scholarly journals The Use of Conductive Polymers Embedded Macro Porous Pei and Ionic Liquid Form of Pei Cryogels for Potential Conductometric Sensor Application to CO2

2020 ◽  
Vol 4 (1) ◽  
pp. 27 ◽  
Author(s):  
Sahin Demirci ◽  
Nurettin Sahiner
Keyword(s):  
Ionic Liquid ◽  
Conductive Polymers ◽  
Conductive Polymer ◽  
Potassium Thiocyanate ◽  
Conductivity Measurements ◽  
Liquid Form ◽  
Co2 Gas ◽  
Ft Ir ◽  
Sodium Tetrafluoroborate ◽  
Conductometric Sensor

Polyethyleneimine (PEI) cryogels with interconnected superporous morphology were synthesized via the cryopolymerization technique. Then, conductive polymers, poly(Aniline) (PANi), poly(Pyrrole) (PPy), and poly(Thiophene) (PTh) were prepared within these PEI cryogels. Then, the conductive polymer embedding PEI composites’ characterization was carried morphologically using scanning electron microscope (SEM) by means of Fourier Transform Infrared Radiation (FT-IR) spectrometer, and by means of electrical conductivity measurements using an electrometer. Among all the prepared cryogel conductive polymer composites, the highest value in terms of conductivity was determined for PEI/PANi cryogel composites with 4.80 × 10−3 S.cm−1. Afterward, to prepare polymeric ionic liquid (PIL) forms of PEI and PEI/PANi composites. To assess the effect of anions on the conductivities of the prepared composites, PEI-based cryogels were anion ex-changed after protonation with HCl by treatment of aqueous solutions of sodium dicyanamide (Na+[N(CN)2]−), ammonium hexafluorophosphate (NH4+[PF6]−), sodium tetrafluoroborate (Na+[BF4]−), and potassium thiocyanate (K+[SCN]−), separately. Furthermore, PEI-based cryogel composites and their PIL forms were tested as a sensor for CO2 gas. The higher conductivity changes were observed on bare PEI cryogel and PEI+[BF4]− PIL cryogels with 1000-fold decrease on conductivity upon 240 min CO2 exposure. The sensitivity and recovery percent of bare PEI and PEI+[BF4]− PIL cryogels were shown almost the same with a two-fold decrease in the presence of 0.009 mole of CO2 gas, and approximately 30% recovery after the fifth consecutive reuse.

Biocompatible, Flexible and Conductive Polymers Prepared by Biomass-derived Ionic Liquid Treatment

2021 ◽  
Author(s):  
Yannan Lu ◽  
Ruqing Lu ◽  
Xiaochun Hang ◽  
David James Young
Keyword(s):  
Health Care ◽  
Ionic Liquid ◽  
Conductive Polymers ◽  
Conductive Polymer ◽  
Post Treatment ◽  
Integrated Electronics ◽  
Ionic Liquid Treatment ◽  
Health Care Applications

Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) is a promising, biocompatible conductive polymer for bio-integrated electronics with health-care applications. However, the intrinsic biocompatibility of PEDOT: PSS is potentially jeopardized by post-treatment additives such as ionic...

scholarly journals Polymeric Composites Based on Carboxymethyl Cellulose Cryogel and Conductive Polymers: Synthesis and Characterization

2020 ◽  
Vol 4 (2) ◽  
pp. 33
Author(s):  
Sahin Demirci ◽  
S. Duygu Sutekin ◽  
Nurettin Sahiner
Keyword(s):  
Polymer Composites ◽  
Carboxymethyl Cellulose ◽  
Conductive Polymers ◽  
Conductive Polymer ◽  
Fold Increase ◽  
Natural Polymer ◽  
Conductive Polymer Composites ◽  
Ft Ir ◽  
Vapor Treatment ◽  
Ft Ir Spectroscopy

