超细黑索今在水中的分散性研究

DISPERSION OF ULTRAFINE RDX IN WATER

选用多种表面活性剂对超细黑索今（ＵＦＲＤＸ，粒径０．１～１０μｍ）粒子进行表面改性，应用浊度法对改性及未改性的ＵＦＲＤＸ粒子在水中的分散性进行了研究，发现非离子表面活性剂烷基苯基聚氧乙烯醚（ＯＰ）及复合表面活性剂能起到很好的改性作用，其中ＯＰ与十二烷基苯磺酸钠（ＳＤＢＳ）复合后能明显改善ＵＦＲＤＸ粒子在水中的分散性。通过测定改性前后粒子的ζ电势，探讨了表面活性剂分子在ＵＦＲＤＸ粒子表面上的吸附机理和ＵＦＲＤＸ粒子在水中的稳定机理。

The dispersion of ultrafine pulverized RDX (UFRDX) particles in water was studied by measuring the turbidity of the suspension colloids which had been precipitated for a certain time. The surface of some UFRDX particles was modified by adding several surfactants including ionic,nonionic,zwitterionic and composite surfactants. It is found from the results that nonionic surfactant OP and composite surfactants show a good modification effect,especially OP sodium dodecyl benzene sulfonate can greatly improve the dispersion of UFRDX particles in water. The adsorption mechanism of surfactants on the particles and the stabilization mechanism of the particles in water were also studied by measuring the ζ potential of UFRDX particles.