Hetero-phase Polymer Membrane for Breath Analysis Water Removal
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Solution Overview
Problem
Current membranes for water pervaporation in breath analysis systems, such as Nafion®, are expensive, fragile, and inefficient, leading to high costs and reduced performance due to their disposable nature and limited ability to handle high feed water contents.
Innovation Solution
Development of a hetero-phase polymer composition with sulfonic groups, including poly(vinylidene fluoride) (PVDF) and sulfonated polystyrene, which forms a co-continuous phase structure, enhancing water pervaporation efficiency and mechanical stability while being cost-effective and easy to manufacture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional membranes such as Nafion® are used for water pervaporation, then water removal capability is achieved, but the membranes are expensive, fragile, and have limited ability to handle high feed water contents
Solution Approach 1:
The patent uses composite materials by combining PVDF (providing mechanical strength and chemical stability) with sulfonated polystyrene (providing hydrophilic channels for water transport). This composite structure achieves both durability and high water pervaporation performance, resolving the contradiction between membrane reliability and manufacturing ease.
Solution Approach 2:
The patent employs porous PVDF hollow fiber membranes with controlled pore structures that provide both mechanical robustness and efficient water transport pathways. The porous structure allows high feed water content handling while maintaining membrane integrity and reusability, addressing the reliability-manufacturability contradiction.
2Strength
If membrane thickness is increased to improve mechanical strength, then robustness is enhanced, but water pervaporation flux decreases
Solution Approach 1:
The patent applies local quality by creating distinct regions within the membrane: the PVDF matrix provides mechanical strength in the structural framework, while the sulfonated polystyrene domains provide hydrophilic channels for water transport. This spatial differentiation allows simultaneous optimization of strength and flux.
Solution Approach 2:
The composite structure allows the PVDF component to bear mechanical loads while the sulfonated polystyrene component facilitates water transport. This division of functional roles resolves the contradiction between mechanical strength and pervaporation flux.
3Reliability
If disposable membranes are used to ensure reliability, then consistent performance is achieved, but costs increase due to continuous replacement
Solution Approach 1:
The membrane is designed to be self-regenerating through its hydrophilic channels that continuously transport water vapor from the feed side to the permeate side, maintaining performance consistency without requiring replacement. The durable PVDF-sulfonated polystyrene composite structure enables long-term reusable operation.
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 new polymer composition achieves higher water uptake and evaporation rates with improved mechanical properties, maintaining gas component concentrations and reducing costs by being reusable and less prone to defects, thus enhancing breath analysis accuracy and efficiency.
Implementation Method 1
The separation or removal of liquids, such as water, from gases, such as organic gases, is an important process within the chemical, petrochemical, medical and energy industries.
Implementation Method 2
The tube, which may be connected to an adaptor, delivers the gas to a sampling place (such as a sampling chamber). It is preferable that the sampling line is clear of liquids, such as condensed out liquids, in the fluid sample at all times, in order to permit continuous, non-interfered monitoring.
Data Source
AI summary
There is provided herein a dryer polymer substance including a hetero-phase polymer composition including two or more polymers wherein at least one of the two or more polymers include sulfonic groups, wherein the substance is adapted to pervaporate a fluid. The fluid may include water, water vapor or both. There is also provided herein a process for the preparation of a dryer polymer substance adapted to pervaporate a fluid (such as water, water vapor or both) the process includes mixing two or more polymers, wherein at least one of the two or more polymers may include groups which are adapted to be sulfonated, to produce a hetero-phase polymer composition and processing the polymer blend into a desired form.