Conductive Resin Composition via Solvent Evaporation
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Solution Overview
Problem
Existing resin compositions face challenges in achieving high conductivity while maintaining original mechanical properties and processability, often requiring high amounts of conductive materials that can lead to surface accumulation and subsequent loss, compromising mechanical and environmental integrity.
Innovation Solution
A method involving the mixing and dispersing of carbon nanotubes, a solvent, and a thermoplastic resin, followed by solvent removal during kneading, to create a conductive resin composition with improved conductivity and moldability using a small amount of carbon nanotubes, enhanced by the addition of a surfactant for better dispersion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the adding amount of conductive material is increased to provide high conductivity, then conductivity is improved, but molding processability and mechanical characteristics deteriorate
Solution Approach 1:
The patent changes the physical state parameter of water from liquid to vapor during the molding process. By introducing water in liquid form and then vaporizing it within the resin composition, the patent achieves high conductivity with minimal conductive material while maintaining molding processability. The phase change enables unique dispersion and distribution of conductive materials throughout the resin matrix.
Solution Approach 2:
The patent uses water as an intermediary substance that temporarily exists in the resin composition during molding. The water acts as a medium to facilitate uniform dispersion of conductive materials, and its subsequent vaporization leaves behind a homogeneous conductive network without residual liquid phases that would harm mechanical properties.
2Reliability
If the adding amount of conductive material is increased to provide high conductivity, then conductivity is improved, but mechanical characteristics deteriorate
Solution Approach 1:
By utilizing the phase change parameter of water (liquid to vapor), the patent achieves effective conductive material dispersion at low concentrations. This enables high conductivity while preserving the resin matrix integrity and mechanical strength, as minimal conductive material is required and no liquid residue remains to compromise structural properties.
3Reliability
If the adding amount of conductive material is increased, then conductivity is improved, but conductive material drops off on surface causing pollution and mechanical damage
Solution Approach 1:
The patent employs water vaporization to create a uniform three-dimensional conductive network deep within the resin composition. This internal distribution via phase change prevents surface accumulation of conductive materials, eliminating the harmful drop-off effect while maintaining high conductivity throughout the molded product.
4Strength
If a small amount of carbon nanotube is added to maintain original physical properties, then mechanical characteristics are preserved, but conductivity is insufficient
Solution Approach 1:
The patent introduces water as a transient phase-change medium that enables ultra-fine dispersion of minimal carbon nanotube quantities. The vaporization process creates a homogeneous conductive network that maximizes conductivity efficiency at low filler levels, preserving mechanical properties while achieving high conductivity.
Solution Approach 2:
Water serves as an intermediary that facilitates uniform carbon nanotube distribution during the molding process. Its temporary presence and subsequent vaporization enable effective conductive network formation with minimal filler, maintaining both mechanical integrity and electrical conductivity.
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
This approach allows for the production of a conductive resin with high conductivity and superior processability, maintaining the original physical properties of the thermoplastic resin, suitable for applications requiring antistatic properties without compromising mechanical characteristics or environmental safety.
Implementation Method 1
a step of removing the solvent while kneading the carbon nanotube resin mixture
Data Source
AI summary
Provided by the present invention is a conductive resin composition which has, by adding small amount of a carbon nanotube thereto, high conductivity and superior processability including moldability while keeping original physical properties owned by the thermoplastic resin itself. Provided is a method for producing a conductive resin composition, that is, a method for producing a conductive resin composition which contains a carbon nanotube and a thermoplastic resin, wherein the method contains following steps of (A) and (B); namely, (A) a step of mixing and dispersing the carbon nanotube, a solvent, and the thermoplastic resin, thereby obtaining a carbon nanotube resin mixture, and (B) a step of removing the solvent while kneading the carbon nanotube resin mixture. Provided further is a conductive resin composition obtained by the said production method.