A flexible sensing element of polyvinyl chloride ion gel and its preparation method

Abstract

The invention provides a flexible sensing element of polyvinyl chloride ion gel and a preparation method thereof. The sensing element is composed of polyvinyl chloride ion gel and metal electrodes clamped at both ends thereof; when connected to an active circuit , the sensing element is deformed by force, and its internal resistance will change approximately linearly with the macroscopic deformation; when connected to a passive circuit, the sensing element will be deformed by force, and a potential difference will be generated between the two electrodes; this application The provided sensing elements can be used in flexible sensing systems, both active and passive sensing modes, which have good flexibility, stretchability and environmental adaptability, and can be used in wearable flexible electronic devices, bionic The field of artificial skin has a good application prospect.

Description

technical field

[0001] The invention relates to a flexible sensing element of polyvinyl chloride ion gel and a preparation method thereof, belonging to the field of intelligent materials. Background technique

[0002] In recent years, the rise of flexible electronic devices has promoted the development of a number of soft smart materials. Soft materials for flexible electronic devices should not only have excellent electrical conductivity, but also should take into account good mechanical properties (stretchability, strength, toughness). Soft materials usually used in flexible electronic devices are composed of elastic substrates and conductors. Conductors generally include carbon nanotubes, graphene, metal nanowires or metal nanoparticles, etc., but this type of material is durable in the case of large deformation. Poor, which greatly weakens the performance of the material.

[0003] In addition, hydrogels have attracted extensive attention from researchers in the fields ...

Examples

Embodiment 1

[0038] Preparation and performance test of flexible sensing element of active polyvinyl chloride ion gel

[0039] Preparation Process:

[0040] Step 1) Polymer Mixing:

[0041]Take a clean conical flask, add 2.4137 g dibutyl adipate, 5.1723 g tetrahydrofuran and 0.4868 g ionic liquid 1-ethyl-3-methylimidazolium thiocyanate (EMImSCN) to the conical flask in sequence At room temperature, stir with a magnetic stirrer at a speed of 1500 r / min for 10 min to allow the three liquids to initially mix to obtain a preliminary mixture; then, slowly add 0.3448 g of polyvinyl chloride powder to the above preliminary mixture through a funnel and continue stirring The mixture was placed in a 200W ultrasonic cleaner for 10 minutes, and then the mixture was ultrasonically treated for 30 minutes until the polyvinyl chloride powder was evenly dispersed in the mixture for further dissolution; finally, the mixture was stirred at room temperature with a magnetic stirrer at 1500 r / min Stir at a hi...

Embodiment 2

[0056] Example 2 Preparation and Performance Testing of Flexible Sensing Elements of Passive Polyvinyl Chloride Iongel

[0057] Preparation Process:

[0058] Step 1) Polymer mixing: take a clean conical flask, add 1.568 g dibutyl adipate, 3.36 g tetrahydrofuran and 0.316 g ionic liquid 1-ethyl-3-methylimidazole to the conical flask in sequence Thiocyanate (EMImSCN), stirred with a magnetic stirrer at a speed of 1500 r / min for 10 min at room temperature to allow the three liquids to initially mix; then, slowly add 0.224 g of polyvinyl chloride powder into the above mixture through a funnel, Continue to stir the mixture for 10 min, then place the mixture in a 200W ultrasonic cleaner for 30 min, until the polyvinyl chloride powder is evenly dispersed in the mixture for further dissolution; finally, the mixture is heated at room temperature with a magnetic stirrer at 1500 r Stir at a speed of 24 h until the polyvinyl chloride is completely dissolved;

[0059] Step 2) Ionic gel c...

technical field

[0001] The invention relates to a flexible sensing element of polyvinyl chloride ion gel and a preparation method thereof, belonging to the field of intelligent materials. Background technique

[0002] In recent years, the rise of flexible electronic devices has promoted the development of a number of soft smart materials. Soft materials for flexible electronic devices should not only have excellent electrical conductivity, but also should take into account good mechanical properties (stretchability, strength, toughness). Soft materials usually used in flexible electronic devices are composed of elastic substrates and conductors. Conductors generally include carbon nanotubes, graphene, metal nanowires or metal nanoparticles, etc., but this type of material is durable in the case of large deformation. Poor, which greatly weakens the performance of the material.

[0003] In addition, hydrogels have attracted extensive attention from researchers in the fields ...

Examples

Embodiment 1

[0038] Preparation and performance test of flexible sensing element of active polyvinyl chloride ion gel

[0039] Preparation Process:

[0040] Step 1) Polymer Mixing:

[0041]Take a clean conical flask, add 2.4137 g dibutyl adipate, 5.1723 g tetrahydrofuran and 0.4868 g ionic liquid 1-ethyl-3-methylimidazolium thiocyanate (EMImSCN) to the conical flask in sequence At room temperature, stir with a magnetic stirrer at a speed of 1500 r / min for 10 min to allow the three liquids to initially mix to obtain a preliminary mixture; then, slowly add 0.3448 g of polyvinyl chloride powder to the above preliminary mixture through a funnel and continue stirring The mixture was placed in a 200W ultrasonic cleaner for 10 minutes, and then the mixture was ultrasonically treated for 30 minutes until the polyvinyl chloride powder was evenly dispersed in the mixture for further dissolution; finally, the mixture was stirred at room temperature with a magnetic stirrer at 1500 r / min Stir at a hi...

Embodiment 2

[0056] Example 2 Preparation and Performance Testing of Flexible Sensing Elements of Passive Polyvinyl Chloride Iongel

[0057] Preparation Process:

[0058] Step 1) Polymer mixing: take a clean conical flask, add 1.568 g dibutyl adipate, 3.36 g tetrahydrofuran and 0.316 g ionic liquid 1-ethyl-3-methylimidazole to the conical flask in sequence Thiocyanate (EMImSCN), stirred with a magnetic stirrer at a speed of 1500 r / min for 10 min at room temperature to allow the three liquids to initially mix; then, slowly add 0.224 g of polyvinyl chloride powder into the above mixture through a funnel, Continue to stir the mixture for 10 min, then place the mixture in a 200W ultrasonic cleaner for 30 min, until the polyvinyl chloride powder is evenly dispersed in the mixture for further dissolution; finally, the mixture is heated at room temperature with a magnetic stirrer at 1500 r Stir at a speed of 24 h until the polyvinyl chloride is completely dissolved;

[0059] Step 2) Ionic gel c...

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