An Ft-ir Study of Calcium-exchanged Montmorillonite Treated With Polyacrlamide and Polyethylene Oxide.
Miner and Metall of Proc 1990 Nov; 7(4):206-208
The U.S. Bureau of Mines is using fourier-transform infrared (ft-ir) analysis to investigate the bonding mechanism that occurs during the dewatering of clay slurries. High-molecular-weight polymers are used as flocculating agents in these processes. This investigation presents the results of an ft-ir study of calcium-exchanged montmorillonite treated with polyacrylamide (pam) and polyethylene oxide (peo). Both thin film and attenuated total reflectance (atr) spectroscopic techniques were employed to study this clay-polymer system. Results suggest pam is adsorbed to the clay via the nitrogen atom of the polymer. A water bridge is involved in the bonding between the clay and peo. Evidence also suggests that peo may be adsorbed directly onto the surface of the clay.
Miner. and Metall. of Proc., V. 7, No. 4, Nov. 1990, PP. 206-208