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pISSN : 1229-0033 / eISSN : 2234-036X

2020 KCI Impact Factor : 0.36
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2019, Vol.31, No.1

  • 1.

    Eco-friendly Leather Dyeing Using Biomass Wastes(Ⅲ): Imparting Functionality by Combination Dyeing with Marigold (Tagetes erecta L.) and Hinoki Cypress(Chamaecyparis obtusa) Leave Extracts

    Geonhee Lee | Younsook Shin | 2019, 31(1) | pp.1~13 | number of Cited : 3
    Abstract PDF
    In this study, eco-friendly functional leather was developed by recycling wastes such as eel skin, marigold(Tagetas erecta l.), hinoki cypress(Chamaecyparis obtusa). The hot water extracts of marigold and hinoki cypress leaves were freeze-dried at -80℃ to prepare colorant powder. The dyeing of eel leather with marigold was carried out to investigate the effects of dyeing conditions, mordanting on dye uptake, color, morphological change, and color fastness. Considering shrinkage of eel leather caused by dyeing, the optimum dyeing conditions were 60℃ of dyeing temperature and 60 min of dyeing time at 1:100 of bath ratio, and color of the dyed eel leather was Y to YR Munsell series. In order to prevent the degradation of leather from microbe, we conducted combination dyeing with marigold and hinoki cypress leave colorants. In this case, the combination dyed eel leathers showed excellent antimicrobial activity with above 99% bacterial reduction rate against S. aurieus and K. pneumoniae. It was confirmed that all of the dyed eel leathers were sufficient to meet the Korean Standard for color fastness of leather products. It can be applied practically for the development of eco-friendly functional leather by utilizing some useful active components extracted from plant resources and by recycling food wastes.
  • 2.

    A Study of Dyeing Properties of PET Fabrics under Supercritical CO2 Depending on Test Condition: by Temperature, Pressure, Leveling Time

    Hyunseuk Choi | Shin Park | Taeyoung Kim and 1other persons | 2019, 31(1) | pp.14~24 | number of Cited : 4
    Abstract PDF
    In this study, dyeability of PET fabric was investigated depending on dyeing temperature, pressure, and leveling time using laboratory scale supercritical CO2(scCO2) dyeing machine. Dyeing temperature, pressure, leveling time were varied from 100, 120, 130℃, 150, 200, 250bar, 40, 60, 80, 100min, respectively. It is proved that the higher temperature of scCO2 dyeing process, the higher K/S value and the lower L* value, which in turn means the lower amount of dyeing molecules remained after process done. Compared 200bar with 250bar of dyeing pressure, scCO2 dyeing fabrics under 250bar appeared to have a lower L* value, a higher K/S value than those from 200bar, meaning that dyeing color turns to darker with higher dyeing pressure. The experiments showed that the most ideal condition for scCO2 dyeing process is 120℃, 250bar for 60 - 100min of leveling time.
  • 3.

    The Influence of the Contact Amount of Supercritical CO2 on Dyeing Uniformity

    Shin Park | Hyunseuk Choi | Taeyoung Kim and 1other persons | 2019, 31(1) | pp.25~32 | number of Cited : 1
    Abstract PDF
    The influence of the contact amount of carbon dioxide per unit mass of dyestuff (α) on dyeing uniformity in supercritical fluid dyeing is analyzed in this study. The experiments using a 5L class Pilot Scale dyeing machine is carried out for this study purpose. For a fixed temperature and pressure, the amount of sample and the dyeing leveling time were considered as process variables. The results show that the increase in the amount of the sample causes a higher color difference than the reference sample, and it also increases the amount of residual dye. On the other hand, the color difference tended to decrease with the increase in dyeing time. Based on these results, the correlation between α value and dyeing uniformity in supercritical fluid dyeing is obtained.
  • 4.

    Preparation of Self-detoxifying Textile for Removal of Chemical Warfare Agents

    Hanil Kim | Ik-Sung Choi | Seong-Woo Park and 4other persons | 2019, 31(1) | pp.33~41 | number of Cited : 0
    Abstract PDF
    In this report, nano-sized catalysts were introduced onto fabric surface to eliminate toxic chemicals assisted by physical adsorption. For chemical removal of toxic compounds, a series of zirconium-containing catalysts were synthesized and treated on fabric to catalyze the hydrolysis and oxidation of target molecules. Antimicrobial was also introduced for the research purpose to prove the compatibility of as-synthesized catalysts with other solutions. Zirconium ligated with hydroxyl group and MOF(Metal-Organic Frameworks) were exploited as catalyst for removal of toxic compounds, while zinc complex was used for an antimicrobial to culminate in a chemical shield. Once fabrics were functionalized, fabrics were washed 2 or 5 times for a washing durability test. The amount of catalyst in textile were measured by ICP-MS and weight increasing ratio of fabrics.
  • 5.

    Effects of Solvent Treatment of Bamboo Fiber on Physical Properties of Polypropylene/Glass Fiber/Bamboo Fiber Composite

    Su Kyoung Lee | Sung Wook Lim | Hyung Shik Shin and 2other persons | 2019, 31(1) | pp.42~47 | number of Cited : 0
    Abstract PDF
    In this study, the effects of surface treatment of bamboo fiber on the physical properties of polypropylene(PP)/glass fiber(GF)/Bamboo fiber(BF) composite for engine cover were investigated. PP, GF and BF were fixed at 40%, 40% and 20% and the surface of bamboo fibers were treated to 0.5, 1.0 and 2.0% as an acid and alkali solution. PP/GF/BR composites using surface treated bamboo fibers were prepared and their tensile strength, bursting strength and impact strength were measured by universal testing machine( UTM). The composites with alkali treated bamboo fiber showed better mechanical properties than the acid treated composites. It was checked that the optimum alkali content was at 1.0% from the results of mechanical properties. The effect of surface treatment on the mechanical properties was confirmed by SEM images of fractured surface.
  • 6.

    Supercritical CO2 Dyeing and Finishing Technology - A Review

    Gyoyoung Lee | Juwon Chae | Sang Oh Lee and 2other persons | 2019, 31(1) | pp.48~64 | number of Cited : 1
    Abstract PDF
    With evolution in the production environment of the textile industry, the need for non-water-based dyeing technologies and eco-friendly process facilities in the dyeing and processing stages has increased. In recent years, supercritical fluid dyes have been developed and commercialized in Europe, centering on this demand. However, so far, such dyes have been mainly applied in the processing of PET fibers. Basic research has mainly involved investigation of dyeing by supercritical carbon dioxide or solubility of such dyes, and more in-depth research should be continuously carried out. In this review, we describe the types and characteristics of supercritical fluids that exhibit specific properties at pressures and temperatures over the critical point. In addition, the state of the art in the dyeing and processing technology using supercritical fluids and associated, processing problems, environmental regulation, and wastewater treatment issues are described in detail. We hope this review can contribute to the supercritical fluid technology being further developed as an environment friendly dyeing processing method. Furthermore, we expect that the technique can be used as a means of ensuring different, high-quality dyed products.