CN113634607B - Rolling oil of aluminum foil rolling mill and application of rolling oil in aluminum foil preparation - Google Patents
Rolling oil of aluminum foil rolling mill and application of rolling oil in aluminum foil preparation Download PDFInfo
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- CN113634607B CN113634607B CN202110749581.9A CN202110749581A CN113634607B CN 113634607 B CN113634607 B CN 113634607B CN 202110749581 A CN202110749581 A CN 202110749581A CN 113634607 B CN113634607 B CN 113634607B
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- aluminum foil
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 194
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 190
- 239000011888 foil Substances 0.000 title claims abstract description 190
- 238000005096 rolling process Methods 0.000 title claims abstract description 81
- 239000010731 rolling oil Substances 0.000 title claims abstract description 56
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 26
- 150000002148 esters Chemical class 0.000 claims abstract description 26
- 239000002253 acid Substances 0.000 claims abstract description 21
- 230000009467 reduction Effects 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 13
- -1 inorganic acid ester Chemical class 0.000 claims description 5
- 150000007522 mineralic acids Chemical class 0.000 claims description 5
- 238000005886 esterification reaction Methods 0.000 claims description 4
- 239000003921 oil Substances 0.000 abstract description 31
- 230000000694 effects Effects 0.000 abstract description 15
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052744 lithium Inorganic materials 0.000 abstract description 8
- 239000000126 substance Substances 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 6
- 238000003851 corona treatment Methods 0.000 abstract description 4
- 238000003860 storage Methods 0.000 abstract description 4
- 239000007769 metal material Substances 0.000 abstract description 2
- 238000003672 processing method Methods 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 34
- 230000000052 comparative effect Effects 0.000 description 12
- 238000005461 lubrication Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000011859 microparticle Substances 0.000 description 6
- 239000002199 base oil Substances 0.000 description 5
- 239000012467 final product Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000000576 coating method Methods 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- DLKQHBOKULLWDQ-UHFFFAOYSA-N 1-bromonaphthalene Chemical compound C1=CC=C2C(Br)=CC=CC2=C1 DLKQHBOKULLWDQ-UHFFFAOYSA-N 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000005097 cold rolling Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000002688 persistence Effects 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000012085 test solution Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0239—Lubricating
- B21B45/0242—Lubricants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/06—Lubricating, cooling or heating rolls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M171/00—Lubricating compositions characterised by purely physical criteria, e.g. containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. containing ingredients which are physically well-defined but for which the chemical nature is either unspecified or only very vaguely indicated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B2003/001—Aluminium or its alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2265/00—Forming parameters
- B21B2265/10—Compression, e.g. longitudinal compression
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/20—Metal working
- C10N2040/24—Metal working without essential removal of material, e.g. forming, gorging, drawing, pressing, stamping, rolling or extruding; Punching metal
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/20—Metal working
- C10N2040/244—Metal working of specific metals
- C10N2040/245—Soft metals, e.g. aluminum
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses rolling oil of an aluminum foil rolling mill and application of the rolling oil in aluminum foil preparation, and relates to the technical field of metal material processing methods. The rolling oil for the aluminum foil rolling mill comprises 5.5-6.5% of ester by mass, less than or equal to 1% of alcohol by mass and less than or equal to 0.25mg KOH/g of acid value. Through improving the content of ester in the aluminum foil rolling mill rolling oil and reducing the content of alcohol, and then reduced the surface contact angle of aluminum foil, the aluminum foil is under the condition that does not pass through corona treatment, through adjusting the technological parameter in the aluminum foil rolling process, reduces the oil film layer thickness on aluminum foil goods surface, has further reduced the surface contact angle of aluminum foil, makes the surface contact angle reach 28 at a minimum, has the effect that improves the cohesion of aluminum foil and other substances, and then has optimal result of use to the application field of lithium battery material, can satisfy long-time storage demand and can not lead to the aluminum foil contact angle increase, the storage time is more than 6 months.
Description
Technical Field
The invention relates to the technical field of metal material processing methods, in particular to aluminum foil rolling mill rolling oil and application thereof in aluminum foil preparation.
