• 한국염색가공학회지
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• 제8권3호
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• pp.59-65
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• 1996

Cotton fabrics were treated by low temperature plasma and/or cellulase, and its physical and dyeing properties were investigated. All the pretreatments of the cotton with low temperature plasma of oxygen, nitrogen and argon slowed down the rate of weight loss of cotton in cellulase solution. Plasma pretreatment did not show any strength retention effect on cotton fiber in the subsequent cellulase treatment. Pretreatment of cotton with low temperature oxygen plasma decreased the rate of dyeing in direct dye bath, while cellulase or plasma/cellulase pretreatment increased the rate. Equilibrium dye uptake of cotton was not changed greatly by the pretreatments except the normal untreated cotton showed more or less high uptake. The pretreatment of cellulase with a water-soluble carbodiimide reduced the enzymatic activity, and did not show any strength retention of cotton in enzymatic weight loss.

• 한국펄프종이공학회:학술대회논문집
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• 한국펄프종이공학회 2000년도 춘계학술발표논문집
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• pp.39-46
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• 2000

In pulp and papermaking process, enzymatic treatment of pulp fibres has been a topic of increasing interest in last decade. Lots of patents, papers and research reports were published on the application of enzymes in the fields of enzymatic bleaching, deinking, slime control, pitch control, waste water treatment and fibre modification. Cellulase and hemicellulase are the principal enzymes used for the modification of fibre property. This study was carried out for determinating the behaviors of enzyme to pulp fibres. A commercial enzyme, Denimax BT which is consisted with cellulase and hemicellulase, was treated to the kraft pulp produced from domestic hardwood mixtures. Results were mainly concentrated on the behaviors of freeness, drainability and fines content of fibres, and physical properties of paper with enzyme treatment. The freeness levels and dewatering ability were developed, and the fines contents were decreased. The creation of fines were controlled by the method of pre-enzyme treatment prior to fibre beating. The mechanical strength of paper, like tensile, burst, tear strength and folding endurance, were remarkably improved by the pre-enzyme treatment.

• 한국의류학회지
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• 제14권4호
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• pp.262-273
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• 1990

The purpose of this study is to investigate the softening effect of cellulase-treated cotton fabric and the damage on the fabric which is accompanied by the treatemnt. Cotton fabric is treated with cellulase under various concentrations and time, and the weight loss, hand values (by KES), surface characteristics, moisture regain, tensile strength, copper number and intrinsic viscosity of the treated samples and untreated samples have been compared. The results are as follows: 1. The weight loss of cotton fabric increased as the concentration of cellulase and the treating time increased. 2. The enzyme treatment had little effect on the stiffness of the treated samples but anti- drape stiffness decreased for the treated samples. Fullness and softness of the treated samples increased and crispness decreased with the lowest level reaching after two hours of the treatment for all concentrations. Scrooping feeling of the treated samples increased and flexibility with soft feeling increased as the treating time and the concentration of cellulase increased. 3. Moisture regain of the samples decreased as the treating time and the concentration of the enzyme increased and the treated fabric showed cracks on the fiber surface, and much surface fibers on the fabric have been removed after the treatment. 4. Tensile strength of the samples decreased as the treating time and as the concentration of cellulase increased, and the copper number increased while the intrinsic viscosity decreased as the treating time increased, but cellulase concentration had a little effect.

• 한국식품영양과학회지
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• 제40권9호
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• pp.1300-1306
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• 2011

