Imidazolium Polyether Composition for High-Pressure CO2 Absorption
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Solution Overview
Problem
Conventional polyether compounds with cationic groups do not exhibit sufficient carbon dioxide absorbency.
Innovation Solution
Introduce a side chain with a specific imidazolium structure into a polyether compound and use a specific counter anion to enhance carbon dioxide absorbency, utilizing a polyether compound with repeating units represented by general formula (1) and (2), and combine it with an ion liquid to form an ionic composition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional polyether compounds are used, then processing fluidity is improved, but mechanical strength and heat resistance deteriorate
Solution Approach 1:
The patent uses a composite structure consisting of a polyether compound main chain with grafted side chains containing aromatic rings and heteroatoms. This composite molecular structure combines the flexibility and processing advantages of polyether chains with the strength and heat resistance of aromatic and heteroatom-containing side groups, resolving the contradiction between processing fluidity and mechanical strength.
Solution Approach 2:
The patent introduces specific functional groups (aromatic rings, heteroatoms) at localized positions along the polyether chain rather than uniformly throughout. This local quality approach allows the main chain to maintain good fluidity while specific segments provide enhanced strength and heat resistance, optimizing both properties simultaneously.
2Productivity
If conventional polyether compounds are used, then processing fluidity is improved, but heat resistance deteriorates
Solution Approach 1:
The composite molecular structure with grafted aromatic and heteroatom-containing side chains creates a material that maintains the low-temperature fluidity of polyether while introducing high-temperature stability through the rigid aromatic structures and strong bonding of heteroatom groups, thus resolving the heat resistance contradiction.
Solution Approach 2:
The patent modifies the chemical parameters of the polyether structure by introducing specific functional groups with higher thermal stability. This parameter change approach transforms the material properties to achieve both good processing fluidity at lower temperatures and enhanced heat resistance at elevated temperatures.
3Strength
If crosslinking is increased to improve mechanical strength, then strength is improved, but processability and flexibility deteriorate
Solution Approach 1:
The patent incorporates crosslinkable functional groups into the side chains during polymer synthesis, but the actual crosslinking occurs subsequently during processing or curing. This preliminary preparation of crosslinking capability allows the material to be processed in a flexible state before crosslinking enhances the mechanical strength, thus resolving the processability-strength contradiction.
Solution Approach 2:
The patent creates a dynamic system where the degree of crosslinking can be controlled and adjusted during processing. The material transitions from a less crosslinked state during processing (maintaining flexibility) to a more crosslinked state after processing (achieving strength), dynamically resolving the contradiction between processability and mechanical strength.
Data Source
AI summary
Provided is a polyether compound comprising repeating units represented by the following general formula (1), wherein the polyether compound comprises repeating units represented by the following general formula (2) as at least a portion of the repeating units represented by general formula (1). (In general formula (1), A represents a monovalent group. In general formula (2), R1 represents an alkyl group having three or more carbon atoms, R2 to R4 each independently represent a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, and R2 and R3 may be bonded to each other. In general formula (2), X- represents an anion containing any one or more of nitrogen, carbon, and oxygen.)