CN114293198A - Ultraviolet degreasing process and application thereof in improving surface affinity of rolling oil on surface of plain aluminum foil - Google Patents
Ultraviolet degreasing process and application thereof in improving surface affinity of rolling oil on surface of plain aluminum foil Download PDFInfo
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- CN114293198A CN114293198A CN202111664913.XA CN202111664913A CN114293198A CN 114293198 A CN114293198 A CN 114293198A CN 202111664913 A CN202111664913 A CN 202111664913A CN 114293198 A CN114293198 A CN 114293198A
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- aluminum foil
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- ultraviolet
- oil
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- 239000011888 foil Substances 0.000 title claims abstract description 48
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 42
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 238000005238 degreasing Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000010731 rolling oil Substances 0.000 title claims abstract description 18
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 239000003921 oil Substances 0.000 abstract description 43
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 230000000052 comparative effect Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 238000001514 detection method Methods 0.000 description 6
- 238000004817 gas chromatography Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
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- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Lubricants (AREA)
Abstract
The application discloses an ultraviolet degreasing process and application thereof in improving the surface affinity of rolling oil on the surface of an aluminum foil, relating to the technical field of battery production; the method comprises the following steps: setting ultraviolet light power parameters and irradiation time; enabling ultraviolet light to act on the product to be degreased according to the power parameter; by adopting the technical scheme provided by the application, the efficient oil removal is realized while the mechanical property of the aluminum foil is not influenced, and the surface affinity of rolling oil on the surface of the plain aluminum foil is effectively improved.
Description
Technical Field
The application relates to the technical field of battery production, in particular to an ultraviolet degreasing process and application.
Background
In the process of manufacturing the aluminum foil of the battery, rolling is needed to manufacture the aluminum foil with the thickness required by the manufacturing process. High temperature is generated due to the deformation of the processed aluminum material in the rolling process, and the addition of rolling oil is needed to isolate oxygen in the air so as to protect the aluminum foil from being oxidized in the manufacturing process. The rolling oil is a mixture mainly containing heptane, and oil gas recycling equipment is arranged in the manufacturing process, so that volatilized oil gas is recycled, and after continuous recycling, the viscosity and the volatilization temperature of the oil gas are continuously increased, so that the oil gas cannot be used finally.
However, as the viscosity of the volatile substances on the surface continuously increases, the affinity on the surface continuously decreases, so that the oil stain on the surface is heavier, the coating cannot be normally coated on the surface of the aluminum foil, and the film layer is peeled off.
When a common plain foil is directly coated on a cathode material, the solvent is mostly dual-polarity NMP, so the dyne value is only larger than 32 for normal processing, and when a carbon-coated foil for a lithium ion battery is processed, a film layer is thinner and is mostly aqueous coating, so the carbon-coated foil has larger inadaptability for alkane-based rolling oil.
The traditional solution is degreasing, the existing degreasing methods mostly comprise two methods, the first method is corona degreasing, multiple groups of high-power supplies with the power of 3-5 KW are generally used, air is polarized to generate atmospheric plasma, oil molecules are cracked by indirectly utilizing the plasma, a large amount of ozone can be generated in the process, excessive heat can also act on the surface of the aluminum foil to generate an annealing phenomenon, so that the mechanical strength is reduced, and the surface structure of the aluminum foil can be influenced by controlling the power rate improperly and adjusting too much; in addition, corona degreasing is equivalent to breaking the aluminum foil, so that the tensile strength and elongation are reduced.
The second one is baking degreasing, when the method is adopted, in order to not damage the aluminum foil, only instantaneous high-temperature (after unreeling, the aluminum foil is rapidly overwound at the temperature of more than 200 ℃) or long-time low-temperature (80-120 ℃) degreasing is carried out, and vacuum equipment is also matched, so that the method is high in energy consumption, and although the dyne value is increased after degreasing, the oxidation resistance of the aluminum foil is reduced, and the aluminum foil is not easy to store for a long time; meanwhile, the method takes a long time, and the mechanical properties of the aluminum foil are slightly reduced.
Disclosure of Invention
The application provides an ultraviolet deoiling technology and its application in improving plain foil surface rolling oil surface affinity, adopts the technical scheme that this application provided to realize quick high-efficient deoiling when not causing the influence to aluminium foil mechanical properties, effectively improves plain foil surface rolling oil surface affinity.
