An insulating material capable of automatically repairing electrical breakdown damage and a preparation method thereof
An insulating material and automatic repair technology, applied in the direction of insulators, organic insulators, plastic/resin/wax insulators, etc., can solve problems such as breakdown, low resistance of polyolefin microporous membranes, loss of insulation performance, etc.
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Embodiment 1
[0020] Example 1: Synthesis example of supramolecular polymer
[0021] Combine 42.1g of dimer acid (80% of dimer content and 12% of trimer content) with 17.3g of diethyltriamine (DETA), and 1% of silicon dioxide (SiO 2 ) The powder was added to a 150mL three-necked flask and kept stirring at 1500rpm for 12h, and N was continuously introduced during the reaction. 2 . After the reaction, the reaction temperature was lowered to 130° C., 0.2 g of urea was added to the three-necked flask, and stirring was continued for 30 minutes at a speed of 1500 rpm to obtain a self-healing polymer.
Embodiment 2
[0022] Example 2: Example of blend preparation
[0023] Firstly, a polyolefin film with a thickness of about 20-50 microns and a through hole of 10-100 microns in the thickness direction is prepared by biaxial stretching; and then the self-healing polymer prepared in Example 1 is poured into the polyolefin film by a reduced pressure method. In the through holes of the olefin film, carefully remove the self-healing polymer remaining on the surface of the polyolefin film, and obtain a composite insulating film after drying. The resulting insulating film composite structure is as figure 2 Shown.
Embodiment 3
[0024] Example 3: Example of insulation strength test
[0025] This embodiment is a method for testing the insulation performance of the composite film. The insulation material prepared according to the test method of the present invention is subjected to a breakdown test, and the DC insulation strength of the material is tested by a withstand voltage tester. The result shows that the insulation strength of the obtained composite insulation film is higher than 200 MV / m.
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Abstract
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