Background
The invention of CN104611616A discloses a preparation method of aluminum foil for a power functional material produced by using a cast-rolled blank, wherein in the preparation method, in the secondary cold rolling process, the mass percentage of alcohol in rolling oil for lubrication is 4.0-6.0%, the mass percentage of ester is 0.8-2.05%, the acid value is 0.2-0.3, the lubrication effect of rolling in the secondary cold rolling semi-finished product processing pass is ensured, the surface pollution effect of an aluminum plate is reduced, and the clean pollution of the surface quality of the aluminum plate is less than level 2; in the foil rolling process, the mass percentage of alcohol in the rolling oil for lubrication is 1.5-3.6%, the mass percentage of ester is 2.6-5.4%, the acid value is 0.12-0.25, the lubrication effect of foil rolling finished product processing pass rolling is ensured, the surface pollution effect is low, and the clean pollution of the aluminum plate surface quality is less than level 2.
The above invention also relates to control of the ester content, alcohol content and acid value in the rolling oil for improving the lubrication effect of aluminum foil rolling and reducing the surface contamination of aluminum plates, but the rolling oil of the invention cannot solve the problem of large contact angle of the aluminum foil surface.
Due to the particularity of the aluminum foil manufacturing process, the production of modern aluminum foils is usually achieved through a rolling mode, the rolling of the aluminum foils is usually performed by a foil rolling mill, during the rolling process of the aluminum foils, the aluminum foils are contacted with working rolls of the foil rolling mill, and the aluminum foils are thinned to a target thickness according to different rolling passes. In order to obtain a sufficient lubricating effect to ensure smooth progress of aluminum foil rolling, rolling oil is indispensable in the aluminum foil rolling process. The oil film remains on the surface of the aluminum foil after rolling, the surface tension of the traditional oil film is low, the increase of the surface contact angle of the aluminum foil is indirectly caused, the surface contact angle of the aluminum foil after rolling is more than or equal to 38 degrees, the binding force between an aluminum foil product and other substances is reduced, and the application field of directly coating the material on the surface of the aluminum foil is limited. For example, in the coating process of the aluminum foil of the current collector for the lithium battery, the oil film on the surface of the aluminum foil can cause the decrease of the binding force between the aluminum foil and the positive electrode material of the lithium battery, so that the coating process is invalid or the locally coated material is uneven, and the energy density of the lithium battery product is greatly reduced.
In order to reduce the surface contact angle of the aluminum foil and improve the binding force between the anode material and the aluminum foil, and achieve the effect of increasing the energy density of a lithium battery product, the common practice in the lithium battery industry is to pre-coat carbon on the surface of the aluminum foil or to pre-coat carbon on the surface of the aluminum foil by an aluminum foil manufacturer. The processing mode increases the production cost of the lithium battery and reduces the production efficiency.
Some aluminum foil manufacturers perform corona treatment on the surface of the aluminum foil, so that the oil film content on the surface of the aluminum foil is reduced, the effect of improving the surface tension of the aluminum foil is achieved, and the contact angle of the surface of the aluminum foil is further reduced. However, this corona treatment can only be effective in a short period of time, typically more than 3 months later, the surface contact angle of the aluminum foil further increases, eventually resulting in failure to achieve the customer's use result and a large amount of waste products.
Disclosure of Invention
The invention aims to overcome the defects that the surface contact angle of an aluminum foil is large and the binding force between an aluminum foil product and other substances is low due to the fact that an oil film remains on the surface of the aluminum foil after rolling in the prior art, and provides rolling oil for an aluminum foil rolling mill.
Another object of the present invention is to provide an application of rolling oil of an aluminum foil rolling mill in a rolling process of aluminum foil.
It is still another object of the present invention to provide a method for preparing an aluminum foil.
It is a further object of the present invention to provide an aluminum foil article.
The above object of the present invention is achieved by the following technical scheme:
the rolling oil for the aluminum foil rolling mill comprises 5.5-6.5% of ester by mass, less than or equal to 1% of alcohol by mass and less than or equal to 0.25mg KOH/g of acid value.
