Ionic Liquid-Assisted Fabrication of Graphene-Based Electroactive Composite Materials

2017 ◽  
pp. 251-290
Author(s):  
Pia Damlin ◽  
Bhushan Gadgil ◽  
Carita Kvarnström
Keyword(s):  
Ionic Liquid ◽  
Composite Materials

Effects of ionic liquid types on the tribological, mechanical, and thermal properties of ionic liquid modified graphene/polyimide shape memory composites

2021 ◽  
pp. 095400832199676
Author(s):  
Yuting Ouyang ◽  
Qiu Zhang ◽  
Xiukun Liu ◽  
Ruan Hong ◽  
Xu Xu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Ionic Liquid ◽  
Composite Materials ◽  
Shape Memory ◽  
Recovery Rate ◽  
Shape Recovery ◽  
Graphene Nanosheets ◽  
Mechanical And Thermal Properties ◽  
Thermal And Mechanical Properties ◽  
Modified Graphene

Different ionic liquid modified graphene nanosheets (IG) were induced into polyimide (PI) to improve the tribological, thermal, and mechanical properties of shape memory IG/PI composites. The results demonstrated that when using 1-aminoethyl-3-methylimidazole bromide to modify graphene nanosheets (IG-1), the laser-driven shape recovery rate of IG-1/PI composites (IGPI-1) reached 73.02%, which was 49.36% higher than that of pure PI. In addition, the IGPI-1 composite materials reached the maximum shape recovery rate within 15 s. Additionally, under dry sliding, the addition of IG can significantly improve the tribological properties of composite materials. IGPI-1 exhibited the best self-lubricating properties. Compared with pure PI, the friction coefficient (0.19) and wear rate (2.62 × 10–5) mm3/Nm) were reduced by 44.1% and 24.2%, respectively, and the T10% of IGPI-1 increased by 32.2°C. The Tg of IGPI-1 reached 256.5°C, which was 8.4°C higher than that of pure PI. In addition, the tensile strength and modulus of IGPI-1 reached 82.3 MPa and 1.18 GPa, which were significantly increased by 33.6% and 29.8%, respectively, compared with pure PI. We hope that this work will be helpful for the preparation of shape memory materials with excellent tribological, thermal, and mechanical properties.

scholarly journals Poly(ionic liquid)-Modified Metal Organic Framework for Carbon Dioxide Adsorption

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 370 ◽  
Author(s):  
Guangyuan Yang ◽  
Jialin Yu ◽  
Sanwen Peng ◽  
Kuang Sheng ◽  
Haining Zhang
Keyword(s):  
Carbon Dioxide ◽  
Ionic Liquid ◽  
Composite Materials ◽  
Metal Organic Frameworks ◽  
Carbon Dioxide Partial Pressure ◽  
Carbon Dioxide Adsorption ◽  
Solid Sorbent ◽  
Practical Applications ◽  
Metal Organic ◽  
Poly Ionic Liquid

The design and synthesis of solid sorbents for effective carbon dioxide adsorption are essential for practical applications regarding carbon emissions. Herein, we report the synthesis of composite materials consisting of amine-functionalized imidazolium-type poly(ionic liquid) (PIL) and metal organic frameworks (MOFs) through complexation of amino groups and metal ions. The carbon dioxide adsorption behavior of the synthesized composite materials was evaluated using the temperature-programmed desorption (TPD) technique. Benefiting from the large surface area of metal organic frameworks and high carbon dioxide diffusivity in ionic liquid moieties, the carbon dioxide adsorption capacity of the synthesized composite material reached 19.5 cm3·g−1, which is much higher than that of pristine metal organic frameworks (3.1 cm3·g−1) under carbon dioxide partial pressure of 0.2 bar at 25 °C. The results demonstrate that the combination of functionalized poly(ionic liquid) with metal organic frameworks can be a promising solid sorbent for carbon dioxide adsorption.

scholarly journals Fundamental aspects of electrochemically controlled wetting of nanoscale composite materials

2017 ◽  
Vol 199 ◽  
pp. 75-99 ◽  
Author(s):  
A. Robert Hillman ◽  
Karl S. Ryder ◽  
Hani K. Ismail ◽  
Asuman Unal ◽  
Annelies Voorhaar
Keyword(s):  
Ionic Liquid ◽  
Composite Materials ◽  
Composite Films ◽  
Transport Processes ◽  
Electronic Charge ◽  
Energy Storage Devices ◽  
Protic Ionic Liquid ◽  
Practical Applications ◽  
Wave Measurements ◽  
Multi Walled Carbon Nanotubes

Electroactive films based on conducting polymers have numerous potential applications, but practical devices frequently require a combination of properties not met by a single component. This has prompted an extension to composite materials, notably those in which particulates are immobilised within a polymer film. Irrespective of the polymer and the intended application, film wetting is important: by various means, it facilitates transport processes – of electronic charge, charge-balancing counter ions (“dopant”) and analyte/reactant molecules – and motion of polymer segments. While film solvent content and transfer have been widely studied for pristine polymer films exposed to molecular solvents, extension to non-conventional solvents (such as ionic liquids) or to composite films has been given much less attention. Here we consider such cases based on polyaniline films. We explore two factors, the nature of the electrolyte (solvent and film-permeating ions) and the effect of introducing particulate species into the film. In the first instance, we compare film behaviours when exposed to a conventional protic solvent (water) with an aprotic ionic liquid (Ethaline) and the intermediate case of a protic ionic liquid (Oxaline). Secondly, we explore the effect of inclusion of physically diverse particulates: multi-walled carbon nanotubes, graphite or molybdenum dioxide. We use electrochemistry to control and monitor the film redox state and change therein, and acoustic wave measurements to diagnose rheologicallyvs.gravimetrically determined response. The outcomes provide insights of relevance to future practical applications, including charge/discharge rates and cycle life for energy storage devices, “salt” transfer in water purification technologies, and the extent of film “memory” of previous environments when sequentially exposed to different media.

Advanced Biopolymer Composite Materials from Ionic Liquid Solutions

2012 ◽  
pp. 167-187 ◽  
Author(s):  
Mirela L. Maxim ◽  
Jacqueline F. White ◽  
Leah E. Block ◽  
Gabriela Gurau ◽  
Robin D. Rogers
Keyword(s):  
Ionic Liquid ◽  
Composite Materials ◽  
Liquid Solutions

scholarly journals Density Functional Theory Studies on Zeolitic Imidazolate Framework-8 and Ionic Liquid-Based Composite Materials

ACS Omega ◽  
2019 ◽  
Vol 4 (27) ◽  
pp. 22655-22666 ◽  
Author(s):  
Anoopa Thomas ◽  
K. Rudharachari Maiyelvaganan ◽  
Shanmugasundaram Kamalakannan ◽  
Muthuramalingam Prakash
Keyword(s):  
Density Functional Theory ◽  
Ionic Liquid ◽  
Composite Materials ◽  
Density Functional ◽  
Zeolitic Imidazolate Framework ◽  
Functional Theory

Preparation of chitin nanowhiskers using an ionic liquid and their composite materials with poly(vinyl alcohol)

2011 ◽  
Vol 84 (4) ◽  
pp. 1408-1412 ◽  
Author(s):  
Jun-ichi Kadokawa ◽  
Akihiko Takegawa ◽  
Shozaburo Mine ◽  
Kamalesh Prasad
Keyword(s):  
Ionic Liquid ◽  
Composite Materials ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Chitin Nanowhiskers
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