Biodegradable Microcapsules with Stabilized Multilayer Shell
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Solution Overview
Problem
Existing microcapsules used in high-demand areas like detergents and cosmetics lack the necessary diffusion resistance, chemical resistance, and temperature resistance, while biodegradable options do not provide sufficient stability and tightness, limiting their application.
Innovation Solution
Development of biodegradable microcapsules with a multilayer structure comprising a thin barrier layer and a thicker stability layer, where the barrier layer is treated with an emulsion stabilizer to enhance the deposition of the stability layer, resulting in improved tightness and biodegradability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If biodegradable microcapsule walls are used, then environmental compatibility is improved, but diffusion resistance and chemical resistance deteriorate
Solution Approach 1:
The microcapsule wall is segmented into multiple functional layers: an inner barrier layer made of organic polymer providing diffusion resistance, and an outer stability layer made of biopolymer providing environmental compatibility and biodegradability. This segmentation allows each layer to specialize in one function, resolving the contradiction between protection and eco-friendliness.
Solution Approach 2:
The microcapsule wall uses a composite structure combining organic polymer (for barrier properties) and biopolymer (for biodegradability). This composite material approach enables the wall to simultaneously achieve both diffusion resistance and environmental compatibility, as each material contributes its advantageous properties to the composite structure.
2Reliability
If organic polymer walls are used, then diffusion tightness and chemical resistance are improved, but biodegradability deteriorates
Solution Approach 1:
The wall structure is segmented such that the inner barrier layer uses organic polymer for chemical resistance, while the outer stability layer uses biopolymer for biodegradability. This functional segmentation allows the system to achieve both chemical resistance and biodegradability without compromising either aspect.
Solution Approach 2:
The composite wall structure combines organic polymer and biopolymer in a layered configuration, where the organic polymer provides chemical resistance and the biopolymer provides biodegradability. The composite nature of the wall allows both material properties to coexist and function together.
3Object-affected harmful factors
If natural-based microcapsule walls are used, then biodegradability is improved, but stability and tightness deteriorate
Solution Approach 1:
The wall is segmented into an inner barrier layer and outer stability layer, where the inner layer provides structural integrity and tightness using organic polymer, while the outer layer provides biodegradability using biopolymer. This segmentation allows the system to achieve both stability and biodegradability simultaneously.
Solution Approach 2:
The composite wall structure combines organic polymer and biopolymer, where the organic polymer component ensures stability and tightness, while the biopolymer component ensures biodegradability. The synergistic combination of these two materials resolves the contradiction between stability and environmental compatibility.
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 microcapsules exhibit enhanced stability and biodegradability, making them suitable for use in detergents, cleaning agents, and cosmetics, with improved retention of core materials and environmental compatibility.
Implementation Method 1
the surface of the barrier layer enclosing the core material is treated with an emulsion stabilizer, in particular a copolymer containing certain acrylic acid derivatives, leads to an improved deposition of the stability layer
Data Source
AI summary
Compositions selected from detergents and cleaning agents and cosmetic agents are described. The compositions include biodegradable microcapsules including a core material and a shell. The shell includes at least one barrier layer and one stability layer. The barrier layer surrounds the core material. The stability layer includes at least one biopolymer, and is arranged on the outer surface of the barrier layer. An emulsion stabilizer is arranged at the transition between the barrier layer and the stability layer. Use of these agents is also described.