Assessing the Condition of Complex Poly-Material Artworks by Py-GC-MS: The Study of Cellulose Acetate-Based Animation Cels

Separations

article

Francesca Caterina Izzo¹  Henk Van Keulen²  Alessandra Carrieri³ 

[1] Department of Environmental Sciences, Informatics and Statistics, Ca’ Foscari University of Venice;Cultural Heritage Agency of the Netherlands;Italian Ministry of Culture, Conservator officer of Centro di Restauro

关键词: pyrolysis;    GC-MS;    cellulose acetate;    animation cels;    Rodovetri;    alkyd paints;    ESCAPE;   

DOI  :  10.3390/separations9050131

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

The material composition of a group of Rodovetri, hand-painted animation cels, made in the 1950s and 1960s for Italian television, has been determined by Flash Py-GC-MS, Thermally assisted Hydrolysis and Methylation-(Py-)GC-MS and GC-MS investigations, where, for the pyrolysis applications, the pyrolyzer is connected septum-less to the GC inlet. The condition of the selected animation cels was generally poor (yellowing, exudation, warping, cracking). The cels are made of plasticized cellulose acetate (CA) and decorated with alkyd paint. Exudating plasticizers from the CA support migrated into the paint; this has softened the paint layers and made the cels stick together. CA is known to be very unstable and easily subjected to degradation, which cannot be reversed, only slowed down by preventive conservation. Most of the cels are plasticized with bis(2-methoxyethyl) phthalate (DMEP) and triphenyl phosphate (TPP). The research shows a relationship between the degradation of CA and the presence of TPP and DMEP.

【 授权许可】

CC BY