Enzymatic surface modification of acrylonitrile fibers

Battistel, Ezio; Morra, Marco; Marinetti, Massimo

doi:10.1016/s0169-4332(01)00193-3

Cited by 69 publications

(53 citation statements)

References 8 publications

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“…The content of C1s of the acrylic fabric decreased after nitrilase treatment (Table 3). Thus, we The newly generated carboxylate ions on the fabric surface influenced the wettability of the fabrics (Battistel, 2001;Kim & Song, 2010;Wang et al, 2004). Fig.…”

Section: Effects Of Nitrilase Hydrolysis On the Fabric Surfacesmentioning

confidence: 98%

“…Surface modification is considered to be a valuable tool for improving the quality of fibers (Battistel et al, 2001). Conventional methods for modifying synthetic polymers, acrylic fibers, use strong chemicals at high temperatures.…”

Section: Introductionmentioning

confidence: 99%

“…Conventional methods for modifying synthetic polymers, acrylic fibers, use strong chemicals at high temperatures. By the alkaline hydrolysis (e.g., NaOH), the nitrile groups (-CN-) in acrylic fibers converted into carboxylate ions (COONa) on fabrics and ammonia (NH 4 OH), thus on the surface of fabrics carboxylate ionic groups were formed (Battistel et al, 2001;Bornscheuer & Kazlauskas, 2005;Gübitz & Cavaco-Paulo, 2003;Kobayashi & Shimizu, 2000;Matamá, et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…Acrylic fibers hydrolyzed respect to the environmental impact, however, biotechnologies, such as enzymatic catalysis-based techniques, are required to modify acrylic fibers with a reduced need for harsh chemicals (Battistel et al, 2001). There are two different pathways for the enzymatic modification of polyacrylonitrile (acrylic) fibers: One method uses nitrile hydratases (NHase, EC 4.2.1.84; lyase), and the other uses nitrilases (EC 3.5.5.1) (Babu et al, 2011;Bornscheuer & Kazlauskas, 2005;Kobayashi & Shimizu, 2000).…”

Section: Introductionmentioning

confidence: 99%

“…There are two different pathways for the enzymatic modification of polyacrylonitrile (acrylic) fibers: One method uses nitrile hydratases (NHase, EC 4.2.1.84; lyase), and the other uses nitrilases (EC 3.5.5.1) (Babu et al, 2011;Bornscheuer & Kazlauskas, 2005;Kobayashi & Shimizu, 2000). NHase hydrolysis involves two enzymes: NHase, which catalyzes the hydrolysis of a nitrile to an amide and amidase (EC 3.5.1.4), which sequentially converts the amide to carboxylate ions and ammonia (Battistel et al, 2001;Kobayashi & Shimizu, 2000;Tauber et al, 2000). In the other pathway, nitrilase (EC 3.5.5.1) directly hydrolyzes the nitrile to produce ammonia and the corresponding carboxylate ions on the fabric surface.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Commercial Nitrilase Hydrolysis on Acrylic Fabrics

Kim¹,

Seo²

2016

SFTI

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: This study aims to evaluate the hydrolytic activity of a commercial nitrilase and optimize nitrilase treatment conditions to apply eco-friendly finishing on acrylic fabrics. To assess the possibility of hydrolyzing nitrile bonds in acrylic fabric using a commercial nitrilase, the amounts of hydrolysis products, ammonia and carboxylate ions, were measured. The treatment conditions were optimized via the amount of ammonia. The formation of carboxylate ions on the fabric surface was detected by X-ray photoelectron spectroscopy and wettability measurements. After nitrilase treatment, ammonia was detected in the treatment liquid; thus, nitrilase hydrolyzed the nitrile bonds in acrylic woven fabric. The largest amount of ammonia was released into the treatment liquid under the following conditions: pH 8.0, 40°C, and a treatment time of 5 h. The formation of carboxylate ions on the acrylic woven fabric surface by nitrilase hydrolysis was proven by the increased O1s content measuring of XPS analysis. From comparison of the results of nitrilase and alkaline hydrolysis, the white index and strength of the alkali-hydrolyzed acrylic fabric decreased, whereas those of the nitrilase-hydrolyzed samples were maintained. The nitrilase hydrolysis improved the sensitivity of acrylic fabrics to basic dye similarly to alkaline hydrolysis without the drawbacks of yellowing and decreased strength caused by alkaline hydrolysis.

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Section: Effects Of Nitrilase Hydrolysis On the Fabric Surfacesmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of Commercial Nitrilase Hydrolysis on Acrylic Fabrics

Kim¹,

Seo²

2016

SFTI

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Biotransformation of Synthetic Fibers

Silva¹,

Matamá²,

Cavaco‐Paulo³

2010

Encyclopedia of Industrial Biotechnology

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Recent studies clearly indicate that the modification of synthetic polymers with enzymes is an environmentally friendly alternative to traditional chemical methods requiring harsh conditions. Some work already performed on polyamide 6.6 (nylon 6.6), polyethyleneterephthalate (PET) and polyacrylonitrile (PAN) revealed that surface functionalization of these materials is a key requirement for an extensive range of applications, such as textiles, electronics, biomedical field and others. Research performed on PET with lipases, cutinases and other esterases has previously been reported, whilst enzymatic treatment of PAN with nitrilases and cutinase has also been the subject of study. However, at present, few studies have been done on nylon fabrics, mainly with esterases and proteases. This work is intended as a brief review of research in the area of biocatalytic functionalization of synthetic fibres, with a special focus on work recently performed by our research group with cutinase from Fusarium solani pisi.

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Biocatalytic Hydrolysis of Nitriles

Brady¹

2010

Handbook of Green Chemistry

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Enzymatic surface modification of acrylonitrile fibers

Cited by 69 publications

References 8 publications

Effects of Commercial Nitrilase Hydrolysis on Acrylic Fabrics

Effects of Commercial Nitrilase Hydrolysis on Acrylic Fabrics

Biotransformation of Synthetic Fibers

Biocatalytic Hydrolysis of Nitriles

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