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복강경 수술 유해가스 차단을 위한 필터의 모듈화 및 성능평가
홍성돈,이시우,홍영기,Hong, Sung Don,Lee, Si Woo,Hong, Young Ki 한국섬유공학회 2021 한국섬유공학회지 Vol.58 No.4
In this study, to solve the problem of harmful gases in laparoscopic surgery, the filtration efficiency of a meltblown nonwoven filter modified with hydrocharging treatment according to the change in basis weight was investigated. Experiments were conducted with both 35 GSM (M35) and 40 GSM (M40) using NaCl 32 LPM, and the resulting efficiencies were 99.312% and 99.973%, respectively. A composite filter with granular activated carbon (GAC) attached based on 20 GSM (M20) was also studied. The evaluation was confirmed when H13 and H14 grade HEPA filters were laminated with 99.993% and 99.995% filtration efficiency, respectively, on a C filter. In addition, to confirm the effect of moisture, experiments were conducted through four cycles after soaking in water and drying. As a result, all nonwoven fabrics showed a slight effect due to hydrocharging, and the HEPA grade could be maintained. However, GAC entering the composite filter confirmed the deodorant effect with an ammonia removal rate of 95.2%, and removal rates of 99.5%, 98.5%, 98.5%, 89.2%, and 95.9% for hydrogen sulfide, trimethylamine, acetaldehyde, toluene, and formaldehyde, respectively, were obtained. When the structure of such a composite filter was integrated with the module of a new type of trocar, the performance of the highly efficient filter was maintained without being affected by the clinical surgical activity radius during laparoscopic surgery. Finally, a basic study of the applicability of new surgical trocars for the removal of harmful gases was conducted.
색상 및 세탁견뢰도의 정량적 분석을 통한 신형 전투복 원단의 색상신뢰성 연구
홍성돈 ( Seongdon Hong ),김병순 ( Byung-soon Kim ),장연주 ( Yeonju Jang ),이정순 ( Jungsoon Lee ) 한국의류학회 2016 한국의류학회지 Vol.40 No.3
A new combat uniform is improved for added combat safety with various functions such as survivability, battle conformity and a camouflage performance system. Camouflage performance is an important factor in terms of combat survivability since it makes identification difficult and provide security. The combat uniform is worn under extreme conditions (exposure to ultraviolet light, sweat and friction) and an excellent color fastness to repeated washing is required. In this study, we investigated the color management, durability and discoloration of new combat uniform fabric with a digital pattern for camouflage performance to provide preliminary color management data. We examined color differences between standard fabric and mass-produced combat uniform fabrics, color differences between each military supply contract firm and color changes in combat uniforms after 60 washing cycles. The slight color differences between standard fabric and mass-produced combat uniform fabrics were tolerable under quality criteria of Republic of Korea Ministry of National Defense. However, the differences between the military supply contract firms were recognizable to the naked eye and increased with repeated washing. Continuous research on color fastness under repeated washing and color management is required to standardize reliability from each military supply contract firm for the daytime performance of a combat uniform``s camouflage.
아크릴 도전사와 폴리프로필렌 섬유로 된 혼섬 슬라이버를 사용한 전자파 차폐용 복합재료의 새로운 제조 방법
홍성돈(Seong Don Hong),김지훈(Ji Hoon Kim),김영호(Young Ho Kim) 한국고분자학회 2018 폴리머 Vol.42 No.6
플라스틱과 금속을 사용하는 기존 전자파 차폐용 복합소재 제조 시의 무게 증가와 충전재의 배향성을 높이기 어려운 문제점을 해결하기 위하여, 융점이 낮으면서 기계적 성질이 우수한 폴리프로필렌(PP) 섬유와 용융되지 않는 도전성(ec) 아크릴 섬유를 혼합한 혼섬 슬라이버를 제조한 후 이를 용융압착함으로써 간단하면서도 효율적으로 도전성 섬유가 매트릭스 내에 기계방향으로 배향된 전자파 차폐용 복합체를 제조하는 새로운 방법을 개발하였다. ec-아크릴 섬유와 PP 섬유의 혼합 비율을 달리한 혼섬 슬라이버를 준비하고 이로부터 ec-아크릴 섬유/PP 복합체 필름들을 제조한 후 이들의 물성, 표면특성, 전자파 차폐성 등을 분석하였다. 분석 결과, ec-아크릴 섬유는 복합체 내에서 기계 방향으로 배향되어 있으며, ec-아크릴 섬유의 함량을 20%로 하면서 복합필름의 두께를 1.6 ㎜ 정도로 하면 1.0 ㎓ 영역에서 30 ㏈ 이상의 우수한 전자파 차폐효율을 나타내었다. In order to overcome the problems of increasing weight of composites and difficulty of orientation of the fillers in the matrix when plastic matrices and metal fillers were used for electromagnetic interference (EMI) shielding materials, a new simple and effective method was developed to produce EMI shielding composites in which electroconductive (ec-) fiber fillers were oriented to machine direction by using of melt-pressing mixed fiber slivers composed of meltable polypropylene (PP) fibers and non meltable ec-acrylic fibers. Ec-acrylic fiber/PP composite films with various contents of ecacrylic fiber were prepared from the mixed fiber slivers, and their mechanical and surface properties, resistivity, and electromagnetic shielding efficiency (EMSE) were analyzed. Results showed that ec-acrylic fibers were present parallel to machine direction in the composites and that an excellent EMSE of 30 ㏈ at 1 ㎓ was obtained when composite films of 1.6 ㎜ thickness with a 20 wt% ec-acrylic fiber content was used.