CN114223938A - Preparation method of tobacco tar microcapsule - Google Patents
Preparation method of tobacco tar microcapsule Download PDFInfo
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- CN114223938A CN114223938A CN202210046429.9A CN202210046429A CN114223938A CN 114223938 A CN114223938 A CN 114223938A CN 202210046429 A CN202210046429 A CN 202210046429A CN 114223938 A CN114223938 A CN 114223938A
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- phase fluid
- tobacco tar
- microcapsule
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
- A24D3/02—Manufacture of tobacco smoke filters
- A24D3/0204—Preliminary operations before the filter rod forming process, e.g. crimping, blooming
- A24D3/0212—Applying additives to filter materials
- A24D3/0216—Applying additives to filter materials the additive being in the form of capsules, beads or the like
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
- A24D3/06—Use of materials for tobacco smoke filters
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing Of Micro-Capsules (AREA)
Abstract
The invention discloses a preparation method of tobacco tar microcapsules, and a preparation device of the tobacco tar microcapsules comprises the following steps: the injection device comprises an inner needle head, a first injection pump, an outer needle head, a second injection pump, a driving phase cavity and a third injection pump, wherein the outer needle head is coaxially sleeved outside the inner needle head, an annular gap is formed between the inner needle head and the outer needle head; the preparation method comprises the following steps: the third injection pump drives the driving phase fluid to be injected into the driving phase cavity and the driving phase fluid flows out from the liquid outlet hole after being filled in the driving phase cavity; the second injection pump drives the external phase fluid to be injected into the annular gap, and the external phase fluid flows out from the liquid outlet end of the outer needle head; the first injection pump drives the inner phase fluid to be injected into the inner needle head and flow out from the liquid outlet end of the inner needle head, so that the inner phase fluid is wrapped by the outer phase fluid and is stretched and sheared under the action of the driving phase fluid to form double emulsion micro-droplets which flow out along with the driving phase fluid. The capsule preparation method is high in efficiency and good in quality.
Description
Technical Field
The invention relates to the technical field of tobacco tar microcapsules, in particular to a preparation method of a tobacco tar microcapsule.
Background
At present, global smokers are more than one billion and account for about one fourth of the world population, and the market of China, which is the country with the largest golden ball smokers, is huge, and meanwhile, the competition is increasingly violent. With the continuous deepening of harm reduction and tar reduction, the partial loss of the aroma quality and the aroma quantity of the cigarettes is inevitably caused, and the smoking taste is influenced. Therefore, the method for improving the taste of the cigarette by directly adding the essence is an effective method for improving the taste of the cigarette. The existing essence adding method mainly comprises the steps of adding essence into tobacco shreds or adding an essence thread adhered with essence into a filter tip, and the two methods have the defects of short essence retention time, uneven essence release and the like. In order to solve the problems caused by directly adding essence, the micro-capsule for tobacco, namely the essence, is an important innovation direction for the tobacco industry at home and abroad. Essence is wrapped in a wall material with extremely high stability, and the diameter of the prepared blasting bead is controlled to be several millimeters to hundreds of micrometers. The microcapsule for cigarette can be added into cigarette tube to improve cigarette quality by slow release of microcapsule for cigarette or added into cigarette filter to release perfume by breaking bead blasting by suction.
