• 한국염색가공학회지
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• 제22권3호
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• pp.246-256
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• 2010

This study studies on the physical property of MWNT/PU composite film for electrostatic dissipation (ESD) function by dispersing multi-wall carbon nanotubes (MWNT) in dimethylformamide (DMF) and by combining it with polyurethane(PU). For this purpose, four kinds of MWNT were selected and the composite films were made by dispersion processing, and their physical properties were measured and investigated in terms of electrical conductivity. For dispersion parameters, four MWNT contents(0.5, 1, 2, 5wt%) and two dispersion times(30min, 120min) were selected. The dispersion property and the electrical conductivity of MWNT/PU film was measured using a UV-Vis spectrometer and conductivity measuring apparatus. Finally, their physical properties according to the dispersion conditions were analyzed and discussed with various processing conditions.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 1996년도 가을 학술발표회 논문집
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• pp.115-122
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• 1996

• 지질공학
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• 제9권3호
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• pp.253-265
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• 1999

충청북도 제천 지역에 있는 갑산층 퇴적암을 대상으로 지구물리검층과 실내 코어물성 측정에 의한 물성 반응 특성을 연구하였다. 자연감마와 전기비저항 및 밀도를 대상으로 하여 지구물리검층과 실내 코어물성 사이에 나타나는 유사성과 차이점을 비교하는데 초점이 모아졌으며 특히 물리검층과 실내 코어물성 사이에 나타나는 차이점 분석 과정을 통하여 검층밀도 결정에 있어서 자연감마의 영향을 분석하였다. 자연감마의 영향 보정에 의하여 두 물성간의 상관성이 개선되고 검층해석 결과에서 신뢰도가 크게 향상되었다. 물성 값중에서는 갑산층 셰일의 밀도가 주변의 치밀질 석회암보다도 높게 나타나고 있음이 주목되었다.

• 패션비즈니스
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• 제12권6호
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• pp.61-72
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• 2008

The UV-protection effect of green-tea dyed fabrics was reported in our previous studies. The chitosan was used as a natural mordant of cellulose fiber for green tea extract because chitosan is a natural bio-polymer. The increase in the UV protection property of summer cellulose fabrics, cotton and linen, upon the repetition of chitosan mordanting and green tea dyeing was observed. However, the physical property change would be followed by this repeated wet processing of the cellulose fabric. Therefore, the physical changes of the chitosan mordanted and green tea dyed cotton and linen fabrics were evaluated by KES-FB system. Tensile, shear, bending, compression, and surface characteristics were tested upon the repetition of mordanting and dyeing treatments. Linearity of tensile force increased in the treated cotton and linen samples. Tensile energy and resilience decreased in all treated fabrics. Shear stiffness increased in the treated cotton and linen in general. Shear hysteresis was increased in all cotton samples and some linen samples. In cotton, the bending rigidity in all treated cottons increased except C3G3. As the chitosan mordanting numbers increased, the bending rigidity tended to decrease. In linen, the bending rigidity and hysteresis increased in all treated samples. Compressional energy and resilience increased as the number of chitosan mordanting increased both in cotton and linen. This could be the result of the increase in thickness upon chitosan mordanting. Surface coefficient of friction increased in the treated cotton and linen in general. Surface roughness tended to increase in cotton.

• 한국의류학회지
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• 제22권4호
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• pp.535-542
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• 1998

Cotton fabrics were treated with BTCA, which is used to improve the wrinkle recovery property of cotton fabrics. BTCA, with varying its concentrations, was treated on cotton fabrics by pad dry-cure technique. BTCA contents in treated cotton fabrics were determined by the weight gain and the FT-lR spectrometer. The effects on the sorption and physical properties of BTCA treated fabrics were investigated. IR spectra showed that ester-crosslinks were produced in BTCA treated cotton fabrics. And as increasing the concentration of BTCA, ester-crosslinks are increased in amorphous regions of fabrics. Moisture regain and water imbibition of treated fabrics were reduced. But, they were increased over a certain concentration. Dye sorptions also were reduced, but they were similar over 6% BTCA. When BTCA was treated on cotton fabrics, DP rating and wrinkle recovery angle were improved. On the other hand, strength retentions of treated fabrics were lower than untreated fabrics. Stiffness was increased.

• 한국잠사곤충학회지
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• 제40권1호
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• pp.70-77
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• 1998

This study was carried out in order to find out the relationship between physical and chemical properties of silk fiber treated by concentrated calcium nitrate solution. The tensile, thermal and dynamic mechanical properties are also examined on Ca(NO3)2 treated silk fibers. The tensile properties of silk fibers treated by calcium nitrate changed with a concentration. The thermal behavior were also affected by the concentration of calcium nitrate. The degradation temperature (endotherms) and glass transition temperature shifted to lower temperature as the treated concentration increased. It is thought that the physical properties are strongly related to the structure and morphology of Ca(NO3)2 treated silk fibers. As a result, these give property changes with a concentration dependence.

