Antibacterial textiles with improved efficacy and durability were produced by incorporation of the monoterpene thymol into b-cyclodextrin-grafted organic cotton. Grafting of b-cyclodextrin on fabric was done with citric acid as crosslinker in the presence of sodium hypophosphite by fixing at 150 C for 10 min. UV-Visible and FTIR spectral studies of b-cyclodextrin, b-cyclodextrin-grafted fabric, ungrafted fabric, thymol, and thymol-loaded fabric confirmed the inclusion of thymol on grafted fabric. Thymol was recovered from ungrafted and grafted fabric by extraction with ethanol and it was quantified by performing high-performance liquid chromatography (HPLC) analysis and its level was remarkably higher in grafted fabric. Thymol-loaded ungrafted and grafted fabrics were tested against Escherichia coli and Staphylococcus aureus by agar diffusion method and inhibition was more pronounced in E. coli. Inclusion of antibacterial agent into grafted fabric showed enhanced inhibition effect with durability after 10 cycles of washing, while it was not retained in ungrafted fabric. Grafting of cyclodextrin on fabric and inclusion of thymol into their cavity produced a durable antibacterial textile.

Modification of the fabric is one of the best routes to improve the affinity between dye and fabric. In this study, chemical modification of organic cotton fabric has been done by the greener way with the use of β-cyclodextrin and chitosan and the modification level were measured by dyeing with natural dye (Nyctanthes arbor-tristis) parijataka. Results of dyeing showed better dye uptake after modification on organic cotton fabrics, especially in chitosan modification. SEM and FTIR studies reveals about the surface modification and the presence of β-cyclodextrin and chitosan moiety on the modified fabric. CCM studies of modified and unmodified fabric reported that chroma (C*) values were found to be higher with modified fabric than unmodified fabric. Since the dyeability and other fastness properties of organic cotton are having better results. From an ecological point of view, organic cotton may be a better alternative to conventional cotton.

No abstract

Antibacterial finish was done on organic cotton by incorporation of thymol into monochlorotriazinyl-β-cyclodextrin. Fabric was modified with cyclodextrin derivative in alkaline condition. UV-Visible and FT-IR studies confirmed the presence of cyclodextrin derivative and thymol on modified fabric. The level of thymol entrapped into the fabric was determined quantitatively by HPLC analysis. Agar diffusion test was carried for unwashed and washed fabric against gram positive (S. aureus) and gram negative (E. coli) bacteria. The investigation revealed that modification of fabric with monochlorotriazinyl-β-cyclodextrin retained the antibacterial property even after 10 washing process.

No abstract