For example, patent application No. CN201810533533.4 discloses a preparation method of the water-containing blasting bead for the cigarette. A plurality of semicircular plastic grooves are formed in a plastic film in a thermoplastic mode, crystal ice balls are placed in the plastic grooves and then covered by the plastic film, the two layers of films are fused together to form plastic sheets containing exploded beads, the plastic sheets are cut, the parts of the exploded beads are reserved and transferred into an oven, the inner parts of the plastic sheets are melted, and the plastic sheets containing water are formed. The water-coated plastic sheet prepared by the technical scheme has the advantages of complex cutting, large and uneven slices, poor rounding and narrow material application range, and is not suitable for preparation of most essence tobacco tar microcapsules. For example, patent application No. CN201910909300.4 discloses a method for preparing coffee flavor type blasting beads for cigarettes, which comprises dissolving coffee essence in an oily solvent, mixing with sodium alginate solution and calcium chloride solution to obtain microspheres containing coffee essence, placing the microspheres in a crosslinking solution (chitosan or potassium persulfate solution, which is helpful for forming a film on the surface of the microspheres), crosslinking for 20-40min, dehydrating, and drying to obtain the coffee flavor type blasting beads for cigarettes. The microcapsule for coffee aroma type cigarette is prepared by adopting an ionic crosslinking method, and the production efficiency is high, and the product quality stability is good. But the preparation conditions are complex, the control parameters are more, the particle size cannot be accurately controlled, the monodispersity of the product is poor, agglomeration and other phenomena are easy to occur, and the wrapping rate is low.
Disclosure of Invention
The invention mainly aims to provide a preparation method of tobacco tar microcapsules, aiming at ensuring high capsule preparation efficiency and good capsule quality.
In order to achieve the above object, the present invention provides a method for preparing tobacco tar microcapsules, wherein the apparatus for preparing tobacco tar microcapsules comprises: interior syringe needle, through the pipeline with first syringe pump, the coaxial cover that the feed liquor end of interior syringe needle is connected are located the outer syringe needle in the interior syringe needle outside, through the pipeline with second syringe pump, the bottom that the feed liquor end of outer syringe needle is connected set up out the drive phase cavity in liquid hole and through the pipeline with the third syringe pump that the drive phase cavity is connected, outer syringe needle with form annular gap between the interior syringe needle, the play liquid end of interior syringe needle with the play liquid end of outer syringe needle alternates into in the drive phase cavity, and with go out the relative setting in liquid hole, the preparation method of tobacco tar microcapsule includes following step:
the third injection pump drives the driving phase fluid to be injected into the driving phase cavity, and the driving phase fluid is made to flow out from the liquid outlet after filling the driving phase cavity;
the second injection pump drives the external phase fluid to be injected into an annular gap formed between the outer needle head and the inner needle head, and the external phase fluid is made to flow out from the liquid outlet end of the outer needle head;
the first injection pump drives the inner phase fluid to be injected into the inner needle and flow out from the liquid outlet end of the inner needle, so that the inner phase fluid is wrapped by the outer phase fluid and is stretched and sheared under the action of the driving phase fluid, and double emulsion micro-droplets are formed and flow out along with the driving phase fluid.
Optionally, the apparatus for preparing tobacco tar microcapsule further comprises a receiving vessel, and the method for preparing tobacco tar microcapsule further comprises, after the step of flowing the double emulsion micro-droplets out of the liquid outlet with the driving phase fluid, the steps of: and the receiving vessel receives and collects the driving phase fluid and the double-emulsion micro-droplets which flow out from the liquid outlet hole.
Optionally, the apparatus for preparing tobacco tar microcapsule further comprises a shaking table, and the method for preparing tobacco tar microcapsule further comprises, after the step of collecting the driving phase fluid and the double-emulsion micro-droplets flowing out from the liquid outlet, the steps of: and the shaking table vibrates the double-emulsion micro-droplets in the receiving vessel.
Optionally, the apparatus for preparing tobacco tar microcapsule further comprises an ultraviolet lamp, and the method for preparing tobacco tar microcapsule further comprises, after the step of oscillating the double emulsion micro droplets in the receiving vessel, the steps of: and irradiating the double-emulsion micro-droplets by using an ultraviolet lamp to solidify the double-emulsion micro-droplets to form the tobacco tar microcapsule.
Optionally, the preparation method of the tobacco tar microcapsule further comprises, after the step of irradiating the double-emulsion micro-droplets to solidify the double-emulsion micro-droplets to form the microcapsule, the steps of: washing the tobacco tar microcapsules.
