• 한국의상디자인학회지
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• 제16권4호
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• pp.99-116
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• 2014

The purpose of this study was to examine the state of scrub wearing among scrub uniforms medical staff. The results of the research is the following. First, As for the state of scrub uniforms, they wore scrubs only while they gave medical treatment and took care of routine work. Regarding the design of their current scrubs, type 1 was dominant, and the most common color was dark sky blue. Second, Concerning considerations for scrub design, they answered that scrubs should be designed to give no inconvenience during job performance. As for the image, they placed the most importance in a clean image due to hygiene. In relation to preference for color, pattern and materials, they had the most preference for dark blue, no pattern and materials that would not easily be contaminated. Third, As to preference for the length of the top, they were most fond of hip length, and short sleeves were their favorite length of sleeve. Concerning the design of the front and the back of the top, they had a liking for a box style with no straight cutting line. As for the design of the neckline, hem and pocket of the top, they had the most preference for round neckline, square bottom and round patch pocket respectively. Fourth, when the design preference of the respondents was analyzed, there were a difference between the men and the women in preference for neckline design. The women had a liking for round neck, whereas the men were fond of V neck. And the women showed a higher preference for rubber waistband than the men for the waist design of the pants. No gender differences were found in preference for color, pattern and the length of the top.

• 한국의류학회지
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• 제42권3호
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• pp.503-515
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• 2018

In this research, the three-dimensional structural and colorimetrical modeling of yarn-dyed woven fabrics was conducted based on the Kubelka-Munk theory (K-M theory) for their accurate color predictions. In the K-M theory for textile color formulation, the absorption and scattering coefficients, denoted K and S, respectively, of a colored fabric are represented using those of the individual colorants or color components used. One-hundred forty woven fabric samples were produced in a wide range of structures and colors using red, yellow, green, and blue yarns. Through the optimization of previous two-dimensional color prediction models by considering the key three-dimensional structural parameters of woven fabrics, three three-dimensional K/S-based color prediction models, that is, linear K/S, linear log K/S, and exponential K/S models, were developed. To evaluate the performance of the three-dimensional color prediction models, the color differences, ${\Delta}L^*$, ${\Delta}C^*$, ${\Delta}h^{\circ}$, and ${\Delta}E_{CMC(2:1)}$, between the predicted and the measured colors of the samples were calculated as error values and then compared with those of previous two-dimensional models. As a result, three-dimensional models have proved to be of substantially higher predictive accuracy than two-dimensional models in all lightness, chroma, and hue predictions with much lower ${\Delta}L^*$, ${\Delta}C^*$, ${\Delta}h^{\circ}$, and the resultant ${\Delta}E_{CMC(2:1)}$ values.

• 공업화학
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• 제30권1호
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• pp.23-28
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• 2019

탄소 실의 표면에 코팅 된 3차원 다공성 그래핀으로 구성된 슈퍼커패시터 케이블 소자를 보고하고자 한다. 그래핀의 3D 다공성 구조는 그래핀옥사이드로 코팅된 탄소 실을 사용하여 마이크로웨이브 활성화 방법에 의해 제작하였다. 마이크로파 조사의 사용은 환원제 없이 그래핀옥사이드를 환원된 그래핀옥사이드로 전환시키고 그래핀 시트를 박리 및 다공성 그래핀 시트로 활성화시켰다. 두 개의 와이어 전극을 고분자 겔 전해질과 결합하여 성공적으로 케이블 구조 형태의 슈퍼커패시터 소자를 제작하였다. 슈퍼커패시터 케이블은 매우 유연하기 때문에 다양한 형태의 장치로 변형될 수 있고 섬유 품목으로 통합될 수 있다. 주사 속도 10 mV/s에서 38.1 mF/cm의 높은 정전용량이 얻어졌다. 이용량은 500 mV/s에서 원래 값의 88%를 유지하였다. 장수명특성은 구부러진 형태에서도 10,000회 동안 충전/방전 과정을 반복함으로써 96.5%의 높은 정전용량 유지율을 증명하였다.

