TY  - JOUR
AU  - O'Shea, J-P
AU  - Qiao, GG
AU  - Franks, GV
Y2  - 2014/05/22
Y1  - 2012/01/10
SN  - 0743-7463
UR  - http://hdl.handle.net/11343/32611
AB  - 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 hydrophobic attraction. Suspension stability results after dosing with polymers of similar charge-sign to the particle surface-charge (co-ionic) at both 25 and 50 °C. Increasing the amount of polymer charge increased the influence of polymer charge-sign on the adsorption and solid-liquid separation behavior. The performance of the charged block copolymers are compared to that of the random charged copolymer and neutral homopolymer PNIPAM structures.
LA  - English
PB  - AMER CHEMICAL SOC
KW  - Polymerisation Mechanisms; Chemical Engineering not elsewhere classified; Expanding Knowledge in Engineering
T1  - Temperature-Responsive Solid-Liquid Separations with Charged Block-Copolymers of Poly(N-isopropyl acryamide)
DO  - 10.1021/la2038872
IS  - Langmuir: the ACS journal of surfaces and colloids
VL  - 28
IS  - 1
SP  - 905-913
L1  - /bitstream/handle/11343/32611/284063_15516.pdf?sequence=1&isAllowed=n
ER  -