• Title/Summary/Keyword: industrial dyes

Search Result 119, Processing Time 0.02 seconds

Alkaline Dissolution and Dyeing Properties of Sea-island Type Ultrafine Nylon Fiber (해도형 초극세 나일론 섬유의 알칼리 용출 및 염색성)

  • Lee, Hae-Jung;Lee, Hyo-Young;Park, Eun-Ji;Choi, Yeon-Ji;Kim, Sund-Dong
    • Textile Coloration and Finishing
    • /
    • v.22 no.4
    • /
    • pp.325-331
    • /
    • 2010
  • The alkaline dissolution behavior of sea-island type ultrafine nylon fiber were dependent on the concentration of NaOH and treatment time, and the most appropriate condition for alkaline dissolution was to treat with 20g/l NaOH for 30 min at $80^{\circ}C$. The dyeing properties of sea-island type ultrafine nylon fiber and regular nylon fiber were examined with 3 different types of acid dyes in this study. The dye uptakes of ultrafine nylon fiber were higher than regular nylon fiber because of large surface area per unit mass, which increased as the dye bath pH decreased. The dyeing rates on ultrafine nylon fiber were faster and dye exhaustions were higher than regular nylon fiber, however color strength and rating of wash fastness were lower. It was also found that levelling type acid dye showed fast dyeing rate on both nylon fibers than metal-complex and milling type acid dyes.

Dyeing Properties of Bacterial Cellulose Fabric using Gardenia Jasminoides, Green Tea, and Pomegranate Peel, and the Effects of Protein Pretreatment (치자, 녹차, 석류껍질을 활용한 박테리아 셀룰로오스 섬유소재의 염색성과 단백질 전처리의 영향)

  • Yerim Hwang;Hyunjin Kim;Hye Rim Kim
    • Journal of the Korean Society of Clothing and Textiles
    • /
    • v.48 no.3
    • /
    • pp.511-527
    • /
    • 2024
  • The aim of this study was to impart color to bacterial cellulose (BC) fabric using various natural plant-based dyes-namely, gardenia jasminoides, green tea, and pomegranate peel. A protein pretreatment was also applied to improve the BC fabric's dyeability and mechanical properties. The BC fabric's dyeing and mordanting conditions when using plant-based natural dyes were determined by changes in the K/S values. The dyeability of BC samples dyed with green tea or pomegranate peel improved when they were pretreated with soy protein isolate (SPI) prior to dyeing. Moreover, the SPI pretreatment was efficient in improving the BC fabric's tensile strength and flexibility. This study proposes a method for dyeing BC fabric that uses plant-based natural dyes and confirms the effects of the protein pretreatment on the fabric's dyeability and durability.

Colorimetric Sensing Behavior of Curcumin Printed on Paper and Cotton Fabric (커큐민으로 프린팅된 종이와 면직물의 유해가스에 대한 색채 감지 거동)

  • Kim, Minhee;Lee, Hoik;Park, Yoon Cheol
    • Journal of the Korean Chemical Society
    • /
    • v.65 no.4
    • /
    • pp.260-267
    • /
    • 2021
  • Increasing the needs for eco-friendly natural materials, much attention on natural dyes has been attracted. Curcumin, one of abundant natural dyes available in nature, is an eco-friendly molecule found in turmeric. In this study, the colorimetric sensing behavior characteristics of ammonia and hydrogen chloride gases was analyzed using curcumin ink-printed paper and cotton fabric by inkjet printing method. The fabricated paper and fabric were utilized as a colorimetric sensor that can track food spoilage. The color changes of the samples printed on the paper and cotton upon exposure to the toxic gases, the reversibility of the color changes, and the water resistance were investigated. Both samples showed reversible reactions with NH3 and HCl, and small amount of ammonia produced by food spoilage was successfully sensed with naked eyes, confirming its capability to warn food spoilage in our daily life.

Isolation and Charaterization of Dye-Degrading Microorganisms for Treatment of Chromaticity Contained in Industrial Dyeing Wastewater (염색공단폐수의 색도처리를 위한 염료분해 균주의 분리와 특성)

