摘要
以氢氧化钙和磷酸二氢钙为前驱,用均相化学沉淀法合成制备了羟基磷灰石(HAP)。研究了pH值、定势离子(Ca2+,PO43-)浓度及改性剂对HAP水悬浮液的Zeta电位和分散稳定性的影响,探讨了荷电性与分散稳定性的关系。结果表明:Zeta电位的绝对值越大,HAP水悬浮液的稳定性越强。并采用两种具有典型代表性的物质,壳聚糖和明胶对HAP微粒进行改性,得到了稳定的HAP水悬浮液。
Using calcium hydroxide [Ca（OH）2 ] and calcium dihydrogen phosphate [-Ca（H2 PO4）2 ] as precursors, the hydroxyapatite（HAP） was synthesized by homogeneous chemical sedimentation reaction. The effects of pH value, determinative ions concentration （Ca^2＋, PO4^3-） and modifiers on the Zeta potential and dispersion stability of aqueous hydroxyapatite suspension were studied, and their relationship was discussed. Results indicated the more absolute value of Zeta potential, the more stability of HAP suspension. The stable HAP suspension was gained by two typical representative modifiers as chitosan and gelatin.
出处
《化工新型材料》
CAS
CSCD
北大核心
2007年第12期32-34,共3页
New Chemical Materials
基金
陕西省教育厅专项科研计划项目(06JK338)
