Preparation method of high-spatial-resolution flexible tactile sensor

Abstract

The invention discloses a preparation method of a high-spatial-resolution flexible tactile sensor, relates to the technical field of tactile sensor preparation, and aims at solving the problem that a traditional tactile sensor has many limitations in the aspects of spatial resolution and preparation effect.The preparation method comprises the following steps that S1, a flexible PET plate is selected as a substrate, and the flexible PET plate is arranged on the substrate; a PET (Polyethylene Terephthalate) double-sided adhesive tape is arranged on the upper surface of the substrate in a hot pressing manner; s2, covering the PET double-sided adhesive tape with a layer of inhibition film which is used as a precursor of a reverse mold structure; s3, laser cutting is utilized, and a plurality of grooves of reverse mold structures are accurately cut in the PET double-sided tape covered with the inhibition film; s4, filling or depositing a flexible electrode and a high-sensitivity sensor material into the groove; s5, the sensor material in the groove is subjected to curing treatment; and S6, separating the inhibition film from the PET double-sided tape, so that the flexible electrode and the sensor material are fixed in the groove.

Description

Technical Field

[0001] The present invention relates to the technical field of tactile sensor preparation, and in particular to a method for preparing a flexible tactile sensor with high spatial resolution. Background Art

[0002] With the rapid development of science and technology, tactile sensors are increasingly used in existing smart devices. Tactile sensors are sensors that can mimic the sense of touch. They can not only mimic the sensory function of human skin and perceive external mechanical stimuli, but also convert these stimuli into processable electrical signals for information transmission. Although traditional tactile sensors have achieved certain application results in some fields, they still have many limitations in terms of spatial resolution and preparation efficiency, which restricts their further development in the field of high precision. Summary of the invention

[0003] The present invention proposes a method for preparing a flexible tactile sensor with high spatial resolution, which comprises the following steps: S1: Select a flexible PET board as a substrate, and heat-press a PET double-sided tape on the upper surface of the substrate; S2: Covering the PET double-sided tape with a layer of inhibitory film to serve as a precursor of the reverse mold structure; S3: using laser cutting to accurately cut a plurality of grooves of reverse mold structure on the PET double-sided tape covered by the inhibitory film; S4: filling or depositing a flexible electrode and a highly sensitive sensor material into the groove; S5: performing a curing process on the sensor material in the groove; S6: separating the inhibitory film from the PET double-sided tape, so that the flexible electrode and the sensor material are fixed in the groove.

[0004] The present invention is further configured as follows: wherein the flexible electrode is a conductive polymer, and the sensor material is a pressure-sensitive material or a strain-sensitive material.

[0005] The present invention is further configured as follows: the inhibitory film is made of a material that has an inhibitory effect on the PET double-sided tape.

[0006] The present invention is further configured as follows: wherein in step S4, the sensor material in the groove is cured by ultraviolet light.

[0007] The beneficial effects of the present invention are as follows: the preparation method disclosed in the present application can not only improve the spatial resolution of the tactile sensor, but also greatly simplify the preparation process of the tactile sensor, reduce the manufacturing cost, and based on the application of the reverse molding technology, can also improve the preparation accuracy and efficiency of the tactile sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 A schematic diagram of the reverse mold structure of the present invention is shown.

[0009] Figure 2 A schematic diagram of the structure of a complete tactile sensor is shown.

[0010] Figure 3 The tactile sensor manufactured by using the method is shown.

[0011] Figure numerals: 1. substrate; 2. PET double-sided tape; 3. inhibitory film; 4. electrolyte membrane. DETAILED DESCRIPTION

[0012] Those skilled in the art can refer to the content of this article and appropriately improve the process parameters. It is particularly important to point out that all similar replacements and modifications are obvious to those skilled in the art, and they are all considered to be included in the present invention. The methods and applications of the present invention have been described through preferred embodiments, and relevant personnel can modify or appropriately change and combine the methods and applications described herein without departing from the content, spirit and scope of the present invention to implement and apply the technology of the present invention.

