Mother stock of polyvinyl carbon nanotube anti-static composite material and anti-static composite material based on mother stock

A technology of carbon nanotubes and composite materials, applied in the field of antistatic composite material masterbatch and antistatic composite materials, to achieve the effect of comprehensive mechanical properties and good antistatic performance

Inactive Publication Date: 2005-09-21
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Existing studies have shown that the toughness of polyethylene/carbon nanotube composites can be greatly improved by adding EP

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0046] Example 1

[0047] 1. Surface modification treatment of carbon nanotubes (CNTs)

[0048] (1) Nitric acid oxidation treatment

[0049] Place the original ecological CNTs in an oven at 100°C and dry for 120 minutes. The dried CNTs are mixed with nitric acid with a concentration of 3.0 mol / L in a mass ratio of 1:3, and heated to reflux under the action of a stirrer. The treatment temperature is 120° C., and the treatment time is 10 hours. Take out the processed material, wash it repeatedly with distilled water to PH=7, and put it in an oven at 100°C for drying.

[0050] (2) Ball milling treatment

[0051] First, the coupling agent is configured into a 10 wt% ethanol solution, and acetic acid is added dropwise to adjust the pH value of the solution to 3.5-5.5.

[0052] The CNTs obtained by the treatment (1) are uniformly mixed with the above coupling agent-ethanol solution at a mass ratio of 1:4, and the obtained slurry is ball milled in a planetary ball mill for 10 minutes at ...

Example Embodiment

[0081] Example 2:

[0082] As in the preparation method described in Example 1, the process parameters are changed as follows:

[0083] 1. Surface modification treatment of carbon nanotubes (CNTs)

[0084] Nitric acid concentration: 4mol / L

[0085] Acid treatment temperature: 100℃

[0086] Acid treatment time: 18h

[0087] Ball milling time: 20min

[0088] Speed ​​of ball mill: 300r / min

[0089] 2. Solution blending

[0090] Formula ratio-polyethylene: CNTs: compatibilizer: coupling agent: BHT = 100: 25: 20: 8: 0.02

[0091] Compatibilizer: MAH-g-PE, the grafting rate is 1.2%

[0092] Coupling agent: vinyl trimethoxy silane

[0093] 3. Melt blending

[0094] Formula ratio--mixing material: EPDM: crosslinking agent: auxiliary crosslinking agent=100:60:0.08:0.6

[0095] Crosslinking agent: DCP

[0096] Co-crosslinking agent: DAP

[0097] PE: Masterbatch = 100: 15

Example Embodiment

[0098] Example 3:

[0099] As in the preparation method described in Example 1, the process parameters are changed as follows:

[0100] 1. Surface modification treatment of carbon nanotubes (CNTs)

[0101] Nitric acid concentration: 2mol / L

[0102] Acid treatment temperature: 140℃

[0103] Acid treatment time: 24h

[0104] Ball milling time: 5min

[0105] Speed ​​of ball mill: 400r / min

[0106] 2. Solution blending

[0107] Formula ratio-polyethylene: CNTs: compatibilizer: coupling agent: BHT = 100: 8: 25: 4: 0.08

[0108] Compatibilizer: MAH-g-PE, grafting rate is 1%

[0109] Coupling agent: vinyl trimethoxy silane

[0110] 3. Melt blending

[0111] Formula ratio--mixture: EPDM: cross-linking agent: auxiliary cross-linking agent = 100: 45: 0.04: 0.2

[0112] Crosslinking agent: DIP

[0113] Co-crosslinking agent: GM

[0114] PE: Masterbatch = 100: 20

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PUM

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Abstract

The invention relates to an anti-static modified material with carbon nanotubes (CNTs) predominantly and a process which is a thermal oxidation treatment with acid together with a ball grinding surface treatment to CNTs and comprises: adding maleic anhydride grafted polyethylene, coupling agents and EPT rubber to prepare the high concentration masterbatch of CNTs/PE anti-static composite material by solution blending and melt blending methods, mixturing the said masterbatch with common PE in a finite proportion to melt blend and prill, then getting the final CNTs/PE anti-static composite material. The electrical surface resistivity and volume resistivity can reach the operating requirements of the anti-static material when the content of CNTs is only 0.3 wt % in the CNTs/PE anti-static composite material in the invention.

Description

technical field [0001] The present invention relates to an antistatic composite material masterbatch and an antistatic composite material based on the masterbatch, specifically, polyethylene with carbon nanotubes (CNTs) as the main antistatic modification material and polyethylene as the main modification object Carbon nanotube based antistatic composite material and its masterbatch. Background technique [0002] Due to its low price, excellent performance, and easy processing, polyethylene has been widely used in various fields such as packaging, daily necessities, chemicals, automobiles, and medical treatment, and has become one of the most widely used plastics. For example, polyethylene has excellent electrical properties, which makes it widely used in electrical insulation materials, but it is precisely because of its electrical insulation that it has defects in chemical pipelines, containers, films, etc. It is easy to generate static charge when rubbing or peeling off ...

Claims

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Application Information

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IPC IPC(8): C08K3/04C08K9/00C08L23/06
Inventor 钱琦吴唯黄祖雄刘敏
Owner EAST CHINA UNIV OF SCI & TECH
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