CN109876734B - Core-shell spherical liquid drop preparation device and core-shell spherical liquid drop preparation method - Google Patents
Core-shell spherical liquid drop preparation device and core-shell spherical liquid drop preparation method Download PDFInfo
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Abstract
The invention relates to a core-shell spherical liquid drop preparation device and a core-shell spherical liquid drop preparation method, wherein the core-shell spherical liquid drop preparation device comprises a plurality of liquid storage bins, a spray head and a driving component; the plurality of liquid storage bins are used for storing the liquid to be prepared; the spray head comprises a plurality of coaxial liquid conveying pipes, and each liquid conveying pipe is communicated with the corresponding liquid storage bin and is used for forming multilayer coated spherical liquid drops; the driving part is used for controlling the flow speed of the liquid to be prepared in each infusion tube. The core-shell spherical liquid drop preparation device and the core-shell spherical liquid drop preparation method can be used for preparing a core-shell spherical liquid drop product coated with a plurality of layers of cores, and the thickness of each layer can be adjusted as required to realize taste adjustment.
Description
Technical Field
The invention relates to the technical field of liquid coating, in particular to a core-shell spherical liquid drop preparation device and a core-shell spherical liquid drop preparation method.
Background
With the increasing market demand for healthy and nutritious foods, the global demand for active ingredient-coated markets for foods and beverages is also growing dramatically. The active ingredients in the paste can be coated by adopting a granulation process, but the active ingredients in the liquid food, medicine and the like cannot be coated by the granulation process. At present, the liquid coating technology commonly used in the market is an orifice method, namely, a liquid dropping device is adopted to drop liquid drops into curing liquid, so that the surfaces of the liquid drops are cured to form a curing film to coat the liquid drops inside. Although the method can prepare the core-shell spherical liquid drops, the method can only coat one liquid, and can only coat the mixed liquid for forming products with various mixed tastes, so that the method is not convenient to adjust the proportion of each component in the mixed components and influence the taste.
Disclosure of Invention
Accordingly, it is necessary to provide a core-shell spherical droplet preparation apparatus and a core-shell spherical droplet preparation method. The core-shell spherical liquid drop preparation device and the core-shell spherical liquid drop preparation method can be used for preparing a core-shell spherical liquid drop product coated with multiple layers of cores, and the thickness of each core layer can be adjusted according to needs, so that the taste is adjusted.
A core-shell spherical liquid drop preparation device comprises a plurality of liquid storage bins, a spray head and a driving part;
the plurality of liquid storage bins are used for storing each liquid to be prepared;
the spray head comprises a plurality of coaxial liquid conveying pipes, and each liquid conveying pipe is communicated with the corresponding liquid storage bin;
the driving component is used for controlling the flow speed of the liquid to be prepared in each infusion tube.
In one embodiment, in any two adjacent infusion tubes, the output tube of the inner infusion tube located at the inner side protrudes out of the output tube of the outer infusion tube located at the outer side.
In one embodiment, in the plurality of coaxial infusion tubes, the distance h between the output ends of any two adjacent infusion tubes is not more than r along the direction of the central axis of the infusion tubes2-r1Wherein r is2The radius r of the outer layer transfusion tube positioned outside the two adjacent transfusion tubes1The radius of the inner layer transfusion tube positioned in the inner part of the two adjacent transfusion tubes.
In one embodiment, the core-shell spherical droplet preparation device further includes an optical coupler detector for detecting the particle size of the droplet ejected from the ejection head.
In one embodiment, the device further comprises a curing pool, wherein the curing pool is arranged opposite to the spray head and is used for forming a curing film on the surface of the liquid drop.
The method for preparing the core-shell spherical liquid drop by adopting the device for preparing the core-shell spherical liquid drop comprises the following steps:
preparing each liquid to be prepared;
adding the prepared liquid to be prepared into the corresponding liquid storage bin;
and adjusting the driving part to control the flow speed of each liquid to be prepared in the infusion tube.
In one embodiment, the flow rate of the liquid to be prepared in any two adjacent liquid conveying tubes satisfies the following formula: v. of1/v2＝(R3-r3)/r3Wherein v is1Indicating the flow rate, v, of the liquid to be prepared in the outer infusion tube2The flow rate of the liquid to be prepared in the inner-layer infusion tube is shown, R is the radius of the outer-layer infusion tube positioned at the outer side, and R is the radius of the inner-layer infusion tube positioned at the inner side.
