A method for cleaning porous ceramics

Abstract

The present application relates to a method for cleaning porous ceramics, the method comprising: using an ionic solution to clean the porous ceramics for the first time; and using a surfactant to clean the porous ceramics for the second time. The present application uses an ionic solution and a surfactant to clean the porous ceramics in sequence, effectively removing tiny particles on the surface of the porous ceramics, ensuring the atomization effect of the porous ceramics, and solving the problem of flying powder.

Description

Technical Field

[0001] The invention relates to the technical field of ceramics, and in particular to a method for cleaning porous ceramics. Background Art

[0002] The ceramic atomizer core is essentially a porous ceramic material, also known as porous functional ceramics. It is formed and fired at high temperature, and has a large number of interconnected or closed pores. It has the characteristics of traditional ceramics such as high temperature resistance, corrosion resistance and high chemical stability. It also has the characteristics of large specific surface area, low density and adjustable pore size distribution. Therefore, the temperature field of the liquid in the ceramic atomizer core is uniform during the atomization process, and the atomization is sufficient per unit time. The e-liquid that has penetrated into the microporous ceramic can be quickly heated to achieve an atomization effect similar to that of the cotton core, giving the user a good smoking experience. However, this material will produce powder particles due to electrostatic effects or surface cracks, and it is easy to produce flying powder during the atomization process, affecting the smoking experience and human health.

[0003] Therefore, a new porous ceramic cleaning method is needed to solve the problem of flying powder during the atomization process of porous ceramics. Summary of the invention

[0004] Based on this, it is necessary to provide a method for cleaning porous ceramics, using ionic solution and surfactant to clean the porous ceramics in turn, effectively removing tiny particles on the surface of the porous ceramics, ensuring the atomization effect of the porous ceramics, and solving the flying powder problem.

[0005] The present application provides a method for cleaning porous ceramics, the cleaning method comprising:

[0006] The porous ceramic is first cleaned using an ionic solution;

[0007] The porous ceramics are cleaned a second time using a surfactant.

[0008] In some embodiments, the ionic solution includes at least one of a sodium chloride solution, a magnesium chloride solution, and an ammonium chloride solution.

[0009] In some embodiments, the surfactant comprises an amino acid surfactant.

[0010] In some embodiments, the hydrophile-lipophile balance value of the surfactant is 13-15.

[0011] In some embodiments, the first cleaning time is 30 to 40 minutes, and the second cleaning time is 20 to 35 minutes.

[0012] In some embodiments, the porous ceramic has a porosity of 47-57% and a pore diameter of 17-20 μm.

[0013] In some embodiments, the second cleaning comprises a first surfactant cleaning treatment, a rinse treatment, and a second surfactant cleaning treatment performed sequentially;

[0014] The first surfactant cleaning treatment includes soaking treatment and ultrasonic treatment; the second surfactant cleaning treatment includes soaking treatment and ultrasonic treatment.

[0015] In some embodiments, the second cleaning further satisfies at least one of the following conditions:

[0016] (1) The soaking time is 3 to 5 minutes;

[0017] (2) The ultrasonic treatment time is 10 to 20 minutes and the temperature is 40 to 50° C.;

[0018] (3) The duration of the flushing treatment is 3 to 7 minutes;

[0019] (4) The rinsing treatment uses water;

[0020] (5) The flushing process includes at least one forward flushing and at least one reverse flushing.

[0021] In some embodiments, during the first cleaning process, the porous ceramic is sequentially immersed in an ionic solution and subjected to an ultrasonic treatment.

[0022] In some embodiments, the first cleaning further satisfies at least one of the following conditions:

[0023] (1) The soaking time is 5 to 10 minutes;

[0024] (2) The ultrasonic treatment time is 15 to 25 minutes and the temperature is 40 to 50°C.

[0025] In some embodiments, the first cleaning further comprises: washing the porous ceramic with water before soaking it in the ion solution.

[0026] Optionally, the water washing treatment includes: sequentially performing spraying treatment, immersion treatment and ultrasonic treatment on the porous ceramic using water.

[0027] In some embodiments, during the water washing process, the spraying treatment is performed at least once, and the duration of each spraying treatment is 1 to 5 minutes.

[0028] In some embodiments, during the water washing process, the soaking time is 3 to 5 minutes.

[0029] In some embodiments, during the water washing process, the ultrasonic treatment time is 15 to 25 minutes and the temperature is 40 to 50°C.

