• Textile Coloration and Finishing
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• v.21 no.2
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• pp.29-39
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• 2009

The color mixture, obtained from Indigo and Japanese pagoda tree, was applied to cellulose fibers such as cotton, linen and rayon to diversify color gamut of natural dyes. The color mixture was tried with two different methods. The first process was that cellulose fibers were dyed with $5{\sim}25%$ owf Japanese pagoda tree solution, and then dyed 1 to 4 times with Indigo. The second process was dyeing 1 to 7 times with Indigo, followed by dyeing with $5{\sim}25%$ owf Japanese pagoda tree solution. K/S value of the dyed fibers with one colorant and color mixture increased in the order of linen, cotton, rayon. It was also found that the first process could give higher K/S values than the second process.

• 한국정보디스플레이학회:학술대회논문집
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• 2009.10a
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• pp.1044-1046
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• 2009

Here we report the architecture for a non-volatile n-type memory paper field-effect transistor. The device is built using the hybrid integration of natural cellulose fibers (pine and eucalyptus fibers embedded in an ionic resin), which act simultaneously as substrate and gate dielectric, with amorphous GIZO and IZO oxides as gate and channel layers, respectively. This is complemented by the use of continuous patterned metal layers as source/drain electrodes.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2023.05a
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• pp.37-38
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• 2023

As one of the resource recovery projects, this study aims to select natural fibers and synthetic fibers that can be used for concrete mixing among waste fibers and reuse them for the base concrete mixture. Using waste fiber, we seek a solution to the problem of reduced fluidity and hardening time of fiber-reinforced concrete and find the optimal mix of the ground concrete mixed with waste fiber.

• The Research Journal of the Costume Culture
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• v.19 no.4
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• pp.863-875
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• 2011

The purpose of this study was to survey the clothing behavior, care and the fiber preferences of multi-cultural families living in Korea. The data was collected using questionnaire surveys based on pre-tests, and a main survey conducted in Seoul, Gyeonggi Province and Chungcheong Province. The 258 participants came from 151 multi-cultural families and 107 Korean families. The results of this study were as follows: First, Filipinos owned more clothes than the Chinese and bought clothes more frequently. The Filipinos spent 10,000~30,000 Korean won on all types of clothing. Each time, the Chinese spent more money when purchasing jackets. Second, when health was the greatest concern for underclothes, they chose cotton fiber as their preferred fiber. When beauty was of greatest concern for blouses they chose cotton. When beauty was of greatest concern for skirts and jackets they chose natural fibers such as silk, wool or linen. Filipinos preferred synthetic fibers because they are easy to care for, and the Chinese preferred natural fibers due to their beauty, especially for pants. Third, multi-cultural families laundered at home using only a washing machine. All fibers were laundered together into the washer without any sorting. This study can contribute to providing basic data for an understanding of the clothing behavior and laundry styles of multi-cultural families which may be useful data in the apparel market in Korea given the relative and direct changes relevant to various clothing cultures.

• Textile Coloration and Finishing
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• v.16 no.5
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• pp.19-27
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• 2004

The dyeing on cellulose fibers such as cotton and viscose viscose rayon was carried out by the use of solution extracted from natural fresh leaves of indigo plant under several dyeing conditions. The dyeing affinity of viscose rayon was higher than that of cotton. The total K/S value of dyed fabrics was considerably increased with repeated dyeings, while a dyeing time has a little influence on it. Both fibers were hardly dyed by indigo at $60^{\circ)$ and cotton was dyed better at $40^{\circ)$ than at $20^{\circ)$, but in viscose rayon, a little difference of total K/S was shown between $20^{\circ)$ and $40^{\circ)$. The color change of dyed fabric according to dyeing conditions was evaluated by the CIELAB color system. viscose rayon had a lower $b^*$ so that it looked bluer than cotton and when the celluose fibers were dyed by indigo plant at the lower temperature, the bluer it looked. By repeated dyeings the $b^*$value of dyed fabrics was much increased but the $a^*$ value was little influenced and in case of viscose rayon the change was considerable.

• Proceedings of the Korean Society For Composite Materials Conference
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• 2005.11a
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• pp.157-160
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• 2005

The surface energies and acid-base interaction between the untreated and treated Jute or Hemp fibers and different matrix compositions of polypropylene-maleic anhydride polypropylene copolymers (PP-MAPP) were investigated using dynamic contact angle measurement. The contribution of the acid-base property into the interfacial adhesion of the natural fibers/matrix systems were characterized by calculating the work adhesion coming from the acid-base interaction. On the other hand, microfailure mechanism of both single Jute and Hemp fiber bundles were investigated using the combination of single fiber tensile test and acoustic emission. Distinctly different micro failure modes of the different natural fiber/polypropylene systems wet ε observed using optical microscope and determined indirectly by AE and their FFT analysis.

