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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Textile Science and Engineering
Journal Basic Information
Journal DOI :
The Korean Fiber Society
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Volume & Issues
Volume 49, Issue 6 - Dec 2012
Volume 49, Issue 5 - Oct 2012
Volume 49, Issue 4 - Aug 2012
Volume 49, Issue 3 - Jun 2012
Volume 49, Issue 2 - Apr 2012
Volume 49, Issue 1 - Feb 2012
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Hemicellulose Removal and Crystalline Structure Transition of Flax Fiber with Alkali Treatment
Um, In Chul ; Kweon, Hae Yong ; Park, Young Hwan ;
Textile Science and Engineering, volume 49, issue 5, 2012, Pages 271~278
DOI : 10.12772/TSE.2012.49.5.271
In this study, delignified flax fiber was treated with a NaOH aqueous solution. XRD diffractometry and FTIR spectroscopy were utilized to examine the structural transition of the alkali-treated flax fibers. Also, the effect of the hemicellulose removal on the structural change of flax fibers was discussed. XRD measurement revealed that the crystallinity of cellulose I increased at low NaOH concentration (3%) due to the elimination of amorphous hemicellulose. The structural transition from cellulose I to cellulose II occurred in a NaOH concentration range of 12~15%. Considering most hemicellulose in flax fiber is removed at 12% NaOH, it can be assumed that the presence of hemicellulose in flax fiber has a role in preventing the structural change of flax cellulose. IR absorbance ratios (
) were utilized as a barometer of cellulose I crystalline exhibiting a similar result with the cellulose I crystallinity from XRD. Another absorbance ratio (
) reflected the cellulose II crystalline showing almost the same trend as cellulose II crystallinity. On the whole, the total crystallinity of flax fiber was increased at low NaOH concentration (3%) and decreased at 12% due to the reduction of cellulose I content and increased again at 15% attributed to the formation of cellulose II content.
Preparation of Poly(vinyl alcohol)/Hydroxyapatite Cryogels for the Removal of Lead Ions in Water
Park, Jae-Ha ; Min, Byung Gil ;
Textile Science and Engineering, volume 49, issue 5, 2012, Pages 279~283
DOI : 10.12772/TSE.2012.49.5.279
A new adsorbent for removing heavy metal lead ions from wastewater, poly(vinyl alcohol)/hydroxyapatite (PVA/HAp) composite cryogel, has been investigated. The PVA/HAp cryogel was prepared through a clean process by using water and freeze-thawing. The PVA/HAp cryogel is provided with interconnected macropores varying from 0.1 um to several um and well dispersed and immobilized HAp in cryogel. Continuous column tests of lead ion sorption were carried out to test the sorption ability of PVA/HAp cryogel. Moreover, it was found that the porosity of the cryogels was increased by adding water-soluble poly(vinyl pyrrolidone) (PVP) followed by its extraction after cryogellation. The maximum sorption capacity of the cryogels was 69 mg/g HAp for the cryogel having 20 wt% of HAp based on PVA. On the other hand, the maximum capacity was increased to 108 mg/g HAp when 15 wt% PVP based on PVA was added and extracted due to the increase of the effective HAp amount exposed to the aqueous lead ion.
Evaluation of Physical Properties of Prism Thin Films Using Micro-Indentation Analysis
Zo, Hye Jin ; Park, Jong S. ;
Textile Science and Engineering, volume 49, issue 5, 2012, Pages 284~289
DOI : 10.12772/TSE.2012.49.5.284
The micro-indentation analysis was employed as a measure to investigate the surface properties of prism films made of various UV-curable resins, whose measurement was compared to those of the scratch evaluation method. The anti-scratch property of prism film can be directly related to elastic recovery and indentation depth. The number of functionalities in reactive monomers is directly and inversely proportional to elastic modulus and indentation depth, respectively. The one-directional repeated-groove structure of the prism film increases the hydrophobicity, exhibiting very low moisture regain. Even such a small presence, however, significantly affects the surface properties of the prism. Consequently, the indentation depth increases, while the initial modulus decreases, leading to the severe damage of scratch resistance regarding patterned films.
