• Textile Coloration and Finishing
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• v.30 no.3
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• pp.208-215
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• 2018

The objective was to investigate the efficacy of Metasequoia(Metasequoia glyptostroboides) cone colorants as a new functional dye for wool fiber. Effects of dyeing conditions and mordanting on dye uptake, color change, and colorfastness were investigated for wool fiber. Compared with cotton and silk fibers, wool fiber showed better affinity for the Metasequoia cone colorants. Fe and Cu mordants improved dye uptake, and mordanting did not change the color of dyed fabric with YR Munsell color. Colorfastness to rubbing and washing was as good as grade 4, whereas lightfastness of the dyed fabrics was above grade 3. Antimicrobial activity of the colorants was very high 99.3% of reduction rate toward S. aureus. It was confirmed that Metasequoia cone colorants can be utilized as a new functional natural dye for wool fiber. In addition, considering its high antimicrobial functionality it could be applied to cosmetics and food.

• Journal of the Korean Applied Science and Technology
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• v.28 no.3
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• pp.290-298
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• 2011

Natural Omija belongs to magnoliaceae was known to possess natural odor, taste, color, and various pharmaceutical & chemical characteristics. Omija extraction was extracted using ethanol as a solvent. Omija extract showed a light red-violet color of viscous liquid state. Some conclusions from the result of characteristic experiment were obtained as follows. From the result of antimicrobial experiment, occurrence of staphylococuss aureus and aspergillus niger as microbes was decreased according to the passage of time. This phenomenon could know that Omija component is affected to antimicrobial effect. From the result of dye experiment, fiber dyeing showed with some ivory color after dyed to cotton and silk. This phenomenon could know that Omija component is affected to dyeing effect from observation of scanning electron microscope(SEM). From the result of instrument analysis, inorganic components of K(107.30ppm), Na(2.110ppm), Ca(0.935ppm), Mg(0.891ppm), Li(0.270ppm) etcs from Omija were detected with ICP/OES, and aromatic components of benzene(10.808), a-pinene(13.996), phenol(14.183), ${\beta}$-terpene(15.840), a-terpinolene(17.616) etcs from Omija were also detected with GC/MSD.

• Textile Coloration and Finishing
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• v.21 no.6
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• pp.29-38
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• 2009

Natural dyes seem to be more profitable on human and environment, and recently they could be considered as a better alternative to synthesized dyes. The aim of the current work was to investigate the dyeing property and antimicrobial activity of commercial cotton fabrics dyed with kumazasa (usually called in japan) which is known as conventional japan bamboo leaves. Actually, the dyeability and antimicrobial property of dyed fabric with natural mordant/dyeing was compared with synthetic mordant/dye process. The results of this study obtained are as follows. The apparently colour of kumazasa leaves extract dyed fabrics showed with light green or slightly yellow-green. In colorfastness to washing, ${\Delta}E$ and K/S values of dyed fabrics with natural chitosan as mordant used was shown to be more excellent results, than was synthetic mordant used. However, the decrease rate was recorded nearly 50% when washing repeated 20 cycles. In result of antimicrobial effect for bacteria, the dyed fabrics didn't show the significant antimicrobial activity to the both dyed with and without mordant. Results of this investigation considered that low-cost, natural, bio-mordant are relatively effective in natural coloration.

• Journal of the Korean Society of Clothing and Textiles
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• v.37 no.8
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• pp.1130-1138
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• 2013

