Journal article
Temperature-responsive solid-liquid separations with charged block-copolymers of poly(N-isopropyl acryamide)
JP O'Shea, GG Qiao, GV Franks
Langmuir | AMER CHEMICAL SOC | Published : 2012
DOI: 10.1021/la2038872
Abstract
Temperature responsive charged block-copolymers of poly(N- isopropylacrylamide) (PNIPAM) have been used in the solid-liquid separation of alumina mineral particles from aqueous solution. The effects of temperature, polymer charge-sign and fraction of charged segment have been investigated. Batch settling and adsorption studies showed that rapid sedimentation results for suspensions with polymers of opposite charge-sign to the particle surface-charge (counterionic) at 50 °C. Cooling the suspensions after flocculation at 50 °C was found to increase the final solids volume fraction of the sediment beds formed through a mechanism related to partial desorption of polymer and the reduction of the ..
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Awarded by Australian Research Council Linkage Scheme (Australian Mineral Science Research Institute)
Awarded by AMIRA International
Funding Acknowledgements
The authors acknowledge financial support from the Australian Research Council Linkage Scheme (Australian Mineral Science Research Institute, LP0667828), AMIRA International, and the sponsors of AMIRA International Project P924: BHP Billiton, Rio Tinto, Orica Explosives, Anglo Platinum, Xstrata Technology, Freeport McMoran, and AREVA NC.