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Evaluation method for self-healing performance of cable insulation material

A technology of cable insulation and evaluation method, applied in the direction of analyzing materials, measuring devices, instruments, etc., can solve the problems of low accuracy of evaluation results, and achieve the effects of enhancing self-healing performance, low cost, and simple operation

Active Publication Date: 2018-09-04
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention proposes a method for evaluating the self-healing performance of cable insulation materials, aiming to solve the problem of low accuracy of the evaluation results obtained by using the existing evaluation methods for the performance of healing materials

Method used

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  • Evaluation method for self-healing performance of cable insulation material
  • Evaluation method for self-healing performance of cable insulation material
  • Evaluation method for self-healing performance of cable insulation material

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Experimental program
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preparation example Construction

[0029] (1) Preparation of sample Take a section of cable insulation material and make it into several sample-shaped samples with a certain shape; for example, the cable insulation material can be cut into strip-shaped multiple samples, preferably, can be Cut into 33 samples of 30×5×1 mm long strip structure.

[0030] (2) Measurement of the cross-sectional area of ​​the sample wound before and after self-healing: each of the samples is destroyed, and the initial cross-sectional area S0 of the wound of each of the samples is measured, and each of the samples is self-healed Measure the healing cross-sectional area S1 of each described sample wound afterward; (3) determination of self-healing efficiency: the self-healing efficiency η of each described sample is determined respectively, wherein; S0-S1 is each described The change value of the cross-sectional area of ​​the wound before and after the sample self-healing, and determine the self-healing efficiency of the cable insulati...

Embodiment 1

[0047] After the sample was cut off, the two ends of the wound were brought into contact with each other, and the initial cross-sectional area of ​​the wound was determined to be 7282 μm by laser confocal microscope 2 After waiting 2 hours at room temperature, the initial cross-sectional area of ​​the wound after self-healing was measured by laser confocal microscope: 88 μm 2 , the self-healing efficiency η1 is 98.79%.

Embodiment 2

[0049] After the sample 2 was cut off, the two ends of the wound were brought into contact with each other, and the initial cross-sectional area of ​​the wound was determined to be 7489 μm by laser confocal microscope 2 , after waiting 2 hours at room temperature, the initial cross-sectional area of ​​the self-healing wound was determined to be 96 μm by laser confocal microscope 2 , the self-healing efficiency η2 is 98.72%

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Abstract

The invention provides an evaluation method for self-healing performance of a cable insulation material. According to the evaluation method for the self-healing performance of the cable insulation material provided by the invention, cutting pretreatment is performed on the cable insulation material, the cross section area of a wound before and after self-healing of a sample is measured by a laserscanning confocal microscope, and finally the self-healing efficiency of the material is calculated, so that the evaluation method is simple in operation and low in cost, the self-healing performanceof the material can be reflected intuitively, the work efficiency of self-healing evaluation is improved, and the evaluation method is beneficial for establishing a test specification for evaluating the self-healing efficiency based on a laser scanning confocal microscope method; therefore, the cable insulation material can be optimized and improved according to the evaluation result of the self-healing cable so as to enhance the self-healing performance of the insulation material.

Description

technical field [0001] The invention relates to the technical field of chemical materials, in particular to a method for evaluating the self-healing performance of cable insulating materials. Background technique [0002] Self-healing is the ability of the material itself to judge, control and repair defects by itself without external force. Self-healing polymer materials have the following characteristics: 1) specific site, strong pertinence, and high efficiency; 2) automation. No need for human observation, saving monitoring costs; 3) Improve material life; 4) Eliminate material maintenance costs. [0003] The development of self-healing cable insulation materials is a major breakthrough in the existing fault repair methods, which is beneficial to prolong the life of materials and save the cost of power grid construction and operation and maintenance. The self-healing performance of cable insulation materials means that it does not rely on fault location technology, does...

Claims

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Application Information

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IPC IPC(8): G01N33/00G01B11/28
CPCG01B11/28G01N33/00
Inventor 林木松陈天生付强彭磊张晟郑重马晓茜潘君镇
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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