, takes lower sediment thing, naturally dry, be ground into than sealing mixing Fineness, which is less than 150 mesh powders, must be modified clay powder, and wherein ammoniacal liquor can reuse；
(5) preparation of mulch film：Polyhydroxyalkanoatecopolymers copolymers and fatty ester polycondensate are dissolved in n-hexane first It is well mixed, marine algae extract, gumbo straw leaf powder, corn stigma and modified clay powder are added, is uniformly mixed, then adds into Film, crosslinking agent, sensitising agent and optional function additive are quickly well mixed, and are incubated 10~120 minutes, are obtained mixture B, most Mixture B is added in the water of its 10~14 times of quality afterwards and is stirred, soil surface is sprayed to after stirring and forms ground Film.
Polyhydroxyalkanoatecopolymers copolymers of the present invention can be biodegradable, is about 50 comprising mol ratio:Two kinds of 50 Random repeated monomer unit；Wherein the first random repeated monomer unit has the structure of formula (I)：
In formula：R1It is H, or C1~C3Alkyl, and n is 1 or 2；
Second of random repeated monomer unit has the structure of formula (II)：
In formula：R2It is H, or C3~C19Alkyl or C3~C19Alkenyl, and m is 2 to 16.
The polyhydroxyalkanoatefrom that the present invention uses preferably passes through fermentation or the green by transgenosis by biologic artifact Plant obtains；Preferably, the number-average molecular weight of polyhydroxyalkanoatecopolymers copolymers is more than 250,000 grams/mol, in film forming mistake There is excellent stretch modulus and fracture toughness in journey.
Fatty ester polycondensate of the present invention is synthesized by 1, 4- succinic acid and butanedioic acid or its acid anhydrides, or Isosorbide-5-Nitrae-fourth two Acid, butanedioic acid or its acid anhydrides and adipic acid synthesis.
Film forming agent of the present invention is polyvinyl alcohol or Propiram glue；The crosslinking agent is N,N methylene bis acrylamide Or carboxymethyl cellulose；The sensitising agent is N, N- dibutyl dithiocaarbamates iron, aminodithioformic acid nickel, hexichol first One or more in ketone or ethylene methacrylic ketone；The function additive be herbicide, bactericide, micro- fertilizer, foaming agent, antifreezing agent or One kind or its combination in aeroge.
Polyhydroxyalkanoatefrom of the present invention generally crystallize it is relatively slow, with the process velocity difference of other components compared with Product is adversely affected greatly, to avoid the inherence of polyhydroxyalkanoatefrom from crystallizing slow problem, fatty ester polycondensate The crystallization of polyhydroxyalkanoatefrom in blend is helped speed up, this is due to that the ester polycondensate partially crystallizable of blend accelerates Crystallization with polyhydroxyalkanoatefrom part accelerates coefficient result, therefore, it is possible to reach film forming with faster speed Requirement, obtain beneficial effect on the whole.
Marine alga of the present invention includes Enteromorpha and sea-tangle, the extracting method being combined using water and organic solvent, first Using the action breaks down seaweed plants cell of ultrasound, solvent penetration is set then to add AEO conduct to wherein Bleeding agent is moistened, can quickly dissolve the diaphragm of marine alga at normal temperatures and pressures, reaches the purpose of rapid extraction；Marine alga and its carry Many inorganic nutrients and natural film forming ingredients necessary to containing plant growth in liquid are taken, and contain abundant amine, indoles Plant growth substances such as class compound and to other physiological activators, and marine alga medicine class etc., one of composition as mulch film, Viscoplasticity, film forming and the moisture retention of mulch film can not only be made good, be alternatively arranged as fertilizer, agricultural chemicals, plant growth regulator etc..
