A biomimetic skin system

Abstract

The embodiment of the application discloses a kind of bionic skin systems, to simulate the appearance, touch and physiological function of real skin.The system includes light-transmitting silicone outer layer, super-soft silicone inner layer, microfluidic bionic vascular network, circulatory system and temperature simulation control device.Transmitting silicone outer layer provides realistic skin color and texture, and super-soft silicone inner layer simulates the softness and elasticity of skin.Microfluidic bionic vascular network is embedded in super-soft silicone inner layer, composed of micro-channels, connected to the circulatory system consisting of micro piezoelectric pump and liquid storage bag, can simulate blood flow, enhance the dynamic physiological characteristics of skin, and the temperature control device further improves the fidelity of bionic skin.The application realizes the high personification of bionic skin in appearance, touch and physiological function through multi-layer structure design, so that it has wide application potential in medical, cosmetic and human-computer interaction fields.

Description

Technical Field

[0001] This utility model relates to the field of biomimetic materials technology, and in particular to a biomimetic skin system. Background Technology

[0002] With the rapid development of fields such as medical aesthetics, robotics, and human-computer interaction, the demand for bionic skin with highly realistic characteristics is increasing. Traditional bionic skin materials mainly focus on appearance simulation and cannot simultaneously meet the multiple requirements of visual realism, tactile realism, and physiological function simulation.

[0003] Currently, bionic skin products on the market have the following technical limitations: First, in terms of material properties, most products use a single silicone material, which cannot simultaneously achieve a balance between light transmittance and softness, resulting in a significant difference in appearance and feel compared to real skin. Second, in terms of functional simulation, existing technologies lack effective physiological function simulation mechanisms, especially in achieving dynamic simulation of key physiological characteristics such as blood circulation and temperature regulation.

[0004] Therefore, there is an urgent need to develop a new type of bionic skin system that can overcome the limitations of existing technologies and achieve full-scale simulation of appearance, touch and physiological function, so as to meet the urgent needs of medical aesthetics, robotics and human-computer interaction for highly realistic bionic skin. Utility Model Content

[0005] This application addresses the shortcomings of existing bionic skin systems, such as limited functionality, poor structural integration, and insufficient dynamic response. It proposes an innovative bionic skin system that utilizes a multi-layered composite structure design—comprising a translucent silicone outer layer, an ultra-soft silicone inner layer, and an embedded microfluidic vascular network—along with a micro-piezoelectric pump circulation system and an intelligent temperature control device. This achieves comprehensive simulation of appearance, feel, and physiological function, effectively solving the technical challenges of traditional bionic skin in terms of multifunctionality, structural stability, and dynamic response. The technical solution provided in this application is as follows: On one hand, this application provides a bionic skin system, comprising: Translucent silicone outer layer: Located on the outermost layer, used to simulate the appearance of skin; Ultra-soft silicone inner layer: adheres to the inner side of the light-transmitting silicone outer layer and is composite with the light-transmitting silicone outer layer to form an anthropomorphic skin structure; Microfluidic biomimetic vascular network: Embedded in the inner layer of the ultra-soft silicone, it consists of a series of microchannels; Circulatory system: includes a micro piezoelectric pump and a reservoir, wherein the micro piezoelectric pump is connected to the microfluidic biomimetic vascular network, and the reservoir is used to store liquid; A temperature simulation and control device is used to regulate the temperature of the bionic skin.

[0006] In some specific embodiments, the inner wall of the channel of the microfluidic biomimetic vascular network is coated with a magnetron sputtered TiO2 / SiO2 multilayer film for controlling the optical color development of blood vessels.

[0007] In some specific embodiments, the translucent silicone outer layer has a layered dyeing structure inside, the layered dyeing structure including a flesh-colored silicone ink sprayed at the bottom layer and a red dye injected in the middle layer to simulate capillaries; The outer surface of the translucent silicone outer layer has a skin texture formed by nanoimprinting, with a surface roughness Ra of 20-50μm and a light transmittance of 85%-90%.

[0008] In some specific embodiments, a flexible LED array is embedded in the ultra-soft silicone inner layer, wherein the spacing between the LEDs is 2-8mm and the thickness is 0.1-0.3mm.

