β-Cyclodextrin-derived diallylamine salt: Synthesis and its copolymerizations.

Area of Science:

• Polymer Chemistry
• Supramolecular Chemistry
• Environmental Science

Background:

• Cyclopolymerization is a versatile method for creating polymers with unique architectures.
• Beta-cyclodextrin (β-CD) is a well-known host molecule capable of forming inclusion complexes with various guest molecules.
• Developing advanced materials for environmental remediation is crucial for addressing water pollution.

Purpose of the Study:

• To synthesize and characterize novel cyclopolymers bearing β-CD substituents.
• To investigate the copolymerization of β-CD-containing monomers with other functional monomers.
• To explore the potential of these polymers for the removal of organic micropollutants from aqueous solutions.

Main Methods:

• Synthesis of a diallylamine salt monomer functionalized with β-CD.
• Cyclopolymerization and copolymerization of the β-CD monomer with other vinyl monomers (e.g., quaternary ammonium salts, amino acid derivatives, phosphonates).
• Terpolymerization with sulfur dioxide (SO2) to introduce alternating SO2 units.
• Characterization of polymer properties, including solution behavior and viscosity.
• Evaluation of the removal efficiency of the organic micropollutant 2-naphthol using a specific terpolymer.

Main Results:

• Successful synthesis of a novel β-CD-substituted diallylamine salt monomer.
• Formation of copolymers and terpolymers with controlled incorporation of β-CD and other functional groups (glycine, methyl phosphonate, aspartic acid, SO2).
• Demonstration of pH-responsive behavior in the synthesized polyzwitterions.
• Effective removal of 2-naphthol from water by a water-insoluble terpolymer containing β-CD residues, attributed to host-guest complexation.
• Potential for developing cross-linked polymers for simultaneous removal of organic micropollutants and metal ions.

Conclusions:

• The study presents a novel approach to synthesizing β-CD-containing cyclopolymers.
• These polymers exhibit promising capabilities for adsorbing organic micropollutants through supramolecular interactions.
• The developed materials offer a foundation for creating multifunctional polymers for environmental remediation applications, including the simultaneous removal of diverse contaminants.