CN109851437A - A kind of the water-retaining type release and release control fertilizer and its production method of biomass-based polymer capsule - Google Patents
A kind of the water-retaining type release and release control fertilizer and its production method of biomass-based polymer capsule Download PDFInfo
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Abstract
The invention discloses a kind of water-retaining type release and release control fertilizer of biomass-based polymer capsule and its production methods, the following steps are included: biomass is liquefied under the action of liquefier and catalyst as coating liquid first, coating liquid is sprayed to curing agent by different proportion on the fertiliser granulates of preheating simultaneously and react film-forming, obtains biomass film-coated controlled release fertilizer；Then biomass and acrylic acid are prepared into powdered and liquid water-absorbing resins through graft polymerization reaction respectively；Powdered and water-absorbing resins with suspended state are finally sprayed onto biomass film-coated controlled release fertilizer surface simultaneously by different proportion, film forming is rolled and obtains the water-retaining type release and release control fertilizer of biomass-based polymer capsule.The water-retaining type release and release control fertilizer not only has accurate nutrient control release performance, and there is preferable moisture to protect accumulation of energy power, the degradation property of membrane material in the soil is improved, reduces dependence of the coated fertilizer to fossil resources, realizes the sustainable development of coated fertilizer.
Description
Technical field
The present invention relates to technical field of agricultural fertilizers, specially a kind of water-retaining type Controlled Release Fertilizer of biomass-based polymer capsule
Material and its production method.
Background technique
Chemical fertilizer is the good important leverage of high crop yield in agricultural production.With the increase to grain demand, chemistry
The amount of application of fertilizer is also increasing, causes a large amount of fertilizer by the loss of the approach such as rainwash, leaching, ammonia volatilization, both made
It is wasted at unnecessary fertilizer, and great threat is caused to atmosphere, water body and soil environment.
Film-coated controlled release fertilizer is a kind of by coating one layer of low permeable organic polymer or organic-on granulated fertilizer surface
Inorganic blended polymer materials, it is real by regulating and controlling the parameter changes such as membrane material property and thickness fertiliser granulates Nutrient Release
The new-type fertilizer that existing fertilizer nutrient dissolution release matches with Different Crop nutrient demand.Film-coated controlled release fertilizer can significantly improve
Fertilizer nutrient utilization, to realize fertilizer " upgrading synergy ".
In addition to chemical fertilizer, water is another of crops normal growth and important leverage.China's per capita water resource is only
How the 25% of world average level improves water use efficiency under the premise of agricultural water natural resources shortage and has become China
The major issue that ecological efficient agricultural development faces.Water-retaining agent, also known as high-moisture-retention resin are a kind of new function macromolecule materials
Material kind can be absorbed itself hundreds times of moisture, and the slow release under drought condition for agricultural, have unique water suction
With and water holding capacity, water use efficiency can be effectively improved, have become Agricultural Moisture efficiently utilize in a hand
Section.
Water-retaining type slowly/controlled releasing fertilizer can synthesization the advantages of utilizing release and release control fertilizer and water-retaining agent, it is synchronous to realize that crop is high
It produces stable yields and liquid manure is efficiently sharp, have become one of the hot spot of fertilizer industry development.
Patent CN102795024A discloses a kind of using agricultural crop straw as the film-coated controlled release fertilizer of degradable membrane and its life
Production method, gained film-coated controlled release fertilizer has preferable nutrient controlled release ability, and takes full advantage of discarded renewable plant
Biomass resource-agricultural crop straw reduces dependence of the coated fertilizer to fossil resources, realizes coating material as membrane material
The sustainable development of material, but gained fertilizer does not have water retaining function.
