A customised atmospheric pressure plasma jet for conservation requirements

Florence Heri-Tech - The Future of Heritage Science and Technologies

Patelli, A.^1 ; Verga, E.^2 ; Nodari, L.^3 ; Petrillo, S.M.^4 ; Delva, A.^2 ; Ugo, P.^2 ; Scopece, P.^5

Dipartimento di Fisica e Astronomia, Universita di Padova, via Marzolo 8, Padova

35131, Italy^1

Universita di Venezia, via Torino 155, Venezia

30172, Italy^2

ICMATE-CNR, Corso Stati Uniti 4, Padova

35127, Italy^3

SMP International Photo Conservation Studio, Rome, Italy^4

Nadir Srl, via Torino 155, Venezia

30172, Italy^5

关键词: Atmospheric plasmas;    Atmospheric pressure plasma jets;    Biological cleaning;    Coating removal;    Cultural heritages;    Electrode material;    Mechanical shock;    Surface chemicals;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/364/1/012079/pdf
DOI  :  10.1088/1757-899X/364/1/012079

来源: IOP

【 摘 要 】

In the last years atmospheric plasma has gained an increasing interest in the field of Cultural Heritage. Isolated experimentations that yet generated interesting results have drawn the attention of a wider community working on coating removal, oxide reduction and sterilization applications. Thanks to this growing multidisciplinary interest, the EU funded in 2011 the PANNA project, which includes the atmospheric plasma as a novel cleaning tool for cultural heritage. Plasma cleaning has some advantages compared to standard techniques because it avoids the use of solvents, it is contactless and differently from laser it works through a surface chemical action and not with mechanical shock or local heating. Moreover, atmospheric plasma has already shown good results in reducing mode for the conversion of corroded metal surface layers and in oxidation mode for biological cleaning and organic layer removal. In order to fulfil the Cultural Heritage requirements a novel plasma torch has been developed with a new design which allows to overcome the actual limits of commercial atmospheric plasma devices. The new device permits fast and effective treatments at temperatures lower than 50 °C, even at room temperature, without any electrode material deposition. These performances will be presented in relation to the removal of epoxy coatings and daguerreotype cleaning as examples.