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筛选出了适合于在水中分散的纳米碳酸钙,分别考察了分散机转速、分散剂种类、分散剂用量、分散时间和悬浮液浓度等因素对纳米CaCO3在水中分散的影响,优化出了纳米CaCO3在水中分散的工艺条件,即:转速为 7 500 r/min,分散剂为PK-100,分散时间为1．5 h,分散剂用量为纳米CaCO3质量的3％,悬浮液浓度为15％．结果表明,优化条件下所制得的悬浮液黏度较低,纳米CaCO3平均粒径较小,分散均匀,且贮存稳定性良好．添加了该纳米 CaCO33浆液的复合建筑涂料的耐沾污性、耐洗刷性、触变性、耐水性、耐碱性和耐老化性等得到了显著改善．
The suitable nano-calcium carbonate dispersed in water was selected. The effects of disperser rotation speed, dispersant type, dispersant dosage, dispersion time and suspension concentration on the dispersion of nano-CaCO3 in water were investigated. Dispersing process conditions in water, namely: speed of 7 500 r / min, dispersant PK-100, the dispersion time of 1.5 h, the amount of dispersant 3% of the mass of nano-CaCO3, the suspension concentration of 15%. The results show that the viscosity of suspension prepared under the optimal conditions is low, the average particle size of nano-CaCO3 is smaller, the dispersion is uniform, and the storage stability is good. The addition of the nano CaCO33 slurry composite architectural coatings stain, scrub resistance, thixotropy, water resistance, alkali resistance and aging resistance has been significantly improved.