摘要
用红外光谱和拉曼光谱分析沉淀法白炭黑和气相法白炭黑的微观结构。结果表明:与气相法白炭黑相比,沉淀法白炭黑表面羟基含量相对较高;未经热处理的沉淀法白炭黑表面覆盖结合水分子,随着处理温度的升高,沉淀法白炭黑表面先失去羟基结合水分子,然后发生羟基缩合反应,直至最后失去所有羟基,形成Si—O—Si网络结构;气相法白炭黑未经热处理时即可明显观察到羟基的存在,且处理温度对其结构影响不明显,这可能是沉淀法白炭黑与气相法白炭黑生产工艺不同造成的。
The microstructures of the precipitated silica and fumed silica were analyzed by infrared spectrum and Raman spectrum.The results showed that,compared with the fumed silica,the surface hydroxyl content of the precipitated silica was higher,the surface of the precipitated silica without heat treatment was covered by bound water molecules,and with the increase of treatment temperature,the water molecules bound to the hydroxyl groups on the surface of the precipitated silica were removed,and then the hydroxyl group condensation reaction occurred,until finally all the hydroxyl groups were lost,and a Si—O—Si network structure was formed.On the other hand,the existence of the hydroxyl groups could be clearly observed on the surface of the fumed silica without heat treatment,and the treatment temperature had no obvious effect on the structure of the fumed silica.This might be attributed to the different manufacturing process of the precipitated silica and fumed silica.
作者
曹翠玲
姜华波
CAO Cuiling;JIANG Huabo(Qingdao Superlative Innovative Technology Co.,Ltd,Qingdao 266043,China])
出处
《橡胶工业》
CAS
2022年第8期623-628,共6页
China Rubber Industry