Patent CN106977314A disclose a kind of agricultural crop straw water-retaining agent coating water-retaining type slowly/controlled releasing fertilizer and its
Preparation method, coating material can be degradable, and Water-saving effect is preferable, and nutrients release controllability is strong, but the water-retaining type Controlled Release Fertilizer
Expect that internal layer coated fertilizer is still the poor epoxy resin of degradability, on the one hand increases fertilizer cost, on the other hand reduce fertilizer
Expect the degradation property of putamina in the soil.So a kind of low cost of domestic and international urgent need, residual film is degradable, controlled-release effect is good
Water preserving type film coated release and release control fertilizer, to apply in agricultural production.
Summary of the invention
The purpose of the present invention is to provide it is a kind of it is cheap, preparation process is simple, residual film degradable life in the soil
The water-retaining type release and release control fertilizer and its production method of substance based polyalcohol coating, to solve the problems mentioned in the above background technology.
To achieve the above object, the invention provides the following technical scheme: a kind of water-retaining type of biomass-based polymer capsule
Release and release control fertilizer, the raw material including following parts by weight proportion: 20-60 parts of biomass, 100 parts of liquefier, 1-5 parts of catalyst, packet
40-60 parts of film liquid B, 3-5 parts of curing agent, 40-100 parts of reaction monomers, 1-2 parts of initiator, 1-2 parts of crosslinking agent.
Further, raw material: biomass is agricultural crop straw, peanut shell, husk, rice husk, waste paper, leaf, reed, wood
The mixture of one or more of bits, bagasse, waste cotton wadding, discarded starch, bark, the leaf of bamboo.
Further, raw material: liquefier is ethylene carbonate, propene carbonate, sweet glycol, ethylene glycol or glycerine
One or more mixtures.
Further, raw material: coating liquid B be isophorone diisocyanate, toluene di-isocyanate(TDI), diphenylmethyl
The mixing of one or more of alkane diisocyanate, dicyclohexyl methyl hydride diisocyanate or hexamethylene diisocyanate
Object.
Further, raw material: curing agent is diethylenetriamines, trien, tetren and Duo Ya
The mixture of one or more of polyethylene polyamine.
Further, raw material: reaction monomers are that acrylic acid is mixed with the one or two of acrylamide with any ratio.
Further, raw material: initiator is one of potassium peroxydisulfate, ammonium persulfate, ammonium ceric nitrate and persulfate
Or it is several with any ratio mixing.
Further, raw material: crosslinking agent N, N'- methylene-bisacrylamide, borax, boric acid and boracic organic matter
One or more of with it is any than mixing.
The present invention provides another technical solution are as follows: a kind of life of the water-retaining type release and release control fertilizer of biomass-based polymer capsule
Production method, comprising the following steps:
Step 1): it is reacted after 20-60 parts of biomass are uniformly mixed with 100 parts of liquefiers, 1-5 parts of catalyst through 150-200 DEG C
2-3h obtains biomass coating liquid A after products therefrom is cooling；Then by A, 40-60 parts of coating liquids of 40-60 parts of biomass coating liquids
B, which is sprayed to 3-5 parts of curing agent simultaneously on the fertiliser granulates of preheating, reacts film-forming, obtains biomass coating controlled-release fertilizer
Material；
Step 2: 20-50 parts of biomass, 40-100 parts of reaction monomers, 1-2 parts of initiators and 1-2 parts of crosslinking agents are uniformly mixed
Gel water-absorbing resin is obtained through graft polymerization reaction at 50-90 DEG C afterwards；Partial gel shape product drying, cooling, crushing
After obtain powdered water-absorbing resin；
Step 3): 5-10 parts of gel water-absorbing resins and 50-100 parts of powdered water-absorbing resins are added respectively in proportion in rotary drum
Enter into step 1) biomass film-coated controlled release fertilizer particle surface, form a film through rotation, forms the smooth biomass-based polymerization in surface
The water-retaining type release and release control fertilizer of object coating.
Further, the coated fertilizer quality in the step 1) accounts for the 3%-5% of fertilizer gross mass；The step (3)
In coated fertilizer quality account for the 10%-15% of fertilizer gross mass.
