Nuray UCAR, Olcay EREN, Aysen ONEN, Nuray KIZILDAG, Nesrin DEMIRSOY, İsmail KARACAN

POLİANİLİN VE AMİN FONKSİYONEL GRUPLU KARBON NANOTÜPLERİN KOMPOZİT NANOLİF ÖZELLİKLERİNE ETKİSİ

Polianilin (PANI) gibi iletken polimerlerin ve karbon nanotüp (CNT) gibi iletken nano partiküllerin kompozit ürün üzerinde oldukça önemli etkileri mevcuttur. Şu ana kadar gerçekleştirilen nano polimer kompozit çalışmalarda ya sadece PANI ya da sadece CNT kullanılmıştır. Hem PANI hem de CNT’nin bir arada kullanıldığı, kısaca her iki malzemenin sinerjik etkisini kompozit ürün üzerinde analiz etme ile ilgili henüz bir çalışma literatürde mevcut değildir. Böylece, bu çalışmada ilk kez, PANI ve CNT beraber polimer matriks (poliakrilonitril, PAN) içerisinde dağıtılarak kompozit nanolif ağı üretilmiştir. PANI’in, CNT’e kıyasla nanolif çapını daha yüksek oranda arttırdığı görülmüştür. Katkı malzeme miktarı ve tipi arttıkça, polimer matriks içinde topaklanma riski daha çok artmaktadır. Bununla birlikte, kompozit yapı içinde %1 CNT, %3 PANI ihtiva eden ürün, %100 PAN ve diğer kompozit numunelere kıyasla daha yüksek kopma mukavemetine sahip olmuştur. Normalde yalıtkan bir malzeme olan PAN, bu çalışmada kullanılan katkı malzemeleri ile antisatik malzeme özelliğini kazanmıştır. Bununla birlikte katkı malzeme tipinin değişmesi ve oranlarının artması iletkenliği çok fazla değiştirmemiştir. PANI ve CNT mevcudiyeti ile PAN polimerinin kristalinitesi artmıştır. PANI sebebi ile siklizasyon sıcaklığı artarken, entalpi düşmüş, CNT sebebi ile hem siklizasyon sıcaklığı hem de entalpi yükselmiştir

Anahtar Kelimeler:

Fonksiyonlanmış karbon nanotüp, Poliakrilonitril, Polianilin, Elektrospining, Nanolif

THE EFFECT OF POLYANILINE AND AMINE FUNCTIONALIZED CARBON NANOTUBES ON THE PROPERTIES OF COMPOSITE NANOFIBER WEB

Conductive polymers such as PANI and conductive nanoparticles such as CNTs have very important effects on the polymer matrix. Although there are many studies carried out for just only PANI filler or carried out for just only CNT filler, there are no studies performed to see the synergistic effects of both PANI and functionalized CNTs on polymer matrix. Thus in this study, for the first time, PANI together with CNTs has been used as a filler for polymer matrix, polyacrylonitrile. It has been seen that the diameters of nanofibers increase due to presence of PANI and CNTs and the effect of PANI on the increase in diameter is higher than that of CNTs. An increase in filler content results in an increase in agglomeration risk which degrades the properties of composite nanofiber web. However, higher breaking strength is obtained for the composite nanofiber with 1% CNT and 3% PANI. Insulator PAN became an antistatic material (static dissipative material) by the presence of CNT and PANI. However, an increase in filler content did not increase the electrical conductivity. This may be due to the agglomeration and void formation around the filler which destroy the network leading to the decrease in conductivity. Presence of PANI and CNT increases the crystallinity of PAN. The crystallinity of composite nanofiber with both of CNT and PANI is higher than that of pure PAN nanofiber, nanofiber with PAN, CNT and nanofiber with PAN, PANI. PANI increases the cyclization temperature and decreases the enthalpy; however CNT has a tendency to increase both the cyclization temperature and the enthalpy. When both of them (CNT and PANI) are present in high amount (3%), then both cyclization temperature and enthalpy decrease

Keywords:

Functionalized carbon nanotube, Polyacrylonitrile, Polyaniline, Electrospinning, Nanofiber,

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