scholarly journals ENHANCEMENT OF ELECTRICAL CONDUCTIVITY IN POLYVINYL ALCOHOL FILMS BY DOPING WITH Nd3+IONS

2017 ◽  
Vol 5 (4RAST) ◽  
pp. 87-91
Author(s):  
Vijaya Kumar
Keyword(s):  
Electrical Conductivity ◽  
Polyvinyl Alcohol ◽  
Dopant Concentration ◽  
Nitrate Hexahydrate ◽  
X Ray Diffraction ◽  
Casting Method ◽  
Xrd Pattern ◽  
X Ray ◽  
Solution Casting Method ◽  
Polyvinyl Alcohol Films

The electrical properties of polyvinyl alcohol (PVA) films have been improved pronouncedly by doping with Neodymium (III) nitrate hexahydrate.  Pure PVA and PVA: Nd3+ films have been prepared by solution casting method. Both type of films were characterized by X-ray diffraction technique for structural studies. XRD pattern shows the appreciable shift of 2Ө towards higher value with increase in Nd3+ concentration. This signifies the presence Nd3+ dopant in polymer matrix. Further direct current electrical conductivity (σ) of Nd3+ doped PVA films in the temperature range 500C-1600C has been studied using four probe techniques. For a given concentration σ increases with increase in temperature and with dopant concentration. At 1200C, conductivity of PVA: Nd3+ (10 mol %) film is 7.116 μΩ-1cm-1, PVA: Nd3+ (15 mol %) film is 11.176 μΩ-1cm-1, PVA: Nd3+ (20 mol %) film is 17.418 μΩ-1cm-1 and PVA: Nd3+ (25 mol %) film is 23.740 μΩ-1cm-1. This result indicated the enhancement of the electrical conductivity of PVA films with Nd3+ concentration.

The Effect of Ammonium Bromide on Methylcellulose Biopolymer Electrolytes for Electrical Studies

2021 ◽  
Vol 317 ◽  
pp. 426-433
Author(s):  
Siti Nurhaziqah Abd Majid ◽  
Afiqah Qayyum Ishak ◽  
Nik Aziz Nik Ali ◽  
Muhamad Zalani Daud ◽  
Hasiah Salleh
Keyword(s):  
Fourier Transform ◽  
Ammonium Bromide ◽  
Solution Casting ◽  
X Ray Diffraction ◽  
Casting Method ◽  
X Ray ◽  
Electrical Studies ◽  
Biopolymer Electrolytes ◽  
Salt Complex ◽  
Solution Casting Method

The development of biopolymer electrolytes based on methylcellulose (MC) has been accomplished by incorporating ammonium bromide (NB) to the polymer-salt system. The biopolymer electrolytes were prepared via solution-casting method. The conductivity and permittivity characteristics of the material were studied. The biopolymer-salt complex formation have been analysed through Fourier Transform Infrared (FTIR) spectroscopy and X-ray diffraction (XRD). The conductivity of the sample was measured by EIS HIOKI. Upon addition of 20 wt.% of NB, highest conductivity of 3.25×10-4 μScm-1 was achieved at ambient temperature. The temperature dependence of the biopolymer electrolytes exhibit Arrhenius behaviour. This result had been further proven in FTIR study.

scholarly journals Preparation, Physicochemical Characterization, and Microrobotics Applications of Polyvinyl Chloride- (PVC-) Based PANI/PEDOT: PSS/ZrP Composite Cation-Exchange Membrane

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Mohd Imran Ahamed ◽  
Inamuddin ◽  
Abdullah M. Asiri ◽  
Mohammad Luqman ◽  
Lutfullah
Keyword(s):  
Physicochemical Characterization ◽  
Solution Casting ◽  
Polystyrene Sulfonate ◽  
X Ray Diffraction ◽  
Casting Method ◽  
X Ray ◽  
Solution Casting Method ◽  
Exchange Membrane ◽  
Differential Thermogravimetry ◽  
Aniline Polymerization

