CN107162747A - A kind of preparation method of multi-functional composite aquogel slow release fertilizer - Google Patents
A kind of preparation method of multi-functional composite aquogel slow release fertilizer Download PDFInfo
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- CN107162747A CN107162747A CN201710435632.4A CN201710435632A CN107162747A CN 107162747 A CN107162747 A CN 107162747A CN 201710435632 A CN201710435632 A CN 201710435632A CN 107162747 A CN107162747 A CN 107162747A
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- Prior art keywords
- water
- urea
- galapectite
- release fertilizer
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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
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C3/00—Fertilisers containing other salts of ammonia or ammonia itself, e.g. gas liquor
-
- 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
- C05G5/10—Solid or semi-solid fertilisers, e.g. powders
- C05G5/12—Granules or flakes
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Fertilizers (AREA)
Abstract
The invention belongs to water conservation sustained-controll-release fertiliser field, a kind of preparation method of the water conservation sustained-controll-release fertiliser based on cellulose, galapectite and cyclodextrin is specifically disclosed：In the aqueous solution of urea, cellulose derivative, polymerizable cyclodextrin are added, water-soluble monomer, galapectite, crosslinking agent, the initiator for loading urea are then heated to certain temperature, generation Raolical polymerizable, obtains a kind of new water conservation sustained-controll-release fertiliser.The water conservation sustained-controll-release fertiliser make use of the special tubular structure of inclusion and galapectite of the cyclodextrin to urea, urea is there are a variety of interactions with carrier, so as to show special release performance, simultaneously, with certain water-retaining property and degradability, preparation method is simple, and application prospect is extensive.
Description
Technical field
The invention belongs to water conservation sustained-controll-release fertiliser technical field, and in particular to prepared by radical polymerization and contain galapectite
And the multi-functional Water-retaining slow-release fertilizer of cyclodextrin.
Background technology
Chemical fertilizer is made that significant contribution for agricultural volume increase, meanwhile, fertilising also causes pollution to environment and crops, increases
The cost of agricultural production.Therefore, how to improve the utilization rate of fertilizer, reduce the important class that fertilizer application frequency is studied into people
Topic, this promotes the exploitation of various slow release fertilizers and application.On the other hand, water is also the key factor for restricting agricultural development.
Moisture not only directly affects plant growth, and the performance of fertilizer efficiency is also played an important role.Quite a few arable land of China is
Nonirrigated farmland, pours relatively difficult, and the water demand of natural precipitation and crop growth is also incompatible, therefore, people study
Various water-loss reducers are developed, to improve the utilization rate of water resource.
In recent years, water-loss reducer is combined together by people with sustained-controll-release fertiliser, have developed Water-retaining slow-release fertilizer, to realize
Liquid manure is mutually promoted, the physical property for improving soil, the utilization rate for improving fertilizer nutrient, reduction irrigation frequency, and this is currentization
The main trend of fertile industrial development, is also developing modern agriculture, the inevitable requirement of the Implement of sustainable development strategy.
However, also there are many problem urgent need to resolve, such as, obtained fertilizer in water conservation sustained-controll-release fertiliser research field at present
Expect that cost is high, the rate of release of fertilizer and the growth needs of crops are inconsistent, it is difficult to degraded etc..It is known that cellulose is
Content most abundant polysaccharide, renewable biodegradable on the earth, is most potential green material（Kang Hongliang, Liu Ruigang,
The progress of yellow brave cellulose base functional materials, macromolecule circular, 2016,9: 87-98）, and galapectite is natural
Nanotube, have higher reserves in nature, cost is relatively low, people have carried out one to its application in terms of pharmaceutical carrier
It is a little explore (Yi Kui, Luo Sihai, Chen Tao, wait halloysite nanotubes as the progress of carrier, Shanghai Plastic,
2012, 4：1-5).In addition, cyclodextrin is the significant subject compound of host-guest chemistry research, there is hydrophobic sky inside it
Chamber, and outside has hydrophily, micromolecular compound or polymer can enter its internal cavities by hydrophobic interaction, pass through
(Shen Haimin, square haw, Wu Hongke wait the molecular conformation and its structure of cyclodextrine derivatives to Supramolecular self assembly formation inclusion compound
Build Strategy Research Progress, chemical industry progress, 2015,34 (2): 430-446).
