title: Laccase-mediated system pretreatment to enhance the effect of hydrogen peroxide bleaching of cotton fabric.
abstract: This study evaluates the bleaching efficiency of the hydrogen peroxide bleaching process combined with laccase-mediated system pretreatment (LMS-HPBP) in the treatment of scoured cotton fabric. By changing the factors of laccase-mediated system pretreatment and the hydrogen peroxide bleaching process and examining the subsequent whiteness value and retained tensile strength of the samples, we find three LMS-HPBP processes that are more environment friendly than the conventional hydrogen peroxide bleaching process (CHPBP): (i) bleaching with lower dosage of hydrogen peroxide; (ii) bleaching at reduced temperature; (iii) bleaching for shortened duration. Whiteness, retained tensile strength and K/S values of cotton fabric samples treated by i-iii processes were similar to or higher than those by CHPBP. X-ray diffraction (XRD) analysis also demonstrated that the three processes rendered fabric of both lower crystallinity and bigger crystallite size than those by CHPBP. In addition, the "green" short-flow process was developed to treat cotton fabric and the results obtained shows this method is feasible as a new energy-saving process.
authors.affiliation: College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, PR China.
authors.forename: Liqiang
authors.initials: L
authors.lastname: Tian
authors.forename: C
authors.initials: C
authors.lastname: Branford-White
authors.forename: Wen
authors.initials: W
authors.lastname: Wang
authors.forename: Huali
authors.initials: H
authors.lastname: Nie
authors.forename: Limin
authors.initials: L
authors.lastname: Zhu
mesh_terms: D057886:Bleaching Agents / Q000737:chemistry*; D032561:Cotton Fiber; D005240:Feasibility Studies; D055772:Green Chemistry Technology / Q000191:economics / Q000379:methods*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D042845:Laccase / Q000378:metabolism*; D013696:Temperature; D055454:Trametes / Q000201:enzymology; D014230:Triazoles / Q000737:chemistry
chemical_list: D057886:Bleaching Agents; D014230:Triazoles; C011852:1-hydroxybenzotriazole; D006861:Hydrogen Peroxide; D042845:Laccase