TAED Encapsulation in Liquid Detergent via Interpolymer Complex
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Solution Overview
Problem
Tetraacetylethylenediamine (TAED) loses effectiveness in liquid detergent formulations due to hydrolysis, forming N, N' diacetylethylenediamine, which is not effective as a detergent active, making it unsuitable for use in aqueous systems without modification.
Innovation Solution
A detergent additive comprising 75 weight percent or less TAED encapsulated within an interpolymer complex that includes both proton-accepting and proton-donating polymers, enhancing hydrolytic stability and maintaining TAED's effectiveness in aqueous formulations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If TAED is used in liquid detergent formulations containing water, then it provides bleaching activation function, but it undergoes hydrolysis and loses effectiveness
Solution Approach 1:
TAED is encapsulated within microcapsules that have a core-shell structure. The active TAED is nested inside the microcapsule core, protected from water and hydrolysis, while still being able to function when released during washing.
Solution Approach 2:
The microcapsule shell acts as an intermediary barrier between TAED and water. This intermediate structure prevents direct contact between TAED and aqueous environment, thereby preventing hydrolysis while allowing controlled release of TAED when needed.
2Stability of the object's composition
If TAED is encapsulated in an interpolymer complex, then hydrolytic stability is improved, but the device complexity increases
Solution Approach 1:
The microcapsules are formed using composite materials consisting of an interpolymer complex shell made from specific polymers (e.g., polyacrylic acid, polyvinyl alcohol) that provide both structural integrity and controlled release properties, combining multiple material functions in a single encapsulation system.
Solution Approach 2:
The encapsulation system allows changing the release parameters of TAED by adjusting the microcapsule shell composition and structure. The interpolymer complex can be designed with specific molecular weights, cross-linking densities, and polymer ratios to control release rate and stability characteristics.
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 of TAED within an interpolymer complex significantly improves its long-term stability and release profile, ensuring TAED remains effective as a peroxy bleach activator in liquid detergents, with high encapsulating efficiency and controlled release during washing.
Implementation Method 1
the interpolymer complex comprising both a proton-accepting-(co)polymer and a proton-donating (co)polymer; wherein the active is encapsulated
Data Source
AI summary
A detergent additive comprising an active comprising one or both of tetraacetylethylenediamine, triacetylethylenediamine; and an interpolymer complex, the interpolymer complex comprising both a proton-accepting-(co)polymer and a proton-donating (co)polymer.