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연구논문 : 정전용량방식 터치스크린에 작동하는 전도성 가죽장갑 소재의 제조
홍경화 ( Kyung Hwa Hong ) 한국의류산업학회 2013 한국의류산업학회지 Vol.14 No.6
Smartphone is integrated into the daily lives of all types of people not even young generation. A touch screen display is a primary input device of a smart phone, a tablet computer, etc. While there are many tough technologies in existence, resistive and capacitive are dominant and currently lead the touch screen panel industry. And a capacitive touch screen panel widely used in smart phones is coated with a material that stores electrical charges. In this study, we tried to manufacture gloves produced with electro-conducting leather as a tool to operate a touch panel screen. Therefore, electrically conductive materials, Polyaniline(PANI), Poly(3,4-ethylenedioxythiophene) (PEDOT), and Carbon nanotubes (CNT) were applied to the surface of leather to be used as a touching operator for capacitive touch screen panel. The leather samples were treated by simple painting method; firstly, they were painted with aqueous solution containing each of the electrically conductive materials and then dried. This cycle was repeated three times. Consequently, the treated leather samples showed electrical conductivity and reasonable working performance to the capacitive touch screen. And, PANI showed the best performance and highest electrical conductivity, and then PEDOT and, CNT in decreasing order. This is because the solubilities of PANI and PEDOT show higher than dispersibility of CNT. Thus, the concentration of conducting polymers was greater than that of CNT in the treating solutions.
연구논문 : 여름철 냉감성 의류소재 개발을 위한 비스코스 레이온 중심의 직물 제조 및 PCM 가공
홍경화 ( Kyung Hwa Hong ) 한국의류산업학회 2014 한국의류산업학회지 Vol.16 No.2
To develop cool touch feeling fabrics for summer clothing material, it was manufactured several compositions of woven fabrics, having rayon multi-filament yarn (non-twisted) as warp and various kinds of yarn, such as viscose rayonmulti-filament yarn (twisted), tencel® spun yarn, PET high absorbance quick dry filament yarn, and PET based rayon-likeyarn, as weft. After preparing the fabrics, basic properties of the fabrics were investigated, such as air-permeability, tensile strength, absorption rate, drying rate, etc. Also, surface warm / cool sensations of the woven fabrics were assessed by Qmax Warm / Cool Touch Tester. It was observed that the fabrics composed of viscose rayon multi-filament yarn (warp)and PET high absorbance quick dry filament yarn (weft) showed excellent surface cool touch sensation-the highest Qmaxvalue. This is because the fabric having flat shaped PET high absorbance quick dry filament shows the largest contact areawith Qmax measuring plate. And, the fabric also showed superior high absorbance and quick dry property as expected. In addition, we treated phase change material (PCM) on the surface of the fabric composed of viscose rayon multi-filamentyarn (warp) and PET high absorbance quick dry filament yarn(weft) to improve the cool touch feeling. However, the surface cool touch feeling was impaired by resin treated with PCM during the finishing process.
골관절염 환자의 수중리듬운동 참가정도에 따른 관절통증정도와 일상생활능력의 차이
홍경화 ( Kyung Hwa Hong ),조규권 ( Kyu Kwon Cho ) 한국리듬운동학회 2012 한국리듬운동학회지 Vol.5 No.1
The purpose of this study was to examine the difference of level of joins pain and activities of daily living ability according to the degree of aqua rhythm exercise participations in osteoarthritis patient. It has been aimed at 81 members who have participated in the aqua rhythm exercise participations, living in kangwon-do province and the results are as follows. The level of pains aquarobic participants scored its higher than swimming participants. Aquarobic exercise as rehabilitation program was getting better than swimming exercise. Participation in activities of daily living, based on the degree of participation in the aquarobic exercise, sleep, sex life, social life, travel rather than swimming exercise, a group of effective. Participation in less than 1 hour per day, a group of robbers self-management skills, standing, sex life, travel on more effective. If you look at the underwater movement as a result of over participated in everyday life, reducing the pain and discomfort that occurs from time to time everyday to improve the ability of active methods are meant to be.
