V. Bobacka et al., INTERACTIONS BETWEEN CATIONIC STARCH AND ANIONIC TRASH OF A PEROXIDE-BLEACHED TMP AT DIFFERENT SALT CONCENTRATIONS, Journal of pulp and paper science, 24(3), 1998, pp. 78-81
The consumption of cationic starch of medium-charge density by dissolv
ed and colloidally dispersed wood substances from a peroxide-bleached
TMP was evaluated at different concentrations of a monovalent and a di
valent ion, respectively. The consumed amount of starch was, in genera
l, reduced upon an increase in salt concentration. By addition of the
starch, destabilization of stable colloidal wood substances could be o
btained. Addition of cationic starch was necessary to obtain destabili
zation at all evaluated concentrations of the monovalent ion, although
only partial destabilization was reached at the highest ionic strengt
h, 10(-1) mol/L. Complete destabilization was achieved at all evaluate
d concentrations of the divalent ion. However, at the highest concentr
ation of the divalent ion, 10(-2)-10(-1) mol/L, the colloidal wood sub
stances were already destabilized upon addition of the salt.