CN111138163A - Effective component slow-release ceramsite and preparation method thereof - Google Patents
Effective component slow-release ceramsite and preparation method thereof Download PDFInfo
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- CN111138163A CN111138163A CN202010018466.XA CN202010018466A CN111138163A CN 111138163 A CN111138163 A CN 111138163A CN 202010018466 A CN202010018466 A CN 202010018466A CN 111138163 A CN111138163 A CN 111138163A
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- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
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- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
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- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3427—Silicates other than clay, e.g. water glass
- C04B2235/3463—Alumino-silicates other than clay, e.g. mullite
- C04B2235/3472—Alkali metal alumino-silicates other than clay, e.g. spodumene, alkali feldspars such as albite or orthoclase, micas such as muscovite, zeolites such as natrolite
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- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
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- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
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Abstract
The invention discloses an active ingredient slow-release ceramsite and a preparation method thereof, wherein the active ingredient slow-release ceramsite is an active ingredient slow-release ceramsite which takes a slow-release substance as an inner core and is coated with an inorganic material to form a shell, the prepared slow-release substance is pretreated and then added with an auxiliary material to prepare the inner core, the inner core is coated with the inorganic material through a disc type granulator and then sintered or maintained, and after the sintering or maintenance is finished, the surface treatment can be carried out according to the use environment or the slow-release requirement of the inner core to prepare the active ingredient slow-release ceramsite; according to the invention, the inorganic material with the porous characteristic is used as the shell, and then the core formed by the sustained-release substance is coated, so that the active ingredients of the sustained-release substance in the core can be exuded at a certain speed by changing the porosity, the pore diameter and the surface treatment according to different application scenes, and the liquid outside the core can slowly permeate into the core, so that the sustained-release substance in the core is dissolved into the environment, and the long-term effective purpose is achieved.
Description
Technical Field
The invention relates to the technical field of new material production, in particular to an active ingredient slow-release ceramsite and a preparation method thereof.
Background
The slow release technology adopts specific measures to slow down the release of specific active substances within a certain time so as to ensure that the specific active substances maintain a certain effective concentration in a system, and the active substances in the system have long action time and high utilization rate, so that the slow release product has environmental protection and stability. The slow release technology is earlier applied to the research and development of medicines in the medical field, and then is gradually applied to the fields of chemical fertilizers, pesticides, chemical engineering and the like. Generally, according to whether a chemical reaction occurs between an active component and a slow release agent, the active component and the slow release agent are divided into a physical slow release system and a chemical slow release system, wherein the physical slow release system is mainly applied to the agricultural field, and pesticides are coated in materials such as attapulgite, fly ash and biomass charcoal, so that the pesticides can keep a certain release amount for a certain time, and a great amount of loss of the pesticides caused by natural environmental factors such as wind, sunshine, rain and the like is avoided; in the medical field, the slow release material is used as a component, a membrane material and a framework for drug delivery, the drug is delivered to a diseased part at a certain speed, a certain concentration is maintained in the body, the drug is released at a focus part, and the due effect of the drug is achieved; the chemical slow release system is mainly applied in the field of environmental management, for example, the slow release type K is used2FeO4In combination with H2O2The research shows that the slow-release K is used for oxidizing and degrading the landfill leachate at the late stage2FeO4Compared with potassium ferrate, the potassium ferrate has stronger stability under acidic condition, higher removal effect on percolate and sustained-release K2FeO4And H2O2Has synergistic effect and can improve the removal rate of COD and Cr by 15 percent.
The slow release technology is a crossed research field, is mainly applied to the field of medicines insensitive to price or agricultural fertilizers with low requirements on product effects at present, and has wide development prospect on how to apply the slow release technology to the technical field of ceramsite preparation, so that the invention provides the slow release ceramsite containing the effective components and the preparation method thereof, and aims to solve the defects in the prior art.
Disclosure of Invention
In order to solve the problems, the invention aims to provide the active ingredient slow-release ceramsite and the preparation method thereof.
In order to realize the purpose of the invention, the invention is realized by the following technical scheme:
the slow-release ceramsite containing the effective components is prepared by taking a slow-release substance as an inner core and coating an inorganic material outside the inner core to form a shell.
