聚合物接枝改性炭黑粒子的表面性质

STUDY ON SURFACE PROPERTIES OF CARBON BLACK PARTICLES MODIFIED WITH SURFACE GRAFTING POLYMER

研究了由聚合物表面接枝改性炭黑和ＫＣｌ水溶液组成的分散体系中，炭黑粒子表面Ｚｅｔａ电位的变化．探讨了阴离子表面活性剂十二烷基苯磺酸钠（ＬＡＳ）和阳离子表面活性剂十二烷基苄基二甲基氯化铵（１２２７）在普通炭黑和聚合物接枝改性炭黑表面的吸附行为结果表明：聚丙烯酸接枝改性炭黑粒子的表面Ｚｅｔａ电位远低于未接枝改性的；但用聚丙烯酰胺接枝改性炭黑粒子的表面Ｚｅｔａ电位无明显变化．与普通炭黑比较，表面活性剂在改性炭黑表面的平衡吸附值有较大变化，从而使该类粒子的表面Ｚｅｔａ电位值发生变化．

The surface Zeta electric potential of carbon black Particles modified with surface grafting polymer-KCl aqueous solution system was investigated.Adsorbability of sodium laurylbenzene sulfonate (LAS)or N-lauryl benzyldimethyl chloride(1227)molecules on normal carbon black surface and graft polymer modified carbon black surface was explored.It was suggested that the Zeta electric potential Ez of carbon black particles modified with surface graft polyacrylamide is lower than that of unmodified carbon black,but modification of surface grafting of acrylamide onto carbon black do not change Ez of modified carbon black particles.Becaise of surface modification of graft polymer,the adsorbtion balance of surfactant on carbon black surface and Ez are changed.