Characterization of Nanocomposite Membranes

2015 ◽  
pp. 89-118
Keyword(s):  
Nanocomposite Membranes

Morphological and Thermal Characterization of Nafion/CNT/PVA Nanocomposite Membranes

2017 ◽  
Vol 729 ◽  
pp. 68-74 ◽  
Author(s):  
Young Ho Kim ◽  
Yeon Kyung Lee ◽  
Bong Keun Kang ◽  
Hee Jin Kim ◽  
Sang June Choi
Keyword(s):  
Thermal Characterization ◽  
Solution Casting ◽  
Nanocomposite Membranes ◽  
Scanning Calorimetry ◽  
Functionalized Carbon Nanotubes ◽  
Pristine Cnts ◽  
Nafion Membranes ◽  
Inorganic Nanomaterials ◽  
Exchange Membrane

Nafion membranes were reinforced by adding functionalized carbon nanotubes (CNTs) such as oxidized CNTs (ox-CNTs). To enhance the ox-CNTs’ miscibility in the Nafion membrane, a small amount of polyvinyl alcohol (PVA) was introduced during the fabrication of some of the nanocomposite membranes. Nafion, a sulfonated tetrafluoroethylene-based fluoropolymer-copolymer, can be used as an ion-exchange membrane in various nanobio-devices. However, some physical properties of Nafion membranes, including the thermal stability, need to be enhanced by adding rigid inorganic nanomaterials such as CNTs or silicates.In this study, PVA-reinforced Nafion membranes with either pristine CNTs (p-CNTs) or ox-CNTs (Nafion/CNT/PVA) were prepared by solution casting. The prepared Nafion/CNT/PVA nanocomposite membranes were approximately 90 μm thick, and their morphologies were characterized by microscopy. Their thermal properties were investigated by differential scanning calorimetry and thermogravimetric analysis.

scholarly journals Fabrication and Characterization of Magnetoresponsive Electrospun Nanocomposite Membranes Based on Methacrylic Random Copolymers and Magnetite Nanoparticles

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Ioanna Savva ◽  
George Krekos ◽  
Alina Taculescu ◽  
Oana Marinica ◽  
Ladislau Vekas ◽  
...  
Keyword(s):  
Random Copolymers ◽  
Magnetic Characteristics ◽  
Stimuli Responsive ◽  
Nanocomposite Membranes ◽  
Electrospinning Technique ◽  
Responsive Materials ◽  
Fibrous Matrix ◽  
Fabrication And Characterization ◽  
Fibrous Membranes

Magnetoresponsive polymer-based fibrous nanocomposites belonging to the broad category of stimuli-responsive materials, is a relatively new class of “soft” composite materials, consisting of magnetic nanoparticles embedded within a polymeric fibrous matrix. The presence of an externally applied magnetic field influences the properties of these materials rendering them useful in numerous technological and biomedical applications including sensing, magnetic separation, catalysis and magnetic drug delivery. This study deals with the fabrication and characterization of magnetoresponsive nanocomposite fibrous membranes consisting of methacrylic random copolymers based on methyl methacrylate (MMA) and 2-(acetoacetoxy)ethyl methacrylate (AEMA) (MMA-co-AEMA) and oleic acid-coated magnetite (OA·Fe3O4) nanoparticles. The AEMA moieties containingβ-ketoester side-chain functionalities were introduced for the first time in this type of materials, because of their inherent ability to bind effectively onto inorganic surfaces providing an improved stabilization. For membrane fabrication the electrospinning technique was employed and a series of nanocomposite membranes was prepared in which the polymer content was kept constant and only the inorganic (OA·Fe3O4) content varied. Further to the characterization of these materials in regards to their morphology, composition and thermal properties, assessment of their magnetic characteristics disclosed tunable superparamagnetic behaviour at ambient temperature.

Preparation and characterization of catalytic TiO2–SPPESK–PES nanocomposite membranes and kinetics analysis in esterification

2013 ◽  
Vol 430 ◽  
pp. 62-69 ◽  
Author(s):  
Xiao-Hua Ma ◽  
Xin Wen ◽  
Si-Wen Gu ◽  
Zhen-Liang Xu ◽  
Jin-Long Zhang
Keyword(s):  
Kinetics Analysis ◽  
Nanocomposite Membranes

Physical and Electrochemical Characterization of Nanocomposite Membranes of Nafion and Functionalized Silicon Oxide

2007 ◽  
Vol 19 (9) ◽  
pp. 2372-2381 ◽  
Author(s):  
Bradley P. Ladewig ◽  
Robert B. Knott ◽  
Anita J. Hill ◽  
James D. Riches ◽  
John W. White ◽  
...  
Keyword(s):  
Silicon Oxide ◽  
Electrochemical Characterization ◽  
Nanocomposite Membranes
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