CN105906413A - Water-retaining chitosan bacteriostatic antibiotic fertilizer and preparation method thereof - Google Patents
Water-retaining chitosan bacteriostatic antibiotic fertilizer and preparation method thereof Download PDFInfo
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- CN105906413A CN105906413A CN201610235584.XA CN201610235584A CN105906413A CN 105906413 A CN105906413 A CN 105906413A CN 201610235584 A CN201610235584 A CN 201610235584A CN 105906413 A CN105906413 A CN 105906413A
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- 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
- C05G5/00—Fertilisers characterised by their form
- C05G5/30—Layered or coated, e.g. dust-preventing coatings
- C05G5/37—Layered or coated, e.g. dust-preventing coatings layered or coated with a polymer
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- 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
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Abstract
The invention discloses a water-retaining chitosan bacteriostatic antibiotic fertilizer and its preparation method. The preparation method comprises the following steps: firstly preparing a reaction solution of complex water-absorbent resin from PEG, PVA and AA under the action of an initiator and a cross-linking agent; putting chitosan particles into a coating machine before stopping stirring the reaction solution; and spraying the prepared reaction solution of water-absorbent resin while rotating, uniformly stirring, heating up, and drying until water content is not more than 5.0% so as to obtain PEG/PVA/PAA complex water-absorbent resin coated chitosan bacteriostatic antibiotic particles. The coating in the invention has water-saving, water-retaining and biodegradable properties. Thus, soil structure is improved but not affected; loss of nutrients is prevented; and the coating has a strong effect of absorbing nutritive elements such as K<+>, NH4<+> and NO3<+>, etc. In addition, the coating material is a composite material with a three-dimensional special network structure. The coating material has high jelly strength, is not easy to damage and can prolong controlled-release period.
Description
[technical field]
The invention belongs to agricultural fertilizer preparation technology field, particularly to a kind of water-retaining type chitosan bacteriostasis antibiosis fertilizer and preparation side thereof
Method.
[background technology]
Currently, with respect to chitosan at the existing correlative theses of application agriculturally and patent report.Chitosan is in the most traditional application
Mainly chitosan is dressed seed as seed dressing together with plant seed, as one natural alkalescence polysaccharide polymer, have good
Good biological degradability, biological activity and biocompatibility, but it is insoluble in neutral water due to it, largely limit shell
The application of polysaccharide.Mainly chitosan is dressed seed together with plant seed as seed dressing in the most traditional application, this
Although simple physical mixed can play fungistatic effect for the moment, but due to long-term exposed in the external world, by extraneous ring of chitosan
Border impact is relatively big, and loss is very fast, causes its deenergized period shorter, it is impossible to realize long-term bacteriostasis antibiosis effect.According to former Schiff
Alkali has preferable bactericidal effect, and the amino of chitosan is modified by people, prepares a series of Chitosan Schiff-base derivant,
There is good fungistatic effect.Carboxymethyl chitosan Schiff base derivatives (such as Chinese patent 200510046139.0) is by chitosan
Carboxy methylation is reacted with substituted salicylic aldehydes and is prepared.The method overcoming the feature of chitosan dissolubility difference, chitosan glues with salicylide
It is combined generation synergism, has good bacteriostasis antibiosis effect.But salicylide belongs to poisonous dangerous substance, to bad environmental,
Life-time service is relatively big to Influence To Soil, and residue is the most degradable, and this just determines this antibacterial and can not promote widely and long-term answering
With.
[summary of the invention]
It is an object of the invention to the shortcoming overcoming above-mentioned prior art, it is provided that a kind of water-retaining type chitosan bacteriostasis antibiosis fertilizer and system thereof
Preparation Method, the method uses degradable composite highly-absorbent resin material (PEG/PVA/PAA) to do coatings, prepared fertilizer
Material has that gel strength is big, deenergized period is in the most adjustable advantage.
