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A large-scale high-toughness nano-conductive rubber sensor and its preparation and packaging method

A nano-conducting and encapsulating technology, applied in other household appliances, household appliances, household components, etc., can solve the problems of rubber strength, poor resilience, local stress concentration, sensor structure damage, etc., and achieve mechanical strength and resilience. It can improve the high pressure resistance ability and the effect of wide pressure test range.

Active Publication Date: 2021-08-31
SHENZHEN MUNICIPAL DESIGN & RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the preparation process of the existing nano-conductive rubber, it is difficult to disperse the conductive filler uniformly in the rubber polymer, so it is necessary to add a large amount of conductive filler to reach the percolation threshold, and the increase of the conductive filler will lead to deterioration of the strength and resilience of the rubber. , thereby affecting the measurement range and sensitivity of the sensor; and the pressure resistance and stability of the nano-conductive rubber prepared by the traditional method also need to be improved
[0004] The traditional nano conductive rubber sensor has poor pressure resistance, so the test range is narrow, and the pressure test range is mostly distributed between 0 and 2MPa
For a very small number of large-range conductive rubber sensors, due to the design of the package structure, the internal stress of the sensor cannot be effectively offset, resulting in local stress concentration, which is easy to damage the structure of the sensor, greatly affecting the stability and life of the sensor.
The above problems severely limit the application of nano-conductive rubber sensors in construction engineering, bridge engineering, Internet of Things, smart wear, medical health, etc.

Method used

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  • A large-scale high-toughness nano-conductive rubber sensor and its preparation and packaging method
  • A large-scale high-toughness nano-conductive rubber sensor and its preparation and packaging method
  • A large-scale high-toughness nano-conductive rubber sensor and its preparation and packaging method

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Experimental program
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Effect test

preparation example Construction

[0050] The invention provides a preparation method of a large-scale high-toughness nano-conductive rubber sensor, comprising the following steps:

[0051] Mix the rubber base material and the nano conductive filler for high-temperature banburying to obtain the mixture;

[0052] Mixing the compound and vulcanizing agent for low-temperature banburying to obtain a nano-conductive rubber material;

[0053] Carrying out calendering and thinning treatment to the nano-conductive rubber material to obtain a calendered sheet;

[0054] Spread a layer of conductive film material on the upper and lower surfaces of the calendered sheet as electrodes, and then perform calendering and thin-pass processing to obtain a sandwich structure;

[0055] The sandwich structure is subjected to hot-press curing treatment to obtain a nano conductive rubber sensor.

[0056] In the invention, the rubber matrix material and the nano conductive filler are mixed for high-temperature banburying to obtain th...

Embodiment 1

[0086] Preparation of nano conductive rubber sensor:

[0087] In terms of parts by mass, the rubber base material is 100 parts of high-strength gas-phase silica gel GS-1050u, the nano-conductive filler is 7.8 parts of superconducting carbon black, and the vulcanizing agent is double-250.6 parts; the conductive film material is silver-plated fiber fabric with a thickness of 0.02 mm;

[0088] Mix the rubber base material and the nano-conductive filler for high-temperature banburying at a temperature of 120°C, first banbury at 40 rpm for 10 minutes, and then banbury at 20 rpm for 5 minutes to obtain a mixture;

[0089] Mix the mixture and vulcanizing agent for low-temperature banburying at a temperature of 40° C., a rotation speed of 40 rpm, and a time of 5 minutes to obtain a nano-conductive rubber material;

[0090] The nano conductive rubber material is subjected to calendering and thinning treatment to obtain a calendered sheet with a thickness of 1.5mm;

[0091] Spread a l...

Embodiment 2

[0102] Preparation of nano conductive rubber sensor:

[0103] Other conditions are identical with embodiment 1, only change the consumption of gas-phase silica gel GS-1050u into 70 parts, the consumption of superconducting carbon black is changed into 5.0 parts, and the vulcanizing agent consumption is changed into 0.6 part; Conductive film material is changed into copper foil, thickness 0.05mm;

[0104] Packaging of the sensor:

[0105] Other conditions are the same as in Example 1, only the temperature of the vulcanization package is changed to 180°C.

[0106] According to the method in Example 1, the performance test of the obtained sensor package was carried out, and the results obtained were similar to those of Example 1.

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Abstract

The invention relates to the technical field of pressure measurement, and provides a large-scale high-toughness nano-conductive rubber sensor and a preparation and packaging method thereof. The invention adopts the method of high-temperature banburying to improve the dispersibility of the conductive filler, and solidifies the sandwich structure under high pressure to make the rubber structure itself more compact; the nanometer conductive rubber sensor prepared by the invention has wide measurement range, good sensitivity and stability. The invention uses a rubber matrix to encapsulate the nano-conductive rubber sensor, and uses a casing, a cover plate and a sealing cover to seal the rubber matrix encapsulated with the sensor. At the same time, the rubber matrix package makes the sensor as a whole have excellent performances such as high temperature resistance, waterproof, fire resistance, ultraviolet resistance and acid and alkali corrosion resistance, better aging resistance stability, and longer service life under high load conditions longevity and safety.

Description

technical field [0001] The invention relates to the technical field of pressure measurement, in particular to a large-scale high-toughness nano-conductive rubber sensor and a preparation and packaging method thereof. Background technique [0002] Nano-conductive rubber is a composite material with conductive properties obtained by mixing nano-scale conductive fillers into the insulating polymer matrix. It has good piezoresistive properties, durability and flexibility, and has a wide range of applications in the field of pressure sensing. . [0003] In the preparation process of the existing nano-conductive rubber, it is difficult to disperse the conductive filler uniformly in the rubber polymer, so it is necessary to add a large amount of conductive filler to reach the percolation threshold, and the increase of the conductive filler will lead to deterioration of the strength and resilience of the rubber. , which in turn affects the measurement range and sensitivity of the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C43/24B29C43/30B29C43/28B29C43/32B29C43/18B29C43/36B29C65/56B29B7/00
CPCB29C43/24B29C43/30B29C43/28B29C43/32B29C43/18B29C43/36B29C65/56B29B7/002B29C2043/181B29L2031/752
Inventor 盖卫明吕双坤姜瑞娟支春义聂新民
Owner SHENZHEN MUNICIPAL DESIGN & RES INST
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