Direct current cable insulating material added with rare earth nanoparticles and preparation method for direct current cable insulating material
A nano-rare earth and DC cable technology, applied in the direction of insulators, organic insulators, plastic/resin/wax insulators, etc., can solve problems such as limiting the voltage level and service life of DC cables, accelerating the aging rate of materials, and accelerating the electrical aging of insulating materials. , to achieve the effect of improving space charge accumulation characteristics, inhibiting space charge accumulation, and increasing melting temperature
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[0042] Example 1:
[0043] In this embodiment, the DC cable insulation material added with nano-rare earth particles includes 96 parts by mass of low-density polyethylene (LDPE), 1 part of modified MgO nanoparticles, and 2 parts of dicumyl peroxide ( DCP) and 1 part of tetra[3-(3,5-di-tert-butyl-4 hydroxyphenyl) propionic acid] pentaerythritol ester (1010 for short); among them, the modified MgO nanoparticles are made of aminopropylamino Ethyl trimethoxysilane (NC 6 H 5 -γ-NH 2 -(CH 2 ) 3 -Si-(OCH 3 ) 3 ) It is obtained by modifying MgO nanoparticles with a particle size in the range of 0.3nm-10μm, and the mass ratio of MgO nanoparticles to aminopropylaminoethyltrimethoxysilane is 0.3:1.
[0044] The preparation method of the DC cable insulation material added with nano-rare earth particles in this embodiment includes the following steps:
[0045] 1) According to mass parts, weigh 96 parts of low-density polyethylene (LDPE), 1 part of modified MgO nanoparticles, 2 parts of dicumyl p...
Example Embodiment
[0050] Example 2:
[0051] In this embodiment, the DC cable insulation material added with nano-rare earth particles includes 93 parts of ethylene / vinyl acetate copolymer and 5 parts of modified TiO by mass parts. 2 Nanoparticles, 1 part of 2,5-dimethyl-2,5 di-tert-butylperoxyhexane (double 25) and 0.6 part of 1,1,3-tris(2-methyl-4-hydroxy- 5 tert-butyl phenyl) butane (CA for short); among them, the modified TiO2 nanoparticles are made of N-phenyl-γ-aminopropyltrimethoxysilane (NC 6 H 5 -γ-NH 2 -(CH 2 ) 3 -Si-(OCH 3 ) 3 ) For TiO with a particle size range of 0.3nm-10μm 2 Nano particles are modified, and TiO 2 The mass ratio of nanoparticles to N-phenyl-γ-aminopropyltrimethoxysilane is 0.4:0.7.
[0052] The preparation method of the DC cable insulation material added with nano-rare earth particles in this embodiment includes the following steps:
[0053] 1) According to mass parts, weigh out 93 parts of ethylene / vinyl acetate copolymer and 5 parts of modified TiO 2 Nanoparticles, 1 p...
Example Embodiment
[0058] Example 3:
[0059] In this embodiment, the DC cable insulation material with nano-rare earth particles added, by mass, includes 98 parts of ethylene / ethyl acrylate copolymer, 3 parts of modified nano-rare earth particles, and 1.4 parts of ferrite with a mass ratio of 2:5. A mixture of dicumyl hydrogen oxide (DBHP) and di-tert-butyl peroxide (DTBP) and 0.2 parts of 2,2-methine bis(4-methyl-6-tert-butylphenol) (abbreviated as 2246) ; Among them, the modified nano-rare earth particles are made of γ-aminopropyl triethoxysilane (γ-NH 2 (CH 2 ) 3 (C 2 H 5 ) 3 SiO 3 ) Modified nano-rare earth particles with a particle size ranging from 0.3nm-10μm, and the mass ratio of nano-rare earth particles to γ-aminopropyltriethoxysilane is 0.7:0.5, and the molar ratio of nano-rare earth particles is 2 :1 A mixture of CaO nanoparticles and MgO nanoparticles.
[0060] The preparation method of the DC cable insulation material added with nano-rare earth particles in this embodiment includes th...
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