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Control Number307994
Date and Time of Latest Transaction20180522074311.AM
General Information180522s |||||||||b ||00|||
Cataloging SourceSTII-DOST
Language Codeeng
Local Call NumberFil(S) TS1300 S42 v.11 2011
Main Entry - Personal NameUson, Rachael A.
 Fenoy, Rudy C.
Title StatementExtraction, characterization, and application of native chitosan from crab (Portunus pelagicus) shells as biomordant and anti-microbial finish for naturally-dyed textiles by Rachael A. Uson, Rudy C. Fenoy
Physical Description29-45 graphs, pictures, tables
Summary, Etc.     Chitosan is a high-molecular-weight linear polycationic heteropolysaccharride, comprising copolymers of ß-1,4-linked D-glucosamine and N-acetyl-D-glucosamine. In this study, chitin was extracted from crab (Portunus pelagicus) shells by demineralization and deproteinization, and then converted to chitosan through deacetylation. The produced chitosan and standard commercially-available chitosan from Sigma-Aldrich were compared by UV-Vis spectrophotometer and Fourier Transform Infrared Spectroscopy (FTIR). The spectra revaled the same profile and confirmed that the native chitosan was successfully extracted from crab shells. Treatment parameters such as pH, steeping time, temperature and percent chitosan loading were optimized using standard chitosan for application onto silk (Bombyx mori) yarns, abaca (Musa textilis), cotton (Gossypium spp.), and pineapple-silk (Ananas comosus-Bombyx mori) fabrics. The optimized parameters were applied to said materials using the native chitosan and then dyed with aqueous talisay (Terminalia catappa) leaf extracts using established dyeing procedures. Knitted cotton fabrics were applied with chitosan through pad-dry-cure approach using a laboratory-scale padding mangle. The antimicrobial activity of dyed, chitosan-treated samples, native and standard, was evaluated for activity against Staphylococcus aureus using AATCC Test Method 100-2004. Results showed the comparable antimicrobial activity of the native and standard chitosan as shown in the assays. Physical properties including colorfastness to perspiration and laundering using AATCC Test Methods 61 and 15, respectively, were conducted and revealed ratings ranging from 3.5 to 4.5 in the gray scale. The colorimetric properties assessed using the CIE Lab color space with illuminant D65 at 10° standard observer were also noted. The added functionality of chitosan applied using a straightforward approach enables the development of functional and anti-microbial all-natural Philippine textiles. (Author's abstract)
Subject Added Entry - Topical TermScience and technology
 Portunus pelagicus
 Fourier Transform Infrared Spectroscopy (FTIR)
 AATCC Test Method 100-2004
 Bombyx mori
 Gossypium spp
 Musa textilis
 Terminalia cattapa
 
     
 
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