Non-coating titanium alloy non-stick pan and testing device

Abstract

The invention discloses an uncoated titanium alloy non-stick pan and a testing device. The uncoated titanium alloy non-stick pan comprises a micro-nano layer, a honeycomb structure layer and a microporous layer, the micro-nano structure layer is arranged on the alloy material layer, the honeycomb structure layer is of a concave honeycomb array structure processed on the micro-nano structure layer, and the micropore layer is arranged on the bottom surface of the honeycomb structure. The micro-nano layer is a micron-sized oil storage unit, so that an oil film is convenient to fix, and the integrity of the oil film can be kept even in a high-temperature cooking process, so that the oil film cannot be extruded by the gravity of food, and the direct contact between the food and the pan body is effectively avoided; the wear resistance can be improved through the honeycomb structure, meanwhile, grease is stored to form a secondary lubricating layer, and contact between food and the pot body is reduced; nanoscale pores of the microporous layer have an ultrahigh specific surface area, so that the contact area is reduced, the oil storage amount is increased, a compact oil film can be formed at micropores, a molecular-level isolation barrier can be constructed, and the non-sticky performance and the anti-charring capability can be enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of non-stick pans, and in particular to an uncoated titanium alloy non-stick pan and a testing device. Background Art

[0002] Cookware is one of the essential kitchen utensils in family life. With the improvement of people's quality of life, the requirements for the non-stick performance of cookware are gradually increasing, so different types of non-stick pans came into being.

[0003] To achieve the anti-stick effect of cookware, there are currently two main methods. One is to adhere a polytetrafluoroethylene coating to the surface of the pot, but polytetrafluoroethylene will decompose and produce fluorine-containing substances when heated for a long time, which is harmful to the human body. In addition, polytetrafluoroethylene will fall off during the cooking process. Long-term use will cause the microplastic content in the human body to exceed the standard, affecting health; the other is to use pure titanium coating, but the disadvantage is that it is expensive and fragile. After long-term use, the pure titanium coating will fall off and be damaged, losing its non-stick properties. Summary of the Invention

[0004] The present invention provides a non-stick pan made of titanium alloy without coating and a testing device to solve the above problems.

[0005] In order to achieve the above object, the technical solution of the present invention is:

[0006] In one aspect, the present invention provides an uncoated titanium alloy non-stick pan, comprising a micro-nano layer, a honeycomb structure layer, and a microporous layer;

[0007] The micro-nano structure layer is arranged on the alloy material layer, the honeycomb structure layer is a concave honeycomb array structure processed on the micro-nano structure layer, and the microporous layer is arranged on the bottom surface of the honeycomb structure.

[0008] Furthermore, the honeycomb array structure includes a groove and a protrusion arranged on the outer edge of the groove, the cross-section of the groove is a regular hexagon, the line connecting the opposite angles of the groove is ψ is 2 mm, the depth of the groove is H is 30 μm, and the width of the protrusion is W is 0.1 mm.

[0009] Furthermore, the microporous layer is a plurality of microporous structures uniformly arranged on the bottom surface of the honeycomb array structure, the pore diameter D of the microporous structure is 0.11 mm, the spacing S between adjacent microporous structures is 0.05 mm, and the pore depth h of the microporous structure is 18 μm.

[0010] Furthermore, the micro-nano layer is a micro-nano structure formed on the alloy material layer by nanosecond laser processing. The laser power of the nanosecond laser process is 15W, the wavelength is 1064nm, the frequency is 20kHz, the pulse width is 10-9s, the scanning speed is 500mm / s, the line spacing is 25μm, and the processing times is 1.

[0011] Furthermore, the alloy material layer is made of titanium alloy.

[0012] Another aspect of the present invention provides a device for testing the non-stick effect of the uncoated titanium alloy non-stick pan, the testing device comprising a lifting platform, a food fixing device, a pan heating device, a mechanical sensor, and a display device;

[0013] The bottom of the food fixing device can suspend food; the pot heating device is arranged on the lower side of the food fixing device, and is used to place and heat the uncoated titanium alloy non-stick pan; the lifting platform is arranged on one side of the food fixing device, and the lifting platform can drive the food to contact the uncoated titanium alloy non-stick pan; the top of the food fixing device is provided with a mechanical sensor for detecting the adhesion strength between the food and the uncoated titanium alloy non-stick pan; the mechanical sensor is electrically connected to the display device.

