RESUMEN
In this study, a UV-curable acrylate epoxy nanocomposite coating has been prepared by incorporation of ZnO-Ag hybrid nanoparticles. For this purpose, firstly ZnO-Ag hybrid nanoparticles were fabricated by a seed-mediated growth method. Then, these ZnO-Ag hybrid nanoparticles (2 wt%) were added into the UV-curable acrylate resin matrices. The photocuring process of nanocomposite was evaluated by various factors, such as the conversion of acrylate double bonds, pendulum hardness and gel fraction. Under the 4.8 s UV-exposure time for full crosslinking, the obtained data indicated that incorporation of ZnO-Ag nanohybrids into the coating matrix changed the crosslinking process of coating significantly. A mechanical teat indicated that the presence of nanohybrids in photocurable coating matrix enhanced its abrasion resistance from 98.7 to 131.6 L per mil (33.3%). The antibacterial test against E. coli over 7 h indicated that E. coli bacteria were killed totally by nanocomposite coating, whereas it was 2.6 × 104 CFU mL-1 for the neat coating without nanoparticles.
RESUMEN
In the title compound, C7H8N4S2, the thio-phene ring shows rotational disorder over two orientations in a 0.6957â (15):0.3043â (15) ratio. The plane of the 1,2,4-triazole ring makes a dihedral angle of 75.02â (17)° with the major-disorder component of the thiophene ring. In the crystal, two types of inversion dimers, described by the graph-set motifs R22(8) and R22(10), are formed by N-Hâ¯S inter-actions. Chains of mol-ecules running in the [101] direction are linked by weaker N-Hâ¯N inter-actions. The thio-phene ring is involved in π-π and C-Hâ¯π inter-actions.