Preparation Method of Oil-Storage Cotton and Atomizer for Electronic Cigarette

Abstract

The present invention provides a method for preparing oil-storing cotton, comprising the following steps: providing fiber cotton; immersing the fiber cotton in a first solution containing cellulose acetate so that the first solution containing cellulose acetate is adsorbed on the fiber cotton; immersing the fiber cotton in a second solution so that the cellulose acetate precipitates from the first solution and adheres to the fiber cotton; wherein the solubility of the cellulose acetate in the second solution is less than the solubility of the cellulose acetate in the first solution; drying the fiber cotton to obtain the oil-storing cotton. The oil-storing cotton prepared by this preparation method has good oil storage capacity and oil locking capacity. The present invention also provides an atomizer for an electronic cigarette.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic cigarettes, and in particular to a method for preparing an oil storage cotton and an atomizer for an electronic cigarette. Background Art

[0002] An electronic cigarette, also known as a virtual cigarette, a vapor cigarette, an aerosol generating device, etc., is mainly used to simulate the feeling of smoking without affecting health for smoking cessation or replacing cigarettes.

[0003] The atomizer of an electronic cigarette is the core component of the electronic cigarette, and the oil storage cotton is one of the important components of the atomizer of the electronic cigarette. The main function of the oil storage cotton is to store e-liquid. The oil storage capacity and oil locking capacity of the oil storage cotton are closely related to the service life of the oil storage cotton and the smoking taste of the electronic cigarette. The stronger the oil storage capacity and oil locking capacity of the oil storage cotton, the longer the service life of the oil storage cotton (no need to frequently replace the oil storage cotton or frequently refill e-liquid), the larger the smoke volume of the electronic cigarette, the better the smoking taste, and it is also beneficial to the miniaturization design of the electronic cigarette (for the same e-liquid storage capacity, the stronger the oil storage capacity of the oil storage cotton, the smaller the volume required for the oil storage cotton).

[0004] The existing oil storage cotton mainly uses PP+PE material, or PET material, or PA+PET material. In terms of oil storage capacity and oil locking capacity, since PA is added to the PA+PET material and amide bonds are contained in PA, and the amide bonds match the e-liquid in polarity, it can have a strong adsorption effect with the e-liquid, improving the oil storage capacity and oil locking capacity of the oil storage cotton. After testing, the oil storage capacity of the oil storage cotton using the PA+PET material is about 15 g / g (that is, each gram of oil storage cotton stores 15 grams of e-liquid), but this oil storage capacity has not yet met the existing requirements. In order to meet the requirements of the miniaturization design of the electronic cigarette and the service life of the oil storage cotton, it is urgent to improve the oil storage capacity and oil locking capacity of the oil storage cotton. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for preparing an oil storage cotton and an atomizer for an electronic cigarette. The oil storage cotton prepared by this preparation method has good oil storage capacity and oil locking capacity.

[0006] The present invention provides a method for preparing an oil storage cotton, including the following steps:

[0007] Provide fiber cotton;

[0008] Immerse the fiber cotton in a first solution containing cellulose acetate so that the first solution containing cellulose acetate is adsorbed on the fiber cotton;

[0009] Immerse the fiber cotton into the second solution, so that the cellulose acetate precipitates from the first solution and adheres to the fiber cotton; wherein, the solubility of the cellulose acetate in the second solution is less than the solubility of the cellulose acetate in the first solution;

[0010] Conduct a drying treatment on the fiber cotton, and then the oil storage cotton is obtained.

[0011] In an achievable manner, the first solution and the second solution are mutually soluble.

[0012] In an achievable manner, the cellulose acetate is insoluble in the second solution.

[0013] In an achievable manner, the first solution is glacial acetic acid solution.

[0014] In an achievable manner, the second solution is ethanol solution or methanol solution.

[0015] In an achievable manner, the ethanol solution is absolute ethanol solution.

[0016] In an achievable manner, the content of cellulose acetate in the first solution is 1 - 500 g / L.

[0017] In an achievable manner, the fiber cotton is made of PP and PE composite material, or PET material, or PET and PA composite material.

[0018] In an achievable manner, before immersing the fiber cotton into the first solution containing cellulose acetate, first conduct a plasma treatment on the fiber cotton to enhance the binding force of the fiber cotton to the cellulose acetate.

[0019] In an achievable manner, the specific steps of conducting a plasma treatment on the fiber cotton include:

[0020] Put the fiber cotton into a plasma treatment chamber, and use medium - frequency plasma of 20 - 100 KHz to treat for 10 - 600 seconds in an atmospheric atmosphere.