Optionally, the method for preparing the tobacco tar microcapsule is characterized in that after the step of washing the tobacco tar microcapsule, the method further comprises the steps of: and naturally drying the tobacco tar microcapsule at room temperature.
Optionally, the flow rate of the fluid in the inner phase injected by the first injection pump is 10-30 ml/h; the flow rate of the external phase fluid injected by the second injection pump is 10-30 ml/h; the flow rate of the driving phase fluid injected by the third injection pump is 400-500 ml/h.
Optionally, the inner phase fluid is tobacco tar, the outer phase fluid is a mixture of trimethylolpropane ethoxylate triacrylate, ethanol, and a photoinitiator, and the driver phase fluid is an aqueous solution of polyvinyl alcohol.
Optionally, the external phase fluid comprises trimethylolpropane ethoxytriacrylate and ethanol in equal volumes, and a photoinitiator in 1% of total volume.
Optionally, the mass concentration of the polyvinyl alcohol in the driving phase fluid is 1-3%.
In the invention, the inner phase fluid flowing out of the inner needle head is wrapped by the outer phase fluid flowing out of the outer needle head, and is stretched and sheared under the flowing action of the driving phase fluid, so that double emulsion micro-droplets wrapping the inner phase fluid by the outer phase fluid are formed. In the process of forming the double-emulsion micro-droplets, because the disturbance is continuously increased and the fluid interface is finally cut off, the surface tension and other acting forces are almost in the same order of magnitude in the process, so that the micro-droplets with good monodispersity can be obtained; meanwhile, the driving phase fluid provides a shearing acting force, so that the two interfaces are coaxially stretched, the outer phase fluid wraps the inner phase fluid and moves in the same direction to form coaxial jet flow, and double-emulsion micro-droplets with high wrapping rate are obtained. The particle size of the microcapsule is flexibly adjusted by controlling the flow rates of the inner phase fluid, the outer phase fluid and the driving phase fluid, and the particle size of the microcapsule is uniform under the action of the driving phase fluid, so that the precise control of the particle size of the microcapsule is effectively improved, the integral encapsulation rate of the microcapsule is improved, the generation frequency of double-emulsion micro-droplets is high, the particle size is uniform and controllable, the balling performance is good, the quality is stable, and the preparation efficiency and the quality of the tobacco tar microcapsule are high.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of an apparatus for preparing tobacco tar microcapsules provided by the present invention;
FIG. 2 is a schematic structural view of a first embodiment of a portion of the apparatus for making the tobacco smoke microcapsules of FIG. 1;
FIG. 3 is a schematic structural view of a second embodiment of a portion of the apparatus for making the tobacco smoke microcapsules of FIG. 1;
fig. 4 is a schematic flow chart of an embodiment of a preparation method of the tobacco tar microcapsule provided by the invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 1 | |
101 | |
| 2 | |
201 | |
| 3 | |
301 | |
| 4 | |
302 | |
| 5 | Shaking table | 303 | |
| 6 | Purple light lamp |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
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.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
In order to improve the taste of the cigarette, essence is wrapped in a wall material with extremely high stability to prepare the popping beads with the diameter controlled from several millimeters to hundreds of micrometers. The microcapsule for cigarette can be added into cigarette tube to improve cigarette quality by slow release of microcapsule for cigarette or added into cigarette filter to release perfume by breaking bead blasting by suction. The existing tobacco tar microcapsule preparation method has the problems of poor adaptability, incapability of accurately controlling the particle size of the microcapsule, poor monodispersity of products and low wrapping rate.
In view of this, the invention mainly provides a preparation method of tobacco tar microcapsules, aiming at high capsule preparation efficiency and good capsule quality.