[0030] In some embodiments, the cleaning method further comprises sterilizing the porous ceramic after the second cleaning, and the sterilizing comprises:

[0031] The porous ceramic is sequentially subjected to immersion treatment and ultrasonic treatment using water, and then sequentially subjected to disinfectant spraying treatment and drying treatment.

[0032] In some embodiments, during the disinfection treatment, the soaking time is 3 to 5 minutes.

[0033] In some embodiments, during the disinfection treatment, the ultrasonic treatment time is 10 to 20 minutes and the temperature is 40 to 50°C.

[0034] In some embodiments, the disinfectant spraying treatment is performed at least three times, and the duration of each disinfectant spraying treatment is 1 to 5 minutes.

[0035] In some embodiments, when performing the disinfection treatment, the disinfectant used includes an ethanol solution.

[0036] In some embodiments, the drying process includes blowing and drying with hot air.

[0037] In some embodiments, the drying process is carried out at a temperature of 90 to 110° C. and for a time of 10 to 90 minutes.

[0038] This application has the following beneficial effects:

[0039] In the present application, an ionic solution is first used for cleaning, which has a surface tension greater than that of pure water and can effectively remove powder particles generated by the electrostatic effect during the ceramic processing process; then a surfactant is used for cleaning, which can further dissolve the tiny particles on the surface of the porous ceramic while effectively removing the ionic solution, thereby achieving sufficient cleaning of the porous ceramic and effectively preventing the problem of flying powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a process flow chart of a method for cleaning porous ceramics provided in an embodiment of the present application. DETAILED DESCRIPTION

[0041] In order to make the above-mentioned purpose, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present application are described in detail below. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present application is not limited by the specific embodiments disclosed below.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which the present application belongs. The terms used herein in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0044] In the conventional technology, the porous ceramics are soaked with acid solution and alkaline solution to dissolve and remove the dust particles in the porous ceramics, but the soaking time is not easy to control, which may easily lead to corrosion of the porous ceramics and affect the use of the porous ceramics. In the present application, ionic solution and surfactant are used to avoid corrosion of the porous ceramics, and the porous ceramics can be fully cleaned, effectively solving the problem of flying dust.

[0045] The present application provides a method for cleaning porous ceramics, such as Figure 1 As shown, the cleaning method comprises:

[0046] The porous ceramic is first cleaned using an ionic solution;

[0047] The porous ceramics are cleaned a second time using a surfactant.

[0048] In the present application, the porous ceramics are cleaned in sequence with an ionic solution and a surfactant. The ionic solution is conductive and has a surface tension greater than that of pure water. It can effectively remove dust particles generated on the porous ceramics due to the electrostatic effect. Compared with alkaline solutions and acidic solutions, it can effectively avoid corrosion problems caused by the difficulty in controlling the cleaning time. In addition, the surfactant can not only effectively remove the ionic solution remaining in the porous ceramics, but also dissolve the tiny particles on the surface of the porous ceramics, thereby achieving sufficient cleaning of the porous ceramics and avoiding the problem of fly ash during use.

[0049] It should be noted that the present application does not make any specific requirements or special limitations on the number of first cleaning and second cleaning. For example, the first cleaning can be performed at least once, and the second cleaning can be performed at least once, which can be reasonably selected according to the situation of the porous ceramic.

[0050] It should be noted that the porous ceramic in the present application refers to a ceramic with a porous structure, for example, the porous ceramic is a ceramic atomization core.

[0051] In some embodiments, the ionic solution includes at least one of a sodium chloride solution, a magnesium chloride solution, and an ammonium chloride solution. Optionally, the mass concentration of the ionic solution is 5-15%, for example, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14% or 15%.

[0052] It should be noted that the ionic solution in the present application refers to a solution containing conductive ions, for example, a soluble salt solution.

[0053] In the present application, ammonium salt solution is used for cleaning to reduce solvent residue. The ammonium salt can volatilize and decompose during the drying process, thereby reducing ion solution residue and improving the cleaning effect.

[0054] In some embodiments, the surfactant includes an amino acid surfactant. Optionally, the surfactant includes at least one of sodium lauroyl sarcosinate, isopropanolamide, potassium cocoyl glycinate, and sodium cocoyl glutamate. Sodium cocoyl glutamate is preferred, which has good biodegradability, environmental protection, low cost, and can also suppress the problem of flying powder caused by electrostatic effect.

