scholarly journals Side-chain engineering of green color electrochromic polymer materials: toward adaptive camouflage application

2016 ◽  
Vol 4 (12) ◽  
pp. 2269-2273 ◽  
Author(s):  
Hongtao Yu ◽  
Shan Shao ◽  
Lijia Yan ◽  
Hong Meng ◽  
Yaowu He ◽  
...  
Keyword(s):  
High Stability ◽  
Strong Absorption ◽  
Polymer Materials ◽  
Side Chain ◽  
Green Color ◽  
Fast Switching ◽  
Switching Times ◽  
Electrochromic Polymers ◽  
Electrochromic Polymer ◽  
Brown Color

The synthesised electrochromic polymers can exhibit a vegetable-green color at lower applied voltages and a soil-brown color in the oxidized-state, excellent solubility, superhydrophobicity, strong absorption, very fast switching times, and high stability.

A novel red to transmissive electrochromic polymer based on phenanthrocarbazole

RSC Advances ◽  
2016 ◽  
Vol 6 (30) ◽  
pp. 25620-25623 ◽  
Author(s):  
G. Atakan ◽  
G. Gunbas
Keyword(s):  
Optical Contrast ◽  
Fast Switching ◽  
Switching Times ◽  
Electrochromic Polymer

This work describes the synthesis of a novel red to transmissive electrochromic polymer with high optical contrast and fast switching times.

Fast Switching Water Processable Electrochromic Polymers

2012 ◽  
Vol 4 (12) ◽  
pp. 6512-6521 ◽  
Author(s):  
Pengjie Shi ◽  
Chad M. Amb ◽  
Aubrey L. Dyer ◽  
John R. Reynolds
Keyword(s):  
Fast Switching ◽  
Electrochromic Polymers

Design Method for Fast Switching Seat Valves for Digital Displacement® Machines

2014 ◽  
Author(s):  
Daniel B. Roemer ◽  
Per Johansen ◽  
Henrik C. Pedersen ◽  
Torben O. Andersen
Keyword(s):  
Pressure Loss ◽  
Design Method ◽  
Thermal Dissipation ◽  
Valve Design ◽  
Stroke Length ◽  
Efficient Operation ◽  
Fast Switching ◽  
Switching Times ◽  
High Bandwidth ◽  
Electro Magnetic

Digital Displacement® (DD) machines are upcoming technology where the displacement of each pressure chamber is controlled electronically by use of two fast switching seat valves. The effective displacement and operation type (pumping/motoring) may be controlled by manipulating the seat valves corresponding to the piston movement, which has been shown to facilitate superior part load efficiency combined with high bandwidth compared to traditional displacement machines. However, DD machines need fast switching on-off valves with low pressure loss for efficient operation, especially in fast rotating operation, where switching times must be performed within a few milliseconds. These valve requirements make a simulation based design approach essential, where mechanical strength, thermal dissipation, fluid dynamics and electro-magnetic dynamics must be taken into account. In this paper a complete design method for DD seat valves are presented, taking into account the significant aspects related to obtaining efficient DD valves with basis in a given DD machine specifications. The seat area is minimized and the stroke length is minimized to obtain fast switching times while considering the pressure loss of the valves. A coupled optimization is finally conducted to optimize the electro-magnetic actuator, leading to a valve design based on the chosen valve topology. The design method is applied to an example DD machine and the resulting valve design fulfilling the requirements is presented.

Conjugated electrochromic polymers with amide-containing side chains enabling aqueous electrolyte compatibility

2020 ◽  
Vol 11 (2) ◽  
pp. 508-516 ◽  
Author(s):  
Kuluni Perera ◽  
Zhengran Yi ◽  
Liyan You ◽  
Zhifan Ke ◽  
Jianguo Mei
Keyword(s):  
Functional Groups ◽  
Aqueous Electrolyte ◽  
Side Chain ◽  
Side Chains ◽  
Electrochromic Polymers

This work illustrates an effective side-chain modification approach using amide functional groups to induce aqueous electroactivity to ProDOT-based electrochromic polymers.