Referring to fig. 1 to 3, the present invention provides a device for preparing tobacco tar microcapsules, which comprises: interior syringe needle 1, through the pipeline with first syringe pump 101, the coaxial cover that the feed liquor end of interior syringe needle 1 is connected are located the outer syringe needle 2 in the interior syringe needle 1 outside, through the pipeline with second syringe pump 201, the bottom that the feed liquor end of outer syringe needle 2 is connected set up out liquid hole 302 drive looks cavity 3 and through the pipeline with the third syringe pump 301 that drive looks cavity 3 is connected, outer syringe needle 2 with form annular gap between the interior syringe needle 1, the play liquid end of interior syringe needle 1 with the play liquid end of outer syringe needle 2 alternates into in the drive looks cavity 3, and with it sets up relatively to go out liquid hole 302.
In this embodiment, the preparation method of the tobacco tar microcapsule comprises the following steps:
s10: the third injection pump 301 drives the driving phase fluid to be injected into the driving phase chamber 3, and the driving phase fluid is made to flow out from the liquid outlet 302 after filling the driving phase chamber 3;
s20: the second injection pump 201 drives the external phase fluid to be injected into the annular gap formed between the outer needle 2 and the inner needle 1, and the external phase fluid is made to flow out from the liquid outlet end of the outer needle 2;
s30: the first injection pump 101 drives the inner phase fluid to be injected into the inner needle 1 and flow out from the liquid outlet end of the inner needle 1, so that the inner phase fluid is wrapped by the outer phase fluid and is stretched and sheared under the action of the driving phase fluid, and double emulsion micro-droplets are formed and flow out along with the driving phase fluid.
In the embodiment, the inner phase fluid flowing out of the inner needle 1 is wrapped by the outer phase fluid flowing out of the outer needle 2, and is subjected to stretching and shearing under the flow action of the driving phase fluid, so that double emulsion micro-droplets wrapping the inner phase fluid by the outer phase fluid are formed. In the process of forming the double-emulsion micro-droplets, because the disturbance is continuously increased and the fluid interface is finally cut off, the surface tension and other acting forces are almost in the same order of magnitude in the process, so that the micro-droplets with good monodispersity can be obtained; meanwhile, the driving phase fluid provides a shearing acting force, so that the two interfaces are coaxially stretched, the outer phase fluid wraps the inner phase fluid and moves in the same direction to form coaxial jet flow, and double-emulsion micro-droplets with high wrapping rate are obtained. The particle size of the microcapsule is flexibly adjusted by controlling the flow rates of the inner phase fluid, the outer phase fluid and the driving phase fluid, and the particle size of the microcapsule is uniform under the action of the driving phase fluid, so that the precise control of the particle size of the microcapsule is effectively improved, the integral encapsulation rate of the microcapsule is improved, the generation frequency of double-emulsion micro-droplets is high, the particle size is uniform and controllable, the balling performance is good, the quality is stable, and the preparation efficiency and the quality of the tobacco tar microcapsule are high.
In some embodiments, the outlet end of the inner needle 1 extends out of the outlet end of the outer needle 2 by 0.15mm to 0.25mm, for example, 0.2mm, so that the inner phase fluid can be in the outer phase fluid more stably, and the outer phase fluid wraps the inner phase fluid.
In order to make the driven phase fluid have a certain flow rate at the outlet end of the inner needle 1, so as to generate sufficient shearing action on the inner phase fluid and the outer phase fluid, in some embodiments, the distance between the outlet end of the inner needle 1 and the outlet hole 302 is 0.8mm to 1.2mm, such as 1 mm.
Furthermore, the liquid outlet end of the outer needle 2 is of a necking structure, so that the outer phase fluid generates cone jet flow when flowing out from the necking end, and the wrapping rate of the tobacco tar microcapsule is improved.
In some embodiments, the diameter of the exit opening 302 is 350 μm to 550 μm, such as 400 μm, 450 μm, or 500 μm, so that a flow focus is formed there to facilitate sufficient shearing of the inner and outer phase fluids.
Furthermore, the inner wall of the liquid outlet hole 302 is a smooth surface, so that the fluid can be kept stable when flowing, the generation of turbulence is reduced, the controllability of the preparation process is increased, and the preparation effect is ensured.