[0055] In some embodiments, the hydrophile-lipophile balance of the surfactant is 13-15, for example, 13.0, 13.2, 13.4, 13.6, 13.8, 14.0, 14.2, 14.4, 14.6, 14.8 or 15.0.

[0056] In the present application, since porous ceramics are hydrophilic materials, the hydrophilic-lipophilic balance value of the surfactant is controlled to effectively improve the cleaning effect. If the hydrophilic-lipophilic balance value is relatively high or low, the positive adsorption amount at the solution interface is small, so the effect of reducing the surface tension is weak, and the cleaning effect on porous ceramics is poor.

[0057] In some embodiments, the first cleaning step is performed at least twice.

[0058] In some embodiments, the first cleaning time is 30 to 40 minutes, for example, 30 minutes, 31 minutes, 32 minutes, 33 minutes, 34 minutes, 35 minutes, 36 minutes, 37 minutes, 38 minutes, 39 minutes or 40 minutes; the second cleaning time is 20 to 35 minutes, for example, 20 minutes, 22 minutes, 24 minutes, 26 minutes, 28 minutes, 30 minutes, 32 minutes, 34 minutes or 35 minutes.

[0059] In some embodiments, the second cleaning time is shorter than the first cleaning time.

[0060] In the present application, the second cleaning time is controlled to be shorter than the first cleaning time, which can not only ensure the cleaning effect but also avoid damaging the main body structure. Too long cleaning time will affect the structural properties of the porous ceramic.

[0061] In some embodiments, the porous ceramic has a porosity of 47-57%, such as 47%, 48%, 49%, 50%, 51%, 52%, 53%, 54%, 55%, 56% or 57%. Optionally, the porous ceramic has a pore diameter of 17-20 μm, such as 17.0 μm, 17.5 μm, 18.0 μm, 18.5 μm, 19.0 μm, 19.5 μm or 20.0 μm.

[0062] In some embodiments, the second cleaning comprises a first surfactant cleaning process, a rinse process, and a second surfactant cleaning process performed sequentially;

[0063] The first surfactant cleaning treatment includes soaking treatment and ultrasonic treatment; the second surfactant cleaning treatment includes soaking treatment and ultrasonic treatment.

[0064] In this application, a surfactant is used to soak and ultrasonically treat the porous ceramics after cleaning with an ionic solution. The wettability of the surfactant in the porous ceramics is improved by soaking treatment, and the ultrasonic treatment is further combined to strengthen the wet contact effect, effectively improving the solubility of particles in the porous ceramics and the removal effect of the ionic solution; at the same time, the addition of the surfactant in this application can make the solution have a lower surface tension than water and a higher density. It works on the basis of dissolving inorganic matter, and the extremely low surface tension enables it to penetrate small cracks or blind holes.

[0065] In some embodiments, during the second cleaning process, the immersion treatment time is 3 to 5 minutes, for example, 3.0 minutes, 3.2 minutes, 3.4 minutes, 3.6 minutes, 3.8 minutes, 4.0 minutes, 4.2 minutes, 4.4 minutes, 4.6 minutes, 4.8 minutes or 5.0 minutes.

[0066] In some embodiments, during the second cleaning, the ultrasonic treatment time is 10 to 20 minutes. Optionally, the ultrasonic treatment temperature is 40 to 50°C, for example, 40°C, 41°C, 42°C, 43°C, 44°C, 45°C, 46°C, 47°C, 48°C, 49°C or 50°C.

[0067] The present application controls the temperature of ultrasonic treatment. The cavitation effect is strong during the ultrasonic process. Too high a temperature can easily cause a drop in boost pressure, affecting the cleaning effect.

[0068] Alternatively, the power of the ultrasonic treatment may be 20 to 40 W / cm 3 , for example 20W / cm 3 , 22W / cm 3 , 24W / cm 3 、26W / cm 3 、28W / cm 3 、30W / cm 3 、32W / cm 3 、34W / cm 3 、36W / cm 3 、38W / cm 3 or 40W / cm 3 The frequency may be 20 to 40 kHz, for example 20 kHz, 22 kHz, 24 kHz, 26 kHz, 28 kHz, 30 kHz, 32 kHz, 34 kHz, 36 kHz, 38 kHz or 40 kHz. W / cm 3 It represents the number of watts per cubic centimeter.

[0069] The present application controls the parameters during the ultrasonic treatment process to effectively ensure the cleaning effect and cleaning efficiency while avoiding "cavitation" corrosion.