[0014] The beneficial effects of the present invention are:

[0015] The present invention discloses an uncoated titanium alloy non-stick pan, in which the micro-nano layer is a micron-scale oil storage unit. When grease penetrates into the pores of the micro-nano structure, an oil-locking cavity is formed due to surface tension, which is convenient for fixing the oil film. The integrity of the oil film can be maintained even during high-temperature cooking, so that the oil film cannot be squeezed out by the gravity of the food, effectively avoiding direct contact between the food and the pan body; the honeycomb structure can effectively prevent the microporous layer on the surface of the non-stick pan from being scratched by the outside, thereby improving the wear resistance of the bionic uncoated non-stick titanium pan. In addition, the honeycomb structure can also provide oil storage space, which can store grease and form a secondary lubricating layer to avoid direct contact between food and the pan body; the nano-scale pores of the microporous layer have an ultra-high specific surface area, which effectively reduces the contact area between the pan and the food, while increasing the oil storage capacity, greatly improving the oil storage capacity, forming a dense oil film at the micropores, constructing a molecular-level isolation barrier between the food and the pan body, further avoiding direct contact between the food and the pan body, making the adhesion between the pan and the food smaller, and significantly improving the non-stick performance and anti-scorching ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic structural diagram of an uncoated titanium alloy non-stick pan disclosed in Example 1 of the present invention;

[0018] Figure 2 for Figure 1 Enlarged view of part A;

[0019] Figure 3 The present invention discloses a device for testing the non-stick effect of an uncoated titanium alloy non-stick pan.

[0020] In the picture:

[0021] 1. Micro-nano layer; 2. Honeycomb structure layer; 21. Grooves; 22. Protrusions; 3. Microporous layer; 31. Microporous structure; 4. Alloy material layer; 5. Lifting platform; 6. Food fixing device; 7. Pot heating device; 8. Mechanical sensor; 9. Display device. DETAILED DESCRIPTION

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] Example

[0024] Example 1:

[0025] like Figure 1-2 The figure shows an uncoated titanium alloy non-stick pan disclosed in this embodiment, comprising a micro-nano layer 1, a honeycomb structure layer 2, and a microporous layer 3;

[0026] The micro-nano structure layer is provided on the alloy material layer 4 , the honeycomb structure layer 2 is a concave honeycomb array structure processed on the micro-nano structure layer, and the microporous layer 3 is provided on the bottom surface of the honeycomb structure.

[0027] The present invention discloses an uncoated titanium alloy non-stick pan, in which the micro-nano layer is a micron-scale oil storage unit. When grease penetrates into the pores of the micro-nano structure, an oil-locking cavity is formed due to surface tension, which is convenient for fixing the oil film. The integrity of the oil film can be maintained even during high-temperature cooking, so that the oil film cannot be squeezed out by the gravity of the food, effectively avoiding direct contact between the food and the pan body; the honeycomb structure can form an armor-like structure, which can effectively prevent the microporous layer on the surface of the non-stick pan from being scratched by the outside, thereby improving the wear resistance of the bionic uncoated non-stick titanium pan. In addition, the honeycomb structure can also provide oil storage space, which can store grease and form a "secondary lubrication layer" to avoid direct contact between food and the pan body; the nano-scale pores of the microporous layer have an ultra-high specific surface area, which effectively reduces the contact area between the pan and the food, while increasing the oil storage capacity, greatly improving the oil storage capacity, forming a dense oil film at the micropores, constructing a molecular-level isolation barrier between the food and the pan body, further avoiding direct contact between the food and the pan body, making the adhesion between the pan and the food smaller, and significantly improving the non-stick performance and anti-scorching ability.

[0028] In a specific embodiment, Figure 2 As shown, the honeycomb array structure includes a groove 21 and a protrusion 22 provided on the outer edge of the groove 21 (the surface of the protrusion is the micro-nanostructure layer 1), the cross-section of the groove 21 is a regular hexagon, the line connecting the opposite angles of the groove 21 is ψ, which is 2 mm, the depth of the groove 21 is H, which is 30 μm, and the width of the protrusion is W, which is 0.1 mm. The geometric coordination of the regular hexagonal groove 21 and the edge protrusion achieves dual performance optimization of mechanical protection and lubrication oil storage. Setting the size of the groove 21 and the size of the protrusion within this range will ensure the structural strength of the honeycomb array, and thus ensure its wear and scratch resistance. At the same time, the honeycomb array structure under this size can effectively store oil and ensure the stability of the secondary lubrication layer; if the size of the groove 21 is increased, the proportion of the protrusion width will be relatively reduced, resulting in a significant decrease in the strength of the honeycomb frame, and it will also cause uneven distribution of oil, and it is easy to form an "oil pool" in the center of the groove 21, while the edge area will cause food to stick due to insufficient oil; if the depth of the groove 21 is increased, the oil in the groove 21 needs to overcome greater capillary resistance, and the oil rising rate is reduced, resulting in increased adhesion between the food and the pot body, and at the same time, a cleaning dead corner will be formed, making it difficult to clean the pot body; if the depth of the groove 21 is reduced (equivalent to reducing the height of the protrusion), the scratch and wear resistance of the pot body will be greatly reduced, thereby reducing the service life of the non-stick pan.

