Dynamic Elastomeric Films for Active Biofouling Control
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Solution Overview
Problem
Biofouling poses a significant and costly problem across various industrial, military, and medical applications, hindering the manipulation of biological systems and resulting in annual costs exceeding $1 to $100 billion, as existing technologies are ineffective in actively controlling the adherence and detachment of fouling agents from surfaces.
Innovation Solution
The development of dynamic elastomeric films that can change shape in response to external stimuli, such as electrical actuation or mechanical deformation, to deform beyond a critical strain and detach fouling agents from surfaces, including bacterial biofilms and macro-fouling organisms, using mechanisms like surface stretching, electrical actuation, and pneumatic pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing biofouling control technologies are used, then surfaces remain static and simple to manufacture, but they fail to actively control the adherence and detachment of fouling agents, resulting in high annual costs and reduced effectiveness
Solution Approach 1:
The patent applies the dynamics principle by transforming static surfaces into dynamic surfaces that can actively change shape. The elastomeric coating layer is designed to deform in response to actuation signals, enabling the surface to transition between different configurations. This dynamic capability allows the surface to actively control fouling agent adherence and detachment, resolving the contradiction between reliability and device complexity by introducing controlled motion to achieve superior biofouling control effectiveness
Solution Approach 2:
The patent employs parameter changes by modifying the physical state and geometric parameters of the surface through actuation. The elastomeric coating's shape, surface area, and topography are dynamically adjusted in response to control signals. These parameter changes enable the surface to alter its fouling-resistant properties on demand, achieving effective biofouling control while managing the complexity through programmable parameter transformation
2Productivity
If dynamic elastomeric films are used to actively detach fouling agents, then biofouling control effectiveness is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent utilizes flexible shells and thin films by employing an elastomeric coating layer that can be applied as a thin flexible film over a substrate. This layer is capable of deformation when actuated, enabling efficient fouling agent detachment. The thin film approach maintains manufacturing ease compared to rigid complex structures while achieving the required dynamic functionality for high productivity in fouling control
Solution Approach 2:
The patent applies composite materials by combining an elastomeric coating layer with a substrate to create a composite structure. The elastomeric layer provides the necessary flexibility and deformability for active fouling detachment, while the substrate provides structural support. This composite approach balances manufacturing ease with the enhanced productivity required for effective biofouling control
3Reliability
If surfaces are deformed beyond critical strain to detach fouling agents, then fouling removal effectiveness is improved, but the energy consumption and actuation requirements increase
Solution Approach 1:
The patent implements periodic action by applying actuation signals in periodic cycles to the elastomeric coating. The surface is deformed beyond critical strain at specific intervals to detach fouling agents, then returned to its original configuration. This periodic deformation pattern achieves complete fouling removal effectiveness while managing energy consumption by concentrating actuation energy at optimal moments rather than continuous operation
Solution Approach 2:
The patent uses dynamics by creating a dynamically responsive surface that can rapidly transition between deformed and relaxed states. The elastomeric coating's dynamic properties allow it to quickly reach the critical strain threshold for fouling detachment and then rapidly return to its original shape. This dynamic behavior achieves reliable fouling removal while minimizing energy consumption by utilizing the material's inherent elastic properties rather than requiring continuous energy input
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 effectively prevents the adherence and actively removes fouling agents, demonstrating high efficiency in detaching biofilms and macro-fouling organisms, reducing the shear stress required for detachment, and maintaining surface functionality over extended periods.
Implementation Method 1
a voltage source configured to apply voltage between the electrode and the biological material such that the surface is changed between a first shape and a second shape
Implementation Method 2
a mechanism comprising a structure configured to change the surface between a first shape and a second shape. The change from the first shape to the second shape deforms the surface beyond a critical strain for debonding of a fouling agent
Data Source
AI summary
Disclosed herein are devices and methods for active biofouling control. According to an aspect, a device comprising a surface for contacting a biological material. The device also comprises a mechanism comprising a structure configured to change the surface between a first shape and a second shape. The change from the first shape to the second shape deforms the surface beyond a critical strain for debonding of a fouling agent from the surface when the fouling agent has bonded to the surface in the first shape.