In order to solve the technical problem, the present application provides an ultraviolet degreasing process and an application thereof in improving the affinity of the surface of rolling oil on the surface of an aluminum foil, and in a first aspect, the present application provides an ultraviolet degreasing process, which includes the following steps:
setting ultraviolet light power parameters and irradiation time;
enabling ultraviolet light to act on the product to be degreased according to the power parameter;
preferably, the product to be degreased is metal;
preferably, the product to be degreased is an aluminum foil;
preferably, the wavelength of the ultraviolet light is 250-400 nm;
in a second aspect, the present application provides an application of the ultraviolet degreasing process as described in any of the above in improving the surface affinity of rolling oil on the surface of an aluminum foil;
preferably, the application is to change the dyne value of the surface of the aluminum foil by acting ultraviolet light on the aluminum foil according to the set ultraviolet light power parameter.
Compared with the prior art, the beneficial effect of this application lies in:
(1) the ultraviolet light is used for degreasing in the battery production field creatively, and the surface dyne value of the aluminum foil is changed through the irradiation of the ultraviolet light so as to improve the coating effect of the aluminum foil;
(2) compared with corona oil removal, the ultraviolet oil removal process has oil removal efficiency which is comparable to that of corona oil removal, but the oil removal process has lower power and saves more energy under the condition of achieving the same oil removal effect, thereby being more beneficial to industrial production and saving production cost;
(3) compared with baking degreasing, the process provided by the application is far better than baking degreasing in degreasing efficiency, and in addition, the mechanical property of the aluminum foil is not affected;
(4) by means of the characteristic that ultraviolet light breaks bonds without generating heat and the treatment of concentrated energy on rolling oil, the surface dyne value can be improved to a coatable range in a short time, the mechanical characteristics of the aluminum foil are not affected, and meanwhile a certain amount of rolling oil can be kept to keep the metal shape of the surface of the aluminum foil.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
FIG. 1 is a graph showing the results of gas chromatography detection in comparative example 1;
FIG. 2 is a graph showing the results of gas chromatography detection in comparative example 2;
FIG. 3 is a graph showing the results of gas chromatography detection in comparative example 3;
FIG. 4 is a graph showing the results of gas chromatography detection in comparative example 4;
fig. 5 is a graph of the dyne test results of aluminum foil at different times of ultraviolet light exposure.
Detailed Description
In order to make the objects, features and advantages of the present invention comprehensible, specific embodiments accompanied with examples are described in detail below. Several embodiments of the invention are given below. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete:
the traditional treatment method for rolling oil on the surface of the aluminum foil comprises corona oil removal and baking oil removal, and then both the two methods can cause certain influence on the mechanical property of the aluminum foil;
in order to solve the above technical problem, the present embodiment provides the following technical solutions:
the embodiment provides an ultraviolet degreasing process, which comprises the following steps:
setting ultraviolet light power parameters and irradiation time;
enabling ultraviolet light to act on a product to be degreased according to power parameters;
further, the product to be degreased is a metal product;
furthermore, the product to be degreased is aluminum foil; among them, the aluminum foil referred to in the present application includes, but is not limited to, aluminum foil products for battery production;
specifically, the wavelength of the ultraviolet light is 250-400 nm;
furthermore, it should be noted that the ultraviolet power in the present application is not limited, and the oil removal efficiency can be further improved by increasing the ultraviolet intensity, and what intensity of ultraviolet intensity is selected is related to the oil layer thickness and the oil ester recovery frequency.
The following will be further illustrated from specific experiments:
example 1.
Taking W1-80 white oil of Cangzhou chemical sea oil refining chemical engineering as an experimental article, and respectively carrying out gas chromatography detection on the white oil before use and the white oil after use;
comparative example 1: white oil before use;
comparative example 2: white oil after use;
comparative example 3: carrying out ultraviolet irradiation on the used white oil for one minute;
comparative example 4: carrying out ultraviolet irradiation on the used white oil for two minutes;
wherein, the ultraviolet power is 1200W, and the specific result is shown in FIGS. 1-4;
referring to the results in fig. 1-4, it can be seen that after the white oil is used, organic impurities in the oil are significantly reduced after one minute of ultraviolet irradiation, and the white oil almost returns to the state before use after two minutes of irradiation; therefore, the ultraviolet light has obvious effect of removing impurities from the oil body which is repeatedly used for many times.
Example 2
After the aluminum foil is irradiated by ultraviolet rays, the actual oil removal condition is verified by the time for the pen to shrink; wherein, the shrinkage-free property is generally not qualified in 3 seconds;
experimental samples: a sample of commercially available aluminum foil (mintai 1060H 1813 um);
ultraviolet light power: 1200W;
see figure 5 for specific results; as can be seen in FIG. 5, the raw foil 32 failed due to dynes, and the raw foil 28 passed due to dynes;
furthermore, when the irradiation time is 2s, the dyne detection effect is optimal; as the light time is lengthened, the oil ester starts to cohere, and the contraction time tends to decrease, but the whole 28 and 32 are qualified, namely, the good oil removing effect can be realized.
