Ali Akbar Zolriasatein* Pages 1 - 9 ( 9 )
Objective: Cellulose acetate fabric was bio-treated by lipase enzyme. Afterwards, untreated and bio-treated fabrics were dyed with direct and disperse dyes in conventional methods.
Methods: Enzymatic deacetylation of cellulose acetate fibers led to an improvement in hydrophilicity. The whiteness index of cellulose acetate fabric slightly decreased from 95.81 to 95.79 after bio-pretreatment.
Results: Lipase pre-treatment also caused an increase in fiber diameter of up to 54.80%. Bending length decreased from 1.95 to 1.80 cm after enzymatic treatment while the number of threads per centimeter and fabric thickness increased. Bio-treated fabric showed lower tensile strength in comparison to untreated fabric almost 52.48%. Change in the morphology of fibers was observed by SEM after enzymatic deacetylation. Bio-treated fabric showed an increase in color strength in comparison to the untreated fabric.
Conclusion: The lipase pretreatment increased the color strength by 19.04 % and 18.50 % for direct and disperse dyes respectively.
Cellulose acetate fabric, Lipase enzyme, Fiber diameter, Bending rigidity, Whiteness index, Color strength
Department of Textile Engineering, College of Technical and Engineering, Yadegar-e-Imam Khomeini (RAH) shahre-rey Branch, Islamic Azad University, Tehran