Polymer Electrolyte for Stable Half-Cell Measurements
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Solution Overview
Problem
Existing polymer electrolytes for electrochemical half-cells suffer from low stability against acids and bases, poor hydrolysis stability, and low polarity, which can lead to errors and interruptions in electrochemical measurements.
Innovation Solution
Development of polymer electrolytes formed by polymerizing N-acryloyl-amino-ethoxy-ethanol with additional monomer components such as hydroxyl-alkyl-methacrylates and silylized alkyl-methacrylates, which enhance stability and polarity, and can be used in solid form to prevent leakage and contamination, suitable for use in both aqueous and organic solvents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polymer electrolytes based on N-substituted acrylamides and/or methacrylates are used, then the electrolyte can prevent liquid flow and contamination, but the electrolyte exhibits unsatisfactory stability against acids and bases, poor stability against hydrolysis, and low polarity
Solution Approach 1:
The patent changes the chemical parameters of the polymer electrolyte by selecting specific monomers (acrylamides and/or methacrylates with particular N-substituents) that provide enhanced stability against hydrolysis and acids/bases while maintaining the desired functional properties
Solution Approach 2:
The patent uses composite polymer structures formed by copolymerization of different monomers (acrylamides and/or methacrylates) to achieve a balance of properties including hydrolysis stability, acid/base stability, and polarity
2Reliability
If a liquid connection with porous diaphragm is used, then substance exchange between measurement medium and reference electrolyte can be reduced, but the pores can become contaminated or obstructed leading to errors and interruptions
Solution Approach 1:
The patent extracts the problematic porous diaphragm component and replaces it with a polymer electrolyte that provides the necessary separation function without having pores that can become contaminated or obstructed
Solution Approach 2:
The polymer electrolyte acts as an intermediary substance that allows ionic conduction while preventing direct contact and contamination between the measurement medium and reference electrolyte, eliminating the need for porous diaphragms
3Device complexity
If polymer electrolytes with low polarity are used, then the electrolyte structure is simpler, but the electrolyte performance in electrochemical measurements is reduced
Solution Approach 1:
The patent optimizes the polarity parameter of the polymer electrolyte by selecting monomers with appropriate polar groups (acrylamides and/or methacrylates) to achieve sufficient polarity for good electrochemical performance while maintaining a relatively simple electrolyte 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
The new polymer electrolytes demonstrate improved resistance to acids and bases, enhanced stability in water and organic solvents, and prolonged lifespan of electrochemical half-cells with better pressure and wash-out resistance, maintaining stable potentials for potentiometric and amperometric measurements.
Implementation Method 1
a polymer electrolyte that is present in the form of a hydrogel containing for example a saturated aqueous solution of potassium chloride
Implementation Method 2
a polymer electrolyte that is present in the form of a hydrogel containing for example a saturated aqueous solution of potassium chloride
Data Source
AI summary
A polymer electrolyte for an electrochemical half-cell, such as a reference half-cell, contains a polymer which can be produced by polymerization of N-acryloyl-amino-ethoxy-ethanol or by co-polymerization of N-acryloyl-amino-ethoxy-ethanol with at least one further monomer component.