[0021] The present invention also provides an atomizer for an electronic cigarette, including an oil storage cotton, and the oil storage cotton is made by using the preparation method of the above - mentioned oil storage cotton.

[0022] The preparation method of the oil storage cotton provided by the present invention utilizes the different solubilities of cellulose acetate in the first solution and the second solution, so that the cellulose acetate precipitates from the first solution and adheres to the fiber cotton. This preparation method not only has a simple process, but also can make the cellulose acetate evenly adhere to the fiber cotton. At the same time, due to the rich polar groups in the molecular structure of cellulose acetate, the cellulose acetate adhering to the fiber cotton can increase the content of polar groups on the surface layer of the fiber cotton, thereby achieving the purpose of improving the oil storage capacity and oil locking capacity of the fiber cotton. The oil storage cotton prepared by this preparation method has good oil storage capacity and oil locking capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the production process of the oil storage cotton in the embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0024] The following will further describe in detail the specific embodiments of the present invention with reference to the drawings and embodiments. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0025] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present invention are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence.

[0026] The orientation terms such as up, down, left, right, front, back, top, bottom, etc. (if any) involved in the specification and claims of the present invention are defined based on the position of the structure in the drawing and the relative position between the structures, only for the sake of clarity and convenience of expressing the technical solution. It should be understood that the use of orientation terms should not limit the scope of the present invention claimed.

[0027] Figure 1 It is a schematic diagram of the production process of the oil storage cotton in the embodiment of the present invention. As Figure 1 shown, the preparation method of the oil storage cotton provided by the embodiment of the present invention includes the following steps:

[0028] S10: Provide fiber cotton, and the fiber cotton can be a common material for oil storage cotton;

[0029] S20: Immerse the fiber cotton in the first solution containing cellulose acetate, so that the first solution containing cellulose acetate is adsorbed on the fiber cotton;

[0030] S30: Immerse the fiber cotton in the second solution and place it for 1 - 20 minutes (preferably 3 - 10 minutes), so that the cellulose acetate precipitates from the first solution and adheres to the fiber cotton; wherein, the solubility of cellulose acetate in the second solution is less than the solubility of cellulose acetate in the first solution;

[0031] S40: After the cellulose acetate precipitates from the first solution and adheres to the fiber cotton, take the fiber cotton out of the second solution, and then dry the fiber cotton to remove the second solution in the fiber cotton, thus obtaining the oil storage cotton.

[0032] Specifically, for the preparation method of the oil storage cotton provided in this embodiment, by utilizing the different solubilities of cellulose acetate in the first solution and the second solution, the cellulose acetate precipitates from the first solution and adheres to the fiber cotton. This preparation method is not only simple in process, but also enables the cellulose acetate to adhere to the fiber cotton evenly. (Due to the material characteristics of cellulose acetate, it is very difficult to spin it into silk threads and compound it with the fiber cotton. Therefore, in this embodiment, this special method is adopted to make it adhere to the fiber cotton to modify the fiber cotton). At the same time, cellulose acetate is the product of cellulose acetylation. According to the degree of acetylation, it is divided into diacetate fiber and triacetate fiber. Since the molecular structure of cellulose acetate contains abundant polar groups, the cellulose acetate adhering to the fiber cotton can increase the content of polar groups on the surface layer of the fiber cotton, thereby achieving the purpose of improving the oil storage capacity and oil locking capacity of the fiber cotton. The oil storage cotton prepared by this preparation method has good oil storage capacity and oil locking capacity.

[0033] As an implementation manner, the first solution can be miscible with the second solution. In the above S30 step, when the fiber cotton is immersed in the second solution, the first solution and the second solution are miscible, and the solubility of cellulose acetate in the second solution is less than its solubility in the first solution, so that the cellulose acetate can precipitate from the first solution smoothly. If the first solution cannot be miscible with the second solution, then in the above S30 step, when the fiber cotton is immersed in the second solution, the first solution adsorbed in the fiber cotton will be layered with the second solution, making it difficult for the cellulose acetate in the first solution to enter the second solution and precipitate.

[0034] As a preferred implementation manner, cellulose acetate is insoluble in the second solution, which can promote the precipitation of cellulose acetate and improve the precipitation rate of cellulose acetate.

[0035] As a preferred implementation manner, the first solution is glacial acetic acid solution, and the second solution is ethanol solution or methanol solution. Preferably, the second solution is ethanol solution. Among them, the solubility of cellulose acetate in glacial acetic acid solution is greater than the solubility of cellulose acetate in ethanol solution (cellulose acetate is insoluble in ethanol solution), and glacial acetic acid solution can be miscible with ethanol solution.

