• 한국염색가공학회지
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• 제15권4호
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• pp.43-50
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• 2003

N-methylmorpholine-N-oxide(NMMO) is recently hewn as a solvent dissolving cellulose to produce a new regenerated cellulosic fiber, lyocell. In this study, four kinds of cellulosic fibers (lyocell, regular cotton, treated cotton with 50% and 75% NMMO aqueous solution) was examined and compared in terms of mechanical properties and dyeability. The swelling of cotton treated with NMMO aqueous solution is higher than that of cotton treated with water. In dyeing rate, the cotton treated with NMMO was faster than regular cotton. NMMO treatment decreased the crystallinity of cotton fabrics and improved their softness and smoothness.

• 한국추진공학회지
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• 제23권6호
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• pp.21-27
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• 2019

우주 항공용 노즐에 사용되는 셀룰로오스계 탄소 직물은 낮은 열전도도, 높은 내삭마 특성을 가지고 있다. 그러나 내염화 및 흑연화 공정에서 70~90% 중량이 감소하여 최종 탄소 직물 제조 시 수율이 낮은 단점이 있다. 본 연구에서는 리오셀 직물에 인계난연제로 인산(Phosphoric acid), 가교제로 시트르산(Citric acid)을 사용하여 전처리한 후 FT-IR, XRD, TGA 분석을 통하여 화학적 구조 및 열적 특성 변화를 확인하였다. 또한 리오셀 직물의 내염화 및 흑연화 후 중량을 측정하여 시트르산이리오셀 직물 수율 변화에 미치는 영향에 대하여 확인하였으며, 16 wt% 첨가 시 흑연화 수율이 8.1% 까지 증가하는 것을 확인하였다.

• 복식문화연구
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• 제24권6호
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• pp.777-787
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• 2016

This study was carried out in order to provide useful data for planning fabrics of summer eco-friendly fashion products. The fabrics used in this study were four cellulose fibers: cotton, cotton/mulberry blended, flax, and flax/lyocell blended. Dyeing with natural indigo was carried out under three different reducing conditions (i.e., general, eclectic, and eco-friendly) that have different reducing agent and pH levels, and hydrosulfite and glucose were used as a reducing agent. The dye uptake (K/S value) of fabrics dyed with natural indigo by a reducing condition was the highest at 660nm. Regardless of the fabrics, dye uptake was the highest under the general reducing condition and the lowest under the eco-friendly reducing condition. Under different reducing conditions, the dye uptake of natural indigo fabrics with the maximum absorption wavelength indicated a difference. The colorfastness of cellulose fabrics that were dyed with natural indigo had a rate of 4 to 5 except for rubbing fastness, which indicated good colorfastness. Additionally, natural indigo-dyed cotton and flax fabrics had good antibiosis. When the color characteristics of fabrics dyed with natural indigo were measured, all of the three reducing conditions created purple blue (PB) colors, and the color characteristics of dyed fabrics by reducing condition and fabric showed significant differences.

• Fibers and Polymers
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• 제6권1호
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• pp.28-34
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• 2005

The purpose of the research was to examine the effect of three different levels of enzyme treatment on the physical characteristics and the end-use suitability of the lyocell fabrics made with four different types of commercial wood pulp. The appropriate enzyme concentration for obtaining an optimum as well as consistent physical characteristics and fabric hand trait was 3 g/l for the concentration levels tested in the present investigation. Weight loss was more affected by higher enzyme con­centration than other physical properties. H2 was least affected by enzyme treatment for all three physical properties and fab­ric hand. 5 g/l concentration exhibited little difference from 3 g/l in the physical characteristics, whereas the KES-FB values indicated a significant loss of fabric hand in most PHV s with the 5 g/l concentration level. Among different garment parame­ters, all four fabric types were relatively inappropriate for the men's slacks (MS) fabric due to the lower hand value of koshi required by the MS parameter. However, despite the relatively low koshi values, high fukurami values required for men's dress shirt (MWDS) resulted in the highest THV among the four garment parmeters. The four fabric types, which represent the usage of four different wood pulps, in general seem to exhibit a higher applicability to women's winter thin dress (WWTD) than women's winter suit (WWS) garment parameter.

