Fluorescence Lifetime Plastic Water Content Monitoring
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Solution Overview
Problem
Existing methods for determining the water content of plastic samples, such as Karl Fischer titration, are destructive, slow, and not suitable for real-time inline monitoring in manufacturing processes.
Innovation Solution
A method that analyzes the fluorescence properties, particularly the fluorescence lifetime, of plastic samples to determine their water content nondestructively and in real-time, enabling inline monitoring during manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If Karl Fischer titration is used to determine water content, then measurement precision is improved, but the method is destructive and cannot be used for real-time monitoring
Solution Approach 1:
The patent replaces chemical titration methods (Karl Fischer) with optical measurement methods (fluorescence spectroscopy). The fluorescence lifetime of the plastic sample is measured non-destructively, allowing real-time monitoring without consuming or damaging the sample, thus resolving the contradiction between measurement precision and real-time capability
Solution Approach 2:
The patent measures fluorescence lifetime as an alternative parameter that correlates with water content. By monitoring changes in fluorescence lifetime rather than using chemical titration, the method enables continuous, non-destructive measurement while maintaining accuracy, thus achieving both precision and real-time monitoring
2Measurement precision
If Karl Fischer titration is used to determine water content, then measurement precision is improved, but the determination process is slow
Solution Approach 1:
The patent replaces time-consuming chemical titration with rapid optical measurement. Fluorescence lifetime measurement can be performed quickly without the lengthy chemical reaction and titration steps, reducing determination time while maintaining measurement precision through optical detection
Solution Approach 2:
The patent uses fluorescence properties that inherently respond to water content without requiring preliminary chemical preparation. The fluorescence lifetime measurement can be performed directly on the sample, eliminating the time required for chemical reagent preparation and titration procedures
3Measurement precision
If Karl Fischer titration is used to determine water content, then measurement precision is improved, but the sample is destroyed
Solution Approach 1:
The patent replaces destructive chemical titration with non-destructive optical measurement. Fluorescence spectroscopy measures the natural fluorescence properties of the plastic sample without consuming or altering it, allowing the same sample to be reused while maintaining measurement precision
Solution Approach 2:
The patent utilizes the intrinsic fluorescence properties of the plastic sample itself for measurement. The sample's own fluorescence lifetime serves as the measurement parameter, eliminating the need for external chemical reagents that would consume or destroy the sample
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
This method allows for the rapid and nondestructive determination of water content in plastic samples, making it suitable for real-time monitoring and control in industrial manufacturing processes.
Implementation Method 1
the water content of a sample has an influence on the sample's fluorescent behavior and, in particular, on the fluorescence lifetime
Data Source
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AI summary
Provided is a method and a system. The method comprises exposing one or more samples to electromagnetic radiation and determining a parameter which is indicative of a water content of the one or more samples by analyzing one or more fluorescence properties of the one or more samples. The system comprises an apparatus for manufacturing a product from plastic and an inline monitoring device which determines a parameter that is indicative of a water content of the plastic by analyzing one or more fluorescence properties of the plastic.