Natural rubber composite with electromagnetic shielding property and preparation method thereof

A technology of natural rubber and composite materials, applied in the field of electromagnetic shielding materials, can solve problems such as unsuitable for large-scale popularization and application, high manufacturing cost, complicated process, etc., and achieve excellent electromagnetic wave absorption performance, low manufacturing cost, and simple preparation method.

Inactive Publication Date: 2011-08-03
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there are generally problems such as high manufacturing cost, complicated proc

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0017] Example 1

[0018] Fully disperse the chopped carbon fiber in a beating machine, filter the dispersion and fully dry it to obtain a chopped dispersed carbon fiber monofilament with a fiber diameter of 3μm and a length of 1mm; in an internal mixer or mill, first 100 parts by weight of natural rubber are masticated for 5 minutes, and then 2 parts stearic acid, 5 parts zinc oxide, 1 part antioxidant, 60 parts carbon black, 3 parts chopped carbon fiber, 3 parts paraffin oil, 1 part Parts accelerator and 2.5 parts sulfur, then mix for 8 minutes, mix evenly and press tablets to obtain a rubber mixture; park the rubber mixture at room temperature for 24 hours, and then vulcanize and shape on a 50T flat vulcanizer under a vulcanization condition of 140 ℃×30min, get the product.

[0019] After performance testing, the tensile strength of the electromagnetic shielding natural rubber composite material is 14MPa, and the electromagnetic shielding efficiency is 62.3-75.6dB under the con...

Example Embodiment

[0020] Example 2

[0021] Fully disperse the chopped carbon fiber in a beating machine, filter the dispersion and fully dry it to obtain a chopped carbon fiber monofilament with a fiber diameter of 6μm and a length of 3mm; in an internal mixer or mill, first 100 parts by weight of natural rubber are masticated for 5 minutes, and then 2 parts by weight of stearic acid, 5 parts of zinc oxide, 1 part of antioxidant, 60 parts of carbon black, 7 parts of chopped carbon fiber, 3 parts of paraffin oil, 1 part Parts accelerator and 2.5 parts sulfur, then mix for 8 minutes, mix evenly and press tablets to obtain a rubber mixture; park the rubber mixture at room temperature for 24 hours, and then vulcanize and shape on a 50T flat vulcanizer under a vulcanization condition of 140 ℃×30min, get the product.

[0022] After performance test, the tensile strength of the electromagnetic shielding natural rubber composite material is 15MPa, and the electromagnetic shielding efficiency is 68.2-82.4d...

Example Embodiment

[0023] Example 3

[0024] Fully disperse the chopped carbon fiber in a beating machine, filter the dispersion and fully dry it to obtain a chopped dispersed carbon fiber monofilament with a fiber diameter of 10μm and a length of 5mm; in an internal mixer or mill, first 100 parts by weight of natural rubber is masticated for 5 minutes, and then 2 parts by weight of stearic acid, 5 parts of zinc oxide, 1 part of antioxidant, 60 parts of carbon black, 11 parts of chopped carbon fiber, 3 parts of paraffin oil, 1 part Parts accelerator and 2.5 parts sulfur, then mix for 8 minutes, mix evenly and press tablets to obtain a rubber mixture; park the rubber mixture at room temperature for 24 hours, and then vulcanize and shape on a 50T flat vulcanizer under a vulcanization condition of 140 ℃×30min, get the product.

[0025] After performance test, the tensile strength of the electromagnetic shielding natural rubber composite material is 16MPa, and the electromagnetic shielding efficiency is...

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Abstract

The invention provides a natural rubber composite with an electromagnetic shielding property. The composite comprises natural rubber, a short carbon fiber and a compounding agent, wherein the diameter of the short carbon fiber is 3-10 mu m, the length of the short carbon fiber is 1-5 mm, and the weight ratio of the natural rubber to the short carbon fiber at room temperature is 100:(0.5-11). Because the physical and mechanical properties of the natural rubber and the short carbon fiber are fully used for preparing the composite with the electromagnetic shielding property, the composite has the good electromagnetic wave absorption property of the short carbon fiber and the good physical and mechanical properties of the rubber material, and can be adaptive to the requirement on various environments. The composite has the advantages that the electromagnetic shielding property is high, the preparation method is simple, the preparation cost is low, and the energy consumption is reduced.

Description

technical field [0001] The invention belongs to the field of electromagnetic shielding materials, specifically a natural rubber composite material with electromagnetic shielding performance and a preparation method thereof Background technique [0002] The electromagnetic interference generated by electromagnetic wave radiation will not only affect the normal operation of various electronic equipment, but also cause serious damage to the physical and mental health of people who have been exposed to electromagnetic wave radiation for a long time. Because polymer materials have good physical and mechanical properties, it is very necessary to develop electromagnetic shielding polymer materials with high electromagnetic shielding performance, low manufacturing cost, and simple preparation methods. The metal thin composite layer or coating of the surface conductive electromagnetic shielding polymer material is easy to peel off during use and processing, and its mechanical propert...

Claims

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Application Information

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IPC IPC(8): C08L7/00C08K7/06C08K3/04
Inventor 曾宪奎汪传生边慧光
Owner QINGDAO UNIV OF SCI & TECH
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