In order to solve above-mentioned technical problem, the present invention adopts the following technical scheme that and is achieved:
A kind of preparation method of water-retaining type chitosan bacteriostasis antibiosis fertilizer, including:
1) by polyglycol solution, poly-vinyl alcohol solution and degree of neutralization be 70～85% acrylic acid mixing, and add initiator with
Cross-linking agent, uses water solution polymerization process 70～85 DEG C of stirring reactions 5-10 hour, prepares composite water absorbent resin reactant liquor；
2) before composite water absorbent resin reactant liquor stops stirring, screening granularity is that the chitosan particle of 20-200 mesh adds seed-coating machine；
3) in the case of seed-coating machine rotates, spray into the reaction solution of prepared composite water absorbent resin, and mixing and stirring obtains controlled release
Granule；Wherein, chitosan is 100:(5-40 with the mass ratio of composite water absorbent resin reactant liquor)；
4) controlled release granule is heated up, is dried and is not more than 5.0% to water content, i.e. obtain water-retaining type chitosan bacteriostasis antibiosis fertiliser granulates.
As a further improvement on the present invention, step 1) concretely comprise the following steps: by degree of neutralization be 70～85% acrylic acid mix with water
Molten being placed in reactor makes acrylic acid aqueous solution, at 50 DEG C, with part initiator, polyglycol solution is added acrylic acid water-soluble
Liquid stirs, after reaction 15min, when being warming up to 70～85 DEG C, adds poly-vinyl alcohol solution, cross-linking agent and remaining initiator
Mixed solution, react 5～10h, solution colour turn yellow, stop stirring, prepare composite water absorbent resin reactant liquor；Wherein, press
Calculate according to mass ratio, monomeric acrylic: Polyethylene Glycol: polyvinyl alcohol: initiator: cross-linking agent=100:10:15:1.1:0.3.
As a further improvement on the present invention, the mass fraction of polyglycol solution is 10%, and the mass fraction of poly-vinyl alcohol solution is
5%.
As a further improvement on the present invention, acrylic acid nertralizer be mass concentration be the NaHO of 20～25%.
As a further improvement on the present invention, described Polyethylene Glycol is Macrogol 4000, polyethylene glycol 6000, Polyethylene Glycol
8000, any one in PEG20000, PEG 20000；Described polyvinyl alcohol is polyvinyl alcohol 1799, gathers
One in vinyl alcohol 1788.
As a further improvement on the present invention, the molecular weight of described chitosan is 10000-200000.
As a further improvement on the present invention, described initiator is the one of potassium peroxydisulfate, Ammonium persulfate. and persulfate.
As a further improvement on the present invention, described cross-linking agent is N, N'-methylene-bisacrylamide, Borax, boric acid and boracic
One or more mixture in Organic substance.
As a further improvement on the present invention, step 3) in the slewing rate of seed-coating machine be 20-60 rev/min.
A kind of water-retaining type chitosan bacteriostasis antibiosis fertilizer, is by the preparation method system of described water-retaining type chitosan bacteriostasis antibiosis fertilizer
?.
Relatively and prior art, the invention have the advantages that
The present invention with Polyethylene Glycol (PEG), part neutralize acrylic acid (AA) and polyvinyl alcohol (PVA) as raw material, first
PEG, PVA, AA being reacted with cross-linking agent at initiator, chitosan particle sprays into PEG/PVA/PAA in the case of rotation
Reaction solution obtain the bacteriostasis antibiosis granule of PEG/PVA/PAA composite water absorbent resin encasement polysaccharide, i.e. water-retaining type chitosan presses down
Bacterium antibiotic fertilizer.Wherein the reaction solution of the coating material PEG/PVA/PAA of the present invention is flowing before stopping stirring in the reactor
Liquid, after question response liquid is sprayed onto humic acids particle surface, can occur automatically cross-linked between reactant liquor molecule, formed water-absorbing resin
Chitosan particle is coated with by gel film.Coating material is to have the composite gel strength of three-dimensional space network structure greatly, no
Cracky, it is possible to extend the slow release cycle；Also there is water saving, water conservation and degradability, do not affect, can improve on the contrary
Soil structure, prevents the loss of nutrient, the nutrients such as K+, NH4+ and NO3+ is had stronger adsorption.Part neutralizes
Acrylic acid can have and effectively prevent acrylic acid auto polymerization, cause the problem that real reaction acrylic acid is not enough.
