论文部分内容阅读
研究了聚丙烯酸铵 (NH4 PAA)对纳米SiO2 粉体表面电动特性及其悬浮液稳定性的影响。结果表明 ,NH4 PAA在SiO2 表面吸附 ,提高了颗粒间的排斥势能 ,改善了悬浮液的稳定性。在 pH为 8、NH4 PAA的加入量为 0 9%时 ,纳米SiO2 颗粒表面吸附达到饱和。Abstract Theeffectsofammoniumsaltofpolyacrylicacid(NH4 PAA)onthesurfacepropertiesofnanosizedsilicaandstabilityofnanosizedsili casuspensionhavebeeninvestigated .Theresultsshowthatchemicalabsorptiononthesurfaceofnanosizedsilicawouldincreasetherepulsiveenergyofparticlesandthusimprovedthestabilityofsuspension .ThesurfaceofnanosizedsilicapowdermaybeattainedwithsaturatedabsorptionwhenpHvalueis 8andNH4 PAAadditionis 0 .9% .