It is of the present invention to be dispersed in by modified clay powder in mulch film, the work of enhancing ground film dynamic performance can be played With, while can be good at adsorption function auxiliary agent, make mulch film more stable, function additive can be penetrated into soil after sprinkling, more The respective action of good performance fusion soil.
Treated gumbo straw leaf powder and corn stigma of the present invention be soil moisture conservation, heating effect liquid-state mulch film it is viscous Covering material is closed, with property stabilization, emulsion dispersion is good, viscosity is big and degradable characteristic, and fiber is played in film forming procedure And coagulation, it can be degenerated after degraded and be decomposed into humic acid, there is the characteristics of integrating agricultural chemicals, fertilizer and mulch film.
Function additive of the present invention needs to select addition or not added according to the growth of Different Crop, in cold district Antifreezing agent can be added in antifreeze plant application into mulch film, herbicide, bactericide can be added in the more plant application of weeds Into mulch film, aeroge can be added in the environment for need heat-insulation and heat-preservation into mulch film, need build up fertility in the case of Micro- fertilizer is added in mulch film.By adjusting the species and dosage of function additive, the mulch film for being adapted to Different Crop is obtained.
The present invention is additionally added sensitising agent so that mulch film has simultaneously to make up biodegradable imperfection in mulch film There are biological degradability and photodegradation, can be degradable to be harmless to soil and have after 10~30 days predetermined service life The material of benefit.
Present invention additionally comprises the mulch film being prepared according to the preparation method of the degradable preserving soil moisture agricultural mulching, adopt It is sprayed onto and is arranged on flat ground with the mode of sprinkling, mulch film can be formed in 3~5 minutes, ground is sealed up, is realized The warming and anti-moisture evaporation on ground top layer, and mulch film subsequent degradation is that fertilizer is immersed in ground, reaches preserving soil moisture effect.
The present invention has following advantageous effects：First, compared with prior art, mulch film uses polyhydroxyalkanoatefrom It is used in combination with fatty ester polycondensate, while coordinates marine algae extract, gumbo straw leaf powder, the jade for preparing or handling by ad hoc approach Rice and must be modified clay powder, and in the presence of film forming agent and crosslinking agent, synergy accelerates crystallization fast filming, it is possible to increase ground Film water moisture self restraint, the ability of heat absorption insulation, while there is the function of improving soil regime, increase soil fertility；Second, mulch film has Have the environmental-protecting performance of automatic degradable, there is degradable by light or organisms function, polyhydroxyalkanoatefrom, fatty ester polycondensate with Other known natural biodegradable material such as starch or cellulose is very alike, and these materials are final biological in the environment It is degraded to CO2、H2O and biomass；Marine algae extract, gumbo straw leaf powder, corn stigma can degradable and wide material sources, price it is low It is honest and clean；Ground film dynamic performance and environmental-protecting performance are good, existing plastic film can be replaced to be used in agricultural production, thoroughly solved The soil depletion and white pollution problems brought due to the use of plastic film；Third, mulch film film forming by the way of sprinkling, is saved Work is time saving, simple to operate, and film-formation result is good and speed is fast, not only has the function that soil moisture conservation, heats, and without prejudice to the children of plant Seedling passes through film layer, and degradable, application environment close friend can be realized typically after using 10-30 days.
