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이해수,( Louis Hamenu ),( Latifatumohammed ),( Hu Mengyang ),( Alfred Madzamuse ),( Ji Hyun Nam ),( Kwang Man Kim ),( Jang Myoun Ko ) 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1
Polyaniline (PAn) electrode for a supercapacitor is prepared by electrodepositing on a platinum substrate. Its supercapacitive properties are characterized after adopting acrylic gel polymer electrolytes, such as poly(acrylic acid) (PAA), potassium polyacrylate (PAAK), and poly(2-acrylamido-2-methyl-1-propanesulfonic acid) (PAMPS). The electrodeposited PAn (ePAn) exhibits a network structure compactly connected with particles or particle aggregates to yield a porous morphology with an average pore size of 4 μm. The cyclic voltammogram of the ePAn electrode shows redox pair peaks on both cathodic (around 0.2 V) and anodic scans (around 0.1 V vs. Ag/AgCl) at low scan rates, but the redox peak potentials shift to give a higher potential difference at high scan rates, implying higher polarization. Except for the H<sub>2</sub>O/PAMPS electrolyte, the ePAn supercapacitor that adopts the acrylic gel polymer electrolytes exhibits comparable specific capacitance of 400-500 F g<sup>-1</sup>, even at high scan rates, due to specific interactions between the H<sub>2</sub>SO<sub>4</sub> solvent molecules and acrylic polymers.
이해수,( Louishamenu ),( Latifatumohammed ),( Yeo Il Yoon ),( Alfred Madzamuse ),( Hu Mengyang ),( Jang Myoun Ko ) 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1
Prepared are three types of composite supercapacitor electrode, such as electroactive polyaniline (PAN), PAN/multi-walled carbon nanotube (CNT), and PAN/CNT/RuO<sub>2</sub>. Cyclic voltammetry was performed to investigate the supercapacitive properties of these electrodes in an electrolyte solution of 1.0M H<sub>2</sub>SO<sub>4</sub>. The PAN/CNT/RuO<sub>2</sub> electrode showed the highest specific capacitance at all scan rates (e.g., 441 and 392 F g<sup>-1</sup> at 100 and 1,000 mV s<sup>-1</sup>, respectively). In cycle performance, however, the PAN/CNT electrode demonstrated the best capacitance retention (66%) at 104th cycle.
이해수,윤종운,조정민,김동수,고장면 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0
열접착이 아닌 밀착력이 우수한 표면처리제와 개질화된 접착제만을 이용하여 알루미늄과 폴리프로필렌 필름과의 강한 접착과 내화학성을 형성시킬 수 있는지 알아보았다. 알루미늄 호일은 산성의 크롬계 표면처리제를 이용하여 알루미늄 표면에 형성되어 있는 산화피막을 제거하고, 내식성과 밀착력을 확보하였다. 극성의 알루미늄 호일과 무극성의 폴리프로필렌 필름을 접착하기 위한 강한 접착력 그리고 내화학성이 우수한 접착제는 아크릴고분자와 올레핀 고분자를 포함하는 이액형 접착제들을 이용하여 접착력을 향상을 확인하였다.
이해수,박범수,김형섭,Lee, Haesu,Park, Beomsu,Kim, Hyungsup The Korean Fiber Society 2012 한국섬유공학회지 Vol.49 No.3
Polyacrylonitrile (PAN) fiber web was manufactured via electrospinning. The applied voltages were controlled at 20 and 25 kV during the electrospinning. In order to study the influences of the applied voltage and the collection area on the diameter and the crystallinity of the resulting fiber, specimens were obtained at the centers and boundaries of the collected web and characterized using SEM and XRD. The applied voltage showed a significant effect on the crystallinity, which increased with the applied voltage. Regardless of the applied voltage, the crystallinity of the fiber collected at the center showed higher values than the one in the boundary. The changes in the crystallinity can be attributed to the strength of the attractive force between the spinline and the collector, and the vaporization of the solvent from the spinline.