[0009] In some specific embodiments, the temperature simulation and control device includes a graphene heating film and a semiconductor cooling chip. The graphene heating film is embedded between the light-transmitting silicone outer layer and the ultra-soft silicone inner layer, and the semiconductor cooling chip is fixed to the base side of the ultra-soft silicone inner layer. In some specific embodiments, the diameter of the channel is 50-300 μm, and the channel is filled with thermosensitive PNIPAM hydrogel.

[0010] In some specific embodiments, the flow rate accuracy of the micro piezoelectric pump is ±0.1 ml / min.

[0011] In some specific implementations, a biomimetic thermal radiation system is also included to simulate the thermal radiation characteristics of the human body; The biomimetic thermal radiation system includes a graphene / PEDOT:PSS composite electrothermal film, phase change material microcapsules, and an infrared radiation modulation layer. The graphene / PEDOT:PSS composite electrothermal film is disposed inside the translucent silicone outer layer and is in contact with the infrared radiation modulation layer. The phase change material microcapsules are uniformly dispersed in the ultra-soft silicone inner layer and are thermally coupled to the graphene / PEDOT:PSS composite electrothermal film. The infrared modulation layer is bonded to the translucent silicone outer layer using optical adhesive.

[0012] In some specific embodiments, the translucent silicone outer layer and the ultra-soft silicone inner layer are bonded and composited by plasma treatment; wherein, the plasma treatment parameters include: radio frequency power of 90-110W and working gas of Ar / O2 mixed gas.

[0013] In some specific embodiments, the surface of the light-transmitting silicone outer layer is coated with a fluorosilane hydrophobic coating.

[0014] By adopting the above technical solution, the bionic skin system provided in this application has the following beneficial effects: This application discloses a biomimetic skin system designed to simulate the appearance, feel, and physiological functions of real skin. The system includes a translucent silicone outer layer, an ultra-soft silicone inner layer, a microfluidic biomimetic vascular network, a circulatory system, and a temperature simulation and control device. The translucent silicone outer layer provides realistic skin color and texture, while the ultra-soft silicone inner layer simulates the softness and elasticity of skin. The microfluidic biomimetic vascular network, embedded in the ultra-soft silicone inner layer and composed of microchannels, is connected to a circulatory system consisting of a micro-piezoelectric pump and a reservoir, simulating blood flow and enhancing the dynamic physiological characteristics of the skin. The temperature control device further improves the realism of the biomimetic skin. Through its multi-layered structural design, this application achieves a high degree of anthropomorphism in the appearance, feel, and physiological functions of the biomimetic skin, making it widely applicable in the medical, cosmetic, and human-computer interaction fields. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A schematic diagram of the structure of the bionic skin system provided in the embodiments of this application. Figure 1 ; Figure 2 A schematic diagram of the structure of the bionic skin system provided in the embodiments of this application. Figure 2 .

[0017] The following is supplementary explanation of the attached figures: 10-Transparent silicone outer layer; 20-Ultra-soft silicone inner layer; 30-Microfluidic biomimetic vascular network; 40-Circulatory system; 50-Temperature simulation and control device. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0019] For the terms defined below, unless a different definition is given elsewhere in the claims or this specification, these definitions shall apply. All numerical values, whether explicitly indicated or not, are defined herein as being modified by the term "about." The term "about" generally refers to a range of numerical values ​​that a person skilled in the art would consider equivalent to the stated values ​​to produce substantially the same properties, functions, results, etc. A range of numerical values ​​indicated by a low value and a high value is defined as including all numerical values ​​included within that range and all subranges included within that range.

[0020] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0022] Please see Figure 1 and Figure 2 This application provides a bionic skin system, comprising: Translucent silicone outer layer 10: Located on the outermost layer, used to simulate the appearance of skin; Ultra-soft silicone inner layer 20: It is attached to the inner side of the light-transmitting silicone outer layer 10 and forms a humanoid skin structure with the light-transmitting silicone outer layer 10. Microfluidic biomimetic vascular network 30: Embedded in the ultra-soft silicone inner layer 20, it consists of a series of microchannels; Circulatory system 40: includes a micro piezoelectric pump and a reservoir. The micro piezoelectric pump is connected to a microfluidic biomimetic vascular network 30, and the reservoir is used to store liquid. Temperature simulation control device 50 is used to regulate the temperature of the bionic skin.

