Magnetic Adhesive Composition for Precise Placement and Leak Control
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Solution Overview
Problem
Cyanoacrylate adhesives face challenges in delivering and maintaining their position in hard-to-reach locations due to rapid polymerization and leakage, limiting their effectiveness in medical and industrial applications.
Innovation Solution
Magnetic adhesive compositions containing a curable matrix and dispersed magnetic particles that can be directed and immobilized using a magnetic field, allowing controlled application and curing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cyanoacrylate adhesive is applied to hard-to-reach locations, then adhesion can be achieved, but the adhesive leaks out of the desired location due to rapid polymerization
Solution Approach 1:
The patent introduces magnetic particles as an intermediary component within the adhesive formulation. These particles enable magnetic field interaction, allowing the adhesive to be guided to target locations and retained in place during curing, thereby preventing leakage while maintaining adhesion effectiveness
Solution Approach 2:
The patent modifies the adhesive's physical parameters by incorporating magnetic particles that respond to external magnetic fields. This allows dynamic control of the adhesive's flow and positioning characteristics during application, enabling precise placement without leakage
2Ease of operation
If magnetic particles are added to cyanoacrylate adhesive, then flow control and positioning are improved, but the particles may agglomerate or precipitate
Solution Approach 1:
The patent optimizes particle parameters including size distribution, surface area, and magnetic properties to prevent agglomeration. By carefully controlling these parameters, the adhesive maintains stable particle dispersion while retaining magnetic responsiveness for flow control
Solution Approach 2:
The patent creates a composite adhesive system combining cyanoacrylate polymer matrix with magnetically responsive particles. This composite structure integrates the bonding capabilities of cyanoacrylate with the flow control properties of magnetic particles, achieving both stability and controllability
3Strength
If cyanoacrylate adhesive is used for internal wound closure, then tissue bonding capability is improved, but the rapid cure time limits delivery to hard-to-reach areas
Solution Approach 1:
The patent applies magnetic field guidance before the adhesive cures, directing the flowable adhesive to the target location. This preliminary magnetic guidance occurs while the adhesive is still in its uncured, flowable state, enabling delivery to hard-to-reach areas before rapid polymerization occurs
Solution Approach 2:
The magnetic field acts as an intermediary mechanism that enables precise delivery of the adhesive to internal wound locations. This external magnetic guidance system overcomes the limitation of rapid cure time by providing directional control during the brief window before polymerization
4Reliability
If adhesive is placed in desired location, then bonding can occur, but the adhesive cannot be held in place during curing
Solution Approach 1:
The patent replaces mechanical placement methods with magnetic field-based positioning and retention. The magnetic field provides continuous holding force during curing, ensuring the adhesive remains precisely at the target location without mechanical intervention or risk of displacement
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 precise placement and retention of adhesives in desired locations, preventing leakage and ensuring effective bonding in challenging environments.
Implementation Method 1
The magnetic particles can be present in an effective amount to induce and direct flow of the adhesive composition under an applied magnetic field
Implementation Method 2
the magnetic field can be applied to retain the adhesive at a desired location during curing of the adhesive composition
Implementation Method 3
The acryl groups rapidly polymerize in the presence of water to form long, strong chains
Data Source
AI summary
Described herein are magnetic adhesive compositions. The adhesive compositions can comprise a curable matrix comprising one or more reactive precursor molecules, and a population of magnetic particles dispersed within the curable matrix. The magnetic particles can each comprise a magnetic particle core and shell at least partially encapsulating the magnetic particle core. The magnetic particles can be present in an effective amount to induce and direct flow of the adhesive composition under an applied magnetic field. As a consequence, a magnetic field can be used to control application and/or curing of these adhesive composition at a desired location. For example, these adhesive compositions can be applied as a flowable fluid, and subsequently directed to flow to a desired location prior to curing (and/or held at a desired location during curing). Accordingly, also provided are methods of adhering surfaces using these adhesive compositions.