纳米二氧化钛脱酸的实验研究

Experimental study on de-acid behavior about nano-titania solution

本文对纳米TiO2分散体系进行了加热、加碱和加分散剂后再加碱脱酸,从试验结果可知,加热脱酸是比较经济实用的,但是脱酸的效率不是很高;加碱脱酸很快就能达到中性,但是加碱后纳米TiO2的分散性及其稳定性变差;试验还发现先加入一定量的分散剂再加碱,既能达到脱酸的目的又能不影响其分散效果。故先加入分散剂再加碱是一种比较理想的方法。

In the paper experiments on acid removal behavior about nano-titania solution were carried out. Several kinds of de-acid methods were carried out： heating, adding some alkali and adding some dispersam first and then adding some alkali. From experiment results, it is known that heating is an economical and practical method for de-acid, but the efficiency is low;It is easy for the pH value of the nano-titania solution close to 7 by adding somealkali, but the dispersive property and stability of nano-titania powders become worse. It is found that the method that adding dispersant first and then adding some alkali is very good. It can realize de-acid while does not influence the dispersive property and stability of nano-titania powders, and is a relatively ideal method.