  • Kim, Jung Tae;Park, Guen Tae;Lee, Geon;Kang, Kyeong Hwan;Kim, Joong Kyun;Lee, Sang Joon
    • Journal of Environmental Science International
    • /
    • v.23 no.1
    • /
    • pp.129-142
    • /
    • 2014
  • To treat chromaticity contained in effluents of dyeing wastewater efficiently, potent dye-degrading microorganisms were isolated from influent water, aeration- tank sludge, recycle water and settling-tank sludge located in leather and dyeing treatment plant. Six potent strains were finally isolated and identified as Comamonas testosteroni, Methylobacteriaceae bacterium, Stenotrophomonas sp., Kluyveromyces fragilis, Ascomycetes sp. and Basidiomycetes sp. When Basidiomycetes sp. was inoculated into ME medium containing basal mixed-dyes, 93% of color was removed after 8 days incubation. In the same experiment, the 1:1 mixed culture of Basidiomycetes sp. and photosynthetic bacterium exhibited 88% of color removal; however, it showed better color removal for single-color dyes. The aeration-tank and settling-tank samples revealed higher color removal (95-96%) for black dyes. The settling-tank sample also revealed higher color removal on basal mixed-dyes, which resulted in 90% color removal after 6-h incubation. From the above results, it is expected to achieve a higher color removal using the mixed microorganisms that were isolated from aeration-tank and settling-tank samples.

Performance Analysis of Ink for Digital Textile Printing Using Natural Indigo (천연 인디고를 활용한 Digital Textile Printing용 잉크의 성능 분석)

  • Lee, Won Kyoung;Sung, Eun Ji;Moon, Joung Ryul;Ahn, In Yong;Yoon, Kwang Ho;Park, Yoon Cheol;Kim, Jong Hoon
    • Textile Coloration and Finishing
    • /
    • v.33 no.4
    • /
    • pp.202-209
    • /
    • 2021
  • Natural dyes are more expensive than synthetic dyes and the dyeing process, which is mainly immersion of dye, is complicated. For this reason, relatively small-scale production methods were predominant. However, awareness and interest in environmental sustainability is rising globally, and the use of synthetic dyes causes various environmental problems such as wastewater and CO2 emission, so the consumption of natural dyes is increasing. In addition, interest in digital textile printing, an eco-friendly dyeing method that can produce products of various designs and uses less water, is growing. In this study, natural indigo dye (Indigofera tinctoria) was used as a raw material for Digital Textile Printing ink, and 14C (Biocarbon) present in it was measured to confirm whether it was derived from natural ingredients. The performance was confirmed by testing the pH, viscosity, electrical conductivity, surface tension, and particle size analysis of natural indigo ink. In addition, the performance of natural indigo DTP ink and printing fabric was evaluated by inspecting the change in color fastness and corresponding index substances before and after digital printing with natural indigo DTP ink on textiles. Through this, the possibility of commercialization of DTP ink and printing fabric using natural indigo was confirmed.

Detection of Oxygen Species Generated from Ag2Se-Graphene Heterojunction Photocatalysts with Excellent Visible Light Driven Photocatalytic Performance

  • Meng, Ze-Da;Oh, Won-Chun
    • Korean Journal of Materials Research
    • /
    • v.27 no.5
    • /
    • pp.255-262
    • /
    • 2017
  • Reactive oxygen species (ROS) can be produced by interactions between sunlight and light-absorbing substances in natural water environments and can completely destroy various organic pollutants in waste water. In this study, we used graphene oxide modified $Ag_2Se$ nanoparticles to enhance photochemically generated oxygen (PGO) species activity. Surface area and pore volumes of the $Ag_2Se-graphene$ ($Ag_2Se-G$) samples showed catastrophic decrease due to deposition of $Ag_2Se$. The generation of reactive oxygen species was detected through the oxidation reaction of DPCI to DPCO. The photocurrent density and the PGO effect increase in the case of the use of modified graphene. The PGO effect of the graphene modified with $Ag_2Se$ composites increased significantly due to a synergetic effect between graphene and the $Ag_2Se$ nanoparticles. The photocatalytic activity of sample was evaluated by measuring the degradation of organic pollutants such as methylene blue (MB) and industrial dyes such as Texbrite BA-L (TBA) under visible light.

Synthesis of Blue-green Naphthoxy, Chloro Derivative Zinc-phthalocyanines with LCD Requirements

  • Kumar, Rangaraju Satish;Min, Kyeong Su;Son, Young-A
    • Textile Coloration and Finishing
    • /
    • v.30 no.3
    • /
    • pp.159-167
    • /
    • 2018
  • Here we designed and synthesized new zinc phthalocyanines and structures were fully confirmed by spectral and elemental analysis. All phthalocyanines have a very good solubility in industrial solvents like chloroform, dichloromethane, dimethyl sulfoxide, N,N-dimethyl formamide, propylene glycol monomethyl ether acetate (PGMEA), acetone, tetrahydrofuran and acetonitrile. UV-Visible absorption and transmittance in PGMEA showed that these dyes have suitable spectral properties for LCD color filters. By Triton X surfactant study, we confirmed that these dyes are not showing any aggregation in PGMEA. We dissolved the all phthalocyanines in LCD fabricating solvent (PGMEA), and all phthalocyanines showed more than 8 wt% of solubility. Finally, all of these results concluded that PCK1, PCK2 and PCK3 are fit for LCD green color filter.

