pH tempted Micellization of β-Cyclodextrin based Diblock copolymer and its application in solid/liquid separation

• Published in: Journal of polymer research 2020-06, Vol.27 (6), Article 150
• Main Authors: Kiran, Kiran, Tiwari, Rudramani, Tungala, Kranthikumar, Krishnamoorthi, S., Kumar, Krishna
• Format: Article
• Language: English
• Subjects: Acrylamide; Addition polymerization; Aqueous solutions; Block copolymers; Chain transfer; Characterization and Evaluation of Materials; Chemical synthesis; Chemistry; Chemistry and Materials Science; Contaminants; Copolymers; Cyclodextrins; Fluorescence; Graft copolymers; Industrial Chemistry/Chemical Engineering; Infrared spectroscopy; Kaolin; NMR; Nuclear magnetic resonance; Original Paper; Polymer Sciences; Separation; Sulfonic acid
• ISSN: 1022-9760; 1572-8935
• DOI: 10.1007/s10965-020-02095-4

This work focuses on facile synthesis of pH responsive diblock copolymers based on acrylamide (AM) and 2-Acrylamido-2-methyl-1-propane sulfonic acid (AMPS) grafted on β-Cyclodextrin and have application in solid/liquid separation. β-CD based chain transfer agent (CTA) has been synthesized by one pot synthesis method. Three different grades of β-Cyclodextrin based Macro CTA were synthesized through RAFT polymerization technique. Macro CTA have been used further in synthesis of five different grades of β-CD grafted pH-responsive diblock copolymers i.e. (β-CD-PRP’s) by varying the amount of AMPS. The polymeric materials were characterized by Fluorescence Spectroscopy, FT-IR, GPC, 1 H-NMR, SEM, TEM, TGA, and XRD. β-CD-PRP’s shows their micellization properties at acidic pH  0.336 mg/mL and has also been studied for removal of model contaminant (kaolin). Among all grades of diblock copolymers, grade 3 shows best performance in the removal of kaolin from aqueous solution at 7 and 5 pH values. Graphical abstract