Lubricant for enhancing nano-friction power generation, preparation method thereof and effect detection device

Abstract

The present invention provides a lubricant for enhancing nano friction power generation, a preparation method thereof and an effect detection device, wherein the lubricant for enhancing nano friction power generation is composed of lubricating oil and TiO2. On the one hand, the lubricant can improve the output performance of the friction nano power generation device: by adding TiO2 nanoparticles, the oleic acid-based added lubricant can enhance the charge, voltage and current output of the friction nano power generation device. The presence of TiO2 nanoparticles improves the friction effect of the friction interface between PI and 304 stainless steel, enhances the electrochemical effect between PI and 304 stainless steel in the friction nano generator, thereby improving its charge generation and power conversion efficiency. On the other hand, it can effectively reduce the degree of wear of the friction nano power generation device material. Through filling and lubrication, TiO2 nanoparticles can reduce the direct contact between the friction surfaces between PI and 304 stainless steel, reduce friction resistance, thereby slowing down the wear rate of the material and extending the service life of the friction nano power generation device.

Description

Technical Field

[0001] The present invention relates to the technical field of nano friction power generation, and in particular to a lubricant for enhancing nano friction power generation, a preparation method thereof and an effect detection device. Background Art

[0002] There are a large number of marine platforms, marine ranches, engineering construction ships, and various underwater vehicles distributed in various sea areas, and a large number of sensors are deployed for monitoring ocean-related parameters, operating status and parameters of marine equipment. At present, the number of marine sensors is huge and widely distributed. Battery power supply will not only bring large installation and maintenance costs, but also cause environmental pollution. Liquid-solid friction nanogenerator (LS-TENG) has the advantages of simple structure, low cost, light weight, high efficiency, and high power density. It has the potential to collect wave energy from the ocean and can provide a new way for wave energy conversion. It has opened up a new path for self-powered technology that does not require external power supply. Using wave-driven friction nanogenerators to power marine sensors is expected to meet the energy needs of self-powered electronic devices on site.

[0003] TENG uses the friction between materials to generate an electrostatic field to achieve charge separation and electrical energy conversion. However, in practical applications, the performance of TENG is affected by many factors, including material selection, friction conditions, and surface lubrication. At present, some studies have shown that the performance of TENG can be improved by adding lubricants to the friction interface. For example, oleic acid is a commonly used lubricant that forms a uniform lubricating film at the friction interface, reducing friction resistance and thus improving the output performance of TENG. However, traditional oleic acid lubricants have problems such as short service life and unstable friction effect to a certain extent, which limits the further application of TENG. Therefore, it is necessary to propose an oleic acid-based lubricant for enhancing nano-friction power generation to solve the problems existing in the prior art and further improve the output performance of friction nano-power generation devices. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a lubricant for enhancing nano friction power generation, a preparation method thereof and an effect detection device to solve the problems existing in the prior art. The lubricant is designed to improve the electrical output performance between the 304 stainless steel and polyimide friction pairs, such as charge, voltage and current, while minimizing the wear between the 304 stainless steel and polyimide friction pairs and improving the wear resistance of the friction nano power generation device.

[0005] In order to achieve the above-mentioned object, the present invention provides a lubricant for enhancing nano-friction power generation, a preparation method thereof and an effect detection device, and the technical scheme adopted is as follows:

[0006] According to a first aspect of the present invention, a lubricant for enhancing nano friction power generation is provided, wherein the lubricant is composed of lubricating oil and TiO 2 composition.

[0007] The lubricant is used to enhance the wear resistance and electrical output effect between 304 stainless steel and polyimide in the nano friction generator.

[0008] Furthermore, the lubricating oil is oleic acid.

[0009] Furthermore, the lubricant is composed of lubricating oil and TiO 2 Particle composition.

[0010] Furthermore, the TiO 2 The size of the particles ranges from 20 nm to 40 nm.

[0011] Furthermore, the TiO 2 The mass fraction is 0.1%.

