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

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2016, Vol.28, No.2

  • 1.

    Synthesis and Properties of New Phthaloperinone Dyes containing Anthraquinone Moiety

    JUN, KUN | KIM SUNG HOON | Gwon Seon-yeong and 1other persons | 2016, 28(2) | pp.57~62 | number of Cited : 0
    Abstract PDF
    We have synthesized five novel phthaloperinone dyes via a condensation reaction to be applied as yellow colorants for liquid crystal display(LCD) color filters. The reaction between 1,8-naphthalic anhydride(1a), 4-chloro-1,8-naphthalic anhydride(1b), 4-bromo-1,8-naphthalic anhydride(1c), 3-nitro-1,8-naphthalic anhydride(1d), 4-nitro- 1,8-naphthalic anhydride(1e) and 1,2-diaminoanthraquinone(2) proceeded readily giving a product in 72-88% yields. The synthesized dyes were characterized by Uv-Vis, mass spectrometry and elemental analysis. The spectral properties and thermal stability of the dyes were examined. The dyes absorb at around 400-450nm. All five dyes showed satisfactory thermal stability: the dyes retain 99-100% of its original weight at 300℃, 98- 100% at 350℃, 92-98% at 400℃, and 84-92% at 450℃. We have quantitatively evaluated the reaction mechanism and reactivity of dye molecules by means of Pariser- Parr-Pople Molecular Orbital Method(PPP-MO).
  • 2.

    Surface Photooxidation of Poly(butylene terephthalate) Films by UV/Ozone Irradiation

    주진우 | Jinho Jang | 2016, 28(2) | pp.63~69 | number of Cited : 1
    Abstract PDF
    Poly(butylene terephthalate)(PBT) surface was modified by UV/ozone irradiation and the effect of UV energy on the surface properties of the irradiated PBT films were characterized by the reflectance, surface roughness, contact angles, ESCA, and ATR analyses of the film surface. The surface reflectance, at the short wavelength of visible spectrum of particularly 400nm, decreased with increasing UV energy. And the irradiation roughened the film surface uniformly in the nano scale. The maximum surface roughness increased from 110nm for the unirradiated sample to 303nm at the UV energy of 10.6J/cm². The surface energy of PBT film increased from 50.5mJ/m² for the unirradiated PBT to 58.8mJ/m² at the irradiation of 21.2J/cm². The improvement in hydrophilicity was caused by the introduction of polar groups containing oxygens such as C-O and C=O bonds resulting in higher O1s/C1s. The increased dyeability of the modified film to cationic dyes may be resulted from the photochemically introduced anionic and dipolar dyeing sites on the PBT films surfaces.
  • 3.

    Attachment of Silver Nanoparticles to the Wool Fiber Using Glycidyltrimethylammonium Chloride(GTAC)

    이승영 | Jaewoong Lee | In Hwan Sul | 2016, 28(2) | pp.70~76 | number of Cited : 1
    Abstract PDF
    Silver nanoparticles(AgNPs) were attached to wool fibers using glycidyltrimethylammonium chloride(GTAC), which is a type of quaternary ammonium salt. GTAC, which contains an epoxy functional group that, under high temperatures, generates a ring-opening reaction with wool fibers, which contain the amine group. Then, the AgNPs are attached to the surface of the GTAC-treated wool fibers by treatment with a silver colloidal solution. The process involves the following procedures: (1) The wool fibers are immersed in the GTAC solution, followed by pre-drying at 80°C and curing at 180°C to induce an alteration in the chemical structure; and (2) the wool fibers treated with GTAC are immersed in the silver colloid at 40°C for 120 min to chemically induce a strong attachment of the AgNPs to the wool fibers. Scanning electron microscopy was used to analyze the influence of the concentrations of GTAC and the silver colloid, as well as the influence of the applied temperature of the silver colloid on the wool fibers, and the influence of the morphological changes in the wool fiber surfaces. As a result, the enhanced concentrations of GTAC and the silver colloid together with an elevated applied temperature of silver colloid have a tendency to increase in Ag atomic%.
  • 4.

    Physical Properties and Dyeability of Wool/Polyester Spun Blend Yarn and Its Fabrics Using Air Blowing and Electrostatic Spinning Technology(Cyclone)

    김미경 | 김동권 | 정재석 and 1other persons | 2016, 28(2) | pp.77~91 | number of Cited : 1
    Abstract PDF
    Recently, the spun blend yarns with staple fibers and filaments are being developed in the spinning process using an air blowing and electrostatic spinning technology( cyclone) in order to enhance the soft feeling and the fine count spun blend yarn manufacturing competitiveness. In this study, the appropriate separation condition of polyester multifilament was examined according to the treatment condition of conductive agents and voltage on polyester multifilament in the newly developed cyclone spinning process. And it was investigated the physical properties and dyeability of the cyclone wool/polyester spun blend yarns and its wool composite fabrics in comparison with existing sirofil wool/polyester spun blend yarn and its fabrics. As the result, it is determined that the newly developed cyclone wool/polyester spun blend yarn applied fabrics has a superior quality level in terms of practicality.
  • 5.