In one embodiment, the preparation method further includes a step of adding a curing liquid into the curing tank, and the curing liquid is added to satisfy the following requirements:
h is less than or equal to 1.5d, wherein d represents the diameter of the liquid drop sprayed out of the spray head, and h represents the vertical distance between the end part of the output pipe of the infusion pipe at the innermost layer of the spray head and the liquid level of the solidified liquid.
In one embodiment, the solidifying liquid is a calcium ion solution with the mass percentage of 0.5% -2%;
the liquid to be prepared in the outermost layer of the transfusion tube contains 0.5-2% of sodium alginate solution by mass percent.
In one embodiment, the absolute viscosity of the liquid to be prepared is greater than or equal to 128 cP.
The core-shell spherical liquid drop preparation device is provided with a plurality of coaxial infusion tube nozzles, and the infusion tubes are communicated with the corresponding liquid storage bins, so that the liquid drops with the multilayer coated core-shell structure can be formed under the action of each infusion tube. And the device is also provided with a driving part to control the flow speed of liquid in each liquid conveying pipe, so that the thickness of each layer of the formed core-shell liquid drops can be controlled, and the adjustment of the product structure is realized.
In addition, the core-shell spherical liquid drop preparation device can be used for preparing spherical particle products without a spherical mold for membrane pouring, the preparation process is simple, higher technical requirements are not needed, the production cost is lower, and the application value is higher.
Drawings
FIG. 1 is a schematic view of a core-shell spherical droplet preparation apparatus of an embodiment;
in fig. 2, a is a schematic view and a bottom view of a spray head comprising two infusion tubes, and b is a schematic view and a bottom view of a spray head comprising three coaxial infusion tubes;
fig. 3 is a schematic view of a head of the core-shell spherical droplet preparation apparatus shown in fig. 1.
Detailed Description
In order that the invention may be more fully understood, a more particular description of the invention will now be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The core-shell spherical droplet preparation apparatus 10 according to an embodiment of the present invention includes a plurality of reservoirs 101, a head 102, and a driving unit 103. Wherein a plurality of reservoirs 101 are used for storing each liquid to be prepared. The shape and size of the reservoirs 101 are not particularly limited, but the reservoirs are preferably the same size and are arranged in order of the corresponding layers in the formed core-shell spherical droplets. For example: the core-shell spherical liquid droplet preparation device comprises n liquid storage bins, namely a first liquid storage bin 1011, a second liquid storage bin 1012 and an nth liquid storage bin 1013 … (not shown), wherein the first liquid storage bin 1011 is used for storing liquid forming an outer shell structure of a shell-core liquid droplet, the second liquid storage bin 1012 is used for storing liquid forming a first core layer adjacent to a shell layer, the third liquid storage bin 1013 is used for storing liquid forming a second core layer adjacent to the first core layer … the nth liquid storage bin is used for storing liquid of an innermost (n-1) th core layer, and n is an integer greater than or equal to 2.
In addition, a first opening and a second opening may be formed in the wall of the liquid storage tank 101, and pipelines may be provided at the first opening and the second opening to be engaged therewith for guiding in and out the liquid in the liquid storage tank, respectively. In addition, a liquid level detector can be arranged in the liquid storage bin to monitor the liquid level condition in the liquid storage bin, and a temperature controller is arranged to control the temperature of the liquid in the liquid storage bin.
The nozzle 102 comprises a plurality of coaxial liquid conveying pipes, and each liquid conveying pipe is communicated with the corresponding liquid storage bin 101. Fig. 2 a is a schematic view and a bottom view of a showerhead including two infusion tubes, and fig. 2 b is a schematic view and a bottom view of a showerhead including three coaxial infusion tubes. Because a plurality of infusion tubes of the nozzle 102 are coaxial, when liquid flows out of the infusion tubes, a plurality of layers of coated core-shell liquid drops can be formed, and the thickness of each layer can be adjusted by only controlling the flowing speed of the liquid in the infusion tubes, so that the device is convenient and quick. As shown in fig. 3, in an embodiment, the nozzle 102 includes three coaxial infusion tubes, which are a first infusion tube 1021, a second infusion tube 1022 and a third infusion tube 1023, wherein the first infusion tube 1021 is used for transporting the liquid to be prepared for forming the shell layer, the second infusion tube 1022 is used for transporting the liquid to be prepared for forming the first core layer, and the third infusion tube 1033 is used for transporting the liquid to be prepared for forming the second core layer.
