Çevreci Çözücüler ile Polivinilpirolidon Nanolif Üretimi

Bu çalışmada, çevreci elektro lif çekimi yaklaşımı ile ultra saf su, gül suyu, lavanta suyu, etanol, asetik asit ve aseton gibi farklı çevreci çözücüler ile biyouyumlu polivinilpirolidon (PVP) nanoliflerin üretiminin gerçekleştirilmiştir. Polimer çözeltiler iletkenlik, yüzey gerilimi ve viskozite ölçümleri ile karakterize edilmiştir. Morfolojik analizler Taramalı Elektron Mikroskopu (SEM) ile gerçekleştirilmiştir. PVP/ultra saf su, gül suyu ve lavanta suyu çözeltilerinin iletkenlik, yüzey gerilimi ve viskozite sonuçları; benzer iken PVP/ asetik asit çözeltisi en yüksek viskoziteye ve en düşük iletkenlik değerlerine sahiptir. Diğer taraftan PVP/etanol çözeltisi en düşük yüzey gerilimine sahiptir. En düşük ortalama lif çapı; ultra saf su, gül suyu ve lavanta suyu ile elde edilmiştir fakat boncuklu lifler gözlenmiştir. En düzgün nanolifler PVP/etanol çözeltisinden elde edilirken, ortalama lif çapının 724 nm civarında, diğer PVP çözeltilerden daha kalın olduğu gözlenmiştir. Bu nedenle çalışmanın diğer kısmında lif morfolojisini geliştirmek için etanol yardımcı çözücü olarak seçilmiştir. Ayrıca, çözelti iletkenliği, lif çapı ve nanolifli yüzey çapı arasında ilişki olduğu tespit edilmiş ve iletkenlik arttıkça, lif çapının azaldığı, nanolifli yüzey çapının ise arttığı belirlenmiştir.

Anahtar Kelimeler:

Gül suyu, Lavanta suyu, Polivinilpirolidon, Çevreci çözücü, Çevreci elektro lif çekim yöntemi, Nanolif

Fabrication of Polyvinylpyrrolidone Nanofibers with Green Solvents

In this study, biocompatible Polyvinylpyrrolidone (PVP) nanofibers were produced with ultra-pure water, rose water, lavender water, ethanol, acetone and acetic acid with green electrospinning approach. Polymer solutions were characterized with conductivity, surface tension and viscosity measurements. Morphological analyzes were carried out with Scanning Electron Microscope (SEM). Conductivity, surface tension and viscosity results of PVP/ ultra-pure water, rose water and lavender water solutions were similar. On the other hand, PVP/acetic acid solution has the highest viscosity and lowest conductivity values and PVP/ethanol solution has got the lowest surface tension. In addition; the lowest average fiber diameters were obtained from ultra-pure water, rose water and lavender water solvents but there are some beads on the nanofiber structure. The smoothest nanofibers without beads were obtained from PVP/ethanol but it was observed that average fiber diameter is about 724 nm higher than other PVP solutions. Therefore, ethanol was chosen as a co-solvent to enhance fiber morphology for second part of study. Moreover; the relation between solution conductivity, nanofiber diameter and web diameter were determined and it was found that nanofibrous surface diameter increases and fiber diameter decreases with the increase of solution conductivity.

Keywords:

Rose water, Lavender water, Green electrospinning, Polyvinylpyrrolidone, Green Solvent, Nanofiber,

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