钛酸酯对电气石粉体的表面改性及表征

以沉降时间、吸油值、吸光度等为评价参数，优化了钛酸酯偶联剂对电气石粉体表面有机化改性的工艺条件。确定以蒸馏水作溶剂，钛酸酯的用量为电气石质量的4%，反应体系pH值为9，矿浆固液比为10:50，60℃下反应1.0h，所得改性电气石在液体石蜡中的沉降时间由原电气石的14min延长到467min；电气石表面的有机改性只降低了电气石表面的极性，而不改变电气石的晶体结构，且改性电气石的负离子释放量增加为未改性电气石的1.75倍。 

Surface Modification and Characterization of Tourmaline Powder by Titanate Coupling Agent

The surface organic modification of tourmaline powder with titanate coupling agent was studied in detail with the parameters of settling time,oil absorption value and absorbance,and the optimal technological conditions were determined as 4%(of the mass of tourmaline powder)of titanate coupling agent with the solid/liquid ratio 10:50 of the ore slurry reacted at 60℃ for 1.0h in distilled water of pH9,and the settling time of modified tourmaline increased to 467min from 14min of raw tourmaline in liquid paraffin.The characterization of structure showed that surface organic modification has only reduced the surface polarity of tourmaline,but not altered the crystal structure of tourmaline,and the amount of released negative ions of modified tourmaline was 1.75 times of raw tourmaline.