Effects of drying time on the surface morphology evolution of urushiol-formaldehyde diethylenetriamine polymer microporous films

Raw lacquer, a renewable and eco-friendly biopolymer material with excellent physico-mechanical properties, has been principally used to coat objects of high artistic and pleasing beauty for centuries. In previous reports, we studied microporous urushiol-based polymer (UBP) films by the water-assisted assembly method. The effect of drying time on the formation of breath figures with honeycomb patterns in the microporous films of urushiol-formaldehyde diethylenetriamine polymer (UFDP) was investigated in this paper. The pattern structure was studied with optical microscopy (OM) and scanning electron microscopy (SEM). The drying time, which is influenced by the reflux time, plays a decisive role in the morphology, such as pore size and distribution periodicity, of the microporous UFDP films.

No pores films formed when the TF drying time of UFDP was 90 min; whereas ordered patterns were observed in the films, when the TF drying time of UFDP was decreased to 2.5 min.Highlights► Honeycomb-patterned UFDP films were prepared by breath figures approach. ► The drying time plays decisive role in the microporous UFDP films morphology. ► The shorter the drying time was, the more ordered porous films were obtained.