In this study, a super porous polymeric network prepared from a natural polymer, carboxymethyl cellulose (CMC), was used as a scaffold in the preparation of conductive polymers such as poly(Aniline) (PANi), poly(Pyrrole) (PPy), and poly(Thiophene) (PTh). CMC–conductive polymer composites were characterized by Fourier transform infrared (FT-IR) spectroscopy, thermogravimetric analysis (TGA) techniques, and conductivity measurements. The highest conductivity was observed as 4.36 × 10−4 ± 4.63 × 10−5 S·cm−1 for CMC–PANi cryogel composite. The changes in conductivity of prepared CMC cryogel and its corresponding PAN, PPy, and PTh composites were tested against HCl and NH3 vapor. The changes in conductivity values of CMC cryogel upon HCl and NH3 vapor treatment were found to increase 1.5- and 2-fold, respectively, whereas CMC–PANi composites showed a 143-fold increase in conductivity upon HCl and a 12-fold decrease in conductivity upon NH3 treatment, suggesting the use of natural polymer–conductive polymer composites as sensor for these gases.

scholarly journals Graphene Aerogels for In Situ Synthesis of Conductive Poly(para-phenylenediamine) Polymers, and Their Sensor Application

Micromachines ◽  
2020 ◽  
Vol 11 (7) ◽  
pp. 626
Author(s):  
Sahin Demirci ◽  
Mehmet Can ◽  
Nurettin Sahiner
Keyword(s):  
Chemical Reduction ◽  
Fold Increase ◽  
In Situ Synthesis ◽  
Conductivity Measurements ◽  
Co2 Gas ◽  
Graphene Aerogels ◽  
Different Types ◽  
Co2 Detection ◽  
Ft Ir

In this study, macroporous graphene aerogels (GAs) were synthesized by chemical reduction of graphene oxide sheets and were used as a support material for in situ synthesis of conductive poly(para-phenylenediamine) (p(p-PDA)). The in situ synthesis of p(p-PDA) in GA was carried out by using a simple oxidation polymerization technique. Moreover, the prepared conductive p(p-PDA) polymers in the networks of GAs were doped with various types of acids such as hydrochloric acid (HCl), nitric acid (HNO3), sulfuric acid (H2SO4), phosphoric acid (H3PO4), respectively. The prepared GA and different acid-doped forms as GA/p(p-PDA) composites were characterized by FT-IR, TGA, and conductivity measurements. The observed FT-IR peaks at 1574 cm−1, and 1491 cm−1, for stretching deformations of quinone and benzene, respectively, confirmed the in situ synthesis of P(p-PDA) polymers within GAs. The conductivity of GAs with 2.17 × 10−4 ± 3.15 × 10−5 S·cm−1 has experienced an approximately 250-fold increase to 5.16 × 10−2 ± 2.72 × 10−3 S·cm−1 after in situ synthesis of p(p-PDA) polymers and with HCl doping. Conductivity values for different types of acid-doped GA/p(p-PDA) composites were compared with the bare p(p-PDA) and their undoped forms. Moreover, the changes in the conductivity of GA and GA/p(p-PDA) composites upon CO2 gas exposure were compared and their sensory potential in terms of response and sensitivity, along with reusability in CO2 detection, were evaluated.

Effect of ionic liquid on polyaniline chemically synthesised under falling-pH conditions

2013 ◽  
Vol 67 (8) ◽  
Author(s):  
Anurag Krishna ◽  
Cosmin Laslau ◽  
Geoffrey Waterhouse ◽  
Zoran Zujovic ◽  
Jadranka Travas-Sejdic
Keyword(s):  
Ionic Liquid ◽  
Specific Surface ◽  
Conductivity Measurements ◽  
Experimental Conditions ◽  
Imidazolium Chloride ◽  
Temperature Dependence Of Conductivity ◽  
Wide Range ◽  
Structural And Electronic Properties ◽  
Ft Ir ◽  
Ph Conditions

