以无碱玻璃纤维为原料, 采用酸沥滤工艺制备了高硅氧微纤维, 研究了不同的搅拌形式和搅拌速度对纤维中SiO2含量和纤维宏观形貌的影响。结果表明: 适当提高搅拌速度可以加速分散, 但过高的搅拌速度不仅会造成SiO2含量的降低, 而且会严重影响纤维的长度; 采用双向搅拌, 且搅拌转速在75 r·min-1时, 可以获得SiO2质量分数为97.38%的高硅氧微纤维, 其比表面积为364.59 m2·g-1, 平均孔径为0.73 nm。

Taking E glass fiber as raw material, the acid leaching process was used to preare high silica micro-fiber, the effects of different mixing forms and stir rates on SiO2 content and macrograph of the fiber were studied. The results show that raising mixing rate appropriately could make dispersion accelerating, but the too high mixing rate not only reduced SiO2 content, but also seriously affected the length of the fiber. Under the condition of double-directional mixing and stirring rate of 75 r·min-1, the high silica micro-fibre with SiO2 content of 97.38wt% could be obtained, and the specific surface area and average aperture of the fiber were 364.59 m2·g-1 and 0.73 nm, respectively.