| 内容提要: |
本次报告是天津大学博士生论坛化工分论坛报告。
A visualized technology was developed for studying film formation by interfacial polymerization (IP). The visualization used an optical contact angle measuring device (OCA) to visualize the film surface morphology. The effects of various synthesis conditions (such as organic solvent, reaction time, reactants concentration, etc.) on film morphology were further studied. Particle image velocimetry (PIV) was employed to investigate the flow field in the vicinity of the aqueous-organic interface. The results show that the convexities on the film surface were attributed to interfacial instability arising from the presence of very steep concentration gradient near the aqueous-organic interface. These convexities ultimately gave rise to the rough film surface. This paper also indicates that OCA and PIV are very useful tools for in situ studying the fundamentals of IP film formation process. |