We examined dyeing properties using cotton, Tencel, general nylon 66 and hollow nylon 66 treated with aqueous and ethanol extracts without mordant. The antimicrobial properties of fabrics treated with Artemisia extracts against gram positive Staphylococcus aureus (S. aureus) and gram negative Klebsiella pneumonia (K. pneumonia) were also examined. The dying solution concentrations were determined from a calibration curve of the concentration and absorbance of Artemisia extracts. FTIR spectra confirmed that antimicrobial components and colorants (such as 1,8-cineol, thujone, caffeoylquinic acid and chlorophyll) were more present in ethanol extract than in aqueous extract. Nylons had higher $a^*$ and $b^*$, and lower $L^*$ values than cellulose fabrics dyed with aqueous solutions of Artemisia extracts; however, the dyed nylon fabrics were brown. Fabrics dyed with ethanol-extract added solutions were greener and had higher antimicrobial properties than those dyed with aqueous solutions; however, they faded and lost their antimicrobial properties after laundering. Fabrics regained their antimicrobial properties (especially against S. aureus) by the spraying of Artemisia ethanol extract; therefore, the application of Artemisia ethanol extract onto underwear is expected to relieve atopic dermatitis.

• Fashion & Textile Research Journal
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• v.12 no.6
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• pp.837-842
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• 2010

This study examines the dyeability, light fastness, washing fastness, and antibacterial activity of chitosan and nano silver composite knit fabrics dyed with extracted solution from Chrysanthemum Indicum Linn. The results show that ${\Delta}E$ values of chitosan and nano silver composite knit fabrics were higher than cotton 100% knit fabrics in dyed condition with extracted solution from Chrysanthemum Indicum Linn, and mordant treatments influenced the chrominance change. Chrysanthemum indicum Linn confirmed that this could be a polygenetic colors. ${\Delta}E$ values of post-mordant treatments knit fabrics were higher than pre-mordant treatments knit fabrics in dyed condition with extracted solution from Chrysanthemum Indicum Linn., and mordant treatments method influenced the chrominance change. The dyeability of chitosan and nano silver composite knit fabrics was increased by mordant treatment. The fastness of the chitosan and nano silver composite knit fabrics was better than cotton 100% knit fabrics. In the result of antibacterial activity, the bacterial reduction rate of chitosan and nano silver composite knit fabrics was 99.9% to Staphylococcus aureus and Klebsiella pneumoniae.

• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2011.03a
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• pp.107-107
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• 2011

최근 IT(Information Technology)가 결합된 스마트 섬유의 수요가 꾸준히 증가하고 있다. 생활수준 향상에 따른 유저들의 청결, 쾌적에 대한 높은 관심속에서 생활 및 의료용 섬유에도 다양한 기능성이 요구되어지고 있다. 초경량, 흡한속건, 투습방수 등 레저 스포츠, 아웃도어 활동에 필요한 고기능성 소재는 제품의 고부가가치를 더하는 가치 상승 요인이긴 하지만 그 기술과 적용성이 이미 포화 상태에 도달했다고 볼 수 있다. 이에 국내 외 섬유 업체들은 스마트 섬유 열풍을 큰 기회로 삼아 헬스케어 기능, 엔터테인먼트 기능 등의 최첨단 기술과 결합되어진 특화된 섬유시장을 통해 더 높은 부가가치를 창출하고 새로운 섬유시장의 도약을 노리고 있다. 이에 본 연구에서는 위치추적이나 동선, 생체적 리듬 등을 파악할 수 있는 스마트 섬유용 전도성 섬유센서의 초기특성(전기적, 물리적 물성)을 유지함과 동시에 심미적인 효과와 새로운 기능성을 부여하기 위하여 전도성 센서소재의 최적 선염공정을 조사하고 외부적인 환경변화를 염두에 두어 그 물성 변화를 측정하였다.