Compared with prior art, the beneficial effects of the present invention are:
1, the water-retaining type release and release control fertilizer and its production method of a kind of biomass-based polymer capsule provided by the invention, it is raw with agricultural
Physical resources are primary raw material, take full advantage of reproducible abandoned biomass resource, reduce raw materials for production cost, reduce
Dependence to petroleum chemicals, membrane material in the soil can be degradable, solve traditional coated fertilizer caused ring difficult to degrade
Border problem.
2, the water-retaining type release and release control fertilizer and its production method of a kind of biomass-based polymer capsule provided by the invention uses
The preparation of rotary drum coating process, good film-forming property reduce membrane material dosage, and preparation process is simple, reduce fertilizer preparation cost, have
There are preferable application value and market prospects.
3, the water-retaining type release and release control fertilizer and its production method of a kind of biomass-based polymer capsule provided by the invention, it is made
Standby biomass-based polymer capsule also has preferable water-absorbing-retaining ability, especially in addition to good nutrient controlled release ability
It is raw that it is suitable for the agricultural that rainfall is insufficient, agricultural irrigation water lacks area.
4, the water-retaining type release and release control fertilizer and its production method of a kind of biomass-based polymer capsule provided by the invention, coating
Release and release control fertilizer nutrients release function is excellent, can adjust film thickness according to different needs, to controlling fertilizer releasing period in 1-
12 months, it is able to satisfy the growth demand of different agriculture objects.
Detailed description of the invention
Fig. 1 is the water-retaining type release and release control fertilizer production technological process of biomass-based polymer capsule of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In the embodiment of the present invention: providing a kind of water-retaining type release and release control fertilizer of biomass-based polymer capsule, including following heavy
The raw material of amount number proportion: 20-60 parts of biomass, 100 parts of liquefier, 1-5 parts of catalyst, 40-60 parts of coating liquid B, curing agent
3-5 parts, 40-100 parts of reaction monomers, 1-2 parts of initiator, 1-2 parts of crosslinking agent.
In the present embodiment, raw material: biomass is agricultural crop straw (corn stover, wheat straw, Cotton Stalk, straw, peanut stems
Stalk, sugarcane stalk, soybean stalk), it is peanut shell, husk, rice husk, waste paper, leaf, reed, sawdust, bagasse, waste cotton wadding, discarded
The mixture of one or more of starch, bark, the leaf of bamboo.
In the present embodiment, raw material: liquefier is ethylene carbonate, propene carbonate, sweet glycol, ethylene glycol or glycerine
One or more mixtures.
In the present embodiment, raw material: coating liquid B be isophorone diisocyanate, toluene di-isocyanate(TDI), diphenylmethyl
The mixing of one or more of alkane diisocyanate, dicyclohexyl methyl hydride diisocyanate or hexamethylene diisocyanate
Object.
In the present embodiment, raw material: curing agent is diethylenetriamines, trien, tetren and Duo Ya
The mixture of one or more of polyethylene polyamine.
In the present embodiment, raw material: reaction monomers are that acrylic acid is mixed with the one or two of acrylamide with any ratio.
In the present embodiment, raw material: initiator is one of potassium peroxydisulfate, ammonium persulfate, ammonium ceric nitrate and persulfate
Or it is several with any ratio mixing.
In the present embodiment, raw material: crosslinking agent N, N'- methylene-bisacrylamide, borax, boric acid and boracic organic matter
One or more of with it is any than mixing.
