Document Details

Document Type : Thesis 
Document Title :
New Graphene/Carbon Nanotubes Polymers Nanocomposites For Different Applications
كمبوزيت البوليمرات مع الجرافين/أنابيب الكربون النانونيه المتناهية الصغر الجديدة من أجل تطبيقات مختلفة
 
Subject : Faculty of Sciences 
Document Language : Arabic 
Abstract : In recent years uncountable efforts worldwide are addressing all aspects of the rapid developing of nanocomposites (NCs). Nanofillers also play an important role in this field and become the key technique in the nanocomposite process. Carbon nanotubes (CNTs) and graphene (G) play an important role as reinforcement in variable composite materials for different applications. The objective of this study is to fabricate different composite materials based on G/CNTs mixed ratios as nanofillers throughout three different polymer matrices which include polyaniline (PANI), poly(methyl methacrylate) (PMMA) and polyethylene glycol (PEG) for variable applications. The fabricated materials are characterized and identified by common characterization techniques which include: Fourier transform-infrared spectroscopy, X-ray diffraction analysis, thermal analyses, field emission-scanning electron microscopy, Transmission electron microscopy and electrical conductivity study. Such characterizations suggested that PNCs are successfully synthesized. The present work is divided into three parts. The first part aimed to fabricate two new categories from PANI/G/CNTs by in situ polymerization process in acidic aqueous solution. The first category is based on different mixed ratios of G/CNTs while the second category is based on a fixed mixture of G/CNTs (40/60 %) of different loading. The dispersion state of G/CNTs in the PANI matrix has a decisive effect on conductivity in the two categories from PANI/G/CNTs. Furthermore, we investigate PANI/G/CNTs as chemical sensor that has a fast response to selective 4-amino phenol. The nanocomposites are assembled onto flat-silver electrode and employed current-voltage (I-V) technique for potential sensing applications. The second part is aimed to fabricate a new class of PMMA/G/CNTs nanocomposites by simple dissolution method. Methanol chemical sensor is successfully fabricated based on such new composite materials. The composites are immobilized on glassy carbon electrodes to investigate its chemical sensing behavior toward methanol by simple I–V technique. More particularly, the third part is mainly aimed to fabricate another class of PEG/G/CNTs nanocomposites by simple dissolution method. The selectivity of such materials is investigated toward different metal ions by inductively coupled plasma-optical emission spectroscopy (ICP-OES). The electrical performance showed an optimum response at pH = 1 and good selectivity toward Au(III) compared to other metal ions interference. 
Supervisor : Dr. Mahmoud Ali. Hussein 
Thesis Type : Master Thesis 
Publishing Year : 1438 AH
2017 AD 
Added Date : Wednesday, April 5, 2017 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
فاتن محمد الشهريAlShehri, Faten MohammedResearcherMaster 

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