Further, initiator uses the mode being dividedly in some parts, and is initially added into 1/3 initiator, makes polyglycol solution cause with part
Agent add acrylic acid carry out pre-reaction, after add 2/3 initiator, make poly-vinyl alcohol solution, cross-linking agent enter with remaining initiator
Row polyreaction.The implode phenomenon that such addition manner can cause after effectively preventing a collection of addition, impact reaction progress and
Productivity.
It addition, PVA and PEG is safe to the human body, nontoxic, residue is degradable, meets environmental requirement, it is simple to widely
Promote and long-term application.
The water-retaining type humic acid control-releasing fertilizer that the present invention prepares, has that gel strength is big, deenergized period is in the most adjustable advantage.
[accompanying drawing explanation]
Fig. 1 is the infrared spectrogram of coating material；
Fig. 2 is the XRD figure of coating material；
Fig. 3 is the thermal multigraph of coating material；
Fig. 4 a is coating material microscopic appearance figure；
Fig. 4 b is the microscopic appearance figure of coating product.
[detailed description of the invention]
The preparation method of the present invention a kind of water-retaining type chitosan bacteriostasis antibiosis fertilizer, first by PEG, PVA, AA initiator with
Prepare the reactant liquor of composite water absorbent resin under the effect of cross-linking agent, before reactant liquor stops stirring, chitosan particle put into seed-coating machine,
Under rotation situation, spray into the reaction solution preparing water-absorbing resin, stir, and heat up, be dried to water content and be not more than 5.0%；
I.e. can get the bacteriostasis antibiosis granule of PEG/PVA/PAA composite water absorbent resin encasement polysaccharide.Polyethylene Glycol: polyvinyl alcohol: draw
Send out agent: cross-linking agent=100:10:15:1.1:0.3.
The reactant liquor of composite water absorbent resin with Polyethylene Glycol (PEG), degree of neutralization be 70～85% acrylic acid (AA) and poly-second
Enol (PVA) is raw material, uses water solution polymerization process that with certain water is miscible, the acrylic acid that degree of neutralization is 75% is placed in 500ml
There-necked flask in, at 50 DEG C, PEG solution is added in acrylic acid with a certain amount of initiator and stirs, react 15min.Heat up
During to 75 DEG C, add the mixed solution of PVA solution and a certain amount of cross-linking agent and initiator.Reaction 5～10h, solution colour
Turn yellow, stop stirring, reaction liquid is poured out standby.The mass fraction of initiator be 1.1% (quality of relative monomer AA,
Lower with), the mass fraction of cross-linking agent be 0.3%, the mass fraction of PEG be 10%, the mass fraction of PVA be 15%, preparation
During PEG use mass fraction be the solution of 10%, PVA use mass fraction be the solution of 5%.
Wherein, the mass fraction of polyglycol solution is 10%, and the mass fraction of poly-vinyl alcohol solution is 5%.Degree of neutralization is 70～85%
Acrylic acid degree of neutralization be 70～85%.Concrete grammar is neutralized for adding NaHO in acrylic acid aqueous solution.
Polyethylene Glycol is selected from Macrogol 4000, polyethylene glycol 6000, PEG 8000, PEG20000, poly-second two
Any one in alcohol 20000；Polyvinyl alcohol one in polyvinyl alcohol 1799, polyvinyl alcohol 1788.Dividing of chitosan
Son amount is 10000-200000.Initiator is selected from potassium peroxydisulfate, Ammonium persulfate. and the one of persulfate.