Preparation of MWNTs Functionalized with Silica by Covalent Bonding and Their Application to Shear Thickening Fluids
Hwang, Hye Na ; Kim, Young Ho ;
Textile Science and Engineering, volume 49, issue 5, 2012, Pages 290~300
DOI : 10.12772/TSE.2012.49.5.290
In order to increase the dispersibility of MWNT in silica/PEG shear thickening fluid (STF), silica-coated MWNTs (Si-MWNTs) through covalent bonding were prepared and characterized. Amino group-introduced MWNT with a nitrogen atom content of 20 wt% was prepared first by reacting acid-treated MWNT and ethylene diamine, and then various amounts of silica were formed on the surface of MWNT initiated from the amino groups by using a sol-gel method. The silica formation on the MWNT surface was confirmed by FE-SEM, TEM, EA, and FTIR spectroscopy. When 3 wt% of pristine MWNT was added to the silica/PEG suspension, the shear thickening property was not observed and the MWNT was not dispersed well in the suspension. On the other hand, the suspension containing 3 wt% of Si-MWNT showed similar shear thickening behavior to that of simple silica/PEG. The critical shear-thickening point of silica/Si-MWNT suspension in PEG moved to a lower shear rate with increasing Si-MWNT content.
Half-Degumming of Raw Silk Yarns Degummed after Fixing Sericin with Formaldehyde
Park, Geon Yong ; Park, Chang Hyouck ; Jeong, Hwa Jin ; Lee, Mi Yeon ; Lee, Jung Ju ; Park, Du Keong ;
Textile Science and Engineering, volume 49, issue 5, 2012, Pages 301~306
DOI : 10.12772/TSE.2012.49.5.301
To obtain the half-degummed silk yarns of 5~10% degumming losses, raw silk yarns were degummed with alkaline detergent after fixing sericin with formaldehyde. Adding above 5 g/l acetic acid or tartaric acid in 1% and 5% formaldehyde fixing baths created a lot of sericin loss during degumming with 3 g/l alkaline detergent and 2 g/l sodium carbonate after fixing sericin due to alkaline hydrolysis of sericin cross-linkage. When sericin was degummed with 3 g/l alkaline detergent after fixing with 0.1% formaldehyde at
for 15 min, the degumming temperature necessary to obtain satisfactory half-degumming was
. Also, fixing sericin at
resulted in stronger sericin fixation than fixing at
. However, the softener of cationic surfactant added in sericin fixing baths did not prevent the attachment of degummed silk yarns. Approximately 6.5% degumming loss was obtained when sericin was degummed at
for 30 min with 3 g/l alkaline detergent after fixing with 0.1% formaldehyde at
for 15 min and 30 min, and in case of adding 2 g/l acetic acid in fixing baths the half-degummed silk yarns of about 10% degumming losses, which were severely attached to each other, were obtained.
Preparation and Characterization of PAN Based Carbon Fibers Having Zirconia Nanofibers
Yang, Jee-Woo ; Yoo, Jae Jung ; Jang, Hae Jin ; Yong, Da Kyung ; Won, Jong Sung ; Lee, Seung Goo ;
Textile Science and Engineering, volume 49, issue 5, 2012, Pages 307~313
DOI : 10.12772/TSE.2012.49.5.307
There has been steady needs for the PAN based carbon fibers, which have high thermal insulation properties and high mechanical properties. Thus, in this study, low thermal conductive PAN carbon fibers were prepared by using zirconia nanofibers, which were prepared from the electrospinning and sol-gel synthesis of zirconium oxide. Wet spun PAN fibers containing the zirconia nanofibers were stabilized and carbonized in order to prepare the composite carbon fibers. Based on the characterization results using scanning electron microscope (SEM), FT-IR, thermo-gravimetric analysis (TGA), and thermal conductivity measurement, the optimal conditions of composite carbon fibers were established. In addition, the thermal conductivity of prepared composite carbon fibers was reduced considerably by the effects of zirconia nanofiber inclusions.
Effect of Two-step CHF
Plasma Treatment for Poly(imide) and Poly(ethyleneTerephthalate) Pre-treated by O
Plasma on Surface Characteristics
Kang, In-Sook ; Rha, Jong-Joo ;
Textile Science and Engineering, volume 49, issue 5, 2012, Pages 314~323
DOI : 10.12772/TSE.2012.49.5.314
Poly(ethylene terephthalate) and poly(imide) surfaces pre-treated by
plasma were modified by two-step
plasma, and the plasma modified film surface were investigated with scanning probe microscopy, X-ray photoelectron spectroscopy, and contact-angle and surface energy to characterize the surfaces. The surface energies were calculated from measured contact angles between several solutions and film-based on geometric means and the Lewis acid-base method. The exposure of the PET and PI film surfaces pre-treated by
plasma to the two-step
plasma led to the decrease in surface roughness and increase of the contact angles of film in water and surfactant solution. Primarily because of the contribution of polar force, the surface energy and hydrophilicity of PET and PI film treated by
plasma decreased greatly. Electron spectroscopy for chemical analysis (ESCA) indicated that the
plasma treatment introduced fluorine functional groups led to a decrease of the surface energy and hydrophilicity of PET and PI film.
