Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (06): 73-78.doi: 10.13475/j.fzxb.20180506506

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Wool anti-felting treatment based on modified protease

MEI Jingxia, ZHANG Nan, WANG Qiang(), YUAN Jiugang, FAN Xuerong   

  1. Key Laboratory of Eco-Textiles(Jiangnan University), Ministry of Education, Wuxi, Jiangsu 214122, China
  • Received:2018-05-25 Revised:2019-03-09 Online:2019-06-15 Published:2019-06-25
  • Contact: WANG Qiang E-mail:qiangwang@jiangnan.edu.cn

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Abstract:

Aiming at the severe damage to wool fiber and weak hydrolysis of keratin in scale caused by protease during wool fabric anti-felting finishing, protease was chemically modified with HOOC-PEG-COOH and L-cysteine to enlarge its volume so as to limit its hydrolysis to the surface of fiber and to be endued with the capability of reducing disulfide bonds in keratin. The anti-felting effect, the surface morphology, wetting properties and the degree of enzymolysis on wool fabric finished with the modified protease were further investigated by the dimensional stability to felting, breaking strength, SEM, contact angle, Allworden reaction and methylene blue coloration. The results show that the dimensional stability to felting and strength loss of wool fabrics finished with modified protease are superior to those of native protease. In addition, the hydrolysis of modified protease is limited to the scale layer of wool, and the modified protease is more harmful than unmodified protease for wool scale.

Key words: wool, protease, anti-felting finishing, chemical modification, scale, keratin

CLC Number: 

  • TS195.5

Fig.1

Dimensional stability to felting(a) and strength loss(b) of wool fabrics treated with different proteases after different treatment time"

Fig.2

Contact angles of wool fabrics at 100 s after different enzymatic treatments. (a) Raw wool; (b) Buffer treatment; (c) Savinase treatment; (d) L-cysteine/Savinase treatment; (e) SAV-PEG-L-cys treatment"

Fig.3

Allworden reactions of wool fibers after different enzymatic treatments (×400). (a) Raw wool; (b) Buffer treatment; (c) Savinase treatment; (d) L-cysteine/Savinase treatment; (e) SAV-PEG-L-cys treatment"

Fig.4

SEM images of wool fabrics after different enzymatic treatments for 3 h(×1 500). (a) Raw wool; (b) Buffer treatment; (c) Savinase treatment; (d) L-cysteine/Savinase treatment; (e) SAV-PEG-L-cys treatment"

Fig.5

Photographs of wool fibers after different enzymatic treatments (×400). (a) Raw wool; (b) Buffer treatment; (c) Savinase treatment; (d) L-cysteine/Savinase treatment; (e) SAV-PEG-L-cys treatment"

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