[0029] In a specific embodiment, the microporous layer 3 is a plurality of microporous structures 31 uniformly arranged on the bottom surface of the honeycomb array structure (the bottom of the groove 21), the pore diameter D of the microporous structure 31 is 0.11 mm, the spacing S between adjacent microporous structures 31 is 0.05 mm, and the pore depth h of the microporous structure 31 is 18 μm; the micropores are designed to this size to form an optimal coupling with the surface tension of the oil, so that the oil forms a stable oil storage cavity in the micropores, which can effectively prevent the food from squeezing the oil out of the micropores, and the oil is adsorbed in the form of a molecular layer. The oil film is deposited on the pore wall and forms a denser oil film, which improves the oil's ability to resist high-temperature decomposition. The above-mentioned pore spacing and pore size are matched to make the micropores densely and evenly distributed. A continuous capillary network can be formed between adjacent micropores. The oil can diffuse rapidly through the capillary action of adjacent pores, thereby enhancing the overall oil storage and replenishment capacity of the microporous layer 3. During the cooking process, when the surface oil film is consumed, the oil in the micropores can actively migrate to the top surface of the micropores through capillary action, continuously replenishing the oil film (which can be regarded as self-repair of the oil film), ensuring continuous lubrication and maintaining non-stick performance.

[0030] If the pore size is reduced, the pores may be blocked by impurities in the grease (such as food crumbs) due to their small size, or the grease may have difficulty in infiltrating the micropore walls due to excessive surface energy, which in turn reduces the oil storage efficiency. On the contrary, if the pore size is increased, the surface tension of the oil is not enough to overcome the gravity of the liquid, and the grease is difficult to be "sucked" into the pores. The pores can only be filled by gravity, and the active oil storage capacity driven by capillary action is lost, and the oil storage efficiency will be significantly reduced. If the micropore spacing is increased, the synergistic effect of the capillary action between the micropores is weakened, and the continuity of the oil film is destroyed, which may result in no oil film coverage in some local areas, increasing the risk of food sticking. If the micropore depth is too shallow, it will lead to insufficient oil storage and the oil film will be easily consumed. If the micropores are too deep, the grease at the bottom of the pores will be difficult to quickly replenish to the surface through capillary action, affecting the timeliness of lubrication, thereby increasing the probability of food sticking to the pot body and reducing the non-stick effect of the pot body.

[0031] In a specific embodiment, the micro-nano layer 1 is a micro-nano structure formed on the alloy material layer 4 by nanosecond laser processing, and the laser power of the nanosecond laser process is 15W, the wavelength is 1064nm, the frequency is 20kHz, and the pulse width is 10 -9s, the scanning speed is 500mm / s, the line spacing is 25μm, and the processing times is 1; the microarray structure processed under these process parameters is crucial to the stability of the oil film formed on the surface. When oil enters the micropores in the formed microarray structure, an "oil locking cavity" will be formed due to the surface tension of the oil, which is convenient for fixing the oil film and ensuring that the integrity of the oil film can be maintained even during high-temperature cooking. In addition, the micro-nano structure forms a large number of micron-level pits, protrusions and columnar array nano-level pores through laser processing, forming a complex pore structure. After oil penetrates into these pores, it will be "stuck" in the pores, significantly resisting the probability of the oil film slipping or falling off due to external forces (such as stir-frying, gravity), thereby ensuring the stability of the oil film. That is, the micro-nano structure constructs a more stable oil film fixing system than ordinary surfaces through surface tension and mechanical locking.

[0032] In a specific embodiment, the alloy material layer 4 is made of titanium alloy. Titanium alloy has strong chemical stability, is resistant to corrosion by corrosive substances such as acid, alkali, and salt, and is not prone to chemical reactions with food, thus ensuring the original flavor and safety of the food.

