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Dual Wrinkling on Blended Polymer Microparticles
유동익,임진솔,조국영 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.1
최근들어 고분자미립자 표면몰폴로지 제어에 대한 관심이 증대되고 있다. 이는 antifouling, 모방방지 fingerprint 등과 같은 새로운 분야로의 응용이 가능하기 때문이다. 표면에 주름을 갖는 미립자는 몰폴로지가 제어된 미립자에 대표적인 예이다. 그러나 제조상의 어려움으로 인해 표면에 주름을 갖는 미립자의 제조방법은 매우 제한되어있다. 본 연구에서는 생분해성 고분자 블랜드를 기반으로 하는 미립자에 두가지 서로 다른 메커니즘을 이용하여 동시에 이중주름형태를 제조하는 방법을 설명한다. 특히 균일한 입자를 제조하기 위하여 microfluidic 제조법을 사용 하였고, 현미경, AFM 그리고 SEM을 통하여 표면 몰폴로지를 관찰하였다. 또한 점도와 계면에너지 측정을 통해 주름생성에 대하여 고찰하였다. 본 연구를 통하여 새로운 주름진 표면을 갖는 미립자의 제조방법을 제시한다.
버나드 맬라무드의 The Fixer : 고통을 위한 구원 Salvation Though Suffering
김광선,유동익 명지대학교 인문과학연구소 1999 인문과학연구논총 Vol.20 No.-
Bernard Malamud handles the Jaw as a symbol of the tragic experience of man existentially. He tries to see the Jew as universal man. Thus he sees the Jews as exemplars of the injustices that eventually affect all human beings. He also sees suffering as something that all humans must face. The Fixer concerns the fate of Yakov a poor Jew in Tsarist Russia who undergoes great suffering during two-and-a-half years in prison. Malamud focused on Bok's thoughts, his experiences in his cell and salvation through suffering as a moral human being. After imprisonment, Yakov learned the central condition of existence-that life could be better that it is, and that the only way to improve the quality of life is for all persons to strive for good will among men, to be reasonable. The implied lesson is quite simply, that people can change. Their circumstances may remain the but spiritually they transcend their surroundings. Out of the everyday defeats and indignities of ordinary people, Malamud creates beautiful parables that capture the joy as well as the pain of life; he expresses the dignity of the human spirit searching for through suffering and the existential anguish of life in our time.
안진혁,유동익,조국영 한국공업화학회 2017 한국공업화학회 연구논문 초록집 Vol.2017 No.1
Recently, the high energy and power density LIB is demanded for applications such as electrical vehicles(EVs) and energy storage systems(ESS). LiFePO4 is one of the promising cathode materials for the high performance LIB, because of its high theorithical capacity (170mA h g-1), cycle stability, and low cost. However, it is limited to high power LIB, beacuse of intrinsic electric and ionic conductivity. Many studies have been reported to overcome this porbles by using nanoscale particles, carbon coating, surface coating with organic/inorganic materials on the particle scale for high conductivity. Nevertheless, the resulting decrease in the volumetric capacity and the complexity of the required manufacturing conditions are problematic for a particle-scale coating techniques. Here, we report a facile alternative way to conformal conductive poly(3,4-ethylenedioxythiophene) (PEDOT) through vapour reaction printing (VRP) on as-prepared electrodes.