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Shi W.-Q.,Wuhan Textile University | Yi C.-H.,Wuhan Textile University | Gan H.-L.,Wuhan Textile University | Tian L.,Guangdong Junan Jeans Institute | Li Y.,Wuhan Textile University
Journal of Tianjin Polytechnic University | Year: 2012

The enzyme activity of liquid α-amylase treated by ultrasonic is discussed by using iodine and starch chromatometry. The effects of ultrasonic power, ultrasonic time, pH value of enzyme solution, standing time by ultrasonic treatment, temperature on enzyme activity of liquid α-amylase are studied, and the optimum technological conditions for liquid α-amylase are determined. Then pure cotton indigo jeans are desized under the optimum technological conditions. The results show that the proper ultrasonic treatment could enhance the enzyme activity of liquid α-amylase. The ultrasonic wave on the enzyme desizing of jeans can increase about 10.2% desizing percentage than enzyme desizing. Source


Gan H.L.,Wuhan Textile University | Tian L.,Guangdong Junan Jeans Institute | Yi C.H.,Wuhan Textile University
Advanced Materials Research | Year: 2014

The Interface of sisal fiber which was treated by using alkali, potassium permanganate, atmospheric plasma and silane reinforced polypropylene composites were investigated by single fiber pull-out testes and surface morphology were studied. The results indicated that the morphological changes observed on the sisal fiber surface were obviously evident. Untreated, permanganate and plasma treated sisal fiber reinforced PP show a stable debonding process. Silane treated sisal fiber reinforced PP show an unstable debonding process. Single fiber pull-out tests indicated that the IFSS value was in the order of FIB < FIBKMnO4 < FIBP < FIBKH-550 < FIBKH-570. As can be seen from surface morphology of pull-out fiber, a little of PP resin was adhered to the pull-out FIB, FIBKMnO4, FIBP of sisal fiber. In contrast, PP resin at the surface of pull-out fiber was flaked off and sisal fibril was drawn out from sisal fiber were observed from pull-out fibers of FIBKH-550 and FIBKH-570. © (2014) Trans Tech Publications, Switzerland. Source


Tian L.,Guangdong Junan Jeans Institute | Liu L.,Wuhan Textile University | Tang Y.-C.,Guangdong Junan Jeans Institute | Gan H.-L.,Wuhan Textile University | And 2 more authors.
Journal of Tianjin Polytechnic University | Year: 2012

Spandex denim was bleached in chlorine of different pH, and bleaching effect, elastic elongation and elastic recovery rate, IR of spandex were tested. The results show that as pH value was reduced as bleaching rate was more quick, effect was more obvious, but the bleaching effect was not uniform; elastic elongation and elastic recovery rate of spandex denim was shown a downward trend when pH of chlorine water was lower, but when pH was less than 3.98, elastic recovery rate was increased in different degree; C-C in soft segment of PU fractured by chlorine bleach, which is the cause that spandex loss elastic. And three methods which solved loss of spandex denim were investigated. Source


Yang X.-L.,Wuhan Textile University | Gan H.-L.,Wuhan Textile University | Gan H.-L.,Guangdong Junan Jeans Institute | Tian L.,Guangdong Junan Jeans Institute | And 2 more authors.
Journal of Tianjin Polytechnic University | Year: 2013

The 1, 2, 3, 4 - butane tetracarboxylic acid (BTCA) was used as cross-linking agent to treat elastic indigo dyed denim fabric in the presence of nanometer titanium dioxide(TiO2 ) as a catalyst. Instead of traditional high temperature curing method, the UV curing finishing process was used to treat the denim fabric. According to single factor test to analyze the relationship among the concentration of BTCA, the concentration of nanometer titanium dioxide (TiO2), UV irradiation time and the wrinkle recovery angle and the breaking strength of the denim fabric. The results show that the optimal process conditions were given as follows: BTCA 75 g/L, catalyst TiO 2 volume fraction 15% , UV irradiation time with 20 min. After finishing, the wrinkle performance of the denim fabric was greatly improved, what is more, this method is more environmental friendly and more energy efficient than the traditional way of finishing. Source

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