In the production of the aluminum foil industry, the mass percent of ester is 3-5%, the mass percent of alcohol is 3-6%, the rolling oil with the acid value of 0.3-1.0 mg KOH/g is used for increasing the oil film strength, but with the increase of rolling time, a large amount of inorganic acid is added in the rolling oil of an aluminum foil mill, the alcohol in the rolling oil of the aluminum foil mill and the inorganic acid generate esterification reaction to generate inorganic acid ester, the inorganic acid ester in the rolling oil of the aluminum foil mill can damage the oil film stability in the rolling process, so that the oil film is broken, the friction force between the aluminum foil and a working roller is increased, the thickness of an oil film layer is increased, the surface contact angle of the aluminum foil is increased, and finally the binding force between the aluminum foil and other substances is reduced.
According to the invention, the content of the ester in the rolling oil of the aluminum foil rolling mill is increased to 5.5-6.5%, the content of the alcohol is reduced to less than or equal to 1%, the acid value is controlled to less than or equal to 0.25mg KOH/g, the lubricating effect of the ester is superior to that of the alcohol, the friction coefficient of aluminum foil rolling can be reduced by the ester in the aluminum foil rolling process, the generation of aluminum powder microparticles and iron powder microparticles is greatly reduced, the generation of the esterification reaction of the alcohol and the inorganic acid in the rolling oil of the aluminum foil rolling mill is inhibited or reduced by the reduction of the alcohol content and the acid value, the generation of the inorganic acid ester is reduced, the effect of improving the oil film strength of the oil product is achieved, the stability of the oil film in the rolling process is improved, the occurrence of rupture of the oil film is greatly reduced, the smooth running of the aluminum foil rolling is facilitated, the thickness of the oil film layer is reduced, the surface contact angle of the aluminum foil is further reduced, the surface quality of an aluminum foil product is improved, and finally the binding force of the aluminum foil and other substances is improved.
Preferably, the mass percent of the alcohol in the rolling oil is 0.1-1%, and the acid value is 0.03-0.25 mg KOH/g.
Preferably, the mass percentage of the ester in the rolling oil is 5.8-6.3%, the mass percentage of the alcohol is 0.1-0.7%, and the acid value is 0.03-0.17 mg KOH/g.
Preferably, the mass percentage of the ester in the rolling oil is 6.1-6.3%, the mass percentage of the alcohol is 0.1-0.3%, and the acid value is 0.03-0.09 mg KOH/g.
Preferably, the flash point of the base oil in the aluminum foil mill rolling oil is 81-85 ℃.
The base oils used in the present invention are exemplified by model MOA-80, and the choice of base oils is not limited. The flash point of the base oil in the rolling oil of the aluminum foil rolling mill is selected within the range of 81-85 ℃, so that the viscosity of the rolling oil of the aluminum foil rolling mill is reduced, the friction between the aluminum foil and a working roller is reduced, the increase of aluminum powder microparticles and iron powder microparticles is reduced, the thickness of an oil film layer is reduced, the surface contact angle of the aluminum foil is further reduced, and the binding force between the aluminum foil and other substances is improved.
The invention provides application of the rolling oil of the aluminum foil rolling mill in a rolling process of aluminum foil.
The aluminum foil raw materials of the invention are 1235, 1060, 1070, 8011, 8021 and 8079 aluminum alloys in national standards.
The invention also specifically protects a preparation method of the aluminum foil, and rolling oil of an aluminum foil rolling mill is adopted for rolling.
The aluminum foil rolling process is as follows:
1. smelting raw aluminum into aluminum liquid;
2. rolling the molten aluminum obtained after smelting in the step 1 into a plate blank;
3. thinning and rolling the slab rolled in the step 2 again to obtain an aluminum foil blank;
4. and finally, rolling the aluminum foil rough material into an aluminum foil product with the target thickness.
In the process of rolling the aluminum foil blank into an aluminum foil product with a target thickness, a working roller of a foil rolling mill and rolling oil of the aluminum foil rolling mill for lubrication are contacted with the aluminum foil, and the aluminum foil is thinned to the target thickness according to the deformation capacities of different aluminum alloy foils and different rolling passes. Through the aluminum foil rolling process, the final thickness of the aluminum foil product prepared by the method is in the range of 0.008-0.03 mm.