Poly(3,4-ethylene dioxythiophene): polystyrene sulfonate (PEDOT: PSS) zirconium(IV) phosphate (ZrP) based ionomeric membrane was prepared by a solution-casting method. Subsequently, aniline polymerization was carried out on the surface of the membrane by oxidative chemical polymerization. It was characterized by thermogravimetric analysis/differential thermal analysis/differential thermogravimetry (TGA/DTA/DTG), scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive X-ray (EDX) analysis, and Fourier-transform infrared (FTIR) spectroscopy. The membrane was also characterized by ion-exchange properties. The tip displacement investigation of the ionomeric membrane was also carried out. The outcomes demonstrated that the manufactured ionomeric membrane could produce generative strengths (tip powers), and consequently create good displacement. In this manner, the proposed ionomeric membrane was found proper for bending movement actuator that will give a successful and promising stage for smaller-scale mechanical applications.

scholarly journals Microstructures and Electrical Properties of HPMC/PVP Polymer Blend Films Complex with Ferric Chloride (FeCl3)

2014 ◽  
Vol 11 (2) ◽  
pp. 153-158
Author(s):  
H Ananda ◽  
T Urs ◽  
Y Prakash ◽  
K Hemalatha ◽  
H Somashekarappa ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Structural Modification ◽  
Dopant Concentration ◽  
Methyl Cellulose ◽  
Vinyl Pyrrolidone ◽  
X Ray Diffraction ◽  
X Ray ◽  
Blend Films ◽  
Poly Vinyl Pyrrolidone ◽  
Microstructural Studies

Microstructural studies on FeCl3 doped Hydroxypropyl methyl cellulose (HPMC)/Poly vinyl pyrrolidone (PVP) blend films were carried out using X-Ray diffraction studies. The XRD data revealed that the crystalline regions of the HPMC/PVP blend film decreases up to a certain percentage of FeCl3 and then increases. Electrical conductivity studies on these doped films suggest complex formation due to doping which affects microstructure and also ac conductivity of polymer films. All these results were analyzed and explained on the basis of micro structural modification of HPMC/PVP blends as function of dopant concentration.

scholarly journals Miscibility studies of polystyrene/polyvinyl chloride blend in presence of organoclay

2019 ◽  
Vol 17 (1) ◽  
pp. 927-935 ◽  
Author(s):  
Jumaa Aseeri ◽  
Naser M. Alandis ◽  
Waffa Mekhamer ◽  
Manawwer Alam
Keyword(s):  
Polyvinyl Chloride ◽  
Cetylpyridinium Chloride ◽  
X Ray Diffraction ◽  
Casting Method ◽  
Scanning Calorimetry ◽  
Local Clay ◽  
X Ray ◽  
Sem And Tem ◽  
Transmission Electron ◽  
Solution Casting Method

AbstractPolystyrene (PS)/ polyvinyl chloride (PVC) blends of different compositions, with and without organoclay (OC) were prepared by a solution casting method. PS and PVC were combined in ratios of 100/0, 90/10, 10/90, and 0/100. Local clay was treated with 0.5M NaCl to generate sodium clay (Na-clay). The Na-clay was subsequently modified using the cationic surfactant, cetylpyridinium chloride (CPC), at a concentration of 0.5 times that of Na-clay. The CPC-modified clay was denoted as organoclay (OC). The organoclay was dispersed in PS/PVC blends (90/10 and 10/90) with different weight percentages of OC (0%, 1%, 5%, and 10%). To evaluate the miscibility of PS/PVC blends, the blends with and without OC were characterized using Fourier-transform infrared (FTIR) spectroscopy, differential scanning calorimetry (DSC), X-ray diffraction (XRD), and scanning and transmission electron microscopy (SEM and TEM). The addition of OC to the PS/PVC blends produced exfoliated nanocomposites, as proven by XRD. The SEM and TEM micrographs showed that the PS/PVC(10/90) blend components were more miscible than those of the PS/PVC(90/10) blend, leading to favorable morphology.

