Tensiometric 법을 이용한 친수화 PET 섬유의 표면특성 분석

정혜원,S . Kay Obendorf ( Hae Won Chung,S . Kay Obendorf ) 한국의류학회 1991 한국의류학회지 Vol.15 No.4

The dispersion and polar force components of the surface free energy of PET fibers untreated and treated with hydrophilic chemicals, such as nonionic-soil release polymer (SRP), anionic, nonionic and hydrophilic silicone, were determined using harmonic-mean and geometric-mean methods. Contact angles of water and methylene iodide on the fibers were determined from the adhesion tensions using tensiometric method. Fibers treated with hydrophilic chemicals have the increased polar force component and the decreased dispersion force component. The adhesion tensions of triolein for the hydrophilic treated fibers were smaller than that for untreated fiber.

헹굼성 평가를 위한 세액의 전기전도도 측정과 기존 방법의 비교

정혜원,사미현,송화순,송유선,Chung, Hae-Won,Sa, Mi-Hyun,Song, Wha-Soon,Song, Yu-Seon 한국섬유공학회 2008 한국섬유공학회지 Vol.45 No.4

Drum-type washing machines are gaining in popularity because they have the advantages of a higher washing performance and water conservation. On the other hand, drum-type machines, which have a lower wash liquor-to-fabric ratio, call into question rinsing efficiency. Though rinsing performance is one of the most important factors in effective washing, a criterion method for measuring the rinsing performance has not yet been established. We have used existing methods to evaluate the rinsing performances. In addition, we suggest a method of measuring the electrical conductivity of detergent solutions and verify the relationships with the existing methods. The load was washed once and rinsed from 0 to 5 times. After rinsing, the load was moved to the higher spin extractor, and the extracted solution was measured for alkalinity (IEC 60456), PBIS concentration (AS/NZS 2040.1), LAS concentration, pH and the electrical conductivity of the NaCl solution (KS C 9608) to evaluate the rinsing efficiency. Moreover, LAS in the fabric after the rinsing process was extracted with water by soxhlet and measured. After each step in the laundering process, the load was spun at 600 rpm, 800 rpm or 1000 rpm. Except for the pH method, every other method, which was expressed per unit fabric weight, almost showed the same tendencies as the number of rinses increased. Though, the method of measuring the electrical conductivity of the detergent solutions especially showed the highest correlation with other methods, that method is labor efficient. Therefore measuring the electrical conductivity of detergent solution in this fashion was an efficient way to evaluate rinsing performance.

세척용수의 알칼리도와 경도에 따른 레드와인 오구의 색상과 세척성

정혜원,김효정,Chung, Hae-Won,Kim, Hyo-Jeong 한국섬유공학회 2011 한국섬유공학회지 Vol.48 No.6

Red wine has become very popular, in part for its professed health benefits. Anthocyanin pigments, which are the main components of the pigments in red wine, are changed in the molecular structures and the color with the solution having different alkalinity and metals. The color changes of a red wine soiled cloth after washing in various pHs and water hardness solutions were studied. Distilled and tap water, which have lower water hardness, showed the highest $L^*$ value and lowest $a^*$ and $b^*$ values at pH 9. The detergent with added oxygen bleach was more effective in removing red wine soil, even though its pH was 10.8. The effect of the red wine removal with the solution where bleach was added separately was much lower than with the solution of the detergent containing bleach. Water hardness greatly affected the color of the cloth, soiled with red wine after washing. That is, the color was the faintest when the cloth was washed with the bleach-added detergent solution having 0 ppm of water hardness. An effective and economical method or equipment for removing metals in a washing solution for a washing machine should be developed to enhance the stain and soil removal.

β-cyclodextrin 가공 나일론 직물과 PET 직물의 특성

정혜원,황나원,Chung, Hae-Won,Hwang, Na-Won 한국섬유공학회 2012 한국섬유공학회지 Vol.49 No.2

${\beta}$-CD is produced from starch through enzymatic degradation, and therefore it is an eco-friendly material and isn't harmful to the body. Nylon and PET fabrics are being increasingly used in active wear, as customers prefer this more comfortable and multifunctional material, as it provides antimicrobial properties and the removal of body malodor. That being said, ${\beta}$-CD is a proper material for these purposes. The ${\beta}$-CD was applied to a nylon 66 fabric and a PET fabric which were not pre-modified, and also applied to the fabrics that were modified with $O_2$ plasma or alkaline solution in order to increase surface roughness. The characteristics of these fabrics were studied. The PET fabric, which was pretreated with a NaOH solution, gains more weight than the PET fabric without pretreatment by the ${\beta}$-CD finishing. A crosslink between nylon 66 or the PET fiber and the ${\beta}$-CD finishing agent was not formed; however, the crosslink was formed in cotton fibers. This was confirmed using FT-IR and TGA analysis. The whiteness decreased little, the value of WT and MIU decreased, and that of B and RT increased with the ${\beta}$-CD finish. All of the ${\beta}$-CD finished fabrics had washing fastness after 10 washing cycles, even though nylon 66 and the PET fibers were not crosslinked with the ${\beta}$-CD finishing agent.