    Effect of Coated Polypyrrole Content on the Properties of Polypyrrole Coated Fabrics

    손성호 | Han-Do Kim | Young-Hee Lee and 2other persons | 2016, 28(2) | pp.92~100 | number of Cited : 0
    Abstract PDF
    To chemically prepare polypyrrole(pPy) coated fabrics(silk, cotton and nylon fabrics), the fabrics were first soaked in 0.4M oxidant FeCl3/0.06M dopant anthraquinone- 2-sulfonic acid solution for 5min at room temperature, and subsequently soaked in a 0.4M monomer pyrrole aqueous solution for 5min at room temperature. The content(wt%) of coated pPy in the coated fabrics was controlled by the number of treatments(these two steps). This study examined the effect of the number of treatments/pPy content on the sheet resistance, mechanical/bending properties and color behaviors of pPy coated fabrics. The coated pPy content, sheet resistance(Ω/square) and color strength(K/S) of pPy coated fabrics increased sharply with increasing number of treatments up to 20 times, while the increase slowed down afterward. The tensile strength, elongation at break and lightness(L*) decreased with increasing number of treatments. The tensile modulus and bending rigidity of coated fabrics increased significantly with increasing number of treatments/ coated pPy content. This indicated that the flexibility of coated fabrics decreased considerably.
  • 6.

    Characteristics Analysis of Nano-composites Films Using Extruder

    권일준 | Jeong Hyun Yeum | 박성민 and 1other persons | 2016, 28(2) | pp.101~108 | number of Cited : 0
    Abstract PDF
    Polypropylene(PP)/multiwalled carbon nanotubes(MWCNT) nanocomposites films and PP/poly(vinyl alcohol)/CNT nanocomposites films were prepared through melt mixing method by the extruder. The PP/CNT nanocomposites films, which contain CNT of a variable content, were prepared for the first time and research on a appropriate content of the CNT on the PP/CNT nanocomposites films was conducted. The effects of take-up speed of the extruder on the mechanical and chemical properties of the PP/CNT and PP/PVA/CNT nanocomposties film were studied. Field emission scanning electron microscope( FE-SEM) was used to examine the surface morphology and the DSC measurement and tensile test were conducted. It was found that the properties decreased when takeup speed was increased.
  • 7.

    Mechanical Properties of Synthetic Fabrics Dyed with Persimmon juice

    Bae Jung Sook | Manwoo Huh | 2016, 28(2) | pp.109~117 | number of Cited : 2
    Abstract PDF
    Synthetic fabrics, such as nylon and polyester, were dyed with persimmon juice by using a padding mangle repeatedly. The mechanical properties of these synthetic fabrics were analyzed using the Kawabata evaluation system. The following findings were obtained from this investigation. As the number of repetitions of padding dyeing increased, the tensile energy per unit area and the tensile resilience of synthetic fabric remained almost unchanged, whereas the linearity of the load-extension curve of the synthetic fabrics increased. As the number of padding repetitions increased, the synthetic fabrics dyed with persimmon juice exhibited increases in thickness and weight. As the number of repetitions of padding treatment with persimmon juice increased, the values of stiffness, anti-drape stiffness, fullness, and softness also increased, whereas the flexibility with soft feeling, crispness, and scrooping sensation significantly decreased. The amount of coated persimmon juice on the surface of the fabrics increased after three repetitions of padding treatment with persimmon juice. Nylon and polyester fabrics were dyed evenly with persimmon juice treated using a padding mangle.
  • 8.

    The Characteristic of Natural Dyeing with Mulberry Leaf and Coffee Powder using Zinc Mordant

    이종관 | 고재훈 | 2016, 28(2) | pp.118~123 | number of Cited : 3
    Abstract PDF
    The use of natural organic dyes obtained from renewable resources such as plants and trees has the potential for not only preserving petrochemicals but also all-endangered environment for coming next generations. In spite of inferior fastness, natural dyes can be employed in the colouration of natural as well as synthetic fibers. Recently, the potentiality of using natural dyes in colouration with additional UV-protection and antimicrobial properties has been reported. This study is aimed to investigate the effect of Zinc compounds compared to another metallic compounds as mordants on the dyeing properties of natural dye extracted from mulberry leaves and coffee. In this study, the results showed Zinc compounds was expose that is more similar than other mordants in washing fastness through a repeated experiment. Also, Zinc is the environmental impact is less material compared with other mordants, essential edibility minerals ingredient that is necessary in human body.