Wherein the theory of coating is: the coating material that this research uses has the effect in stirring of the tri-kinds of raw materials of PVA, PEG, PAA
Issuing biochemical reaction, before stirring stops, reaction system is the liquid of flowing, and stirring stops, static 0.5-2 hour, reactant liquor
Gradually becoming gel state, gel in this case can not be re-dissolved in water, and heat treatment phase is to stable, belongs to heat irreversible
Gel.Gel reactant liquor after discontinuation of the stirring is still the liquid of flowing phase, is sprayed at the surface of phosphate fertilizer granule, static rear reaction
Liquid separates out gel at particle surface, it is achieved the cladding to fertilizer.
Below in conjunction with specific embodiment, the invention will be further described:
Embodiment 1
First by acrylic acid that degree of neutralization is 75% with in the miscible there-necked flask being placed in 500ml of certain water, by PEG at 50 DEG C
Solution adds stirring in acrylic acid with a certain amount of initiator, reacts 15min.When being warming up to 80 DEG C, add PVA solution and
A certain amount of cross-linking agent and the mixed solution of initiator, 75 DEG C of reaction 5h obtain PEG/PVA/PAA reaction solution.By granularity it is
The chitosan particle of 20 mesh puts into seed-coating machine, sprays into PEG/PVA/PAA reaction solution in the case of 20 revs/min, its mesochite
Polysaccharide and reactant liquor are compared by the quality of 100: 5 mixs homogeneously；Heat up, be dried to water content and be not more than 5.0%；The most available
The bacteriostasis antibiosis granule of PEG/PVA/PAA composite water absorbent resin encasement polysaccharide.
Embodiment 2
First by acrylic acid that degree of neutralization is 75% with in the miscible there-necked flask being placed in 500ml of certain water, by PEG at 50 DEG C
Solution adds stirring in acrylic acid with a certain amount of initiator, reacts 15min.When being warming up to 70 DEG C, add PVA solution and
A certain amount of cross-linking agent and the mixed solution of initiator.75 DEG C of reaction 10h obtain PEG/PVA/PAA reaction solution.By granularity it is
The chitosan particle of 200 mesh puts into seed-coating machine, sprays into PEG/PVA/PAA reaction solution, wherein in the case of 60 revs/min
Chitosan and reactant liquor are compared by the quality of 100: 40 mixs homogeneously；Heat up, be dried to water content and be not more than 5.0%；The most available
PEG/PVA/PAA composite water absorbent resin encasement polysaccharide bacteriostasis antibiosis granule.
Embodiment 3
First by acrylic acid that degree of neutralization is 75% with in the miscible there-necked flask being placed in 500ml of certain water, by PEG at 50 DEG C
Solution adds stirring in acrylic acid with a certain amount of initiator, reacts 15min.When being warming up to 75 DEG C, add PVA solution and
A certain amount of cross-linking agent and the mixed solution of initiator, 75 DEG C of reaction 5h obtain PEG/PVA/PAA reaction solution.By granularity it is
The chitosan particle of 50 mesh puts into seed-coating machine, sprays into PEG/PVA/PAA reaction solution in the case of 40 revs/min, its mesochite
Polysaccharide and reactant liquor are compared by the quality of 100: 10 mixs homogeneously；Heat up, be dried to water content and be not more than 5.0%；The most available
The bacteriostasis antibiosis granule of PEG/PVA/PAA composite water absorbent resin encasement polysaccharide.
Embodiment 4
First by acrylic acid that degree of neutralization is 80% with in the miscible there-necked flask being placed in 500ml of certain water, by PEG at 50 DEG C
Solution adds stirring in acrylic acid with a certain amount of initiator, reacts 15min.When being warming up to 75 DEG C, add PVA solution and
A certain amount of cross-linking agent and the mixed solution of initiator, 75 DEG C of reaction 7h obtain PEG/PVA/PAA reaction solution.By granularity it is
The chitosan particle of 100 mesh puts into seed-coating machine, sprays into PEG/PVA/PAA reaction solution, wherein in the case of 30 revs/min
Chitosan and reactant liquor are compared by the quality of 100: 20 mixs homogeneously；Heat up, be dried to water content and be not more than 5.0%；The most available
The bacteriostasis antibiosis granule of PEG/PVA/PAA composite water absorbent resin encasement polysaccharide.
