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Nano-SiO<sub>2</sub> 복합에 의한 바이오매스 기반 폴리우레탄 무공형 멤브레인 필름의 투습성 향상에 관한 연구
강승구,최현진,김진미,이승재,박종성,권오경,민병길,Kang, Seung-Gu,Choi, Hyeon-jin,Kim, Jinmi,Lee, Seungjae,Park, Jong Sung,Kwon, Oh Kyung,Min, Byung Gil 한국섬유공학회 2015 한국섬유공학회지 Vol.52 No.2
The aim of this work was to enhance water vapor permeability of bio-polyurethane thin films, which is essential in non-microporous-type films for applications in breathable fabrics, by hybridizing with silica particles. As the bio-polyurethane, which was synthesized using biomass-based $Susterra^{(R)}$ 1,3-propanediol, did not have enough hydrophilicity for a breathable film, the hybridizing effect of hydrophilic nano- or micro-sized silica ($SiO_2$) on the breathability of bio-polyurethane thin films was investigated by measuring the water contact angle and water vapor permeability of the films. It was found that the permeability of the bio-polyurethane film could be significantly enhanced by hybridizing with $nano-SiO_2$ as well as $micro-SiO_2$. It was also observed that the $nano-SiO_2$ was more effective than the $micro-SiO_2$ in improving permeability. It was found that permeability in bio-polyurethane film could be improved up to more than 100% with $nano-SiO_2$ content at 9 wt%.
왕새매 Butastur indicus의 번식 기록 보고
강승구(Seung-Gu Kang),허위행(Wee-Haeng Hur),최유성(Yu-Seong Choi),손종성(Jong-Seong Son),한상훈(Sang-Hoon Han),김성현(Sung-Hyun Kim),이진희(Jin-Hee Yi) 한국조류학회II 2012 한국조류학회지 Vol.19 No.4
2012년 6월 14일 충청북도 충주시 엄정면 일대에서 왕새매의 번식둥지 1개소를 확인하였다. 본 종은 국내에는 1948년(Wolfe 1950) 경기도 안양, 1968년(원병오 1981) 비무장지대(DMZ) 부근 등 2회의 번식기록이 있으나, 그 후 오랜 기간 동안 구체적인 번식기록이 없으므로, 최근의 번식 현황을 파악하는데 참고가 될 것으로 사료되어 보고하고자 한다. On 14 June 2012, a breeding nest of Grey-faced Buzzard (Butastur indicus) was observed at Eomjeongmyeon, Chungju, Chungcheongbukdo. This new breeding record has been a long time in this species, since two breeding events in 1948 and 1968 were recorded in Korea. Consequently, this report presents the breeding status of this species in recent years.