[0033] When making this uncoated titanium alloy non-stick pan, the titanium alloy plate is first ultrasonically cleaned with deionized water and anhydrous ethanol to remove dust and oil stains on the surface of the titanium alloy plate; then, the titanium alloy plate is polished with 800-mesh and 2000-mesh sandpaper to remove the oxide layer on its surface; nanosecond laser processing is carried out in three steps, the first step is to construct a micro-nano layer on the entire titanium alloy surface, the second step is to construct a honeycomb structure layer (armor structure) on the titanium alloy surface, and the third step is to construct a microporous layer at the bottom of the honeycomb structure layer (laser power is 15W, scanning speed is 500mm / s, line spacing is 25μm, and processing times are 3 times); after the laser processing is completed, a nitrogen flow is used to blow away the metal particles remaining on the surface of the pan body to complete the production of the uncoated titanium alloy non-stick pan.

[0034] Example 2:

[0035] A device for testing the non-stick effect of the uncoated titanium alloy non-stick pan, the testing device comprising a lifting platform 5, a food fixing device 6, a pan heating device 7, a mechanical sensor 8, and a display device 9;

[0036] The bottom of the food fixing device 6 can suspend food 10; the pot heating device 7 is arranged on the lower side of the food fixing device, and is used to place and heat the uncoated titanium alloy non-stick pan; the lifting platform 5 is arranged on one side of the food fixing device 6, and the lifting platform 5 can drive the food 10 to contact the uncoated titanium alloy non-stick pan; the top 6 of the food fixing device is provided with the mechanical sensor 8 for detecting the adhesion strength between the food and the uncoated titanium alloy non-stick pan; the mechanical sensor 8 is electrically connected to the display device 9.

[0037] The food fixing device 6 includes a connecting plate 61 and a nylon rope 62 provided at the bottom of the connecting plate. A mechanical sensor 8 is connected to the top of the connecting plate 61, and the mechanical sensor 8 is connected to the lifting platform 5. The uncoated titanium alloy non-stick pan is fixed on the pot body heating device 7. When conducting the test, it is necessary to use the nylon rope 62 to pass through the food and suspend the food on the lower side of the connecting plate. Start the lifting platform 5, put an appropriate amount of cooking oil in the uncoated titanium alloy non-stick pan, drive the food to contact the uncoated titanium alloy non-stick pan, and heat the uncoated titanium alloy non-stick pan. The mechanical sensor measures the adhesion between the food and the uncoated titanium alloy non-stick pan and displays it on the display screen. After the test is over, the food is removed from the nylon rope and the nylon rope is driven to reset by the lifting platform to prepare for the next test.

[0038] Comparative Example:

[0039] Comparative Example 1:

[0040] Ordinary titanium alloy pot (without micro-nano layer, honeycomb structure layer and micro-nano structure layer).

[0041] Comparative Example 2:

[0042] The only difference between Comparative Example 1 and Example 1 is that in this comparative example, there is no honeycomb structure layer and micro-nano structure layer.

[0043] Comparative Example 3:

[0044] The only difference between Comparative Example 1 and Example 1 is that in this comparative example, the depth H of the grooves 21 of the honeycomb structure layer is 12 μm.

[0045] Comparative Example 4:

[0046] The only difference between Comparative Example 1 and Example 1 is that in this comparative example, the depth H of the grooves 21 of the honeycomb structure layer is 48 μm.

[0047] Comparative Example 5:

[0048] The only difference between Comparative Example 1 and Example 1 is that in this comparative example, the width W of the grooves 21 of the honeycomb structure layer is 0.05 mm.

[0049] Comparative Example 6:

[0050] The only difference between Comparative Example 1 and Example 1 is that in this comparative example, the width W of the grooves 21 of the honeycomb structure layer is 0.15 mm.

[0051] Comparative Example 7:

[0052] The only difference between Comparative Example 1 and Example 1 is that in this comparative example, the diameter of the micropores is 0.09 μm.

[0053] Comparative Example 8:

[0054] The only difference between Comparative Example 1 and Example 1 is that in this comparative example, the diameter of the micropores is 0.13 μm.

[0055] Comparative Example 9:

[0056] The only difference between Comparative Example 1 and Example 1 is that in this comparative example, the pore depth of the microporous structure is 18 μm.

[0057] Comparative Example 10:

[0058] The only difference between Comparative Example 1 and Example 1 is that in this comparative example, the pore depth of the microporous structure is 24 μm.

