Shape-Memory Polymer Sensor for Liquid Concentration Detection
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Solution Overview
Problem
Inexpensive and reliable sensors for sensitive and specific detection of compounds are not readily available, making it difficult to quantify their presence accurately.
Innovation Solution
Development of shape memory polymer substrates with programmed polymer structures that change color upon exposure to specific liquids, allowing for visual or device-based detection of liquid presence and concentration using a smartphone for analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional chromogenic sensors are used for detection, then sensitive and specific detection of compounds is achieved, but the sensors are expensive and difficult to quantify
Solution Approach 1:
The patent changes the physical-chemical parameters of the polymer material by incorporating liquid crystal phases and shape memory properties, transforming it from a conventional chromogenic sensor to a multifunctional smart material that provides both detection sensitivity and cost-effectiveness through its inherent optical and mechanical response characteristics
Solution Approach 2:
The patent creates a composite material system combining shape memory polymer, liquid crystal phases, and chromogenic indicators, where the synergistic interaction of these components enables sensitive detection while maintaining low cost and ease of manufacture through a single integrated sensor structure
2Productivity
If shape memory polymer substrate is used, then sensor scalability and reusability are improved, but the polymer structure complexity increases
Solution Approach 1:
The patent segments the polymer structure into distinct functional regions including the shape memory polymer matrix, liquid crystal phase domains, and chromogenic indicator zones, allowing each segment to perform its specific function while enabling scalable manufacturing through modular sensor design and assembly
Solution Approach 2:
The shape memory polymer substrate serves multiple functions simultaneously: it provides the structural framework, enables reversible shape transformation for sensor reset, controls liquid crystal orientation, and facilitates chromogenic response, thereby reducing overall device complexity despite the sophisticated polymer structure
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
Provides scalable, inexpensive, and reusable sensors that can detect the presence and concentration of liquids such as ethanol in various mixtures, including fuels and consumer products, with robust and reliable results.
Implementation Method 1
providing a shape memory polymer substrate including a polymer structure. The polymer structure can be in a programmed state. An area of the polymer structure in the programmed state changes to polymer structure in an activated state upon exposure to the liquid mixture including the first liquid
Implementation Method 2
The area of the polymer structure in the programmed state changes to polymer structure in an activated state when exposed to the liquid mixture including the first liquid
Data Source
AI summary
Described are chromogenic sensors, methods of use, and kits including sensors. The sensors can have a polymer structure with a waveform cross-section in a programmed state. Upon exposure to a first liquid, the polymer structure in the programmed state changes to polymer structure in an activated state. Methods for measuring the presence of a liquid using the sensor are described, as are kits including the sensors.