摘要
采用O/W乳液溶剂挥发法,以不同的物质作为微球制备过程中的表面稳定剂,制备了聚乳酸包覆磷酸钙粉末状复合材料。讨论了搅拌速度、搅拌时间等因素对微球的影响,并对分散过程中的热力学进行了分析。实验结果表明最佳制备条件:搅拌速度800r/min,搅拌时间3h,油水相体积比1:100,聚乳酸质量浓度30g/L,乳化剂为Tween20。
The powdered composite materials of β-TCP coated with polylactic acid are prepared by using different materials as the surface stabilizers in the preparation of microsphere via O/W emulsion solvent evaporation. The influence of stirring rate and stirring time on the microsphere is discussed. The thermodynamics in the dispersion process is analysed.The experimental results show that the best technical conditions are the stirring rate of medium speed（800r/min）,stirring time of 3 h,volume ratio of oil to water of 1 ： 100, polylactic acid mass concentration of 30 g/L and emulsifying agent Tween 20.
出处
《化学推进剂与高分子材料》
CAS
2005年第6期42-44,共3页
Chemical Propellants & Polymeric Materials
关键词
聚乳酸
磷酸钙
溶剂挥发法
微球
polylactic acid
tricalcium phosphate
solvent evaporation
microsphere