In order to ensure that the formed shell-core spherical liquid drop has a better multilayer coating structure, the output pipe of the inner layer liquid conveying pipe positioned in the inner part is preferably protruded out of the output pipe of the outer layer liquid conveying pipe positioned in the outer part in any two adjacent liquid conveying pipes. More preferably, the distance h between the output ends of any two adjacent transfusion tubes in the direction of the central axis of the transfusion tubes in the plurality of coaxial transfusion tubes is less than or equal to r2-r1Wherein r is2The radius r of the outer layer infusion tube positioned outside two adjacent infusion tubes1The radius of the inner-layer infusion tube positioned close to the inner part in two adjacent infusion tubes is favorable for forming the core-shell spherical liquid drop with a concentric structure with better sphericity.
The spray heads 102 can be detachably connected, so that on one hand, infusion tubes with different diameters can be conveniently replaced according to requirements, and on the other hand, the cleaning is convenient, so that the infusion tubes are blocked and the instrument needs to be integrally detached.
In addition, the material for preparing the infusion tube is not particularly limited, and can be made of stainless steel or rubber resin material, and a coating layer with polarity opposite to that of the liquid to be prepared is preferably formed in the infusion tube so as to avoid trailing caused by adhesion of the liquid. In one embodiment, the inner wall of the infusion tube has a hydrophobic surface.
The driving member 103 is a device for controlling the flow rate of the liquid in each liquid transport tube, and the number and the position thereof are not particularly limited, and may be provided in the tank 101 or may be provided in the vicinity of the head 102. The drive unit 103 may be an electric drive unit having a control panel for presetting the flow rate of the liquid in each infusion tube.
In addition, the core-shell spherical droplet preparation apparatus may further include a curing tank 104, where the curing tank 104 is disposed opposite to the spray head 102 and is used to form a cured film on the surface of the droplet sprayed from the spray head 102. The components in the curing bath may be set according to the selected curing method. The curing method can be curing liquid curing, photo-curing, temperature control curing and the like. In one embodiment, the curing bath contains a curing liquid. In another embodiment, the level of the curing liquid satisfies the following formula: h is less than or equal to 1.5d, wherein d represents the diameter of the liquid drop sprayed out of the spray head, and h represents the vertical distance between the end part of the output pipe of the infusion pipe at the innermost layer of the spray head and the liquid level of the solidified liquid. The type of the solidifying liquid is not particularly limited, and it may be a calcium ion solution such as calcium chloride or calcium lactate, or a polymer such as agarose, gelatin, chitosan, or the like. In one embodiment, the solidifying liquid is a calcium ion solution with a mass percentage of 0.5% -2%. Only a small amount of alginate is needed to be added into the liquid to be prepared, and the liquid drops can be rapidly solidified after entering the solidification liquid, so that the liquid drops can be effectively prevented from deforming due to the action of the resistance of the solution. In addition, other materials or auxiliary materials to be wrapped can be added into the curing liquid to meet the requirements of various products, and are not particularly limited.
In addition, the core-shell spherical droplet preparation apparatus 10 may further include a photo-coupler detector 105 for detecting properties of the droplets ejected from the ejection head 102, for example: the particle size of the droplets, the sphericity of the droplets, etc. The photo-coupler detector may be disposed in a region between the shower head and the curing bath, and is not particularly limited thereto.
The core-shell spherical droplet preparation device 10 is provided with a nozzle 102 with a plurality of coaxial infusion tubes, and the infusion tubes are communicated with the corresponding liquid storage bin 101, so that the multi-layer coated core-shell droplet can be formed under the action of each infusion tube. And the core-shell spherical liquid drop preparation device is also provided with a driving part 103 to control the flow speed of liquid in each liquid conveying pipe, so that the thickness of each layer of the formed core-shell liquid drops can be controlled, and the structure and the taste of a product can be adjusted.
In addition, the core-shell spherical liquid drop preparation device can form spherical products without a spherical die for film pouring, the preparation process is simple, higher technical requirements are not needed, the production cost is lower, and the application value is higher.
The method for preparing the core-shell spherical liquid drop by adopting the preparation device of the core-shell spherical liquid drop comprises the following steps:
s101: each liquid to be prepared is prepared.
Each liquid to be prepared may be a fruit juice, a drug solution, a liquid-like skin care product, or the like, and is not particularly limited herein. In order to avoid mutual fusion between layers in the preparation of the multilayer core-shell structure droplet, the liquid to be prepared is preferably a liquid with higher viscosity, in one embodiment, the absolute viscosity of the liquid to be prepared is greater than or equal to 128cP, and in another embodiment, the absolute viscosity of the liquid to be prepared is greater than or equal to 2000 cP. In addition, the mass percentages of the solutes in the liquids to be prepared in the layers are preferably close, and in one embodiment, the mass percentage difference between the solutes in the liquids to be prepared in the two adjacent layers is 0-5% to reduce the diffusion of the solutes. In addition, the liquid to be prepared of two adjacent layers can adopt solvents with opposite polarities to form an oil-in-water or water-in-oil coating structure, and is not particularly limited herein.
