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폴리비닐알콜/셀룰로오스 트리아세테이트 전기방사 섬유 이중층에 의한 종이 강도 보강
정은수(Eunsue Jeong),신성철(Sungchul Shin),이제곤(Jegon Lee),윤혜정(Hye Jung Youn),현진호(Jinho Hyun) 한국펄프·종이공학회 2018 펄프.종이技術 Vol.50 No.4
Polyvinyl alcohol (PVA) and cellulose triacetate (CTA) polymer solutions were electrospun to form nanofibers and microfibers, respectively. The bilayer of nano/micro fibers was prepared by electrospinning PVA nanofibers on the paper followed by electrospinning CTA microfibers on the top of a PVA nanofiber layer. The structure of electrospun fibers was observed by FE-SEM and mechanical properties of electrospun layers and bilayers were characterized to investigate split resistance, tensile index, folding endurance, and reversible preservability. The strength of damaged paper could be restored by applying the PVA nanofiber/CTA microfiber bilayer to paper and the nano/micro bilayer was easily detached by the exposure to moisture for a short period of time.
인공 노화 종이에 전기방사된 폴리비닐알콜/셀룰로오스 트리아세테이트 섬유의 종이 보강 효과
정은수(Eunsue Jeong),신성철(Sungchul Shin),윤혜정(Hye Jung Youn),현진호(Jinho Hyun) 한국펄프·종이공학회 2018 펄프.종이技術 Vol.50 No.5
In this research, we tried to reinforce artificially aged paper by introducing polyvinyl alcohol (PVA)/cellulose triacetate (CTA) double layers through electrospinning. The electrospinning conditions of PVA and CTA were established, and the morphological features of the electrospun fibers were observed by scanning electron microscopy. The aged paper showed the decrease of tensile strength and the folding endurance, but the mechanical properties were effectively increased by the introduction of the electrospun layers. The electrospinning of polymers formed a stable and fibrous reinforcing layer at the paper surface without the use of liquid adhesives. It would be advantageous in the conservation protocol because it could minimize the inevitable deformation of paper in the drying process or contamination by the additive materials.
알지네이트를 이용한 셀룰로오스 하이드로겔의 투과 특성 제어
정은수(Eunsue Jeong),신성철(Sungchul Shin),박민성(Minsung Park),현진호(Jinho Hyun) 한국펄프·종이공학회 2015 펄프.종이기술 Vol.47 No.2
Natural cellulose hydrogel membrane cannot be directly used for cell encapsulation because it has many large pores on the surface that immune biomolecules are able to penetrate into easily. For the reason, alginate was used for the control of pore size of the cellulose hydrogel membrane. The surface morphology of cellulose/alginate nanocomposite confirmed the successful control of the porosity of the membrane. The permeability of the cellulose/alginate nanocomposite was decreased but mechanical properties were increased compared with the bacterial cellulose membrane. The cellulose/alginate nanocomposite could be used for the functional membrane as a promising biomedical material in the future.
진희정(Hee-Jeong Jin),이재철(JaeChul Lee),장은수(Eunsu Jang) 한국콘텐츠학회 2014 한국콘텐츠학회논문지 Vol.14 No.12
본 연구는 네트워크 분석을 통해 국내 ‘변증’ 연구의 동향을 살펴보기 위한 것이다. 분석은 년간 논문 수, 저널별 논문 수, 연구 분류별 논문 수 등을 살펴보았으며, 네트워크 분석은 키워드 쌍을 사용하여 수행하였다. OASIS(Oriental Medicine Advanced Searching Integrated System) 시스템에서 검색한 810건의 논문 중에서 368건의 논문을 분석에 사용하였다. 결과적으로, 최근 10년간 변증 관련 논문은 증가하였으며, “Korean journal of oriental physiology & pathology” 저널과 “Journal of korean oriental internal medicine” 저널이 변증관련 가장 많은 논문을 출판하였다. 연구 분류별로 살펴보면, 단면연구가 144편으로 가장 많았고, 환자 사례보고가 71편이었다. 무작위임상시험의 경우에는 단지 3편의 논문만이 있었다. 변증연구에서는 troke, pattern analysis, blood stasis 키워드가 많이 주요 네트워크를 이루었다. This study aims to analyze Koreas trend of ‘pattern identification(PI)’ research using network analysis. We selected 368 papers from OASIS (Oriental Medicine Advanced Searching Integrated System) by review of two Korean medicine experts. Network analysis between keyword of PI studies were performed. As a result, number of PI studies has increased over the last 10 years. Korean journal of oriental physiology and pathology and Journal of Korean oriental internal medicine have published most papers related to PI. As research category, there are 144 papers in the cross-sectional study, and 71 papers in case report study. In the case of randomized clinical trials, there are only 3 papers. In studies for PI, stroke, pattern analysis, and blood stasis were the keywords make up the main network.