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Systems and methods for carbon fiber alignment and fiber-reinforced composites

A composite material and carbon fiber technology, applied in applications, clothing, footwear, etc., can solve problems such as increasing material costs and not being suitable for manufacturing applications

Pending Publication Date: 2021-07-30
BOSTON MATERIALS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, magnetic particles can add to the cost of these materials, potentially making them unsuitable for certain cost-sensitive manufacturing applications

Method used

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  • Systems and methods for carbon fiber alignment and fiber-reinforced composites
  • Systems and methods for carbon fiber alignment and fiber-reinforced composites
  • Systems and methods for carbon fiber alignment and fiber-reinforced composites

Examples

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example 1

[0093] This example shows that discontinuous reinforcing fibers can exhibit excellent strength and modulus when they are oriented in the direction of load. Additionally, discontinuous fibers can provide cost savings compared to their smaller or equal strength continuous counterparts. Orientation is important, however, because both discontinuous and continuous fibers have significantly reduced tensile properties as they approach tangent to stress. see figure 1 , schematically showing the relationship between fiber orientation and principal stress directions in carbon fibers.

[0094] Proper orientation of the fibers in the direction of the load can be used to ensure efficient load transfer from the matrix to the reinforcing fibers. The load imposed on the composite material can be distributed between the matrix and the fiber reinforcement. The strain difference between the matrix and the reinforcing fibers may generate shear stress at their interface. This shear mechanism f...

example 2

[0099] In this example, ground PAN-based carbon fibers (150 micron length) were randomly distributed in water and observed under a microscope. this is in Figure 5A shown in .

[0100] The same sample was agitated and placed under a rare earth permanent magnet with a surface magnetic field strength ranging from 0.1 T to 0.3 T. It was observed that the ground carbon fibers became vertically aligned under the applied magnetic field. Just to clarify, these milled carbon fibers do not contain any surface coatings. The samples were observed under a microscope while exposing them to a magnetic field. Vertically aligned image of milled carbon fiber in water at Figure 5B is shown in , which shows that some alignment occurs.

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Abstract

The present invention generally relates to fiber-reinforced composites, including carbon-fiber composites. These materials are useful in load-bearing components for mechanical systems, and other applications. Surprisingly, the carbon fibers can be aligned using an applied magnetic field applied directly to the carbon fibers, rather than to magnetic materials that are used to indirectly align the carbon fibers. For example, the carbon fibers may exhibit an anisotropic diamagnetic response in response to a magnetic field, which can be used to align the fibers. In some cases, the carbon fibers may be relatively pure, and / or have a relatively high modulus, which may result in diamagnetic properties. Other embodiments are generally directed to systems and methods for making or using such composites, kits involving such composites, or the like.

Description

[0001] related application [0002] This application claims U.S. Provisional Patent Application Serial No. 62, entitled "Systems and Methods for Carbon Fiber Alignment and Fiber-Reinforced Composites," filed December 10, 2018 / 777,438, which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates generally to fiber reinforced composite materials, including carbon fiber composite materials. Background technique [0004] Fiber-reinforced composite materials (eg, carbon fiber composites) are characterized by a generally planar assembly of reinforcing fibers (eg, carbon fibers) formed as woven or non-woven textile layers. These layers provide mechanical, thermal and electrical properties in the direction of the strong axis of the reinforcing fibers (e.g., in-plane), but do not perform well when a load is applied transverse to the fibers (e.g., through-thickness). weakened. The most commonly used ply materials include a plana...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A43B5/14B29C69/00B29C70/84
CPCB29C70/84B29C70/88B29C70/14B29C70/081B29C70/228B29C70/543C08J5/042
Inventor 罗伯特·莫内安维什·古里亚拉
Owner BOSTON MATERIALS INC