Referring to Fig. 1, based on the raw material of above-mentioned parts by weight proportion, also being provided a kind of biomass-based poly- in the present embodiment
Close the production method of the water-retaining type release and release control fertilizer of object coating, including following process flow:
Step 1: common fertilizer pre-processes: the fertiliser granulates such as urea or compound fertilizer being added in rotary drum, heating makes fertiliser granulates
It is preheated to 60-90 DEG C；
Step 2: preparation biomass coating liquid: will be mixed in a kettle after the metering of smashed biomass, liquefier and catalyst
It closes uniformly, oil bath heating 2-3 h at 150-200 DEG C obtains biomass coating liquid after product is then taken out cooling；
Step 3: preparation biomass film-coated controlled release fertilizer: biomass coating liquid and curing agent are sprayed to the fertilizer of preheating simultaneously
Particle surface, coating liquid obtain biomass film-coated controlled release fertilizer in fertiliser granulates surface film-forming；
Step 4: preparing water-absorbing resins: in a kettle by smashed biomass, reaction monomers, initiator and crosslinking agent
It is uniformly mixed, gel water-absorbing resins is obtained through graft polymerization reaction at 50-90 DEG C, by partial gel shape water-absorbing resins
Dries pulverizing obtains powdery, water-absorbent resin；
Step 5: preparing water-retaining type release and release control fertilizer: will be added in rotary drum after the metering of gel water-absorbing resins, keep it uniform
It attaches on biomass film-coated controlled release fertilizer surface, while powdered water-absorbing resins are added to fertiliser granulates surface, through rolling
Dynamic homogeneous film formation obtains the water-retaining type release and release control fertilizer of biomass-based polymer capsule；
Step 6: water-retaining type release and release control fertilizer post-processes: by the water-retaining type release and release control fertilizer of biomass-based polymer capsule at 80-90 DEG C
Lower drying, and be transferred in container, it is allowed to cool to room temperature, then weighed, packed and stored to it.
In order to further preferably illustrate the present invention, also provides and prepared by above-mentioned different weight number raw material proportioning
Water-retaining type release and release control fertilizer production method:
Embodiment 1:
A kind of production method of the water-retaining type release and release control fertilizer of biomass-based polymer capsule, comprising the following steps:
Step 1: weighing 250 g carbonic acid Asia second rouge, and 40 ml ethylene glycol and 5 ml sulfuric acid are uniformly mixed in three-necked flask, rise
Temperature is to the smashed wheat stalk of 100g is added after 160 DEG C, and after taking out liquefaction products after 50 min of constant temperature agitating and heating
It is quickly cooled down in ice-water bath, terminates reaction, obtain coating liquid A, it is spare；
Step 2: being added dropwise the sodium hydroxide solution of 5 mol/L under conditions of ice-water bath into 20 g acrylic acid, adjusts acrylic acid
Degree of neutralization is to 75%；It weighs the smashed wheat stalk of 10.0 g to be added in three-necked flask, 20 ml distilled water, 85 DEG C of water-baths is added
It heats 30 min, the acrylic acid after neutralizing is added, stir initiator potassium persulfate and crosslinking agent N, N'- methylene after 2 min
Bisacrylamide is dissolved in respectively in 2 ml distilled water, is successively slowly added in three-necked flask, control 85 DEG C of temperature, water bath with thermostatic control after
Continuous stirring keeps the temperature 90 min to gel is become；It is crushed after portion of product is taken out 85 DEG C of vacuum oven drying, it is spare；
Step 3: the granular urea particle that 1 kg diameter is 2-4 mm is packed into rotary drum coating machine, is heated to 75 DEG C；Then
It will be preheating to 80 DEG C of 4.99g methyl diphenylene diisocyanate, 4.99 g coating liquid A and 0.02g triethylene tetramines are fast simultaneously
Speed sprays to urea granules surface, can be in fertiliser granulates surface film-forming after 5-6 minutes, this process, which is repeated 3 times, is given birth to
Substance film-coated controlled release fertilizer；Then the gelatinous water-retaining agent of 10 g is added in rotary drum, attaches it uniformly in fertiliser granulates
Surface, while the powdered water-absorbing resins of 100 g are added, it forms a film through rolling, forms the water conservation of biomass-based polymer capsule
Type release and release control fertilizer.
