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Method for preparing stretchable breath detection material

A detection material and pre-stretching technology, which is applied in the field of pre-stretching release to prepare stretchable breathing detection materials, can solve the problems of complex preparation process, high cost, and difficulty in mass production, and achieve simple preparation process and low cost , The effect of simple and easy preparation process

Inactive Publication Date: 2017-05-31
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a simple pre-stretch release method for preparing stretchable breathing detection materials, which is used to solve the technical problems of high cost of existing materials, complicated preparation process, and difficulty in mass production.

Method used

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  • Method for preparing stretchable breath detection material
  • Method for preparing stretchable breath detection material
  • Method for preparing stretchable breath detection material

Examples

Experimental program
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Effect test

example 1

[0025] Step 1, Compounding: Pre-stretch: The viscous rubber VHB substrate is pre-stretched by 300%.

[0026] Step 2, paste: paste the nitrile rubber membrane on the VHB substrate in step 1.

[0027] Step 3, releasing: the strain of the VHB substrate in step 2 is released (forming a wrinkled nitrile rubber film), and a stretched breathing detection material is obtained. The microscopic morphology is shown in Fig. 1(a).

[0028] A digital ammeter was used to test the change of the current signal over time, and the performance of the stretched breathing detection material was obtained as shown in Figure 2(a) (the signal corresponding to weak breathing in the first 30 seconds, and the signal corresponding to strong breathing in the last 30 seconds). Compared with prior art or method, this example is simpler in process (does not involve harsh environment such as high temperature and high pressure, does not have any chemical reaction etc.), raw material cost is lower (does not use ...

example 2

[0030] Step 1, Compounding: Pre-stretching: The viscous rubber VHB substrate is pre-stretched by 200%.

[0031] Step 2, paste: paste the nitrile rubber membrane on the VHB substrate in step 1.

[0032] Step 3, releasing: the strain of the VHB substrate in step 2 is released (forming a wrinkled nitrile rubber film), and a stretched breathing detection material is obtained. The microscopic morphology is shown in Fig. 1(b).

[0033] A digital ammeter was used to test the change of the current signal over time, and the performance of the stretched breathing detection material was obtained as shown in Figure 2(b) (the signal corresponding to weak breathing in the first 30 seconds, and the signal corresponding to strong breathing in the last 30 seconds). Compared with prior art or method, this example is simpler in process (does not involve harsh environment such as high temperature and high pressure, does not have any chemical reaction etc.), raw material cost is lower (does not u...

example 3

[0035] Step 1, Formulation: Pre-stretch: The viscous rubber VHB substrate is pre-stretched by 500%.

[0036] Step 2, paste: paste the nitrile rubber membrane on the VHB substrate in step 1.

[0037] Step 3, releasing: the strain of the VHB substrate in step 2 is released (forming a wrinkled nitrile rubber film), and a stretched breathing detection material is obtained. The microscopic morphology is shown in Fig. 1(c).

[0038] A digital ammeter was used to test the change of the current signal over time, and the performance of the stretched breathing detection material was obtained as shown in Figure 2(c) (the signal corresponding to weak breathing in the first 30 seconds, and the signal corresponding to strong breathing in the last 30 seconds). Compared with prior art or method, this example is simpler in process (does not involve harsh environment such as high temperature and high pressure, does not have any chemical reaction etc.), raw material cost is lower (does not use ...

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Abstract

The invention discloses a method for preparing a stretchable breath detection material. According to the method, a stretchable ultrahigh-viscosity adhesive tape VHB substrate is subjected to prestretching in a certain degree, then a butadiene-acrylonitrile rubber film is pasted to the pre-stretched VHB, finally, a wrinkled butadiene-acrylonitrile rubber film is formed by releasing prestress, and the stretchable breath detection material can be obtained. The mechanism of the material is the instantaneous conductive function of moisture during breathing forms a water molecule film on the surface of the wrinkled butadiene-acrylonitrile rubber film, that is, water molecules are condensed into the film during breathing so that resistance between electrodes can be decreased, and the water molecule film is volatilized instantly after breathing is stopped so that the resistance between the electrode can be increased, and accordingly, breath can be detected through current changes caused by resistance changes; meanwhile, due to the capillarity action achieved by wrinkles, the breath intensity can be distinguished through the material; the selected substrate is stretchable, so that the detection material has good tensility; and moreover, raw materials are low in cost, the preparation process is simple and convenient to operate, so that the material has the characteristic of low cost.

Description

technical field [0001] The invention belongs to the field of preparation methods and techniques of flexible breath sensor materials, and more specifically relates to a method for preparing stretchable breath detection materials by pre-stretching and release. Background technique [0002] The design and development of wearable human respiratory status monitoring has attracted a lot of attention in recent years, mainly due to the increase in medical costs and scientific and technological advancements such as tiny wearable sensors, smart textiles, microelectronics, and wireless communications. Promote, so that the wearable human respiratory status monitoring system can minimize the impact on the wearer's daily activities, in order to achieve personal health management under low physiological and psychological load and real-time monitoring of the patient's health status, such as early prediction of low sleep apnea Ventilation Syndrome etc. Therefore, the occurrence of various c...

Claims

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Application Information

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IPC IPC(8): B29C65/48
CPCB29C65/48B29C66/022
Inventor 喻研宋永明臧剑锋叶镭关曜东
Owner HUAZHONG UNIV OF SCI & TECH
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