Gelled-Shell Microcapsules for Long-Lasting Pheromone Diffusion
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Solution Overview
Problem
Existing pheromone-based biocontrol products are labor-intensive, require frequent manual application, and fail to maintain constant pheromone diffusion over prolonged periods, limiting their effectiveness in pest control.
Innovation Solution
Encapsulation of pheromones in microcapsules with a lipophilic core surrounded by a gelled shell, controlling diffusion through the partition coefficient and capsule geometry, allowing for prolonged and constant release over several weeks to months.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If pheromones are stored in plastic or polymeric dispensers, then pheromone diffusion is enabled, but the diffusion duration is insufficient (less than 10 days) and manual application is required frequently
Solution Approach 1:
The patent changes the physical-chemical parameters of the dispersion medium from conventional water-based or simple organic solvents to a specific oil phase (paraffin, mineral oil, or vegetable oil) with carefully controlled viscosity (10-1000 cP at 20°C). This parameter change enables the pheromone to remain solubilized for extended periods while maintaining controllability of the diffusion rate through viscosity adjustment, thereby extending diffusion duration to over 38 days while enabling sprayable formulations for improved application efficiency.
Solution Approach 2:
The invention creates a composite formulation system consisting of three main components: (1) pheromone active substance, (2) oil phase dispersion medium (paraffin/mineral/vegetable oil), and (3) surfactant or co-solvent system. This composite material approach allows synergistic interaction between components - the oil phase provides long-term solubilization and controlled release, while surfactants ensure sprayability and uniform distribution, collectively achieving both extended duration and improved productivity.
2Reliability
If pheromone concentration is increased to improve effectiveness, then pest control efficiency improves, but the diffusion time decreases
Solution Approach 1:
The patent utilizes the viscosity parameter of the oil phase as a control variable to decouple concentration from diffusion rate. By adjusting oil viscosity (within 10-1000 cP range) and selecting appropriate surfactant types and concentrations, the formulation can maintain high pheromone concentrations for effectiveness while the controlled viscosity prevents premature diffusion, thereby extending diffusion duration even at higher effective concentrations.
3Reliability
If manual application of pheromone dispensers is used, then pest control is achieved, but labor requirements are high and treatment uniformity is poor
Solution Approach 1:
The invention transforms the pheromone formulation into a sprayable liquid or aerosol system by selecting oil phases with appropriate viscosity (10-1000 cP) and incorporating surfactants that reduce surface tension. This enables the formulation to be delivered through conventional pneumatic spray equipment, replacing manual dispenser application with automated spray systems that provide uniform coverage and reduce labor while maintaining pest control effectiveness.
4Ease of operation
If conventional solvents are used for pheromone dispersion, then application is simplified, but environmental contamination and safety issues arise
Solution Approach 1:
The patent replaces conventional volatile organic solvents with oil phases (paraffin, mineral oil, or vegetable oils) that have fundamentally different physical-chemical parameters - specifically, lower volatility and different solubility characteristics. This parameter change eliminates evaporative contamination and reduces environmental persistence issues while maintaining the ability to disperse and apply pheromones effectively. The oils serve as both solvent and controlled-release matrix.
Solution Approach 2:
The oil phase formulation creates an inert, non-reactive environment for the pheromone substance. The paraffin, mineral oil, or vegetable oil matrices are chemically inert and do not promote degradation or unwanted reactions, providing a safe, environmentally benign carrier system that simplifies handling and application while eliminating the harmful effects associated with conventional volatile solvents.
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 encapsulation method extends pheromone diffusion time from less than 10 days to over 38 days, enabling uniform treatment of large areas and compatibility with standard agricultural equipment.
Implementation Method 1
controlling the diffusion of the active compound from the core by influencing the partition coefficient of the compound between the lipophilic phase and the aqueous phase
Implementation Method 2
controlled diffusion of active organic compounds over periods lasting from several weeks to several months
Data Source
AI summary
A microcapsule with a core including a lipophilic phase surrounded by a gelled shell, and wherein the core further includes at least one active organic compound, the uses of the microcapsule in various fields of application such as crop and/or seed treatment, human and/or animal nutrition, cosmetics and pharmaceuticals, soil and wastewater decontamination, care products, and a method for treating crops and/or seeds.