Carbon nanotube / polylactic acid conductive composite material and preparation method thereof

A technology of conductive composite materials and carbon nanotubes, which is applied in the field of polymer materials, can solve the problems of weak interfacial force, unfavorable material mechanical properties, poor interfacial interaction, and low chemical activity, and achieve low cost, huge application potential, and high processing efficiency. The effect of simple process conditions

Active Publication Date: 2016-02-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low chemical activity of carbon nanotubes and the poor interface interaction with the material matrix, multi-phase blending in multi-component composite materials can obtain composite materials with better electrical properties, but the interfacial force between carbon nanotubes and the matrix is ​​weak. Not conducive to the mechanical properties of the material

Method used

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  • Carbon nanotube / polylactic acid conductive composite material and preparation method thereof
  • Carbon nanotube / polylactic acid conductive composite material and preparation method thereof
  • Carbon nanotube / polylactic acid conductive composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Preparation of modified carbon nanotube conductive powder: Add 5.0 g of multi-walled carbon nanotubes into 500 mL of deionized water and magnetically stir for 5 minutes (Shanghai Jingke, 90-2 constant temperature and timing magnetic stirrer), and then add surfactant dodecane Continue stirring for 10 min after sodium dodecylbenzenesulfonate, wherein the weight ratio of sodium dodecylbenzenesulfonate to carbon nanotubes is 1.0:1.0; the resulting mixed solution is ultrasonically homogenized (Shanghai Shengxi Ultrasonic Instrument Co., Ltd., FS1200) Treat for 60 minutes to obtain a carbon nanotube dispersion. The carbon nanotube dispersion was centrifuged at 10,000 r / min for 5 minutes, the supernatant was removed, the precipitate was washed three times with deionized water, and dried at 60° C. for 12 hours to obtain a modified carbon nanotube conductive powder. According to scanning electron microscopy (USA FEI company, NanoSEM450), the calculated thickness of the modified ...

Embodiment 2

[0058] Preparation of modified carbon nanotube conductive powder: Add 5.0 g of multi-walled carbon nanotubes into 500 mL of deionized water and magnetically stir for 5 min, then add the surfactant sodium dodecylbenzene sulfonate and continue stirring for 10 min, in which dodecyl The weight ratio of sodium phenylsulfonate to carbon nanotubes is 3.0:1.0; the obtained mixed solution is ultrasonically homogenized for 60 minutes to obtain a carbon nanotube dispersion. The obtained carbon nanotube dispersion was centrifuged at 10,000 r / min for 5 minutes, the supernatant was removed, the precipitate was washed three times with deionized water, and dried at 60° C. for 12 hours to obtain a modified carbon nanotube conductive powder. The thickness of the modified carbon nanotube outer wall modification layer in the modified carbon nanotube conductive powder is about 5nm, and the weight of the surfactant sodium dodecylbenzene sulfonate accounts for 18.8% of the total weight of the modifie...

Embodiment 3

[0062] Preparation of modified carbon nanotube conductive powder: Add 5.0 g of multi-walled carbon nanotubes into 500 mL of deionized water and magnetically stir for 5 min, then add the surfactant sodium dodecylbenzene sulfonate and continue stirring for 10 min, in which dodecyl The weight ratio of sodium phenylsulfonate to carbon nanotubes is 3.0:1.0; the obtained mixed solution is ultrasonically homogenized for 60 minutes to obtain a carbon nanotube dispersion. The obtained carbon nanotube dispersion was centrifuged at 10,000 r / min for 5 minutes, the supernatant was removed, the precipitate was washed three times with deionized water, and dried at 60° C. for 12 hours to obtain a modified carbon nanotube conductive powder. The thickness of the modified carbon nanotube outer wall modification layer in the modified carbon nanotube conductive powder is about 5nm, and the weight of the surfactant sodium dodecylbenzene sulfonate accounts for 18.8% of the total weight of the modifie...

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Abstract

The present invention relates to the field of polymer materials, and further relates to a carbon nanotube / polylactic acid conductive composite material and a preparation method thereof. The carbon nanotube / polylactic acid conductive composite material contains the following groups in blending: 100 parts by weight of polylactic acid and 0.5-10 parts by weight of a modified carbon nanotube conductive powder; the material can also include 0.2-4.0 parts by weight of a non-ion surface active agent, can also further comprise 0.03-0.05 part by weight of an antioxidant. The method of the invention is simple in operation process and suitable for continuous mass production. The obtained carbon nanotube / polylactic acid conductive composite material has good carbon nanotube dispersion, improved aggregation phenomena, good anti-antistatic and conductive properties, and biodegradability and biological compatibility, and can be applied to the fields of electronics, communication and bio-engineering.

Description

technical field [0001] The invention relates to the field of polymer materials, and more specifically, relates to a carbon nanotube / polylactic acid conductive composite material and a preparation method thereof. Background technique [0002] Polymer materials are usually widely used as insulating materials in the electrical industry, installation engineering, communication engineering, etc. Due to the poor conductivity of general polymer materials, there are some problems that need to be solved in processing and application, the most prominent is the electrostatic phenomenon, It makes polymer products have potential hidden dangers of catastrophic accidents in flammable and explosive places, and for example causes the performance of photosensitive films to decline. In addition, in order to resist electromagnetic interference and emissivity interference, the shielding performance of materials also needs to be solved. These are all Polymer materials are required to have new con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08K9/04C08K7/24C08K3/04
Inventor 张琦张师军张丽英权慧郭鹏初立秋
Owner CHINA PETROLEUM & CHEM CORP
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