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Nanotube and finely milled carbon fiber polymer composite compositions and methods of making

一种复合材料、组合物的技术，应用在纳米结构制造、纳米碳、碳化合物等方向，能够解决较差特性等问题，达到高碳负荷水平的效果

Active Publication Date: 2014-06-04
ENTEGRIS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] Hirai et al. (US Pat. No. 5,227,238) discuss that carbon fiber reinforced thermoplastics prepared by using milled fibers with extremely short fiber lengths have poorer properties than those made by using carbon fiber cut tow due to the short length of the milled fibers

Method used

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  • Nanotube and finely milled carbon fiber polymer composite compositions and methods of making
  • Nanotube and finely milled carbon fiber polymer composite compositions and methods of making
  • Nanotube and finely milled carbon fiber polymer composite compositions and methods of making

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Embodiment 1

[0120] Multi-walled carbon nanotubes (MWNTs) were used as received without modification or purification. MWNTs mainly exist as monomers of different sizes. Carbon fibers from a supplier with a diameter of about 7 microns, a length of about 150 microns, and an aspect ratio greater than 20 were pulverized until the aspect ratio was greater than 1 and less than about 5. The feed rate of MWNTs and finely ground carbon fibers was shear mixed with thermoplastic PEEK at about 355 °C in a co-rotating intermeshing twin-screw extruder (length 95 cm, L / D 38-42) to obtain a concentration in PEEK of about 1.25 wt% MWNTs and 35 wt% finely ground carbon fibers. Compounding was performed using multiple heating zones with barrel temperatures ranging from about 350°C to about 370°C. A torque of about 260 to about 360 Newton-meters is applied to the twin screws. Polymers, MWNTs and finely ground carbon fibers are mixed through the extruder's screws. No additives or dispersants are used. The...

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Abstract

Embodiments of the present invention include composite compositions extrusion compounded together comprising a polymer, an amount of nanotubes, and an amount of finely milled carbon fiber having an aspect ratio greater than 1 and less than about 5. The resulting composite materials allow for high carbon loading levels with improved tribological properties including coefficient of friction and wear rates, provides uniform surface resistance with minimal processing sensitivity, retains rheological properties similar to the base resin, and provides isotropic shrink and a reduced coefficient of thermal expansion leading to minimal warp. In general, various articles can be formed that take advantage of the properties of the composite materials incorporating a polymer, carbon nanotubes and finely milled carbon fiber.

Description

[0001] related application [0002] This application claims the benefit of US Provisional Patent Application No. 61 / 510,352, filed June 21, 2011, the entire disclosure of which is incorporated herein by reference. technical field [0003] The present invention generally relates to a composition comprising one or more polymers, carbon nanotubes and finely ground carbon fibers. In particular, in certain aspects, the invention relates to compositions having a polymer and an amount of carbon nanotubes and an amount of finely ground carbon fibers dispersed in the polymer, the finely milled carbon fibers having an aspect ratio greater than 1 and less than 5. Moreover, this invention relates to the manufacturing method of this composition. Furthermore, the invention relates to articles made from the composition, such as containers or functional articles. Background technique [0004] The development of technology has higher and higher requirements on the material performance of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K3/04C08J3/20C08J5/00C01B31/02C08L79/08B82B3/00
CPCC01B2202/34C08G73/1046C08J3/201B82Y30/00C08K9/00C08G69/40C08L79/08C08K7/24C08L77/06C08K7/06C08J5/10C01B2202/36C08J5/042C08K2201/011C08K2201/016C08K3/04C08K3/041Y10T428/1372
Inventor 杰弗里·A·加洛韦
Owner ENTEGRIS INC
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