Synthesis and Thermal Cyclization of Aromatic Polyhydroxyamides(I) -Effect of the Benzene Ring Substitution Structure-
Jee, Min Ho ; Lee, Ju Yong ; Baik, Doo Hyun ;
Textile Science and Engineering, volume 49, issue 5, 2012, Pages 324~330
DOI : 10.12772/TSE.2012.49.5.324
We have synthesized polyhydroxyamides (PHAs), a possible precursor which could be converted to polybenzoxazole (PBO) through a thermal cyclization reaction, by low temperature solution polymerization of 3,3'
-dihydroxybenzidine with terephthaloyl chloride or isophthaloyl acid. Structural characteristics, solubility, thermal cyclization, and thermal decomposition of the PHAs were investigated by the FT-IR, DSC and TGA in order to understand the effect of chemical structure of acyl chlorides on the thermal properties of PHAs. The FT-IR study reveals that two types of PHAs can cyclize on heating and be transformed into PBOs. The meta-type PHA (m-PHA) shows better solubility in N,N-dimethylformamide and dimethyl sulfoxide than the para-type PHA (m-PHA). DSC and TGA results demonstrate that the m-PHA can cyclize at lower temperature than p-PHA, which is due to the difference in activation energy of thermal cyclization between m-PHA and p-PHA. TGA results reveal that the p-PHA has better thermal stability than m-PHA while in flame.
Thermal Properties of Poly(trimethylene terephthalate-co-trimethylene isophthalate)s
Park, Sang Wook ; Kim, Young Ho ;
Textile Science and Engineering, volume 49, issue 5, 2012, Pages 331~342
DOI : 10.12772/TSE.2012.49.5.331
Poly(trimethylene terephthalate-co-trimethylene isophthalate) [P(TT-co-TI)] copolymers with various contents of TI unit were synthesized via a two-step process of transesterification and polycondensation in a high pressure reactor in order to modify the thermal properties of PTT. Effects of TI content on the crystallization and other thermal properties were investigated by DSC, TGA, polarizing microscope, and synchrotron WAXD analysis. DSC analysis indicated that the cold crystallization temperature (
) increased and glass transition temperature (
) and melting temperature (
) decreased with increasing TI content in the copolymer. The radial growth rate of PTT spherulite formed during the decrease of melt-crystallization as TI content increases. The growth and melting of the PTT crystallite were also analyzed in-situ by synchrotron WAXD patterns. A decrease in both
during the heating process and melt-crystallization temperature (
) during the cooling process for P(TT-co-TI)s were confirmed by WAXD patterns. Although the incorporation of the non-crystallizing comonomer unit of TI into the crystalline body of PTT reduced the crystallization rate of PTT, it did not affect the spherulite formation and crystal structure of PTT. Isothermal TGA analysis revealed that the activation energy for isothermal degradation with weight loss up to 10% of P(TT-co-TI)s was 200~240 kJ/mol, depending on the weight loss and TI content in the copolymer.
Evaluation of Engineering Performance and Review of Long-Term Performance of Plasma Surface Treatment Geotextiles
Lee, Kwang Yeol ; Ko, Eun Hee ; Kim, Su Kyung ; Oh, Tae Hwan ; Han, Sung Soo ; Jeon, Han-Yong ;
Textile Science and Engineering, volume 49, issue 5, 2012, Pages 343~353
DOI : 10.12772/TSE.2012.49.5.343
Woven and nonwoven geotextiles and geotextile composites were used to examine engineering property improvement by plasma surface treatment. Hydrophobic and hydrophilic plasma treatment were applied to these geotextile samples with plasma gas, electric power, plasma treatment time and gas flow rate. It is seen that tensile strength of geotextile samples increased after plasma treatment, but chemical resistance had not significantly changed. Finally, long-term performance of plasma treated geotextiles was reviewed through application of Arrehenius equation as an accelerated analysis.
Resistance Evaluation of Geomembrane for Water Barrier Application by Puncture Strength
Jeon, Han-Yong ; Song, Jung Hoon ; Oh, Hyung Sun ; Ahn, Seung Jae ;
Textile Science and Engineering, volume 49, issue 5, 2012, Pages 354~359
DOI : 10.12772/TSE.2012.49.5.354
This study focused on the protection effect of geosynthetics installed on geomembrane to resist against puncture load. For this, a puncture unit was used and model test was conducted with various types of puncture load created by different shapes of the puncture tools. The puncture resistance of the installed geosynthetics as protective material for the geomembrane was_varied depending on the types of the geosynthetics and the puncture load. When a single cone shape of puncture tool was used, the protection effect of single cone used on all kinds of geosynthetics is lower than those of other puncture tools. Finally, geocomposite showed the best protection effect against the all puncture tools.