Conducting Composition Using Cellulose Nanofibers and Graphene
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Solution Overview
Problem
Conventional conducting materials with cellulose nanofibers and inorganic particles exhibit insufficient conductivity, necessitating the development of a composition that enhances conductivity while maintaining transparency and flexibility.
Innovation Solution
A conducting composition comprising cellulose nanofibers and nano-scale inorganic powders such as graphene or graphene oxide, where the cellulose nanofibers efficiently adsorb the inorganic particles to achieve high conductivity, anisotropic properties, and transparency, potentially combined with a polymer matrix for improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional conducting materials with cellulose nanofibers and inorganic particles are used, then transparency and flexibility are maintained, but conductivity is insufficient
Solution Approach 1:
The patent changes the particle size parameter of inorganic conducting particles to nano-scale (50 nm or less), which dramatically increases the surface area to volume ratio and improves adsorption efficiency onto cellulose nanofibers, achieving high conductivity with smaller amounts of material
Solution Approach 2:
The patent creates a composite material system combining cellulose nanofibers with nano-scale inorganic conducting particles (graphene, graphene oxide, or their derivatives), where the synergistic interaction between the two components achieves superior conductivity compared to conventional materials
2Reliability
If more inorganic particles are added to improve conductivity, then conductivity increases, but transparency and mechanical properties deteriorate
Solution Approach 1:
By reducing inorganic particle size to nano-scale (50 nm or less), the patent enables high conductivity with minimal particle loading, preventing light scattering and maintaining transparency while achieving the desired conductive performance
Solution Approach 2:
The patent concentrates conducting inorganic particles locally on the surface of cellulose nanofibers through adsorption, creating conductive pathways only where needed rather than uniformly distributing particles throughout the material, thus maintaining transparency in non-conductive regions
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 composition achieves high conductivity even with a small amount of inorganic particles, enabling applications in conductive films, sheets, or coatings with enhanced mechanical properties and transparency, as demonstrated by significantly reduced volume resistance values.
Implementation Method 1
the cellulose nanofiber efficiently adsorbs the component (B)
Data Source
AI summary
A conducting composition of the present invention includes a cellulose nanofiber and a fine particle. The conducting composition includes (A) a cellulose nanofiber, and (B) at least one type of an inorganic powder selected from graphene, graphene oxide, and derivatives thereof. A method for producing the conducting composition includes preparing a dispersion by adding water or a mixed solvent of water and a hydrophilic solvent to (A) a cellulose nanofiber and (B) at least one type of an inorganic powder selected from graphene, graphene oxide, and derivatives thereof, and removing the water or the mixed solvent of water and a hydrophilic solvent from the dispersion. Accordingly, the present invention provides a conducting composition that utilizes a cellulose nanofiber and an inorganic powder having the conductivity at a nano-scale size, can improve the conductivity, and further can have properties such as anisotropy and transparency.