Rheoreversible hydrogels in paper restoration processes: a versatile tool

Chemistry Central Journal

Claudia Mazzuca¹  Laura Micheli¹  Federico Marini²  Marta Bevilacqua²  Gianfranco Bocchinfuso¹  Giuseppe Palleschi¹  Antonio Palleschi¹ 

[1] Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma “Tor Vergata”, Via della Ricerca Scientifica snc, Rome 00133, Italy

[2] Dipartimento di Chimica, Università di Roma “Sapienza”, P.le Aldo Moro 2, Rome 00185, Italy

关键词: PCA analysis;    HPLC;    FTIR;    Paper artworks;    Cleaning treatment;    Rheoreversible hydrogel;   

Others  :  787801
DOI  :  10.1186/1752-153X-8-10

 received in 2013-03-05, accepted in 2014-02-01,  发布年份 2014

【 摘 要 】

Background

Paper based artworks are probably ones of the most difficult materials to restore, because of their complexity and fragile structure. Cleaning of paper artifacts, one of the process commonly carried out during restoration, usually involves the use of solvents (organic or not), that may cause several troubles, like swelling and dissolution of some components, and may also be harmful to the users.

Results

Innovative procedure for cleaning paper artworks is reported in this paper. It is based on the use of rheoreversible, biocompatible hydrogels containing poly(ethylene oxide) or poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) and α-cyclodextrin. We have studied two types of polymer with different hydrophobic properties in order to obtain two different hydrogels with slightly different cleaning capabilities. Our overall strategy has been to develop innovative systems based on these hydrogels so as to better confront the problems that a restorer faces during the cleaning of paper samples. Rheoreversible hydrogels are intriguing materials because their application and removal is not invasive and does not require a liquid treatment that could induce damage to the paper.

Conclusions

These hydrogels have been applied in the cleaning of both new and aged paper samples and their cleaning efficiency has been established. Moreover, by comparison with traditional methods, the greater efficacy of the proposed procedure has been demonstrated.

To assess the cleaning efficacy of these hydrogels, a multidisciplinary approach, combining non-invasive spectroscopic infrared techniques together with scanning electron microscopy, chromatographic (HPLC) analysis and pH investigations has been used. Near infrared spectroscopy spectra were coupled with a chemometric analysis to achieve a better interpretation of data.

This work constitutes a preliminary step towards focused study in the development of α-cyclodextrin/polymer hydrogel family which will allow cleaning of paper artifacts with peculiar characteristics.

【 授权许可】

   
2014 Mazzuca et al.; licensee Chemistry Central Ltd.

【 图 表 】

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