AbstractThis study investigates the effect of the ionic liquid 1-butyl-3-methyl imidazolium chloride ([bmim]Cl) on the morphological, structural, and electronic properties of polyaniline (PANI) products synthesised by the falling-pH method. Products were characterised by SEM, FT-IR, UVVIS, N2-physisorption, and conductivity measurements. The [bmim]Cl addition strongly influenced the PANI morphology, specific surface area, porosity, and conductivity. Depending on the [bmim]Cl: ANI ratio and the synthesis pH, a wide range of PANI nanostructures could be prepared, with rod-like, and fibre-like elongated structures being the dominant morphology under most experimental conditions. Samples prepared in the presence of [bmim]Cl exhibit specific areas of ca 22–35 m2 g−1. The conductivity of the final products depends on the [bmim]Cl: ANI ratio. Temperature dependence of conductivity in the temperature range from 77 K to 300 K was also studied.

Synthesis, Characterization and Application of N,N-Dimethyl-N-Sulfoethan Ammonium tetra-Chloro Aluminate: A Novel micro-Heterogeneous Cata-lyst for Synthesis of tri-Arylmethanes

2020 ◽  
Vol 17 ◽  
Author(s):  
Saeid Azimi ◽  
Niloofar Mohamadighader
Keyword(s):  
Ionic Liquid ◽  
Heterogeneous Catalyst ◽  
Mass Spectroscopy ◽  
Aromatic Aldehydes ◽  
Solid Catalyst ◽  
Sem Images ◽  
One Pot ◽  
Acidic Catalyst ◽  
Eds Analysis ◽  
Ft Ir

Abstract: A new solid catalyst was synthesized from an ionic liquid and heterogenised by changing anion reaction. The new heterogeneous acidic catalyst was characterized by SEM images, EDS analysis, AFM images, Ft-IR, HNMR, 13CNMR and Mass Spectroscopy. It was applied to synthesis of tri-arylmethanes throughout one-pot tri-component reactions among aromatic aldehydes, N,N-dimethylaniline and other carbonic nucleophiles such as anisole and indole. Hence, synthesis of convenient and inexpensive micro-heterogeneous catalyst was introduced, the efficiency of which was confirmed. Also, various useful products were synthesized throughout this simple and clean procedure.

scholarly journals Synthesis of tetrazolo[1,5-a]pyrimidine-6-carbonitriles using HMTA-BAIL@MIL-101(Cr) as a superior heterogeneous catalyst

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Mohammad Hossein Abdollahi-Basir ◽  
Boshra Mirhosseini-Eshkevari ◽  
Farzad Zamani ◽  
Mohammad Ali Ghasemzadeh
Keyword(s):  
Ionic Liquid ◽  
Catalytic Activity ◽  
Reaction Time ◽  
Metal Organic Framework ◽  
One Pot ◽  
Short Reaction Time ◽  
Three Component Reaction ◽  
Metal Organic ◽  
Ft Ir ◽  
Novel Catalyst

AbstractA one-pot three component reaction of benzaldehydes, 1H-tetrazole-5-amine, and 3-cyanoacetyl indole in the presence of a new hexamethylenetetramine-based ionic liquid/MIL-101(Cr) metal–organic framework as a recyclable catalyst was explored. This novel catalyst, which was fully characterized by XRD, FE-SEM, EDX, FT-IR, TGA, BET, and TEM exhibited outstanding catalytic activity for the preparation of a range of pharmaceutically important tetrazolo[1,5-a]pyrimidine-6-carbonitriles with good to excellent yields in short reaction time.