[0070] In some embodiments, the flushing treatment lasts for 3 to 7 minutes.

[0071] In some embodiments, the rinsing treatment uses water.

[0072] In some embodiments, the flushing process includes at least one forward flushing and at least one reverse flushing. It should be noted that the forward flushing and reverse flushing are only used to indicate that the directions of the two flushings are different, and are not used to limit the specific flushing direction during the forward flushing or the specific flushing direction during the reverse flushing. For example, the forward flushing can be flushed from the top to the bottom of the porous ceramic, and the reverse flushing can be flushed from the bottom to the top of the porous ceramic.

[0073] Exemplarily, the present application provides a non-limiting second cleaning process, comprising:

[0074] First surfactant cleaning treatment: soak the porous ceramic in the surfactant for 3 to 5 minutes, and then perform ultrasonic treatment for 10 to 20 minutes;

[0075] Flushing treatment: flushing the porous ceramic after the first surfactant cleaning treatment at least once in a forward direction and at least once in a reverse direction, the flushing time being 3 to 7 minutes;

[0076] Second surfactant cleaning treatment: soak the rinsed porous ceramic in a surfactant for 3 to 5 minutes, and then perform ultrasonic treatment at 40 to 50° C. for 10 to 20 minutes.

[0077] It should be noted that the "first" and "second" in the first surfactant cleaning and the second surfactant cleaning only represent the difference in the two surfactant cleaning steps. In addition, the present application does not limit the surfactants used in the first surfactant cleaning and the second surfactant cleaning, and the types of surfactants used in the two cleanings can be the same or different. Preferably, the surfactants used in both cleanings are new surfactants.

[0078] In some embodiments, the first cleaning comprises sequentially immersing the porous ceramic in an ionic solution and performing an ultrasonic treatment.

[0079] In the present application, the porous ceramic is soaked and ultrasonically treated with an ionic solution to improve the wetting effect of the ionic solution on the porous ceramic, and then under the action of the ultrasonic treatment, the removal of dust particles by the ionic solution is improved.

[0080] In some embodiments, the porous ceramic is immersed in the ionic solution for 5 to 10 minutes, for example, 5.0 minutes, 5.5 minutes, 6.0 minutes, 6.5 minutes, 7.0 minutes, 7.5 minutes, 8.0 minutes, 8.5 minutes, 9.0 minutes, 9.5 minutes or 10.0 minutes.

[0081] In some embodiments, the time for ultrasonic treatment of the porous ceramic with the ionic solution is 15 to 25 minutes, for example, 15 minutes, 16 minutes, 17 minutes, 18 minutes, 19 minutes, 20 minutes, 21 minutes, 22 minutes, 23 minutes, 24 minutes or 25 minutes. Optionally, the temperature of the ultrasonic treatment is 40 to 50°C, for example, 40°C, 41°C, 42°C, 43°C, 44°C, 45°C, 46°C, 47°C, 48°C, 49°C or 50°C.

[0082] In some embodiments, the first cleaning further comprises: washing the porous ceramic with water before soaking it in the ion solution.

[0083] Optionally, the water washing treatment includes: sequentially performing spraying treatment, immersion treatment and ultrasonic treatment on the porous ceramic using water.

[0084] In some embodiments, during the water washing process, the spraying treatment is performed at least once, and the duration of each spraying treatment is 1 to 5 minutes, for example, 1.0 min, 1.5 min, 2.0 min, 2.5 min, 3.0 min, 3.5 min, 4.0 min, 4.5 min or 5.0 min.

[0085] In some embodiments, during the water washing process, the soaking time is 3 to 5 minutes, for example, 3.0 minutes, 3.2 minutes, 3.4 minutes, 3.6 minutes, 3.8 minutes, 4.0 minutes, 4.2 minutes, 4.4 minutes, 4.6 minutes, 4.8 minutes or 5.0 minutes.

[0086] In some embodiments, during the water washing process, the ultrasonic treatment time is 15 to 25 minutes, for example, 15 minutes, 16 minutes, 17 minutes, 18 minutes, 19 minutes, 20 minutes, 21 minutes, 22 minutes, 23 minutes, 24 minutes or 25 minutes. Optionally, the ultrasonic treatment temperature is 40 to 50°C, for example, 40°C, 41°C, 42°C, 43°C, 44°C, 45°C, 46°C, 47°C, 48°C, 49°C or 50°C.

