Carbon Nanotube Immobilization via Linking Groups for Peel Resistance
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Solution Overview
Problem
Conventional transparent conductive films using carbon nanotubes face issues with insufficient adhesion to base materials, leading to peeling, and struggle to achieve both high light transmittance and conductivity due to structural limitations and defects.
Innovation Solution
A method involving chemical bonding of carbon nanotubes to a base material surface using linking groups such as -NH, -NH-R1-NH, -SO, R2, or -O-R3 groups, facilitated by surface modifications with functional groups like -NH2, -NH-R1-NH2, -SOCl, -R2-MgX, -O-R3-ONa, and -R2-Li, enhances adhesion and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If carbon nanotubes are used to form transparent conductive films, then conductivity and light transmittance are improved, but adhesion to base material deteriorates causing peeling
Solution Approach 1:
The patent introduces a silane-based linking group as an intermediary between the carbon nanotubes and the base material. This linking group forms chemical bonds with both the carbon nanotubes and the base material, acting as a bridge that transfers adhesion forces and prevents peeling while maintaining the electrical and optical properties of the carbon nanotube film.
Solution Approach 2:
The patent creates a composite structure consisting of carbon nanotubes, silane-based linking groups, and base material. This composite approach combines the advantages of carbon nanotubes (conductivity, transparency) with the adhesion benefits of silane chemistry, resulting in a multi-functional material system that resolves the contradiction between film properties and adhesion.
2Ease of manufacture
If multi-walled carbon nanotubes with small aspect ratio are used, then production cost is reduced, but light transmittance and conductivity deteriorate
Solution Approach 1:
The patent changes the structural parameters of the carbon nanotubes by introducing silane-based functional groups at specific positions along the nanotube structure. This modification allows the use of shorter, more cost-effective carbon nanotubes while maintaining excellent electrical and optical properties through the enhanced interfacial bonding provided by the silane linking groups.
3Ease of manufacture
If carbon nanotubes are simply laminated on base material, then ease of manufacture is improved, but adhesion deteriorates leading to peeling
Solution Approach 1:
The patent applies silane-based functional groups to the carbon nanotubes before forming the final film structure. This preliminary functionalization ensures that adhesion capabilities are built into the nanotube structure itself, allowing for simple lamination processes while guaranteeing strong bonding to the base material through the pre-installed silane linking groups.
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 immobilized carbon nanotubes provide improved resistance to peeling and enable functionalities like conductivity, electrical static dissipative, and antistatic properties with long-term stability.
Implementation Method 1
the carbon nanotube is chemically bonded on the base material surface via a linking group
Implementation Method 2
the linking group is formed via a chemical bond between a fluorine group on a surface of the carbon nanotube before immobilizing and an amino group on the base material
Data Source
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AI summary
To provide a novel immobilized product in which a carbon material and/or a silicon material is/are immobilized on a base material surface by a chemical bond via a linking group, and a method for producing the same. The immobilized product (10) of the present invention is an immobilized product in which a carbon material (11) is immobilizing on a surface of a base material (12), wherein the carbon material (11) is chemically bonded on the surface of the base material (12) via a linking group, and the linking group is at least any one selected from the group consisting of a -NH group, a -NH-R1-NH group, a -SO group, a R2 group, an -O-R3-O group, and a R4 group (in which the R1 to R4 each independently represent at least one selected from the group consisting of a chain alkyl group, a cyclic alkyl group, a chain alkenyl group, a cyclic alkenyl group, a chain alkynyl group, an aryl group, and functional groups in which at least one of a hydroxyl group, a halogen, an ester group, an ether group, a carbonyl group, an amino group, an amide group, a cyano group, a thiol group, a thioester group, or a thioether group is further bonded to these functional groups).