Ultrasound-assisted aqua-mediated synthesis of multi-substituted tetrahydropyridine-3-carboxylates using N-carboxymethyl-3-pyridinium hydrogensulfate ([N-CH2CO2H-3-pic]+HSO4−) as a new efficient ionic liquid catalyst

2021 ◽  
Vol 3 (6) ◽  
Author(s):  
Kobra Nikoofar ◽  
Fatemeh Shahriyari
Keyword(s):  
Ionic Liquid ◽  
Reaction Times ◽  
Aromatic Aldehydes ◽  
Environmentally Benign ◽  
H Nmr ◽  
Sonic Waves ◽  
Ft Ir ◽  
High Yields ◽  
Work Up ◽  
C Nmr

AbstractA simple, straightforward, and ultrasound-promoted method for the preparation of some highly functionalized tetrahydropyridines reported via pseudo five-component reaction of (hetero)aromatic aldehydes, different anilines, and alkyl acetoacetates in the presence of [N-CH2CO2H-3-pic]+HSO4−, as a novel ionic liquid, in green aqueous medium. The IL was synthesized utilizing simple and easily-handled substrates and characterized by FT-IR, 1H NMR, 13C NMR, GC-MASS, FESEM, EDX, and TGA/DTG techniques. The procedure contains some highlighted aspects which are: (a) performing the MCR in the presence of aqua and sonic waves, as two main important and environmentally benign indexes in green and economic chemistry, (b) high yields of products within short reaction times, (c) convenient work-up procedure, (d) preparing the new IL via simple substrates and procedure.

scholarly journals Preparation and Characterisation of PVdF-LiBOB-Based Solid Polymer Electrolyte

2016 ◽  
Vol 1 (1) ◽  
Author(s):  
Christin Rina Ratri
Keyword(s):  
Polymer Electrolyte ◽  
Solid Polymer Electrolyte ◽  
Lithium Ion ◽  
Solid Polymer ◽  
Liquid Form ◽  
Host Matrix ◽  
Battery System ◽  
Reliability Factor ◽  
Safety And Reliability ◽  
Ft Ir

<p>Electrolyte plays a key role in lithium-ion battery system. Safety and reliability factor was the main background of the development of solid polymer electrolyte as a substitute the conventional electrolyte in liquid form. Preparation and characterisation of a polymer electrolyte system based on lithium bis(oxalato) borate or LiBOB salt and PVdF as the host matrix has been performed. LiBOB salt and PVdF polymer were dissolved in DMAC solvent followed by solid polymer electrolyte forming by means of doctor blade method. The membranes obtained were characterised by FT-IR, XRD, and EIS. It was shown that the electrolyte exhibited higher room ionic conductivity with the increase of salt concentration, with highest conductivity value of 1.22 × 10<sup>-6</sup> Scm<sup>-1</sup> for 70% LiBOB concentration.</p><p><strong> </strong></p>

Conductive polymer-based electro-conductive textile composites for electromagnetic interference shielding: A review

2016 ◽  
Vol 47 (8) ◽  
pp. 2228-2252 ◽  
Author(s):  
Subhankar Maity ◽  
Arobindo Chatterjee
Keyword(s):  
Electromagnetic Interference ◽  
Conductive Polymers ◽  
Conductive Polymer ◽  
Polymer Processing ◽  
Textile Composites ◽  
Electromagnetic Shielding ◽  
Electromagnetic Interference Shielding ◽  
Textile Materials ◽  
Electromagnetic Shield ◽  
Conductive Textile

This article reviews the preparation, development and characteristics of conductive polymer-based electro-conductive textile composites for electromagnetic interference shielding. Modification of ordinary textile materials in the form of electro-conductive composites makes them suitable for this purpose. Various metallic and non-metallic electro-conductive textiles have been explored here as the material for electromagnetic shielding. Different approaches of preparing textile electromagnetic shield have been described here. Recent advancements of application of conductive polymers in the field of textile electromagnetic shielding are described. Conductive polymer-coated textile materials showed superior electrical property as electromagnetic shield. Different methods of applications of conductive polymers onto textile surface are described here with their relative merits and demerits. Different conductive polymer-coated woven and nonwoven fabrics prepared by various researchers for electromagnetic shielding are taken into account. The effects of different process parameters of polymer processing on electromagnetic shielding are described.

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