ETİLEN OKSİT, OTOKLAV VE ULTRA VİYOLE STERİLİZASYONLARIININ PET ELEKTROÇEKİM LİFLERİN YÜZEY TOPOGRAFİSİ ÜZERİNE ETKİSİ

Abstract

Bu çalışmanın amacı farklı sterilizasyon metodlarının elektroçekim polyester lifleri üzerindeki etkisini incelemektir. PET lifleri; ağırlıkça %10,15 ve 20 oranında polietilen tereftalat (PET) içeren çözeltilerden elektroçekim yöntemiyle üretilmiş ve etilen oksit (EO), otoklav (AU) ve ultraviyole (UV) ile sterilize edilmiştir. Üretilen yüzeylerin yüzey karakterizasyonu taramalı elektron mikroskobu (SEM), atomik kuvvet mikroskobu (AFM), yüzey gözeneklilik boyutu analizleri ve temas açısı ölçümleriyle gerçekleştirilmiştir. Yüzeylerin termal özellikleri Diferansiyel taramalı kalorimetre (DSC) testleri; mikro yapısal özellikleri Fourier Transform Infrared spektroskopisi (FTIR) ile araştırılmıştır. SEM çalışmaları farklı sterilizasyon yöntemlerinin, polimer konsantrasyonuna bağlı olarak büyük değişikliklere neden olduğunu göstermiştir. Artan polimer konsantrasyonu ile yöntemlerin etkileri azalma gösterse de, lif yapısı -özellikle EO sterilizasyonunda oldukça zarar görmüştür. Temas açısı değerlerinde UV sterilizasyonu sonrası büyük düşüş görülmüştür.

Keywords

• Elektroçekim lif,Poliester; Sterilizasyon; Karakterizasyon

Effect Of Ethylene Oxide, Autoclave and Ultra Violet Sterilizations On Surface Topography Of Pet Electrospun Fibers

Abstract

The aim of this study to investigate the effects of different sterilization methods on electrospun polyester. Ethylene oxide (EO), autoclave (AU) and ultraviolet (UV) sterilization methods were applied to electrospun fibers produced from polyethylene terephthalate (PET) solutions with concentrations of 10, 15 and 20 wt.%. The surface characteristics of the fibers were examined by scanning electron microscope (SEM), atomic force microscope (AFM), surface pore size studies and contact angle measurements. Differential scanning calorimetry (DSC) tests were carried out to characterize the thermal properties. Fourier Transform Infrared spectroscopy (FTIR) tests were performed to analyze the micro structural properties. SEM studies showed that different sterilization methods made significant changes on the surfaces of the fibers depending on the PET concentration. Although the effects were decreased with the increasing polymer concentration, the fiber structure was damaged especially with the EO sterilization. The contact angle values were decreased with the UV sterilization method the most.

Keywords

• Electrospun fiber,Polyester; Sterilization; Characterization

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