Synthesis and Characterization of Polyvinyl Alcohol/Zinc Hydroxide Composite

2016 ◽  
Vol 701 ◽  
pp. 307-311
Author(s):  
Umma Habiba ◽  
Amalina Muhammad Afifi ◽  
Bee Chin Ang
Keyword(s):  
Fourier Transform ◽  
Polyvinyl Alcohol ◽  
Electron Spectroscopy ◽  
Synthesis And Characterization ◽  
Zinc Hydroxide ◽  
Film Casting ◽  
X Ray Diffraction ◽  
Casting Method ◽  
X Ray

In this study, Polyvinyl Alcohol /Zinc Hidroxide composite was synthesised via film casting method. Fourier transform infrared and X-Ray diffraction was undertaken to analyze the interaction between polyvinyl alcohol and zinc hydroxide.Morphology of the resulting PVA/Zn(OH)2 composite structure was observed by Field Emission Scannig Electron Spectroscopy. FTIR and XRD results showed interaction between PVA and zinc hydroxide. These interaction are responsible for change in the thermal behavior of the composite.

scholarly journals Studies on AC Electrical Conductivity of CdCl2Doped PVA Polymer Electrolyte

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
M. B. Nanda Prakash ◽  
A. Manjunath ◽  
R. Somashekar
Keyword(s):  
Electrical Conductivity ◽  
Ionic Conductivity ◽  
Polymer Electrolytes ◽  
Profile Analysis ◽  
Line Profile Analysis ◽  
Solvent Casting ◽  
X Ray Diffraction ◽  
Casting Method ◽  
Ac Electrical Conductivity ◽  
X Ray

PVA-based polymer electrolytes were prepared with various concentrations of CdCl2using solvent casting method. Prepared polymer films were investigated using line profile analysis employing X-ray diffraction (XRD) data. XRD results show that the crystallite size decreases and then increases with increase in CdCl2. AC conductivity in these polymer increases films first and then decreases. These observations are in agreement with XRD results. The highest ionic conductivity of 1.68E− 08 Scm−1was observed in 4% of CdCl2in PVA polymer blend. Crystallite ellipsoids for different concentrations of CdCl2are computed here using whole pattern powder fitting (WPPF) indicating that crystallite area decreases with increase in the ionic conductivity.

Preparation and Thermal Properties of Cellulose/Layered Silicate Montmorillonite Nanocomposites Prepared via Ionic Liquids

2011 ◽  
Vol 471-472 ◽  
pp. 786-791 ◽  
Author(s):  
Mahmoudian Shaya ◽  
Uzir Wahit Mat ◽  
A.A. Yussuf ◽  
Nematzadeh Navid
Keyword(s):  
Layered Silicate ◽  
Regenerated Cellulose ◽  
X Ray Diffraction ◽  
Casting Method ◽  
X Ray ◽  
Degradation Temperature ◽  
Cellulose Matrix ◽  
Solution Casting Method ◽  
Cellulose Nanocomposites ◽  
Cellulose Concentration

Environmentally friendly nanocomposites comprising of cellulose and montmorillonite (MMT) were prepared via a green solvent, ionic liquid, 1-butyl-3-methylimidazolium chloride (BMIMCl) using solution casting method. The cellulose concentration and MMT content were varied according to predetermine formulation. The regenerated cellulose nanocomposites were characterized using X-ray diffraction (XRD). The thermal and thermal oxidative properties of regenerated cellulose nanocomposites were studied by thermogravimetric analysis (TGA). Mechanical properties of the nanocomposites films were investigated by tensile strength measurements. The intercalation and exfoliation of MMT in the cellulose matrix were confirmed by XRD results. TGA results showed an increment in degradation temperature and char yield for the nanocomposites. Multistep TGA graph was observed for degradation under air. The results indicated that the addition of MMT up to 6 wt% in regenerated cellulose matrix improved the tensile properties.

scholarly journals Effect of graphene nanoplatelet addition on the electrical conductivity of poly(hydroxybutyrate-co-hydroxyvalerate) biocomposites

