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Journal: JOURNAL OF APPLIED RESEARCHES IN CHEMISTRY (JARC) | Year:1389 | Volume:4 | Issue:13 | Start Page:13 | End Page:21

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Information Journal Paper

Title

ENZYMATIC HYDROLYSIS OF NYLON 66 FIBERS USING PROTEASE ENZYME

Writers

PARVINZADEH M.

Pages

 Start Page 13 | End Page 21

Abstract

 In recent years, biotechnology has formed many applications in dyeing and finishing sectors of textile industry. Enzymes are protein compounds which can participate in many reactions in textile wet processing. The purpose of this study is to improve NYLON 66 fiber structures and to study different properties including dye ability, moisture absorption, surface changes and color fastness using lipase enzyme. To that end, NYLON 66 fabrics were first treated with different concentrations of PROTEASE ENZYME in water solution including 3, 6 and 9% o.w.f.. The dyeing process was then carried out on the treated fabrics with ACID DYEs. The results of color measurement on enzyme treated/dyed with these two class of dyes showed that the L* values of enzyme treated samples decreased and more decrease in L* value was observed with an increase in the enzyme percentage. The results of ACID DYEs exhaustion on treated fibers showed higher absorption of dyes on fibers. Tensile strength studies indicated that enzymatic processing decrease tenacity, modulus and elongation at break of nylon 6 fabric. Thermal studies of enzyme treated sample did not show significant changes on orientation of fiber after enzyme treatment up to the temperature of 300°C. But increase in heating temperature of the sample in the range of 300-400°C showed considerable decrease in thermal degradation temperature of enzyme treated sample compared to non-treated one. The wash and light fastness properties of samples were measured according to ISO 105-CO5 and Daylight ISO 105-BO1. Enzyme treatment before dyeing process improves wash and light fastness of samples which could be the result of dyes penetration into the fibers.

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