• 한국염색가공학회지
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• 제15권5호
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• pp.333-339
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• 2003

The cotton fabrics treated with 50% N-methylmorpholine-N-oxide(50% NMMO) and 75% N-methylmorpholine-N-oxide(75 % NMMO) aqueous solution were examined in terms of the dyeability comparing with those of regular cotton fabrics. The dyeing rate was increased with the increase of the concentration of NMMO in the treatment aqueous solution. The NMMO treatment increased the diffusion coefficients and decreased the activation energy of direct dye onto cotton fabrics. This means that the NMMO could change the micro-structure of cotton fabrics.

• 공업화학
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• 제25권4호
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• pp.418-424
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• 2014

본 연구에서는 NaCl/$H_3PO_4$ 혼합수용액을 사용하여 라이오셀 섬유의 내염화 처리를 수행하고 이에 따른 열 안정성과 내산화성의 향상 효과를 고찰하였다. 라이오셀 섬유를 다양한 공정조건으로 내염화 처리한 후 열 안정성과 내산화성을 측정 및 분석하고 그에 따른 메커니즘을 제시하였다. 실험결과, 내염화 처리된 라이오셀 섬유의 적분 열분해 온도(integral procedural decomposition temperature, IPDT)와 한계산소지수(limited oxygen index, LOI)는 약 23, 30% 증가하였으며, 활성화 에너지(activation energy, $E_a$) 값은 약 24% 향상된 것을 알 수 있었다. 이러한 결과는 $H_3PO_4$와 NaCl가 연소시 에스테르화 반응, 탈수소화 반응 및 C-C결합의 분해반응으로 char 형성을 촉진하고 섬유 표면에 형성된 탄소 층을 형성함으로써, 고분자 수지 내부로 산소와 열 공급을 물리적으로 차단하여 열 안정성과 내산화성이 향상된 것으로 판단된다. 이러한 결과를 바탕으로, NaCl/$H_3PO_4$ 혼합수용액을 이용한 내염화 처리 공정의 최적화된 인자 및 메커니즘을 제시하였고 열 안정성과 내산화성이 향상된 라이오셀을 성공적으로 제조하였다.

• 한국화재소방학회논문지
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• 제29권2호
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• pp.25-32
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• 2015

라이오셀 섬유의 열 안정성과 내산화성을 향상시키기 위하여 $Na_3PO_4$ 수용액으로 내염화 처리를 실시하였다. 다양한 공정조건으로 라이오셀 섬유를 내염화 처리한 후 열 안정성과 내산화성을 측정 및 분석하고 그에 따른 메커니즘을 고찰하였다. 내염화 처리된 라이오셀 섬유의 적분 열분해 온도(integral procedural decomposition temperature, IPDT)와 활성화 에너지(activation energy, $E_a$)값은 각각 약 30, 160%로 향상된 것을 알 수 있었다. 이는 $Na_3PO_4$가 연소 시 에스테르화 반응, 탈수소화 반응 및 C-C 결합의 분해반응으로 char 형성을 촉진하여 섬유 표면에 보호층을 형성하여, 고분자 수지 내부로 산소와 열 공급을 물리적으로 차단하여 열 안정성과 내산화성이 향상된 것으로 판단된다. 이러한 결과를 바탕으로, $Na_3PO_4$ 수용액을 이용하여 열 안정성과 내산화성이 향상된 라이오셀을 제조하였고, 내염화 처리공정의 최적화된 인자 및 메커니즘을 고찰하였다.

• 복식문화연구
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• 제19권5호
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• pp.1061-1074
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• 2011

This study was conducted based on a comparative analysis of design-specific features prevalent in the Women's Wear Collection S/S 2011. As the method of this study, the denim styles were classified by various fashion design factors consisting of silhouette, fit, color, and textile fabric, which were extracted from an image database. The properties of denim fabrics associated with each fashion image were investigated to inform fabric development and washing. The results of the study show that the dense and glossy surface of the denim fabric represent a modern trend, which can be achieved by blending lyocell, tencel and rayon or by using different textiles, such as lightweight plain weave and satin instead of twill. For casual look, various washing effects were utilized jean's casual feeling like freedom and activities, while in a modern image, washing effects was restricted. And a glossy textile offers a simple modern look. The Modern image represents a simple H-silhouette and wide or straight fit in bottoms as well. Brightness can be adjusted by washing-induced bleaching. High brightness gives an elegant image, while low brightness makes a casual image. The purpose of this study is to configure a database for the development of design in the growing women's casual wear market. In addition, This study, in which the elements for specific fashion image-making were analyzed, can be used as a reference for developing denim style and fabric.