化工进展Issue(6)：1545-1550,6.DOI:10.3969/j.issn.1000-6613.2014.06.031
牙膏磨擦剂二氧化硅制备条件的优化
Preparation of silica for toothpaste as abrasive
苏二强 1高春苹 1董晋湘1
作者信息
- 1. 太原理工大学精细化工研究所，山西 太原 030024
- 折叠
摘要
Abstract
Using sodium silicate and sulphuric acid as raw materials,the silica suitable for using in transparent toothpaste has been synthesized by precipitation process. Effects of the reaction conditions on the properties of silica have been investigated,such as the concentration of sodium silicate in the reactor,reaction temperature and aging time. It was found that optimal reaction condition was determined as sodium silicate in the reactor 0.13mol/L,65 degree C and ageing time 30 min. Under the condition,the light transmittance of silica was 89%. On this basis,it was focused on the influence of the concentration of Na2SO4 and NaCl adding in reaction liquid to improve light transmittance. It turned out that the light transmittance of silica synthesized at 65 degree C has negligible influence on the concentration of Na2SO4 or NaCl adding in the reaction liquid 0.04~0.12mol/L. But at 85 degree C,the light transmittance of silica synthesized under Na2SO4 0.08mol/L was 97% and the light transmittance of silica synthesized under NaCl 0.12mol/L was 96%. The possible reason for this phenomenon could be that the electrolytes participate in the polymerization of silicic acid more effectively at a relatively high temperature,improving the transmittance of SiO2. The properties of the synthesized substance have met the standard of QB/T 2346-2007.关键词
牙膏磨擦剂/二氧化硅/合成/电解质Key words
toothpaste abrasive/silica/electrolytes/synthesis分类
化学化工引用本文复制引用
苏二强,高春苹,董晋湘..牙膏磨擦剂二氧化硅制备条件的优化[J].化工进展,2014,(6):1545-1550,6.
