Edible Conductive Composition With Activated Carbon and Water Stability
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Solution Overview
Problem
Existing edible electronic materials, such as metals and carbon-based conductors, are expensive, not compatible with bulk production, lack adhesion properties, and pose health risks, making them unsuitable for large-scale and versatile applications in edible electronics.
Innovation Solution
A composition comprising a matrix of edible waxes and oils with activated carbon as the conductive material, allowing for tunable rheology, adhesion, and electrical conductivity, suitable for various manufacturing techniques and environments, including water contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional metal electrodes (magnesium, zinc, iron, tin, silver, gold) are used in edible electronics, then electrical conductivity is achieved, but cost increases and health safety deteriorates due to poisoning risks and limited safe intake amounts
Solution Approach 1:
The patent replaces expensive, toxic metal electrodes with activated carbon, a cheap and biodegradable material. The composition uses activated carbon particles dispersed in an edible matrix that can be safely ingested and degraded after use, eliminating the need for recollection and avoiding long-term toxic accumulation in the body
Solution Approach 2:
The patent creates a composite material system combining activated carbon (conductive component) with edible polymers, oils, and plasticizers (matrix components). This composite approach allows the conductive material to be embedded in a biocompatible, degradable matrix that provides both safety and functional properties
2Reliability
If carbon-based conductive materials (graphene, carbon nanotubes, carbon nanofibers) are used, then electrical conductivity is achieved, but health safety deteriorates as these materials cannot be safely ingested
Solution Approach 1:
The patent selects activated carbon over other carbon-based materials because it is specifically approved for ingestion (as an adsorbent in pharmaceuticals) and is biodegradable. The material is designed to be temporary and safe for short-term use in the digestive system, unlike graphene or carbon nanotubes which have unknown long-term toxicity
Solution Approach 2:
The patent changes the form and properties of carbon material from nanoscale structures (graphene, nanotubes) to microparticulate activated carbon with specific surface area and pore structure. This parameter change makes the material both conductive and safe for ingestion, as the larger particle size and established safety profile allow gastrointestinal passage without accumulation
3Reliability
If activated carbon powder is used directly, then electrical conductivity and edibility are achieved, but adhesion properties and mechanical strength deteriorate
Solution Approach 1:
The patent creates a composite where activated carbon particles are dispersed in an edible polymer matrix (oils, waxes, plasticizers). The matrix provides mechanical strength and adhesion to substrates, while the activated carbon provides conductivity. This composite structure compensates for the weak mechanical properties of pure carbon powder
Solution Approach 2:
The edible polymer matrix acts as an intermediary between the activated carbon particles and the substrate. It binds the carbon particles together and to the substrate surface, providing the adhesion and mechanical integrity that the carbon powder alone cannot achieve
4Object-affected harmful factors
If edible materials are used in large amounts, then health safety is improved, but electrical conductivity deteriorates due to lack of sufficient conductive material
Solution Approach 1:
The patent optimizes the concentration and distribution of activated carbon particles in the edible matrix to achieve percolation threshold for electrical conductivity. By controlling particle size, shape, and dispersion, the material achieves adequate conductivity at safe ingestion levels, balancing both requirements
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 provides safe, cost-effective, and versatile edible conductive materials with stable electrical properties, suitable for applications like food quality monitoring and smart pills, maintaining conductivity in water and adhering to diverse surfaces.
Implementation Method 1
an edible electrically conductive material... the edible electrically conductive material is activated carbon (AC)... stable electrical properties in air and in water-based liquids and solutions
Data Source
Figure 1a~2b
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AI summary
Edible electrically conductive composition comprising a) a matrix comprising at least one wax and at least one oil, b) an edible electrically conductive material.