• Title, Summary, Keyword: absorbency

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Assessment of Quick Sweat Absorbency and High Speed Drying Fabric Using a Psychophysical Method (정신물리학적 측정법을 이용한 흡한속건성평가)

  • 김주용;구지은
    • Proceedings of the Korean Society for Emotion and Sensibility Conference
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    • pp.1311-1318
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    • 2003
  • 최근 흡한 속건성은 사이언스 소재로 가장 보편적으로 이용되고 있는 소재 성능이다. 하지만 아직 제대로 된 측정 평가법이 존재하고 있지 않고, 몇몇 의류업체에서는 단순히 객관적 속성만을 측정하고 있다. 본 연구에서는 객관적 속성인지들의 연속적이 값들이 실제 인체에서는 얼마만큼의 변별력으로 인식되는지 정신물리학적 측정법으로 최소 자극치(PSE)를 구하여 등급을 나누어 보았다. 시료는 흡한속건성 직물로 가장 많이 이용되고 있는 Coolmax(R), Coolever(R), 친수성 이중직물의 3개 그룹으로 나누었고, 측정 인자로 객관적 속성인자는 cling force, drying time을, 이와 대응하는 주관적 속성인자는 clinginess, dampness를 측정하고 각각의 PSE값을 구하였다. 그룹에 따라 객관적 속성인자 값들이 이라고 느끼는 PSE 구간까지 도달하는 시간과 속력을 측정하여 그룹마다의 흡한속건 등급을 정하였다. 또한 설계된 소재의 성능을 간접적으로 알 수 있는 transmissibility라는 인자도 도입하여 수분 전달성도 객관적으로 살펴볼 수 있었다. Clinginess, Dampness, Transmissibility 각 인자들을 평가해본 결과 Coolmax(R) 가 가장 우수함을 알 수 있었다.

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The Microwave Absorbing Characteristics of Ferrite-Iron-Rubber Composites. (Ferrite-Iron-Rubber 복합체의 전파흡수특성)

  • 신재영;오재희
    • Journal of the Korean Magnetics Society
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    • v.4 no.3
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    • pp.208-213
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    • 1994
  • Wide-band absorbency and small layer thickness are required in the high- performance microwave absorber. In order to reduce the thickness of the absorber, ferrite-iron-rubber composites were proposed and its properties were investigated. The increase in both real part of perrreability and permittivity of the composites were observed with addition of -Fe powder and this behavior results in the decrease of fm dm term. The matching thicknesses of ferrite-iron-ruber composites were relatively small(0.5~2.0 mm) in the frequency range of 3~17 GHz as comIBfed to than that of ferrite-rubbr composit.

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Weight Loss Rates and Physical Properties Changes of Cellulose Fabrics by Cellulase Treatment (셀룰라제처리에 의한 섬유소계직물의 감량률과 물리적성능 변화)

  • Lee Hye-Ja;Chon Hae-Kyung;Yoo Hye-Ja
    • Journal of the Korean Home Economics Association
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    • v.37 no.12
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    • pp.169-177
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    • 1999
  • This study has examined weight loss rates of Iyoceu, lyocell/cotton, cotton that were treated with cellulase under different concentration, time, temperature and pH. and compared physical properties changes of tensile strength, drape, moisture absorbency, shrinkage and dyeability. The notable results are summarized as follows: Lyocell was in need of pretreatment by NaOH in the side of weight loss, tensile strength and dyeability. Weight loss rates of cellulose fabrics by cellulase treatment were in the order of cotton > lyocell/cotton > lyocell at the same conditions. In case of lyocell and lyocell/cotton, weight loss rates showed up lower than cotton, while strength retention decreased, drape and strength flexibility were highly improved after cellulase treatment.

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A Study on the Differences Between the Textle Fiber Preference Groups in Children's Outdoor Clothing (유아외출복 구매자의 조성섬유 선호집단별 차이 분석)

  • 김선경
    • Journal of the Korean Home Economics Association
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    • v.36 no.1
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    • pp.117-128
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    • 1998
  • This study examined the relationships between textile fiber preference(natural, synthetic, blended) and the perceived importance of textile properties, knowledge of textile fibers and demographic variables, focused on children's outdoor clothing. Subjects were 291 mothers with preschool children. Data were collected using a self-administered questionnaire and analyzed using analysis of variance and crosstabulation analysis. The results indicated that; (1)preference of fiber was significantly related to the perceived importance of textile fiber properties concerning flame resistance, absorbency, and hand. (2)blended fiber preference group had more knowledge on textile fibers than the other groups. (3)preference of fiber was significantly related to the perceived differences of textile performance characteristics in comfort. (4)None of demographic variables influenced textile fiber preference. (5)No difference in price consideration was found between the textile fiber preference groups.

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Use Patterns and Desired Performance of Boardsailing Suits (보드세일링복의 사용실태 및 요구성능에 관한 연구)

  • 김선경
    • Journal of the Korean Home Economics Association
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    • v.36 no.7
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    • pp.97-110
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    • 1998
  • The purpose of this study was to examine the use and purchase patterns, design and satisfaction degree, and desired performance of boardsailing suits. The subjects were 266 boardsailing athletes and lovers. The results were as follows; (1) The demand of boardsailing suits for spring and autumn was larger than that for the other seasons. (2) The order of influencing power in purchasing boardsailing suits was fitness, textile material, design, color, cost, and brand. (3) Preference of design was one piece style and preference of pattern was character pattern. Additionally, the study on Korean patterns was demanded for international games like Olympics. (4) The order of satisfaction degree of currently used boardsailing suits was activity, size, design, material, sewing, color, pattern, and ease of wearing and taking off. (5) For the performance of boardsailing suits materials, the estimated values of absorbency, water repellency, dye fastness, biological resistance, weight, handle, air permeability, durability, and elasticity were much lower than the importance values.