Embodiment 2:
A kind of production method of the water-retaining type release and release control fertilizer of biomass-based polymer capsule, comprising the following steps:
Step 1: weighing 250 g carbonic acid Asia second rouge, and 45 ml ethylene glycol and 5 ml sulfuric acid are uniformly mixed in three-necked flask, rise
Temperature is taken out liquefaction products after 120 min of constant temperature agitating and heating to the smashed corn stover of 100 g is added after 200 DEG C
It is quickly cooled down in ice-water bath afterwards, terminates reaction, obtain coating liquid A, it is spare；
Step 2: being added dropwise the sodium hydroxide solution of 5 mol/L under conditions of ice-water bath into acrylic acid, adjusts acrylic acid and neutralizes
It spends to 75%；It weighs the smashed corn stover of 10.0 g to be added in three-necked flask, 20 ml distilled water, 85 DEG C of heating water baths is added
The acrylic acid after neutralizing is added in 30 min, stirs initiator potassium persulfate and crosslinking agent N, N'- di-2-ethylhexylphosphine oxide third after 2 min
Acrylamide is dissolved in respectively in 2 ml distilled water, is successively slowly dropped in three-necked flask, controls 85 DEG C of temperature, water bath with thermostatic control continues
Stirring keeps the temperature 90 min to gel is become；It is crushed after portion of product is taken out 85 DEG C of vacuum oven drying, it is spare；
Step 3: the granular urea particle that 1 kg diameter is 2-4 mm is packed into rotary drum coating machine, is heated to 75 DEG C；Then
80 DEG C of 4.99 g isophorone diisocyanate will be preheating to, 4.99 g coating liquid A and 0.02 g triethylene tetramine are fast simultaneously
Speed sprays to urea granules surface, can be in fertiliser granulates surface film-forming after 5-6 minutes, this process, which is repeated 3 times, is given birth to
Substance film-coated controlled release fertilizer；Then the gelatinous water-retaining agent of 15 g is added in rotary drum, attaches it uniformly in fertiliser granulates
Surface, while the powdered water-absorbing resins of 150 g are added, the water-retaining type of biomass-based polymer capsule is formed through rolling film forming
Release and release control fertilizer.
Embodiment 3:
A kind of production method of the water-retaining type release and release control fertilizer of biomass-based polymer capsule, comprising the following steps:
Step 1: weighing 300 g methyl ethyl carbonate rouge, and 50 ml glycerine and 7 ml phosphoric acid are uniformly mixed in three-necked flask, rise
Temperature is to the smashed rice husk of 100g is added after 200 DEG C, and in ice after taking out liquefaction products after 60 min of constant temperature agitating and heating
It is quickly cooled down in water-bath, terminates reaction, obtain coating liquid A, it is spare；
Step 2: being added dropwise the sodium hydroxide solution of 5 mol/L under conditions of ice-water bath into 20 g acrylic acid, adjusts acrylic acid
Degree of neutralization is to 75%；It weighs the smashed rice husk of 10.0 g to be added in three-necked flask, 20 ml distilled water, 85 DEG C of heating water baths is added
The acrylic acid after neutralizing is added in 30 min, stirs initiator potassium persulfate and crosslinking agent N, N'- di-2-ethylhexylphosphine oxide third after 2 min
Acrylamide is dissolved in respectively in 2 ml distilled water, is successively slowly added in three-necked flask, controls 85 DEG C of temperature, water bath with thermostatic control continues to stir
It mixes to gel is become, keeps the temperature 90 min；It is crushed after portion of product is taken out 85 DEG C of vacuum oven drying, it is spare；
Step 3: 1 kg potassium chloride particle is packed into rotary drum coating machine, is heated to 85 DEG C；Then 80 DEG C of 4.99g will be preheating to
Methyl diphenylene diisocyanate, 4.99 g coating liquid A and 0.02g diethylenetriamines spray to rapidly potassium chloride particle table simultaneously
Face can be repeated 5 times to obtain biomass film-coated controlled release fertilizer after 5-6 minutes in fertiliser granulates surface film-forming, this process；So
The gelatinous water-retaining agent of 15 g is added in rotary drum afterwards, attaches it uniformly in fertiliser granulates surface, while 150 g powder are added
The water-absorbing resins of last shape form the water-retaining type release and release control fertilizer of biomass-based polymer capsule through rolling film forming.