Example 3
This example further compares the degreasing effects of baking degreasing and ultraviolet light degreasing, wherein the relevant experimental conditions are shown in example 2;
(1) the hot baking degreasing dyne 32 test at different times shows the specific results in table 1;
TABLE 1
| Time of baking | 0hr | 0.5hr | 1hr | 3hr | 6hr |
| Without using white oil | 20s | 35s | 49s | Does not shrink | Does not shrink |
| Unrecoverable white oil | 8s | 8s | 16s | 24s | 30s |
(2) Dyne 32 tests under ultraviolet irradiation of different durations after 0.5 hour baking at 120 ℃ for degreasing show that the specific results are shown in Table 2;
TABLE 2
| Time of exposure to purple light | 0s | 10s | 20s | 30s | 60s |
| Without using white oil | 35s | 38s | 40s | 63s | 60s |
| Unrecoverable white oil | 8s | 9s | 7s | 5s | 4s |
(3) Dyne 32 tests under ultraviolet irradiation of different durations after baking at 120 ℃ for 6 hours to remove oil are carried out, and specific results are shown in table 3;
TABLE 3
| Time of exposure to purple light | 0s | 10s | 20s | 30s | 60s |
| Without using white oil | Does not shrink | Does not shrink | Does not shrink | Does not shrink | Does not shrink |
| Unrecoverable white oil | 30s | 35s | 53s | 33s | 25s |
Comparing table 1 and table 2, the dyne 32 test result without using white oil under 0.5 hour of baking oil removal is 35s, but after 10s of ultraviolet irradiation, the time can be prolonged to 38 s; furthermore, after 30s of ultraviolet irradiation, the shrinkage time reaches 63s, and the effect is far better than that of the effect of removing oil by simply using thermal baking for 1 hour; therefore, the degreasing process provided by the application can effectively improve the surface affinity of the rolling oil on the surface of the aluminum foil.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The above description is only for the preferred embodiment of the present application and should not be taken as limiting the present application in any way, and all simple modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present application are intended to be included within the scope of the present application.
Claims (6)
1. An ultraviolet degreasing process is characterized in that: the method comprises the following steps:
setting ultraviolet light power parameters and irradiation time;
and enabling the ultraviolet light to act on the product to be degreased according to the power parameter.
2. The ultraviolet light degreasing process as set forth in claim 1, wherein: the product to be degreased is metal.
3. The ultraviolet light degreasing process as set forth in claim 2, characterized in that: the product to be degreased is aluminum foil.
4. The ultraviolet light degreasing process as set forth in claim 1, wherein: the wavelength of the ultraviolet light is 250-400 nm.
5. Use of the process for degreasing by ultraviolet light according to any one of claims 1 to 4 for improving the surface affinity of rolling oil on the surface of an aluminum foil.
6. The application of the ultraviolet degreasing process in improving the surface affinity of rolling oil on the surface of an aluminum foil according to claim 5, wherein the rolling oil comprises the following components in percentage by weight: the application is that ultraviolet light with set ultraviolet light power parameters acts on the aluminum foil to change the surface dyne value of the aluminum foil.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111664913.XA CN114293198A (en) | 2021-12-30 | 2021-12-30 | Ultraviolet degreasing process and application thereof in improving surface affinity of rolling oil on surface of plain aluminum foil |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4028135A (en) * | 1976-04-22 | 1977-06-07 | The United States Of America As Represented By The Secretary Of The Army | Method of cleaning surfaces by irradiation with ultraviolet light |
| CN107059033A (en) * | 2017-03-27 | 2017-08-18 | 江苏大亚铝业有限公司 | A kind of oil removing process for improving medicinal aluminum foil moistened surface tension force |
| CN113385536A (en) * | 2021-06-29 | 2021-09-14 | 山东德利铝业科技有限公司 | Battery aluminum foil production method for improving surface dyne value |
-
2021
- 2021-12-30 CN CN202111664913.XA patent/CN114293198A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4028135A (en) * | 1976-04-22 | 1977-06-07 | The United States Of America As Represented By The Secretary Of The Army | Method of cleaning surfaces by irradiation with ultraviolet light |
| CN107059033A (en) * | 2017-03-27 | 2017-08-18 | 江苏大亚铝业有限公司 | A kind of oil removing process for improving medicinal aluminum foil moistened surface tension force |
| CN113385536A (en) * | 2021-06-29 | 2021-09-14 | 山东德利铝业科技有限公司 | Battery aluminum foil production method for improving surface dyne value |
Non-Patent Citations (1)
| Title |
|---|
| 肖成伟 主编: "《电动汽车工程手册 动力蓄电池》", vol. 1, 30 November 2020, 机械工业出版社, pages: 187 - 191 * |
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