Preferably, the reduction of the aluminum foil final product is 25% -38% in pass rolling.
The rolling reduction means the difference between the thickness of the aluminum foil before rolling and the thickness of the aluminum foil after rolling. The reduction of the aluminum foil final product during pass rolling is controlled to be 25% -38%, so that the brightness and the flatness of the surface of the aluminum foil product are improved, and the effect of reducing the surface contact angle of the aluminum foil product is achieved. When the reduction in reduction is reduced, an increase in the contact angle of the aluminum foil surface will result.
Preferably, the reduction of the aluminum foil final product is 30% -35% in pass rolling.
Preferably, the coiling tension of the final finished aluminum foil pass is 36-55N/mm 2 。
The lubricating effect of the ester is superior to that of alcohol, the friction coefficient of aluminum foil rolling can be reduced in the aluminum foil rolling process by the ester, the generation of aluminum powder microparticles and iron powder microparticles is greatly reduced, but the increase of the mass percent of the ester to 5.5-6.5% can cause obvious reduction of rolling force (force applied to the aluminum foil by a working roller), and the plate shape of the aluminum foil is further influenced, for example, the flatness of the aluminum foil is influenced. By reducing the coiling tension of 36-55N/mm of the final finished product pass of the aluminum foil 2 The forward slip is reduced, the rolling force in the aluminum foil rolling process can be improved, and therefore the adverse effect of reduction of the rolling force caused by the increase of the ester content is eliminated or weakened, and the influence of the increase of the mass percentage of the ester on the aluminum foil plate type is reduced.
Preferably, the coiling tension of the final finished aluminum foil pass is 40-48N/mm 2 。
The invention provides an aluminum foil product prepared by the preparation method of the aluminum foil.
Preferably, the thickness of an oil film layer on the surface of the aluminum foil product is less than or equal to 150nm.
The thickness of the oil film layer on the surface of the aluminum foil product is reduced to be less than or equal to 150nm, which is favorable for reducing the quantity of aluminum powder particles and iron powder particles in the oil film layer, thereby being favorable for reducing the contact angle of the surface of the aluminum foil.
Preferably, the thickness of the oil film layer on the surface of the aluminum foil product is 50-100 nm.
Compared with the prior art, the invention has at least one of the following beneficial technical effects:
1. according to the invention, the content of ester in the rolling oil of the aluminum foil rolling mill is increased to 5.5-6.5%, the content of alcohol is reduced to less than or equal to 1%, the acid value is controlled to less than or equal to 0.25mg KOH/g, the esterification reaction of alcohol and inorganic acid in the rolling oil of the aluminum foil rolling mill is inhibited or reduced, the generation of inorganic acid ester is reduced, the effect of improving the oil film strength of an oil product is achieved, the stability of the oil film in the rolling process is improved, the occurrence of cracking of the oil film is greatly reduced, the smooth running of the aluminum foil rolling is facilitated, the thickness of the oil film layer is reduced, the surface contact angle of the aluminum foil is further reduced, the surface quality of an aluminum foil product is improved, and finally the binding force of the aluminum foil and other substances is improved.
2. According to the preparation method of the aluminum foil, the reduction of the aluminum foil during rolling of the final finished product pass and the coiling tension of the final finished product pass are adjusted under the condition that the aluminum foil is not subjected to corona treatment, so that the thickness of an oil film layer on the surface of an aluminum foil product is reduced, the surface contact angle of the aluminum foil is further reduced, the minimum surface contact angle can reach 28 degrees, the binding force of the aluminum foil and other substances is improved, the optimal use effect is achieved for the application field of lithium battery materials, the long-time storage requirement can be met, the increase of the contact angle of the aluminum foil is avoided, and the storage time is longer than 6 months.
Detailed Description
The invention will be further described with reference to the following specific embodiments, but the examples are not intended to limit the invention in any way. Raw materials reagents used in the examples of the present invention are conventionally purchased raw materials reagents unless otherwise specified.