Based on this, cellulose, galapectite and cyclodextrin are introduced into Water-retaining slow-release fertilizer system by we, have developed one kind
New Water-retaining slow-release fertilizer, to meet the demand of agricultural production.
The content of the invention
Present invention aims at a kind of new method for preparing composite water conservation slow release fertilizer is provided, to improve the release of fertilizer
Journey, improves the utilization rate of fertilizer, saving water resource is that the sustainable development of agricultural contributes.
To reach above-mentioned purpose, the present invention utilizes natural polysaccharide fiber element, natural nano pipe galapectite, host compound ring
Dextrin, water-soluble monomer, crosslinking agent, initiator, Water-retaining slow-release fertilizer has been prepared by radical polymerization.
Concrete technical scheme is achieved by the steps of：
（1）Urea is added in water, is dissolved by heating, by controlling the addition of urea to control the concentration of solution, further control
The content of urea in carrier；
（2）Water-soluble cellulose derivative is added, sodium carboxymethylcellulose, hydroxypropyl cellulose, hydroxypropyl methyl is can select fine
One or both of element is tieed up, by controlling the addition of cellulose derivative to control the performance of carrier；
(3) water-soluble monomer is added, water-soluble monomer selects methacrylic acid, acrylic acid, itaconic acid, maleic acid, acrylamide
Or the one or more in N hydroxymethyl acrylamide etc.；
（4）Add the polymerizable cyclodextrin modified through maleic anhydride or itaconic anhydride；
（5）Galapectite is subjected to acid or alkali process, can also be chemically modified, be then placed in the aqueous solution of urea of high concentration,
By vacuumizing loading urea, the useful load of urea is calculated after suction filtration, washing, drying, is added into above-mentioned solution；
（6）Water soluble starter and crosslinking agent are added, initiator selects the oxygen such as persulfate, or persulfate-vitamin C system
Change reduction initiating system, crosslinking agent selects N, and N- methylene-bisacrylamides, polyethylene glycol dimethacrylate etc. is dissolved in
The compound of water；
（7）It is sufficiently mixed by ultrasound or stirring, heating polymerization uses different polymerization temperatures according to system is triggered；
（8）Dry, crush, granulate, obtain composite water conservation sustained-controll-release fertiliser.
Beneficial effect of the present invention：Cellulose, galapectite and cyclodextrin are introduced in system, makes urea in system in not
Same position, the active force of each position is different, so that urea is discharged according to different speed, to meet different crops
The demand of different growing stages.By changing inventory, the performance of polymer and the urea content of carrier, and then conditioned fertilizer product are adjusted
Water-absorbing-retaining and release performance.
The water conservation sustained-controll-release fertiliser of gained is the hydrophilic compounds thing network of organo-mineral complexing, is made with water-absorbing-retaining
With, water resource can be made to be fully used, another aspect, in fertilizer, urea may be present in hydrogel network, nanotube angstrom
In Lip river stone surface, galapectite pipe, in the cavity of cyclodextrin, the unlocking resistance of diverse location is different, so that urea has different
Rate of release, meets the requirement of crops different growing stages.
Brief description of the drawings
Fig. 1 is the urea cumulative release of the Water-retaining slow-release fertilizer prepared by the embodiment of the present invention 1（A）And be swelled（B）It is bent
Line；
Fig. 2 is the urea cumulative release of the Water-retaining slow-release fertilizer prepared by the embodiment of the present invention 2（A）And be swelled（B）Curve；
Fig. 3 is the urea cumulative release of the Water-retaining slow-release fertilizer prepared by the embodiment of the present invention 3（A）And be swelled（B）Curve；
Fig. 4 A are the urea cumulative release curve of the Water-retaining slow-release fertilizer prepared by the embodiment of the present invention 4；
Fig. 4 B are the urea cumulative release curve of the Water-retaining slow-release fertilizer prepared by the embodiment of the present invention 5；
Fig. 5 is the halloysite nanotubes raw material used in the present invention（It is left）And the halloysite nanotubes after acidifying（It is right）Transmission electricity
Mirror picture.
Embodiment
Embodiment 1
The mL of 1% cmc soln 5.0 is added in beaker, the g of urea 2.000, acrylamide is then sequentially added
The g of 1.792 g, maleic anhydride modification cyclodextrin 0.208 g, N, N- methylene-bisacrylamide 0.043, ammonium persulfate is molten
The mL of liquid 1.0, the mL of vitamin c solution 1.0, increase the temperature to 60 DEG C after being sufficiently mixed, react 0.1 hour, obtain water-holding slow-release
Fertilizer, it is swelled and elution profiles are as shown in Figure 1.
