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Sensitive material for tensile deformation test and preparation method thereof

A technology of tensile deformation and sensitive materials, applied in the direction of electric/magnetic solid deformation measurement, electromagnetic measurement devices, etc., can solve the problems of inconvenience, large error of dial gauge test method, inconvenient use, etc., and achieve cost reduction and cost reduction Ideal, good sensitive effect

Inactive Publication Date: 2010-12-15
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The dial gauge test method has a large error and is inconvenient to use; the strain gauge test method and the strain gauge electrical test method are generally used for deformation tests under small strains, and for larger deformation tests, other methods are generally required. Helper methods, also inconvenient

Method used

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  • Sensitive material for tensile deformation test and preparation method thereof
  • Sensitive material for tensile deformation test and preparation method thereof
  • Sensitive material for tensile deformation test and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment one, weigh by mass proportioning:

[0030] Liquid silicone rubber: 100 parts;

[0031] 0.2mm chopped chopped carbon fiber: 50 parts;

[0032] Conductive carbon black: 0 parts;

[0033] nano-SiO 2 : 0 copies;

[0034] Curing agent: 5.5 parts;

[0035] Coupling agent: 0.4 parts;

[0036] The production steps are as follows:

[0037] (1) Weigh 100 parts of liquid silicone rubber, 50 parts of 0.2mm chopped carbon fiber, 5.5 parts of curing agent (dibutyltin dilaurate) and 0.4 parts of coupling agent (KH -550);

[0038] (2) First add 100 parts of liquid silicone rubber into the mixer for stirring, and the stirring speed is about 1200r / min;

[0039] (3) Then slowly add 50 parts of 0.2mm chopped chopped carbon fibers, and continue to stir;

[0040] (4) After stirring for about 30 minutes, add 0.4 parts of coupling agent (KH-550) and 5.5 parts of curing agent in sequence, and continue stirring for 2 minutes;

[0041] (5) Put the mixed solution into a vacuum...

Embodiment 2

[0045] Embodiment two, weigh by mass proportioning:

[0046] Liquid silicone rubber: 100 parts;

[0047] 0.2mm chopped chopped carbon fiber: 35 parts;

[0048] Conductive carbon black: 1 part;

[0049] nano-SiO 2 : 1 copy;

[0050] Curing agent: 5.5 parts;

[0051] Coupling agent: 0.6 parts;

[0052] The production steps are:

[0053] (1) Weigh 100 parts of liquid silicone rubber, 35 parts of 0.2mm chopped carbon fiber, 5.5 parts of curing agent (dibutyltin dilaurate) and 0.6 parts of coupling agent (KH -550);

[0054] (2) First add 100 parts of liquid silicone rubber into the mixer for stirring, and the stirring speed is about 1500r / min;

[0055] (3) Then slowly add 1 part of conductive carbon black, then slowly add 35 parts of 0.2mm chopped carbon fiber, and continue stirring;

[0056] (4) After stirring for about 40 minutes, add 0.6 parts of coupling agent (KH-550) and 5.5 parts of curing agent in sequence, and continue stirring for about 3 minutes;

[0057] (5) P...

Embodiment 3

[0061] Embodiment three, weigh by mass proportioning:

[0062] Liquid silicone rubber: 100 parts;

[0063] 0.6mm chopped chopped carbon fiber: 10 parts;

[0064] Conductive carbon black: 0.5 part;

[0065] nano-SiO 2 : 2 copies;

[0066] Curing agent: 3 parts;

[0067] Coupling agent: 0.4 parts.

[0068] The production steps are:

[0069] (1) take by weight respectively 100 parts of liquid silicone rubber, 10 parts of 0.6mm chopped chopped carbon fiber, 3 parts of curing agent (dibutyltin dilaurate) and 0.4 part of coupling agent ( KH-550);

[0070](2) Add 100 parts of liquid silicone rubber into the mixer for stirring, and the stirring speed is about 1500r / min;

[0071] (3) Then slowly add 10 parts of 0.6mm chopped carbon fiber, then add 2 parts of nano-SiO 2 , continue stirring;

[0072] (4) After stirring for about 40 minutes, add 0.4 parts of coupling agent (KH-550) and 3 parts of curing agent (dibutyltin dilaurate) in sequence, and continue stirring for about 3 ...

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Abstract

The invention relates to a sensitive material for a tensile deformation test and a preparation method thereof. The method comprises the following steps of: stirring and mixing liquid-state silicon rubber, chopped carbon fiber, conductive carbon black, nano-SiO2, a curing agent and a coupling agent serving as raw materials at normal temperature and under normal pressure in turn; removing air bubbles by vacuumizing; and molding. The obtained sensitive material for the tensile deformation test has high flexibility and very small tensile modulus and does not affect the deformation of a test structure or a test material in a testing process; and simultaneously, the sensitive material has the advantages of high sensitivity, performance stability, simple preparation method, wide raw material source and low manufacturing cost.

Description

technical field [0001] The invention relates to a sensitive material and a preparation method thereof, in particular to a sensitive material suitable for tensile deformation testing and a preparation method thereof. Background technique: [0002] In many engineering fields, such as structural engineering, water conservancy engineering, traffic engineering, geotechnical engineering, and bridge engineering, there will be tensile deformations in materials or structures, and the monitoring of these deformations will directly relate to the safety of the project. At present, there are roughly several methods for testing tensile deformation, such as mechanical testing method, strain gauge testing method, and strain gauge electrical testing method. The instruments used are dial gauges, strain gauges, and strain gauges. [0003] The dial gauge test method has a large error and is inconvenient to use; the strain gauge test method and the strain gauge electrical test method are general...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08K13/04C08K7/06C08K3/36C08K3/04G01B7/16
Inventor 周国庆廖波赵光思梁恒昌刘卓典
Owner CHINA UNIV OF MINING & TECH
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