Embodiment:
With reference to instantiation, the invention will be further described.
Embodiment 1：
The preparation method for the degradable preserving soil moisture agricultural mulching that the present embodiment is related to, the agricultural mulching is according to parts by weight Number includes：20 parts of polyhydroxyalkanoatecopolymers copolymers, fatty 8 parts of ester polycondensate, 30 parts of marine algae extract, 100 parts of n-hexane, 40 parts of gumbo straw leaf powder, 10 parts of corn stigma, modified 5 parts of clay powder, 15 parts of Propiram glue, 5 parts of carboxymethyl cellulose, the fourth of N, N- bis- 3 parts of base aminodithioformic acid iron, micro- fertile 12 parts；
The step of preparation process of the agricultural mulching includes：
(1) preparation of marine algae extract：
Dry seaweed after new fresh seaweed or immersion is cleaned it is standby, using Mechanical Crushing into being added to after tiny particle In reaction unit, water and ethanol are added, is beaten in the lump, obtain being beaten liquid A, the processing mashing liquid A under Ultrasonic Conditions 40 minutes, the supersonic frequency was 60Hz, and treatment temperature is 20 DEG C, AEO is added after having broken slurry, at 45 DEG C Lower immersion 12 hours, low-temp low-pressure are distilled to recover part organic solvent, and vapo(u)rizing temperature is 65 DEG C, and distillation pressure is -0.5MPa, pressure Filter obtains marine alga slag and filtrate, and filter press is 3000 mesh from filter cloth aperture, and the filtrate is marine algae extract；
Wherein the mass ratio of marine alga particle, water, ethanol and AEO is 30:85:85:0.1；
(2) preparation of gumbo straw leaf powder：The gumbo straw leaf at florescence, naturally dry are taken, classification grinding is less than 150 mesh into fineness Powder；
(3) processing of corn stigma：The whisker on the corn ear of autumn harvesting, naturally dry are taken, clipping is less than 1mm into length Particle section shape；
(4) modification of clay powder：Clay powder and ammoniacal liquor, silane resin acceptor kh-550 are pressed 1:4:0.5 weight is than sealing Mixing, 3h, reprecipitation 3h are soaked in the presence of stirring, lower sediment thing is taken, naturally dry, is ground into fineness and is less than 150 mesh Powder, wherein ammoniacal liquor can reuse, and the consumption rate of first use is less than 20%；
(5) preparation of mulch film：Polyhydroxyalkanoatecopolymers copolymers and fatty ester polycondensate are dissolved in n-hexane first It is well mixed, marine algae extract, gumbo straw leaf powder, corn stigma and modified clay powder are added, is uniformly mixed, then adds into Film, crosslinking agent, sensitising agent and optional function additive are quickly well mixed, and are incubated 60 minutes, are obtained mixture B, finally will Mixture B, which is added in the water of its 12 times of quality, to be stirred, and soil surface is sprayed to after stirring and forms mulch film；
The polyhydroxyalkanoatecopolymers copolymers are biodegradable, are about 50 comprising mol ratio:Two kinds of 50 are random Repeated monomer unit；Wherein the first random repeated monomer unit has the structure of formula (I)：
In formula：R1It is C2Alkyl, and n is 2；
Second of random repeated monomer unit that polyhydroxyalkanoatecopolymers copolymers include has the structure of formula (II)：
In formula：R2It is C10Alkenyl, and m is 12；
The polyhydroxyalkanoatefrom that the present embodiment uses is preferably by biologic artifact by fermentation or by the green of transgenosis Color plant obtains；The number-average molecular weight of polyhydroxyalkanoatecopolymers copolymers is 350,000 gram/mol, is had in film forming procedure Excellent stretch modulus and fracture toughness；
Fatty ester polycondensate is synthesized by 1,4- succinic acid and butanedioic acid described in the present embodiment.