Ferroelektrische Flüssigkristall - Mischungen mit Kohlenhydrat - Derivaten als Dotierstoffe / Ferroelectric Liquid Crystal Mixtures with Carbohydrate Derivates as Dopants

1989 ◽  
Vol 44 (7) ◽  
pp. 675-679 ◽  
Author(s):  
V. Vill ◽  
F. Fischer ◽  
J. Thiem
Keyword(s):  
Liquid Crystal ◽  
Chiral Center ◽  
Ferroelectric Liquid Crystal ◽  
Fast Switching ◽  
Switching Times ◽  
Smectic Phases ◽  
First Time ◽  
Helical Twisting Power

Abstract For the first time carbohydrate derivatives were studied as dopants for calamitic smectic phases. Fast switching ferroelectric cells could be realized, and electroclinic effects were observed. By inversion of configuration at a chiral center of these compounds switching times, solubility, and helical twisting power vary by orders of magnitude. The studied derivatives showed modest solubility properties.

Nanostructured metallo-supramolecular polymer-based gel-type electrochromic devices with ultrafast switching time and high colouration efficiency

2019 ◽  
Vol 7 (10) ◽  
pp. 2871-2879 ◽  
Author(s):  
Susmita Roy ◽  
Chanchal Chakraborty
Keyword(s):  
Switching Time ◽  
Supramolecular Polymer ◽  
Electrochromic Devices ◽  
Switching Times ◽  
Polymer Nanostructures ◽  
Ultrafast Switching ◽  
Electrochromic Polymer

Herein, we fabricated the ordered polymer nanostructures by compositing the electrochromic polymer polyFe to significantly improve the colouration efficiency and switching times.

scholarly journals Polysiloxane-Based Side Chain Liquid Crystal Polymers: From Synthesis to Structure–Phase Transition Behavior Relationships

Polymers ◽  
2018 ◽  
Vol 10 (7) ◽  
pp. 794 ◽  
Author(s):  
Lanying Zhang ◽  
Wenhuan Yao ◽  
Yanzi Gao ◽  
Cuihong Zhang ◽  
Huai Yang
Keyword(s):  
Phase Transition ◽  
Liquid Crystal ◽  
Liquid Crystalline ◽  
Molecular Design ◽  
Molecular Structures ◽  
Polymer Materials ◽  
Side Chain ◽  
Liquid Crystal Polymers ◽  
Thermal Stabilities ◽  
Structure Phase Transition

Organosilicon polymer materials play an important role in certain applications due to characteristics of much lower glass transition temperatures (Tg), viscosities, surface energy, as well as good mechanical, thermal stabilities, and insulation performance stemming from the higher bond energy and the larger bond angles of the adjacent silicon-oxygen bond. This critical review highlights developments in the synthesis, structure, and phase transition behaviors of polysiloxane-based side chain liquid crystal polymers (PSCLCPs) of linear and cyclic polysiloxanes containing homopolymers and copolymers. Detailed synthetic strategies are elaborated, and the relationship between molecular structures and liquid crystalline phase transition behaviors is systematically discussed, providing theoretical guidance on the molecular design of the materials.

scholarly journals Yellow electrochromic polymer materials with fine tuning electrofluorescences by adjusting steric hindrance of side chains

RSC Advances ◽  
2017 ◽  
Vol 7 (41) ◽  
pp. 25444-25449 ◽  
Author(s):  
Jian Liu ◽  
Yuchen Shi ◽  
Jingchuan Wu ◽  
Mei Li ◽  
Jianming Zheng ◽  
...  
Keyword(s):  
Steric Hindrance ◽  
External Potential ◽  
Polymer Materials ◽  
Fine Tuning ◽  
Side Chains ◽  
Structure Property ◽  
Structure Property Relationships ◽  
Electrochromic Polymer

A series of novel conducting conjugated yellow-to-transmissive electrochromic (EC) polymers were designed to research their structure–property relationships, achieving electrofluorescent (EF) switching with applied external potential.

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