Properties of poly(2-ethyl aniline)/graphene oxide (PEAn/GO) nanocomposites: influence of a synthesis method and polymerization time

Yıl 2025, Cilt: 5 Sayı: 1, 386 - 398, 31.01.2025

Duygu Anaklı

https://doi.org/10.61112/jiens.1602161

Öz

In this work, the in situ polymerization of 2-ethyl aniline (2-EAn) in the presence of graphene oxide (GO) as an oxidant was carried out to synthesize conductive GO–poly(2-ethyl aniline) (PEAn) nanocomposites (GO-g-PEAn). GO-assisted GO-PEAn composite (GO-g-PEAn) refers to the chemical bonding and crystallisation of PEAn with a unique structure. The three different polymerization times, 48 h, 120 h and 240 h, were applied to analyze the effect of the reaction time on the polymerization of the composites. GO-PEAn nanocomposites were also synthesized by in situ polymerization of 2-EAn with the oxidant ammonium persulfate (APS), termed APS-GO-PEAn. GO-g-PEAn nanocomposites prepared at 120 h (5-day GO-g-PEAn) were selected as the most suitable composite based on evaluation of both scanning electron imaging and electrical conductivity characterization results. The 5-day GO-g-PEAn nanocomposites were compared with APS-GO-PEAn nanocomposites using X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis. The Fourier Transform Infrared (FTIR) spectrum confirmed the polymerisation of 2-ethyl aniline in the absence of conventional oxidants such as ammonium persulfate, potassium dichromate and potassium permanganate. XRD patterns indicate the presence of a crystalline phase of PEAn, resulting in higher conductivity in GO-g-PEAn nanocomposites than in APS-GO-PEAn nanocomposites. GO-g-PEAn nanocomposites showed promising conditions for their use as an electromagnetic interference (EMI) shielding materials.

Anahtar Kelimeler

graphene oxide, poly (2-ethyl aniline), nanocomposite, polymerization, electrical conductivity

Proje Numarası

Sivas Cumhuriyet University Scientific Research Project (CUBAP), project number M-2021-820

Teşekkür

I would like to thank Assoc. Prof. Dr. İsrafil KÜÇÜK who provided valuable support during the study.

Poli(2-etil anilin)/grafen oksit (PEAn/GO) nanokompozitlerinin özellikleri: sentez yöntemi ve polimerizasyon süresinin etkisi

Öz

Bu çalışmada, iletken grafen oksit (GO)-poli(2-etil anilin) ​​(PEAn) nanokompozit (GO-g-PEAn) sentezi, GO'nun oksidant olarak varlığında 2-etil anilin (2-EAn)'in yerinde polimerizasyonuyla gerçekleştirilmiştir. Kompozitlerin polimerizasyonu üzerinde reaksiyon süresinin etkisini analiz etmek için 48 saat, 120 saat ve 240 saat olmak üzere üç farklı polimerizasyon süresi uygulanmıştır. GO-PEAn nanokompozitleri ayrıca 2-EAn'in oksidant amonyum persülfat (APS) ile yerinde polimerizasyonuyla APS-GO-PEAn olarak adlandırılan nanokompozitleri şeklinde sentezlenmiştir. 120 saatte hazırlanan GO-g-PEAn nanokompozitleri (5 günlük GO-g-PEAn), hem SEM analizine hem de elektriksel iletkenlik verilerine dayanarak en uygun kompozit olarak seçilmiştir. 5 günlük GO-g-PEAn nanokompozitleri, X-ışını kırınımı (XRD) ve taramalı elektron mikroskobu (SEM) analizi kullanılarak APS-GO-PEAn nanokompozitleriyle karşılaştırılmıştır. Fourier Dönüşümlü Kızılötesi (FTIR) spektrumu, geleneksel oksidanların yokluğunda 2-etil anilinin polimerizasyon yaptığını doğrulamıştır. XRD desenleri, PEAn'ın kristalin bir fazının varlığını göstermektedir ve bu da GO-g-PEAn nanokompozitlerinde APS-GO-PEAn nanokompozitlerinden daha yüksek iletkenlikle sonuçlanmıştır. GO-g-PEAn nanokompozitleri, elektromanyetik girişim (EMI) kalkanlama malzemeleri olarak kullanımları için ümit verici koşullar göstermiştir.

Anahtar Kelimeler

grafen oksit, poli(2-etil anilin), nanokompozit, polimerizasyon

Proje Numarası

Sivas Cumhuriyet University Scientific Research Project (CUBAP), project number M-2021-820

Kaynakça

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