Embodiment 2
The mL of 1% cmc soln 5.0 is added in beaker, the g of urea 2.000, acrylamide is then sequentially added
1.792 g, the g of modification cyclodextrin 0.208, load the g of galapectite 1.200 of urea（Urea useful load 12.7%）, N, N- methylene
The g of bisacrylamide 0.043, ammonium persulfate solution 1.0 mL, vitamin c solution 1mL, increases the temperature to 60 DEG C after being sufficiently mixed,
Reaction 0.2 hour.Water-retaining slow-release fertilizer is obtained, it is swelled and elution profiles are as shown in Figure 2.
Embodiment 3
The mL of 1% cmc soln 5.0 in beaker, then sequentially adds the g of urea 2.50, the g of acrylamide 0.896,
The g of acrylic acid 1.000, the g of modification cyclodextrin 0.104, load the g of galapectite 0.570 of urea（Urea useful load 12.7%）, N, N-
The g of methylene-bisacrylamide 0.0273, the 0mL of ammonium persulfate solution 1., the mL of vitamin c solution 1.0, are raised after being sufficiently mixed
Temperature is reacted 0.2 hour to 60 DEG C.Water-retaining slow-release fertilizer is obtained, it is swelled and elution profiles are as shown in Figure 3.
Embodiment 4
The mL of 1% cmc soln 5.0 is added in beaker, the g of urea 2.00, acrylamide is then sequentially added
1.792g, the g of modification cyclodextrin 0.208, load the acidifying galapectite 1.58g of urea（Urea useful load 36.7%）, N, N- methylenes
Base bisacrylamide 0.043g, the mL of ammonium persulfate solution 1.0, the mL of vitamin c solution 1.0, are increased the temperature to after being sufficiently mixed
40 DEG C, react 1 hour.Water-retaining slow-release fertilizer is obtained, its elution profiles is as shown in Figure 4 A.
Embodiment 5
The mL of 1% cmc soln 5.0 is added in beaker, the g of urea 2.5, acrylamide 0.896 is then sequentially added
G, acrylic acid 1.00 g, modification cyclodextrin 0.104g, load the acidifying galapectite 0.7g of urea（Urea useful load 36.7%）, N,
N- methylene-bisacrylamides 0.0273g）, ammonium persulfate solution 1.0 mL, vitamin c solution 1mL raise temperature after being sufficiently mixed
Spend to 40 DEG C, react 1 hour.Water-retaining slow-release fertilizer is obtained, its elution profiles is as shown in Figure 4 B.
Above case study on implementation is merely to illustrate the preferred embodiment of the present invention, but the present invention is not limited to above-mentioned embodiment party
Formula, in the knowledge that the field those of ordinary skill possesses, that is made within the spirit and principles in the present invention is any
Modification, equivalent substitute and improvement etc., are regarded as the protection domain of the application.
Claims (5)
1. a kind of preparation method of multi-functional composite water conservation slow release fertilizer, it is characterised in that：It is achieved by the steps of：（1）
Urea is added in water, is dissolved by heating；（2）Water-soluble cellulose derivative is added, from sodium carboxymethylcellulose, hydroxy propyl cellulose
Element, hydroxypropyl methyl cellulose etc.；(3) add water-soluble monomer, water-soluble monomer select methacrylic acid, acrylic acid, itaconic acid,
One or more in maleic acid, acrylamide or N hydroxymethyl acrylamide etc.；（4）Add through modifying obtained polymerizable ring
Dextrin；（5）Add the galapectite for being mounted with urea；（6）Water soluble starter and crosslinking agent are added, initiator selects persulfuric acid
Salt, or the redox initiation system such as persulfate-vitamin C system, crosslinking agent select N, and N- methylene-bisacrylamides gather
Ethylene glycol dimethacrylate；（7）Heat up polymerization after being sufficiently mixed；（8）Dry, crush, granulate, obtain the slow control of composite water conservation
Release fertilizer.
2. the preparation method of multi-functional Water-retaining slow-release fertilizer according to claim 1, it is characterised in that：Step（1）In can root
It is actually needed according to different, adjusts urea content.
