Thioether Polymers for Heavy Metal Sequestration
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Solution Overview
Problem
There is a need for novel metal sequestration polymers that are chemically flexible and effective in both solid and solution states to improve water quality by removing heavy metal contaminants, which existing polychelatogens do not adequately address, especially in regions with scarce potable water resources.
Innovation Solution
A polymer comprising specific residues with various substituents is developed, which can associate with metals to form a polymer-associated metal complex, allowing for efficient separation of heavy metals from contaminated water solutions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing polychelatogens are used for metal sequestration, then heavy metal removal is achieved, but chemical flexibility and effectiveness in both solid and solution states are insufficient
Solution Approach 1:
The patent modifies the chemical structure of polychelatogen polymers by changing parameters such as introducing sulfur-containing groups (thioethers, thiophenes) and varying the backbone composition. This allows the polymer to maintain effective metal binding in both solid and solution states, resolving the contradiction between adaptability and reliability.
Solution Approach 2:
The invention creates composite polymer structures combining different functional groups (carboxylic acids, thioethers, thiophenes) within the same polymer chain or as copolymers. This composite approach enables the material to exhibit both chemical flexibility for adaptability and maintained sequestration effectiveness across different states.
2Productivity
If polychelatogens are used to sequester heavy metals, then water treatment is achieved, but performance optimization in solid and solution states is limited
Solution Approach 1:
The patent introduces specific functional groups at localized positions within the polymer structure. For example, sulfur-containing groups are positioned to provide strong metal affinity while maintaining overall polymer solubility and processability, enabling performance optimization in both solid and solution states for improved water treatment efficiency.
Solution Approach 2:
The polymer design allows dynamic adjustment of conformation and accessibility of binding sites depending on the state (solid or solution). The flexible polymer chains can adapt their structure to maximize metal binding efficiency in different environments, enhancing both productivity and adaptability.
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 polymer effectively retains heavy metals, such as lead, even after multiple washes, demonstrating high binding capacity and potential for optimizing water quality by removing contaminants from aqueous solutions.
Implementation Method 1
the polymer associates with metals to form a polymer associated metal complex
Data Source
AI summary
The invention provides a polymer comprising two or more residues of formula III or IV or salts thereof: wherein dash line, X, Y, Q, L, M, n, R1, R2, Ra, Rb, Rc and Rd have any of the values defined in the specification, as well as synthetic intermediates and synthetic methods useful for preparing the compounds. The polymer is useful to treat contaminated water by chelating metal.