Bio-inspired ultra-sensitive flexible pressure sensor and preparation method thereof

A pressure sensor, bio-inspired technology, applied in the direction of fluid pressure measurement, instrument, and measurement force by changing the ohmic resistance, it can solve the problems of poor temperature stability, long response time, etc., and achieve good adhesion, low detection limit, The effect of simple synthesis process

Active Publication Date: 2022-07-15
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the traditional composite compressive resistive flexible pressure sensor often has performance defects such as long response time and poor temperature stability due to the dispersion of the filler and the inherent viscoelasticity of the resin. Stable compressive resistive flexible pressure sensor is very necessary

Method used

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  • Bio-inspired ultra-sensitive flexible pressure sensor and preparation method thereof
  • Bio-inspired ultra-sensitive flexible pressure sensor and preparation method thereof
  • Bio-inspired ultra-sensitive flexible pressure sensor and preparation method thereof

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Embodiment Construction

[0036] The present invention will be further described below with reference to specific embodiments and accompanying drawings, but the present invention is not limited to the following embodiments. The methods are conventional methods unless otherwise specified. The raw materials can be obtained from open commercial sources unless otherwise specified.

[0037] Dimethicone prepolymer (Dow Corning 184) and curing agent were first mixed in a 2:1 ratio and air bubbles were removed in a vacuum desiccator. The mixture was then spin coated on a glass substrate and cured in an oven at 80°C for 3 hours. Place an appropriate amount of dry powder of 5 μm silica particles on the above polydimethylsiloxane substrate, and use another piece of polydimethylsiloxane cured by the same procedure (prepolymer: curing agent = 10:1) One-way rubbing results in a single-layer silica array template. These templates were then heated at 220°C for 72 hours.

[0038] Afterwards, the polydimethylsiloxan...

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Abstract

The invention relates to a biologically inspired ultra-sensitive flexible pressure sensor and a preparation method thereof. For the thin film, the nano-scale polyaniline thorn-shaped array is uniformly distributed on the micron-scale polydimethylsiloxane columnar array. The structure can generate two times of interlocking effects when being subjected to external force, so that the sensitivity is greatly improved while the use range of the sensor is ensured. The preparation method comprises the following steps: (1) preparing a micron-sized polydimethylsiloxane columnar array; (2) preparing a nanoscale polyaniline thorn-shaped array; and (3) assembling the ultra-sensitive pressure sensor based on the hierarchical polyaniline / polydimethylsiloxane array. The prepared product has the advantages of ultrahigh sensitivity, ultralow detection limit, short response time, excellent cycle stability, outstanding environmental adaptability, simple preparation method, mature process and no pollution to the environment, and has considerable application prospects in the fields of human health monitoring, human-computer interaction and the like.

Description

technical field [0001] The invention relates to an ultra-sensitive pressure flexible sensor and a preparation method thereof, belonging to the technical field of preparation of flexible electronic materials. Background technique [0002] A pressure sensor is a device or device that can sense pressure signals and convert the pressure signals into usable output electrical signals according to certain rules. Pressure sensor is the most commonly used sensor in industrial practice. It is widely used in various industrial automation environments, involving water conservancy and hydropower, railway transportation, intelligent buildings, production automation, aerospace, military, petrochemical, oil wells, electric power, ships, machine tools , pipeline and many other industries. [0003] Traditional pressure sensors usually use MEMS sensors, which have good stability and relatively high test accuracy, but their applications in the fields of human physiological signal monitoring an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/22G01L9/02
CPCG01L1/22G01L9/02
Inventor 武利民马言
Owner FUDAN UNIV
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