ÇEVRESEL PARAMETRELERİN ELEKTROSPİN YÖNTEMİYLE ÜRETİLMİŞ POLİTRİMETİLEN TEREFTALAT LİFLERİNİN MORFOLOJİSİ ÜZERİNDEKİ ETKİLERİ

Bu çalışmada bağıl nemin ve ortam sıcaklığının elektrospin tekniğiyle üretilen politrimetilen tereftalat (PTT) liflerinin morfolojileri üzerindeki etkileri incelenmiştir. Bununla birlikte bu çevresel parametrelerin; birim yük, toplayıcı-iğne ucu arası mesafe ve debi gibi önemli proses parametreleriyle etkileşimleri de incelenmiştir. Çözücü olarak diklormetan (DCM) ve triflor asetikasit karışımı kullanılmıştır. Elektrospin yöntemiyle üretilen PTT liflerinin yüzey morfolojileri ve ortalama çaplarının analizi için alan emisyonlu taramalı elektron mikroskobu (FESEM) kullanılmıştır. Elde edilen sonuçlara göre incelenen her üç proses parametresi (birim yük, toplayıcı-iğne ucu arası mesafe ve debi) için hem bağıl nemin hem de sıcaklığın artması elektrospin tekniğiyle üretilen PTT liflerinin ortalama çaplarını azaltmaktadır. En yüksek azalma oranı 0.9 ml/sa debide bağıl nemin 30%’dan 70%’e çıkmasında görülmüştür. Tüm bağıl nem ve tüm sıcaklık değerleri için elektrospin tekniğiyle üretilen PTT liflerinin hepsinin dairesel yapıda, düzgün yüzeyli ve boncuksuz olduğu görülmüştür.

Anahtar Kelimeler:

Elektrospin, Politrimetilen tereftalat, Morfoloji, Sıcaklık, Bağıl Nem, Proses parametreleri

EFFECT OF AMBIENT PARAMETERS ON MORPHOLOGY OF ELECTROSPUN POLY (TRIMETHYLENE TEREPHTHALATE) (PTT) FIBERS

In this study, the effect of relative humidity and temperature on the morphology of electrospun Poly(trimethylene terephthalate) (PTT) fibers is investigated. It is also examined the interaction between these ambient parameters and those of some important parameters such as charge density, tip to collector distance and flow rate. Dichloromethane (DCM) and trifluoroacetic acid (TFA) solvent mixture is used. Field emission scanning electron microscopy (FESEM) is used for determination of surface morphologies and average diameters of electrospun PTT fibers. The results show that average diameter of electrospun PTT fibers decreases with increasing of relative humidity and temperature values for all of the charge density, tip to collector distance and flow rate values. The highest rate of decrease is seen at 0.9 ml/h for increasing of RH from 30% to 70%. All of the obtained electrospun PTT fibers are circular shaped with smooth surface without bead formation for all RH and temperature values.

Keywords:

Electrospinning, Polytrimethylene terephthalate, Morphology, Ambient temperature, Relative humidity, Process parameters,

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