ANTIMICROBIAL PROPERTIES OF COATINGS BASED ON CHITOSAN DERIVATIVES FOR APPLICATIONS IN SUSTAINABLE PAPER CONSERVATION

作者：Bobu Elena^*; Nicu Raluca; Obrocea Paul; Ardelean Elena; Dunca Simona; Balaes Tiberius

来源：Cellulose Chemistry and Technology, 2016, 50(5-6): 689-699.

• paper conservation
• chitosan derivatives
• coating formulas
• antimicrobial activity

This paper analyses the potential of coatings based on chitosan derivatives (ChDs) to provide antimicrobial protection on paper surface, and also to substitute cellulose ethers used as consolidation/resizing materials in paper heritage conservation. The chitosan derivatives (alkyl chitosan - ACh, quaternary chitosan - QCh and carboxymethyl chitosan CCh) were applied as one or multilayer coatings of a single or a combination of two derivatives, using different support paper types. The assessment of the antimicrobial activity of coated paper samples has shown different effectiveness among the ChDs: QCh and CCh inhibited Gram-positive and Gram-negative bacteria and had moderate effectiveness on fungi, while ACh completely inhibited fungal growth, but was less effective on Gram-positive bacteria. Finally, it was concluded that optimal combinations of two ChDs in coating formulas could confer antimicrobial protection on paper surface against a broad spectrum of pathogenic microorganisms.

• 出版日期2016-7