Notice catalographique « Chitosan as a consolidant for fragile silk »
- Titre
- Chitosan as a consolidant for fragile silk
- Auteur ou éditeur
- Kata, Sonia
- Lieu de publication
- Kingston, Ontario
- Maison d'édition
- Queen's University
- Date de publication
- 2013
- Collation
- viii, 63 p., ill., 28 cm.
- Résumé
- Silk textiles in museum collections are often degraded and fragile, but no satisfactory treatment currently exists to strengthen or consolidate deteriorated silk. Recently, chitosan has been investigated as a consolidant for artifacts, including silk textiles. Chitosan is the N-deacetylated derivative of chitin, a linear polysaccharide found in the exoskeleton of crustaceans and other natural sources. Chemically, chitosan is (1 4)-2-amino-2-deoxy-ß-D-glucopyranose, which has a chemical structure similar to cellulose, but with an amino or acetyl functional group substituting the hydroxyl group at carbon #2. Among its many properties, chitosan is non-toxic, anti-microbial, soluble in dilute acids, non-soluble in organic solvents, and capable of hydrogen and electrostatic bonding with organic substrates. Importantly, chitosan is capable of coating and strengthening textile fibres. Chitosan was applied to silk fabrics to test its effectiveness and suitability as a consolidant for textile conservation. Chitosan was dissolved in dilute acetic acid in distilled water to give 0.5% or 1% w/v solutions. The sample substrates were a new, white silk habutai fabric, and two naturally aged and degraded silk damask fabrics. Silk samples were treated by immersion in 1% or 0.5% chitosan solutions for 15 minutes followed by rinsing in distilled water for five minutes, or simply by immersion in 0.5% w/v chitosan without subsequent rinsing. Some samples were artificially aged by 100 hours of thermal aging at 50°C and 65% RH, and light aging under a bank of fluorescent lights. Tests were conducted to assess the strengthening effect of chitosan, and to see if treatment caused stiffening or colour change in the silk substrates. Samples were imaged by optical microscopy and scanning electron microscopy; tested for tensile strength, stiffness, pH, and colour change; spot-tested with solvents; and analyzed by Fourier transform infra-red spectroscopy and x-ray fluorescence.
- Notes
- inc. tables
- Langue
- English = Anglais
- Sujet
- Textile fabrics - Silk
- Textile fabrics - Conservation and restoration
- Textile chemistry
- Chitosan
- Textiles et tissus - Soie
- Textiles et tissus - Conservation et restauration
- Chimie textile
- Chitosane
- Pays
- Canada
- Type de document
- Monograph = Monographie
- Localisation
- QD 321 K38
- Clé
- 17083
- Collection
- Catalogue