Carbon Nanotube Fiber Reinforcement by Void-Filling Carbon Precursors
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Carbon nanotube fibers exhibit suboptimal electrical conductivity, thermal conductivity, and mechanical properties due to their empty space, which limits their performance and potential applications.
Innovation Solution
Filling the empty space inside carbon nanotube fibers with a carbon precursor, stabilizing, and then carbonizing them to enhance mechanical and thermal properties through effective stress transfer and reduced contact resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If carbon nanotube fibers are used as-is, then they have basic structural integrity, but their electrical conductivity, thermal conductivity and mechanical properties are suboptimal due to empty space inside
Solution Approach 1:
The invention utilizes the porous/empty space structure of carbon nanotube fibers as a template to infiltrate and fill with carbon precursor materials. The empty spaces are intentionally exploited as receptacles for the carbon precursor, which then transforms into solid carbon to reinforce the fiber structure, converting the harmful porosity into a beneficial reinforcement mechanism.
Solution Approach 2:
The invention creates a composite structure by combining carbon nanotube fibers with carbon precursor materials. The carbon precursor fills the empty spaces within and between the nanotube bundles, forming a composite material where the carbon nanotubes provide structural framework and the infiltrated carbon provides additional reinforcement, resulting in enhanced mechanical and thermal properties.
2Strength
If carbon nanotube fibers are coated with polymer materials, then surface wear resistance is improved, but the internal empty space remains unfilled and mechanical properties are not maximized
Solution Approach 1:
The invention applies a nested structure where carbon precursor materials are infiltrated into and fill the internal empty spaces within the carbon nanotube fiber bundles. This nested arrangement allows the carbon precursor to occupy the internal voids, creating a multi-layered reinforcement structure that addresses both surface and internal structural deficiencies.
Solution Approach 2:
The invention applies different treatments to different regions: the exterior surface receives carbon precursor coating for wear resistance, while the internal empty spaces are filled with carbon precursor infiltration for structural reinforcement. This localized quality enhancement ensures that each region of the fiber receives the appropriate treatment for its specific functional requirements.
3Ease of manufacture
If carbon nanotube fibers are carbonized directly without filling empty space, then the process is simple, but tensile modulus and tensile strength are not significantly improved
Solution Approach 1:
The invention performs preliminary action by infiltrating carbon precursor materials into the empty spaces of carbon nanotube fibers before the carbonization process. This pre-treatment ensures that when carbonization occurs, the internal voids are already filled with carbon precursor that will transform into solid carbon, thereby maximizing the reinforcement effect during the subsequent carbonization step.
Solution Approach 2:
The carbon precursor acts as an intermediary material that facilitates the enhancement of mechanical properties. It is introduced into the empty spaces, serves as a precursor that transforms during carbonization, and mediates the transformation from porous nanotube structure to densely reinforced carbon fiber composite, enabling significant improvement in tensile modulus and strength.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method significantly increases tensile modulus and tensile strength by 7 to 10 times and thermal stability, allowing the fibers to maintain performance at high temperatures and enabling flexible, three-dimensional structure formation.
Implementation Method 1
preparing carbon nanotube fibers coated with the carbon precursor by dissolving a carbon precursor in a solvent and immersing carbon nanotubes therein
Implementation Method 2
stabilizing the carbon nanotube fibers dried in the step (b) through heat treatment at 100 to 400° C. under air atmosphere
Implementation Method 3
carbonizing the carbon nanotube fibers stabilized in the step (c) through heat treatment at 500 to 1600° C. for 30 minutes to 1 hour under inert gas atmosphere
Implementation Method 4
Carbon nanotube fibers reinforced with a carbon precursor according to the present invention are carbonized by the empty space inside the carbon nanotube fibers being filled with a carbon precursor, and therefore, are highly effective in that the mechanical and thermal properties are improved due to effective stress transfer and contact resistance decrease
Data Source
AI summary
The present invention relates to carbon nanotube fibers reinforced with a carbon precursor and a method for manufacturing the same. The carbon nanotube fibers reinforced with a carbon precursor according to the present invention are carbonized by the empty space inside the carbon nanotube fibers being filled with a carbon precursor, and therefore, are highly effective in that the mechanical and thermal properties are improved due to effective stress transfer and contact resistance decrease, and these properties are maintained intact even at high temperatures.