미세한 입도분포와 전분 손상도를 최소화할 수 있는 쌀가루의 제분조건을 제시하고자 쌀 침지과정에서 pectinase와 cellulase 효소를 처리한 반습식제분 쌀가루의 이화학적 특성을 조사하였다. 효소처리는 단일효소 처리(0.05%)와 두 가지 효소를 동일비율로 사용한 복합효소처리로 0.05~0.2% 농도 수준에서 사용하였다. 입도분포는 복합효소처리(pectinase 0.05%+cellulase 0.05%) E에서 $53\;{\mu}m$ 이하의 입도분포율이 48.3%로 높아 가장 미세한 쌀가루를 얻을 수 있었다. 단백질 함량은 효소처리로 감소하였으며, 복합효소 처리 E에서 6.97%로 가장 낮았다. 손상전분 함량은 효소무처리구는 18.1%로 높은 반면 효소처리 후 감소하여 복합효소처리 E는 12.1%로 가장 낮았다. 효소처리로 겉보기 아밀로즈 함량, 물결합력, 용해도 및 팽윤력이 증가하였으며, 단일효소처리보다 복합효소처리에서 그 증가폭이 컸다. SEM 미세구조관찰에서 수침 및 효소처리를 통해 쌀가루의 집합체로부터 매끈하게 떨어져나간 미세입자의 증가를 확인할 수 있었다. 복합효소처리 쌀가루의 경우 RVA 호화특성인 최고점도, 냉각 점도, breakdown 및 total setback 점도의 증가를 보였다. 이상의 결과로 쌀가루 제분의 전처리 과정으로서 단일효소처리보다는 pectinase 0.05%와 cellulase 0.05%의 복합효소처리 침지조건이 높은 미세 입도분포율과 낮은 전분손상도를 갖는 쌀가루 제조에 가장 적합함을 알 수 있었으며 이는 호화특성에도 영향을 미쳐 쌀 가공품의 품질향상에 기여할 것으로 예상된다.

• 한국의상디자인학회지
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• 제10권3호
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• pp.173-180
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• 2008

Cotton, wool, cotton/wool blended (80:20) and tencel fabrics were treated with low temperature oxygen plasma, enzymes (cellulase or protease), or oxygen plasma-enzyme and they were examined for dyeing and handling properties for environment friendly finishing. The appropriate conditions for cellulase treatment were enzyme concentration of 3g/l, pH of 5, and $60^{\circ}C$ for one hour, and for protease treatment were enzyme concentration of 4g/l, pH of 8, and $60^{\circ}C$ for one hour. The equilibrium uptake of a direct dye on cotton changed with plasma treatment and plasma-cellulase treatment, and the rate of dyeing slightly decreased. When wool was dyed with acid dye, the equilibrium dye uptake did not change with plasma, protease treatment nor plasma-protease treatment, however, the rate of dyeing had increased with plasma-protease treatment. From these results, it is assumed that plasma attacks the surface of the fiber, and enzyme mainly affects the inner part of the fiber. Plasma treatment did not affect mechanical properties related to the handling of fabrics. The handling test showed increased extension at maxmum load(EM), tensile energy(WT) with decreased tensile resilience (RT), and the fabrics became softer but resilience decreased slightly with enzyme treatment. The bending recidity(B), hysteresis of bending moment(2HB), and hysteresis of shear force at five degrees(2HG5) decreased, however, shear stiffness(G) increased. I knew the plasma pre-treatment made fabrics softer with lower koshi(stiffness). The handling of plasma pre-treated fabrics was better than that of enzyme-treated fabrics. When we pre-treated fabrics, the handling test showed decreased coefficient of friction(MIU), geometrical roughness(SMD), while the surface of fabrics became smoother and numeri increased. Even though compression resilience(RC) increased, fukurami(bulky property) and compressive elasticity, decreased due to the linearity of compression-thickness curve(LC) and compression energy(WC).

• Fibers and Polymers
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• 제7권3호
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• pp.241-244
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• 2006

In this paper, the effect of cellulase treatment was evaluated by means of phenol-sulphuric acid method. This method was performed by determining sugar liberation in the treatment bath with the amount expressed in glucose equivalent. As compared with conventional method, the measurement of amount of sugar liberated gave a more reliable and accurate result than the weight loss method. It was found that although the weight loss of cellulose became negligible when the treatment was done under agitation-free condition, the amount of sugar liberated was still readily measurable.