Embodiment 2：
The preparation method for the degradable preserving soil moisture agricultural mulching that the present embodiment is related to, the agricultural mulching is according to parts by weight Number includes：40 parts of polyhydroxyalkanoatecopolymers copolymers, fatty 15 parts of ester polycondensate, 25 parts of marine algae extract, n-hexane 120 Part, 35 parts of gumbo straw leaf powder, 6 parts of corn stigma, modified 4 parts of clay powder, 10 parts of polyvinyl alcohol, 10 parts of carboxymethyl cellulose, methyl 5 parts of ketenes, 10 parts of antifreezing agent；
The step of preparation process of the agricultural mulching includes：
(1) preparation of marine algae extract：
Dry seaweed after new fresh seaweed or immersion is cleaned it is standby, using Mechanical Crushing into being added to after tiny particle In reaction unit, water and ethanol are added, is beaten in the lump, obtain being beaten liquid A, the processing mashing liquid A under Ultrasonic Conditions 20 minutes, the supersonic frequency was 85Hz, and treatment temperature is 45 DEG C, AEO is added after having broken slurry, at 25 DEG C Lower immersion 36 hours, low-temp low-pressure are distilled to recover part organic solvent, and vapo(u)rizing temperature is 45 DEG C, and distillation pressure is -1.0MPa, pressure Filter obtains marine alga slag and filtrate, and filter press is 3500 mesh from filter cloth aperture, and the filtrate is marine algae extract；
Wherein the mass ratio of marine alga particle, water, ethanol and AEO is 10:50:25:0.02；
(2) preparation of gumbo straw leaf powder：Take the gumbo straw leaf at florescence, naturally dry, classification grinding into fineness be 100 purposes Powder；
(3) processing of corn stigma：Take autumn pluck corn ear on whisker, naturally dry, clipping into length be 0.8mm Particle section shape；
(4) modification of clay powder：Clay powder and ammoniacal liquor, silane resin acceptor kh-550 are pressed 1:3:0.6 weight is than sealing Mixing, 2h, reprecipitation 4h are soaked in the presence of stirring, takes lower sediment thing, naturally dry, it is 100 purposes to be ground into fineness Powder, wherein ammoniacal liquor can reuse, and the consumption rate of first use is less than 20%；
(5) preparation of mulch film：Polyhydroxyalkanoatecopolymers copolymers and fatty ester polycondensate are dissolved in n-hexane first It is well mixed, marine algae extract, gumbo straw leaf powder, corn stigma and modified clay powder are added, is uniformly mixed, then adds into Film, crosslinking agent, sensitising agent and optional function additive are quickly well mixed, and are incubated 80 minutes, are obtained mixture B, finally will Mixture B, which is added in the water of its 10 times of quality, to be stirred, and soil surface is sprayed to after stirring and forms mulch film；
Polyhydroxyalkanoatecopolymers copolymers described in the present embodiment are biodegradable, are about 50 comprising mol ratio:50 Two kinds of random repeated monomer units；Wherein the first random repeated monomer unit has the structure of formula (I)：
In formula：R1It is H, and n is 2.
Second of random repeated monomer unit that polyhydroxyalkanoatecopolymers copolymers include has the structure of formula (II)：
In formula：R2It is C8Alkyl, and m is 6.
The polyhydroxyalkanoatefrom that the present embodiment uses is preferably by biologic artifact by fermentation or by the green of transgenosis Color plant obtains, and the number-average molecular weight of polyhydroxyalkanoatecopolymers copolymers is 300,000 gram/mol；
Fatty ester polycondensate is synthesized by 1,4- succinic acid and adipic acid described in the present embodiment.
Embodiment 3：
The preparation method for the degradable preserving soil moisture agricultural mulching that the present embodiment is related to, the agricultural mulching is according to parts by weight Number includes：30 parts of polyhydroxyalkanoatecopolymers copolymers, fatty 10 parts of ester polycondensate, 20 parts of marine algae extract, n-hexane 150 Part, 30 parts of gumbo straw leaf powder, 8 parts of corn stigma, modified 3 parts of clay powder, 13 parts of polyvinyl alcohol, 12 parts of carboxymethyl cellulose, methyl 4 parts of ketenes, 14 parts of antifreezing agent；
