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Composite test material with light transmittance changing along with humidity as well as preparation method and application of composite test material

A technology of humidity change and light transmittance, applied in the direction of transmittance measurement, etc., can solve the problems of inability to accurately obtain the water content inside the cable, unable to meet the demand, etc., and achieve the effect of facilitating mass production, good market prospects, and accurate judgment.

Active Publication Date: 2020-12-22
中电保力(北京)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this patent can only qualitatively judge the internal moisture content of the cable, and cannot accurately obtain the internal moisture content of the cable. For some situations that need to know the specific moisture content, the patented materials and methods cannot meet the demand.

Method used

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  • Composite test material with light transmittance changing along with humidity as well as preparation method and application of composite test material
  • Composite test material with light transmittance changing along with humidity as well as preparation method and application of composite test material
  • Composite test material with light transmittance changing along with humidity as well as preparation method and application of composite test material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 40 parts of hydroxyl-modified acrylic water-absorbing resin (weight-average molecular weight of 50000, hydroxyl value of 65 mg KOH / g, vinyl content of 1.9 wt%), 10 parts of polyurethane acrylic resin, 15 parts of vinyl MQ silicone resin (vinyl content of 3.3 wt%, viscosity 5600mPa s), 1 part of diisononyl phthalate, 3 parts of melamine phosphate and 150 parts of acetone to prepare a uniform dispersed phase, and add 0.05 parts of azobisisobutyronitrile under stirring conditions, Heat to 110°C and react for 6 hours to obtain a mixed resin; after infrared testing, the carbon-carbon double bond basically disappears, indicating that the polymerization reaction is sufficient; then 6 parts of ultrafine calcium carbonate and 3 parts of aluminum hydroxide are ground and put into the above mixed resin, fully After stirring for 1 hour, vacuum drying was carried out in a vacuum oven at 150° C. for 3 hours in a vacuum environment of 0.1 MPa to obtain a composite test material.

Embodiment 2

[0042] Other conditions and steps are the same as in Example 1, except that the hydroxyl group content of the hydroxyl-modified acrylic water-absorbing resin is 93 mg KOH / g, and the vinyl content is 1.2 wt %; the vinyl content of the vinyl MQ silicone resin is 4.6 wt %, and the viscosity is 4500 mPa. s.

Embodiment 3

[0044] Other conditions and steps are the same as in Example 1, except that the hydroxyl group content of the hydroxyl-modified acrylic water-absorbing resin is 82 mg KOH / g, and the vinyl content is 1.3 wt%.

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Abstract

The invention provides a composite test material with light transmittance changing along with humidity as well as a preparation method and application of the composite test material. The composite test material is prepared from the following raw materials: hydroxyl modified acrylic resin, polyurethane acrylic resin, an inorganic color developing agent, a plasticizer, filler, a flame retardant andan initiator. The composite test material provided by the invention can be used for conveniently preparing a solution, and the solution coats a plastic sheet with high light transmittance, so the water content in a cable can be conveniently tested according to the light transmittance. The linear relation between the light transmittance and the humidity of the test environment is good, and R2 is 0.96 or above. After the sheet is placed for a period of time, the sheet is dried again, and the relation curve of the light transmittance and the humidity is still in a good linear relation. The composite test material provided by the invention can be formed through vacuum drying after a heating reaction or extrusion. The preparation method is simple in process, low in cost and convenient for industrial large-scale production, and has good market prospects.

Description

technical field [0001] The invention belongs to the field of polymer composite materials, and in particular relates to a composite test material whose light transmittance changes with humidity, a preparation method and application thereof. Background technique [0002] Our country is a big power country, and the cable is made of one or more mutually insulated conductors covered with an insulating layer and a protective layer, and is used to transmit electricity or information from one place to another. Usually overhead cables or underground cables. Cables have very high requirements for waterproof and moisture-proof. Once the cable is flooded and damp, it will gradually form water branch discharge under the action of high-voltage electromagnetic field, destroying the main insulation, until the breakdown discharge. Therefore, the quality assurance of cable construction and laying is very important for the reliable operation of cables in the future; the water ingress of power...

Claims

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Application Information

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IPC IPC(8): C08L33/04C08L75/14C08L83/07C08K13/02C08K5/12C08K5/3492C08K3/26C08K3/22G01N21/59
CPCC08L33/04G01N21/59C08L2205/03C08K2003/265C08K2003/2227C08L75/14C08L83/04C08K13/02C08K5/12C08K5/34928C08K3/26C08K3/22
Inventor 王宏伟袁振王少华王宇川张海凤
Owner 中电保力(北京)科技有限公司
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