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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Textile Science and Engineering
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Journal DOI :
The Korean Fiber Society
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Volume & Issues
Volume 44, Issue 6 - Dec 2007
Volume 44, Issue 5 - Oct 2007
Volume 44, Issue 4 - Aug 2007
Volume 44, Issue 3 - Jun 2007
Volume 44, Issue 2 - Apr 2007
Volume 44, Issue 1 - Feb 2007
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Effect of the Polymerization Methods on the Microstructure and Thermal/mechanical Properties of PU/organoclay Nanocomposites
Shin, Na-Ri ; Kwon, Byung-Chol ; Park, Ki-Ho ; Lee, Han-Sup ;
Textile Science and Engineering, volume 44, issue 1, 2007, Pages 1~8
Two different polymerization methods were used to synthesize the PU/organoclay nanocomposite by either 'one step addition' or 'two step addition' method. In two step addition method, the modified clay was reacted with isocyanate-terminated prepolymer to anchor the polymer chains to the silicate layers before the chain extension reaction occurred. On the other hand, the modified clay and chain extender were added simultaneously in the one step addition method. The effect of polymerization method on the exfoliated/intercalated structure of silicate layers as well as on the microphase separated structure of PU matrix has been studied with FTIR, SAXS and TEM methods. The PU/organoclay nanocomposite prepared with one step addition reaction showed better exfoliated structure which is effectively retarding the micro-phase separation process of PU. However, compared with two step addition one, one step addition method was more effective to enhance the initial modulus and tensile strength of the nanocomposites. The role of modified clay for the segmental orientation process was also studied by infrared dichroism method. The orientation process was hindered by the silicate layers and its effect was more pronounced in the nanocomposite by one step addition method.
Preparation of Aromatic Polystyrene Nanoparticles Using Emulsification-Diffusion Technique: Characteristics and Release Behaviors
Lee, So-Min ; Sohn, Sung-Ok ; Kim, Yun-Mi ; Lee, Hong-Youl ; Kim, Min-Kwan ; Choi, Jin-Hyun ; Ghim, Han-Do ;
Textile Science and Engineering, volume 44, issue 1, 2007, Pages 9~15
An attempt was carried out to suggest a nano-sized agent for durable fragrant finishing of fabrics. By adopting emulsification-diffusion method, we could prepare polystyrene (PS) aromatic nanoparticles (ANP) with lavender oil (LO) in core. Effects of process parameters on mean particle sire and its distribution of PS-ANPs were also examined. With controlled preparative condition, we could obtain PS-ANPs of diameters ranging 200 to 400 nm with narrow distribution. PS-ANPs were coated with poly(vinyl alcohol) layer to restrict the diffusion of LO from PS-ANPs. Sustained release properties of PS-ANPs were also evaluated.
Morphology of Poly(p-phenylene benzobisoxazole)/Single-walled Carbon Nanotube (SWNT) Composite Fibers
Min, Byung-Gil ; Kumar, Satish ;
Textile Science and Engineering, volume 44, issue 1, 2007, Pages 16~21
Poly(p-phenylene benzobisoxazole) (PBO) was synthesized in the presence of single-walled carbon nanotubes (SWNTs) in poly(phosphoric acid) (PPA) using typical PBO polymerization conditions. PBO and PBO/SWNT composite fibers were prepared by spinning liquid crystalline solutions in PPA. The morphology and properties of PBO/SWNT composite fibers was investigated. The fibril structure was well developed in PBO/SWNT fibers as well as PBO fiber. However, the SWNT rope was not observed in the inner structure of the peeled fibers, implying that SWNT ropes are exfoliated into the individual nanotube in the solution. After tensile fracture the kink bands are observed in the composite fibers similar to PBO fibers. The observation is consistent with the insignificant effect of SWNT on the compressive strength of PBO fiber.
The Effect of PVA Fiber and Carbon Fiber Addition on the Mechanical Properties of Fiber Reinforced Cement
Kim, Min-Young ; Lee, Joon-Seok ; Jeon, Han-Yong ;
Textile Science and Engineering, volume 44, issue 1, 2007, Pages 22~27
The effect of PVA (polyvinylalcohol) fiber and carbon fiber addition on the mechanical properties of the fiber reinforced cement was studied. The experimental variations were fiber length (3, 6, 9 mm) and fiber weight fraction (0.25, 0.5, 0.75, 1.0 wt%). The compressive, tensile and flexural strength of the PFRC (PVA fiber reinforced cement) and CFRC (carbon fiber reinforced cement) tend to increase with the addition of the fiber. The compressive strength of PFRC was the highest when the length of PVA fiber was 3 mm, and that of CFRC was the highest when the length of carbon fiber was 6 mm. The tensile and flexural strength of PFRC and CFRC were increased with increase of the fiber length and fiber content.
Crystallization Behavior and Mechanical Properties of Carbon Nanotube Reinforced Poly(ethylene terephthalate)
Park, Hawe-Soo ; Kim, Jun-Young ; Kim, Seong-Hun ;
Textile Science and Engineering, volume 44, issue 1, 2007, Pages 28~37
Polymer nanocomposites based on multiwall carbon nanotube (MWCNT) and poly(ethylene terephthalate) (PET) were prepared by a melt blending process in a twin-screw extruder. The non-isothermal crystallization behavior of the PET/MWCNT nanocomposites was investigated by employing the Ozawa, the Avrami, and the combined method. The non-iso-thermal crystallization behavior of the PET/MWCNT nanocomposites significantly depends on cooling rate and MWCNT content. The incorporation of MWCNT accelerates the nucleation and crystal growth mechanisms of PET, and this effect being more appreciable at lower MWCNT content. The combined Avrami and Ozawa method was found to be more effective in describing the non-isothermal crystallization process of PET/MWCNT nanocomposites. The nucleation activity of PET/MWCNT nanocomposites was increased with the incorporation of MWCNT. The activation energy for crystallization of PET/MWCNT nanocomposites was higher than that of PET. The incorporation of MWCNT improved the thermal stability and mechanical properties of PET/MWCNT nanocomposites.
