Magnetic Elastomer Composites for Remote Sensing and Stiffness Control
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Solution Overview
Problem
Soft materials lack the ability to remotely sense changes and control mechanical properties, limiting their application in monitoring and adjusting to specific conditions, such as injury prediction in athletes or patients with neuropathy.
Innovation Solution
Incorporating anisotropic magnetic particles into elastomeric resins, allowing for remote sensing and control through magnetic fields, using sensors like Hall Effect sensors and electromagnets to detect and alter the material's mechanical properties in real-time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If ferromagnetic nanoparticles are suspended in precursor polymer and 3D printed, then structural fidelity is improved, but device complexity increases due to integration of sensors and electromagnets
Solution Approach 1:
The patent combines multiple functions into a single integrated system: the ferromagnetic nanoparticles serve both as structural fillers for 3D printing and as sensing elements for magnetic field detection. The Hall Effect sensor and electromagnet are integrated with the soft material composite to create a unified system that can sense and respond to mechanical deformation, eliminating the need for separate sensing and actuation systems.
Solution Approach 2:
The ferromagnetic nanoparticles perform multiple functions simultaneously: they provide structural support and fidelity during 3D printing, enable magnetic field sensing through their response to deformation, and allow for remote actuation of the soft material's mechanical properties. This multi-functionality reduces the need for additional components and simplifies the overall system architecture.
2Adaptability or versatility
If Hall Effect sensor and electromagnet are interfaced with soft material, then remote sensing and control capability is improved, but loss of time increases due to real-time monitoring and response cycles
Solution Approach 1:
The ferromagnetic nanoparticles are pre-integrated into the soft material composite during manufacturing, establishing the sensing capability in advance. The closed-loop system is pre-configured with the Hall Effect sensor and electromagnet interfaces, so that when deployment occurs, the system can immediately begin real-time monitoring and response without requiring additional setup or calibration time.
Solution Approach 2:
The patent implements a closed-loop feedback system where the Hall Effect sensor continuously monitors the magnetic field changes caused by soft material deformation, and the electromagnet responds in real-time by applying corrective magnetic fields to restore or modify the material's mechanical properties. This automated feedback loop eliminates manual intervention and reduces response time.
3Ease of operation
If anisotropic magnetic particles are incorporated into elastomeric resin, then ease of operation is improved through wireless control, but object-generated harmful factors increase due to magnetic interference
Solution Approach 1:
The anisotropic magnetic particles are selectively distributed within the elastomeric resin to create localized magnetic response zones. This allows the soft material to exhibit different magnetic properties in different regions, enabling precise wireless control while confining magnetic interference to specific areas rather than affecting the entire system uniformly.
Solution Approach 2:
The patent utilizes the ability to change the magnetic properties of the anisotropic particles through external magnetic fields, allowing dynamic adjustment of the soft material's mechanical properties such as stiffness and viscosity. By changing magnetic field parameters, the system can achieve wireless control of material behavior without physical contact, while managing magnetic interference through parameter optimization.
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
Enables remote monitoring of mechanical properties and potential injuries by detecting changes in magnetic fields, allowing for real-time adjustments to stiffness or softness, enhancing the diagnostic and preventive capabilities in applications like shoe soles for athletes and patients.
Implementation Method 1
Change in the magnetic field of the nanoparticles caused by deformation of the soft material can be detected by sensors such as a Hall Effect sensor (e.g., a magnetometer)
Implementation Method 2
an external magnetic field can be applied to stiffen or soften the material
Data Source
AI summary
Disclosed are functional materials for use in additive manufacturing (AM). The functional material can comprise an elastomeric composition (e.g., a silicone composite) for use in, for example, direct ink writing. The elastomeric composition can include an elastomeric resin, and a magnetic nanorod filler dispersed within the elastomeric resin. Nanorod characteristics (e.g., length, diameter, aspect ratio) can be selected to create 3D-printed constructs with desired mechanical properties along different axes. Furthermore, since nickel nanorods are ferromagnetic, the spatial distribution and orientation of nanorods within the continuous phase can be controlled with an external magnetic field. This level of control over the nanostructure of the material system offers another degree of freedom in the design of functional parts and components with anisotropic properties. Magnetic fields can be used to remotely sense compression of the constructs, or alternatively, control the stiffness of these materials.