[0087] Exemplarily, the present application provides a non-limiting first cleaning process, comprising:

[0088] The porous ceramic is subjected to water washing treatment, including spraying with water for 1 to 5 minutes, soaking for 3 to 5 minutes, and ultrasonic treatment for 15 to 25 minutes in sequence;

[0089] The porous ceramic after water washing is immersed in an ion solution for 5 to 10 minutes, and then ultrasonically treated in the ion solution for 15 to 25 minutes, wherein the temperature of the ultrasonic treatment is 40 to 50°C.

[0090] In some embodiments, the cleaning method further comprises disinfecting the porous ceramic after the second cleaning, and the disinfection comprises:

[0091] The porous ceramic is sequentially subjected to immersion treatment and ultrasonic treatment using water, and then sequentially subjected to disinfectant spraying treatment and drying treatment.

[0092] In some embodiments, during the disinfection treatment, the immersion treatment time is 3 to 5 minutes, for example, 3.0 minutes, 3.2 minutes, 3.4 minutes, 3.6 minutes, 3.8 minutes, 4.0 minutes, 4.2 minutes, 4.4 minutes, 4.6 minutes, 4.8 minutes or 5.0 minutes.

[0093] In some embodiments, in the disinfection treatment, the ultrasonic treatment time is 10 to 20 minutes, for example, 10 minutes, 11 minutes, 12 minutes, 13 minutes, 14 minutes, 15 minutes, 16 minutes, 17 minutes, 18 minutes, 19 minutes or 20 minutes. Optionally, the ultrasonic treatment temperature is 40 to 50 degrees Celsius, for example, 40 degrees Celsius, 41 degrees Celsius, 42 degrees Celsius, 43 degrees Celsius, 44 degrees Celsius, 45 degrees Celsius, 46 degrees Celsius, 47 degrees Celsius, 48 ​​degrees Celsius, 49 degrees Celsius or 50 degrees Celsius.

[0094] In some embodiments, the disinfectant spray treatment is performed at least three times, and the duration of each disinfectant spray treatment is 1 to 5 minutes, for example, 1.0 min, 1.5 min, 2.0 min, 2.5 min, 3.0 min, 3.5 min, 4.0 min, 4.5 min or 5.0 min.

[0095] In some embodiments, when performing the disinfection treatment, the disinfectant used includes an ethanol solution. For example, the mass concentration of the ethanol solution may be 75%.

[0096] In the present application, ethanol is used to disinfect the porous ceramics, thereby achieving rapid drying and enhancing the disinfection effect.

[0097] In some embodiments, the drying process includes blowing and drying with hot air.

[0098] In some embodiments, the drying temperature is 90-110° C., for example, 90° C., 92° C., 94° C., 96° C., 98° C., 100° C., 102° C., 104° C., 106° C., 108° C., or 110° C. Optionally, the drying time is 10-90 min, for example, 10 min, 20 min, 30 min, 40 min, 50 min, 60 min, 70 min, 80 min, or 90 min.

[0099] In the following examples and comparative examples, the porous ceramic used a ceramic atomization core with a porosity of 52%, a median diameter of the pores of 18 μm, and an ultrasonic treatment power of 30 W / cm 3 , the frequency is 30kHz.

[0100] Other raw materials not otherwise specified are common commercially available products.

[0101] Example 1

[0102] (1) First cleaning

[0103] The porous ceramics were subjected to water washing treatment, including spraying with water for 2 minutes, soaking for 5 minutes, and ultrasonic treatment at 45°C for 20 minutes in sequence;

[0104] The washed porous ceramics were immersed in an ionic solution for 10 minutes, and then ultrasonically treated in the ionic solution at 45°C for 20 minutes, wherein the ionic solution was a sodium chloride solution with a mass concentration of 10%;

[0105] (2) Second cleaning

[0106] First surfactant cleaning treatment: the porous ceramic after the first cleaning is immersed in the surfactant for 4 minutes, and then subjected to ultrasonic treatment at 50°C for 15 minutes. The surfactant is sodium cocoyl glutamate, and the hydrophilic-lipophilic ratio is 13;

[0107] Flushing treatment: The porous ceramics after the first surfactant cleaning treatment are subjected to two forward flushing and two reverse flushings, and the total flushing time is 5 minutes;

[0108] Second surfactant cleaning treatment: the porous ceramics after rinsing were immersed in surfactant for 4 minutes, and then ultrasonically treated at 50°C for 15 minutes. The surfactant was polysorbate 80, and the hydrophilic-lipophilic ratio was 15.