[0023] Specifically, the translucent silicone outer layer 10, as the outermost layer of the biomimetic skin system, is in direct contact with the outside world. Its core function is to simulate the appearance characteristics of real skin, including skin tone, texture, and luster. This outer layer is made of medical-grade transparent silicone material, which has high light transmittance, allowing light to pass through and thus achieving a visual effect close to real skin. The material has good biocompatibility and weather resistance, while maintaining softness and elasticity, and can simulate the natural curvature and stretching of skin. In addition, the translucent silicone outer layer 10 also has wear-resistant, UV-resistant, and anti-aging properties, ensuring a stable and aesthetically pleasing appearance over long-term use. The surface of the outer layer is finely processed to form a micron-level textured structure, simulating the pores and fine lines of real skin. This not only enhances visual realism but also scatters light, reduces reflection, and makes the skin appearance more natural.

[0024] An ultra-soft silicone inner layer 20 is bonded to the inside of the translucent silicone outer layer 10, forming a humanoid skin structure. Its main function is to provide softness and elasticity similar to human skin, enhancing the tactile realism of the bionic skin. The ultra-soft silicone inner layer 20 is made of ultra-soft silicone material, possessing extremely high softness and elasticity, capable of simulating the feel of real skin. This material has good biocompatibility and chemical stability, ensuring that it will not cause harm to the human body during long-term use. Furthermore, the ultra-soft silicone inner layer 20 also has a certain degree of breathability, helping to simulate the skin's breathing function.

[0025] A microfluidic biomimetic vascular network 30, embedded within an ultra-soft silicone inner layer 20, consists of a series of microchannels designed to simulate capillaries in real skin. Its primary function is to deliver simulated blood or other fluids, mimicking blood circulation. This network is made from biocompatible materials such as polydimethylsiloxane (PDMS) or medical-grade silicone, providing excellent flexibility and chemical stability, enabling it to withstand pressure and fluid flow. The diameter of the microchannels is typically between 50 and 300 μm, similar to the size of capillaries in real skin. The channel distribution pattern mimics the vascular network of real skin, forming a complex three-dimensional structure. Furthermore, the design of the microfluidic biomimetic vascular network 30 includes branching structures and circulation pathways to ensure uniform fluid distribution and simulate realistic blood flow.

[0026] The primary function of the circulatory system 40 is to simulate blood circulation by driving fluid flow within the microfluidic biomimetic vascular network 30 via a micro-piezoelectric pump. The micro-piezoelectric pump is made of low-power, high-efficiency piezoelectric material, capable of generating stable hydrodynamics. The reservoir is made of a soft, elastic material, such as medical-grade silicone, and can store a certain amount of simulated blood or other fluids. The flow rate of the micro-piezoelectric pump is adjustable, typically between 0.1 and 5.0 mL / min, to simulate blood flow velocities under different physiological conditions. The reservoir capacity is typically between 10 and 50 mL, ensuring continuous system operation. The circulatory system 40 is also equipped with pressure and flow sensors for real-time monitoring and regulation of fluid flow.

[0027] The temperature simulation and control device 50 is used to regulate the temperature of the bionic skin to approximate the physiological temperature of real skin. Its main function is to simulate skin temperature changes under different environmental conditions through heating or cooling. The device employs high-efficiency heating elements and heat dissipation materials, such as graphene heating films or semiconductor cooling chips, which have excellent thermal conductivity and stability, enabling rapid response to temperature changes. The device is also equipped with a temperature sensor and intelligent control algorithm, which automatically adjusts the heating or cooling intensity based on the ambient temperature and set values ​​to ensure the bionic skin surface temperature is maintained between 32 and 37°C.

[0028] This application achieves a high degree of simulation in three dimensions: visual appearance, tactile sensation, and physiological function, through the synergistic effect of a multi-layered structure. The translucent silicone outer layer 10 provides realistic skin color and texture, while the ultra-soft silicone inner layer 20 simulates the softness and elasticity of skin. The microfluidic biomimetic vascular network 30, combined with the circulatory system 40, simulates blood flow and enhances the dynamic physiological characteristics of the skin. The temperature simulation and control device 50 further improves the realism of the biomimetic skin, giving it broad application potential in medical aesthetics, robotics, and human-computer interaction.