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Photocrosslinking of PEO Films Using PEGDMA (PEGDMA를 이용한 PEO 필름의 광가교)

  • Gu, Gwang-Hoi;Jang, Jin-Ho
    • Proceedings of the Korean Society of Dyers and Finishers Conference
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    • pp.11-12
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    • 2008
  • Poly(ethylene oxide)(PEO) of molecular weight of 300,000 was crosslinked by UV irradiation in the presence of crosslinker. The photochemical crosslinking of PEO was enhanced by the addition of dimethacrylate crosslinkers in the film. Percent conversion of the polymer into gel as well as water absorbency were investigated gravimetrically. Gel fraction of PEO films increased with increasing crosslinker concentration. In the case of photocrosslinked PEO films with benzophenone, gel fraction reached about 95%. The thermal behavior of crosslinked PEO films was characterized by thermogravimetric analysis. The maximum decomposition temperature increased with increasing crosslinker concentration.

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Preparation of UV-curable alginate derivatives for drug immobilization on dressing foam

  • Kim, Jae-Won;Kim, Eun-Hye;Han, Ga-Dug;Noh, Seung-Hyun;Pyun, Do-Gi;Ito, Yoshihiro;Nah, Jae-Woon;Lee, Jae-Gwan;Son, Tae-Il
    • Journal of Industrial and Engineering Chemistry
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    • v.54
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    • pp.350-358
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    • 2017
  • The purpose of this study was to develop dressing foam with drug immobilization abilities by using Azidophenyl alginate (Az-alginate). We characterized prepared Az-alginate. Through the patterning test, immobilization of drug was confirmed. Degrees of photo-curing were identified by the photo-curing ratio test. Cytotoxicity test confirmed that Az-alginate was biocompatible. The protein releasing test measured the degree of drug released according to the concentration of Az-alginate. By examination of the water absorbency and moisture vapor transmission rate, characteristics of the dressing foam with photo-cured Az-alginate were measured. From the results of these tests, Az-alginate can be applied to the dressing foam.

Alginate Nanohydrogels Prepared by Emulsification-Diffusion Method

  • Lee, So-Min;Yoo, Eun-Soo;Ghim, Han-Do;Lee, Su-Jeong
    • Macromolecular Research
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    • v.17 no.3
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    • pp.168-173
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    • 2009
  • This study reports the preparation and characterization of nanohydrogels by using sodium alginate as a model material. Alginate nanohydrogels (ANH) were prepared by emulsification-diffusion method in a w/o system with 1,2-diacyl-sn-glycero- 3-phosphocholin as the lipophilic surfactant. The effects of the alginate to surfactant ratio and the remaining water contents on the mean particle size and swellability of ANHs were investigated in terms of the concentration, agitation speed, and agitation time. The feasibility of using nanohydrogels and their controllability were proved by the water the absorbency of ANHs during a 7-day evaluation by dynamic light scattering. In this work, the mean particle sizes of ANHs could be controlled from 49.2 nm (measured in ethanol phase) to $1.9{\mu}m$ (measured in water phase, after 7 days of water absorption).

Synthesis and Characterization of Sodium Acrylate and 2-Acrylamido-2- Methylpropane Sulphonate (AMPS) Copolymer Gels

  • Jassal, Manjeet;Chattopadhyay, Ritwik;Ganguly, Debojyoti
    • Fibers and Polymers
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    • v.5 no.2
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    • pp.95-104
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    • 2004
  • A series of superabsorbents based on acrylic acid (AA), sodium acrylate, 2-acrylamido-2-methylpropane sulphonic acid, N,N'-methylene bis-acrylamide (MBA) were prepared by inverse suspension polymerization. These hydrogels were further crosslinked on the surface with polyethylene glycol-600 (PEG-600). The water absorbency or swelling behaviors for these xerogels in water and 0.9% saline solutions, both under free condition and under load were investigated. Absorption characteristics of these hydrogels were found to depend on nature and concentration of crosslinker in the system. It was also found that the saline absorption was significantly improved as the incorporation of AMPS in the polymer was increased. The surface crosslinking introduced in the polymers was found to improve the absorption under load characteristics without lowering the free water absorption capacities of the polymer to a considerable extent.

Liquid Moisture Management and Surface Properties of the Fabric in Transient Condition (작업복 소재 직물의 액상 수분 전달 특성 및 표면특성 연구)

  • 유신정
    • Journal of the Korean Society of Clothing and Textiles
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    • v.25 no.1
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    • pp.61-70
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    • 2001
  • As important factors determining human sensorial comfort, liquid moisture management and surface properties of heat resistant workwear materials were examined. To figure out liquid moisture management properties of the test materials, absorption capacity, rate of absorption, and evaporation properties were assessed. A modified GATS(Gravimetric Absorbency Testing System) was used to measure the liquid moisture accumulation associated with the wicking of liquid moisture from sweating skin. The GATS procedure measures demand wettability of materials to take up liquid in a direction perpendicular to the fabric surface and it was modified to incorporate a special test cell and cover to assess absorption behavior in the presence of evaporation. Fabric stiffness, smoothness, number and the length of surface fibers, and an estimate of the contact area between the skin and fabric surface were measured to characterize the mechanical and surface properties of the test materials. Also an estimate of the force with which a fabric clings to moist skin was made using as wet-cling index.

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