**5.3. PU as composites**

CFATU composites were developed by the introduction of MMT clay [48] and nano sized ZnO by Zafar et al [unpublished work]. Morphology of the composites as studied by TEM revealed the presence of nanosized globules of size ranging between 15‐120 nm in CFATU/OMMT (Figure 11), and ZnO in CFATU/ZnO composites occurring as nano‐sized spindles of diameter 50‐60nm (Figure 12). Both the composite materials may find application as corrosion protective coatings for mild steel. CFATU/ZnO composites also act as excellent antifungal agents against common fungal strains such as *Candida albicans*, *Candida krusei*, *Candida glabrata* and *Candida tropicalis*.

**Figure 11.** TEM of CFATU/OMMT

**Figure 12.** TEM of CFATU/ZnO composite