[0012] According to a second aspect of the present invention, a method for preparing the lubricant for enhancing nano-friction power generation as described above is provided, wherein the method comprises:

[0013] Under set temperature conditions, the lubricating oil and TiO 2 After mixing, ultrasonic oscillation is performed to obtain a mixed solution;

[0014] The mixed solution was centrifuged to separate the TiO 2 The particles are uniformly distributed in lubricating oil to prepare the lubricant.

[0015] Furthermore, the set temperature condition is 20-30°C.

[0016] Furthermore, the mixed solution is centrifuged at a rotation speed of 1800 to 2200 rpm for 8 to 12 minutes.

[0017] According to a third aspect of the present invention, there is provided an effect detection device for a lubricant used for enhancing nano-friction power generation as described above, the effect detection device comprising a fixture, stainless steel, a polyimide film, a base, a force sensor, an electrometer, a feeding assembly and a data terminal, the fixture fixing the stainless steel, the polyimide film being arranged on the base, the force sensor being mounted on the fixture, the feeding assembly being used to add the lubricant between the stainless steel and the polyimide film, the electrometer being connected to the stainless steel via a wire, the fixture being fixed on a friction and wear testing machine, and the data terminal being signal-connected to both the force sensor and the electrometer.

[0018] Furthermore, the data terminal is configured as follows:

[0019] Obtaining data collected by the force sensor and calculating the friction coefficient;

[0020] The electrical quantity data collected by the electrometer is obtained and electrical performance output data is calculated, wherein the electrical performance output data includes voltage data, current data and charge data.

[0021] The present invention has at least the following beneficial effects:

[0022] 1. The present invention can obtain the final product through two mixing steps, without the need for harsh reaction conditions of high temperature and high pressure, strong acid and strong base, and heavy metal catalysts, and can be reused later; the preparation process of the oleic acid-based additive lubricant is simple, highly operable, and has good stability and controllability.

[0023] 2. The reactants are only oleic acid and TiO 2 The product components are pure, excellent in performance, and easy to store for a long time. Through precise formula design and optimized preparation process, high-quality and consistent lubricant products can be obtained to ensure the stability and performance of triboelectric nano-power generation devices.

[0024] 3. The present invention can improve the output performance of triboelectric nano-power generation devices: by adding TiO 2 Nanoparticles, oleic acid-based lubricants can enhance the charge, voltage and current output of triboelectric nanogenerators. The presence of TiO2 nanoparticles improves the friction effect of the friction interface between PI and 304 stainless steel, and enhances the electrochemical effect between PI and 304 stainless steel in the triboelectric nanogenerator, thereby improving its charge generation and electrical energy conversion efficiency.

[0025] 4. The present invention can reduce the wear of materials: the addition of oleic acid-based lubricants can effectively reduce the wear of friction nano-power generation device materials. Through filling and lubrication, TiO 2 Nanoparticles can reduce the direct contact between the friction surfaces of PI and 304 stainless steel, reduce friction resistance, thereby slowing down the wear rate of the material and extending the service life of the friction nanopower generation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0027] Figure 1A schematic structural diagram of a device for detecting the effect of a lubricant for enhancing nano-friction power generation according to an embodiment of the present invention is shown.

[0028] Figure 2 A comparison diagram of the voltage effect of the lubricant according to an embodiment of the present invention, dry friction, and pure oleic acid lubrication is shown.

[0029] Figure 3 A comparison diagram of the current effect of the lubricant according to an embodiment of the present invention, dry friction, and pure oleic acid lubrication is shown.

[0030] Figure 4 A comparison diagram of the charge effect of the lubricant according to an embodiment of the present invention with dry friction and pure oleic acid lubrication is shown.

[0031] Figure 5 A comparison of the friction coefficients of the lubricant according to an embodiment of the present invention, dry friction, and pure oleic acid lubrication is shown.

[0032] In the figure, 1. fixture; 2. stainless steel; 3. polyimide film; 4. base; 5. force sensor; 6. electrometer; 7. feeding assembly; 8. data terminal; 9. lubricant; 10. wire. DETAILED DESCRIPTION

[0033] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0034] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] The specific implementation of the present invention is further described in detail below in conjunction with the drawings and examples.

[0037] The embodiment of the present invention provides a lubricant for enhancing nano friction power generation, the lubricant is composed of oleic acid and TiO 2 Nanoparticle composition, including TiO 2 The nanoparticles are evenly distributed in oleic acid. 2 Nanoparticles vary in size and shape, ranging from 20-40nm.

[0038] The present invention also provides a method for preparing the lubricant for enhancing nano-friction power generation, and the specific preparation steps are as follows:

[0039] Oleic acid is poured into a centrifuge tube, and TiO2 particles of different sizes, shapes and sizes but with a rough size of 20nm to 40nm are added. Ultrasonic vibration is performed for 30 minutes at 20-30℃ to mix the TiO2 particles that are aggregated in the oleic acid. 2 The particles were all broken up. Then the solution was placed in a centrifuge tube and mixed at 2000 rpm for 10 minutes to make the TiO 2 The particles are evenly distributed in oleic acid, and finally TiO 2 Oleic acid based lubricant.

[0040] The embodiment of the present invention also provides a device for detecting the effect of the lubricant used for enhancing nano friction power generation, such as Figure 1 As shown, the effect detection device includes a fixture 1, stainless steel 2, a polyimide film 3, a base 4, a force sensor 5, an electrometer 6, a feeding assembly 7 and a data terminal 8. The fixture 1 fixes the stainless steel 2, the polyimide film 3 is arranged on the base 4, the force sensor 5 is installed on the fixture 1, the feeding assembly 7 is used to add the lubricant 9 between the stainless steel 2 and the polyimide film 3, the electrometer 6 is connected to the stainless steel 2 through a wire 10, the fixture 1 is fixed on a friction and wear testing machine (not shown in the figure), and the data terminal 8 is signal-connected to the force sensor 5 and the electrometer 6.

[0041] For example, the base 4 in this embodiment can be a quartz plate, the fixture is made of polyetheretherketone (Peek), the stainless steel 2 is 304 stainless steel, the feeding component 7 is a rubber-tipped dropper, the data terminal 8 is a computer, the stainless steel 2 can be fixed to the lower end of the fixture 1 through a wire 10, and the stainless steel 2 can form a simple nano friction generator by contacting the polyimide film 3. The electrometer 6 can select a Keithley 6514 electrometer, collect data through a data acquisition card, and transmit it to a computer.

[0042] Based on the effect detection device described above, the TiO prepared by the preparation method described above 2 To test the effect of oleic acid-based lubricants, a Keithley 6514 electrometer, a rotary reciprocating friction and wear tester, several wires, a peek fixture, a PI film, and a 304 stainless steel ball are required. The friction pair of the friction nanogenerator is polyimide (PI) and 304 stainless steel. The Keithley 6514 electrometer is used to detect the change in electrical output performance, and the rotary reciprocating friction and wear tester is used to detect the change in the friction coefficient of the nano friction generator. The effect detection is achieved through the following steps:

[0043] The 304 stainless steel material clamped in the peek fixture is connected by wires. The fixture is fixed on the friction and wear tester. The friction sensor on the fixture fixing table transmits data to the computer to complete the calculation of the friction coefficient. The fixture wire is also connected to the Keithley 6514 electrometer. The data is collected through the data acquisition card and transmitted to the computer. The 304 stainless steel and polyimide film are subjected to continuous reciprocating friction motion, and the electrical signal and friction coefficient are recorded at the same time. Through dry friction, pure oleic acid lubrication, mass fraction of 0.1% TiO 2 The experimental effect can be clearly seen by comparing the data obtained under three different friction conditions of oleic acid lubrication.

[0044] In terms of data processing, the friction coefficient data of 304 stainless steel and polyimide nano-friction generators were collected by friction and wear testing machine, and a friction coefficient comparison chart was drawn. The comparison data showed that compared with dry friction, the lubricant can improve the wear resistance between 304 stainless steel and polyimide. The electrical output performance data of 304 stainless steel and polyimide nano-friction generators were collected by Keithley 6514 electrometer, and a voltage, current and charge data comparison chart was drawn. The comparison data showed that compared with dry friction, the lubricant can improve the electrical output between 304 stainless steel and polyimide.

[0045] In this example, the invention is designed to contain 0.1wt% TiO 2The oleic acid lubricant was compared with dry friction (i.e. no lubricant) and lubrication with oleic acid. The final results are as follows Figures 2 to 5 shown. Figure 2 It is a comparison diagram of the voltage effect of the lubricant of the present invention, dry friction and pure oleic acid lubrication. When the content of TiO2 is 0.1wt% as oleic acid additive, the voltage amplitude reaches the maximum. Figure 3 It is a comparison diagram of the current effect of the lubricant of the present invention, dry friction and pure oleic acid lubrication. When the content of TiO2 is 0.1wt% as oleic acid additive, the current amplitude reaches the maximum. Figure 4 It is a comparison diagram of the charge effect of the lubricant of the present invention, dry friction and pure oleic acid lubrication. When the content of TiO2 is 0.1wt% as oleic acid additive, the charge amplitude reaches the maximum. Figure 5 This is a comparison chart of the friction coefficients of the lubricant of the present invention, dry friction and pure oleic acid lubrication. When the content of 0.1wt% TiO2 is used as an oleic acid additive, the friction coefficient increases and is smaller than that of dry friction. Figures 2 to 5 It can be found that the 0.1wt% TiO 2 Oleic acid lubricant not only ensures the stability and performance of the friction nanopower generation device, but also improves the output performance of the friction nanopower generation device, while also reducing material wear.

[0046] The above implementation modes are only used to illustrate the present invention, but not to limit the present invention. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also belong to the scope of the present invention. The patent protection scope of the present invention should be defined by the claims.

Claims

1. A lubricant for enhancing nano-friction power generation, characterized in that: The lubricant is composed of lubricating oil and TiO2; the lubricating oil is oleic acid; the lubricant is composed of lubricating oil and TiO2 particles of different particles, shapes and sizes; the size range of the TiO2 particles is 20nm to 40nm; the mass fraction of TiO2 is 0.1%; The lubricant for enhancing nano friction power generation is prepared by the following method: TiO2 particles of different shapes and sizes but with a size of 20nm to 40nm are mixed with oleic acid, and ultrasonic oscillation is performed under set temperature conditions to break up all the agglomerated TiO2 particles mixed in the oleic acid. The solution is then placed in a centrifuge tube and rotated and mixed using a rotary mixer to evenly distribute the TiO2 particles in the oleic acid, thereby obtaining the lubricant for enhancing nano-friction power generation.

2. The lubricant for enhancing nano-friction power generation according to claim 1, characterized in that: The set temperature condition is 20-30°C.

3. The lubricant for enhancing nano-friction power generation according to claim 1, characterized in that: The method comprises: performing rotation mixing by a rotary mixer, comprising: performing rotation mixing on the solution in the centrifuge tube for 8 to 12 minutes at a rotation speed of 1800 to 2200 rpm by the rotary mixer.

4. A synergistic nano friction generator using the lubricant according to any one of claims 1 to 3, characterized in that: The synergistic nano-friction generator includes a fixture, stainless steel, a polyimide film, a base, a force sensor, an electrometer, a feeding assembly and a data terminal. The fixture fixes the stainless steel, the polyimide film is arranged on the base, the force sensor is installed on the fixture, the feeding assembly is used to add the lubricant between the stainless steel and the polyimide film, the electrometer is connected to the stainless steel through a wire, the fixture is fixed on a friction and wear testing machine, and the data terminal is signal-connected to the force sensor and the electrometer.

5. The synergistic nano-friction generator according to claim 4, characterized in that: The data terminal is configured as follows: Obtaining data collected by the force sensor and calculating the friction coefficient; The electrical quantity data collected by the electrometer is obtained and electrical performance output data is calculated, wherein the electrical performance output data includes voltage data, current data and charge data.

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