Skin Absorption of Lawsone in Henna Hair Dye and the Effect of Skin Protectants (헤나염모제 사용 시 로우손의 피부흡수 특성 및 피부보호제의 효과)

  • Kim, Ju Yeon;Kim, Bae-Hwan;Kim, Seung Won
    • Journal of Korean Society of Occupational and Environmental Hygiene
    • /
    • v.31 no.2
    • /
    • pp.173-183
    • /
    • 2021
  • Objectives: This study evaluated the skin permeability of lawsone in henna hair dyes to understand the exposure characteristics of henna hair dyes in the human body. It examined the protective effects of protectants by applying protectants A, B, and C to test skin. Methods: Skin absorption tests were conducted using Franz diffusion cells according to OECD test guideline 428. After applying one kind of natural henna hair dye and chemical henna hair dye, respectively, to a standardized pig skin model, samples of receptor fluid were collected at 1h, 3h, 6h, and 24h. The skin permeation of lawsone was determined using HPLC. After the skin absorption experiment, the skin to which hair dye was applied was analyzed to determine the residual amount of lawsone in the skin. Results: The cumulative permeation of both natural and chemical henna hair dyes increased over time, and the natural henna hair dye had a flux value (t=3.194, p<.05) high both in the Kp value (t=3.207, p<.05) and the residual amount (t=22.701, p<.001). For skin treated with a protectant, the cumulative permeation of natural henna hair dye 24h control and the cumulative permeation of protectant A, B, and C increased over time. Flux and Kp values were in the order control > protectant A > protectant C > protectant B. The residual amount (F=4.469, p<.05) was in the order of protectant C > protectant A > protectant B > control. At 3h, the dye application time of natural henna hair dye, the lawsone flux value (F=4.454, p<.05) and Kp value (F=4.455, p<.05) were higher in the control group than in the protectant groups. The 24h cumulative permeation of the chemical henna hair dye increased with time in both the control and the protectant groups, and the flux and Kp values were in the order of protectant A > protectant C > protectant B > control. The residual amount (F=7.901, p<.01) was in the order of protectant B > protectant A> protectant C > control. Conclusions: Within the normal dyeing time for henna hair dye (three hours for natural henna hair dyes and 30 minutes for chemical henna hair dyes) lawsone skin penetration was not observed even when no protective agent was applied. After that time, however, evidence of skin penetration and retention of lawsone and the protective effect of protective agents were observed.

Transparent Near-infrared Absorbing Dyes and Applications (투명 근적외선 흡수 염료 및 응용 분야)

  • Hyocheol Jung;Ji-Eun Jeong;Sang-Ho Lee;Jin Chul Kim;Young Il Park
    • Applied Chemistry for Engineering
    • /
    • v.34 no.3
    • /
    • pp.207-212
    • /
    • 2023
  • Near-infrared (NIR) absorbing dyes have been applied to various applications such as optical filters, biotechnology, energy storage and conversion, coating additive, and traditionally information-storage materials. Because image sensors used in cellphones and digital cameras have sensitivity in the NIR region, the NIR cut-off filter is essential to achieving more clear images. As energy storage and conversion have been important, diverse NIR absorbing materials have been developed to extend the absorption region to the NIR region, and NIR absorbing materials-based research has proceeded to improve device performances. Adding NIR-absorbing dye with a photo-thermal effect to a self-healable coating system has been attractive for future mobility technology, and more effective self-healing properties have been reported. In this report, the chemical structures of representative NIR-absorbing dyes and state of the art research based on NIR-absorbing dyes are introduced.

The Preparation of Storage-Stable Liquid Dyes by Counter Diffusion (역확산을 이용한 액체염료의 제조)

  • Park, Jong-Sang;Lee, Chung Hak
    • Applied Chemistry for Engineering
    • /
    • v.2 no.4
    • /
    • pp.399-410
    • /
    • 1991
  • New separation process was developed for the preparation of storage-stable liquid dyes. The extent of aggregation of dye molecules was measured with respect to storage time of liquid dyes under different salt environments. Hollow-fiber membranes were modified by immobilization of inorganic crystals onto the surface of membrane. Using surface-treated membranes, counter diffusion technology was introduced to selectively remove salts from dye solution. The separation factors were 10-700, and the loss of dye molecules was less than 0.4 %. Membrane permeabilities for sodium ions($U_{M,Na}$) and dye molecules($U_{M,Dye}$) were found to be 2.75 and $0.72l/m^2/hr$, respectively, in the case of surface-treated membranes. The effects of various operating parameters on desalting efficiency were also investigated.

  • PDF