Results show that the optimal amount of modifying reagent is 3% in mass, the absorption oil value of per 100 g modified calcium carbonate is 49.4 g, active ratio is up to 99.9%, and specific surface area is 30.32 m~(2)/g.

• 每100g改性纳米碳酸钙的吸油值为49.；4g；活化度高达99