ELEKTİRİK AKIMININ ELEKTROSPUN POLIMER JETI UZERİNDEKİ ETKİSİ

Yıl 2015, Cilt: 25 Sayı: 3, 201 - 206, 01.12.2015

Fatma Yalçınkaya

Öz

Sistem ve işlem parametreleri elektro lif çekim yöntemiyle oluşturulmuş boncuksuz ve ince çaplı nanolifler üzerinde büyük rol oynamaktadır. Bu çalışmada sistem ve işlem parametrelerinin polyvinyl butiral (PVB) nanolifler üzerindeki etkisi çalışılmıştır. PVB nanolifleri elektro lif çekim yöntemi uygulanarak üretilmiştir. Farklı voltaj ve besleme hızı kullanarak jet üzerindeki akim ölçülmüştür. Uygulanan voltaj ve besleme hızının jet rejimlerinin (örn. Sabit jet, dalgalı jet ve polimer damlamalı sabit jet) oluşumda rol alan akimi etkilediği gözlemlenmiştir. Nanoliflerin morfolojisi her rejimde farklılık göstermiştir. Dahası iletkenliğin jet akimi ve farklı jet rejimleri üzerindeki etkisi incelenmiştir. Deneysel şartların sonucu olarak toplanan nanoliflerin özellikleri kıyaslanmıştır. Akim testi bocuksuz nanolif yüzeyinin tayini için kullanılmıştır

Anahtar Kelimeler

PVB, akim, elektro lif çekim yöntemi, nanolif, voltaj

EFFECT OF CURRENT ON POLYMER JET IN ELECTROSPINNING PROCESS

Öz

System and process parameters play a major role in the production of fine bead free electrospun nanofibers. In this study, the influence of the system and process parameters were observed during the production of polyvinyl butyral (PVB) nanofibers. PVB nanofibers were produced by a needle electrospinning system. The voltage and feed rate of the system was varied to observe its effect on the electric current applied to a polymer jet. It was observed that the applied voltage and flow rate utilized on the polyvinyl butyral polymer solution affected the electric current’s influence on the jet regimes (e.g. stable jet, fluctuated jet and stable jet with polymer drops). Nanofiber morphology showed the differences in fiber quality for each parameter. Additionally, the effect of conductivity on current and various jet regimes was examined. The properties of each of the samples were compared as parameters of the spinneret were varied in each experiment. The current test was used to determine if the surface morphology of the nanofiber was beadless

Anahtar Kelimeler

PVB, current, electrospinning, nanofiber, voltage

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