Low voltage related semi-conductive polymer composite material and preparation method thereof
A composite material and correlation technology, applied in the field of semi-conductive composite material preparation, can solve the problems of volume resistivity change, small resistance change, complex conduction mechanism, etc., to achieve the effect of stable resistance and reducing volume resistivity
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Embodiment 1
[0030] Example 1 Preparation of semi-conductive polymer composite material with low voltage dependence
[0031] Raw material parts by weight: 70 parts of methyl vinyl silicone rubber; 30 parts of EPDM rubber; 15 parts of conductive masterbatch; 3 parts of crosslinking agent DCP;
[0032] The conductive masterbatch is prepared by the following methods: (1) Preparation of modified carbon black: the carbon black is placed in a mixed acid solution composed of concentrated sulfuric acid and concentrated nitric acid, refluxed at 80°C for 6 hours, washed and dried Then the acidified carbon black is obtained; then the acidified carbon black is mixed with nano-titanium dioxide and then placed in absolute ethanol for ball milling for 5 hours, the ethanol is removed and dried to obtain the modified carbon black; (2) the modified carbon black prepared in step (1) Carbon black and methyl vinyl silicone rubber are melt-blended to obtain conductive masterbatch; wherein, in step (1), the amount ra...
Embodiment 2
[0034] Example 2 Preparation of semi-conductive polymer composite material with low voltage dependence
[0035] Raw material parts by weight: 60 parts of methyl vinyl silicone rubber; 40 parts of EPDM rubber; 10 parts of conductive masterbatch; 2 parts of cross-linking agent DCP;
[0036] The conductive master particles are prepared by the following methods: (1) Preparation of modified carbon black: the carbon black is placed in a mixed acid solution composed of concentrated sulfuric acid and concentrated nitric acid, refluxed at 70°C for 8 hours, washed and dried Then the acidified carbon black is obtained; then the acidified carbon black is mixed with nano-titanium dioxide and then placed in absolute ethanol for ball milling for 6 hours, the ethanol is removed and dried to obtain the modified carbon black; (2) the modified carbon black prepared in step (1) Carbon black and methyl vinyl silicone rubber are melt-blended to obtain conductive masterbatch; wherein, the amount ratio of...
Embodiment 3
[0038] Example 3 Preparation of low-voltage-dependent semi-conductive polymer composite material
[0039] Ingredients in parts by weight of raw materials: 50 parts of methyl vinyl silicone rubber; 50 parts of EPDM rubber; 20 parts of conductive masterbatch; 5 parts of crosslinking agent DCP;
[0040] The conductive masterbatch is prepared by the following methods: (1) Preparation of modified carbon black: the carbon black is placed in a mixed acid solution composed of concentrated sulfuric acid and concentrated nitric acid, refluxed at 90°C for 5 hours, washed and dried Then the acidified carbon black is obtained; then the acidified carbon black is mixed with nano-titanium dioxide and then placed in absolute ethanol for ball milling for 5 hours, the ethanol is removed and dried to obtain the modified carbon black; (2) the modified carbon black prepared in step (1) Carbon black and methyl vinyl silicone rubber are melt-blended to obtain conductive masterbatch; wherein, the amount ra...
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