Interfacial Reaction and Electrochemical Activity of Thiokol Rubber/Conjugated Polymer Composites

1996 ◽  
Vol 461 ◽  
Author(s):  
Gong Ke-Cheng ◽  
Ma Wen-Shi
Keyword(s):  
Carbon Black ◽  
Conjugated Polymer ◽  
Oxidation Reaction ◽  
Reduction Potential ◽  
Composite Films ◽  
Oxidation Potential ◽  
Cyclic Voltammograms ◽  
Step Process ◽  
One Step ◽  
The Stability

ABSTRACTThe highly electroactive thiokol rubber (TR)/ conjugated polymer (eg. polyaniline (PAn) or polypyrrole (PPy)) composite films were prepared by electropolymenzation deposition via one-step process in the electrolytic solutions containing aniline or pyrrole and TR oligomer. The electrocatalysis of PAn or PPy for the electrodepolymerization (reduction)- electropolymenzation (oxidation) reaction of TR in the interface between PAn or PPy and TR is determined by cyclic voltammograms. The differeme between the oxidation potential and the reduction potential is 0.05V and 0.36V or less for TR/PAn and TR/PPy composite films, respectively The chemical bands between the nitrogen atoms of PAn or PPy and the mercaptan groups of TR (oligomer) are formed in the electropolymenzation process that is indicated by XPS. The conductivities of TR/PAn and TR/PPy composite films and the stability of the cells consisting of those films are remarkably improved after electrochemical reduction with addition of a suitable conducting carbon black.

Hyperbranched Conductive Polymers Constituted of Triphenylamine

1999 ◽  
Vol 600 ◽  
Author(s):  
S. Tanaka ◽  
K. Takeuchi ◽  
M. Asai ◽  
T. Iso ◽  
M. Ueda
Keyword(s):  
Molecular Weight ◽  
Conjugated Polymer ◽  
Grignard Reagent ◽  
Average Molecular Weight ◽  
Catalytic Amount ◽  
Oxidation Potential ◽  
Grignard Reaction ◽  
Step Process ◽  
One Step ◽  
Dark Blue

AbstractA hyperbranched conjugated polymer containing triphenylamine was prepared by the Grignard reaction of tris(4-bromophenyl)amine 1, via the coupling of N, N-bis(4-bromophenyl)-N-(4-bromomagnesiophenyl)amine 2 with the catalytic amount of Ni(acac)2. Grignard reagent 2 reacted as an AB2-type monomer to give hyperbranched conjugated polymer 3 in a one-step process. Polymer 3 was also obtained via the Pd-catalyzed coupling of N, N-bis(4-bromophenyl)-4-animobenzeneboronic acid 4. Polymer 3 had an average molecular weight of 4.0–6.3×103 and was found to be soluble in organic solvents such as THF and CHC13. A cast film had an anodic peak at 0.95–1.20 V vs. Ag wire. It was dark blue above the oxidation potential and brown-yellow in the neutral state. When polymer 3 was doped with iodine, its conductivity rose to 0.8–3.0 S/cm

Effect of RuO2 on Piezoresistive Properties of CB/MVQ Composite Materials

2014 ◽  
Vol 609-610 ◽  
pp. 124-129
Author(s):  
Ju Ying Wu ◽  
Jing Hui Fan ◽  
Yu Hong Huang ◽  
Jing Guo ◽  
Kai Zhang
Keyword(s):  
Composite Materials ◽  
Carbon Black ◽  
Silicone Rubber ◽  
Oxidation Reaction ◽  
Resistance Testing ◽  
Test Results ◽  
Sem And Tem ◽  
Pressure Resistance ◽  
The Stability

In this paper, RuO2-CB/MVQ composites were prepared through following steps. First, the nanoruthenium particles had been prepared by solvent thermo-deoxidization ways. Secondly, the nanoRuO2 particles had been formed by oxidation reaction of nanoruthenium particles in air. Thirdly, the carbon black/silicone rubber mixed rubber was prepared by solvent mixing. Fourthly, the nanoruthenium particles were mixed into carbon black/silicone rubber mixed rubber by rubbing dispersion. Finally, vulcanization molding was carried out at certain preasure and temperature. The piezoresistive properties of CB/MWQ composite materials were tested with pressure-resistance testing systems designed ourselves. The test results showed that suitable amounts of RuO2 could enhance the stability and creep of piezoresistive properties of CB/MWQ composite materials. The microstructure of CB/MWQ composite materials were analyzed with SEM and TEM. The characterization results showed that nanoRuO2 particles dispersed in composite materials in nanolevel. These nanostructure could improve conductive net of carbon black, and reinforce crosslink net of silicone rubber. These factors had advantage to the stability of piezoresistive properties of CB/MWQ composite materials.