The further improvement lies in that: the inorganic material includes but is not limited to inorganic material or inorganic gelled material which can be formed by firing, and the inorganic material which can be formed by firing includes but is not limited to any one or mixture of clay, sludge, coal gangue, feldspar or quartz, any one or mixture of ordinary portland cement, aluminate cement, slag cement, fly ash cement, chemical excitation energy-saving material and the like.
The further improvement lies in that: the sustained-release substance includes but is not limited to any one of inorganic salt including but not limited to any one of sodium oxide, sodium chloride, sodium carbonate, barium hydroxide or calcium hexafluorophosphate or inorganic oxide including but not limited to any one of calcium oxide or silicon dioxide.
A preparation method of active ingredient slow-release ceramsite comprises the following steps:
the method comprises the following steps: preparing a sustained-release substance, pretreating the sustained-release substance, adding an auxiliary material into the sustained-release substance, and preparing the core by an extrusion method or a disc granulation method;
step two: and (3) wrapping an inorganic material outside the inner core by using a disc type granulator, standing, then carrying out sintering or maintenance treatment, and then carrying out surface treatment by dipping an organic high molecular polymer according to the use environment or the slow release requirement, so as to strengthen or weaken the seepage of the slow-release substance and obtain the effective component slow-release ceramsite with the core-shell structure.
The further improvement lies in that: the auxiliary material in the first step is an auxiliary material with high plasticity, and the auxiliary material includes, but is not limited to, starch or kaolin.
The further improvement lies in that: the organic high molecular polymer in the second step includes, but is not limited to, wax, polyvinyl alcohol, or epoxy resin.
The further improvement lies in that: the effective component slow-release ceramsite with the core-shell structure in the step two is effective component slow-release ceramsite with a single-layer core-shell structure or a multi-layer core-shell structure.
The invention has the beneficial effects that: the invention uses inorganic material with porous characteristic as shell, then coats the inner core formed by slow-release substance, can change porosity, aperture and surface treatment mode according to different application scenes, the effective component of the slow-release substance in the inner core seeps out at a certain speed, and can also make the liquid outside the inner core slowly seep into the inner core, and make the slow-release substance in the inner core dissolve into the environment, thus achieving the purpose of long-term effectiveness.
Drawings
FIG. 1 is a schematic flow chart of the preparation method of the present invention.
FIG. 2 is a schematic structural diagram of the slow-release ceramsite containing the effective components prepared by the method of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
As shown in fig. 1 and 2, this embodiment provides a method for preparing ceramsite with slow release of active ingredients, which includes the following steps:
the method comprises the following steps: putting 500g of accurately weighed barium chloride into a disc pelletizer for pelleting to prepare an inner core with the diameter of 0.5 mm;
step two: the prepared inner core is moved into another balling disk, the mixture of clay and potassium feldspar is coated on the surface of the inner core (the mixing ratio is 1: 1), a ceramsite green body with the diameter of 1mm and a single-layer core-shell structure is obtained, the ceramsite green body with the single-layer core-shell structure is aged for 6 hours, and the ceramsite green body with the single-layer core-shell structure is sintered after the aging is finished, wherein the sintering system is as follows: heating to 600 deg.C at a rate of 12 deg.C/min, maintaining for 5min, heating to 1050 deg.C at a rate of 10 deg.C/min, and maintaining for 15 min; then naturally cooling to below 50 ℃ to obtain the slow-release ceramsite containing the active ingredients.
Example two
As shown in fig. 1 and 2, this embodiment provides a method for preparing ceramsite with slow release of active ingredients, which includes the following steps:
the method comprises the following steps: grinding and drying 500g of accurately weighed calcium hydroxide, and then placing the calcium hydroxide into a disc pelletizer for pelleting to prepare an inner core with the diameter of 2 mm;
step two: and transferring the prepared inner core into another balling disc, coating mixed slurry of fly ash cement, cement and expanded perlite on the surface of the inner core, wherein the mixing ratio of the fly ash cement, the cement and the expanded perlite is 10: 1: 4 to obtain a ceramsite blank with a single-layer core-shell structure and a diameter of 4mm, curing the ceramsite blank with the single-layer core-shell structure for 28 days according to a cement curing standard, immersing the ceramsite into 5% polyvinyl alcohol before use, taking out the ceramsite after 5 seconds, and drying to obtain the slow-release ceramsite with the effective components.