• Journal of the Korean Society of Costume
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• v.21
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• pp.207-218
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• 1993

The desire of our contempories who wish to recover humanities fading away and get back recover humanities fading away and get back to the nature is emerging as a main theme of the fashion today the decade of facing 21st century. The prevalence of naturalness-ecology ru-ral peasant look-and ethnic look shows the tendency mentioned above. Kenzo Takada' works which exhibit this naturalness and ethnic look were picked and investigated. The objective of this research is to study the beauty of form and internal and investi-gate in what form the naturaless and Ethnic look in Kenzo's work. The result were as followings : <1> Draped form are mainly used as form and they are made neglecting the body line by straight-cut and provide the wearer ease and freedom of movements <2> As for the color fantastic original colors (red, blue, etc) and natural colors are used. And Strong color contrast is seen. In ethnic look original colors(red, blue, etc.) natural colors and ethnic colors are used. <3> As for the fabric Cotton neat skilk and wool etc are used mainly and use of such natural fibers represents the return to the natural well. <4> As for ornament natural things-straw hat flower feather pebble, shell-are used and exhibit natural feelings strongly. For the ethnic look ornaments representing each country's ethnic atmos-phere by hat scarf and neckcloth made of natural fibers. <5> As for naturalness Flower deer butter-fly leopard and plant etc, are used as motif. As for ethnic look flower geometric motif are used.

• Textile Coloration and Finishing
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• v.33 no.3
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• pp.131-140
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• 2021

Collagen and chitosan are used in medical and cosmetic materials as natural polymers. In order to utilize the advantages of the materials, collagen/chitosan conjugated wet-spun fibers were prepared. The analysis of surface, optical, thermal and mechanical properties was carried out on the various composition of collagen and chitosan. As a result of images analysis, it was verified that the collagen/chitosan conjugated fibers were stably spun. In addition, the optical and thermal properties of fibers were observed to be changed by hydrogen bond. As a result, an optimized composition could be found at an appropriate content. Moreover, the optimized fibers have mechanical properties similar to chitosan fibers, while improving the structural and thermal stability by its hydrogen bond. In addition, the wet-spun collagen/chitosan conjugated fibers can be applied to medical and various fields through mechanical properties according to content control.

• Journal of the Korean Society of Clothing and Textiles
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• v.37 no.4
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• pp.590-597
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• 2013

This study examined the change in the dyeability of natural dyes on cotton fabrics by a PEI (polyethyleneimine) pretreatment instead of mordants. Cotton fabrics were treated with PEI and the changes in the dyeability were shown by measuring the amount of PEI on cotton fabrics. Samples treated with PEI were dyed with two natural polychromatic dyes with a different affinity to cotton fibers: Alizarin Red S and Curcumin. The changes in dyeability by three variables (time, temperature and concentration of dyes) on cotton fabrics were analyzed by the K/S value to define optimum dyeing conditions. Subsequently, the PEI treatment improved the dyeability of cotton fabrics with both dyes of low and high affinity to cotton fibers. Thus, PEI could be a suitable heavy metal mordant replacement.

• Textile Coloration and Finishing
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• v.13 no.6
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• pp.359-366
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• 2001

In this study, wool, silk and cotton fabrics were dyed with natural dyes derived from Ginkgo biloba bark using various mordants, and their dyeabilities were discussed. Additionally the fastness to washing, perspiration, light, rubbing, and drycleaning were investigated. And the effects of bacteria reduction and UV-B protection rate were also checked. The optimum dyeing condition of the colorants extracted from the Ginkgo biloba bark was three repeated dyeing at$95^\circ{C}$ for 1 hr. by using post mordanting. Mordanting improved the fastness to washing, Perspiration and drycleaning, but the fastness to light and rubbing were not increased. The bacteria reduction rate of the wool fabric increased drastically by dyeing with extract of Ginkgo biloba bark and its effect maintained after repeated washing and drycleaning. UV-B protection rate of the natural fibers increased by dyeing with extract of Ginkgo biloba bark and the dyed wool fabric was the best of the three fabrics.