The step of preparation process of the agricultural mulching includes：
(1) preparation of marine algae extract：
Dry seaweed after new fresh seaweed or immersion is cleaned it is standby, using Mechanical Crushing into being added to after tiny particle In reaction unit, water and ethanol are added, is beaten in the lump, obtain being beaten liquid A, the processing mashing liquid A under Ultrasonic Conditions 30 minutes, the supersonic frequency was 70Hz, and treatment temperature is 30 DEG C, AEO is added after having broken slurry, at 30 DEG C Lower immersion 20 hours, low-temp low-pressure are distilled to recover part organic solvent, and vapo(u)rizing temperature is 50 DEG C, and distillation pressure is -0.8MPa, pressure Filter obtains marine alga slag and filtrate, and filter press is 1000 mesh from filter cloth aperture, and the filtrate is marine algae extract；
Wherein the mass ratio of marine alga particle, water, ethanol and AEO is 20:65:70:0.06；
(2) preparation of gumbo straw leaf powder：Take the gumbo straw leaf at florescence, naturally dry, classification grinding into fineness be 80 purposes Powder；
(3) processing of corn stigma：Take autumn pluck corn ear on whisker, naturally dry, clipping into length be 0.5mm Particle section shape；
(4) modification of clay powder：Clay powder and ammoniacal liquor, silane resin acceptor kh-550 are pressed 1:5:0.8 weight is than sealing Mixing, 2.5h, reprecipitation 5h are soaked in the presence of stirring, takes lower sediment thing, naturally dry, it is 80 purposes to be ground into fineness Powder, wherein ammoniacal liquor can reuse, and the consumption rate of first use is less than 20%；
(5) preparation of mulch film：Polyhydroxyalkanoatecopolymers copolymers and fatty ester polycondensate are dissolved in n-hexane first It is well mixed, marine algae extract, gumbo straw leaf powder, corn stigma and modified clay powder are added, is uniformly mixed, then adds into Film, crosslinking agent, sensitising agent and optional function additive are quickly well mixed, and are incubated 30 minutes, are obtained mixture B, finally will Mixture B, which is added in the water of its 14 times of quality, to be stirred, and soil surface is sprayed to after stirring and forms mulch film；
Polyhydroxyalkanoatecopolymers copolymers described in the present embodiment are biodegradable, are about 50 comprising mol ratio:50 Two kinds of random repeated monomer units；Wherein the first random repeated monomer unit has the structure of formula (I)：
In formula：R1It is C1Alkyl, and n is 1.
Second of random repeated monomer unit that polyhydroxyalkanoatecopolymers copolymers include has the structure of formula (II)：
In formula：R2It is H, and m is 16.
The polyhydroxyalkanoatefrom that the present embodiment uses is preferably by biologic artifact by fermentation or by the green of transgenosis Color plant obtains, and the number-average molecular weight of polyhydroxyalkanoatecopolymers copolymers is 390,000 gram/mol.
Fatty ester polycondensate is synthesized by butanedioic acid and adipic acid described in the present embodiment.
Mechanics Performance Testing is carried out to the mulch film obtained by embodiment 1-3, film tensile strength is resisted with TTM-500A type computers Testing machine is opened, by GB/T13022-91 standard tests, the mulch film tensile strength for measuring the present invention is 2.8~3.5KN/m2, implement Example 1-3 mulch film, compared with the soil of unused mulch film, can raise 5~8 DEG C of the soil moisture, compared with plastic covering mulch film, soil Earth water retention is suitable, and fertility can improve 15~25%, can improve per mu yield and in advance maturity period, is split through segmentation in 10~30 days, and 60 All degradeds in~80 days.