Embodiment 5
First by acrylic acid that degree of neutralization is 70% with in the miscible there-necked flask being placed in 500ml of certain water, by PEG at 50 DEG C
Solution adds stirring in acrylic acid with a certain amount of initiator, reacts 15min.When being warming up to 75 DEG C, add PVA solution and
A certain amount of cross-linking agent and the mixed solution of initiator, 75 DEG C of reaction 10h obtain PEG/PVA/PAA reaction solution.By granularity it is
The chitosan particle of 150 mesh puts into seed-coating machine, sprays into PEG/PVA/PAA reaction solution, wherein in the case of 50 revs/min
Chitosan and reactant liquor are compared by the quality of 100: 30 mixs homogeneously；Heat up, be dried to water content and be not more than 5.0%；The most available
PEG/PVA/PAA composite water absorbent resin encasement polysaccharide bacteriostasis antibiosis granule.
Verification experimental verification
Fig. 1 is the infrared spectrogram of coating material；Wherein, the figure of PVA, 1600cm-1There is the in-plane bending absworption peak of H-O in place,
650cm-1Place occurs in that weak and wide H-O out-of-plane bending absworption peak, 3400cm-1The stretching vibration absworption peak of-OH occurs ,-OH's
Absworption peak is strong and width meets the feature that-OH in PVA exists with multimeric forms.
PEG schemes, 2800cm-1One wide and weak absworption peak occurs, this be probably-OH Intramolecular association stretching vibration absworption peak with
CH2C h bond stretching vibration peak overlapping caused by, 3382cm-1There is the vibration absorption peak of-OH in place, strong with the same absworption peak of PVA
And width be-OH polymeric characteristic absorption peak, 1050cm-1There is the C-O stretching vibration absworption peak of primary alconol in place.
PAA figure is it can be seen that 3550cm-1The O-H stretching vibration peak of place free carboxy acid, 3300cm-1Place have width and scattered peak be by
Dimer hydroxyl peak is formed to caused by the displacement of lower wave number direction, 2926cm in carboxylic acid-1And 2853cm-1Place occurs methylene-CH respectively2
Antisymmetry and symmetrical stretching vibration absworption peak, 1640cm-1Place occurs in that the C=O stretching vibration peak of carboxylic acid, 1400cm-1With
1529cm-1Place occurs in that carboxylate ion (-CO respectively2 -) symmetrical stretching vibration and antisymmetric stretching vibration absworption peak.
The polymeric absworption peak of peak position-OH of PEG/PVA/PAA substantially weakens, for relative PAA, and 3550cm-1Place free carboxy acid
O-H stretching vibration peak is relatively strong and 3300cm-1The carboxylic acid dimer hydroxyl peak at place disappears, and the hydroxyl in composite and carboxyl are described
Between there occurs interaction, 1708cm-1Occur in that C=O stretching vibration absworption peak in ester group, for relative PEG, 1050cm-1
The absworption peak of place primary alconol C-O the most substantially weakens, and in the infrared spectrum being embodied in product that the absworption peak of PVA is the most complete, shows system
For PEG/PVA/PAA composite, and between the functional group of composite, there occurs stronger interaction.
Fig. 2 is the XRD figure of coating material, and the peak position of the product peak relative to for PAA 17.8 ° disappears, and remains 7.7 ° and 32.4 ° of left sides
Right peak, in the diffraction pattern being embodied in product that the diffraction maximum of PVA, PEG all can be the most complete, the derivative peak of 19.3 ° be probably because of
Derivative peak for both PVA, PEG 19.1 ° with 20 ° overlaps caused, and other 19.3 ° of diffraction maximums with 23.3 ° are obvious relative to for PEG
Broadening and weaken, product has more weak new crystal face peak to occur at about 40.8 °, shows to be prepared for new composite, and PVA is linear
With PAA, macromole also may there occurs that chemical action introduces chemical bond while IPN mechanical interlocking.
