Cleansing Composition Microemulsion Core for Perfume Retention
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Solution Overview
Problem
Current skin cleansers fail to effectively deliver perfume scent during use and retain residual scent on the skin due to perfume's solubilization in surfactant micelles, leading to inefficient perfume delivery and short-lasting fragrance.
Innovation Solution
Formulating a rinse-off cleansing composition with a surfactant, hydric solvent, and water that forms a microemulsion phase during use, allowing perfume to exist in a central core region and increasing its activity coefficient, thereby enhancing initial perfume perception and retention on the skin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If perfume is solubilized in surfactant micelles for delivery during cleansing, then perfume can be included in the composition, but perfume activity coefficient decreases leading to reduced fragrance bloom and retention
Solution Approach 1:
The invention segments the micelle structure into distinct regions: a hydrophobic core for perfume solubilization and a hydrophilic shell for water interaction. This segmentation allows perfume to be contained in the core where it maintains higher activity coefficient, preventing the loss of fragrance bloom and retention that occurs in conventional micelle structures.
Solution Approach 2:
The invention applies local quality by creating a specific microenvironment within the micelle core that is optimized for perfume solubilization. The hydrophobic core provides a localized region with appropriate polarity and structure to maintain perfume activity, while the overall micelle structure maintains its cleansing function in the aqueous phase.
2Stability of the object's composition
If conventional micelle structures are used to solubilize perfume, then composition stability is maintained, but perfume bloom and skin retention are significantly reduced
Solution Approach 1:
By segmenting the micelle into a hydrophobic core and hydrophilic shell, the invention creates a stable compartmentalized structure that simultaneously maintains composition stability and enhances fragrance duration. The core stabilizes the perfume while the shell maintains colloidal stability in the aqueous phase.
Solution Approach 2:
The invention uses composite material principles by combining surfactant molecules with specific hydrophobic and hydrophilic characteristics to create a micelle structure that exhibits both compositional stability and enhanced fragrance performance. The composite nature of the micelle allows it to fulfill multiple functions simultaneously.
3Illumination intensity
If perfume concentration is increased to enhance fragrance bloom, then initial scent perception improves, but composition becomes unstable and perfume precipitates
Solution Approach 1:
The segmented micelle structure with its hydrophobic core provides a dedicated compartment for high-concentration perfume solubilization. This segmentation allows the composition to maintain stability even at high perfume concentrations, as the core isolates the perfume from the aqueous phase where precipitation would occur.
Solution Approach 2:
The micelle structure acts as an intermediary between the hydrophobic perfume molecules and the hydrophilic aqueous phase. This intermediary structure allows high concentrations of perfume to be incorporated while maintaining overall composition stability, as the micelle shields the perfume from direct contact with water that would cause precipitation.
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 composition achieves significantly increased perfume bloom and retention on the skin for several hours after cleansing, with perfume concentrations in the headspace and on the skin being up to three times higher than in traditional micelle-based compositions.
Implementation Method 1
Formulating a rinse-off cleansing composition with a surfactant, hydric solvent, and water that forms a microemulsion phase during use
Data Source
AI summary
Methods for enhancing fragrance on skin upon initial application of a rinse-off cleansing composition can include combining surfactant, perfume, solvent, and water, to form the composition, wherein the composition has a total GCMS count higher than that of a control where the solvent is replaced with water when the total GCMS count is measured in accordance with the PSHAM method immediately following the initial application.