Cellular structured resorcinol/formaldehyde (R/F) microspheres were synthesized via the sol-emulsion-gel reaction and followed by supercritical drying with CO2. The materials were characterized by thermogravimetry, FT-IR spectroscopy, nitrogen physisorption technique and scanning electron microscopy. Variation of ageing conditions leaded to different micro and macro-structure, which affected bulk density, pore size distribution, specific surface area, and morphology of cellular structured R/F microspheres. The resultant R/F microspheres have average pore sizes in the range of less than 100 nm. Increasing the ageing time leaded to decreased surface area of cellular structured R/F microspheres. As the ageing temperature increased, the bulk density increased and the surface area decreased. The pore morphology depended on the ageing temperature and it was evidenced by nitrogen physisorption experiments.
All Science Journal Classification (ASJC) codes
- Polymers and Plastics
- Organic Chemistry