Fig. 3 is the thermal multigraph of coating material；PVA starts weightlessness at 200 DEG C, tends towards stability when 250 DEG C, and this is primarily due to PVA
Start when being heated to 200 DEG C to decompose, be heated to when 250 DEG C become the polymer containing conjugated double bond.
PEG is almost no change before 300 DEG C, and after 300 DEG C, weight slowly declines, and starts drastically straight line and decline when 400 DEG C, this
It is primarily due to PEG better heat stability, just starts when being heated to 300 DEG C fracture or thermal cracking to occur, when heating-up temperature reaches
When 400 DEG C, PEG cracks the most completely, weightless aggravation.
PAA is thermally-stabilised preferably, obvious weightlessness does not occur, starts slow weightlessness when 300 DEG C, but when temperature reaches
600 DEG C, weight stills remain in more than 50%.
Water-absorbing resin PEG/PVA/PAA can have slight weightlessness before 100 DEG C, and this is possibly due in composite resin combine water
The weightlessness that causes of evaporation, starts weightlessness with the same water-absorbing resin of PAA when 300 DEG C, and weightlessness relatively PAA is serious, mainly
The PVA hot property being because being interspersed with in product is poor.The heat resistance of product is maintained at about 75% when 400 DEG C, resin
Having preferable heat stability, remaining mass retention rate is about 45%, from thermogravimetric analysis figure it appeared that PEG/PVA/PAA material
Material possesses good heat resistance.
Fig. 4 a is coating material microscopic appearance figure, and Fig. 4 b is the microscopic appearance figure of coating product, and coating material surface presents cellular,
This cavernous structure, when in soil, nutrient is more abundant, Controlled Release Fertilizer absorption nutrient plays guarantor's storage effect.When plant growing needs
During soil supply nutrient, nutrient and the fertilizer of internal cladding that Controlled Release Fertilizer is adsorbed supply plant by exchange interaction.
The fertilizer prepared below for different embodiments of the invention carries out plant fertilising checking, and specific experiment data are shown in Table 1:
Table 1
* the implementation result data of chitosan release and release control fertilizer, temperature is in subzero 5 DEG C (-5 DEG C) left and right, and potted plant is Semen Tritici aestivi.
By data above it can be seen that use the fertilizer prepared of the present invention to carry out plant fertilising, after 25 days, just occur that soil is complete
Become dry, within 20 days, be that plant starts withered phenomenon occur, after 35 days, start bending, withered serious, after example 1,2,3,5 refills water
Plant is the most full of vitality.Although example 4, Plant death after 35 days, but the Water-saving effect of fertilizer and fertilizer is antibacterial cold-resistant
Effect is the most clearly.Compared to blank, in the case of winter subzero 5 DEG C of colds, the withering period of plant has been delayed at least ten days, survival
Rate is greatly improved.
The above, be only presently preferred embodiments of the present invention, not impose any restrictions the present invention, every real according to the technology of the present invention
Any simple modification, change and the equivalent structure transformation that confrontation above example is made, all still falls within the guarantor of technical solution of the present invention
In the range of protecting.
Claims (10)
1. the preparation method of a water-retaining type chitosan bacteriostasis antibiosis fertilizer, it is characterised in that including:
1) by polyglycol solution, poly-vinyl alcohol solution and degree of neutralization be 70～85% acrylic acid mixing, and add initiator with
Cross-linking agent, uses water solution polymerization process 70～85 DEG C of stirring reactions 5-10 hour, prepares composite water absorbent resin reactant liquor；
2) before composite water absorbent resin reactant liquor stops stirring, screening granularity is that the chitosan particle of 20-200 mesh adds seed-coating machine；
3) in the case of seed-coating machine rotates, spray into the reaction solution of prepared composite water absorbent resin, and mixing and stirring obtains controlled release
Granule；Wherein, chitosan is 100:(5-40 with the mass ratio of composite water absorbent resin reactant liquor)；
4) controlled release granule is heated up, is dried and is not more than 5.0% to water content, i.e. obtain water-retaining type chitosan bacteriostasis antibiosis fertiliser granulates.