[0036] Preferably, the ethanol solution is anhydrous ethanol solution to avoid the dissolution of cellulose acetate in water and affect its precipitation rate.

[0037] As an implementation manner, the content of cellulose acetate in the first solution is 1 - 500 g / L. Preferably, the content of cellulose acetate in the first solution is 5 - 500 g / L.

[0038] As an implementation manner, the fiber cotton is made of a composite material of PP (polypropylene) and PE (polyethylene), or is made of PET (polyethylene terephthalate) material, or is made of a composite material of PET and PA (polyamide). Preferably, the fiber cotton is made of a composite material of PET and PA. Since there is an amide bond in PA and the amide bond matches the e-liquid in terms of polarity, it can have a strong adsorption effect on the e-liquid, improving the oil storage capacity and oil locking capacity of the oil storage cotton.

[0039] As an implementation manner, the density of the fiber cotton is 0.03 - 0.1 g / cm 3 ³. Preferably, the density of the fiber cotton is 0.03 - 0.07 g / cm 3 ³.

[0040] As an implementation manner, before the above-mentioned step S20, that is, before immersing the fiber cotton into the first solution containing cellulose acetate, the fiber cotton is first subjected to plasma treatment to activate the surface fibers of the fiber cotton, thereby enhancing the binding force of the fiber cotton to cellulose acetate and making it easier for cellulose acetate to adhere to the fiber cotton.

[0041] As an implementation manner, the specific steps of the above-mentioned plasma treatment of the fiber cotton include:

[0042] Put the fiber cotton into a plasma treatment chamber and use medium-frequency plasma of 20 - 100 KHz (preferably 40 - 60 KHz) to treat it in an atmospheric atmosphere for 10 - 600 seconds (preferably 90 - 200 seconds).

[0043] As an implementation manner, in the above-mentioned step S40, the specific steps of drying the fiber cotton include:

[0044] First, put the fiber cotton into a centrifuge for centrifugation. The rotation speed of the centrifuge is set to 100 - 2000 revolutions per minute (preferably 200 - 500 revolutions per minute) to preliminarily remove the second solution in the fiber cotton; then put the fiber cotton into an oven for drying. The drying temperature is set to 80 °C and the drying time is 10 - 60 minutes (preferably 20 - 40 minutes) to completely remove the second solution in the fiber cotton.

[0045] The embodiment of the present invention also provides an atomizer for an electronic cigarette, which includes an oil storage cotton, and the oil storage cotton is made by using the above-mentioned preparation method of the oil storage cotton.

[0046] The preparation method of the oil storage cotton provided by the embodiment of the present invention utilizes the different solubilities of cellulose acetate in the first solution and the second solution, so that cellulose acetate precipitates from the first solution and adheres to the fiber cotton. This preparation method not only has a simple process, but also can make cellulose acetate evenly adhere to the fiber cotton. At the same time, due to the rich polar groups in the molecular structure of cellulose acetate, the attachment of cellulose acetate to the fiber cotton can increase the content of polar groups on the surface layer of the fiber cotton, thereby achieving the purpose of improving the oil storage capacity and oil locking capacity of the fiber cotton. The oil storage cotton prepared by this preparation method has good oil storage capacity and oil locking capacity, and the preparation process is simple, which is suitable for large-scale mass production.

[0047] The first embodiment

[0048] The preparation method of the oil storage cotton provided by this embodiment includes the following steps: controlling the humidity of the production environment to be 30%-50%, putting the fiber cotton (made of PA+PET material, with a density of 0.04 g / cm 3 ) into a plasma treatment chamber, using medium-frequency plasma of 40KHz, and treating it in an atmospheric atmosphere for 90 seconds; then immersing the fiber cotton into an acetic acid solution containing cellulose acetate, and the content of cellulose acetate in the acetic acid solution is 50 g / L; then putting the fiber cotton into an ethanol solution and placing it for 5 minutes; after the cellulose acetate precipitates, taking out the fiber cotton, putting it into a centrifuge for centrifugation, setting the centrifuge speed to 200 revolutions per minute, and then putting the fiber cotton into an oven for drying, setting the drying temperature to 80°C, and the drying time to 30 minutes. After drying, the oil storage cotton is obtained.

[0049] An oil absorption test is carried out on the oil storage cotton, and it is measured that the oil storage capacity of the oil storage cotton reaches 24 g / g (that is, each gram of oil storage cotton stores 24 grams of e-liquid), and the oil storage capacity of the oil storage cotton has been significantly improved.