Claims (8)

  1. A kind of 1. preparation method of degradable preserving soil moisture agricultural mulching, it is characterised in that the raw material of the agricultural mulching according to Parts by weight include：20~40 parts of polyhydroxyalkanoatecopolymers copolymers, fatty 8~15 parts of ester polycondensate, marine algae extract 20 ~30 parts, 30~40 parts of gumbo straw leaf powder, 5~10 parts of corn stigma, modified 3~5 parts of clay powder, 10~15 parts of film forming agent, crosslinking 5~12 parts of agent, sensitising agent 3-5 parts, optional function additive 8-15 parts；
    Its step of preparation process includes：
    (1) preparation of marine algae extract：Dry seaweed after new fresh seaweed or immersion is cleaned it is standby, using Mechanical Crushing into thin It is added to after small particle in reaction unit, adds water and ethanol, be beaten in the lump, obtains being beaten liquid A, in ultrasonic wave bar Processing mashing liquid A20~40 minute under part, the supersonic frequency are 60~90Hz, and treatment temperature is 20~50 DEG C, after having broken slurry AEO is added, is soaked 12~48 hours at 20~45 DEG C, low-temp low-pressure is distilled to recover part organic solvent, Vapo(u)rizing temperature is 45~65 DEG C, and distillation pressure is -0.5~-1.2MPa, and press filtration obtains marine alga slag and filtrate, and filter press is from filter Cloth aperture is 800~4500 mesh, and the filtrate is marine algae extract；Wherein marine alga particle, water, ethanol and aliphatic alcohol polyethenoxy The mass ratio of ether is 5~30:10~85:10~85:0.01~0.1；
    (2) preparation of gumbo straw leaf powder：The gumbo straw leaf at florescence, naturally dry are taken, classification grinding is less than the powder of 150 mesh into fineness End；
    (3) processing of corn stigma：The whisker on the corn ear of autumn harvesting, naturally dry are taken, clipping is less than 1mm into length Grain section shape；
    (4) modification of clay powder：Clay powder and ammoniacal liquor, silane resin acceptor kh-550 are pressed 1:3~5:0.2~0.8 weight ratio Sealing mixing, 2~5h is soaked in the presence of stirring, 3~5h of reprecipitation, lower sediment thing is taken, naturally dry, is ground into fineness Clay powder must be modified less than 150 mesh powders, wherein ammoniacal liquor can reuse；
    (5) preparation of mulch film：Polyhydroxyalkanoatecopolymers copolymers and fatty ester polycondensate are dissolved in n-hexane and mixed first Uniformly, marine algae extract, gumbo straw leaf powder, corn stigma and modified clay powder are added, is uniformly mixed, then adds film forming Agent, crosslinking agent, sensitising agent and optional function additive are quickly well mixed, and are incubated 10~120 minutes, are obtained mixture B, finally Mixture B is added in the water of its 10~14 times of quality and is stirred, soil surface is sprayed to after stirring 3~5 minutes Interior formation mulch film.
  2. 2. the preparation method of degradable preserving soil moisture agricultural mulching according to claim 1, it is characterised in that the poly- hydroxyl It is 50 that phenylalkanoic acid ester polymer, which includes mol ratio,:50 two kinds of random repeated monomer units, wherein the first randomly repeat list Body unit has the structure of formula (I)：
    In formula：R1It is H, or C1~C3Alkyl, and n is 1 or 2；
    Second of random repeated monomer unit has the structure of formula (II)：
    In formula：R2It is H, or C3~C19Alkyl or C3~C19Alkenyl, and m is 2 to 16.
  3. 3. the preparation method of degradable preserving soil moisture agricultural mulching according to claim 1, it is characterised in that the fat Ester polycondensate is synthesized by 1, 4- succinic acid and butanedioic acid or its acid anhydrides, or 1, 4- succinic acid, butanedioic acid or its acid anhydrides and oneself two Acid synthesis.
  4. 4. the preparation method of degradable preserving soil moisture agricultural mulching according to claim 2, it is characterised in that the poly- hydroxyl Phenylalkanoic acid ester obtains by biologic artifact by fermentation or by the green plants of transgenosis.
  5. 5. degradable preserving soil moisture agricultural mulching according to claim 4, the number of polyhydroxyalkanoatecopolymers copolymers are divided equally Son amount is more than 250,000 grams/mol.
  6. 6. the preparation method of the degradable preserving soil moisture agricultural mulching according to claim any one of 1-5, it is characterised in that The film forming agent is polyvinyl alcohol or Propiram glue, and the crosslinking agent is N, N- methylene-bisacrylamides or carboxymethyl cellulose Element, the sensitising agent are N, N- dibutyl dithiocaarbamates iron, aminodithioformic acid nickel, benzophenone or ethylene methacrylic One or more in ketone.
  7. 7. the preparation method of the degradable preserving soil moisture agricultural mulching according to claim any one of 1-5, it is characterised in that The function additive is herbicide, bactericide, micro- fertilizer, foaming agent, antifreezing agent or one kind in aeroge or its combination.
  8. 8. the mulch film that a kind of preparation method of degradable preserving soil moisture agricultural mulching as described in claim 1-7 is prepared.
CN201710700737.8A 2017-08-16 2017-08-16 A kind of preparation method of degradable preserving soil moisture agricultural mulching Active CN107418170B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710700737.8A CN107418170B (en) 2017-08-16 2017-08-16 A kind of preparation method of degradable preserving soil moisture agricultural mulching