Embodiment 4:
A kind of production method of the water-retaining type release and release control fertilizer of biomass-based polymer capsule, the first step and second step and embodiment
3 is identical, and this will not be repeated here；
Step 3: the urea granules that 1 kg diameter is 2-4 mm are packed into rotary drum coating machine, are heated to 85 DEG C；Then it will be preheating to
80 DEG C of 4.99g methyl diphenylene diisocyanate, coating liquid A and the 0.02g diethylenetriamine of 4.99 g embodiments 3 preparation
Potassium chloride particle surface is sprayed to rapidly simultaneously, can repeat 2 in fertiliser granulates surface film-forming, this process after 5-6 minutes
It is secondary to obtain biomass film-coated controlled release fertilizer；Then the gelatinous water-retaining agent prepared by 5 g embodiments 3 is added in rotary drum, makes it
It uniformly attaches in fertiliser granulates surface, while the powdered water-absorbing resins of 50 g embodiments 3 preparation is added, rolled into
Film forms the water-retaining type release and release control fertilizer of biomass-based polymer capsule.
In summary: a kind of the water-retaining type release and release control fertilizer and its producer of biomass-based polymer capsule provided by the invention
Method, by raw material: biomass, liquefier, catalyst, coating liquid B, curing agent, reaction monomers, initiator and crosslinking agent are by weight
Not only there is the water-retaining type release and release control fertilizer for the biomass-based polymer capsule that number proportion is prepared the control of accurate nutrient to release
Performance is put, nutrient release control period can control at 1 month to 12 months；And there is preferable moisture to protect accumulation of energy power, water suction
Multiplying power can control in 50-200 g/g, and in the northern area of China, especially northern rain-fed agriculture region production has preferable application
Prospect；In addition, improving membrane material since nutrient controlled release layer and water conservation film material take full advantage of renewable biomass resources
The degradation property of material in the soil, reduces dependence of the coated fertilizer to fossil resources, realizes the sustainable development of coated fertilizer
Exhibition is very suitable for being mass produced and promote.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of water-retaining type release and release control fertilizer of biomass-based polymer capsule, which is characterized in that matched including following parts by weight
Raw material: 20-60 parts of biomass, 100 parts of liquefier, 1-5 parts of catalyst, 40-60 parts of coating liquid B, 3-5 parts of curing agent, reaction
40-100 parts of monomer, 1-2 parts of initiator, 1-2 parts of crosslinking agent.
2. a kind of water-retaining type release and release control fertilizer of biomass-based polymer capsule according to claim 1, which is characterized in that former
Material: biomass is agricultural crop straw, peanut shell, husk, rice husk, waste paper, leaf, reed, sawdust, bagasse, waste cotton wadding, discards
The mixture of one or more of starch, bark, the leaf of bamboo.
3. a kind of water-retaining type release and release control fertilizer of biomass-based polymer capsule according to claim 1, which is characterized in that former
Material: liquefier is one or more mixtures of ethylene carbonate, propene carbonate, sweet glycol, ethylene glycol or glycerine.
4. a kind of water-retaining type release and release control fertilizer of biomass-based polymer capsule according to claim 1, which is characterized in that former
Material: coating liquid B be isophorone diisocyanate, toluene di-isocyanate(TDI), methyl diphenylene diisocyanate, dicyclohexyl
The mixture of one or more of methane diisocyanate or hexamethylene diisocyanate.
5. a kind of water-retaining type release and release control fertilizer of biomass-based polymer capsule according to claim 1, which is characterized in that former
Material: curing agent is one or more of diethylenetriamines, trien, tetren and polyethylene polyamine
Mixture.