드럼세탁기의 헹굼성에 영향을 미치는 세탁조건

정혜원,사미현,송유선,송화순,Chung, Hae-Won,Sa, Mi-Hyun,Song, Yu-Seon,Son, Wha-Soon 한국섬유공학회 2009 한국섬유공학회지 Vol.46 No.5

A drum-type washing machine washes more effectively and consumes less water than the other type washing machines. We need to find the most effective washing conditions to increase the rinsing performance with the reduced amount of rinsing liquid in the drum-type washing machine. In order to determine the most effective washing conditions on the rinsing performance, we have considerd the following factors: main-washing liquid ratio, spin-drying time, spin speed during spin-drying, rinsing liquid ratio, number of rinses, rinsing time, and load of fabric. We also compared the rinsing performance between a controlled wash cycle of the drum-type washing machine and a standard wash cycle of a commercial pulsator-type washing machine. We measured the electrical conductivity of the liquid which was extracted from the fabric after the main-wash and each number of rinse. Increasing the number of rinses was the most important factor in increasing the rinsing performance. Then the rinsing liquor ratio, the main-washing liquid ratio, the load of the fabric, and the spin speed during spin-drying had a decreasing effect on the rinsing performance in that order. In our research the rinsing time and the spin-drying time did not show meaningful difference. The rinsing performance of the drum-type washing machine with a lower rinsing liquor ratio could be the same as or better than that of the pulsator-type washing machine because of the lager drum radius and a much higher spin speed.

텐터 신장률이 다른 면/스판덱스 능직물의 반복세탁에 따른 역학적 특성 및 태 비교

정혜원,권진,김효정,석혜준,Chung, Hae-Won,Kwon, Jin,Kim, Hyo-Jeong,Seok, Hye-Joon 한국섬유공학회 2010 한국섬유공학회지 Vol.47 No.4

The effects of the tentering-extension rates and repeated washing on the mechanical properties and hand values of cotton/ spandex twill were examined. A 3% spandex containing cotton twill was treated by tenter extension at different rates of 0%, 5%, 10% and 15%. The processed fabric with a 0% extension rate was also dyed using a reactive dye. The KES-FB system was utilized to measure the mechanical properties of the twill, and the basic and total hand values were determined using a KN-201-MDY and KN-301-WINTER, respectively. The fabrics treated with greater tentering extension and dried in a clothes tumble dryer showed lower bending and shear properties, and became softer and smoother. The greatest change in the mechanical properties and hand values occurred after the first wash, but the differences in the washed and unwashed state decreased with increasing number of wash cycles. These results show that cotton/spandex twill should be extended 5% during tentering to yield less deterioration of the T.H.V., and be dried in a clothes tumble dryer to maintain a soft and smooth hand without affecting the shrinkage and elasticity.

권구의 屛山移居期 作品硏究

鄭惠媛(Chung Hae-Won) 한국시조학회 1996 時調學論叢 Vol.12 No.-

보문 : 세탁에 의한 편성물 내의의 변형

정혜원(Hae Won Chung),나영주(Young Joo Na) 韓國衣類學會 1999 한국의류학회지 Vol.23 No.5

연구논문 : 직물의 β-cyclodextrin 가공에 따른 휘발성 유기성분의 흡착과 제거

정혜원 ( Hae Won Chung ),황나원 ( Na Won Hwang ),김주연 ( Joo Yeon Kin ),신승엽 ( Seung Yeop Shin ) 한국의류학회 2013 한국의류학회지 Vol.37 No.1

Clothes that retain and emanate body odor feel uncomfortable and unclean; subsequently, the adsorption, desorption and removal amounts of malodorous compounds from fabrics with different polarities were examined. 1-Octen-3-one, octanal and isovaleric acid, which are important malodor compounds from the body, were used as volatile organic compounds (VOC). Samples were prepared with unfinished and β-CD finished cotton, nylon and PET fabrics. The amounts of VOCs retained on the fabrics were measured using headspace GC-MS; in addition, the odor intensity of the samples were evaluated by 10 trained panelists. The amounts adsorbed were estimated by weight gain; however, moisture was found to have a larger effect on the increase in weight than VOCs. The polarity of the VOCs decreased in the order of isovaleric acid, octanal and 1-octen-3-one. Despite the exceptionally large amounts of octanal adsorbed on the nylon sample, the amounts of malodorous compounds adsorbed on fabrics increased with the decreasing VOC molecular weight. The unfinished PET sample adsorbed more VOCs than the unfinished-fabric samples. The odor intensity was mostly weaker in the β-CD finished fabrics than in the unfinished fabrics. The odor intensity of the β-CD finished fabrics was lower than unfinished fabrics. The amount of VOCs that remained on the soiled fabric samples after storing in air for 24 hrs decreased with the increasing VOC vapor pressure. Most VOCs were removed by washing; however, more VOCs were left on the β-CD finished fabrics than unfinished fabrics. The intensity of the odor from the unfinished PET and β-CD finished fabrics was stronger and weaker, respectively, than that of other fabrics, even when the same amounts of VOCs remained.

時調에 있어서의 空間認識의 方法

鄭惠媛(Chung Hae Won) 한국시조학회 1985 時調學論叢 Vol.1 No.-