[0109] (3) Disinfection

[0110] After the second cleaning, the porous ceramics were soaked in water for 5 minutes, ultrasonically treated at 40°C for 15 minutes, and then sprayed with ethanol three times, each spraying time was 3 minutes, and finally dried in hot air at 100°C for 50 minutes.

[0111] Example 2

[0112] (1) First cleaning

[0113] The porous ceramics were subjected to water washing treatment, including spraying with water for 5 minutes, soaking for 3 minutes, and ultrasonic treatment at 40°C for 15 minutes;

[0114] The washed porous ceramics were immersed in an ionic solution for 5 minutes, and then ultrasonically treated in the ionic solution at 40°C for 15 minutes. The ionic solution was a sodium chloride solution with a mass concentration of 10%.

[0115] (2) Second cleaning

[0116] First surfactant cleaning treatment: the porous ceramic after the first cleaning is immersed in a surfactant for 5 minutes, and then subjected to ultrasonic treatment at 40°C for 10 minutes. The surfactant is potassium cocoyl glycinate, and the hydrophilic-lipophilic ratio is 14;

[0117] Flushing treatment: the porous ceramics after the first surfactant cleaning treatment are subjected to one forward flushing and one reverse flushing, and the total flushing time is 7 minutes;

[0118] Second surfactant cleaning treatment: soak the rinsed porous ceramic in surfactant for 5 minutes, and then perform ultrasonic treatment at 40°C for 10 minutes. The surfactant is potassium cocoyl glycinate, and the hydrophilic-lipophilic ratio is 14.

[0119] (3) Disinfection

[0120] The porous ceramics after the second cleaning were soaked in water for 3 minutes, ultrasonically treated at 45°C for 10 minutes, then sprayed with ethanol four times, each spraying time was 1 minute, and finally dried in hot air at 90°C for 90 minutes.

[0121] Example 3

[0122] (1) First cleaning

[0123] The porous ceramic was subjected to a water washing treatment, including spraying with water for 3 minutes, soaking for 4 minutes, and ultrasonic treatment at 50°C for 25 minutes in sequence;

[0124] The washed porous ceramics were immersed in an ionic solution for 8 minutes, and then ultrasonically treated in the ionic solution at 50° C. for 25 minutes. The ionic solution was a sodium chloride solution with a mass concentration of 10%.

[0125] (2) Surfactant cleaning

[0126] First surfactant cleaning treatment: soak the porous ceramic after the first cleaning in the surfactant for 3 minutes, and then perform ultrasonic treatment at 45°C for 20 minutes. The surfactant is polysorbate 80, and the hydrophilic-lipophilic ratio is 15;

[0127] Flushing treatment: the porous ceramics after the first surfactant cleaning treatment are subjected to one forward flushing and one reverse flushing, and the total flushing time is 3 minutes;

[0128] Second surfactant cleaning treatment: the porous ceramics after the rinse treatment were immersed in the surfactant for 3 minutes, and then subjected to ultrasonic treatment at 45°C for 20 minutes. The surfactant was polysorbate 80, and the hydrophilic-lipophilic ratio was 15.

[0129] (3) Disinfection

[0130] The porous ceramics after the second cleaning were soaked in water for 4 minutes, ultrasonically treated at 50°C for 20 minutes, and then sprayed with ethanol three times, each spraying time was 5 minutes, and finally dried in hot air at 110°C for 10 minutes.

[0131] Example 4

[0132] The porous ceramics were cleaned according to the cleaning method of Example 1, with the only difference being that in the second cleaning step, all surfactants were replaced with paraffin wax, and the hydrophile-lipophile balance value was 0.

[0133] Example 5

[0134] The porous ceramics were cleaned according to the cleaning method of Example 1, with the only difference being that in the second cleaning step, all surfactants were replaced with polyethylene glycol, and the hydrophile-lipophile balance value was 20.

[0135] Example 6

[0136] The porous ceramics were cleaned according to the cleaning method of Example 1, with the only difference being that in the second cleaning step, the ultrasonic treatment time in both the first surfactant cleaning treatment and the second surfactant cleaning treatment was adjusted to 25 min, so that the second cleaning time was longer than the first cleaning time.

[0137] Comparative Example 1

[0138] The porous ceramic is cleaned according to the cleaning method of Example 1, except that the first cleaning is not performed.