6. a kind of water-retaining type release and release control fertilizer of biomass-based polymer capsule according to claim 1, which is characterized in that former
Material: reaction monomers are that acrylic acid is mixed with the one or two of acrylamide with any ratio.
7. a kind of water-retaining type release and release control fertilizer of biomass-based polymer capsule according to claim 1, which is characterized in that former
Material: initiator is one or more of potassium peroxydisulfate, ammonium persulfate, ammonium ceric nitrate and persulfate with any ratio mixing.
8. a kind of water-retaining type release and release control fertilizer of biomass-based polymer capsule according to claim 1, which is characterized in that former
Material: one or more of crosslinking agent N, N'- methylene-bisacrylamide, borax, boric acid and boracic organic matter are arbitrarily to compare
Mixing.
9. a kind of production method of the water-retaining type release and release control fertilizer of biomass-based polymer capsule according to claim 1,
It is characterized in that, comprising the following steps:
Step 1): it is reacted after 20-60 parts of biomass are uniformly mixed with 100 parts of liquefiers, 1-5 parts of catalyst through 150-200 DEG C
2-3h obtains biomass coating liquid A after products therefrom is cooling；Then by A, 40-60 parts of coating liquids of 40-60 parts of biomass coating liquids
B, which is sprayed to 3-5 parts of curing agent simultaneously on the fertiliser granulates of preheating, reacts film-forming, obtains biomass coating controlled-release fertilizer
Material；
Step 2: 20-50 parts of biomass, 40-100 parts of reaction monomers, 1-2 parts of initiators and 1-2 parts of crosslinking agents are uniformly mixed
Gel water-absorbing resin is obtained through graft polymerization reaction at 50-90 DEG C afterwards；Partial gel shape product drying, cooling, crushing
After obtain powdered water-absorbing resin；
Step 3): 5-10 parts of gel water-absorbing resins and 50-100 parts of powdered water-absorbing resins are added respectively in proportion in rotary drum
Enter into step 1) biomass film-coated controlled release fertilizer particle surface, form a film through rotation, forms the smooth biomass-based polymerization in surface
The water-retaining type release and release control fertilizer of object coating.
10. a kind of production method of the water-retaining type release and release control fertilizer of biomass-based polymer capsule according to claim 9,
It is characterized in that, the coated fertilizer quality in the step 1) accounts for the 3%-5% of fertilizer gross mass；Coating material in the step (3)
Material quality accounts for the 10%-15% of fertilizer gross mass.
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| CN111345221A (en) * | 2020-02-12 | 2020-06-30 | 遵义师范学院 | Preparation method of slow release fertilizer aiming at difference of water retention performance of karst mountain land |
| CN115043688A (en) * | 2022-06-20 | 2022-09-13 | 华南农业大学 | Organic silicon modified activated lignin-based coating material and preparation method thereof, and coated fertilizer |
| CN115448794A (en) * | 2022-09-20 | 2022-12-09 | 安徽司尔特化肥科技有限公司 | Preparation and coating method of controlled-release fertilizer coating material |
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| CN108516899A (en) * | 2018-06-25 | 2018-09-11 | 山东农业大学 | A kind of functional form slow-release or control-release fertilizer core and preparation method thereof based on biological based binder |
| CN111345221A (en) * | 2020-02-12 | 2020-06-30 | 遵义师范学院 | Preparation method of slow release fertilizer aiming at difference of water retention performance of karst mountain land |
| CN115043688A (en) * | 2022-06-20 | 2022-09-13 | 华南农业大学 | Organic silicon modified activated lignin-based coating material and preparation method thereof, and coated fertilizer |
| CN115448794A (en) * | 2022-09-20 | 2022-12-09 | 安徽司尔特化肥科技有限公司 | Preparation and coating method of controlled-release fertilizer coating material |
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Application publication date: 20190607 |