pH-Induced Color-Changing Cleaning Composition
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Solution Overview
Problem
Current cleaning compositions lack an easily perceptible indicator to determine when sufficient time has elapsed for effective cleaning of surfaces, as they do not provide a visual cue for users on the cleaning process.
Innovation Solution
Incorporating pH-induced color-changing colorants in cleaning compositions that remain compatible across a wide pH range, allowing the color to change from a first to a visually distinct second state when the pH is raised, serving as a visual cue for users.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If traditional cleaning compositions are used, then cleaning effectiveness is achieved, but users lack a visual indicator to determine when sufficient cleaning time has elapsed
Solution Approach 1:
The patent incorporates pH-sensitive colorants into the cleaning composition that undergo perceptible color changes in response to pH variations during the cleaning process. The colorant transitions from a first color state at low pH to a second color state at higher pH, providing users with a clear visual indicator of cleaning progress and effectiveness without adding significant complexity to the composition formulation.
2Loss of information
If pH-induced color-changing colorants are added to provide visual indication, then user awareness of cleaning status is improved, but compatibility across wide pH range becomes challenging
Solution Approach 1:
The patent selects colorants from specific chemical families (azo dyes, triarylmethane dyes, xanthene dyes, or indigo dyes) that inherently possess the capability to function across a broad pH range while maintaining stable colorimetric properties. These multi-functional colorants can adapt to varying pH conditions encountered during different cleaning applications, providing reliable visual indication whether the composition is applied to acidic or alkaline surfaces.
Solution Approach 2:
The patent utilizes colorants whose molecular structures allow them to undergo reversible protonation/deprotonation reactions at different pH levels, causing perceptible color changes. By selecting colorants with appropriate pKa values and structural characteristics, the composition can respond to pH changes during the cleaning process while remaining stable and effective across the wide pH range required for different cleaning applications.
3Ease of operation
If cleaning composition interacts with dirt or grime on surfaces, then cleaning action occurs, but users cannot easily detect when the interaction is sufficient
Solution Approach 1:
The patent incorporates pH-sensitive colorants that provide real-time visual feedback to users during the cleaning process. As the cleaning composition interacts with dirt or grime on surfaces, any pH changes are immediately reflected through color transitions, allowing users to visually monitor the cleaning action and determine when sufficient interaction has occurred. This immediate feedback eliminates the need for guesswork or extended waiting periods, enabling users to confidently assess cleaning sufficiency.
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 pH-induced color change in the cleaning compositions provides a clear visual indicator to users, confirming the cleaning action and interaction with dirt or grime on surfaces, enhancing user interaction and cleaning effectiveness.
Implementation Method 1
the cleaning compositions comprise colorants that undergo a perceptible color change that acts as a visual cue to those using the compositions
Data Source
AI summary
A cleaning composition comprises at least one surfactant and at least one colorant. The cleaning composition can have a pH of about 3 or less. The colorant exhibits one of several specified structures at a pH of about 7. A method for cleaning a surface utilizes the cleaning composition.