The contact angle is measured by a contact angle detecting instrument, 1-bromonaphthalene solution is uniformly adopted to measure the contact angle, in the embodiment, the contact angle detecting instrument is exemplified by a selection brand of Bai Oulin, model number THETALITE, and the selection of the contact angle detecting instrument is not limited. The method specifically comprises the following steps:
(1) Preparing 1-bromonaphthalene test solution, and cutting a sample to be tested into a size of 50 x 100 mm;
(2) Placing a sample to be tested on a test bench of a contact angle detection instrument, and dripping 10 mu L of the sample to be tested at one time;
(3) Photographs were taken by a contact angle measuring instrument and the contact angle was automatically calculated.
The oil film thickness measuring method specifically comprises the following steps:
(1) The sampling area of the aluminum foil product is 100mm 2 As a sample to be measured;
(2) Completing weighing of a sample to be measured within 30s by using an electronic balance to obtain G1;
(3) Rapidly placing the weighed aluminum foil product into a drying furnace for drying, wherein the drying time is 20min, and the drying temperature is 80-100 ℃;
(4) Weighing the dried aluminum foil product again by using an electronic balance to obtain G2;
(5) Thickness of oil film= (G1-G2)/(100 mm) 2 * Rolling oil density) of 0.792g/mL.
Example 1
The rolling oil for the aluminum foil rolling mill comprises 6.3 mass percent of ester, 0.1 mass percent of alcohol, 0.03mg KOH/g of acid value and 80 ℃ of flash point of base oil in the rolling oil.
A preparation method of aluminum foil comprises rolling an aluminum foil final product pass (final product pass refers to a production pass of rolling aluminum foil from a certain thickness to a final aluminum foil target thickness by a foil rolling mill) to obtain 33% reduction.
The coiling tension of the final finished product pass of the aluminum foil is 46N/mm 2 。
The aluminum foil is 8011 in national standard.
The thickness of the oil film layer on the surface of the finally obtained aluminum foil product is 60nm.
The aluminum foil surface contact angle produced in this example was 28 °.
Examples 2 to 17
Examples 2 to 17 differ from example 1 in that the mass percentage of esters, the mass percentage of alcohols and the acid value in the rolling oil were different. See table 1 for specific values. wt.% means mass percent.
Table 1 summary of rolling oil parameters, oil film thickness and aluminum foil surface contact angle in examples 1 to 17
| Esters (wt.%) | Alcohol (wt.%) | Acid value (mgKOH/g) | Surface contact angle (°) | |
| Example 1 | 6.3 | 0.1 | 0.03 | 28 |
| Example 2 | 5.6 | 0.8 | 0.23 | 32 |
| Implementation of the embodimentsExample 3 | 6.4 | 0.2 | 0.09 | 29 |
| Example 4 | 5.5 | 0.1 | 0.05 | 29 |
| Example 5 | 6.5 | 0.7 | 0.17 | 31 |
| Example 6 | 6.0 | 0.0 | 0.06 | 30 |
| Example 7 | 5.8 | 0.6 | 0.11 | 30 |
| Example 8 | 6.3 | 0.1 | 0.03 | 35 |
| Example 9 | 6.5 | 0.1 | 0.03 | 31 |
| Example 10 | 5.8 | 0.1 | 0.03 | 29 |
| Example 11 | 5.5 | 0.1 | 0.03 | 32 |
| Example 12 | 6.3 | 0.7 | 0.03 | 30 |
| Example 13 | 6.3 | 1 | 0.03 | 31 |
| Example 14 | 6.3 | 0.3 | 0.03 | 29 |
| Example 15 | 6.3 | 0.1 | 0.17 | 30 |
| Example 16 | 6.3 | 0.1 | 0.25 | 31 |
| Example 17 | 6.3 | 0.1 | 0.09 | 33 |
Examples 18 to 30
Examples 18 to 30 differ from example 1 in that the final aluminum foil pass reduction and the final aluminum foil pass take-up tension are different. See table 2 for specific values.
Table 2 summary of aluminum foil calendering process conditions and aluminum foil surface contact angles in examples 18 to 30
Example 31
The preparation method of the aluminum foil uses aluminum foil rolling mill rolling oil in the aluminum foil rolling process, and the aluminum foil rolling mill rolling oil is the same as that of the embodiment 1, wherein the rolling process before non-optimization is adopted:
the specific process comprises the following steps: the reduction of the aluminum foil final finished product during pass rolling is 28%;
the coiling tension of the final finished product pass of the aluminum foil is 65N/mm 2 ；
The aluminum foil is 8011 in national standard.