A Study on the Processing Characteristics of Artificial Suede Primary Fabrics Using Sea-island Type Microfibers
Jung, Hyun-Joo ; Chang, Sun-Ho ; Shim, Hyun-Joo ;
Textile Science and Engineering, volume 44, issue 1, 2007, Pages 38~46
For the purpose of enhancing the quality of artificial suede, a fiber web was prepared using chopped seaisland type micro fibers dispersed in the water bath. An apparatus equipped with a laser beam was developed to evaluate state of the fiber dispersion in the water. A woven scrim fabric was sandwiched between these isotropic fiber webs produced through this method and then this was interlaced by water jet punching method. To dissolve the sea part of the micro fibers, alkaline finishing was applied on this composite and then the artificial suede primary fabric was prepared. For comparison, the other artificial suede primary fabrics were prepared such as applying carding method for the preparation of fiber web and needle punching method for the interlacing. After that, alkaline treatment was done for this fabric same as the above ones. The tensile properties, tear properties, surface and cross-sectional structures of these primary fabrics were studied. The hand values of these were also compared using KES-F system. The artificial suedes made of fiber webs by wet method interlaced through spunlacing showed superior isotropicity and hand values than the fiber webs made by carding method interlaced through needle punching.
Real Time Control of pH and Dye Adsorption in Acid Dye/Nylon System(II) -Prediction of Dyeing Rate Constant and Dye Adsorption Using a Fuzzy System-
Hwang, Jee-Sang ; Cho, Hyeon-Tae ;
Textile Science and Engineering, volume 44, issue 1, 2007, Pages 47~52
A fuzzy system which can predict a dyeing rate constant and maximum adsorption in acid dye/nylon system was studied. In this system, pH control profile constant is an input variable and dyeing rate constant is an output variable and the simplified reasoning for fuzzy inference and gradient descent algorithm for optimizing the fuzzy system are used. The result showed that it is possible to predict dyeing rate constants and maximum adsorption with the online control of dyebath pH in acid dye/nylon dyeing system.
Influence of Characteristics of Textile Materials Finished with Hydrophilic and Hydrophobic Chemicals on Detergency of Particulate Soil -Surface Characteristics of Textile Materials-
Kang, In-Sook ;
Textile Science and Engineering, volume 44, issue 1, 2007, Pages 53~60
This study was preliminary part to investigate the influence of surface characteristics of tektite materials finished with hydrophilic and hydrophobic chemicals on detergency of particulate soil. The hydrophilic and hydrophobic finish for PET fabric were treated with polyester, silicone and fluorine organic compound or resin respectively. Porosity, coefficient of friction and surface roughness of fabric were measured as surface structures of textile, and water up take, water vapor transport, wettability of fabric and contact angle to determine hydrophilicity of material. The porosity of polyester fabric treated with hydrophilic and hydrophobic agent were slightly decreased with increasing concentration of chemicals regardless of chemical types. And influence of finishing concentration of chemicals on coefficient of friction and surface roughness of fabric was small. The affinity to moisture such as water up take, water vapor transport, and wettability of fabric was increased with increasing concentration of hydrophilic chemicals and decreased with decreasing concentration of hydrophobic chemicals. The contact angle of solution on treated fabric were decreased with hydrophilic treatment but increased with hydrophobic finish. The whole results of surface structures and hydrophilicity of material exhibited a similar behavior in fabric treated with hydrophilic agent, but slightly differed in fabric treated with hydrophobic agent.
Correlation Analysis of Triboelectricity between Charge Decay Time for Wool Fabrics
Kim, Joo-Yong ; Wi, Da-Youn ; Yoon, Young-Sang ;
Textile Science and Engineering, volume 44, issue 1, 2007, Pages 61~67
The electrostatic property of textile fabrics has been one of important factors determining a quality of fabrics. However, it has not been easy to evaluate since it was too sensitive to the environmental variables and the types of test methods. In this study, we designed simultaneous measurements system of tribe-electrification and charge decay with an estimate method of electrostatic property for textile fabrics. An automatic tension reliever of rubbing cloth and data acquisition system were attached to the rotary rubbing system for further detailed analysis. Through the system developed, fabric's charging and discharging phenomena and characteristics of charge decay time by the rotary rubbing were elucidated in details. It was found that wool fabrics rapidly charged with electricity at the initial stage, and immediately followed by the steady state charge.
Characterization of Non-woven Filter Structures by 3-D Simulation
Kim, Joo-Yong ; Lee, Chang-Hwan ; Wang, Xin-Peng ; Lee, Joon-Seok ;
Textile Science and Engineering, volume 44, issue 1, 2007, Pages 68~73
In this paper, we investigated the relationship of filter efficiency and pressure drop with the porosity, fiber diameter and filter thickness by 3-D simulation. It was found that filter efficiency increased when the filter porosity and fiber diameter decreasing or filter thickness increasing. The pressure drop values had a linear relationship with filter thickness, and non-linear relationship with filter porosity and fiber diameter. Compared to the actual test results by Mercury Intrusion Porosimeter, the simulation results could be used for predicting filter efficiency and pressure drop within acceptable tolerance limit.