Enteric Matrix Microencapsulation of Essential Oils
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Solution Overview
Problem
Existing methods for enteric delivery of active materials in food applications are limited, particularly in microencapsulation, which often require organic solvents and specialized equipment, making them costly and environmentally unfriendly, and are not well-suited for integration into food products.
Innovation Solution
A method for microencapsulating a hydrophobic liquid within an enteric matrix in an aqueous environment without using organic solvents, involving agitation, homogenization, and acid titration to create a stable emulsion and particulate precipitate, which is then filtered, washed, and dried to form a powder.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional microencapsulation methods are used, then enteric delivery of active materials is achieved, but organic solvents and specialized equipment are required, increasing cost and complexity
Solution Approach 1:
The invention changes the pH parameter of the aqueous solution to control the solubility and precipitation of the enteric matrix material. By adjusting pH from acidic (dissolution) to neutral/basic (precipitation), the method achieves microencapsulation without organic solvents or specialized equipment, resolving the contradiction between reliable enteric delivery and process complexity
Solution Approach 2:
The method utilizes phase transition of the enteric matrix material through pH-induced precipitation. The matrix material transitions from dissolved state in acidic solution to precipitated particulate form in neutral/basic solution, enabling microencapsulation of the hydrophobic liquid without requiring organic solvents or complex specialized equipment
2Reliability
If traditional microencapsulation methods are used, then enteric delivery is achieved, but additional capital expenditures and organic solvent procurement are required
Solution Approach 1:
The method uses readily available materials (water, food-grade enteric matrix, common acids/bases) that can perform the microencapsulation function without requiring expensive specialized equipment or organic solvent procurement systems. The process essentially serves itself using basic laboratory or kitchen equipment
Solution Approach 2:
The invention replaces expensive, reusable specialized equipment and organic solvent systems with simple, disposable-like basic chemicals and equipment. The enteric matrix itself acts as a single-use encapsulation vehicle that dissolves in the stomach, eliminating the need for costly durable specialized delivery systems
3Manufacturing precision
If traditional microencapsulation methods are used, then encapsulation is achieved, but the process requires organic solvents which create environmental waste
Solution Approach 1:
The invention converts the typically harmful organic solvents into beneficial water-based systems. By using pH-controlled aqueous precipitation instead of organic solvents, the method eliminates harmful waste while achieving the same encapsulation precision, turning a harmful approach into a beneficial green chemistry solution
Solution Approach 2:
By changing the fundamental parameter from organic solvent-based to water-based pH-controlled precipitation, the method achieves precise encapsulation without generating organic solvent waste, resolving the contradiction between manufacturing precision and environmental harm
4Reliability
If tablets or gel capsules are used for enteric delivery, then active materials are protected, but the delivery methods are not sized for integration into food products
Solution Approach 1:
The invention segments the large-scale tablet or capsule delivery system into microscopic individual particle units. This segmentation allows the enteric-protected active material to be dispersed and integrated into various food products at appropriate scales, maintaining protection while gaining food application versatility
Solution Approach 2:
The method transitions from macroscopic tablet/capsule dimensions to microscopic particle dimensions. This dimensional change enables the enteric delivery system to be incorporated into food products in quantities and forms appropriate for consumption, while still providing the same protective function
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 method allows for efficient and environmentally friendly microencapsulation of hydrophobic liquids within an enteric matrix, enabling controlled release and integration into food products without the need for organic solvents, reducing waste and capital expenditures.
Implementation Method 1
agitating a combination of water, an enteric matrix material and an emulsifier, the combination at a pH that maintains complete dissolution of the enteric matrix material
Implementation Method 2
homogenizing the hydrophobic liquid and the combination to create a fine, stable emulsion
Implementation Method 3
acid titrating the emulsion under agitated conditions in an amount effective to form a particulate precipitate
Data Source
Figure 1
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AI summary
Hydrophobic liquids are microencapsulated by an enteric matrix in an environment substantially free of organic solvents, the process including forming an emulsion of the enteric material and hydrophobic liquid in water, the emulsion titrated with an acid to form a particulate precipitate of the microencapsulated hydrophobic liquid in an enteric matrix.