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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.
주름의 주관적 평가요소와 이미지분석법을 통해 얻은 인자의 비교
신은호,박범수,서문호,김형섭,홍석기,장재원,Shin, Eun Ho,Park, Beomsu,Seo, Moon Ho,Kim, Hyungsup,Hong, Sogkie,Jang, Jaewon 한국섬유공학회 2013 한국섬유공학회지 Vol.50 No.1
Most researches on the objective evaluation of fabric wrinkle have ignored that are really important parameters in subjective evaluation using standard replicas. This research has been conducted to find the important parameters in subjective evaluation. In this research, the number and depth of wrinkle were found to be the important parameters. The number of wrinkle was calculated from the ridge density and the distribution of distance between ridges. The depth of wrinkle was calculated from shade length distribution using image analysis. The results showed strong non-linear relationships with those of subjective evaluation.