Restoration of culturally significant wooden artifacts using gamma radiation curable polyester resins

Abstract

The preservation of cultural artifacts, particularly those made of wood, is a significant concern for conservators due to their susceptibility to damage from xylophagous organisms, fungi, and bacteria. This study investigates the use of gamma radiation to cure polymeric resins for the consolidation of three wood species: cedar (Cedrela spp.), canafistula (Peltophorum dubium), and ivorywood (Balfourodendron riedelianum). Various resins, including polyester LP 8847® combined with styrene, were subjected to gamma radiation to induce cross-linking without the need for catalysts. The results demonstrated that gamma radiation effectively cured the resin, filling wood pores and enhancing structural integrity. The analysis of apparent density showed that cedar, canafistula, and ivorywood exhibit different absorption capacities, with cedar absorbing the most resin and canafistula the least. Optical and Scanning Electron Microscopy confirmed the efficient penetration of resin into the wood samples, indicating that gamma radiation can be a viable technique for wood consolidation and protection against degrading agents.