• Textile Coloration and Finishing
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• v.3 no.3
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• pp.15-22
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• 1991

The effects of electrolytes on color fastness properties of cotton fabric with Congo Red have been studied at $90^{\circ}C$. Each dyeing carried with $10 \times 10^{-6}M$ of Congo Red and with various concentration of electrolytes. The results obtained from this study were as follow 1. In the case of none, the fastness to washing became worse, but the fastness to light better with increasing dye concentration. 2. In the case of additing an electrolyte, the fastness to washing became worse and the fastness to light better than the case of none. The samples had become yellower after washing test. Yellowness had been reduced after fade-O-meter test. 3. What kind of electrolytes could not have any effect on the fastness to washing, but they influenced the fastness to light in the order of LiCl

• Fashion & Textile Research Journal
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• v.11 no.2
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• pp.337-343
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• 2009

This study systematically investigated a method for extraction of safflower (Carthamus tinctorius Linnaeus) colorants by ultrasonic treatment. Compared to pigments productivity and cell wall structures of safflower after general and ultrasonic method, the ultrasonic method showed high extraction efficiency of safflower pigments due to destruction of safflower cell wall caused by high vibration energies. Microscopic analysis confirmed the hypothesis that the ultrasonic treatment of safflower caused its cell wall structure loosened and made efficient extraction of safflower pigments. And also, LC-MS/MS analysis revealed that productivities of the yellow and red safflower pigments by ultrasonic method were 21.9% and 14.6% higher, respectively, than those of pigments extracted by general method. The ultrasonic extracted yellow and red colorants could be used to dye not only natural fibers like cotton, silk and wool, but also synthetic fiber like nylon, and generally gave a better color tone than the general extracted colorants from safflower due to the affinities of red and yellow colorant on different fibers. As the yellow and red colorant were extracted by ultrasonic treatment in water, the K/S value on of 550/440nm of cotton and rayon was increased but in the case of silk and wool the change of this value was almost not detected. Finally, this technique might provide a solution to establish reproducibility and standardization for the extraction and dyeing methods on fabrics.

• Journal of Fashion Business
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• v.20 no.4
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• pp.128-140
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• 2016

In this study, dyeability of Urtica Dioica L. extract, which is relatively less studied, was measured. The extract of this plant was used to dye cellulose and protein fiber to check its usage as a natural green dye. Three different methods were used to produce extract. Dried Urtica Dioica L. was extracted with 100% ethanol, 50% ethanol with 50% distilled water and 100% distilled water. Then dyeing solution was obtained by blending with distilled water at 1-to-1 ratio. The maximum dyeability was obtained when 100% ethanol extract of dried Urtica Dioica L. used to dye fabrics at 60 degrees celsius for 60 minutes without mordant treatment. Cotton, rayon, wool and silk were dyed and dyeability for each fiber was measured for color difference value then compared to its control. The results show that dyeability of rayon and dyeability of wool are stronger, and that when color position for each mordant is measured, color difference is most diverse on cotton with pre-mordant treatment. Color fastness to wash, perspiration and rubbing crockmeter were superb, but color fastness to light was low, therefore, additional study on this is needed to improve. Urtica Dioica L. is now expected to be used practically as green color dye as well as medicinally and edible.

• Journal of the Korean Society of Clothing and Textiles
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• v.42 no.6
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• pp.1016-1024
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• 2018

Lifestyle of Health and Sustainability (LOHAS) influences the development of hygienic and health-oriented functional textile products; consequently, there has been an increase in the prospects for environmentally friendly natural dyeing products with functional and sensitive characteristics. Therefore, the present study expresses a functional manifestation on fabrics by treatment with chitosan and tannin using natural Coptidis Rhizoma. Cotton and wool fabrics dyed with Coptidis Rhizoma after treatment with chitosan and tannin. Consequently, the antibiosis of fabric dyed with Coptidis Rhizoma was excellent with 99.9% bacterial reduction for Staphylococcus aureus and Klebsiella pneumoniae in both fabrics. The deodorization rate was more than 90.0% in both fabrics after 120 minutes. The UV-A protection rate was 88.2% and the UV-B protection rate was 87.7% for cotton. The UV-A protection rate was 88.2% and the UV-B protection rate was 84.3% for wool fabric. Therefore, both of the dyed fabrics showed excellent UV protection by treatment with only chitosan and tannin, without mordants. Therefore, chitosan and tannin treatments were able to manifest functionalities in the fabrics dyed with Coptidis Rhizoma.