Polyarylene Ether Sulfone Membranes via Biobased Diol Copolymerization
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Solution Overview
Problem
Current polyarylene ether sulfones derived from biobased diols lack high molecular weight and hydrophilicity, limiting their suitability for membranes with good separation properties and high permeability, especially for use in contact with water or food production liquids.
Innovation Solution
A polyarylene ether sulfone is developed comprising isosorbide, isomannide, or a mixture thereof, combined with a difunctional non-sulfonated dihalodiaryl sulfone and a sulfonated dihalodiaryl sulfone, which are polymerized to achieve high molecular weight and hydrophilicity, suitable for membrane production with enhanced separation and permeability properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If polyarylene ether sulfones are derived from biobased diols, then environmental sustainability is improved, but molecular weight and hydrophilicity are insufficient
Solution Approach 1:
The patent employs composite materials by combining biobased diols (isosorbide, isomannide, isoidide) with sulfonated dihalodiarylsulfones to create a copolymer structure. This composite approach allows the polymer to simultaneously achieve high molecular weight, enhanced hydrophilicity through sulfonate groups, and environmental sustainability from biobased content, resolving the contradiction between sustainability and performance
2Ease of manufacture
If conventional polyarylene ether sulfones are used, then processing is simplified, but separation properties and permeability are insufficient for membrane applications
Solution Approach 1:
The patent applies local quality by introducing sulfonate groups at specific locations within the polymer structure through sulfonated dihalodiarylsulfone monomers. These localized polar groups enhance hydrophilicity and create hydrophilic channels within the membrane, improving separation properties and permeability while maintaining the overall polymer processability
3Reliability
If high hydrophilicity is achieved through sulfonation, then membrane permeability is improved, but reaction time increases beyond industrially acceptable limits
Solution Approach 1:
The patent applies preliminary action by using pre-sulfonated dihalodiarylsulfone monomers that already contain sulfonate groups before polymerization. This eliminates the need for post-polymerization sulfonation steps, achieving high hydrophilicity and membrane permeability directly during the polymerization process within industrially acceptable reaction times
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 resulting polyarylene ether sulfone exhibits high molecular weight, high hydrophilicity, and improved separation properties, making it suitable for membranes that can be used in contact with water or food production liquids, while also being manufactured efficiently within industrially acceptable reaction times.
Implementation Method 1
a polyarylene ether sulfone which comprises in polymerized form A) isosorbide, isomannide, isoidide or a mixture thereof, and B) least one difunctional compound comprising at least one non-sulfonated dihalodiaryl sulfone, and C) at least one sulfonated dihalodiaryl sulfone
Data Source
AI summary
A polyarylene ether sulfone comprising in polymerized form A) isosorbide, isomannide, isoidide or a mixture thereof and B) at least one nonsulfonated dihalodiaryl! sulfone (compound B) and C) at least one sulfonated dihalodiaryl sulfone (compound C), a process for its preparation and its use in the preparation of coatings, films, fibers, foams, membranes or molded articles.