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710700737.8A CN107418170B (en) 2017-08-16 2017-08-16 A kind of preparation method of degradable preserving soil moisture agricultural mulching

Publications (2)

Publication Number Publication Date
CN107418170A true CN107418170A (en) 2017-12-01
CN107418170B CN107418170B (en) 2018-08-10

Family

ID=60438193

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710700737.8A Active CN107418170B (en) 2017-08-16 2017-08-16 A kind of preparation method of degradable preserving soil moisture agricultural mulching

Country Status (1)

Country Link
CN (1) CN107418170B (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108276792A (en) * 2018-01-29 2018-07-13 甘肃华瑞农业股份有限公司 A kind of degradable Insulation Mulch Film and its manufacturing method containing cow dung
CN109161059A (en) * 2018-09-14 2019-01-08 蚌埠创特新材料科技有限公司 A kind of complete biological controlled degradation multifunctional agricultural weeding soil moisture conservation mulch
CN109169111A (en) * 2018-11-05 2019-01-11 中国农业科学院农业环境与可持续发展研究所 A kind of potato Biodegradable mulch mulching plant method
CN109181252A (en) * 2018-08-09 2019-01-11 合肥必更赢科技有限公司 A kind of degradable agricultural film preparation method for cane planting
CN109526492A (en) * 2018-12-11 2019-03-29 烟台沃斯生物技术有限公司 A kind of application method starched
CN111527033A (en) * 2017-12-27 2020-08-11 富士胶片株式会社 Agricultural container
CN113004503A (en) * 2019-12-20 2021-06-22 杭州沃福生物科技有限公司 Polyester film-forming aqueous dispersion, liquid mulching film and application thereof
WO2022003195A1 (en) * 2020-07-02 2022-01-06 Aquaspersions Limited Aqueous biopolymer dispersions

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201663847U (en) * 2009-12-10 2010-12-08 于瑞德 Biodegradation nutritious mulching film
CN104788916A (en) * 2015-04-17 2015-07-22 柳州市乾阳机电设备有限公司 Biodegradable plastic
CN105503482A (en) * 2016-01-25 2016-04-20 陈一坚 Liquid alga fertilizer mulching film powder and using method thereof
CN106589871A (en) * 2016-12-21 2017-04-26 济宁明升新材料有限公司 Lignin modified PHA biodegradable plastic and preparing method thereof
CN106832807A (en) * 2016-12-29 2017-06-13 武汉华丽生物股份有限公司 A kind of controllable full-degradable mulch film of cellulose enhancing starch and preparation method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201663847U (en) * 2009-12-10 2010-12-08 于瑞德 Biodegradation nutritious mulching film
CN104788916A (en) * 2015-04-17 2015-07-22 柳州市乾阳机电设备有限公司 Biodegradable plastic
CN105503482A (en) * 2016-01-25 2016-04-20 陈一坚 Liquid alga fertilizer mulching film powder and using method thereof
CN106589871A (en) * 2016-12-21 2017-04-26 济宁明升新材料有限公司 Lignin modified PHA biodegradable plastic and preparing method thereof
CN106832807A (en) * 2016-12-29 2017-06-13 武汉华丽生物股份有限公司 A kind of controllable full-degradable mulch film of cellulose enhancing starch and preparation method thereof

