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

Wang, Ping; Yuan, Jiugang; Ren, Xiaofeng; Cui, Li; Wang, Qiang; Fan, Xuerong

doi:10.1002/elsc.201200015

Cited by 6 publications

(4 citation statements)

References 25 publications

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“…Quantitative analysis of amino acids were determined using an Agilent 1100 series HPLC system (Agilent Technologies, Santa Clara, CA, USA) according to the present method . A known amount of fibroin membrane was incubated in 5 mol/L hydrochloric acid at 110 °C for 24 H, and then the hydrolyzed solution was transferred and evaporated to dryness.…”

Section: Methodsmentioning

confidence: 99%

Preparation of antibacterial silk fibroin membranes via tyrosinase‐catalyzed coupling of ε‐polylysine

Wang

Deng

Yuan

et al. 2015

Biotech and App Biochem

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Silk fibroins have good biocompatibility and could be used to form a variety of regenerated functional biomaterials. In this study, enzymatic oxidization of silk fibroins with tyrosinase (TYR) was carried out, followed by coupling of ε-polylysine (ε-PLL) for improving antibacterial ability of the fibroin-based biomaterial. Trinitrobenzene sulfonic acid (TNBS) was selectively used to incubate with silk fibroins prior to TYR treatment, aiming at preventing the self-crosslinking of silk fibroins during enzymatic oxidation. The results indicated that tyrosine residues in silk fibroins could be converted to reactive dioxyphenylalanine and o-quinone residues TYR successively. TNBS pretreatment inhibited the self-crosslinks of silk fibroins and promoted the successive coupling of ε-PLL to fibroin proteins with high graft yield. The combined use of TNBS, TYR, and ε-PLL treatments endowed fibroin membrane with satisfactory antibacterial ability against Staphylococcus aureus, and the obtained durability was also acceptable. The changes in surface potential and amine acid composition for the fibroin membranes verified the favorable actions of the combined treatment. The present method could be potentially utilized for enzymatic functionalization of various fibroin-based biomaterials.

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Section: Methodsmentioning

confidence: 99%

Preparation of antibacterial silk fibroin membranes via tyrosinase‐catalyzed coupling of ε‐polylysine

Wang

Deng

Yuan

et al. 2015

Biotech and App Biochem

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“…12,13 Although enzyme molecular weight can be increased by grafting, this significantly raises cost. [14][15][16] In summary, it is necessary to develop a facile and eco-friendly approach for surface modification to obtain better properties of wool.…”

Section: Introductionmentioning

confidence: 99%

Enhancing dye adsorption of wool by controlled and facile surface modification using sodium bisulphite

Jiang

Zhang

et al. 2021

Coloration Technology

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Wool is a natural biopolymer with special properties, including warmth retention and skin-friendliness. However, its application in the textile industry is limited by the scale layer that covers its surface, which prevents the efficient diffusion of dye into the interior of its fibres, and increases wool's susceptibility to shrinkage during washing. Here, dissolution with sodium bisulphite is used for wool surface modification. The properties of surface dissolved wool are comprehensively characterised, including strength loss, shrinkage rate and dyeability. The three-dimensional images indicated that scale layer was etched. Coupled with Fourier-transform infrared (FTIR) spectra, the test results of strength loss and shrinkage rate indicated that surface dissolution degree can be controlled by time and temperature, and that the process does not break the fibre's main body structure. Dyeability properties, including dye absorption rate, deepness and uniformity at a lower temperature were enhanced, indicating amenability to industrial production. Our findings highlight a novel, efficient method of modifying protein fibre surface for enhancing properties with potential for largescale application.How to cite this article: Jiang Z, Zhang Y, Zhang N, et al. Enhancing dye adsorption of wool by controlled and facile surface modification using sodium bisulphite.

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“…However, there are two main restricting factors for the cleaner industrial development of shrinkproofing finishing with enzyme. On the one hand, the reaction of enzyme with wool takes a long time to process and it is difficult to achieve the requirement of machine washable of the treated wool only through enzyme treatment [12] because there are a lot of hard keratins that have a high content of disulfide bonds in the cuticles of the wool fiber [13]. Disulfide bonds inhibit the reaction of the enzyme macromolecules with the wool scales.…”

Section: Introductionmentioning

confidence: 99%

Eco-Friendly and Highly Efficient Enzyme-Based Wool Shrinkproofing Finishing by Multiple Padding Techniques

et al. 2018

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Wool fibers usually need shrinkproofing finishing. The enzyme process is an eco-friendly technology but the traditional exhaustion treatment usually takes excessive time. This study developed a novel multiple padding shrinkproofing process of wool with Savinase 16L and an organic phosphine compound {[HO(CH2)n]3P, n ∈ (1, 10)}. SEM and XPS analyses were employed to compare the wool treated respectively by exhaustion and by padding to reveal the effect of multiple padding. The results showed that treated wool fiber achieved the requirement of machine-washable (area shrinkage less than 8% according to standard TM 31 5 × 5A) in 2.5 min by the padding process. The padding process can control the adsorbance of enzyme on wool, which makes treatment more uniform and avoids strong damage of the wool. Also, the removal efficiency of the disulfide bond was about 15 times as much as in the exhaustion treatment in 2.5 min. The average catalytic rate of the padding process was 14 times faster than the exhaustion process, and the process time (2.5 min) decreased by 32.5 min compared with the exhaustion process (35 min). Multiple padding techniques can achieve continuous production and replace the environmentally harmful chlorination process. Our results provide the underlying insights needed to guide the research of the enzyme process application.

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

Cited by 6 publications

References 25 publications

Preparation of antibacterial silk fibroin membranes via tyrosinase‐catalyzed coupling of ε‐polylysine

Preparation of antibacterial silk fibroin membranes via tyrosinase‐catalyzed coupling of ε‐polylysine

Enhancing dye adsorption of wool by controlled and facile surface modification using sodium bisulphite

Eco-Friendly and Highly Efficient Enzyme-Based Wool Shrinkproofing Finishing by Multiple Padding Techniques

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