[0139] Comparative Example 2

[0140] The porous ceramics are cleaned according to the cleaning method of Example 1, except that no second cleaning is performed.

[0141] Comparative Example 3

[0142] The porous ceramics were cleaned according to the cleaning method of Example 1, except that the ionic solution in the first cleaning step was replaced with water.

[0143] Comparative Example 4

[0144] The porous ceramics were cleaned according to the cleaning method of Example 1, except that the surfactant in the second cleaning step was replaced by water.

[0145] Comparative Example 5

[0146] The porous ceramics are cleaned according to the cleaning method of Example 1, with the only difference being that the ionic solution in the first cleaning step is replaced by water, and the surfactant in the second cleaning step is replaced by water.

[0147] Comparative Example 6

[0148] The porous ceramics are cleaned according to the cleaning method of Example 1, the only difference being that the porous ceramics are sequentially cleaned for the second time, cleaned for the first time and disinfected, that is, only the steps of the first cleaning and the second cleaning are swapped.

[0149] Comparative Example 7

[0150] The porous ceramics were cleaned according to the cleaning method of Example 1, with the only difference being that the surfactant in the second cleaning was replaced by the ion solution in the first cleaning.

[0151] Comparative Example 8

[0152] The porous ceramics are cleaned according to the cleaning method of Example 1, the only difference being that the ionic solution in the first cleaning is replaced by a surfactant.

[0153] Comparative Example 9

[0154] The porous ceramic is cleaned according to the cleaning method of Example 1, the only difference being that the ionic solution in the first cleaning is replaced by a mixture of an ionic solution and a surfactant in a mass ratio of 1:1, and the surfactants in the second cleaning are replaced by a mixture of an ionic solution and a surfactant in a mass ratio of 1:1.

[0155] Test Case

[0156] The porous ceramics after cleaning in the above-mentioned embodiments and comparative examples are subjected to dust detection, and the detection method includes:

[0157] At room temperature of 25°C and 101 kPa, a smoking cycle simulator (CAMBUSTION, CamBridge) was used to smoke the electronic cigarette including the above-mentioned porous ceramic. The e-liquid used propylene glycol (VG) and propylene glycol (PG) in a mass ratio of 4:6. The resistance of the atomizer heating wire was 1.0Ω, the heating voltage was 3.5V, each puff was 2s, the puff interval was 15s, and the capacity of each puff was 35mL. The generated aerosol smoke entered the rapid particle size spectrometer (CAMBUSTION DMS500) to measure the dust content in the aerosol particles in real time. The test results are shown in Table 1.

[0158] Table 1

[0159] serial number Dust content / mg Example 1 7.2 Example 2 10.4 Example 3 11.5 Example 4 12.8 Example 5 8.5 Example 6 11.9 Comparative Example 1 10.6 Comparative Example 2 12.7 Comparative Example 3 13.5 Comparative Example 4 15.3 Comparative Example 5 16.7 Comparative Example 6 13 Comparative Example 7 16.5 Comparative Example 8 13 Comparative Example 9 11.9

[0160] From the above table we can see that:

[0161] Comparing Example 1 of the present application with Examples 4-5, it can be seen that the present application effectively improves the cleaning effect by controlling the hydrophilic-lipophilic balance value of the surfactant.

[0162] Comparing Example 1 with Example 6 of the present application, it can be seen that the present application can ensure the cleaning effect and avoid damaging the main body structure by controlling the cleaning time. Too long cleaning time will affect the structural properties of the porous ceramic.

[0163] Comparing Example 1 of the present application with Comparative Examples 1-9, it can be seen that the present application first uses an ionic solution for cleaning, which has a surface tension greater than that of pure water and can effectively remove powder particles generated by the electrostatic effect during the ceramic processing process; then a second cleaning is used, which can further dissolve the tiny particles on the surface of the porous ceramic while effectively removing the ionic solution, thereby achieving sufficient flushing of the porous ceramic and effectively preventing the problem of flying powder.

