A flexible polymer film that can be used for sound intensity detection and its manufacturing method

A flexible polymer and thin-film technology, applied in measuring devices, instruments, weather resistance/light resistance/corrosion resistance, etc., can solve the problems of inability to change shape, limited scope of application, poor transmission signal, etc., and achieve wide applicability and low cost , Good sticking effect

Active Publication Date: 2021-10-01
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these acoustic sensors are rigid, and they cannot change their shape, which will affect their inability to fit some curved surfaces in practical applications, resulting in problems such as poor transmission signals and limited scope of application.

Method used

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  • A flexible polymer film that can be used for sound intensity detection and its manufacturing method
  • A flexible polymer film that can be used for sound intensity detection and its manufacturing method
  • A flexible polymer film that can be used for sound intensity detection and its manufacturing method

Examples

Experimental program
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Effect test

Embodiment 1

[0041] A flexible polymer film that can be used for sound intensity detection provided by an embodiment of the present invention includes conductive powder and a polydimethylsiloxane film substrate (PDMS film substrate). PDMS is polydimethylsiloxane, which is odorless, high in transparency, and has Heat resistance, cold resistance, and the viscosity changes little with temperature. The conductive powder is dispersed in the polydimethylsiloxane film matrix, the average diameter of the conductive powder can be micron or nanoscale, and the conductive powder is evenly dispersed in the polydimethylsiloxane film matrix. When the methylsiloxane film substrate is subjected to sound pressure, the shape or / and size of the polydimethylsiloxane film substrate will undergo corresponding elastic deformation, and the resistance value of the flexible polymer film will change. By monitoring the flexibility The resistance value of the polymer film can realize the detection of sound intensity, a...

Embodiment 2

[0051] The embodiment of the present invention also provides a method for manufacturing a flexible polymer film that can be used for sound intensity detection, which can be used to manufacture the flexible polymer film that can be used for sound intensity detection described in Implementation 1. The manufacturing method includes the following steps:

[0052] Preparation of conductive powder, polydimethylsiloxane prepolymer and polydimethylsiloxane curing agent;

[0053] Adding the conductive powder to the polydimethylsiloxane prepolymer after pretreatment and mixing to obtain a blend;

[0054] Adding the polydimethylsiloxane curing agent into the mixture and mixing to obtain a solid to be cured;

[0055] The cured material is evenly spread to a set thickness and cured to obtain a flexible polymer film.

[0056] Specifically, the conductive powder can be silver powder, and the pretreatment includes the following steps:

[0057] After the silver powder is ground and refined, i...

Embodiment 3

[0074] This embodiment provides a sound intensity detection device using a flexible polymer film, including a flexible polymer film and a detection module for detecting the resistance of the flexible polymer film. The flexible polymer film can be the one in Embodiment 1. Flexible polymer film for sound intensity detection. The polymer film includes conductive powder and a polydimethylsiloxane film substrate, the conductive powder is dispersed in the polydimethylsiloxane film substrate, and the detection module is connected to the Both sides of the polydimethylsiloxane film substrate. The detection module can be a voltage detection module or a current detection module. That is, according to Ohm's law, a set current is applied, and the voltage of the flexible polymer film electrode is detected by the voltage detection module, so that the resistance value of the flexible polymer film can be obtained. Alternatively, a set voltage is applied to detect the current of the flexible ...

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Abstract

The invention is applicable to the technical field of sound intensity sensors, and discloses a flexible polymer film that can be used for sound intensity detection and a manufacturing method thereof. The flexible polymer film includes conductive powder and a polydimethylsiloxane film matrix, and the conductive powder is dispersed in the polydimethylsiloxane film matrix. The manufacturing method comprises the following steps: preparing conductive powder, polydimethylsiloxane prepolymer and polydimethylsiloxane curing agent; adding polydimethylsiloxane prepolymer after pretreating the conductive powder Mix in medium to obtain a homogeneous product; add polydimethylsiloxane curing agent to the mixed product and mix to obtain a to-be-cured product; spread the to-be-cured product to a set thickness and cure to obtain a flexible polymer film. The present invention provides a flexible polymer film that can be used for sound intensity detection and its manufacturing method. The flexible polymer film can be bent, twisted and stretched, and it can be attached to other surfaces in any shape, with good conformality , and the manufacturing method is simple and fast, and the manufacturing cost is low.

Description

technical field [0001] The invention belongs to the technical field of sound intensity sensors, and in particular relates to a flexible polymer film that can be used for sound intensity detection and a manufacturing method thereof. Background technique [0002] As the application requirements of the information age are getting higher and higher, the application of acoustic sensors is becoming more and more extensive. For example, in the military, sound sensors have been widely used in ground sensing, reconnaissance and surveillance systems, and their biggest feature is strong resolution. In medicine, optical microphones have natural anti-interference ability to magnetic fields and can be applied to MRI communication. In daily life, it can be used for daily portal access control, monitoring areas where intruders appear. An acoustic sensor is a device that converts physical and chemical quantities into electrical signals that are readily available. However, most of the soun...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/04C08K3/08C08J5/18G01N17/00
CPCC08J5/18C08J2383/04C08K2003/0806C08K2201/001G01N17/00
Inventor 李晖张劲杰王磊
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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