Improving UV-stability of epoxy coating using encapsulated halloysite nanotubes with organic UV-stabilizers and lignin

Epoxy coatings are used in a wide variety of applications due to their excellent chemical, thermal, and mechanical properties. However, susceptibility UV degradation has limited use exterior applications. Usually, organic absorbers stabilizers added epoxy systems improve stability, but performance decreases over time the loss UV-stabilizers. In this study, novel method was developed encapsulate lignin (as natural absorber) into halloysite nanotubes (HNTs). To ensure successful encapsulation, pristine filled were characterized quantitatively, using thermogravimetric analyzer (TGA), qualitatively with X-ray photoelectron spectroscopy (XPS). Then, encapsulated (HNTs) an system (1−3 wt%) efficacy evaluated before after 840 h accelerated weathering. Changes physical, thermal properties measured spectrophotometer, field emission scanning electron microscopy (FE-SEM), paramagnetic resonance (EPR), Fourier transform infrared (FTIR), differential calorimetry (DSC). The results showed that samples containing 2 wt% HNT-encapsulated UV-stabilizers, 1 HNTs had significantly higher stability than resin prepared same concentration these individual components (UV-stabilizers or lignin). This study demonstrates HNTs, lignin, improving extending service life coatings. Nanoclay (HNT) loaded polymer, can be as effective UV-absorber increase weathering resins.