Variable Emittance Skins for Active Thermal Control in Spacecraft Based on Conducting Polymers, Ionic Liquids and Specialized Coatings

Variable Emittance Electrochemical Devices for Spacecraft Application based on Ionic Liquids Coupled with Conducting Polymers

ECS Transactions ◽

10.1149/1.3159320 ◽

2019 ◽

Vol 16 (49) ◽

pp. 165-170

Author(s):

Prasanna Chandrasekhar ◽

Brian Zay ◽

Scott Barbolt ◽

Robert Werner ◽

Gajanana Birur ◽

...

Keyword(s):

Ionic Liquids ◽

Conducting Polymers ◽

Electrochemical Devices

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Variable-emittance infrared electrochromic skins combining unique conducting polymers, ionic liquid electrolytes, microporous polymer membranes, and semiconductor/polymer coatings, for spacecraft thermal control

Journal of Applied Polymer Science ◽

10.1002/app.40850 ◽

2014 ◽

Vol 131 (19) ◽

pp. n/a-n/a ◽

Cited By ~ 23

Author(s):

Prasanna Chandrasekhar ◽

Brian J. Zay ◽

David Lawrence ◽

Edmonia Caldwell ◽

Rubik Sheth ◽

...

Keyword(s):

Ionic Liquid ◽

Conducting Polymers ◽

Polymer Membranes ◽

Thermal Control ◽

Polymer Coatings ◽

Liquid Electrolytes ◽

Microporous Polymer ◽

Spacecraft Thermal Control

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Electrochemical Synthesis of Conducting Polymers Involving Deep Eutectic Solvents

Current Nanoscience ◽

10.2174/1573413715666190206145036 ◽

2020 ◽

Vol 16 (4) ◽

pp. 478-494 ◽

Cited By ~ 1

Author(s):

Florentina Golgovici ◽

Liana Anicai ◽

Andreea Florea ◽

Teodor Visan

Keyword(s):

Ionic Liquids ◽

Conducting Polymers ◽

Electrochemical Synthesis ◽

Conductive Polymers ◽

Electrochemical Polymerization ◽

Choline Chloride ◽

Deep Eutectic Solvents ◽

Widespread Application ◽

Eutectic Mixtures ◽

New Findings

Background: Deep eutectic solvents (DESs) represent a new generation of ionic liquids which are widely promoted as “green solvents”. They are gaining widespread application in materials chemistry and electrochemistry. DESs are defined as eutectic mixtures of quaternary ammonium salt with a hydrogen bond donor in certain molar ratios. Their use as solvents for electrochemical synthesis of conducting polymers could influence the polymer properties and reduce their economic cost. Objective: This review presents the most recent results regarding the electropolymerization of common conductive polymers involving choline chloride based ionic liquids. New findings from our laboratory on the electrochemical growth of conductive polymers are also discussed. Methods: The electrochemical polymerization mechanisms during synthesis of polypyrrole (PPy), polyaniline (PANI) and poly(3,4-ethylenedioxythiophene) (PEDOT) using various formulations of DESs are reviewed, as well as their characteristics, mainly from surface morphology view point. Results: Some general information related to the preparation and characterization of DESs is also presented, followed by an overview of the recent advances in the field of electropolymerization using DESs. Conclusion: Electropolymerization of conducting polymers involving DESs represents an attractive route of synthesis due to their compositional flexibility which makes possible the preparation of unlimited formulations further influencing the polymer morphology and properties. The use of these inexpensive eutectic mixtures has a large potential to contribute to the development of more sustainable technological processes meeting many of the required features characteristic to the green chemistry.

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