Cellulase Treatment of Cotton Fabrics

Ueda, Mitsuo; Koo, H.; Wakida, Tomiji; Yoshimura, Y.

doi:10.1177/004051759406401010

Cited by 17 publications

(9 citation statements)

References 7 publications

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“…5, the degree of weight loss by EGL3 on the nondyed cotton fabric was not almost activated by the addition of nonionic surfactant. This result is almost consistent with the case of cellulase from T. viride reported by Ueda et al [5]. However, the degree of weight loss by RCE1 was extremely activated by the addition of nonionic surfactant (Fig.…”

Section: Effect Of Nonionic Surfactant On the Degree Of Weight Loss Bsupporting

confidence: 92%

“…Cellulases have been widely applied for textile processing, and used for improvement of the quality of cellulosic fabrics such as softening, microfibril-removal, pilling-prevention, improvement of touch-feel, and changing some appearance [1][2][3][4]. It is known that the enzymatic reaction of cellulase in the treatment of cellulosic fabrics is affected not only by pH and temperature, but also by co-existing chemicals such as dyes or surfactants [5]. Furthermore, since surfactants are typical auxiliaries used in dyeing and finishing processes, it is very important to have a detailed knowledge of effects of surfactants or dyes on the cellulase treatment [5].…”

Section: Introductionmentioning

confidence: 99%

“…It is known that the enzymatic reaction of cellulase in the treatment of cellulosic fabrics is affected not only by pH and temperature, but also by co-existing chemicals such as dyes or surfactants [5]. Furthermore, since surfactants are typical auxiliaries used in dyeing and finishing processes, it is very important to have a detailed knowledge of effects of surfactants or dyes on the cellulase treatment [5]. Koo et al reported that both direct and reactive dyes on the substrate apparently inhibited the enzymatic reaction of cellulase from Trichoderma viride [6].…”

Section: Introductionmentioning

confidence: 99%

“…Ueda et al reported that anionic surfactant inhibited the enzymatic reaction of cellulase from T. viride in the treatment of cotton fabrics, whereas nonionic surfactant did not effect on the activity [5].…”

Section: Introductionmentioning

confidence: 99%

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Specific Characteristics of an Endoglucanase RCE1 from Rhizopus Oryzae in the Treatment of the Dyed Cotton Fabrics

Nakane¹,

Koga²,

Kubota³

et al. 2005

Sen-i Gakkaishi

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In the textile and detergent industries, endoglucanases have been used to remove microfibrils from the surface of cellulosic fabrics, enhancing the softness and the color brightness. We examined the characteristic differences between an endoglucanase RCE1 from Rhizopus oryzae and an endoglucanase EGL3 from Humicola grisea in the treatment of the dyed cotton fabrics. The weight loss degree of the cotton fabrics by EGL3 decreased with increases in the concentration of reactive or direct dye on the cotton fabrics, whereas that by RCE1 increased with increases in the concentration of reactive or direct dye on the cotton fabrics. The weight loss degree of the nondyed or dyed cotton fabric by EGL3 was not almost activated by the addition of nonionic surfactant, whereas that by RCE1 was extremely activated by the addition of nonionic surfactant. These results indicate that RCE1 has specific characteristics that are activated by dye or nonionic surfactant in the treatment of cellulosic fabrics.

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Section: Effect Of Nonionic Surfactant On the Degree Of Weight Loss Bsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Specific Characteristics of an Endoglucanase RCE1 from Rhizopus Oryzae in the Treatment of the Dyed Cotton Fabrics

Nakane¹,

Koga²,

Kubota³

et al. 2005

Sen-i Gakkaishi

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“…, Attempts have been made to identify the sources of these problem fibers. Poor dye uptake has been associated with fibers on seeds weighing less than 80 mg [ 14 ] . Large proportions of these poorly dyed and lower-weight seed fibers are found in outer-position and upper-position bolls on plants.…”

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confidence: 99%

Dyeing Characteristics of Acala Cotton Seed Fibers

Thompson

Hsieh

1998

Textile Research Journal

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The dyeing characteristics of fibers from three Acala cotton varieties, i.e., Maxxa, SJ-2, and SJC-9, are investigated using direct and reactive dyestuffs along with the Goldthwait cotton maturity test. Dyed and less-dyed fibers are detached from the dyed seed fibers, separated, and characterized by seed fiber weight, single fiber strength, and color measurement. With Direct Blue 1, SJC-9 fibers are dyed to the darkest shade across all seed fiber weights, whereas the Maxxa fibers have the lightest shade. The SJC-9 seed fibers have the least amounts ( ~5%) of less-dyed fibers and the proportions of such fibers are independent of seed fiber weights. For the Maxxa and SJ-2 varieties, the proportions of less-dyed fibers decrease with increasing seed fiber weights. The proportions of less-dyed Maxxa and SJ-2 fibers are above 30% on seed fibers weighing less than 100 mg and are 10% or less on seeds weighing more than 150 mg. The SJ-2 seed fibers contain higher proportions of less-dyed fibers, but their overall shades are deeper than the Maxxa fibers. For all three varieties, most less-dyed fibers are from the chalazal ends of the seeds of all seed fiber weights. Dyeing with Reactive Blue 19 results in the same proportions of less-dyed fibers on the Maxxa seed fibers as with Direct Blue 1. The Goldthwait cotton maturity test confirms the trend of decreasing amounts of less-dyed fibers with increasing seed fiber weight with both direct and reactive dyes. For all three varieties, the force to break is higher for the dyed fibers than the less-dyed fibers, confirming that less-dyed fibers have less developed cell wall structures.Lack of dyeing uniformity in cotton products has been a long-standing concern of the textile processing industry. Dyeing problems with cotton products are thus far associated with less or undeveloped fibers or with fiber immaturity. These dyeing defects are not evident until after the fabrics have been dyed, and they greatly reduce fabric quality, desirability, and value. Considering the significant impact on product quality, however, literature on efforts to understand and solve these dyeing uniformity problems has been modest [ 2-6, II -18. 201.Most such dyeing defects have been associated with neps, specks, and seed coat fragments [ 1, 11 ) . Discussions of neps date back to 1848 in Clegg and Harland's s [ 5 ] review. Neps have had a number of slightly varying definitions: generally, they are clusters of tangled immature or dead fibers that are predisposed to snarling or clumping because of their thin cellulose cell wall and low resistance to bending. Dyeing defects caused by neps have been categorized into three types [ 18 ] . One type consists of matted fibers that are dyed to a similar depth as the rest of the fabric, but appear lighter because of the higher reflectance of their flat surfaces. Another type consists of immature fibers that fail to dye to the same shade or depth as the remaining fibers. The third type occurs when surface neps are removed after dyeing, leaving white or lighter sp...

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