• Composites Research
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• 제32권2호
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• pp.113-119
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• 2019

본 연구의 목적은 자동차용 부품에 적용하기 위한 알루미늄 접합 제진 패널에 대한 기계적 특성 및 진동 특성을 도출하기 위한 것이며, 이를 위해서 알루미늄 하이브리드 소재와 알루미늄 원소재의 시험 및 시뮬레이션 결과가 상호 비교되었다. 알루미늄 제진 패널 및 알루미늄 원소재의 인장강도 평가를 통해서 알루미늄 하이브리드 소재의 인장강도 및 인장탄성계수가 알루미늄 원소재 대비 약 10% 내외로 낮음을 확인할 수 있었다. 소재 단위의 해석 및 시험을 통해서 하이브리드 소재가 원소재 대비 낮은 고유진동수를 나타냄을 확인하였고, 하이브리드 소재를 구성하는 수지의 두께가 높아질수록 손실계수가 상승됨을 확인하였다. 또한, 기계적 특성 평가 모사 시뮬레이션을 통해 시험결과와 시뮬레이션 결과가 잘 일치하며, 유한요소해석을 통한 소재의 성능예측이 가능함을 확인할 수 있었다.

• 패션비즈니스
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• 제23권1호
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• pp.14-24
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• 2019

Various types of functional bedding for inducing and maintaining sleep, are developed and launched with the importance of improving health through sleep emphasized currently. The purpose of this study is to examine development status and direction of functional bedding in the $4^{th}$ Industrial Revolution era, through systematic classification of elements of IoT-based smart bedding cases actively developed as functional bedding at home and abroad. Through previous research, literature and Internet data, characteristics and functional extension of smart bedding and the background of smart bed development was analyzed. And it was analyzed that smart bedding pursues recent functionalism and convergence of physical and digital concept such as IoT or AI, and also mental value to improve sleep quality. As bedroom where smart bedding place in has the private and limited characteristics and users are in sleep-conscious, that hard to ensure power and discomfort in carrying are moderated and the aesthetic elements are not very important, and that the smart bedding performance while sleeping were affected on developmental background. Based on CES case study and analysis on how smart beds are functionally expanded from conventional bedding, smart beds have gained information through digital sensing, and common properties that can be controlled anytime, anywhere, using a smart phone. Some set up the right environment and pose, while others stimulate nerves directly as active intervention. It is expected that smart bedding will be developed to cure user's body and mind, through active intervention when sleeping.

• 한국염색가공학회지
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• 제33권2호
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• pp.72-78
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• 2021

The purpose of this study, the purpose of this study is to activate the antibacterial effect on the Chlorinated polyvinyl chloride film by using Octadecyldimethyl (3-triethoxy silylpropyl) ammonium chloride antibacterial agent with Chlorinated polyvinyl chloride polymer, which is inexpensive and has excellent properties such as heat resistance and chemical resistance. The Chlorinated polyvinyl chloride polymer was dissolved in a dimethylacetamide solvent, and film samples were prepared by varying the ratio of Octadecyldimethyl (3-triethoxy silylpropyl) ammonium chloride to study the antibacterial performance. A Scanning Electron Microscope-Energy Dispersive X-ray Spectrometer and X-ray photoelectron spectroscopy were employed to confirm the elements in the samples. According to the initial decomposition temperature of the Chlorinated polyvinyl chloride film and the Chlorinated polyvinyl chloride/Octadecyldimet hyl (3-triethoxy silylpropyl) ammonium chloride(10%) film using a Thermogravimetric analyzer(TA-DTA), it was confirmed that the initial decomposition temperature was lowered due to the influence of Octadecyldimethyl (3-triethoxy silylpropyl) ammonium chloride. In addition, in order to measure the mechanical properties, Universal testing machine was used and the result showed that a strength of Chlorinated polyvinyl chloride/Octadecyldimethyl (3-triethoxy silylpropyl) ammonium chloride(10%) was 36.8 MPa. The antimicrobial properties of the Chlorinated polyvinyl chloride/Octadecyldimethyl (3-triethoxy silylpropyl) ammonium chloride(10%) film showed 99.9% antimicrobial properties.

