Improving Colorant Absorption from Pistachio Hulls on Wool Fiber Using Protease Enzyme

Nowadays, textile processing based on biotechnology has gained itsimportance in the view of stringent environmental and industrial safetyconditions. the use of protease enzymes in protein fibers to improvesome physical and mechanical properties is particularly interesting. in thisresearch, wool yarns were first treated with different concentrations of proteaseenzymes in aqueous solution including 1%, 2%, 4% and 6% o.w.f. for 60minutes. the dyeing process was then applied on the treated yarns with pistachiohulls as a fruit waste. some of physical, mechanical and colorimetric propertiesof the treated wool yarns were discussed. tensile strength of the treated yarnswas decreased due to the enzyme treatment and it continued to decrease with anincrease in the enzyme concentration in solution. lightness was decreased forthe samples treated with enzymes. the wash and light fastness properties ofsamples were measured according to iso 105-co5 and daylight iso 105-bo1.the washing fastness properties of the treated samples were not changed. in thecase of light fastness properties, it was increased a little for 4% and 6% enzymetreated samples. prog. color colorants coat. 2(2009), 1-6. © institute for colorscience and technology.