[0164] The cleaning process of this application is divided into three processes. The first process uses a conductive ionic solution, whose surface tension is greater than that of pure water, which can effectively remove the powder particles generated by the electrostatic effect during the processing of ceramics. Compared with the prior art using acidic or alkaline solutions, the use of ionic solutions and pure water for soaking can avoid the corrosion of the ceramic atomization core due to the difficulty in controlling the cleaning time; the second cleaning process uses a surfactant to remove the residual ionic solution in the first cleaning process, and can appropriately optimize the cleaning effect of the ultrasonic cleaning method, dissolving the tiny particles on the surface of the porous ceramics. The combination of the two effects can thoroughly clean the ceramic atomization core and solve the problem of flying powder. In the third cleaning process, in order to improve the cleaning effect, clean pure water is used for ultrasonic cleaning and disinfected and dried with disinfectants. The whole process uses multiple spray soaking to reduce cross contamination, ensure the cleaning effect of the ceramic atomization core, and effectively prevent the problem of flying powder.

[0165] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0166] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A method for cleaning porous ceramics, characterized in that: The cleaning method comprises: The porous ceramic is first cleaned using an ionic solution; The porous ceramic is cleaned for the second time by using a surfactant, wherein the second cleaning includes a first surfactant cleaning treatment, a rinsing treatment, and a second surfactant cleaning treatment performed in sequence, wherein the first surfactant cleaning treatment includes an immersion treatment and an ultrasonic treatment, and the second surfactant cleaning treatment includes an immersion treatment and an ultrasonic treatment, wherein the temperature of the ultrasonic treatment is 40 to 50°C, and the power is 20 to 40W / cm 3 ; The porous ceramic has a porosity of 47 to 57%, a pore diameter of 17 to 20 μm, the ion solution includes at least one of a sodium chloride solution, a magnesium chloride solution and an ammonium chloride solution; the surfactant includes at least one of sodium lauroyl sarcosinate, isopropyl amide, potassium cocoyl glycinate and sodium cocoyl glutamate, and the hydrophile-lipophile balance value of the surfactant is 13 to 15.

2. The cleaning method according to claim 1, characterized in that The first cleaning time is 30 to 40 minutes, and the second cleaning time is 20 to 35 minutes.

3. The cleaning method according to claim 1, characterized in that The second cleaning also satisfies at least one of the following conditions: (1) The soaking time is 3 to 5 minutes; (2) The ultrasonic treatment time is 10 to 20 minutes and the temperature is 40 to 50° C.; (3) The duration of the flushing treatment is 3 to 7 minutes; (4) The rinsing treatment uses water; (5) The flushing process includes at least one forward flushing and at least one reverse flushing.

4. The cleaning method according to claim 1, characterized in that: The first cleaning comprises sequentially performing immersion treatment and ultrasonic treatment on the porous ceramic using an ion solution.

5. The cleaning method according to claim 4, characterized in that: The first cleaning also satisfies at least one of the following conditions: (1) The porous ceramic is immersed in the ionic solution for 5 to 10 minutes; (2) The porous ceramic is ultrasonically treated with the ionic solution for 15 to 25 minutes at a temperature of 40 to 50°C.

6. The cleaning method according to claim 4, characterized in that: The first cleaning further includes: washing the porous ceramic with water before soaking it in the ion solution.

7. The cleaning method according to claim 6, characterized in that: The water washing treatment comprises: using water to sequentially perform spraying treatment, immersion treatment and ultrasonic treatment on the porous ceramic.

8. The cleaning method according to claim 7, characterized in that: The water washing treatment satisfies at least one of the following conditions: (1) During the water washing process, the spraying treatment is performed at least once, and the duration of each spraying treatment is 1 to 5 minutes; (2) During the water washing process, the soaking time is 3 to 5 minutes; (3) During the water washing process, the ultrasonic treatment time is 15 to 25 minutes and the temperature is 40 to 50°C.

9. The cleaning method according to any one of claims 1 to 8, characterized in that: The cleaning method further comprises disinfecting the porous ceramic after the second cleaning, and the disinfection comprises: The porous ceramic is sequentially subjected to immersion treatment and ultrasonic treatment using water, and then sequentially subjected to disinfectant spraying treatment and drying treatment.

10. The cleaning method according to claim 9, characterized in that: The disinfection treatment satisfies at least one of the following conditions: (1) In the disinfection treatment, the soaking time is 3 to 5 minutes; (2) During the disinfection treatment, the ultrasonic treatment time is 10 to 20 minutes and the temperature is 40 to 50° C.; (3) The number of times of the disinfectant spraying treatment is at least three times, and the duration of each disinfectant spraying treatment is 1 to 5 minutes; (4) When performing the disinfection treatment, the disinfectant used includes an ethanol solution; (5) The drying process includes blowing and drying with hot air; (6) The drying process is performed at a temperature of 90 to 110° C. and for a time of 10 to 90 minutes.

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