• 한국염색가공학회지
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• 제34권1호
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• pp.46-57
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• 2022

In this study, the relationship between fiber orientation and mechanical properties with the injection pressure of polyamide-6/glass fiber composite materials manufactured by the injection molding process was investigated. Also, an actual experimental data and finite element model-based simulation data were analyzed. Specimens were manufactured through the injection molding process setting the injection pressure differently to 700, 800, 900, and 1000 bar, respectively. A morphological analysis and orientation of the PA6/GF composite material were observed using Optical microscope. Through tensile and flexural strength tests, the mechanical properties of the PA6/GF composite materials with the injection pressure were studied. As a result, it was confirmed that the mechanical properties were the superior under the injection pressure of 900 bar molding conditions. In addition, the mechanical properties of the actually manufactured specimen (PA6/GF) and virtual engineering S/W((Digimat, Abaqus) were used to compare and analyze the analysis results for the mechanical properties, and based on the reliable DB, the physical properties of the PA6/GF composite characteristics were studied.

• 한국염색가공학회지
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• 제34권2호
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• pp.117-126
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• 2022

In this study, thermoplastic composites were manufactured using ABS(acrylonitrile butadiene styrene), PC(polycarbonate), and POE(polyolefin elastomer), which are thermoplastic plastics. Twin screw extruder and injection molding were used to manufacture thermoplastic composites. When the ABS/PC/POE thermoplastic composite material was manufactured, the POE mass fraction was set to 1 to 5 wt.%, and the thermal and mechanical properties according to the POE mass fraction were analyzed. Based on the physical properties of ABS/PC/POE, a 3D model in the form of an e-bike frame was created. After setting the boundary conditions, when an external load is applied, geometry simulation was performed to predict product performance. The ABS/PC/POE thermoplastic composite material exhibited the best physical properties when the mass fraction of POE was 3 wt.%. In the simulation results for the physical properties of the 3D model in the form of an e-bike frame, the best physical properties were shown when the mass fraction of POE was 2 ~ 3 wt.%. As a result, the manufacturing conditions for ABS/PC/POE thermoplastic composite materials were set, and research was conducted to reduce product development costs and development time.

• 센서학회지
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• 제31권5호
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• pp.312-317
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• 2022

Piezoelectric energy harvesting has attracted increasing attention over the last decade as a means for generating sustainable and long-lasting energy from wasted mechanical energy. To develop self-powered wearable devices, piezoelectric materials should be flexible, stretchable, and bio-eco-friendly. This study proposed the fabrication of stretchable piezoelectric composites via dispersing perovskite-structured BaTiO₃ nanoparticles inside an Ecoflex polymeric matrix. In particular, the stretchable piezoelectric sensor array was fabricated via a simple and cost-effective spin-coating process by exploiting the piezoelectric composite comprising of BaTiO₃ nanoparticles, Ecoflex matrix, and stretchable Ag coated textile electrodes. The fabricated sensor generated an output voltage of ~4.3 V under repeated compressing deformations. Moreover, the piezoelectric sensor array exhibited robust mechanical stability during mechanical pushing of ~5,000 cycles. Finite element method with multiphysics COMSOL simulation program was employed to support the experimental output performance of the fabricated device. Finally, the stretchable piezoelectric sensor array can be used as a self-powered touch sensor that can effectively detect and distinguish mechanical stimuli, such as pressing by a human finger. The fabricated sensor demonstrated potential to be used in a stretchable, lead-free, and scalable piezoelectric sensor array.

• 복식문화연구
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• 제31권4호
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• pp.519-532
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• 2023

The online shopping market is expanding, with online shopping malls now subdivided into personal computer(PC) and mobile versions. Meanwhile, various efforts to promote online sales are being carried out in a bid to improve performance, and detailed research is required to inform such strategies. The purpose of this study was to classify online shopping mall types into PC fashion malls and mobile fashion malls with the aim of assessing sales promotion satisfaction and investigating the relationship between sales promotion satisfaction and consumers' behavioral intentions. Data were collected by a survey firm in June 2023, and 248 copies of the data were used for analysis. SPSS 28.0 was used to process the data, and frequency analysis, factor analysis, reliability analysis, and regression analysis were performed. The satisfaction factors for various sales promotions used by PC and mobile fashion shopping malls were empirically subdivided in consideration of consumer perspectives, and potentially effective marketing strategies were presented. Differences were observed in the type of satisfaction with sales promotion between PC fashion shopping malls and mobile fashion shopping malls and in the effect of sales promotion satisfaction on behavioral intention. Based on the study's findings, effective sales promotion strategies that can increase satisfaction and enhance behavioral intention may be developed and implemented through the use of various and different sales promotion strategies in PC and mobile fashion shopping malls.