摘要
利用自制的SPG(Sh irasu-porous-g lass)膜乳化实验装置研究了制备具有微米级粒径的单分散乳化液体系新方法。对于给定微孔膜孔径条件下,连续相流速和乳化压强成为膜分散过程主要控制因素,对所制备乳液粒径单分散性质起决定作用。对于给定的乳化压强,连续相流速增大,制得的乳液液滴尺寸减小,乳液单分散性增强;保持较高的连续相流速,在临界乳化压强以下,逐渐增大乳化压强使得乳液液滴尺寸增大,乳液单分散性几乎不受影响,超过临界乳化压强后,乳液液滴尺寸急剧增大,乳液单分散性变差。根据上述规律确定合适的工艺条件,使用孔径为0.9μm的SPG膜进行煤油/水体系的膜乳化实验,合成平均粒径3.24μm,分散度为0.56的O/W型稳定乳液。
Monodisperse emulsions were prepared using an in-home Shirasu-porous-glass （SPG） membrane emulsification system. Both the flow velocity of the continuous phase and the emulsification pressure influence the raonodisperse properties of each SPG membrane which has a uniform micropore distributions. Increasing flow velocity in the continuous phase improves the emulsion rnonodispersity and reduces the average size of the emulsions for a constant emulsification pressure. For pressure below a critical pressure, increasing emulsification pressures leds to increases in the average emulsion size, with the emulsion monodispersity almost unchanged for relatively high flow velocities in the continuous phase. Above the critical pressure, the monodispersity became worse. Using an SPG membrane with a 0. 9 μm pore size, kerosene was dispersed into water to form a steady emulsion with average drop size of 3.24 μm and a monodispersity factor of 0.56.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2006年第3期389-391,395,共4页
Journal of Tsinghua University(Science and Technology)
基金
国家自然科学基金资助项目(20276033
20276014)
国家"九七三"重点基础研究项目(2003CB615701)
关键词
膜乳化
单分散
O/W型乳液
membrane emulsification
monodisperse
O/W type emulsion