One-step preparation of surface modified electrospun microfibers as suitable supports for protein immobilization

2017 ◽  
Vol 8 (11) ◽  
pp. 1790-1796 ◽  
Author(s):  
Guillaume Martrou ◽  
Marc Léonetti ◽  
Didier Gigmes ◽  
Thomas Trimaille
Keyword(s):  
Protein Immobilization ◽  
Immobilized Enzymes ◽  
Step Process ◽  
One Step ◽  
The Stability ◽  
Surface Modified

Surface modified microfibers were prepared in a one-step process, and were prone to retain the activity and improve the stability of immobilized enzymes.

scholarly journals sp2 Carbon Stable Radicals

2021 ◽  
Vol 7 (2) ◽  
pp. 31
Author(s):  
Elena F. Sheka
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Black ◽  
Intermolecular Interaction ◽  
Open Shell ◽  
Size And Shape ◽  
Spatially Extended ◽  
Stable Radicals ◽  
The Stability ◽  
Shungite Carbon ◽  
Technological Products

sp2 Nanocarbons such as fullerenes, carbon nanotubes, and graphene molecules are not only open-shell species, but spatially extended, due to which their chemistry is quite specific. Cogently revealed dependence of the final products composition on size and shape of the carbons in use as well as on the chemical prehistory is accumulated in a particular property—the stabilization of the species’ radical efficiency, thus providing the matter of stable radicals. If the feature is highly restricted and rarely available in ordinary chemistry, in the case of sp2 nanocarbons it is just an ordinary event providing, say, tons-in-mass stable radicals when either producing such widely used technological products as carbon black or dealing with deposits of natural sp2 carbons such as anthracite, shungite carbon, and other. Suggested in the paper is the consideration of stable radicals of sp2 nanocarbons from the standpoint of spin-delocalized topochemistry. Characterized in terms of the total and atomically partitioned number of effectively unpaired electrons as well as of the distribution of the latter over carbon atoms and described by selectively determined barriers of different reactions exhibiting topological essence of intermolecular interaction, sp2 nanocarbons reveal a peculiar topokinetics that lays the foundation of the stability of their radical properties.

Functionalized aluminum-catalyzed silicon nanowire formation and radial junction photovoltaic devices

Nanoscale ◽  
2021 ◽  
Author(s):  
Wipakorn Jevasuwan ◽  
Naoki Fukata
Keyword(s):  
Surface Modification ◽  
Solar Cells ◽  
Surface Defects ◽  
Silicon Nanowire ◽  
Photovoltaic Devices ◽  
Step Process ◽  
One Step ◽  
Length Reduction

Vertical Al-catalyzed SiNW arrays with shaped surfaces were synthesized by a one-step process and NW-based solar cells were demonstrated with optimized NW surface defects through surface modification and length reduction.

scholarly journals RGD-decorated conjugated polymer particles as fluorescent biomedical probes prepared by Sonogashira dispersion polymerization

2015 ◽  
Vol 51 (45) ◽  
pp. 9358-9361 ◽  
Author(s):  
Naveed Anwar ◽  
Anne Rix ◽  
Wiltrud Lederle ◽  
Alexander J. C. Kuehne
Keyword(s):  
Click Chemistry ◽  
Fluorescent Probes ◽  
Conjugated Polymer ◽  
Dispersion Polymerization ◽  
Cell Labelling ◽  
Polymer Particles ◽  
Free Thiol ◽  
One Step

We present a one-step Sonogashira dispersion polymerization generating monodisperse conjugated polymer particles with acetylene units on their surface. These moieties can be bio-functionalized using copper-free thiol-yne click chemistry providing fluorescent probes for cell labelling and imaging.

One step room temperature photodeposition of Cu/TiO2 composite films and its conversion to CuO/TiO2

2009 ◽  
Vol 517 (19) ◽  
pp. 5621-5624 ◽  
Author(s):  
Eilidh Morrison ◽  
David Gutiérrez-Tauste ◽  
Concepción Domingo ◽  
Elena Vigil ◽  
José A. Ayllón
Keyword(s):  
Room Temperature ◽  
Composite Films ◽  
One Step
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