레이온계 여름용 직물에서 매염제 종류에 따른 오배자 염색의 색채발현 및 기능성에 관한 연구
홍경화 ( Kyung Hwa Hong ) 한국의류학회 2017 한국의류학회지 Vol.41 No.2
Gallnuts are known to exert various pharmaceutical properties that include anti-inflammatory, antimicrobial, antioxidant, and detoxifying effects. Gallnut extract is thought to be a particularly safe antimicrobial agent for textile application due to its natural origins. Hence, textiles were dyed with gallnut to develop multi-functional clothing material with no harmful effects. In this study, three kinds of cool touch woven fabrics, each comprised of 100% viscose rayon filament, viscose rayon filament/high absorption & quick dry (polyester) filament, and viscose rayon filament/tencel <sup>®</sup> spun yarn, were prepared and used as substrates for gallnut dyeing to especially develop functional cool touch textiles for summer clothing material. On the other hand, gallnut dyeing was conducted with mordanting with iron, lime or alum, which induced different colors on the dyed textiles. Dyed textiles were then investigated by SEM, FTIR, antibacterial test, and antioxidant test. Subsequently, gallnut dyed textiles indicated excellent antibacterial ability and deodorization activity regardless of mordant species. However, only gallnut dyed textiles mordanted with iron and alum showed significant antioxidant ability. In addition, the dyeing processes impair the cool touch feeling of the textiles by changing the micro structure of the textile surface.
조선건축회 발행 『건축자료형록(建築資料型錄)』에 관한 연구: 건축재료 유통범위를 중심으로
홍경화,한동수,Hong, Kyung-Hwa,Han, Dong-Soo 한국건축역사학회 2018 건축역사연구 Vol.27 No.3
In the 1930s, The Architectural Association of Joseon run the 'Architectural Material Display' on the 2nd floor of the Japan Life Insurance Building in Hwanggumjeong(currently Euljiro street). The purpose of this place was to introduce new architectural materials to builders. And they issued a "建築資料型錄(Architectural Material Catalog)" and distributed it free of charge so that people in districts at long distances can make use of it. This catalog contains descriptions, photographs and drawings of various architectural materials that were common at the time, and the overseas branch address of the store is stated. The purpose of this research is to investigate the type and characteristics of architectural materials distributed in Northeast Asia around the 1930s, the region of sale, affiliated companies by closely analyzing the "建築資料型錄".
나노 $TiO_2$로 가공한 폴리에스터와 나일론 직물의 광분해성에 관한 연구
홍경화,강태진,Hong, Kyung-Hwa,Kang, Tae-Jin 한국섬유공학회 2005 한국섬유공학회지 Vol.42 No.4
In this study, we prepared $TiO_2$ nanoparticles $(<\~10nm)$ whose crystalline structure were predominantly anatase. However, during the pad-dry-cure process, many of the $TiO_2$ particles aggregated on the surface of nylon and PET fabrics. The antimicrobial activities and photocatalytic degradation properties of the Ti02 treated nylon and PET fabrics were analyzed and the results suggest that the $TiO_2$ promotes the degradation of the nylon and PET polymers.
아기 띠의 힙시트와 허리지지 유무에 따른 근피로도와 주관적 피로도 평가
이희란,홍경화,Lee, Heeran,Hong, Kyung Hwa 한국의류산업학회 2017 한국의류산업학회지 Vol.19 No.4
Discomfort as well as muscular pain and musculoskeletal diseases occur in cases of stressed posture due to prolonged pressure. Therefore, the American Academy of Orthopaedic Surgeons (AAOS) and Pediatric Orthopaedic Society of North America (POSNA) recommend that bags that weigh no more than 15 - 20% of the wearer's weight. However, despite the prolonged pressure from using baby carriers, there are no recommendations and limited studies on how to protect wearers. Therefore, this study investigates subjective fatigue according to the usage of waist support and hip seat. Based on this, muscle fatigue and secondary subjective fatigue according to three types of currently commercial baby carriers (X-type, H-type, and H-hip type) were measured. Subjective comfortability was evaluated on a 5 point Likert-scale and subjective fatigue was evaluated on Borg's CR-10 scale. Objective muscle fatigue was also compared by measuring and analyzing electromyogram (EMG). The results of primary subjective fatigue showed statistically significant changes in the shoulders, waist, calves, and soles of the feet according to the usage of hip seats and waist support. Electromyogram measurements also showed less muscle fatigue at the upper trapezius muscle and thoracic erector spine muscle for the H-hip seat baby carrier, which has both waist support and hip seat, compared to an X-type baby carrier, which has neither. However, results of subjective fatigue showed opposite results at the waist despite having same results at the shoulders and beneath the shoulders. This show discrepancies between objective muscle fatigue and subjective fatigue; therefore, that both aspects must be taken into consideration when developing ergonomic baby carriers.