The effect of surface aluminosilicate ions on the properties of colloidal silica

摘要: Abstract Aluminosilicate anionic sites on even a small portion of the surface colloidal silica particles increases stability toward gelling in pH range 3 to 7. The negative charge makes sol more sensitive coagulation by cationic surfactants and positively charged colloids but less reactive with hydrogen-bonding compounds including water-soluble polymers containing hydroxyl ether, or amide groups. Also at aluminosilicate site, accompanying hydrated countercation adjacent solution probably prevents access that region so is limited silanol groups unmodified areas. Proteins coagulate saline do not interact aluminatemodified except lower pH. This may explain some differences physiological cytotoxic effects pure versus presence alumina.