氯硅烷残液酸性水解制备二氧化硅特性研究

发布时间：2018-05-25 08:28

  本文选题：氯硅烷残液 + 酸性水解　； 参考：《无机盐工业》2017年08期

【摘要】：以氯硅烷残液为原料,盐酸为水解剂制备二氧化硅,探讨了盐酸浓度、反应温度、Si O2浓度对水解体系胶凝时间的影响,从而确定了适宜的水解条件:盐酸初始浓度为10%(质量分数)、二氧化硅质量分数为2%、反应温度为35℃。利用XRF、XRD、SEM、激光粒度分析仪、IR、TG-DSC-MS对所制备的Si O2的化学组成、相组成、形貌、粒径、化学结构、热稳定性进行测试和表征。结果表明,氯硅烷残液酸性水解制备的Si O2为非晶态,纯度达90%以上,平均粒径为34.5μm,加热后质量损失率为1.9%,具有成为橡胶补强Rd的潜力。
[Abstract]:Silica was prepared from chlorosilane residue solution and hydrochloric acid as hydrolysis agent. The effects of hydrochloric acid concentration and reaction temperature on gelation time of hydrolysis system were discussed. The optimum hydrolysis conditions were determined as follows: the initial concentration of hydrochloric acid was 10% (mass fraction), the mass fraction of silica was 2 kum, and the reaction temperature was 35 鈩，

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