4.7 Article

Optimization of Textile Waste Blends of Cotton and PET by Enzymatic Hydrolysis with Reusable Chemical Pretreatment

Journal

POLYMERS
Volume 15, Issue 8, Pages -

Publisher

MDPI
DOI: 10.3390/polym15081964

Keywords

pretreatment; optimization; hydrolysis yield; textile waste; PET; cellulose

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In this study, various pretreatment methods were applied to textile waste with different cotton/polyester blending ratios. The optimal condition for enzymatic hydrolysis was a 60/40 textile waste blend of cotton/PET with a reusable chemical pretreatment. The findings suggest a promising solution for textile waste recycling.
Textile waste usually ends up in landfills and causes environmental pollution. In this study, pretreatment methods for textile recycling, including autoclaving, freezing alkali/urea soaking, and alkaline pretreatment, were applied to textile waste with various cotton/polyester blending ratios. The best condition for enzymatic hydrolysis was a 60/40 textile waste blend of cotton/polyethylene terephthalate (PET) with a reusable chemical pretreatment (15% NaOH) at 121 degrees C for 15 min. The hydrolysis of pretreated textile waste by cellulase was optimized using response surface methodology (RSM) based on central composite design (CCD). The optimized conditions were 30 FPU/g of enzyme loading and 7% of substrate loading, which resulted in a maximum observed value of hydrolysis yield at 89.7%, corresponding to the predicted value of 87.8% after 96 h of incubation. The findings of this study suggest an optimistic solution for textile waste recycling.

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