Nanocellulose Electronics With Water-Triggered Erasure
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Solution Overview
Problem
Existing transient electronics face limitations in material usability, cost, and degradation timescales, with prior methods relying on intrinsic material fragmentation or external agents for disintegration, which pose challenges in applications such as medical implants, eco-friendly devices, and military stealth missions.
Innovation Solution
A novel erasable nanocellulose electronic device is developed, utilizing the loss of adhesion in bacterial nanocellulose when saturated with water to induce mechanical decoupling and disintegration of electronic components, allowing for transient properties without external agents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If biodegradable materials are used for transient electronics, then environmental friendliness is improved, but degradation timescale increases to days or months
Solution Approach 1:
The patent changes the physical-chemical parameters of nanocellulose by controlling its saturation with water. When nanocellulose transitions from a dry state (strong adhesion) to a saturated state (weak adhesion), it triggers rapid disintegration of electronic components within minutes rather than days or months. This parameter change enables quick degradation while maintaining environmental friendliness.
Solution Approach 2:
The patent introduces dynamic control over the adhesion properties of nanocellulose substrate. By making the substrate's adhesive strength variable (strong when dry, weak when saturated), it enables on-demand disintegration of electronics. This dynamic property allows the system to transition from a stable state during operation to a rapidly disintegrating state when triggered by water saturation.
2Reliability
If specialized materials like water-soluble substrates or reactive chemicals are used, then transience is achieved, but material cost and manufacturing complexity increase
Solution Approach 1:
The patent employs nanocellulose's inherent property of adhesion loss upon water saturation, eliminating the need for external triggers like corrosive chemicals or complex degradation mechanisms. The material itself provides the transience function through its natural response to water, simplifying manufacturing and reducing costs while maintaining reliable transience control.
Solution Approach 2:
The patent utilizes a simple parameter change (water saturation) to trigger adhesion loss in nanocellulose, avoiding the need for specialized water-soluble substrates or reactive chemical systems. This approach maintains transience reliability while dramatically simplifying material selection and manufacturing processes.
3Reliability
If strong adhesion is maintained for device stability, then operational reliability is improved, but ability to disintegrate rapidly deteriorates
Solution Approach 1:
The patent makes the adhesion strength of the nanocellulose substrate dynamic rather than static. During normal operation, the dry nanocellulose provides strong adhesion for device stability. When triggered by water saturation, the adhesion strength dynamically decreases, enabling rapid disintegration. This dynamic control resolves the contradiction between stability and disintegration speed.
Solution Approach 2:
The patent changes the physical state of nanocellulose from dry (strong adhesion) to water-saturated (weak adhesion), creating a switchable adhesion property. This parameter change enables the system to maintain strong device stability during operation while allowing rapid disintegration when triggered, resolving the contradiction between these two 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
This approach enables quick and cost-effective transience in electronic devices, avoiding the need for specialized or hazardous materials, with electronic components separating and fragmenting through adhesion loss and mechanical action, suitable for various applications including medical and military uses.
Implementation Method 1
This relies on the loss of adhesion under mechanical action that bacterial nanocellulose experiences when saturated with water
Implementation Method 2
the transience of these nanocellulose electronics rely on the mechanical decoupling on the components due to a loss of mutual adhesion and mutual cohesion
Implementation Method 3
the electronic components separate and fragment from each other through adhesion loss and mechanical action
Data Source
AI summary
A method of making an erasable nanocellulose electronic structure comprising the steps of providing a nanocellulose sheet, adhering metal contacts onto the nanocellulose sheet, applying solder to the metal contacts, and attaching surface mount devices to the contacts. An erasable nanocellulose electronic structure comprising a nanocellulose sheet, a metal contact on the nanocellulose sheet, a layer of solder on the metal contact, and a surface mount device to the contact.