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면포의 효소감량에서의 수산화나트륨, 액체암모니아 전처리의 영향과 역학적 성질에 미치는효과
이문철,김호정,脇田登美司 釜山大學校生産技術硏究所 1998 生産技術硏究所論文集 Vol.54 No.-
면포의 액체암모니아(NH₃) 전처리가 유연한 태의 향상에 유효하다는 것은 잘 알려져 있다. 전보에서 NH₃처리에 의한 현저한 결정화도의 저하에도 불구하고 염색성은 그다지 변하지 않았으나, 수산화나트륨(NaOH) 처리는 NH₃처리에 비해 결정화도의 저하는 작지만 염색성은 현저히 증대함을 보고하였다. 본 연구에서는 NaOH, NH₃ 및 효소(셀룰라아제) 처리한 면포의 역학적 성질을 KES 시험기에 의한 전단, 골곡히스테레시스 곡선으로부터 고찰하였다. NaOH, NH₃, NaOH/NH₃ 및 셀룰라아제 처리한 면직물의 G 및 2HG는 NaOH 처리에 의해 현저히 증대하지만 NH₃나 NaOH/NH₃처리포는 원포보다 현저히 저하하였다. 또한 NH₃전처리후 셀룰라아제로 처리한 면포는 한층 G 및 2HG가 저하하여, 이들 복합처리가 태의 유연성에 극히 유효하다는 것을 알았다. It is well known that liquid ammonia and cellulase treatments are effective to improve the soft hand of cotton fabric. In this study, cotton broad cloth was treated with liquid ammonia, sodium hydroxide/liquid ammonia and subsequently with cellulase. Shearing and bending hysteresis curves were measured using a KES instrument. The shearing G and bending modulus B and the hysteresis widths 2HG and 2HB were calculated on the basis of the curves. G and B or 2HG and 2HB decreased by the the NH₃treatment, especially with NaOH/NH₃Although cellulase treatment alone decreased the parameters and led to the soft hand, combinational treatment with NH₃and cellulase was muchmore effective to improve the soft hand.
천연염료로 염색한 양모, 나일론 6, 견직물의 Sputter Etching에 의한 색채변화
조성미,최석철,협전등미사 한국섬유공학회 1998 한국섬유공학회지 Vol.35 No.4
Generally, natural dyes have moderate colors and are environmentally friendly, but harmful mordants must be used for fixing them and obtaining a full color range on fabric, and it is very hard to improve K/S values of the dyeing, though we have tried repeated dyeings and mordanting. In this study, to give deep and strong colors on natural dyed fabrics, wool, silk and nylon 6 fabrics were dyed with several natural dyes, cochineal, curcuma longa L. and logwood, and then, they were treated by sputter etching. The apparent color depth (K/S) value of dyed fabrics was considerably increased with sputter etching time. SEM photographs showed that innumerable fine microcraters were shown on the fiber surface of wool, silk and nylon 6 fabrics by means of sputter etching treatment. This surface irregularity caused by sputter etching decreases the amount of light reflected, increasing the depth of shade considerably. The color change effect of sputter etching treatment on the dyed fabrics was evaluated by the CIELAB color system. ${\Delta}E^*$(color difference) was remarkably increased, while h (metric hue angle) was little influenced by sputter etching. Changes in $L^*$ (metric lightness) and $C^*$ (metric chroma) of dyed fabrics with various sputter etching time were different in accordance with the types of each natural dyes and mordants. Much importance should be given to the fact that $L^*$ for cochineal and logwood dyed was decreased, but $C^*$ for all three natural dyes was increased. Thus, sputter etching treatment is the very effective method to produce more vivid colors on dyed fabrics.
박병기,이방원,김환철,김학용,협전등미사 한국섬유공학회 1998 한국섬유공학회지 Vol.35 No.8
Polyester fabrics were treated with chitosan of various molecular weights and crosslinking agents by the pad-dry-cure method. Chitosan solutions were prepared using acetic acid as a solvent, and the concentration of solution were in the range of 0.l~l%. The properties of the fabrics treated with the chitosan solution, including tensile strength, drape stiffness, reduction rate, and half life, were measured. The strength of the polyester fabrics was observed to decrease greatly by the alkali-treatment, but was recovered by the chitosan treatments. One of the properties obtained with the chitosan treatment was the remarkable antistaticity.