Proje Grubu: TÜBİTAK MAG ProjeSayfa Sayısı: 0Proje No: 315M018Proje Bitiş Tarihi: 01.09.2018Türkçe

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Elektro-eğirme Yöntemi Kullanılarak Üretilen Naylon-6/Haloysit Nanotüp Nanofiberlerinin Çoklu Fonksiyonel Özelliklerinin Geliştirilmesi
Elektro-eğirme yöntemi günümüz teknolojisinin geliştirilmesinde önemli potansiyele sahip olan yüksek boy/çap oranındaki nanofiberlerinin üretiminde kullanılan oldukça verimli bir yöntemdir. Üretilen fiberlerin nano boyutta olması ve yapıya eklenen katkı malzemesi ile nano düzeyde etkileşime geçmesi kompozit nanofiberlerinin gelecek vaat eden konulardan biri olmasını sağlamaktadır. Bu çalışmada elektro-eğirme yönteminde kullanılan proses parametrelerinin optimize edilerek düzgün Naylon-6 (PA6) nanofiber üretiminin gerçekleştirilmesi ve Haloysit nanotüp (HNT) katkılı PA6 nanofiberlerinin çoklu fonksiyonel özelliklerinin geliştirilmesi amaçlanmıştır. Öncelikle elektro-eğirme parametrelerinden çözelti türü ve konsantrasyonu, elektrik potansiyeli, besleme debisi ve toplama uzaklığı optimizasyonları katkısız PA6 kullanılarak yapılmış ve katkısız fiberlerinin üretiminde seçilen optimum parametreler göz önünde bulundurularak HNT katkılı kompozitler üretilmiştir. HNT katkı miktarının belirlenmesi için ağırlıkça % 1, 2, 4, 6 ve 8 modifiye edilmiş ve edilmemiş HNT içeren kompozitler başarıyla hazırlanarak SEM, TGA, DSC analizleri ve çekme testi ile karakterize edilmiştir. Üretilen nanofiberler termal ve mekanik özellikleri bakımından karşılaştırıldığında, %1 m-HNT eklenmesiyle kompozitlerin çekme dayanımı iyileştirilmiş ancak termal özelliklerinde önemli bir değişim görülmemiştir. Tüm bunlara ek olarak, katkısız, %1 ve 8 modifiye edilmiş HNT katkılı olarak üretilen nanofiberler uçuculukları birbirinden farklı olan HCl, aseton, toluen ve su buharına maruz bırakılarak kimyasal buhara dayanım özellikleri bakımından karakterize edilmiştir. Deneyler sonucunda morfolojik yapıları değişmiş, termal ve mekanik özelliklerinde düşüş görülmüştür. Ancak %1 m-HNT katkısıyla bahsedilen düşüşler bir miktar engellenmiştir. Son olarak basınçlı kalıplama yöntemiyle üretilen filmlerin LOI değeri %27 O2 iken elektroeğirme ile üretilen filmlerin LOI değeri %31 O2 olarak tespit edilmiştir. Bu da üretilen fiberlerin yanmayı geciktirici özellikler üzerine olumlu etkisi olduğunu göstermektedir.
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