The performance of the active ingredient slow-release ceramsite prepared in the first embodiment and the second embodiment is detected, and the detection result shows that: in the first embodiment, the effective component sustained-release ceramsite has the cylinder pressure strength of 5.6MPa and the bulk density of 0.978 × 103kg/m3The barium chloride exudation rate is 0.012 mg/d.g; in the second embodiment, the cylinder pressure strength of the slow-release ceramsite containing the active ingredients is 2.6MPa, and the bulk density is 1.274 multiplied by 103kg/m3The calcium hydroxide bleeding rate was 0.023 mg/d.g.
The invention uses inorganic material with porous characteristic as shell, then coats the inner core formed by slow-release substance, can change porosity, aperture and surface treatment mode according to different application scenes, the effective component of the slow-release substance in the inner core seeps out at a certain speed, and can also make the liquid outside the inner core slowly seep into the inner core, and make the slow-release substance in the inner core dissolve into the environment, thus achieving the purpose of long-term effectiveness.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The active ingredient slow-release ceramsite is characterized in that: the active ingredient slow-release ceramsite is active ingredient slow-release ceramsite which takes a slow-release substance as an inner core and is coated with an inorganic material to form a shell.
2. The active ingredient slow-release ceramsite according to claim 1, wherein the ceramsite comprises: the inorganic material includes but is not limited to a fire-formable inorganic material or an inorganic gelled material, the fire-formable inorganic material includes but is not limited to any one or a mixture of clay, sludge, coal gangue, feldspar or quartz, and the inorganic gelled material includes but is not limited to any one or a mixture of ordinary portland cement, aluminate cement, slag cement, fly ash cement, a chemically excitable energetic material and the like.
3. The active ingredient slow-release ceramsite according to claim 1, wherein the ceramsite comprises: the sustained-release substance includes but is not limited to any one of inorganic salt including but not limited to any one of sodium oxide, sodium chloride, sodium carbonate, barium hydroxide or calcium hexafluorophosphate or inorganic oxide including but not limited to any one of calcium oxide or silicon dioxide.
4. A preparation method of active ingredient slow-release ceramsite is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps: preparing a sustained-release substance, pretreating the sustained-release substance, adding an auxiliary material into the sustained-release substance, and finally preparing the core by an extrusion method or a disc granulation method;
step two: and (3) wrapping an inorganic material outside the inner core by using a disc type granulator, standing, then carrying out sintering or maintenance treatment, and then carrying out surface treatment by dipping an organic high molecular polymer according to the use environment or the slow release requirement, so as to strengthen or weaken the seepage of the slow-release substance and obtain the effective component slow-release ceramsite with the core-shell structure.
5. The method for preparing ceramsite with slow release of active ingredients as claimed in claim 4, wherein the ceramsite is prepared by the following steps: the auxiliary material in the first step is an auxiliary material with high plasticity, and the auxiliary material includes, but is not limited to, starch or kaolin.
6. The method for preparing ceramsite with slow release of active ingredients as claimed in claim 4, wherein the ceramsite is prepared by the following steps: the organic high molecular polymer in the second step includes, but is not limited to, wax, polyvinyl alcohol, or epoxy resin.
7. The method for preparing ceramsite with slow release of active ingredients as claimed in claim 4, wherein the ceramsite is prepared by the following steps: the effective component slow-release ceramsite with the core-shell structure in the step two is effective component slow-release ceramsite with a single-layer core-shell structure or a multi-layer core-shell structure.
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| CN202010018466.XA CN111138163A (en) | 2020-01-08 | 2020-01-08 | Effective component slow-release ceramsite and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112552021A (en) * | 2020-12-09 | 2021-03-26 | 河南强耐新材股份有限公司 | Fly ash ceramsite and preparation method thereof |
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2020
- 2020-01-08 CN CN202010018466.XA patent/CN111138163A/en active Pending
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| DE69708085D1 (en) * | 1996-04-22 | 2001-12-13 | Rhone Poulenc Chimie | PRODUCTION OF PARTICLES CONTAINING CORE AND PACKAGING FROM SILICONIC ACID |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112552021A (en) * | 2020-12-09 | 2021-03-26 | 河南强耐新材股份有限公司 | Fly ash ceramsite and preparation method thereof |
| CN112552021B (en) * | 2020-12-09 | 2023-03-24 | 河南强耐新材股份有限公司 | Fly ash ceramsite and preparation method thereof |
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