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111527033A (en) * 2017-12-27 2020-08-11 富士胶片株式会社 Agricultural container
CN111527033B (en) * 2017-12-27 2021-11-09 富士胶片株式会社 Agricultural container
CN108276792A (en) * 2018-01-29 2018-07-13 甘肃华瑞农业股份有限公司 A kind of degradable Insulation Mulch Film and its manufacturing method containing cow dung
CN109181252A (en) * 2018-08-09 2019-01-11 合肥必更赢科技有限公司 A kind of degradable agricultural film preparation method for cane planting
CN109181252B (en) * 2018-08-09 2020-06-12 山东隆昌塑业有限公司 Preparation method of degradable agricultural mulching film for sugarcane planting
CN109161059A (en) * 2018-09-14 2019-01-08 蚌埠创特新材料科技有限公司 A kind of complete biological controlled degradation multifunctional agricultural weeding soil moisture conservation mulch
CN109169111A (en) * 2018-11-05 2019-01-11 中国农业科学院农业环境与可持续发展研究所 A kind of potato Biodegradable mulch mulching plant method
CN109526492A (en) * 2018-12-11 2019-03-29 烟台沃斯生物技术有限公司 A kind of application method starched
CN113004503A (en) * 2019-12-20 2021-06-22 杭州沃福生物科技有限公司 Polyester film-forming aqueous dispersion, liquid mulching film and application thereof
WO2022003195A1 (en) * 2020-07-02 2022-01-06 Aquaspersions Limited Aqueous biopolymer dispersions

Also Published As

Publication number Publication date
CN107418170B (en) 2018-08-10

Similar Documents

Publication Publication Date Title
CN107418170B (en) A kind of preparation method of degradable preserving soil moisture agricultural mulching
Rakhmankulov et al. STUDY OF CELLULOSE EXTRACTION PROCESSES SUITABLE FOR OBTAINING LOW-QUANTITY PRODUCTS FROM THE STEM PART OF THE LOCAL SAFLOR PLANT
CN103214315B (en) Greening matrix containing quarry mucks, animal manures, straws and charcoal powder and preparation method thereof
CN101831098B (en) Degradable agricultural film
CN102627973B (en) Preparation method of straw pulp mulch film
CN104744171A (en) Novel green biological organic fertilizer and preparation method thereof
CN1088225A (en) Vegetable fibre film product and technology thereof
KR101031365B1 (en) Biodegradable compositions for liquid mulching, a method for preparing the same and a method for mulching using the same
CN103265385A (en) Liquid film prepared from crop straw fermentation liquid and application method thereof
CN101444227A (en) Multifunctional biological seed coating agent and preparation method thereof
CN104119168A (en) Production method of attapulgite compressed nutrient soil
CN105439762A (en) Organic leaf fertilizer and preparation method thereof
KR20200065309A (en) Biodegradable mulching liquid and method for manufacturing biodegradable vinyl
CN109161059A (en) A kind of complete biological controlled degradation multifunctional agricultural weeding soil moisture conservation mulch
CN104396708A (en) Soilless-cultivated seedling matrix with low cost
CN106588483A (en) Eucalyptus seedling culture cultivation substrate and preparation method thereof
CN104212460A (en) Enteromorpha liquid mulching film and preparation method thereof
CN101743791A (en) Soil erosion resistance control method
CN109439332A (en) A kind of anti-drought water-retaining agent and preparation method thereof
CN104221792A (en) Method for preparing degradable liquid film by utilizing kitchen waste and biologic materials and product
CN104774047A (en) Organic cucumber seedling growing matrix and preparation method thereof
CN105272587B (en) A kind of multifunction degradable mulch
CN102126881B (en) Method for preparing forest container seedling culture substrate by utilizing Spartina alterniflora Loisel
CN106718754A (en) A kind of classification loop Application way of soilless culture cultivation residue
CN107286946B (en) A kind of degradable preserving soil moisture film spray coating liquor

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant