A micro-nano robot with sensing function and preparation method thereof

Abstract

The present invention relates to the technical field of micro-nano robot preparation, and specifically to a micro-nano robot with sensing functions and a preparation method thereof. The preparation method comprises: step 1: adding copper sulfate pentahydrate particles to a resin, stirring, then adding a silane coupling agent, and stirring evenly to obtain an inner phase solution for preparing the micro-nano robot; step 2: adding polyvinyl pyrrolidone and sodium lauryl sulfate to deionized water, stirring evenly, to obtain an outer phase solution for preparing the micro-nano robot; step 3: utilizing microfluidic droplet forming technology, utilizing the solutions obtained in steps 1 and 2 as the inner and outer phases, respectively, adjusting the flow rates of the inner and outer phases, controlling the size of the droplets after forming, and curing with an ultraviolet lamp to obtain micro-nano robot substrate microspheres with a core-shell structure; and step 4: placing the micro-nano robot substrate microspheres obtained in step 3 into a magnetron sputtering instrument, and nickel-plating them under vacuum to obtain a micro-nano robot with sensing functions.

Description

Technical Field

[0001] The present invention relates to the technical field of micro-nano robot preparation, and in particular to a micro-nano robot with a sensing function and a preparation method thereof. Background Art

[0002] In recent years, artificially synthesized micro-nano robots have shown great potential in fields such as the environment, biomedicine, and microengineering. A micro-nano robot, also known as a micro-nano motor, is a power device between the nanometer and micrometer scales. It can convert ultrasonic energy, light energy, electrical energy, magnetic energy, thermal energy, chemical energy, and other energies in the external environment into mechanical energy, thereby achieving specific movements of the individual. Compared with other functional devices with sensing functions, micro-nano robots can move in a small micro-nano space and can sense the state of the environment in which they are located. However, the sensing function of existing micro-nano robots is mainly used in the biomedical field. In terms of temperature sensing, most micro-nano robots are modified and designed with organic materials. Their sensing range is small and the sensing temperature is low, which is not conducive to application in the field of microengineering. In view of this, it is of great significance to provide a micro-nano robot with sensing function for use in the field of microengineering. Summary of the Invention

[0003] In order to solve the above technical problems, the purpose of the present invention is to provide a micro-nano robot with sensing function and a preparation method thereof, so as to solve the problems of small sensing application range and low sensing temperature of existing micro-nano robots.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] A method for preparing a micro-nano robot with sensing function comprises the following steps:

[0006] Step 1: Add copper sulfate pentahydrate particles to the resin, stir, then add a silane coupling agent, and stir evenly to obtain an internal phase solution for preparing the micro-nano robot;

[0007] Step 2: Add polyvinyl pyrrolidone and sodium lauryl sulfate into deionized water and stir evenly to obtain an external phase solution for preparing the micro-nano robot;

[0008] Step 3: Using microfluidic droplet forming technology, the solutions obtained in steps 1 and 2 are used as the inner and outer phases, respectively. The flow rates of the inner and outer phases are adjusted to control the size of the droplets after formation. The droplets are then cured using an ultraviolet lamp to obtain micro-nanorobotic substrate microspheres with a core-shell structure.

[0009] Step 4: Place the micro-nano robot substrate microspheres obtained in step 3 into a magnetron sputtering instrument, and nickel-plate them under vacuum to obtain a micro-nano robot with sensing function.

[0010] In the step 1, the copper sulfate pentahydrate particles are ground using a ball mill for 12 hours until the particle size is 2 μm.

[0011] In the step 1, the resin is a high-temperature resistant transparent light-curing resin, and its high-temperature resistance is 250°C.

[0012] In the step 1, the silane coupling agent is KH550, which is a colorless liquid.

[0013] In the step 1, the mass ratio of the copper sulfate pentahydrate particles, the resin, and the silane coupling agent is 0.5:1:0.1.

[0014] In the step 1, all processes involving the resin are carried out at room temperature and in the dark.

[0015] In the step 2, the mass ratio of polyvinyl pyrrolidone, sodium lauryl sulfate and deionized water is 0.01:0.02:0.47.

[0016] In the step three, the flow rates of the internal and external phases are controlled so that the size of the micro-nano robot substrate microspheres with a core-shell structure is 80 μm.

[0017] In the step 4, the thickness of the magnetron sputtering nickel plating is controlled to be 200 nm.

[0018] A method for preparing a micro-nano robot with a sensing function. The prepared micro-nano robot with a sensing function comprises a mixed portion of copper sulfate pentahydrate particles and a silane coupling agent, a resin, and a nickel layer. The resin is arranged on the outside of the mixed portion of copper sulfate pentahydrate particles and the silane coupling agent, and the nickel layer is arranged on the outside of the resin.

[0019] The present invention has the following beneficial effects:

[0020] 1. This invention utilizes the principle of mutual immiscibility between the internal and external solutions in microfluidics technology to control the flow rates of the internal and external phases to produce microspheres that form the micro-nanorobot substrate, resulting in relatively uniform size. These microspheres are cured under ultraviolet light, making the formation quick and convenient.

[0021] 2. This invention utilizes a complex component primarily composed of basic copper sulfate, produced by the reaction of copper sulfate pentahydrate with a silane coupling agent. By utilizing the principle that the color changes as the temperature rises, it can sense temperatures between 100°C and 250°C. The micro-nano robot of this invention possesses both magnetic drive and sensing capabilities, enabling it to sense temperatures within micropores and microstructures over a wide range and at high temperatures.

[0022] 3. The micro-nano robot obtained by the present invention is irreversible after sensing the temperature. Copper sulfate pentahydrate reacts with the silane coupling agent to generate a complex component mainly composed of basic copper sulfate. This chemical reaction is irreversible, so that recovery and detection can be carried out after sensing, and it is not distorted to a certain extent, ensuring that the most realistic ambient temperature is sensed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0024] Figure 1 Schematic diagram of the micro-nano robot structure in Example 1;

[0025] Figure 2 is the temperature curve sensed by the micro-nano robot in Example 1;

[0026] Figure 3 is the difference curve of the micro-nano robot after cooling in Example 1;

[0027] In the figure: a mixture of copper sulfate pentahydrate particles and a silane coupling agent 1; a resin 2; and a nickel layer 3. DETAILED DESCRIPTION

[0028] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples are only used to explain the present invention and are not intended to limit the scope of the invention. In the embodiments, if specific conditions are not specified, they are carried out according to conventional conditions or conditions recommended by the manufacturer. If the manufacturer of the reagents or instruments is not specified, they are all conventional products that can be purchased commercially.

[0029] Example 1: A micro-nano robot with sensing function, the preparation method of which comprises the following steps:

[0030] Step 1: Grind copper sulfate pentahydrate particles using a ball mill for 12 hours to a particle size of 2 μm. Then, at room temperature and in the dark, mix the copper sulfate pentahydrate particles, a high-temperature resistant transparent light-curable resin, and a silane coupling agent KH550 in a mass ratio of 0.5:1:0.1 to obtain an inner phase solution.

[0031] Step 2: Prepare the external phase solution by mixing polyvinyl pyrrolidone, sodium lauryl sulfate, and deionized water in a mass ratio of 0.01:0.02:0.47;

[0032] Step 3: Using microfluidic droplet forming technology, the solutions obtained in steps 1 and 2 are used as the inner and outer phases, respectively. The flow rates of the inner and outer phases are adjusted to control the size of the droplets after formation. The droplets are then cured using an ultraviolet lamp to obtain micro-nanorobotic substrate microspheres with a core-shell structure, with a size of 80 μm.

[0033] Step 4: Place the micro-nano robot base microspheres obtained in step 3 into a magnetron sputtering instrument, and nickel-plate them under vacuum conditions to make the nickel layer thickness reach 200 nm, thereby obtaining a micro-nano robot with sensing function.

[0034] like Figure 1 As shown, the micro-nano robot with sensing capabilities includes a mixture of copper sulfate pentahydrate particles and a silane coupling agent, a resin, and a nickel layer. The resin is disposed on the outside of the mixture, and the nickel layer is disposed on the outside of the resin. The robot senses temperatures between 100°C and 250°C by utilizing the principle that the color changes as the temperature rises, which is derived from the reaction between copper sulfate pentahydrate and the silane coupling agent, to produce a main component, basic copper sulfate.

[0035] The mixed part 1 of copper sulfate pentahydrate particles and silane coupling agent is the core of the micro-nano robot's sensing function. After the copper sulfate pentahydrate reacts with the silane coupling agent, a complex component with basic copper sulfate as the main body is obtained. As the temperature rises, the basic copper sulfate component gradually increases and the color value changes; the function of resin 2 is to provide a high-temperature resistant carrier; the function of nickel layer 3 is to make the micro-nano robot magnetic, which is convenient for driving and controlling the micro-nano robot.

[0036] like Figure 2 and 3 As shown in the figure, a least-squares exponential fit is performed on the points depicted on the micro-nano robot's temperature perception curve, resulting in the fitted curve (dashed line). This allows the micro-nano robot to subsequently sense temperature by detecting the color value of a high-temperature area after passing through it, and then inferring the temperature of that area based on the color value using the fitted curve. The difference curve after the micro-nano robot cools down shows that the color value changes little after cooling, verifying that the micro-nano robot's temperature perception process is irreversible, facilitating subsequent testing.

Claims

1. A method for preparing a micro-nano robot with sensing function, characterized in that: The following steps are involved: Step 1: Add copper sulfate pentahydrate particles to the resin, stir, then add a silane coupling agent, and stir evenly to obtain an internal phase solution for preparing the micro-nano robot; Step 2: Add polyvinyl pyrrolidone and sodium lauryl sulfate into deionized water and stir evenly to obtain an external phase solution for preparing the micro-nano robot; Step 3: Using microfluidic droplet forming technology, the solutions obtained in steps 1 and 2 are used as the inner and outer phases, respectively. The flow rates of the inner and outer phases are adjusted to control the size of the droplets after formation. The droplets are then cured using an ultraviolet lamp to obtain micro-nanorobotic substrate microspheres with a core-shell structure. Step 4: Place the micro-nano robot substrate microspheres obtained in step 3 into a magnetron sputtering instrument, and nickel-plate them under vacuum to obtain a micro-nano robot with sensing function.

2. The method for preparing a micro-nano robot with sensing function according to claim 1, characterized in that: In the step 1, the copper sulfate pentahydrate particles are ground using a ball mill for 12 hours until the particle size is 2 μm.

3. The method for preparing a micro-nano robot with sensing function according to claim 1, characterized in that: In the step 1, the resin is a high-temperature resistant transparent light-curing resin, and its high-temperature resistance is 250°C.

4. The method for preparing a micro-nano robot with sensing function according to claim 1, characterized in that: In the step 1, the silane coupling agent is KH550, which is a colorless liquid.

5. The method for preparing a micro-nano robot with sensing function according to claim 1, characterized in that: In the step 1, the mass ratio of the copper sulfate pentahydrate particles, the resin, and the silane coupling agent is 0.5:1:0.

1.

6. The method for preparing a micro-nano robot with sensing function according to claim 1, characterized in that: In the step 1, all processes involving the resin are carried out at room temperature and in the dark.

7. The method for preparing a micro-nano robot with sensing function according to claim 1, characterized in that: In the step 2, the mass ratio of polyvinyl pyrrolidone, sodium lauryl sulfate and deionized water is 0.01:0.02:0.

47.

8. The method for preparing a micro-nano robot with sensing function according to claim 1, characterized in that: In the step three, the flow rates of the internal and external phases are controlled so that the size of the micro-nano robot substrate microspheres with a core-shell structure is 80 μm.

9. The method for preparing a micro-nano robot with sensing function according to claim 1, characterized in that: In the step 4, the thickness of the magnetron sputtering nickel plating is controlled to be 200 nm.

10. The method for preparing a micro-nano robot with sensing function according to claim 1, wherein the prepared micro-nano robot with sensing function is characterized in that: The micro-nano robot with sensing function comprises a copper sulfate pentahydrate particle and silane coupling agent mixed portion (1), a resin (2) and a nickel layer (3); the resin (2) is arranged on the outer side of the copper sulfate pentahydrate particle and silane coupling agent mixed portion (1), and the nickel layer (3) is arranged on the outer side of the resin (2).

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