[0029] In some specific embodiments, the inner wall of the microfluidic biomimetic vascular network 30 is coated with a magnetron sputtered TiO2 / SiO2 multilayer film to regulate the optical color development of blood vessels.

[0030] Specifically, the inner walls of the microfluidic biomimetic vascular network 30 are coated with a TiO2 / SiO2 multilayer film using magnetron sputtering technology to regulate the optical color rendering of the blood vessels. By precisely controlling the thickness and composition of the film, the coating can simulate the optical properties of real skin, thereby significantly improving the visual realism of the biomimetic skin. Magnetron sputtering technology, with its high-precision film deposition capability, ensures the uniformity and performance consistency of the coating, while providing good biocompatibility and durability. The TiO2 / SiO2 multilayer film has anti-reflective and high transmittance properties, effectively reducing light reflection and increasing transmittance, further optimizing the visual effect of the biomimetic skin. By adjusting the reflection and transmission of light, the color and texture of real skin are simulated, making the biomimetic skin visually closer to real skin. Furthermore, the film prepared by magnetron sputtering also has excellent chemical stability and durability, ensuring that the biomimetic skin system maintains its optical performance and functional stability during long-term use. This not only enhances the visual effect of the biomimetic skin but also improves the overall functionality and reliability of the system.

[0031] In some specific embodiments, the translucent silicone outer layer 10 has a layered dyeing structure inside. This structure includes a bottom layer of flesh-colored silicone ink sprayed onto the surface and a middle layer of injected red dye to simulate capillaries. This multi-layered design, with the bottom layer using flesh-colored silicone ink to provide the basic skin tone for the bionic skin, and the middle layer using red dye to simulate the visual effect of capillaries, significantly enhances the realism of the bionic skin. This not only enhances the visual effect but also ensures the high light transmittance and durability of the translucent silicone outer layer 10. Furthermore, this layered dyeing technology also exhibits good biocompatibility and chemical stability, ensuring that it will not cause harm to the human body in various application scenarios.

[0032] In some specific embodiments, the outer surface of the translucent silicone outer layer 10 has a skin texture formed by nanoimprinting, with a surface roughness Ra of 20-50 μm and a light transmittance of 85%-90%. By forming micron-level textures on the silicone surface using nanoimprinting technology, the pores and fine lines of real skin are simulated, significantly improving visual realism. Utilizing nanoimprinting technology, complex micro-nano structure patterns are replicated on the silicone surface, which not only enhances the visual effect but also effectively scatters light and reduces reflection, allowing the bionic skin to present a more natural appearance under different lighting conditions. Nanoimprinting technology, with its advantages of high resolution, low cost, and high efficiency, is suitable for the rapid replication and mass production of large-area patterns. The light transmittance of the translucent silicone outer layer 10 is controlled between 85% and 90% to ensure sufficient light can pass through, presenting a visual effect close to real skin while maintaining good optical and mechanical properties.

[0033] In some specific embodiments, a flexible LED array is embedded in the ultra-soft silicone inner layer 20, with the LEDs spaced 2-8 mm apart and having a thickness of 0.1-0.3 mm.

[0034] Specifically, by embedding a flexible LED array to simulate the microvascular network of real skin, a dynamic visual effect is provided for bionic skin. This LED array uses inorganic LEDs or quantum dot light-emitting diodes (QLEDs) as light-emitting elements, featuring high brightness, low operating voltage, and good flexibility, adapting to the soft characteristics of the ultra-soft silicone inner layer 20. QLEDs, due to their excellent color purity and ease of processing, are particularly suitable for high-resolution flexible displays. By precisely controlling the spacing and thickness of the LEDs, uniform light distribution can be achieved, enhancing the visual realism of the bionic skin.

[0035] In some specific embodiments, the temperature simulation control device 50 includes a graphene heating film and a semiconductor cooling chip. The graphene heating film is embedded between the light-transmitting silicone outer layer 10 and the ultra-soft silicone inner layer 20, and the semiconductor cooling chip is fixed to the base side of the ultra-soft silicone inner layer 20.

