Microcapsule Shell Strength via Composite Wax and Saccharide Layers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing microcapsules face challenges with susceptibility to rupture and reduced loading capacity due to increased wall thickness, and they lack effective impermeability and oxidative barriers, especially when encapsulating substances that are sensitive to oxygen.
Innovation Solution
The development of multicore microcapsules with enhanced shell structures using waxes, saccharides, proteins, and small molecules to block pores and increase crosslinks, resulting in improved structural strength, impermeability, and high payload capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the thickness of the microcapsule wall is increased to improve strength and impermeability, then the structural strength and impermeability are improved, but the loading capacity of the microcapsule is reduced
Solution Approach 1:
The patent applies composite materials by combining gelatin with waxes (beeswax, paraffin wax, carnauba wax) and saccharides to create a multi-component shell structure. This composite approach enhances the mechanical strength and impermeability of the shell without requiring excessive wall thickness, thereby maintaining higher loading capacity. The synergistic interaction between these materials provides both structural integrity and barrier properties.
Solution Approach 2:
The patent implements local quality by creating a multi-layered shell structure where different materials are positioned at different layers. The gelatin provides the base structure, while wax and saccharide layers are applied specifically to enhance impermeability and oxidative barrier properties at critical interfaces. This localized enhancement allows for optimized protection without uniformly increasing wall thickness throughout the entire shell.
2Ease of manufacture
If conventional microcapsule shells are used, then the microcapsules can be easily manufactured, but they exhibit poor oxidative barrier properties and reduced stability against oxygen
Solution Approach 1:
The patent combines gelatin with waxes and saccharides to create a composite shell that maintains ease of manufacture through established coacervation techniques while adding superior oxidative barrier properties. The wax and saccharide components are integrated into the shell formation process, allowing for straightforward manufacturing without complex additional steps.
Solution Approach 2:
The patent modifies the chemical composition parameters of the shell by incorporating materials with different oxygen permeability characteristics. The waxes and saccharides have lower oxygen permeability compared to gelatin alone, and their inclusion at specific concentrations (e.g., 0.1-10% wax, 1-20% saccharide) transforms the shell's oxidative barrier properties while maintaining manufacturability.
3Device complexity
If single-core microcapsules are used, then the structure is simple, but they are highly susceptible to rupture
Solution Approach 1:
The patent uses composite materials to strengthen the single-core microcapsule shell, combining gelatin with wax and saccharide components that provide enhanced mechanical strength and flexibility. This composite structure increases rupture resistance while maintaining the simplicity of the single-core configuration and avoiding the complexity of multi-core designs.
Solution Approach 2:
The patent applies local quality by concentrating the reinforcing materials (wax and saccharides) at specific locations within the shell structure, particularly at the interface between the core and shell and at potential stress concentration points. This localized reinforcement enhances rupture resistance without requiring a complete redesign of the overall simple single-core structure.
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 enhanced microcapsules exhibit extended induction periods, improved oxidative stability, and increased payload capacity, effectively protecting encapsulated substances from oxygen and maintaining stability and sensory properties.
Implementation Method 1
The enhanced microcapsules exhibit extended induction periods, improved oxidative stability, and increased payload capacity, effectively protecting encapsulated substances from oxygen
Data Source
Figure 1a~1d
Figure 2
Figure 3
AI summary
Disclosed are microcapsules and methods for preparing and using them, as well as methods for improving various properties of microcapsules like impermeability.