The preparation method of a kind of water-retaining type chitosan bacteriostasis antibiosis fertilizer the most according to claim 1, it is characterised in that: step
Rapid 1) concretely comprise the following steps: by degree of neutralization be 70～85% miscible with water being placed in reactor of acrylic acid make acrylic acid aqueous solution,
At 50 DEG C, polyglycol solution is added in acrylic acid aqueous solution with part initiator and stir, after reaction 15min, be warming up to
When 70～85 DEG C, add poly-vinyl alcohol solution, cross-linking agent and the mixed solution of remaining initiator, react 5～10h, solution face
Complexion changed is yellow, stops stirring, prepares composite water absorbent resin reactant liquor；Wherein, calculate according to mass ratio, monomeric acrylic: poly-second two
Alcohol: polyvinyl alcohol: initiator: cross-linking agent=100:10:15:1.1:0.3.
The preparation method of a kind of water-retaining type chitosan bacteriostasis antibiosis fertilizer the most according to claim 1 and 2, it is characterised in that:
The mass fraction of polyglycol solution is 10%, and the mass fraction of poly-vinyl alcohol solution is 5%.
The preparation method of a kind of water-retaining type chitosan bacteriostasis antibiosis fertilizer the most according to claim 1 and 2, it is characterised in that:
Acrylic acid nertralizer be mass concentration be the NaHO of 20～25%.
The preparation method of a kind of water-retaining type chitosan bacteriostasis antibiosis fertilizer the most according to claim 1, it is characterised in that: institute
The Polyethylene Glycol stated is Macrogol 4000, polyethylene glycol 6000, PEG 8000, PEG20000, Polyethylene Glycol
Any one in 20000；Described polyvinyl alcohol is the one in polyvinyl alcohol 1799, polyvinyl alcohol 1788.
The preparation method of a kind of water-retaining type chitosan bacteriostasis antibiosis fertilizer the most according to claim 1, it is characterised in that: institute
The molecular weight of the chitosan stated is 10000-200000.
The preparation method of a kind of water-retaining type chitosan bacteriostasis antibiosis fertilizer the most according to claim 1, it is characterised in that: institute
The initiator stated is the one of potassium peroxydisulfate, Ammonium persulfate. and persulfate.
The preparation method of a kind of water-retaining type chitosan bacteriostasis antibiosis fertilizer the most according to claim 1, it is characterised in that: institute
The cross-linking agent stated is one or more mixture in N, N'-methylene-bisacrylamide, Borax, boric acid and boracic Organic substance.
The preparation method of a kind of water-retaining type chitosan bacteriostasis antibiosis fertilizer the most according to claim 1, it is characterised in that: step
Rapid 3) in, the slewing rate of seed-coating machine is 20-60 rev/min.
10. a water-retaining type chitosan bacteriostasis antibiosis fertilizer, it is characterised in that be by the guarantor described in claim 1-9 any one
The preparation method of water type chitosan bacteriostasis antibiosis fertilizer prepares.
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| CN107353434A (en) * | 2017-07-13 | 2017-11-17 | 全椒县赤镇龙虾经济专业合作社 | A kind of preparation method using hydroxypropylation lobster shell as primary raw material composite water conservation material |
| CN110877994A (en) * | 2019-11-29 | 2020-03-13 | 广东省农业科学院作物研究所 | Special organic fertilizer for peanuts |
| CN114032687A (en) * | 2021-11-12 | 2022-02-11 | 南通大学 | Preparation method and application of moisture-proof and mildew-proof resin |
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| CN107353434A (en) * | 2017-07-13 | 2017-11-17 | 全椒县赤镇龙虾经济专业合作社 | A kind of preparation method using hydroxypropylation lobster shell as primary raw material composite water conservation material |
| CN110877994A (en) * | 2019-11-29 | 2020-03-13 | 广东省农业科学院作物研究所 | Special organic fertilizer for peanuts |
| CN114032687A (en) * | 2021-11-12 | 2022-02-11 | 南通大学 | Preparation method and application of moisture-proof and mildew-proof resin |
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