• 한국의류산업학회지
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• 제17권2호
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• pp.295-304
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• 2015

This paper investigated wear comfort property of heat storage knitted fabrics for high emotional garment. For this purpose, ZrC imbedded PET knitted fabric was prepared and various physical properties such as thermal, wicking and drying characteristics were measured. In addition, far-infrared emission characteristics of ZrC imbedded PET was analysed and tactile hand property and dye affinity of ZrC imbedded knitted fabric were also studied in comparison with regular and other commercial heat storage PET knitted fabrics. It was observed that Zr imbedded amount in the yarn was 19.29% by ingredient analysis and far-infrared emission energy was $3.65{\times}10^2W/m^2$, emissivity was 0.906 at the range of wavelength $6{\sim}20{\mu}m$. It was found that maximum heat flow (Qmax) of ZrC imbedded PET knitted fabric was lower than that of regular PET one and warmth keepability rate was higher than that of regular PET one, which means ZrC imbedded PET have heat storage property. Drying property of ZrC imbedded knitted fabric was better than that of regular PET one due to heat by far-infrared emitted from ZrC in the core of filament. It revealed that wicking property of the ZrC imbedded fabric was not influenced by far-infrared emission, but affected by fibre physical properties. Tactile hand property of ZrC imbedded knitted fabric was not influenced by imbedding ZrC in the filament but affected preferably by structure of knitted fabric. Dye affinity of ZrC imbedded PET knitted fabric was less influenced by dyeing temperature and time than regular PET knitted one.

• 한국지형학회지
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• 제23권1호
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• pp.1-16
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• 2016

This study estimates relationships between physical and chemical weathering indices of various rock types and topographical relief. Physical weathering properties such as rock strength and joint and chemical weathering indices such as the $SiO_2/Al2O_3$, CIA and WPI were analyzed from 18 rock outcrops in mountain and valley areas consisting of 9 rock types. The results indicate that the elevation and relief of topography increase physical strength of rock increases. It can be suggested that the total r(rock-mass strength rating) and R(rock rebound strength by Schmidt Hammer) are most useful indices as a quantitative weathering property factor to explain formative causes of topographical relief. The results also suggest that rock types such as sandstone, granite, gneiss and schist are most suitable to explain meaningful difference in topographical relief with the physical and chemical weathering indices.

• 대한토목학회논문집
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• 제12권4호
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• pp.49-57
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• 1992

본 연구(研究)는 노화(老化)에 의한 아스팔트시멘트의 물리적 성질변화를 크로마토그램에 근거(根據)하여 유성학적(流性學的)으로 고찰(考察)하였다. 3종류의 AC-20 아스팔트시멘트와 그것을 인공노화(人工老化)시킨 것 그리고 도로(道路)포장의 코어로부터 추출(抽出)해낸 자연노화(自然老化)된 아스팔트에 대하여 3가지 물리적 성질과, 고압(高壓) 겔 투과(透過) 크로마토그래프(HP-GPC)를 이용한 크로마토그램(분자입도분포(分子粒度分布))을 측정(測定)하였다. 이 물리적 성질과 HP-GPC 결과를 분석(分析)하여 노화전후(老化前後)의 크로마토그램과 물리적 성질의 상관관계(相關關係)를 고찰(考察)하였다. 물리적 성질로는 점도(粘度), 동점도(動粘度), 퇴입도(退入度)를 구하였으며, HP-GPC 시험에서는 THF가 순환용액으로 사용되고 RI 검출기가 사용되었다. 크로마토그램을 같은 시간간격(時間間隔)의 10구간으로 분할(分割)하여, 각 구간의 분할면적비(分割面積比)와 물리적 성질이 통계분석(統計分析)에 사용되었다. 이 연구결과(研究結果) 아스팔트시멘트의 물리적 성질은 크로마토그램 특성과 매우 밀접한 관계가 있음을 알 수 있었다. 또한 아스팔트의 노화는 유성학적으로 분자입도의 구성비가 변환되는 과정임을 알 수 있었다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2010년도 춘계 학술논문 발표대회 1부
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• pp.77-81
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• 2010

This study deals with the analysis of color-difference and physical property of anti-corrosion coatings using at inside of concrete tank for drinking water. Because anti-corrosion coatings are effected by chemical attack, color and physical property are changed. So in this study when epoxy resin coatings of 3 types were received chemical attack by Cl- and NaOH, we present the co-relationship between color-difference and bond strength. For this study, we used the colorimetry, which can measure the degree of color difference on surface of materials. As the results, in case of Cl-, color change is appeared, bond strength also is decreased. From this experiment, we could know that color change due to chemical aging has the deep relationship with physical performance(bond strength) materials. further researches are needed.