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加压碳化反应制备胎面SiO2补强剂

发表时间:2014-04-15  浏览量:1694  下载量:532
全部作者: 庄艺伟,胡晓慧,祝宝,洪燕珍,苏玉忠,王洪涛,李军
作者单位: 厦门大学化学化工学院
摘 要: 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SiO2. 研究反应压力、反应时间、硅酸钠浓度及反应温度等对SiO2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(0.05 MPa)和75℃下反应约2 h可以得到比表面积和聚集体结构合适的SiO2产品。采用粒径分布法测定实验样品的分散性能,结果表明:通过超声破碎解聚后真空干燥样品中有80%以上的聚集体可以解聚成纳米颗粒,而采用超临界干燥的产品则可以100%解聚为纳米颗粒。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SiO2在轮胎胎面胶中有较好的补强性能,尤其是添加超临界干燥SiO2补强后的橡胶样品,其抗撕裂和延伸率分别为普通白炭黑补强橡胶的1.6倍和2.4倍。
关 键 词: 硅酸盐工程技术;高分散;碳化反应;SiO2;补强剂
Title: Synthesis of SiO2 reinforcing agent for tire rubber by a pressurized carbonation approach
Author: ZHUANG Yiwei, HU Xiaohui, ZHU Bao, HONG Yanzhen, SU Yuzhong, WANG Hongtao, LI Jun
Organization: College of Chemistry and Chemical Engineering, Xiamen University
Abstract: In this paper, 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 dibutyl phthalate (DBP) absorption of the produced silica was investigated. The results showed that the silica powder prepared at 0.05 MPa, 75℃ for 1 mol/L sodium silicate solution in 2 h had appropriate surface area and pore structure. After disaggregating under ultrasound, more than 80% of the aggregation in vavumn dried silica product could be broken into nano-size particles and it increased to 100% while adopting the supercritical drying method. The sample was applied to the tire rubber, better reinforcing ability was found for the prepared product compared with ordinary silica, especially for the rubber reinforced by supercritical dried silica, the tear force and elongation were respectively 1.6 times and 2.4 times as large as that of commercial silica.
Key words: silicate engineering technology; high dispersion; carbonation; SiO2; reinforcing agent
发表期数: 2014年4月第7期
引用格式: 庄艺伟,胡晓慧,祝宝,等. 加压碳化反应制备胎面SiO2补强剂[J]. 中国科技论文在线精品论文,2014,7(7):707-714.
 
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