文档介绍：
加压碳化反应制备胎面二氧化硅补强剂#
庄艺伟,胡晓慧,祝宝,洪燕珍,苏玉忠,王宏涛,李军**
(厦门大学化学化工学院化学工程与生物工程系)
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摘要:本文以硅酸钠水溶液和 CO2 为原料,采用添加表面活性剂等的加压碳化反应制备高
分散二氧化硅。研究了反应压力、反应时间、硅酸钠浓度以及反应温度对二氧化硅产品比表
面积和吸油值的影响。结果表明,以 1 mol/L 的硅酸钠溶液为硅源,在较低压力和 75℃下
反应约 2 小时可以得到比表面积和聚集体结构合适的二氧化硅产品。采用粒径分布法测定实
验样品的分散性能,表明通过超声破碎解聚后有 80%以上的聚集体可以解聚成纳米颗粒。
将实验样品应用于轮胎胎面胶配方并与普通白炭黑对比,结果表明加压碳化反应制备得到的
高分散二氧化硅在轮胎胎面胶中有较好的补强性能,尤其是抗撕裂达到 kgf/cm2,延伸
率可达到 800%以上。
关键词:化学工程;碳化反应;高分散;二氧化硅;补强剂
中图分类号:
Synthesis of silica reinforcing agent for tire rubber by a
pressurized carbonation approach
Zhuang Yiwei, Hu Xiaohui, Zhubao, Hong Yanzhen, Su Yuzhong, Wang Hongtao, Li
Jun
(Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical
Engineering, Xiamen University)
Abstract: In this work, a pressured carbonation reaction with existing of surfactant was proposed to
prepare highly dispersible silica from sodium silicate solution. The influence of pressure, reaction time,
reaction temperature and concentration of sodium silicate on the surface area and DBP absorption of
the produced silica was investigated. Results showed that the silica powder preapred at MPa,
75 ℃ for 1mol/L sodium silicate solution in 2 h had appropriate surface area and pore structure. After
disaggregating under ultrasound, more than 80 % of the aggregation can be broken into nano-size
particles. The