[0013] The present invention proposes a method for preparing a flexible tactile sensor with high spatial resolution, comprising the following steps:

[0014] S1: Select a flexible PET board as the substrate, and heat-press a PET double-sided tape on the upper surface of the substrate.

[0015] S2: A layer of inhibition film is covered on the surface of the double-sided tape facing away from the substrate to serve as a precursor of the reverse mold structure.

[0016] S3: Using laser cutting, multiple grooves of the reverse mold structure are precisely cut on the PET double-sided tape covered with the inhibition film.

[0017] S4: Filling or depositing the flexible dots and highly sensitive sensor material into the grooves.

[0018] S5: Fixing the sensor material in the groove.

[0019] S6: Separate the inhibitory film from the PET double-sided tape so that the flexible electrodes and sensor materials are fixed in the grooves.

[0020] The flexible electrode is a conductive polymer, the sensor material is a pressure-sensitive material or a strain-sensitive material, the positive electrode of the sensor is made of CNT solution, and the negative electrode is made of MXene.

[0021] The inhibitory film is made of a material that has an inhibitory effect on the PET double-sided tape, that is, a release film is arranged on the surface of the inhibitory film on one side close to the PET double-sided tape.

[0022] In step S4, the sensor material in the groove is fixed by irradiating with ultraviolet light.

[0023] It should be noted that the thickness of the PET double-sided tape is set to 0.1mm, the laser cut groove area is 0.5mm×10mm rectangle, and the cutting depth is 0.1mm, 10 grooves are cut, and the 10 grooves are arranged equidistantly to ensure that the size and depth of the groove match the shape of the flexible electrode and sensor material, thereby ensuring that the sensor material can be stably and evenly distributed in the groove.

[0024] It should be noted that during curing, ultraviolet light is used for 1 hour to ensure the stability and consistency of the sensor material in the groove.

[0025] It should also be noted that when separating the inhibitory film and the PET double-sided tape in step S6, it is necessary to ensure the integrity of the sensor structure to avoid damaging the already cured sensor material.

[0026] The substrate in the present application has good flexibility and mechanical strength, and is more suitable for the production of flexible electronic devices. Providing an inhibitory film can make it easier to separate the inhibitory film from the PET double-sided tape, thereby avoiding damage to the cured sensor material during separation.

[0027] The positive electrode template and the negative electrode template of the sensor are respectively manufactured by the above method. The grooves on the positive electrode template and the negative electrode template are arranged at a 90-degree vertical intersection, and an electrolyte membrane is used to separate the two, thereby forming a complete tactile sensor with high spatial resolution.

[0028] In summary, the preparation method disclosed in the present invention can not only improve the spatial resolution of the tactile sensor, but also greatly simplify the preparation process of the tactile sensor, reduce the manufacturing cost, and based on the application of the reverse molding technology, it can also improve the preparation accuracy and efficiency of the tactile sensor.

[0029] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be within the scope of protection of the present invention.

Claims

1. A method for preparing a flexible tactile sensor with high spatial resolution, characterized in that: The following steps are included: S1: Select a flexible PET board as a substrate, and heat-press a PET double-sided tape on the upper surface of the substrate; S2: Covering the PET double-sided tape with a layer of inhibitory film to serve as a precursor of the reverse mold structure; S3: using laser cutting to accurately cut a plurality of grooves of reverse mold structure on the PET double-sided tape covered by the inhibitory film; S4: filling or depositing a flexible electrode and a highly sensitive sensor material into the groove; S5: performing a curing process on the sensor material in the groove; S6: separating the inhibitory film from the PET double-sided tape, so that the flexible electrode and the sensor material are fixed in the groove.

2. The method for preparing a flexible tactile sensor with high spatial resolution according to claim 1, characterized in that: The flexible electrode is a conductive polymer, and the sensor material is a pressure-sensitive material or a strain-sensitive material.

3. The method for preparing a high spatial resolution flexible tactile sensor according to claim 1 or 2, characterized in that: The inhibitory film is made of a material that has an inhibitory effect on the PET double-sided tape.

4. The method for preparing a flexible tactile sensor with high spatial resolution according to claim 1, characterized in that: In step S4, the sensor material in the groove is cured by ultraviolet light.

Images