期刊
JOURNAL OF APPLIED POLYMER SCIENCE
卷 139, 期 17, 页码 -出版社
WILEY
DOI: 10.1002/app.52011
关键词
applications; biopolymers; cellulose; other wood products; renewable polymers
资金
- Ente Cassa di Risparmio di Firenze
- Horizon 2020 Framework Programme [NMP21-2014/646063]
- Regione Toscana [PAR FAS 2007 -2013]
The acid-catalyzed hydrolysis of glycosidic bonds is the primary degradation mechanism affecting cellulose-based materials, which can be reduced through neutralization of acidity. In addition to deacidification, a consolidation treatment is necessary for severely degraded artifacts. The use of saccharide derivatives as monomers improves the affinity and compatibility of the biopolymer with the artifacts to be treated.
Acid-catalyzed hydrolysis of glycosidic bonds is the most important degradation mechanism affecting cellulose-based materials. It results in the decrease of DP and in the loss of the original mechanical properties. The neutralization of acidity is therefore one of the most efficient ways to hamper the degradation of cellulosic artworks. However, in the case of acidic and strongly degraded artifacts, in addition to deacidification, a consolidation treatment must be performed. To this aim, a new class of biopolymers, obtained by a synthetic procedure that considers the principles of Sustainable Chemistry, was investigated. Three allyl saccharide/vinyl acetate copolymers, having different molar ratios between starting monomers, were prepared using alpha,alpha'-trehalose, and used to synthesize the corresponding allyl saccharide/vinyl alcohol copolymers. The use of saccharide derivatives as monomers improves the affinity and compatibility of the biopolymer with the artifacts to be treated. After characterization, the efficacy of the copolymers in the strengthening of degraded paper was evaluated with mechanical tests. The most effective system was thus selected for further testing. Its performance was compared to that of Klucel G (R), a commercial product belonging to the class of cellulose derivatives, which are largely used in conservation practice.
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