In addition, auxiliary materials such as a surfactant and the like can be added into the liquid to be prepared to adjust the surface tension of the liquid drops. And the type and the addition amount of the liquid to be prepared or the auxiliary materials thereof can be adjusted according to the adopted curing method, in one embodiment, the liquid to be prepared in the outermost layer of the transfusion tube is a sodium alginate solution with the mass percentage of 0.5-2%, and the curing liquid is a calcium ion solution with the mass percentage of 0.5-2%. Thus, a cured film can be rapidly formed on the outer layer to wrap the inner multi-layer liquid core layer.
S102: and adding each prepared liquid to be prepared into a corresponding liquid storage bin.
It should be noted that, the liquid may be directly added to the corresponding liquid storage bin according to the position relationship of each layer in the shell-core spherical liquid droplet to be formed, or the liquid may be added to the liquid storage bin first, and then the position of the liquid storage bin may be adjusted according to the position of each layer of the shell-core spherical liquid droplet to be formed, which is not particularly limited herein.
S103: and adjusting the driving part to control the flow speed of each liquid to be prepared in the infusion tube.
Because the liquid flow rates in the liquid conveying pipes are different, the thickness and the shape of each layer of the formed core-shell liquid drop are different, preferably, the flow rate of the liquid to be prepared in any two adjacent liquid conveying pipes meets the following formula: v. of1/v2＝(R3-r3)/r3Wherein v is1Indicating the flow rate, v, of the liquid to be prepared in the outer infusion tube2The flow rate of the liquid to be prepared in the inner-layer infusion tube is shown, R is the radius of the outer-layer infusion tube positioned at the outer side, and R is the radius of the inner-layer infusion tube positioned at the inner side, so that the core-shell spherical liquid drop with a better and uniform shape can be prepared. In one embodiment, the radius of the infusion tube at the outermost layer is 5mm-8 mm. The liquid drops of the outermost layer of the transfusion tube in the range have better sphericity. In one embodiment, the outermost layer of the infusion tube has a radius of 6 mm.
The preparation method of the core-shell spherical liquid drop can realize the preparation of the product coated with the multiple liquid core layers only by adjusting the liquid to be prepared in each liquid storage bin according to the needs, can effectively avoid the problem that each taste raw material needs to be mixed when preparing the product with mixed taste, and can realize the thickness adjustment of each layer in the formed core-shell spherical liquid drop only by adjusting the flow speed of each layer, thereby realizing the taste adjustment, being convenient and fast, and having higher application value.
In addition, the method can realize the hardness degree of the prepared core-shell spherical liquid drop product only by adjusting the curing method or the concentration of the curing liquid, and is particularly suitable for the technical fields of food processing and pharmaceutical preparations.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method for preparing a core-shell spherical liquid drop coated with a plurality of cores by a core-shell spherical liquid drop preparation device is characterized in that the core-shell spherical liquid drop preparation device comprises a plurality of liquid storage bins, a spray head and a driving component; wherein, the plurality of liquid storage bins are used for storing each liquid to be prepared; the spray head comprises a plurality of coaxial liquid conveying pipes, and each liquid conveying pipe is communicated with the corresponding liquid storage bin and is used for forming multilayer coated spherical liquid drops; the driving part is used for controlling the flow speed of the liquid to be prepared in each infusion tube;
wherein, among the plurality of coaxial infusion tubes, the distance h between the output ends of any two adjacent infusion tubes is not more than r along the direction of the central axis of the infusion tubes2-r1Wherein r is2The radius r of the outer layer transfusion tube positioned outside the two adjacent transfusion tubes1The radius of an inner layer infusion tube positioned in the inner part of two adjacent infusion tubes is the radius of the inner layer infusion tube;
the radius of the transfusion tube at the outermost layer is 5mm-8 mm;
in any two adjacent infusion tubes, the output tube of the inner infusion tube positioned at the inner side protrudes out of the output tube of the outer infusion tube positioned at the outer side;
the method for preparing the core-shell spherical liquid drop coated with the multilayer core comprises the following steps:
preparing each liquid to be prepared;
adding the prepared liquid to be prepared into the corresponding liquid storage bin;
adjusting the driving part and controlling the flow speed of each liquid to be prepared in the infusion tube;
wherein the absolute viscosity of the liquid to be prepared is greater than or equal to 128cP, and the mass percentage content difference of the solutes of the liquid to be prepared of two adjacent layers is 0-5%; or the liquid to be prepared of two adjacent layers adopts solvents with opposite polarities;
the flow rate of the liquid to be prepared in any two adjacent transfusion tubes meets the following formula: v. of1/v2＝(R3-r3)/r3Wherein v is1Indicating the flow rate, v, of the liquid to be prepared in the outer infusion tube2The flow rate of the liquid to be prepared in the inner-layer infusion tube is shown, R is the radius of the outer-layer infusion tube positioned at the outer side, and R is the radius of the inner-layer infusion tube positioned at the inner side.