[0050] The second embodiment

[0051] The preparation method of the oil storage cotton provided by this embodiment includes the following steps: controlling the humidity of the production environment to be 30%-50%, putting the fiber cotton (made of PA+PET material, with a density of 0.05 g / cm 3 ) into a plasma treatment chamber, using medium-frequency plasma of 20KHz, and treating it in an atmospheric atmosphere for 50 seconds; then immersing the fiber cotton into an acetic acid solution containing cellulose acetate, and the content of cellulose acetate in the acetic acid solution is 5 g / L; then putting the fiber cotton into an ethanol solution and placing it for 10 minutes; after the cellulose acetate precipitates, taking out the fiber cotton, putting it into a centrifuge for centrifugation, setting the centrifuge speed to 100 revolutions per minute, and then putting the fiber cotton into an oven for drying, setting the drying temperature to 80°C, and the drying time to 60 minutes. After drying, the oil storage cotton is obtained.

[0052] The oil absorption test was carried out on the oil storage cotton, and the oil storage capacity of the oil storage cotton reached 17 g / g. Compared with the first embodiment, since the content of acetate fiber in the glacial acetic acid solution was greatly reduced, the acetate fiber attached to the oil storage cotton decreased, and the oil storage capacity of the oil storage cotton also decreased accordingly.

[0053] Third Embodiment

[0054] The preparation method of the oil storage cotton provided in this embodiment includes the following steps: controlling the humidity of the production environment to be 30%-50%, putting the fiber cotton (made of PA+PET material, with a density of 0.03 g / cm 3 ) into a plasma treatment chamber, using medium-frequency plasma of 80 KHz, and treating it in an atmospheric atmosphere for 120 seconds; then immersing the fiber cotton in a glacial acetic acid solution containing acetate fiber, and the content of acetate fiber in the glacial acetic acid solution is 100 g / L; then putting the fiber cotton into an ethanol solution and placing it for 10 minutes; after the acetate fiber precipitates, taking out the fiber cotton, putting it into a centrifuge for centrifugal treatment, setting the centrifuge speed to 300 revolutions per minute, then putting the fiber cotton into an oven for drying, setting the drying temperature to 80°C, and the drying time to 30 minutes, and the oil storage cotton is obtained after drying.

[0055] The oil absorption test was carried out on the oil storage cotton, and the oil storage capacity of the oil storage cotton reached 29 g / g, and the oil storage capacity of the oil storage cotton was significantly improved.

[0056] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A preparation method of oil storage cotton, characterized in that, The steps include: Providing fiber cotton; Immersing the fiber cotton into a first solution containing cellulose acetate, so that the first solution containing cellulose acetate is adsorbed on the fiber cotton; the first solution is glacial acetic acid solution; Immersing the fiber cotton into a second solution, so that the cellulose acetate precipitates from the first solution and adheres to the fiber cotton; wherein, the solubility of the cellulose acetate in the second solution is less than the solubility of the cellulose acetate in the first solution; the second solution is ethanol solution or methanol solution; Performing a drying treatment on the fiber cotton, thus obtaining oil storage cotton.

2. The preparation method of the oil storage cotton according to claim 1, characterized in that, The ethanol solution is absolute ethanol solution.

3. The preparation method of the oil storage cotton according to claim 1, characterized in that, The content of cellulose acetate in the first solution is 1 - 500 g / L.

4. The preparation method of the oil storage cotton according to claim 1, characterized in that, The density of the fiber cotton is 0.03 - 0.1 g / cm 3 .

5. The preparation method of the oil storage cotton according to claim 1, characterized in that, Before immersing the fiber cotton into the first solution containing cellulose acetate, performing a plasma treatment on the fiber cotton to enhance the binding force of the fiber cotton to the cellulose acetate.

6. The preparation method of the oil storage cotton according to claim 5, characterized in that, The specific steps for performing the plasma treatment on the fiber cotton include: Putting the fiber cotton into a plasma treatment chamber, using medium-frequency plasma of 20 - 100 KHz, and treating for 10 - 600 seconds in an atmospheric atmosphere.

7. The preparation method of the oil storage cotton according to claim 1, characterized in that, The specific steps for performing the drying treatment on the fiber cotton include: First performing a centrifugation treatment on the fiber cotton to preliminarily remove the second solution in the fiber cotton; then performing a drying treatment on the fiber cotton to completely remove the second solution in the fiber cotton.

8. An atomizer for an electronic cigarette, comprising an oil storage cotton, characterized in that, The oil storage cotton is made by using the preparation method of the oil storage cotton according to any one of claims 1 - 7.

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