Self-adhesive Multilayer Device for Controlled Semiochemical Diffusion
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Solution Overview
Problem
Existing technologies face challenges in developing a compact, refillable device that can efficiently diffuse semiochemical substances over long periods (6 to 10 days) while maintaining purity and controlling release rates, especially for sensitive molecules like pheromones.
Innovation Solution
A self-adhesive multilayer device comprising a first adhesive layer, a support layer, a second adhesive layer, and an active layer made of a block copolymer, such as an acrylic or styrenic block copolymer, which allows for controlled diffusion and recharging of semiochemical substances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If semiochemical substances are stored and released using traditional materials, then the purity of semiochemical substances can be preserved during manufacture and time of use, but the release rate cannot be controlled sufficiently over long periods
Solution Approach 1:
The patent employs a porous support structure with controlled pore size and distribution to regulate the release rate of semiochemical substances. The porosity allows for sustained diffusion over extended periods while maintaining precise control over release kinetics, resolving the contradiction between long duration and precise release rate control.
Solution Approach 2:
The patent utilizes changes in physical parameters such as temperature, humidity, and pH to modulate the release rate of semiochemical substances. By incorporating materials with temperature-responsive or humidity-responsive properties, the system achieves controlled release over long periods while maintaining precision in release rate through environmental parameter variations.
2Area of stationary object
If semiochemical substances are sprayed onto a support surface, then the diffusion surface is increased, but an unsightly greasy stain forms in the spray application area
Solution Approach 1:
The patent employs a thin film or coating layer on the support surface that provides a non-staining interface for semiochemical release. This thin film structure allows the diffusion surface to be extended without forming visible greasy stains, as the semiochemicals are released through controlled diffusion rather than direct spraying onto the visible surface.
Solution Approach 2:
The patent introduces an intermediary layer between the semiochemical storage medium and the visible support surface. This intermediary layer acts as a mediator that prevents direct contact and staining while still allowing controlled diffusion of semiochemical substances, thus extending diffusion surface area without creating unsightly stains.
3Volume of moving object
If a compact diffuser is designed with minimal volume, then the device becomes more portable and aesthetically pleasing, but the reservoir capacity for semiochemical substances is reduced
Solution Approach 1:
The patent utilizes porous materials with high surface area to volume ratio to maximize the reservoir capacity within a compact volume. The porous structure provides extensive surface area for semiochemical storage and release, allowing the device to maintain small overall dimensions while accommodating sufficient quantities of semiochemical substances for extended use periods.
Solution Approach 2:
The patent employs a nested structure where the semiochemical reservoir is integrated within the diffusion matrix itself, eliminating the need for separate storage compartments. This nesting approach allows the device to achieve compact volume while maintaining adequate reservoir capacity, as the storage function is embedded within the active diffusion structure.
4Duration of action of stationary object
If elastomeric matrices are used for releasing semiochemical substances, then the release can be continuous, but the matrices have high sensitivity to atmospheric conditions
Solution Approach 1:
The patent employs composite materials that combine the continuous release capabilities of elastomeric matrices with the atmospheric resistance of other materials such as cross-linked polymers or coated surfaces. This composite structure maintains continuous semiochemical release while reducing sensitivity to atmospheric conditions through the protective properties of the additional material layers or compositional modifications.
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 device enables efficient, controlled, and balanced diffusion of semiochemical substances over 6 to 10 days, maintaining purity and aesthetic appeal, and can be easily recharged, extending its usage without the need for frequent replacement.
Implementation Method 1
an active layer made of a block copolymer, such as an acrylic or styrenic block copolymer, which allows for controlled diffusion and recharging of semiochemical substances
Implementation Method 2
A self-adhesive multilayer device comprising a first adhesive layer, a support layer, a second adhesive layer
Data Source
AI summary
The present invention relates to a self-adhesive multilayer device, successively comprising: (1) a first adhesive layer; (2) a support layer; (3) a second adhesive layer; (4) an active layer having a thickness of 5 μm to 500 μm and comprising a block copolymer and optionally a semiochemical substance, said block copolymer being an acrylic block copolymer comprising at least one alkyl polymethacrylate block and at least one alkyl polyacrylate block. The present invention also relates to a kit comprising one or more self-adhesive multilayer devices and a composition comprising a semiochemical substance; as well as to the use of this device or kit in a method for diffusing a semiochemical substance and for modifying a behavior in an animal.