加压碳化反应制备胎面二氧化硅补强剂
Synthesis of silica reinforcing agent for tire rubber by a pressurized carbonation approach
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75oC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76.8 kgf/cm2，延伸率可达到800%以上。
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 0.05 MPa, 75 oC 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 sample was applied to the tire rubber, better reinforcing ability was found for the as-prepared product compared with ordinary silica, for example, especially the tear force reached 76.8 kgf/cm2 and elongation was above 800%.
洪燕珍、苏玉忠、王宏涛、胡晓慧、庄艺伟、祝宝、李军
非金属元素化学工业、非金属无机化合物化学工业硅酸盐工业橡胶工业
化学工程碳化反应高分散二氧化硅补强剂
hemical engieeringcarbonationhigh dispersionsilicareinforcing agent
洪燕珍,苏玉忠,王宏涛,胡晓慧,庄艺伟,祝宝,李军.加压碳化反应制备胎面二氧化硅补强剂[EB/OL].(2013-11-01)[2025-08-16].http://www.paper.edu.cn/releasepaper/content/201311-19.点此复制
评论