The thickness of the oil film layer on the surface of the finally obtained aluminum foil product is 200nm.
The aluminum foil surface contact angle produced in this example was 35 °.
Comparative examples 1 to 7
Comparative examples 1 to 7 differ from example 1 in that the mass percentage of the esters, the mass percentage of the alcohols and the acid value in the rolling oil were different. See table 3 for specific values.
Table 3 summary of Rolling oil parameters in comparative examples 1 to 7
As can be seen from the combination of comparative examples 1 to 2 and table 3, the lower mass percentage of the ester in the rolling oil of comparative example 1 resulted in a surface contact angle of the aluminum foil as high as 38 °, whereas the surface contact angle of the aluminum foil increased to 40 ° as the mass percentage of the ester in the rolling oil increased. As is clear from the comparative examples 3 to 4 and the table 3, the surface contact angle of the aluminum foil increases gradually as the mass percentage of the alcohol in the rolling oil increases. As can be seen from the combination of comparative examples 5 to 7 and the combination of table 3, the surface contact angle of the aluminum foil is as high as 42 ° due to the higher acid value in the rolling oil of comparative example 6 and the higher alcohol content in the rolling oil by mass percent; as can be seen from comparative examples 5 and 7, the surface contact angle of the aluminum foil increases gradually as the acid value in the rolling oil increases.
Performance test
Measurement of contact angle persistence
The aluminum foil products obtained in examples 1 to 8 and comparative examples 1 to 7 were slit into small rolls after the winding tension was set to 10Mpa or more, and the surface contact angle of the aluminum foil was measured at room temperature at 1 month intervals, and the measurement results were recorded, and the results are shown in tables 4 and 5.
Table 4 continuous measurement of contact angle of aluminum foil finished products obtained in examples 1 to 8
Table 5 continuous measurement of contact angle of aluminum foil finished products obtained in comparative examples 1 to 7
It can be seen from the combination of examples 1 to 8, comparative examples 1 to 7 and tables 4 and 5 that the application of the rolling oil of the present invention to the rolling process of aluminum foil can produce an effect over a long period of time with little or no change in the contact angle of the aluminum foil surface, and the rolling oil of the present invention has good persistence for the reduction of the contact angle of the aluminum foil surface.
It is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (6)
1. The preparation method of the aluminum foil is characterized by comprising the following steps of: rolling is carried out by adopting rolling oil of an aluminum foil rolling mill as follows,
the mass percentage of the ester in the rolling oil of the aluminum foil mill is 5.5-6.5%, the mass percentage of the alcohol in the rolling oil of the aluminum foil mill is 0.1-1%, the acid value is 0.03-0.25 mg KOH/g, the alcohol content and the acid value are reduced, the esterification reaction of the alcohol and the inorganic acid in the rolling oil of the aluminum foil mill is inhibited, the generation of the inorganic acid ester is reduced,
the coiling tension of the final aluminum foil finished product pass is 36-55N/mm 2 。
2. The method of producing an aluminum foil as claimed in claim 1, wherein: the mass percentage of the ester in the rolling oil is 5.8-6.3%, the mass percentage of the alcohol is 0.1-0.7%, and the acid value is 0.03-0.17 mg KOH/g.
3. The method of producing an aluminum foil according to claim 1, wherein: the reduction of the final finished aluminum foil pass rolling is 25% -38%.
4. A method of producing an aluminum foil according to claim 3, wherein: the reduction of the final finished aluminum foil pass rolling is 30% -35%.
5. The method of producing an aluminum foil according to claim 1, wherein: the coiling tension of the final aluminum foil finished product pass is 40-48N/mm 2 。
6. An aluminum foil product prepared by the method for preparing an aluminum foil according to any one of claims 1 to 5.
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| CN115302134B (en) * | 2022-03-17 | 2024-08-06 | 山东迈拓凯尔新材料科技有限公司 | Surface protection composition for aluminum foil for welding |
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