Preparation method of flexible pressure sensor based on regenerated collagen film

Abstract

The invention discloses a preparation method of a pressure sensor based on collagen film. The method comprises the following steps that hide powder is dissolved in an ionic liquid for the formation of a homogeneous and transparent collagen solution, a substrate is spin-coated with the collagen solution for the formation of a uniform film, then the substrate is soaked in deionized water and washed, the film is taken out for drying till a constant weight is reached, and a regenerated collagen film is obtained; a layer of electrode is smeared on a collagen film with the method of template, while a layer of conductive material is smeared on the other collagen film with the method of spin-coating, and the two layers are made in contact and compressed, so that the preparation of the flexible pressure sensor is completed. The preparation method has the advantages of simple preparation method, convenient material selection, low cost, high sensitivity and biodegradability of the prepared flexible pressure sensor, and can be applied to the detection of human's limb activities and voice recognition, thereby having a far-reaching effect on the development of portable flexible devices.

Description

technical field

[0001] The invention relates to the preparation of a flexible pressure sensor, in particular to a method for preparing a flexible pressure sensor based on a regenerated collagen film. Background technique

[0002] Flexible pressure sensor is a new type of sensor that can deform under pressure and express the deformation in the form of electrical signals. Because it has the same ability to perceive the outside world as human skin, it is often used in bionic "electronic skin" "system. Compared with traditional sensors, flexible sensors have the properties of flexibility, stretchability, and high sensitivity, so they have attracted extensive attention and are widely used in robotics, wearable devices, human-computer interaction and other fields. In recent years, the rapid development of electronic sensing technology and organic electronics has promoted the development of flexible pressure sensors, and pressure sensors as a type of information acquisition device...

Examples

Embodiment 1

[0029] Weigh 5g of ionic liquid [BMIM]Cl into a 50ml round-bottomed flask, gradually add 300mg of kraft powder to dissolve to form a uniform and transparent solution, and spin-coat it on a glass sheet to form a uniform 3μm film, then place the glass sheet Stand and soak in deionized water, and replace the deionized water every 0.5h for a total of 3 times. The membrane was then taken out and dried to constant weight to obtain a regenerated collagen film. A layer of interdigitated electrodes is coated on one film by the template method, and a layer of silver nanowires is coated on the other film by spin coating, and then the two layers are contacted (the interdigitated electrodes and the silver nanowires are placed between two layers of collagen film), and press it tightly to complete the preparation of the flexible pressure sensor. The current-voltage test curves of the obtained flexible pressure sensor under different pressures are as follows: image 3 As shown, it is used i...

Embodiment 2

[0031] Weigh 5g of ionic liquid [EMIM]Ac in a 50ml round-bottomed flask, gradually add 500mg of crushed cowhide powder to dissolve, and form a uniform and transparent syrup-like solution, which is spin-coated on a glass sheet to form a uniform 1 μm film. Then the glass plate was soaked in deionized water, and the deionized water was replaced every 0.5 h, for a total of 3 times. The membrane was then taken out and dried to constant weight to obtain a regenerated collagen film. A dendritic electrode is coated on one film by template method, and carbon nanotubes are coated on the other film by spin coating method, and then the two layers are contacted (interdigitated electrodes and silver nanowires are placed on two sides). between the layers of collagen film) and pressed tightly, the preparation of the flexible pressure sensor is completed. Use it for pronunciation recognition test curves such as Figure 5 shown.

Embodiment 3

[0033] Weigh 5g of ionic liquid [BMIM]Cl in a 50ml round-bottomed flask, gradually add 1000mg of crushed cowhide powder to dissolve, and form a uniform and transparent syrup-like solution, which is then spin-coated on a glass sheet to form a uniform 5 μm film. Then the glass plate was soaked in deionized water, and the deionized water was replaced every 0.5 h, for a total of 3 times. The membrane was then taken out and dried to constant weight to obtain a regenerated collagen film. A dendritic electrode is coated on one film by template method, and carbon nanotubes are coated on the other film by spin coating method, and then the two layers are contacted (interdigitated electrodes and silver nanowires are placed on two sides). between the layers of collagen film) and pressed tightly to complete the preparation of the flexible pressure sensor.

technical field

[0001] The invention relates to the preparation of a flexible pressure sensor, in particular to a method for preparing a flexible pressure sensor based on a regenerated collagen film. Background technique

[0002] Flexible pressure sensor is a new type of sensor that can deform under pressure and express the deformation in the form of electrical signals. Because it has the same ability to perceive the outside world as human skin, it is often used in bionic "electronic skin" "system. Compared with traditional sensors, flexible sensors have the properties of flexibility, stretchability, and high sensitivity, so they have attracted extensive attention and are widely used in robotics, wearable devices, human-computer interaction and other fields. In recent years, the rapid development of electronic sensing technology and organic electronics has promoted the development of flexible pressure sensors, and pressure sensors as a type of information acquisition device...

Examples

Embodiment 1

[0029] Weigh 5g of ionic liquid [BMIM]Cl into a 50ml round-bottomed flask, gradually add 300mg of kraft powder to dissolve to form a uniform and transparent solution, and spin-coat it on a glass sheet to form a uniform 3μm film, then place the glass sheet Stand and soak in deionized water, and replace the deionized water every 0.5h for a total of 3 times. The membrane was then taken out and dried to constant weight to obtain a regenerated collagen film. A layer of interdigitated electrodes is coated on one film by the template method, and a layer of silver nanowires is coated on the other film by spin coating, and then the two layers are contacted (the interdigitated electrodes and the silver nanowires are placed between two layers of collagen film), and press it tightly to complete the preparation of the flexible pressure sensor. The current-voltage test curves of the obtained flexible pressure sensor under different pressures are as follows: image 3 As shown, it is used i...

Embodiment 2

[0031] Weigh 5g of ionic liquid [EMIM]Ac in a 50ml round-bottomed flask, gradually add 500mg of crushed cowhide powder to dissolve, and form a uniform and transparent syrup-like solution, which is spin-coated on a glass sheet to form a uniform 1 μm film. Then the glass plate was soaked in deionized water, and the deionized water was replaced every 0.5 h, for a total of 3 times. The membrane was then taken out and dried to constant weight to obtain a regenerated collagen film. A dendritic electrode is coated on one film by template method, and carbon nanotubes are coated on the other film by spin coating method, and then the two layers are contacted (interdigitated electrodes and silver nanowires are placed on two sides). between the layers of collagen film) and pressed tightly, the preparation of the flexible pressure sensor is completed. Use it for pronunciation recognition test curves such as Figure 5 shown.

Embodiment 3

[0033] Weigh 5g of ionic liquid [BMIM]Cl in a 50ml round-bottomed flask, gradually add 1000mg of crushed cowhide powder to dissolve, and form a uniform and transparent syrup-like solution, which is then spin-coated on a glass sheet to form a uniform 5 μm film. Then the glass plate was soaked in deionized water, and the deionized water was replaced every 0.5 h, for a total of 3 times. The membrane was then taken out and dried to constant weight to obtain a regenerated collagen film. A dendritic electrode is coated on one film by template method, and carbon nanotubes are coated on the other film by spin coating method, and then the two layers are contacted (interdigitated electrodes and silver nanowires are placed on two sides). between the layers of collagen film) and pressed tightly to complete the preparation of the flexible pressure sensor.

Images