Polymeric Ionic Resin Composition for PFAS Removal and Catalysis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing ion exchange resins are ineffective in efficiently removing PFAS and heavy metals from water streams and have limitations in temperature stability for organic transformations.
Innovation Solution
Development of polymeric ionic resins synthesized by reacting crosslinked chloromethylated polystyrene resin with polyamine and installing ionic groups through aza-Michael addition, forming polymers with specific repeat units for enhanced contaminant removal and catalytic capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional ion exchange resins are used for PFAS removal, then some contaminant removal is achieved, but removal efficiency is insufficient and cost-effective is poor
Solution Approach 1:
The patent creates composite ionic resin materials by combining crosslinked polystyrene resin with polyamine functional groups and ionic groups (carboxylate, sulfate, phosphate, or amino acid derivatives). This composite structure integrates the advantages of each component: the crosslinked polystyrene provides structural stability and porosity, the polyamine provides multiple binding sites, and the ionic groups provide selective affinity for PFAS and heavy metals, achieving superior removal efficiency compared to conventional single-function resins.
Solution Approach 2:
The patent introduces ionic groups at specific locations on the polyamine functional groups of the resin structure. The ionic groups (carboxylate, sulfate, phosphate, or amino acid derivatives) are installed on the polyamine functional groups through aza-Michael addition reaction, creating localized high-affinity sites for contaminant binding. This local concentration of functional groups with specific properties enhances the overall removal efficiency for target contaminants.
2Adaptability or versatility
If existing ion exchange resins are used for organic transformations, then catalytic activity is provided, but temperature stability is insufficient
Solution Approach 1:
The patent creates composite ionic resin materials by combining crosslinked polystyrene resin with polyamine functional groups and ionic groups (carboxylate, sulfate, phosphate, or amino acid derivatives). This composite structure integrates the advantages of each component: the crosslinked polystyrene provides structural stability and porosity, the polyamine provides multiple binding sites, and the ionic groups provide selective affinity for PFAS and heavy metals, achieving superior removal efficiency compared to conventional single-function resins.
Solution Approach 2:
The patent introduces ionic groups at specific locations on the polyamine functional groups of the resin structure. The ionic groups (carboxylate, sulfate, phosphate, or amino acid derivatives) are installed on the polyamine functional groups through aza-Michael addition reaction, creating localized high-affinity sites for contaminant binding. This local concentration of functional groups with specific properties enhances the overall removal efficiency for target contaminants.
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 resins effectively remove PFAS and heavy metals from water and function as stable catalysts for organic reactions, offering improved efficiency and cost-effectiveness.
Implementation Method 1
Ion exchange sites are provided throughout the polymer matrix. Each ion exchange site includes a functional group of either positively-charged ions (cations) or negatively-charged ions (anions) affixed to the polymer network. These functional groups readily attract ions of an opposing charge.
Implementation Method 2
The negatively charged ions of the PFAS are attracted to the positively charged anion resin, causing the PFAS to deposit onto the surface of the resin beads and in effect removing the PFAS from the water.
Implementation Method 3
Ion exchange resins can be used as acid or base catalysts in various organic transformations including etherification, hydration, dehydration, esterification, alcoholysis, inversion of sugar, and the like.
Data Source
AI summary
The present disclosure is generally directed to polymers comprising repeat units having the structures of Formulae 1, 2, and 3. These polymers are used in methods of removing contaminants, including PFAS and heavy metals, from an aqueous fluid comprising contacting the aqueous fluid with the polymer and in methods of catalyzing an organic transformation comprising contacting a fluid with a catalytic amount of the polymer.