2. The method according to claim 1, wherein the core-shell spherical droplet preparation apparatus further comprises a photo-coupler detector for detecting a particle size of the droplet ejected from the ejection head.
3. The method of claim 1, further comprising a curing bath disposed opposite the spray head for forming a cured film on the surface of the droplets.
4. The method of claim 3, further comprising the step of adding a curing fluid to the curing bath, wherein the curing fluid is added to meet the following requirements:
h is less than or equal to 1.5d, wherein d represents the diameter of the liquid drop sprayed out of the spray head, and h represents the vertical distance between the end part of the output pipe of the infusion pipe at the innermost layer of the spray head and the liquid level of the solidified liquid.
5. The method according to claim 4, characterized in that the solidifying liquid is a calcium ion solution with the mass percentage of 0.5-2%;
the liquid to be prepared in the outermost layer of the transfusion tube contains 0.5-2% of sodium alginate solution by mass percent.
6. A method according to any of claims 1-5, characterized in that the absolute viscosity of the liquid to be prepared is greater than or equal to 2000 cP.
7. A core-shell spherical liquid drop preparation device for preparing core-shell spherical liquid drops coated with multiple layers of cores is characterized by comprising a plurality of liquid storage bins, spray heads and driving components; wherein, the plurality of liquid storage bins are used for storing each liquid to be prepared; the spray head comprises a plurality of coaxial liquid conveying pipes, and each liquid conveying pipe is communicated with the corresponding liquid storage bin and is used for forming multilayer coated spherical liquid drops; the driving part is used for controlling the flow speed of the liquid to be prepared in each infusion tube;
wherein, among the plurality of coaxial infusion tubes, the distance h between the output ends of any two adjacent infusion tubes is not more than r along the direction of the central axis of the infusion tubes2-r1Wherein r is2The radius r of the outer layer transfusion tube positioned outside the two adjacent transfusion tubes1The radius of an inner layer infusion tube positioned in the inner part of two adjacent infusion tubes is the radius of the inner layer infusion tube;
the radius of the transfusion tube at the outermost layer is 5mm-8 mm;
in any two adjacent infusion tubes, the output tube of the inner infusion tube positioned at the inner side protrudes out of the output tube of the outer infusion tube positioned at the outer side.
8. The apparatus of claim 7, wherein the nozzles are detachably connected.
9. The core-shell spherical droplet preparation apparatus according to claim 7, further comprising a curing tank, wherein the curing tank is disposed opposite to the spray head, and is configured to form a cured film on the surface of the droplet.
10. The core-shell spherical droplet preparation apparatus according to claim 7, further comprising a photo coupler detector for detecting a particle diameter of the droplet ejected from the ejection head.
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| CN102070895A (en) * | 2010-11-17 | 2011-05-25 | 无锡中科光远生物材料有限公司 | Core-shell microcapsule and preparation method thereof |
| CN102711977A (en) * | 2009-10-30 | 2012-10-03 | 赢创罗姆有限公司 | Encapsulation of reactive components of a one-component system using coaxial nozzles |
| CN103635252A (en) * | 2011-03-08 | 2014-03-12 | 卡普苏姆公司 | Method for forming drops of a first phase dispersed in a second phase substantially immiscible with the first phase |
| CN104474552A (en) * | 2014-11-24 | 2015-04-01 | 浙江大学 | Method for preparing multifunctional multilayer micro/nanometer core-shell structure |
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2019
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102711977A (en) * | 2009-10-30 | 2012-10-03 | 赢创罗姆有限公司 | Encapsulation of reactive components of a one-component system using coaxial nozzles |
| CN102070895A (en) * | 2010-11-17 | 2011-05-25 | 无锡中科光远生物材料有限公司 | Core-shell microcapsule and preparation method thereof |
| CN103635252A (en) * | 2011-03-08 | 2014-03-12 | 卡普苏姆公司 | Method for forming drops of a first phase dispersed in a second phase substantially immiscible with the first phase |
| CN104474552A (en) * | 2014-11-24 | 2015-04-01 | 浙江大学 | Method for preparing multifunctional multilayer micro/nanometer core-shell structure |
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