高分子分散剤を添加したCaCO_3-H_2Oサスペンションの流動性に及ぼす無機電解質の影響

概要

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The influences of various types of inorganic salts on the fluidity of CaCO_3 suspensions with comb-type macromolecules containing polyethyleneoxide graft-chains have been investigated. The fluidity of suspension with polymer and the amounts of polymer adsorbed on CaCO_3 are remarkably decreased by the addition of inorganic electrolytes. The decrease for fluidity of suspension is related to the reduction of such adsorbed amounts of polymer. This may be due to the change of polymer conformation by addition of inorganic salts. The fluidity of suspension with K_2CO_3 or K_2HPO_4 is lower than that of suspension with KCl or K_2SO_4. Inorganic electrolytes seem to be in a following order for the reduction effect of fluidity of suspension with polymer;K_2HPO_4≒K_2CO_3>K_2SO_4>KCl. This may be related to the affinity of anions for water. The fluidity of suspension with polymer and K_2CO_3 is improved by the addition of CaO. This is based on the removal of CO_3^<2-> by the reaction of CaO and CO_3^<2->.
社団法人日本セラミックス協会の論文
2000-01-01