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Abietic Acid 기반 Methacrylate 유도체의 합성과 광경화 특성
정은교(Eun-Gyo Jeong),류상욱(Sang-Woog Ryu) 한국고분자학회 2020 폴리머 Vol.44 No.6
본 연구에서는 식물유래 천연물질인 abietic acid와 glycidyl methacrylate의 반응을 통해 methacryloyl-2-hydroxypropyl abietate(MHPA)를 합성하였다. 합성된 MHPA는 다양한 비율의 poly(ethylene glycol) dimethacrylate(PEGDMA)와 혼합되어 광경화용 레진으로 제조되었으며 MHPA가 경화에 미치는 영향을 평가하였다. 그 결과 MHPA 함량이 증가할수록 경화도가 감소하였지만 3 0 wt%까지는 96%의 경화도를 유지하였다. 또한 MHPA의 존재는 경화필름의 친수성을 감소시키고 박리강도와 탄성계수에 대한 개선을 가능하게 하였다. 특히 3 0 wt%의 MHPA가 포함된 경화필름에서 박리강도와 탄성계수가 각각 140%와 500% 향상된 결과를 보여주었다. In this study, methacryloyl-2-hydroxypropyl abietate (MHPA) was synthesized through the reaction of abietic acid, a plant-derived natural substance, with glycidyl methacrylate. The synthesized MHPA was mixed with various ratios of poly(ethylene glycol) dimethacrylate (PEGDMA) to prepare a photocurable resin, and the effect of MHPA content on curing behavior was evaluated. As a result, it was found that while the MHPA content increased, the degree of curing decreased, but the curing efficiency of 96% was maintained up to 30 wt% of MHPA. In addition, the presence of MHPA reduced the hydrophilicity of the cured film and improved the peel strength and elastic modulus. In particular, the peel strength and modulus of elasticity were improved by 140% and 500%, respectively, in the cured film containing 30 wt% of MHPA.
스마트 텍스타일 구현을 위한 OLED 기반 웨어러블 디스플레이 리뷰
정은교 ( Eun Gyo Jeong ),이창민 ( Chang-min Lee ),조석호 ( Seok Ho Cho ) 한국의류산업학회 2021 한국의류산업학회지 Vol.23 No.6
Clothing has a very important role in human life, and it is the most human-friendly platform because humans wear it in almost all the time. In the recent years, smart clothing integrated with various functions is solidifying its position as the core of next-generation Information and Communications Technology(ICT). With this global trend, the smart textiles, textiles embedded with electronic devices that are capable of performing various functions, have been attracting a lot of attention. Therefore, various research activities on the smart textiles are in progress, and the global market outlook for the smart textiles is also showing rapid growth. Among the various smart textile technologies, the textile/fiber-based wearable display has been attracting more attention because it is an essential element for wearers to intuitively control the functions integrated in the smart textiles. This paper provides insightful information and the technological elements of organic light emitting diodes(OLEDs) display, which have been evaluated as the most ideal device for luminescent clothing. Since, OLEDs have many advantages such as light weight, extremely thin thickness and great flexibility, the textile/fiber-based wearable OLEDs can be worn without any inconvenience. In addition, by introducing previous studies on the textile/fiber-based OLED displays, we intend to consider the commercial potential of the textile/fiber-based smart luminescent clothing using the OLED technologies.
영유아 및 노령 치매 환자를 위한 릴리패드 아두이노 기반 스마트 기저귀
김예인(Ye-In Kim),장서린(Seo-Lin Jang),정은교(Eun-Gyo Jeong) 전남대학교 생활과학연구소 2022 生活科學硏究 Vol.32 No.-
Wearable technology can be divided into a type that is placed on or attached to the body, and a type in the form of clothes. First, wearable devices that are attached to the body, such as wearable bands and watches, are developing focused on performing various and complex functions that will replace mobile devices. Meanwhile, smart clothing worn on the body is developing in the direction to satisfy human physiological needs, health, and emotions. Until now, both wearable devices and smart clothing have evolved with an emphasis on functionality, ergonomics and physical aspects. However, future smart clothing design is expected to develop that satisfies immaterial properties such as human emotions and self-actualization rather than technology-oriented designs. Nevertheless, it is difficult for fashion design majors who are familiar to traditional education to use digital as a formative element rather than a device. Therefore, this study developed smart clothing through Lilypad Arduino, which can access as a design element unlike other wearable devices. A smart diaper using Lilypad Arduino, temperature sensor, light emitting diodes, and buzzer module was developed that easily check the condition. The arrangement of electronic components were designed for user convenience, and it was confirmed that the smart diaper operates well.