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Güncem Özgün Eren

Güncem Özgün Eren

Yıldız Technical University Turkey

Title: CONSERVATION OF HISTORICAL DOCUMENTS WITH SILVER/CHITOSAN NANOCOMPOSITE

Biography

Biography: Güncem Özgün Eren

Abstract

‘History is teacher of life’ as Romans expressed. It is a very significant matter of fact which contains the past, the present and the future of the societies, also has a very important place in improving the social consciousness. One of the most important duty of the mankind is to protect such a worthy history heritage. Archives that made by paper are one of the main parts of our past.

Paper can be deteriorated due to physical, chemical and biological based factors such as acidity, metal ions, lightning, heat, humidity, UV light, pollutants or biodeteriogens. Among these factors, for one, microorganisms can damage on papers irrevocably via releasing some reactive groups.

In this study focused on conservation of historical paper samples by using silver-chitosan Nano composite coating to gain antibacterial and antifungal feature. It is well known that Ag nanoparticles possess antibacterial properties. Chitosan, a polysaccharide biopolymer derived from naturally occurring chitin, displays unique polycationic, chelating and film forming properties due to the presence of active amine and hydroxyl functional groups, is a natural polymer that is both non-toxic and biodegradable. Silver-chitosan Nano composite produced at specific temperature via solvothermal method. Then produced samples are characterized via Scanning Electron Microscopy (SEM). Coating of sample papers are carried out by using three different methods that called dipping, spraying and electrospinning. Afterwards micro-organism growth tested in Süleymaniye Manuscript Library.