${}^{1}$H HR-MAS NMR reveals the degradation mechanisms of ancient documents.

Vasi S., Mallamace D., Missori M., Corsaro C.
  Lunedì 11/09   14:30 - 18:30   Aula A222   VI - Fisica applicata, acceleratori e beni culturali
${}^{1}H$ HR-MAS NMR spectroscopy is used with the aim to understand the microscopic mechanisms underlying the degradation pathways of paper. This technique identifies the byproducts of oxidative and hydrolytic reactions going on within the considered samples. Furthermore, the study of the dynamics of water and cellulose as a function of both hydration and aging points out the role of water in driving these mechanisms. We study both ancient samples and modern paper samples (not aged and artificially aged) as reference. Our results evidence in all samples the presence of carboxylic acids with varying degradation history and dynamics.