Epoxy coatings are usually reinforced by the use of nanofillers, but reactive nanofillers having physical tendency towards epoxide ring opening are preferable. In this work, nanosilica (SiO2) and halloysite nanotubes (HNTs) known for their hydroxyl-contained surface are used and their effects on the curing behavior of an epoxy/amine coating is compared. The spherical and tubular nano...

Heat generation in an exothermic reaction during the curing process and low thermal conductivity of the epoxy resin produces high peak temperature and temperature gradients which result in internal and residual stresses, especially in large epoxy samples. In this paper, an optimization algorithm was developed and applied to predict the thermal cure cycle to minimize the temperature peak and the...

Objectives: To measure and compare the bond strength between three different types of ceramics resin cement, as well degree conversion cement after using light-curing units curing modes. Methods: Three ceramics—Leucite-reinforced (Empress CAD), Lithium disilicate (Emax Zirconia ZirCAD)—of varying thicknesses (1.5 mm 2.0 mm) were bonded to a light-cure (Variolink Esthetic LC). Light-curing was c...

The effectiveness of curing oranges and lemons at 33 degrees C for 65h followed by storage under ambient and cold-storage conditions was investigated. This treatment effectively reduced the incidence of Penicillium digitatum (Pers) Sacc and P italicum Wehmer decay on inoculated and naturally infected oranges and lemons stored at 20 degrees C for 7 days. However, it failed to control green and b...

BACKGROUND Surface sealants have been successfully used in the prevention of erosive tooth wear. However, when multiple tooth surfaces should be sealed, the light-curing procedure is very time-consuming. Therefore, the aim of this study was to investigate whether reduced light-curing time (while maintaining similar energy density) has an influence on resin-based surface sealant cytotoxicity. ...

The debate regarding composite resin’s shorter than expected service life is ongoing. properties of this restorative material seem to only have a minor effect on restoration longevity, and the major reasons for failure can be attributed patient skills operator. Inadequate light curing (photopolymerisation) resin also an important contributing factor in less optimal outcomes involving posterior ...