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Studies from Tongji University Yield New Data on Polymer Physics (Charge-selective separation and recovery of organic ions by polymeric micelles)

July 15, 2014



By a News Reporter-Staff News Editor at Physics Week -- Researchers detail new data in Polymer Physics. According to news reporting originating in Shanghai, People's Republic of China, by VerticalNews journalists, research stated, "Charge-selective separation and recovery of organic ionic dyes by polymeric micelles (PMs) are reported. Branched polyethylenimine (PEI) functionalized with 4-cetyloxybenzaldehyde (CBA) via Schiff-base bonds (PEI@CBA) can extract an anionic dye from cationic contaminants, and transfer it from an aqueous phase into an apolar oil phase, and thus leading to separation."

The news reporters obtained a quote from the research from Tongji University, "While a physical micelle of PAA@PS, with polyacrylic acid (PAA) as core and polystyrene (PS) as shell, can selectively extract a cationic dye from anionic contaminants. When polar, yet nonionic groups are eliminated from the core of a PM, charge selectivity can be significantly enhanced. Although many anionic-cationic dyes can form a poorly water-soluble complex or precipitate, separation is still feasible with a reasonably designed PM. Finally, entrapment of a guest by a PM is found easy but release may be difficult; in this case, PEI@CBA with an acid-sheddable shell, can recover the entrapped guest."

According to the news reporters, the research concluded: "It is also found the encapsulation of a dye is usually accompanied with dye stacking, resulting in a changed UV/vis spectrum."

For more information on this research see: Charge-selective separation and recovery of organic ions by polymeric micelles. Journal of Polymer Science Part B-Polymer Physics, 2014;52(13):872-881. Journal of Polymer Science Part B-Polymer Physics can be contacted at: Wiley-Blackwell, 111 River St, Hoboken 07030-5774, NJ, USA.

Our news correspondents report that additional information may be obtained by contacting D.C. Wan, Tongji Univ, Minist Educ, Key Lab Adv Civil Engn Mat, Shanghai 201804, People's Republic of China. Additional authors for this research include M. Jin and H.T. Pu.

Keywords for this news article include: Asia, Shanghai, Polymer Physics, People's Republic of China

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Source: Physics Week


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