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A kind of semiconductive polymer composite material with low voltage dependence and its preparation method

A composite material and correlation technology, which is applied in the field of semi-conductive composite material preparation, can solve the problems of volume resistivity change, small resistance change degree, and not easy to solve, and achieve the effect of reducing volume resistivity and stabilizing resistance

Active Publication Date: 2021-02-19
广州德润橡胶制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, it is not easy to obtain a material with a small change in resistance and stable performance. In addition, the conductive mechanism is complex, and the rise and fall of the applied voltage will lead to changes in the conductive path, as well as factors such as durable dielectric loss, so that the volume resistivity Significant changes ensued, and it was not easy to resolve

Method used

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  • A kind of semiconductive polymer composite material with low voltage dependence and its preparation method
  • A kind of semiconductive polymer composite material with low voltage dependence and its preparation method

Examples

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Effect test

Embodiment 1

[0030] The preparation of the semiconductive polymer composite material of embodiment 1 low voltage dependence

[0031] Composition of raw materials 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 method: (1) Preparation of modified carbon black: carbon black is placed in a mixed acid solution composed of concentrated sulfuric acid and concentrated nitric acid, reflux reaction is carried out at 80°C for 6h, washed and dried Afterwards, acidified carbon black is obtained; then acidified carbon black is mixed with nano-titanium dioxide and then placed in absolute ethanol for ball milling for 5 hours, and the modified carbon black is obtained after removing ethanol and drying; (2) the modified carbon black prepared in step (1) Carbon black and methyl vinyl silicone rubber are melt-blended to obtain the conductive mast...

Embodiment 2

[0034] The preparation of the semiconductive polymer composite material of embodiment 2 low voltage dependence

[0035] Composition by weight of raw materials: 60 parts of methyl vinyl silicone rubber; 40 parts of EPDM rubber; 10 parts of conductive masterbatch; 2 parts of crosslinking agent DCP;

[0036] The conductive masterbatch is prepared by the following method: (1) Preparation of modified carbon black: carbon black is placed in a mixed acid solution composed of concentrated sulfuric acid and concentrated nitric acid, reflux reaction is carried out at 70 °C for 8 hours, washed and dried Afterwards, acidified carbon black is obtained; then acidified carbon black is mixed with nano-titanium dioxide and placed in absolute ethanol for ball milling for 6 hours, and the modified carbon black is obtained after removing ethanol and drying; (2) the modified carbon black prepared in step (1) Carbon black and methyl vinyl silicone rubber are melt-blended to obtain the conductive ma...

Embodiment 3

[0038] The preparation of the semiconductive polymer composite material of embodiment 3 low voltage dependence

[0039] Composition 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 method: (1) Preparation of modified carbon black: carbon black is placed in a mixed acid solution composed of concentrated sulfuric acid and concentrated nitric acid, reflux reaction is carried out at 90°C for 5h, washed and dried Afterwards, acidified carbon black is obtained; then acidified carbon black is mixed with nano-titanium dioxide and then placed in absolute ethanol for ball milling for 5 hours, and the modified carbon black is obtained after removing ethanol and drying; (2) the modified carbon black prepared in step (1) Carbon black and methyl vinyl silicone rubber are melt-blended to obtain the conductive mas...

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Abstract

The invention relates to the technical field of preparation of semiconductive composite materials, and specifically provides a low voltage correlation semiconductive polymer composite material and a preparation method thereof. The composite material is made of raw materials containing the following parts by weight: 50-90 parts of methyl vinyl silicone rubber; 10-50 parts of EPDM rubber; 10-20 parts of conductive masterbatch; 1-5 parts of crosslinking agent share. The volume resistivity of the low-voltage-dependent semiconducting polymer composite is in the range of 0.32*10 6 ~0.47*10 6 Ω·cm is in the semiconducting region (ie about 10 5 ~10 9 Ω·cm) range, and its resistance is very stable, in the high temperature and high humidity environment, there is no leakage of chemical substances that pollute the photosensitive drum.

Description

technical field [0001] The invention relates to the technical field of semiconductive composite material preparation, in particular to a semiconductive polymer composite material with low voltage correlation and a preparation method thereof. Background technique [0002] In recent years, office equipment such as laser printers and laser all-in-one machines using the imaging principle of electronic imaging (electrophotography) have been popularized and used on a large scale. Semi-conductive rubber products such as charging roller (PCR), developing roller (DVR), transfer roller, cleaning roller, and transfer belt are used as key components, and cooperate with photosensitive drum, toner, and magnetic roller to form a commonly used A toner cartridge called a "cartridge". [0003] Since the charging roller, developing roller and photosensitive drum are in direct contact, the precious elasticity unique to the rubber material in the polymer material makes it the best choice. In o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/07C08L23/16C08K9/02C08K3/04C08K3/22C08K5/14
CPCC08K2003/2241C08K2201/001C08K2201/011C08L83/04C08L23/16C08K9/02C08K3/04C08K3/22C08K5/14
Inventor 曾昭宇何华明梁剑春刘兰香
Owner 广州德润橡胶制品有限公司
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