In order to facilitate the collection of the driving phase fluid and the double emulsion micro droplets, in this embodiment, the apparatus for preparing tobacco tar microcapsule further includes a receiving vessel 4, and the method for preparing tobacco tar microcapsule further includes, after step S30, the steps of:
s40: and carrying out carrying collection on the driving phase fluid and the double-emulsion micro-droplets flowing out of the liquid outlet hole 302 by using the carrying vessel 4. It should be noted that, as shown in fig. 3, in some embodiments, the tobacco tar microcapsule preparation apparatus includes a flow guide tube 303, the flow guide tube 303 is convexly disposed at the bottom of the driving phase chamber 3, and has a liquid outlet end far away from the bottom of the driving phase chamber 3 and a liquid inlet end communicated with the liquid outlet hole 302, at this time, the receiving vessel 4 is correspondingly disposed at the liquid outlet end of the flow guide tube 303 to receive and collect the driving phase fluid and the double emulsion droplets.
Further, the apparatus for preparing tobacco tar microcapsule further comprises a shaking table 5, and the method for preparing tobacco tar microcapsule further comprises, after step S40, the steps of:
s50: the shaking table 5 vibrates the double-emulsion micro-droplets in the receiving vessel 4, so that the double-emulsion micro-droplets are preliminarily formed. The rotating speed and the time of the shaking table 5 are set according to requirements, specifically, the rotating speed of the shaking table 5 is set to be 20-80 r/min, and the oscillation time is 1 min.
Further, the apparatus for preparing tobacco tar microcapsule further comprises an ultraviolet lamp 6, and the method for preparing tobacco tar microcapsule further comprises, after step S50, the steps of:
s60: and irradiating the double-emulsion micro-droplets by using an ultraviolet lamp 6 to solidify the double-emulsion micro-droplets to form the tobacco tar microcapsule. The curing time is related to the shell thickness of the microcapsules, and specifically, for example, the curing time is 6 seconds when the wall thickness of the microcapsules is 30 μm, and the curing time is 12 seconds when the wall thickness is 50 μm.
Further, after the step S60, the method for preparing tobacco tar microcapsules further comprises the steps of:
s70: washing the tobacco tar microcapsule to remove impurities adhered to the surface of the capsule shell in the preparation process, wherein the washing frequency is three times or more to ensure thorough washing.
Further, after the step S70, the method for preparing tobacco tar microcapsules further comprises the steps of:
s80: and naturally drying the tobacco tar microcapsule at room temperature to obtain the dried tobacco tar microcapsule, so that the storage and transportation at the later stage are convenient.
The preparation of the microcapsule products for cigarettes with different particle sizes can be realized by adjusting the flow rates of the internal phase fluid, the external phase fluid and the driving phase fluid, and the particle size range can be adjusted from hundreds of micrometers to millimeters. In some embodiments, the first syringe pump 101 injects the internal phase fluid at a flow rate of 10 to 30ml/h, such as at a flow rate of 15ml/h, 20ml/h, or 25 ml/h; the flow rate of the external phase fluid injected by the second injection pump 201 is 10-30 ml/h, for example, the flow rate is 20ml/h or 25 ml/h; the flow rate of the driving phase fluid injected by the third injection pump 301 is 400-500 ml/h, such as 420ml/h, 450ml/h or 460 ml/h.
In some embodiments, the inner phase fluid is a tobacco tar, such as, for example, tobacco tar 6672, the outer phase fluid is a mixture of trimethylolpropane ethoxylate triacrylate, ethanol, and a photoinitiator, and the driver phase fluid is an aqueous solution of polyvinyl alcohol.
The photoinitiator is also called photosensitizer or photocuring agent, and is a compound which can absorb energy with a certain wavelength in an ultraviolet light region or a visible light region to generate free radicals, cations and the like so as to initiate polymerization, crosslinking and curing of monomers, and the volume ratio of the photoinitiator in the mixture is set according to requirements. In some embodiments, the external phase fluid comprises the same volume of trimethylolpropane ethoxy triacrylate and ethanol, and 1% by volume of a photoinitiator.