3. the preparation method of multi-functional Water-retaining slow-release fertilizer according to claim 1, it is characterised in that：Step（4）In ring
The preferred cheap beta-schardinger dextrin of dextrin, double bond, cyclodextrin are introduced using the modification of the reagents such as maleic anhydride, itaconic anhydride
The number of upper double bond can be controlled by changing rate of charge.
4. the preparation method of multi-functional Water-retaining slow-release fertilizer according to claim 1, it is characterised in that：Step（5）, Ai Luo
Stone can be handled by acid or alkali, can also be chemically modified, the galapectite of galapectite or modified is put into various concentrations
Aqueous solution of urea in, vacuumize at least 5 times, vacuumize every time 2-5 minutes, intermediate hold 1-3 minutes, in favor of in galapectite
Chamber loads urea as much as possible；The different galapectite of urea content is obtained after suction filtration, washing, drying.
5. the preparation method of multi-functional Water-retaining slow-release fertilizer according to claim 1, it is characterised in that：Charging will after finishing
Stop 1-3 minute simultaneously be sufficiently stirred for or ultrasound, in favor of material be well mixed and urea and cyclodextrin inclusion；Use potassium peroxydisulfate
Or ammonium persulfate initiation when temperature control at 65-80 DEG C；With temperature during the redox initiation systems such as ammonium persulfate-vitamin C
Control is at 30-56 DEG C；Reaction time was controlled at 0.1-2 hours.
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Cited By (7)
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| CN107517839A (en) * | 2017-10-10 | 2017-12-29 | 长沙爱扬医药科技有限公司 | A kind of Seeds of Dendrobium Candidum carries out method for culturing seedlings |
| CN111264317A (en) * | 2019-12-06 | 2020-06-12 | 庆元县枫陌生态农业开发有限公司 | Chenopodium quinoa willd planting method in east China |
| CN112142521A (en) * | 2020-10-06 | 2020-12-29 | 青岛一亩地农业科技有限责任公司 | Environment-friendly multielement slow-release fertilizer and preparation method thereof |
| CN112624865A (en) * | 2020-12-31 | 2021-04-09 | 龙蟒大地农业有限公司 | Water-retention slow-release fertilizer and preparation method thereof |
| CN112707766A (en) * | 2021-01-06 | 2021-04-27 | 南京林业大学 | Preparation method of degradable pH-responsive nanocellulose-based hydrogel slow-release fertilizer |
| US20220135791A1 (en) * | 2020-10-29 | 2022-05-05 | Industrial Technology Research Institute | Biodegradable material and method for preparing the same |
| CN115286456A (en) * | 2022-08-24 | 2022-11-04 | 广东海洋大学 | Preparation method and application of water-retention slow-release compound fertilizer |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107517839A (en) * | 2017-10-10 | 2017-12-29 | 长沙爱扬医药科技有限公司 | A kind of Seeds of Dendrobium Candidum carries out method for culturing seedlings |
| CN111264317A (en) * | 2019-12-06 | 2020-06-12 | 庆元县枫陌生态农业开发有限公司 | Chenopodium quinoa willd planting method in east China |
| CN112142521A (en) * | 2020-10-06 | 2020-12-29 | 青岛一亩地农业科技有限责任公司 | Environment-friendly multielement slow-release fertilizer and preparation method thereof |
| US20220135791A1 (en) * | 2020-10-29 | 2022-05-05 | Industrial Technology Research Institute | Biodegradable material and method for preparing the same |
| CN112624865A (en) * | 2020-12-31 | 2021-04-09 | 龙蟒大地农业有限公司 | Water-retention slow-release fertilizer and preparation method thereof |
| CN112624865B (en) * | 2020-12-31 | 2022-03-25 | 龙蟒大地农业有限公司 | Water-retention slow-release fertilizer and preparation method thereof |
| CN112707766A (en) * | 2021-01-06 | 2021-04-27 | 南京林业大学 | Preparation method of degradable pH-responsive nanocellulose-based hydrogel slow-release fertilizer |
| CN112707766B (en) * | 2021-01-06 | 2021-12-24 | 南京林业大学 | Preparation method of degradable pH-responsive nanocellulose-based hydrogel slow-release fertilizer |
| CN115286456A (en) * | 2022-08-24 | 2022-11-04 | 广东海洋大学 | Preparation method and application of water-retention slow-release compound fertilizer |
| CN115286456B (en) * | 2022-08-24 | 2024-04-09 | 广东海洋大学 | Preparation method and application of water-retention slow-release compound fertilizer |
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