[0036] Specifically, precise temperature control of bionic skin is achieved by integrating a graphene heating film and a semiconductor cooling chip. The graphene heating film is embedded between the translucent silicone outer layer 10 and the ultra-soft silicone inner layer 20, with a preferred power density of 0.5 W / cm², enabling rapid and uniform heat distribution to simulate the warmth of real skin. The semiconductor cooling chip is fixed to the substrate side of the ultra-soft silicone inner layer 20, achieving precise cooling control through thermoelectric effects to simulate skin temperature changes in cold environments. Combined with an NTC temperature sensor, the device can achieve precise temperature control within ±1℃, ensuring the bionic skin surface temperature remains stable within the set range. In some specific implementations, the channel diameter is 50-300 μm, and the channel is filled with thermosensitive PNIPAM hydrogel.

[0037] Specifically, the channels of the microfluidic biomimetic vascular network 30 are filled with thermosensitive PNIPAM hydrogel, with channel diameters ranging from 50 to 300 μm. PNIPAM (poly(N-isopropylacrylamide)) is a thermosensitive polymer material with both hydrophilic amide groups and hydrophobic isopropyl groups on its molecular chain. At low temperatures, PNIPAM exhibits hydrophilicity and swells; when the temperature reaches its lower critical solution temperature (LCST), approximately 32°C, PNIPAM transforms into hydrophobicity and shrinks. By adjusting the temperature, the volume change of the hydrogel can be achieved, simulating the physiological response of real skin. Furthermore, the optical transparency of the PNIPAM hydrogel also changes with temperature, further enhancing the visual realism of the biomimetic skin. This not only improves the dynamic response capability of the biomimetic skin but also provides new possibilities for applications in drug release, tissue engineering, and smart materials.

[0038] In some specific implementations, the flow rate accuracy of the micro piezoelectric pump is ±0.1 ml / min.

[0039] Specifically, a miniature piezoelectric pump is used in the microfluidic biomimetic vascular network 30 to achieve precise control of the liquid. This miniature piezoelectric pump has a flow accuracy of ±0.1 ml / min, ensuring stable liquid flow within the microfluidic biomimetic vascular network 30. It can precisely adjust the liquid flow rate, thereby simulating different physiological states.

[0040] In some specific implementations, a biomimetic thermal radiation system is also included to simulate the thermal radiation characteristics of the human body; The biomimetic thermal radiation system includes a graphene / PEDOT (poly(3,4-ethylenedioxythiophene)):PSS (polystyrene sulfonate) composite electrothermal film, phase change material microcapsules, and an infrared radiation control layer. The graphene / PEDOT:PSS composite electrothermal film is disposed inside the translucent silicone outer layer 10 and is in contact with the infrared radiation control layer. The phase change material microcapsules are uniformly dispersed in the ultra-soft silicone inner layer 20 and form thermal coupling with the graphene / PEDOT:PSS composite electrothermal film. The infrared control layer is bonded to the translucent silicone outer layer 10 with optical adhesive.

[0041] Specifically, by integrating a graphene / PEDOT:PSS composite electrothermal film, phase change material microcapsules, and an infrared radiation modulation layer, precise simulation of the thermal radiation characteristics of biomimetic skin was achieved. The graphene / PEDOT:PSS composite electrothermal film possesses high electrical conductivity and low thermal conductivity, enabling rapid response to temperature changes and providing stable heat output. The phase change material microcapsules are uniformly dispersed within the ultra-soft silicone inner layer 20, forming thermal coupling with the electrothermal film to store and release heat, simulating the thermoregulation function of real skin. The infrared radiation modulation layer is bonded to the translucent silicone outer layer 10 with optical adhesive to regulate the emissivity of infrared radiation, further enhancing the thermal radiation characteristics of the biomimetic skin.

[0042] In some specific embodiments, the translucent silicone outer layer 10 and the ultra-soft silicone inner layer 20 are bonded together by plasma treatment; wherein, the plasma treatment parameters include: radio frequency power of 90-110W and working gas of Ar / O2 mixed gas.

[0043] Specifically, the translucent silicone outer layer 10 and the ultra-soft silicone inner layer 20 are bonded together through plasma treatment, which improves the bonding performance. Plasma treatment alters the chemical composition and structure of the silicone surface by cleaning, activating, increasing roughness, and improving wettability, thereby enhancing the adhesion of the adhesive. The radio frequency power of the plasma treatment is 90-110W, and the working gas is an Ar / O2 mixture, ensuring high efficiency and uniformity of the treatment.

