ANTIFUNGAL PROTECTION AND SIZING OF PAPER WITH CHITOSAN SALTS AND CELLULOSE ETHERS. PART 2, ANTIFUNGAL EFFECTS
MARIA DEL PILAR PONCE-JIMÉNEZ, FERNANDO A. LÓPEZ-DELLAMARY TORAL, & HUMBERTO GUTIERREZ-PULIDO
ABSTRACT—In search of alternatives for the professional conservator to use in the struggle against fungi that deteriorate paper documents, we decided to research chitosan, given its antimolding and strengthening properties. This, the second of two articles on the results, reports on the antifungal effects. We used samples of Whatman no. 1 filter paper sized with three chitosan salts—chitosan acetate (AQ), chitosan butyrate (BQ), and chitosan propionate (PQ)—and three cellulose ethers— carboxymethylcellulose (CMC), methylcellulose (MC), and hydroxypropylmethylcellulose (HPMC). They were sterilized with ethylene oxide (EtO) and inoculated with Chaetomium globosum, Aspergillus niger, Aspergillus terreus, Alternaria alternata, Penicillium sp., and Chaetomium britannicum spores. After the biological tests, chitosan salts showed considerably more antifungal resistance and improved resistance in paper compared with cellulose ethers.
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