Journal of Fiber Science and Technology
Online ISSN : 2189-7654
ISSN-L : 2189-7654
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Enzymatic Hydrophilization of Polyester Fabrics Using a Recombinant Cutinase Cut 190 and Their Surface Characterization
Fusako KawaiTokuzo KawaseTakeshi ShionoHiroshi UrakawaSachiko SukigaraChendi TuMasaki Yamamoto
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JOURNAL OPEN ACCESS

2017 Volume 73 Issue 1 Pages 8-18

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Abstract

Polyester fabrics (poly(ethylene terephthalate) (PET) and Ecoface®) were treated with a recombinant cutinase, Cut 190*, from a thermophilic actinomycete (Saccharomonospora viridis AHK 190) for a bio-hydrophilization of polyester fabric surface. After incubation of amorphous PET film with Cut 190* at 50 ̊C,contact angles of water and formamide on the enzyme treated film decreased and polar component of surface free energy, γsd, increased to show the enzyme-hydrophilization of PET surface, indicating the increase of hydrophilic groups (COOH and OH) on the film surface. Similarly, polyester fabrics were treated by Cut 190* at 65 ̊C, and their surfaces were characterized using scanning electron microscopy (SEM), Attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIR), X-ray photoelectron spectroscopy (XPS) analyses. Enzyme-treated polyester fabrics did not display significant changes by SEM and ATR-FTIR analyses. However, XPS analysis showed that the enzyme-treatment induced significant changes in the region of 3-5 nm depth from the surface. Only enzyme-treated polyester fabrics showed capillary rise of water, which was explained in terms of the increase in surface hydrophilicity. Increased color density of the enzyme-treated fabrics with methylene blue also suggested the increment of COOH groups on the fabric surface. On the other hand, the enzyme treatment did not affect tensile properties, supporting that the enzymatic hydrolysis is limited to the surface of fabrics.

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© 2017 The Society of Fiber Science and Technology, Japan
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