[0044] In some specific embodiments, the surface of the translucent silicone outer layer 10 is coated with a fluorosilane hydrophobic coating.

[0045] Specifically, the outer layer 10 of the translucent silicone is coated with a fluorosilane hydrophobic coating. This coating has a surface contact angle greater than 110 degrees, giving it excellent superhydrophobic properties. Water droplets exhibit high sphericity on the coating surface and roll off quickly, achieving a self-cleaning effect. It not only effectively blocks the adhesion of water, oil, and contaminants, keeping the surface clean, but also significantly reduces the risk of liquid penetration, extending the material's service life. While maintaining the substrate's high light transmittance, the fluorosilane coating also possesses good weather resistance and mechanical stability, ensuring long-term effectiveness of the hydrophobic properties.

[0046] The above are merely optional embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A biomimetic skin system, characterized in that, include: Translucent silicone outer layer (10): Located on the outermost layer, used to simulate the appearance of skin; Ultra-soft silicone inner layer (20): It is attached to the inner side of the light-transmitting silicone outer layer (10) and is combined with the light-transmitting silicone outer layer (10) to form an anthropomorphic skin structure; Microfluidic biomimetic vascular network (30): Embedded in the ultra-soft silicone inner layer (20), it is composed of a series of microchannels; Circulatory system (40): includes a micro piezoelectric pump and a reservoir, wherein the micro piezoelectric pump is connected to the microfluidic biomimetic vascular network (30) and the reservoir is used to store liquid; Temperature simulation control device (50) is used to regulate the temperature of bionic skin.

2. The bionic skin system according to claim 1, characterized in that, The inner wall of the microfluidic biomimetic vascular network (30) is coated with a magnetron sputtered TiO2 / SiO2 multilayer film to regulate the optical color development of blood vessels.

3. The bionic skin system according to claim 1, characterized in that, The translucent silicone outer layer (10) has a layered dyeing structure inside, which includes a flesh-colored silicone ink sprayed at the bottom layer and a red dye injected in the middle layer to simulate capillaries. The outer surface of the translucent silicone outer layer (10) has a skin texture formed by nanoimprinting, with a surface roughness Ra of 20-50 μm and a light transmittance of 85%-90%.

4. The bionic skin system according to claim 1, characterized in that, The ultra-soft silicone inner layer (20) is embedded with a flexible LED array, the LEDs being spaced 2-8 mm apart and having a thickness of 0.1-0.3 mm.

5. The bionic skin system according to claim 1, characterized in that, The temperature simulation control device (50) includes a graphene heating film and a semiconductor cooling chip. The graphene heating film is embedded between the light-transmitting silicone outer layer (10) and the ultra-soft silicone inner layer (20), and the semiconductor cooling chip is fixed to the base side of the ultra-soft silicone inner layer (20).

6. The bionic skin system according to claim 1, characterized in that, The channel has a diameter of 50-300 μm and is filled with thermosensitive PNIPAM hydrogel.

7. The bionic skin system according to claim 1, characterized in that, The flow rate accuracy of the micro piezoelectric pump is ±0.1 ml / min.

8. The bionic skin system according to claim 1, characterized in that, It also includes a biomimetic thermal radiation system to simulate the thermal radiation characteristics of the human body; The biomimetic thermal radiation system includes a graphene / PEDOT:PSS composite electrothermal film, phase change material microcapsules, and an infrared radiation control layer; wherein, the graphene / PEDOT:PSS composite electrothermal film is disposed inside the light-transmitting silicone outer layer (10) and is in contact with the infrared radiation control layer; the phase change material microcapsules are uniformly dispersed in the ultra-soft silicone inner layer (20) and form thermal coupling with the graphene / PEDOT:PSS composite electrothermal film; the infrared control layer is bonded to the light-transmitting silicone outer layer (10) by optical adhesive.

9. The bionic skin system according to claim 1, characterized in that, The translucent silicone outer layer (10) and the ultra-soft silicone inner layer (20) are bonded together by plasma treatment; wherein, the plasma treatment parameters include: radio frequency power of 90-110W and working gas of Ar / O2 mixed gas.

10. The bionic skin system according to claim 1, characterized in that, The surface of the translucent silicone outer layer (10) is coated with a fluorosilane hydrophobic coating.

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