• KSBB Journal
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• 제14권4호
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• pp.470-475
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• 1999

Several enzyme were applied to Laubholz Bleached Kraft Pulp(LBKP) to evaluate the influence on beatability which was measured in Schopper Riegler value, and the results were compared with untreated pulp. Among the types of enzyme, cellulase was found to be the most effective. Addition of cellulase increased the beatability by 28% at optimum condition. Strength properties such as tensile strength and folding endurance also increased with enzymatic treatment by 12% and 46%, respectively. However, excessive dosage of cellulase had an adverse effect on strength properties in spite of the high beatability. Fibrillization by cellulase and destruction of fiber by excessive reaction was observed by Scanning Electron Microscopy(SEM).

• 생명과학회지
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• 제22권1호
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• pp.74-79
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• 2012

본 실험은 효소들을 이용하여 볏짚으로부터 수용성 탄수화물을 생산할 때 각 효소들의 상호작용을 탐색하기 위하여 수행되었다. 볏짚의 수준에 따른 각 효소들의 수용성 탄수화물 생산 활성을 조사한 결과, 볏짚의 수준이 높을 경우(100 g/l)에는 cellulase와 hemicellulase가 서로 유사한 활성을 나타낸 반면, 볏짚의 수준이 50 g/l로 낮아질 경우, hemicellulase의 활성은 낮아지지만 cellulase는 높은 활성으로 유지되었다. 효소반응액에 포함된 볏짚의 수준, hemicellulase 및 xylanase의 상호작용을 Box Behnken design과 반응표면모형을 이용하여 분석한 결과 hemicellulase과 xylanase 간의 상호작용이 발견되었으며, 각각의 효소들을 0.55 mg/ml와 0.65 mg/ml로 혼합하는 것이 볏짚의 수준과는 상관없이 가장 많은 수용성 탄수화물을 생산하는 결과를 나타내었다. 따라서, 결과적으로 볏짚의 효소처리를 통한 수용성 탄수화물의 생산에 있어 cellulase가 가장 큰 효과를 나타내며, hemicellulase과 xylanase는 서로 상호작용을 통하여 수용성 탄수화물 생성량을 향상시킨다는 알 수 있었다.

• Journal of the Korean Wood Science and Technology
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• 제19권1호
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• pp.14-21
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• 1991

Steam-exploded woods were delignified by two-stage with a 0.3% NaOH extraction and oxygen-alkali bleaching and were subjected to the enzymatic hydrolysis with cellulase enzyme. Also, an improved almost quantitative recycle process of cellulase enzyme was discussed. In enzyme recovery by affinity method, The first recycling showed relatively high hydrolysis rate of 96.4%. Even at the third recycle, hydrolysis rate was 87.0 percents. In the case of cellulase recovery by ultrafiltration method, first 2 recycling treatments resulted in very high hydrolysis rates, 96.8% and 95.0%, respectively. Even the third recycling showed about 93.6%. Steam-explosion treatment of oak wood followed by 2-stage delignification with alkali and oxygen-alkali produced a excellant substrate for the enzymatic hydrolysis that allowed almost quantitative recycle of cellulase.

• 한국의류학회지
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• 제21권7호
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• pp.1196-1204
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• 1997

Cotton, rayon/cotton, and Tencel twill weave fabrics were used to investigate the effect of fiber types on the cellulase washing finish. And twill. basket, and derivative weave cotton fabrics were used to study the weave effect. Various fabrics were treated with neutral cellulase varying treatment times and with acid cellulase, stone, and stone-neutral cellulase respectively for two hours in a rotary washer. Weight loss decreased in the order of rayon/cotton> cotton> Tencel, and basket and derivative weave fabrics lost more weight than twill weave fabric. Color difference decreased in the order of cotton> Tencel> rayon/cotton, and twill weave fabric had larger color difference than derivative and basket weave fabrics. Back staining decreased in the order of cotton> rayon/cotton> Tencel, and twill weave fabric had larger back staining than derivative and basket weave fabrics. Tear strength retention decreased in the order of rayon/cotton> cotton> Tencet and twill weave fabric had larger tear strength retention than derivative and basket weave fabrics. Flex stiffness retention decreased in the order of cotton> Tencel> rayon/cotton, and in the order of derivative> twill> basket weave. In cotton fibers, damage of primary wall was observed. And the cellulase treatment on Tencel seemed to roughen the fabric surface slightly, and to fibril fibers along the fiber axis.