Further, in some embodiments, the mass concentration of the polyvinyl alcohol in the driving phase fluid is 1-3%.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A preparation method of tobacco tar microcapsules is characterized in that a preparation device of the tobacco tar microcapsules comprises the following steps: interior syringe needle, through the pipeline with first syringe pump, the coaxial cover that the feed liquor end of interior syringe needle is connected are located the outer syringe needle in the interior syringe needle outside, through the pipeline with second syringe pump, the bottom that the feed liquor end of outer syringe needle is connected set up out the drive phase cavity in liquid hole and through the pipeline with the third syringe pump that the drive phase cavity is connected, outer syringe needle with form annular gap between the interior syringe needle, the play liquid end of interior syringe needle with the play liquid end of outer syringe needle alternates into in the drive phase cavity, and with go out the relative setting in liquid hole, the preparation method of tobacco tar microcapsule includes following step:
the third injection pump drives the driving phase fluid to be injected into the driving phase cavity, and the driving phase fluid is made to flow out from the liquid outlet after filling the driving phase cavity;
the second injection pump drives the external phase fluid to be injected into an annular gap formed between the outer needle head and the inner needle head, and the external phase fluid is made to flow out from the liquid outlet end of the outer needle head;
the first injection pump drives the inner phase fluid to be injected into the inner needle and flow out from the liquid outlet end of the inner needle, so that the inner phase fluid is wrapped by the outer phase fluid and is stretched and sheared under the action of the driving phase fluid, and double emulsion micro-droplets are formed and flow out along with the driving phase fluid.
2. The method of claim 1, wherein the apparatus further comprises a receiving vessel, and wherein the method further comprises, after the step of flowing the double emulsion droplets out of the exit orifice with the drive phase fluid, the steps of:
and the receiving vessel receives and collects the driving phase fluid and the double-emulsion micro-droplets which flow out from the liquid outlet hole.
3. The method of claim 2, wherein the apparatus further comprises a shaker, and the method further comprises, after the step of collecting the mobile phase fluid and the double emulsion droplets flowing out of the exit orifice, the steps of:
and the shaking table vibrates the double-emulsion micro-droplets in the receiving vessel.
4. The method of claim 3, wherein the apparatus further comprises a UV lamp, and the method further comprises the step of, after the step of shaking the double emulsion droplets in the receiving vessel:
and irradiating the double-emulsion micro-droplets by using an ultraviolet lamp to solidify the double-emulsion micro-droplets to form the tobacco tar microcapsule.
5. The method of claim 4, wherein the method of producing tobacco microcapsules further comprises, after the step of irradiating the double emulsion microdroplets to solidify the double emulsion microdroplets to form microcapsules, the steps of: washing the tobacco tar microcapsules.
6. The method of claim 5, wherein the method of preparing the tobacco tar microcapsule further comprises, after the step of washing the tobacco tar microcapsule, the steps of: and naturally drying the tobacco tar microcapsule at room temperature.
7. The method for preparing the tobacco tar microcapsule according to any one of claims 1 to 6, wherein the flow rate of the fluid of the inner phase injected by the first injection pump is 10 to 30 ml/h; the flow rate of the external phase fluid injected by the second injection pump is 10-30 ml/h; the flow rate of the driving phase fluid injected by the third injection pump is 400-500 ml/h.
8. The method of any of claims 1 to 6, wherein the internal phase fluid is tobacco tar, the external phase fluid is a mixture of trimethylolpropane ethoxylate triacrylate, ethanol, and a photoinitiator, and the driver phase fluid is an aqueous solution of polyvinyl alcohol.
9. The method of claim 8, wherein the external phase fluid comprises trimethylolpropane ethoxylate triacrylate and ethanol in equal volumes and 1% photoinitiator based on total volume.
10. The method for preparing tobacco tar microcapsule according to claim 8, wherein the mass concentration of polyvinyl alcohol in the driving phase fluid is 1-3%.
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