[0059] Comparative Example 11:

[0060] The only difference between Comparative Example 1 and Example 1 is that in this comparative example, the spacing S of the microporous structure is 0.03 mm.

[0061] Comparative Example 12:

[0062] The only difference between Comparative Example 1 and Example 1 is that, in this comparative example, the spacing S of the microporous structure is 0.07 mm.

[0063] The non-stick performance test was conducted on the non-stick pans of Example 1 and Comparative Examples 1-12 using the device of Example 2 (the pan was heated at 180°C for 20 seconds, the thickness of the oil film formed after adding edible oil was 10-75 μm, and the bottom area of the pork was 225 mm). 2 , pork weight 3.3g), and the adhesion strength after 200 friction was tested for Example 1 and Comparative Examples 2-3. The results are shown in Table 1 below;

[0064] Table 1 Adhesion strength test results of non-stick pans of Example 1 and Comparative Examples 1-12

[0065]

[0066] It can be seen from the results of the above embodiments and comparative examples that the adhesion strength of embodiment 1 is the lowest, that is, the sizes of the honeycomb structure layer and the microporous layer in embodiment 1 are optimal sizes, which can achieve the best non-stick performance; from the test results of the adhesion strength after 200 frictions of embodiment 1 and comparative examples 2-3, it can be seen that after the depth of the honeycomb structure layer in comparative example 3 is reduced, the wear and scratch resistance of the cookware is also reduced, so that the adhesion strength is significantly increased, and the non-stick performance is far inferior to the cookware with the depth of the honeycomb structure layer in embodiment 1; in comparative example 2, no honeycomb structure layer and nanostructure layer are provided (that is, only a microporous layer is provided), the wear and scratch resistance effect is reduced, and the non-stick effect is also reduced, but since the surface layer of the alloy material layer in comparative example 2 is a microporous array, the number of micropores per unit area is more than that of comparative example 3, so the non-stick effect of comparative example 2 is better than that of comparative example 3.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An uncoated titanium alloy non-stick pan, characterized in that: It comprises a micro-nano layer (1), a honeycomb structure layer (2) and a microporous layer (3); The micro-nano structure layer is arranged on the alloy material layer (4), the honeycomb structure layer (2) is a concave honeycomb array structure processed on the micro-nano structure layer, and the microporous layer (3) is arranged on the bottom surface of the honeycomb structure.

2. The uncoated titanium alloy non-stick pan according to claim 1, characterized in that: The honeycomb array structure comprises a groove (21) and a protrusion (22) arranged on the outer edge of the groove (21); the cross section of the groove (21) is a regular hexagon; the line connecting the opposite corners of the groove (21) is ψ, which is 2 mm; the depth H of the groove (21) is 30 μm; and the width W of the protrusion is 0.1 mm.

3. The uncoated titanium alloy non-stick pan according to claim 2, characterized in that: The microporous layer (3) is a plurality of microporous structures (31) uniformly arranged on the bottom surface of the honeycomb array structure, the pore diameter D of the microporous structure (31) is 0.11 mm, the spacing S between adjacent microporous structures (31) is 0.05 mm, and the pore depth h of the microporous structure (31) is 18 μm.

4. The uncoated titanium alloy non-stick pan according to claim 1, characterized in that: The micro-nano layer (1) is a micro-nano structure formed on the alloy material layer (4) by nanosecond laser processing, wherein the laser power of the nanosecond laser process is 15W, the wavelength is 1064nm, the frequency is 20kHz, and the pulse width is 10 -9 s, the scanning speed is 500 mm / s, the line spacing is 25 μm, and the number of processing times is 1.

5. The uncoated titanium alloy non-stick pan according to claim 1, characterized in that: The alloy material layer (4) is made of titanium alloy.

6. A device for testing the non-stick effect of the uncoated titanium alloy non-stick pan according to claim 1, characterized in that: The testing device comprises a lifting platform (5), a food fixing device (6), a pot heating device (7), a mechanical sensor (8) and a display device (9); The bottom of the food fixing device (6) is capable of suspending food (10); the pot body heating device (7) is arranged on the lower side of the food fixing device, and is used to place and heat the uncoated titanium alloy non-stick pan; the lifting platform (5) is arranged on one side of the food fixing device (6), and the lifting platform (5) is capable of driving the food (10) to contact the uncoated titanium alloy non-stick pan; the top of the food fixing device (6) is provided with the mechanical sensor (8) for detecting the adhesion strength between the food and the uncoated titanium alloy non-stick pan; the mechanical sensor (8) is electrically connected to the display device (9).

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