Abstract
A sodium chlorite bath for scouring and bleaching of linen fabric by a one-step process is activated by glyoxal as an organic-reducing compound having two aldehyde functional groups. Such activator has been found to be effective in bringing about the progressive decomposition of sodium chlorite. The treatment was achieved under a variety of conditions, and the bleaching effect of sodium chlorite/glyoxal system was appraised by monitoring the treated samples for the degree of whiteness (WI), loss in fabric weight (LW), wettability (W), carbonyl (CO) content, carboxyl (COOH) content, percentage of sodium chlorite decomposed, and tensile strength (TS). The best conditions for concurrent desizing, scouring, and bleaching of linen fabric with excellent whiteness index and acceptable tenacity were found to be 60°C and at initial pH of 10.35, with aqueous solution containing 5g/L NaClO2 , glyoxal 6 mmol/L, and 2g/L wetting agent for 120 min using the material-to‐liquor ratio (M/L) 1:30. Tentative mechanisms were also reported to account for the bleaching action of NaClO2 /glyoxal system.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
