Poly(arylene ether) copolymer with cation-exchange groups for water treatment
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Solution Overview
Problem
Current ion exchange resins have limited ion exchange capacity, reduced processability due to crosslinking, and degrade when exposed to high temperatures, limiting their applications in fields like water treatment and protein separation.
Innovation Solution
A poly(arylene ether) copolymer with a cation-exchange group is developed, featuring a quinoxaline compound copolymerized with specific dihydroxy and dihalide monomers, allowing for controlled introduction of sulfonic acid, phosphoric acid, or carboxyl groups, which enhances mechanical properties and ion exchange capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a styrene-based resin with three dimensional network structure is used, then chemical stability to strong acids and bases is improved, but thermal stability deteriorates when heated to 150°C or more
Solution Approach 1:
The patent uses a composite structure combining a three-dimensional network polymer backbone with thermally stable aromatic rings (quinoline, pyridine, triazine) and sulfur-containing groups. This composite material approach allows the resin to maintain chemical stability from the crosslinked network structure while gaining thermal stability from the aromatic heterocyclic components that resist thermal degradation.
Solution Approach 2:
The patent changes the chemical composition parameters by introducing specific heterocyclic aromatic rings (quinoline, pyridine, triazine) and sulfur-containing functional groups into the polymer structure. These parameter changes in molecular composition enhance the thermal stability of the resin, allowing it to maintain exchange capacity at temperatures where conventional styrene resins decompose.
2Reliability
If crosslinking agents are used to create three dimensional network structure, then chemical stability is improved, but processability deteriorates
Solution Approach 1:
The patent applies local quality by introducing functional groups (quinoline, pyridine, triazine, sulfur-containing groups) at specific positions within the polymer chain rather than uniform crosslinking throughout. This localized functional group distribution provides chemical stability where needed while maintaining linear chain segments that preserve processability and solubility.
Solution Approach 2:
The patent segments the polymer structure into distinct functional units: the three-dimensional network provides chemical stability while the linear poly(arylene ether) segments with heterocyclic groups maintain processability. This segmentation allows different parts of the polymer to fulfill different functions - crosslinked regions for stability and linear regions for processing.
3Reliability
If conventional ion exchange resins are used, then basic ion exchange function is provided, but ion exchange capacity is limited
Solution Approach 1:
The patent creates multi-functional ion exchange resin by incorporating multiple types of functional groups (basic nitrogen-containing groups from quinoline/pyridine/triazine and acidic sulfur-containing groups) into a single polymer structure. This universal resin can perform both cation and anion exchange functions simultaneously, greatly expanding ion exchange capacity compared to conventional single-function resins.
Solution Approach 2:
The patent combines basic nitrogen-containing heterocyclic groups and acidic sulfur-containing groups within the same polymer matrix to create a composite ion exchange material. This composite structure enables simultaneous cation and anion exchange capabilities, multiplying the ion exchange capacity beyond what single-function resins can achieve.
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 poly(arylene ether) copolymer exhibits excellent physical characteristics, increased ion exchange capacity, and improved metal ion adsorption, maintaining stability across various temperatures and pH levels, making it suitable for diverse applications including water treatment and protein separation.
Implementation Method 1
Ion exchange occurs when ions are diffused in the space of the fine pores
Implementation Method 2
ions are diffused in the space of the fine pores
Implementation Method 3
increased ion exchange capacity, and improved metal ion adsorption
Data Source
AI summary
The present invention relates to a poly(arylene ether) copolymer having a cation exchange group, a method for manufacturing the same, and use thereof. The poly(arylene ether) copolymer having the cation exchange group according to the present invention has excellent physical characteristics, ion exchanging capacity, metal ion adsorption capacity and a processability, and thus can be molded in various shapes and can be extensively applied to various fields such as recovering of organic metal, air purification, catalysts, water treatment, medical fields and separating of proteins.