粉煤灰表面改性的研究

本文利用H-NA,H-R等六种不同的表面活化剂,采用干法和湿法的活化工艺,对粉煤灰的表面进行改性研究。试验表明,活化粉煤灰表面的羟基数目减少,增加了活化剂的相应基团,它在有机介质中的分散性明显好转。用活化粉煤灰作聚氯乙烯和橡胶的填料,制成试样,测试结果表明,与未活化的粉煤灰相比,各种性能均明显改善,除橡胶磨耗减量质量有待进一步提高外,其余各项指标均达到和超过有关标准。因此,这是利用再生资源,降低复合材料成本,保护环境的一种新途径。

A Study on Modifieation of the Surface of Coal Ash

The modification of the surface of coal ash was achieved by treating the ash with six kinds of surfactants including HNA, H-R through dry or wet processes of activation. Experiment results indicate that the number of hydroxyl group on the ash surface decreased while corresponding groups of activator increased resulting in the improvement of its property of dispersion in organic medium. The properties of processed PVC and rubber samples with the activated coal ash as filler were greatly improved compared with those products with untreated ash as filler. All the technical targets of the new products, except for the decrease of abrasive wear of rubber, which needs to be further improved, reached or surpass the relevant standards. No doubt, thtis is a new path for making use of the regenerated resource with the advantages of lowering the cost of composite material and protecting the environment.