New Enzyme-based Process Direction to Prevent Wool Shrinking without Substantial Tensile Strength Loss

Lenting, H.B.M.; Schroeder, Marc; Guebitz, Georg M.; Cavaco‐Paulo, Artur; Shen, Jinsong

doi:10.1007/s10529-006-9048-0

Cited by 36 publications

(17 citation statements)

References 8 publications

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“…For the wool fabric treated with protease alone, there was no remarkable change in the wettability, indicating that no obvious hydrolytic cleavage of the bound lipids had occurred in the cuticle membrane of the wool. In other words, protease molecules themselves did not have an effect on the hydrophobic aliphatic esters on the wool surface; they preferably penetrated into the fiber cortex, resulting in moderate removal of the interior peptide and protein segments . Therefore, the wettability of the protease‐treated wool was not as satisfactory as that after MPH treatment.…”

Section: Resultsmentioning

confidence: 99%

Bio‐antifelting of wool based on mild methanolic potassium hydroxide pretreatment

Wang

Yuan²,

Ren³

et al. 2012

Engineering in Life Sciences

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Covalently bound lipids cover the wool surface and make enzymatic degradation of wool scales very difficult. In this paper, methanolic potassium hydroxide (MPH) pretreatment was used prior to enzymatic treatment of wool with protease, aiming at hydrolyzing the outmost lipids on the wool surface and promoting the subsequent proteolytic reaction. The efficacy of lipid removal from the fiber surface and the properties of the protease‐treated wool were evaluated. The results indicated that mild MPH pretreatment with 0.10 mol/L MPH for 10 min improved the wettability of the wool without adverse impacts on its mechanical properties. The wetting time and area shrinkage of the wool fabric reached 0.5 s and 5.6%, respectively, and the strength loss was within the acceptable range. Pretreatment with high concentrations of MPH for longer times led to significant damage to the wool fibers and caused heavy strength loss, without improving the antifelting properties after protease treatment. Thus, the combination of mild MPH and protease treatments endowed the wool with desirable properties in contrast to the treatment with protease alone.

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Section: Resultsmentioning

confidence: 99%

Bio‐antifelting of wool based on mild methanolic potassium hydroxide pretreatment

Wang

Yuan²,

Ren³

et al. 2012

Engineering in Life Sciences

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“…Some of these processes have been tested on industrial process scale (Shen et al 2007). Pretreatment of wool fibres with hydrogen peroxide, at alkaline pH in the presence of high concentrations of salts, also targets enzymatic activity to the outer surface of wool, by improving the susceptibility of the cuticle to proteolytic degradation (Lenting et al 2006).…”

Section: Enzymatic Treatment Of Woolmentioning

confidence: 99%

Application of enzymes for textile fibres processing

Araújo

Casal

Cavaco‐Paulo

2008

Biocatalysis and Biotransformation

260

127

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This review highlights the use of enzymes in the textile industry, covering both current commercial processes and research in this field. Amylases have been used for desizing since the middle of the last century. Enzymes used in detergent formulations have also been successfully used over the past 40 years. The application of cellulases for denim finishing and laccases for decolourization of textile effluents and textile bleaching are the most recent commercial advances. New developments rely on the modification of natural and synthetic fibres. Advances in enzymology, molecular biology and screening techniques provide possibilities for the development of new enzyme-based processes for a more environmentally friendly approach in the textile industry.

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“…Considerable researches have shown that protease treatment can improve the dyeability and shrink resist of wool . However, the outer surface of the scales are highly cross‐linked and in practice hardly substrate for proteolytic enzymes . To make enzymatic action effective, the outer scale protein still has to be modified prior to enzymatic incubation.…”

Section: Introductionmentioning

confidence: 99%

Promotional effect of 1‐butyl‐3‐methylimidazolium chloride ionic liquid on the enzymatic finishing of wool

Yuan¹,

Wang²,

Wang³

et al. 2012

Engineering in Life Sciences

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To improve the effects of protease finishing on wool, 1-butyl-3-methylimidazolium chloride ionic liquid was employed as a pretreatment reagent. It was found that ionic liquid pretreatment significantly changed the wool surface characteristics. The Allwördern reaction showed that the epicuticle layer was damaged by the ionic liquid, and X-ray photoelectron spectroscopy analysis further demonstrated that the surface elemental composition was significantly changed. Ionic liquid pretreatment remarkably improved the accessibility of protease to the wool and thus accelerated the hydrolysis rate of keratin. The properties of wool fabric after combined processing were also changed. Dyeability results showed that the color depth was increased but the wet rubbing and washing fastness of wool fabrics showed a decreased half grade. The wettability results demonstrate that the contact angle was further reduced after the comprehensive treatment because of the exposure of more proteins under the fatty-acid layer. In addition, the shrink proofing of wool fabric was also enhanced after combined processing. In summary, ionic liquid modification presents a promising pretreatment method for protease processing of wool.

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New Enzyme-based Process Direction to Prevent Wool Shrinking without Substantial Tensile Strength Loss

Cited by 36 publications

References 8 publications

Bio‐antifelting of wool based on mild methanolic potassium hydroxide pretreatment

Bio‐antifelting of wool based on mild methanolic potassium hydroxide pretreatment

Application of enzymes for textile fibres processing

Promotional effect of 1‐butyl‐3‐methylimidazolium chloride ionic liquid on the enzymatic finishing of wool

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