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아프리카의 탈식민주의 시각으로 본 탈경계 인문학 연구의 한 사례 -조셉 콘라드의 『암흑의 핵심』을 중심으로-
이석호 ( Lee¸ Seakho ) 동국대학교 영어권문화연구소 2009 영어권문화연구 Vol.2 No.2
Postcolonialism is a kind of aesthetics which is reflecting daul perspective in deconstructing the binary opposition of manicheanism - the west/the east, the white/the black, civilization/madness, the modern/the premodern and so on. Compared to that of postmoderninsm whose basic tenets could be acknowledged as quintessential components for the later theories of it, it is not so hard to recognize that the aesthetics of postcolonialism looks much political and subversive in the African context. The ambivalence of postcolonialism is reflected in the works of Joseph Conrad's Heart of Darkness. Heart of Darkness is a well-known canon which is failing to be known as the typical text in terms of imploding the artificially internalized set of value of Europe from within and exploding the boundary system of the west from without which is used as a gauge to distinguish his race from the other's.
고해와 카르복시메틸화의 복합 전처리가 펄프의 특성 및 셀룰로오스 나노피브릴 제조에 미치는 영향
임완희(Wanhee Im),이석호(Seakho Lee),이학래(Hak Lae Lee),윤혜정(Hye Jung Youn) 한국펄프·종이공학회 2017 펄프.종이기술 Vol.49 No.5
Cellulose nanofibrils have a big attraction because of unique properties such as high aspect ratio and specific surface area, high mechanical stiffness, biodegradability, and sustainability. One of limitations associated with the application of cellulose nanofibrils is the high energy demand during a nanofibrillation process. Various pretreatments have been proposed to reduce the energy consumption. In this study, a combined pretreatment of beating and carboxymethylation was investigated as a pretreatment to make the fibrillation easy and to reduce energy consumption. The sequence and severity of the pretreatment were controlled, and pulp properties and nanofibrillation degree were evaluated. The combined pretreatment of carboxymethylation and beating was more effective in terms of energy saving than the single carboxymethylation chemical treatment. However, economic feasibility of the combined pretreatment to produce cellulose nanofibrils should be evaluated in a mill scale.
카르복시메틸화 전처리에 따른 셀룰로오스 나노피브릴의 특성
임완희(Wanhee Im),이석호(Seakho Lee),박현지(Hyeonji Park),이학래(Hak Lae Lee),윤혜정(Hye Jung Youn) 한국펄프·종이공학회 2016 펄프.종이기술 Vol.48 No.6
Cellulose nanofibrils (CNF) are considered prospective material in a sustainable society due to its several technically attractive properties and renewable characteristics. However, the isolation of CNF by mechanical processes still requires high energy consumption. Chemical pretreatment of cellulose may provide an opportunity of decreasing energy consumption for CNF production. In this study, carboxymethylation which introduces carboxyl groups to hydroxyl groups was considered. The carboxyl contents of pulp fibers was greatly affected by chloroacetic acid amount and reaction temperature. Never-dried pulp fibers showed higher carboxyl content than once-dried pulp. The charge properties of pulp fiber such as carboxyl group contents had a strong influence on energy consumption to isolate CNF. As the carboxyl content of pulp fibers increased, the required grinding pass number for the production of cellulose nanofibrils was significantly reduced and the resultant cellulose nanofibrils had smaller and more uniform width.