Hülya KESİCİ GÜLER, Funda CENGİZ ÇALLIOĞLU

Emülsiyon elektro lif çekim yöntemi ile uçucu yağ esaslı kompozit nanoliflerin üretimi

Bu çalışmada, su içinde yağ emülsiyon elektro lif çekimi ilepolivinilpirolidon (PVP)/jelatin (GEL)/lavanta uçucu yağ (LEO) esaslınanolif üretilmesi amaçlanmıştır. Öncelikle; polimer çözeltiözelliklerinin ölçümü ve daha sonra nanolif üretim optimizasyonu venanolifli ağ yapının karakterizasyonu gerçekleştirilmiştir. PVPçözeltisine jelatin ilavesi ile viskozite artar iken, iletkenlik ve yüzeygerilimi azalmaktadır. Nano ağ kalitesi, lif çapı, çap üniformitesi vejelatin içeriği bakımından PVP/GEL (50/50) optimum numune olarakbelirlenmiştir. Çeşitli konsantrasyonlarda LEO içeren PVP/GEL(50/50)’den nanolif üretimine devam edilmiştir. FT-IR sonuçları,nanoliflerin kimyasal yapısında LEO, PVP ve jelatin varlığınıdoğrulamıştır. Saf PVP ve %8 LEO içeren PVP/GEL (50/50) hariç,genellikle oldukça ince ve üniform nanolifler elde edilmiştir. En incelifler PVP/GEL (100/0) (183 nm) çözeltisinden ve en üniform liflerPVP/GEL (50/50) (1.04 lif çapı üniformite katsayısı) çözeltisinden eldeedilmiştir. Tüm nanolif numunelerinin histogramında tek tepeli dağılımeğrileri elde edilmiştir. Jelatin ilavesi, çözelti özelliklerini ve ortalama lifçapını istatistiksel olarak etkilemiştir fakat LEO ilavesi lif özelliklerinietkilememiştir.

Production of essential oil-based composite nanofibers by emulsionelectrospinning

Abstract ÖzThis study aimed to produce polyvinylpyrrolidone (PVP)/gelatin (GEL)/lavender essential oil (LEO)-based nanofibers by means of oil-inwater emulsion electrospinning. Firstly, the polymer solution properties were measured, and then optimization of nanofiber production and characterization of the nanofibrous web were carried out. As gelatin was added to the PVP solution, viscosity was found to increase while surface tension and conductivity decreased. PVP/GEL (50/50) was determined to be the optimum sample in terms of nanoweb quality, fiber diameter, diameter uniformity, and gelatin content. Nanofiber production proceeded with PVP/GEL (50/50) and various concentrations of LEO. FT-IR results confirmed that LEO, PVP, and gelatin were incorporated in the chemical structure of the nanofibers. Generally, ultra-fine and uniform nanofibers were obtained, except when using pure PVP or PVP/GEL (50/50) including 8 wt % LEO. The finest fibers were obtained from PVP/GEL (100/0) (183 nm), and the most uniform fibers were obtained from PVP/GEL (50/50) (fiber diameter uniformity coefficient of 1.04). All nanofiber samples displayed unimodal distribution curves of histograms. While the addition of gelatin affected solution properties and average fiber diameter, the addition of LEO did not affect fiber properties.

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