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- Title
Synthesis, Characterization, and Flocculation Studies of β‐Cyclodextrin‐Based Stimuli‐Responsive Star Copolymer: An Environmental Remediation.
- Authors
Kiran; Koyilapu, Rambabu; Tiwari, Rudramani; Krishnamoorthi, Subramanian; Kumar, Krishna
- Abstract
Thermoresponsive star polymers are synthesized by using poly(NIPAM‐b‐DMA) diblock copolymer and β‐cyclodextrin (β‐CD). The synthesis of thermoresponsive diblock copolymer (TRP) is carried out by reversible addition–fragmentation chain transfer mediated aqueous polymerization using N‐isopropylacrylamide (PNIPAM) and di‐methylacrylamide as monomers. Mercaptopropionic acid is used as in situ chain transfer agent (CTA) to synthesize PNIPAM, i.e., macro‐CTA. The polymeric materials are characterized by Fourier‐transform infrared spectroscopy, gel permeation chromatography, 1H‐NMR, particle size measurement, scanning electron microscopy, thermogravimetric analysis, UV–vis spectroscopy, and X‐ray diffraction analysis. PNIPAM, TRP, and b‐CD grafted thermoresponsive diblock copolymer (β‐CD‐TRP) show lower critical solution temperature at 32.8, 34.3, and 36.8 °C, respectively. TRP and β‐CD‐TRP are also studied for the removal of model contaminant (kaolin). Among all grades, β‐CD‐TRP 4 shows the best performance in the removal of kaolin from aqueous solution at 25 and 50 °C.
- Subjects
THERMORESPONSIVE polymers; DIBLOCK copolymers; ENVIRONMENTAL remediation; PARTICLE size determination; STAR-branched polymers; GEL permeation chromatography; ULTRAVIOLET-visible spectroscopy; SCANNING electron microscopy
- Publication
Global Challenges, 2020, Vol 4, Issue 7, p1
- ISSN
2056-6646
- Publication type
Article
- DOI
10.1002/gch2.201900089