2021 ◽  
Vol 2080 (1) ◽  
pp. 012010
Author(s):  
Syarifah Nuraqmar Syed Mahamud ◽  
Ovinesh Ganesan ◽  
Mohd Hanif Mohd Pisal ◽  
Nurul Ekmi Rabat
Keyword(s):  
Electrical Conductivity ◽  
Conductive Filler ◽  
Filler Loading ◽  
Solvent Casting ◽  
X Ray Diffraction ◽  
Casting Method ◽  
Simple Method ◽  
Graphene Nanoplatelet ◽  
X Ray ◽  
Biocomposite Films

Abstract Poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV) is one of the most promising biodegradable polymers used in many applications due to its biodegradability and non-toxicity. However, the usage of PHBV in electronic, biomedical, and biosensor applications has been limited due to its poor electrical properties. This study shows a simple method of producing and enhancing the electrical conductivity of PHBV-based biocomposites by adding graphene nanoplatelet (GNP) as a conductive filler. The biocomposite films were prepared using the solvent casting method, consist of five GNP loading (0-5 wt. %). The prepared PHBV/GNP biocomposites show enhanced electrical conductivity compared to neat PHBV. PHBV/GNP biocomposite with 5 wt. % filler loading exhibits the highest electrical conductivity at 3.83 × 10−3 S/cm. Higher crystalline regions in the PHBV/GNP biocomposites have facilitated the transfer of electrons between PHBV, resulting in the formation of conductive biocomposites, as evident from X-ray diffraction (XRD) characterization.

scholarly journals STUDY THE STRUCTURE OF BIODEGRADABLE NANOCOMPOSITE ATERIAL BASED ON THERMOPLASTIC STARCH AND POLY(VYNYL ALCOHOL)

2009 ◽  
Vol 12 (3) ◽  
pp. 62-68
Author(s):  
Nghia Phuoc Truong ◽  
Thuan Quang Tran ◽  
Tai Tan Dang ◽  
Huy Thuc Ha
Keyword(s):  
Electron Microscope ◽  
Thermoplastic Starch ◽  
Nanocomposite Materials ◽  
Solution Casting ◽  
X Ray Diffraction ◽  
Casting Method ◽  
X Ray ◽  
Nano Structures ◽  
Transmission Electron ◽  
Solution Casting Method

Biodegradable nanocomposite material based on thermoplastic starch and poly(vynyl alcohol) has been successfully synthesized by solution casting method. The clay contents using as nano-filler are 3, 7, 9, 11, 13 and 50phr. All of these products have nano-structures. These structures of montmorillonite dispersing phases are studied by Small Angle X-Ray Diffraction machine (SAXRD) and Transmission Electron Microscope (TEM). Morphology of the blend of thermoplastic starch and poly(vynyl alcohol) changes when montmorillonite is added. The morphologies of polymer blend and nanocomposite materials are characterized by Scanning Electron Microscope (SEM).

scholarly journals Structural Properties of Nanoparticles TiO2/PVA Polymeric Films

2018 ◽  
Vol 28 (2) ◽  
pp. 188
Author(s):  
Samara A. Madhloom
Keyword(s):  
Titanium Dioxide ◽  
Full Width Half Maximum ◽  
Polymeric Films ◽  
Particle Sizes ◽  
X Ray Diffraction ◽  
Casting Method ◽  
Xrd Pattern ◽  
X Ray ◽  
Crystalline Nature ◽  
Petri Dishes

In this research, X-ray diffraction of the powder (PVA polymer, titanium dioxide with two parti-cle sizes) and (TiO2 (15.7 nm)/PVA and TiO2 (45.7 nm)/PVA) films have been studied,the amount of polymer is (0.5) g and (0.01)g from each particle sizes of nanoparticles will be used. Casting method is used to prepare homogeneous films on glass petri dishes. All parameters ac-counted for the X-ray diffraction; full width half maximum (FWHM), Miller indices (hkl), size of crystalline (D), Specific Surface Area (S) and Dislocation Density (δ). The nature of the structural of materials and films will be investigated. The XRD pattern of PVA polymer has semi-crystalline nature and the titanium dioxide with two particle sizes have crystalline structure; ana-tase type. While the mixture between these materials led to appearing some crystalline peaks into XRD pattern of PVA polymer

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