Smart materials for smart production – a cross-disciplinary innovation network in the field of smart materials

Drossel, Welf Guntram; Meinel, F.; Bucht, André; Kunze, Holger

doi:10.1016/j.promfg.2018.02.111

Cited by 22 publications

(14 citation statements)

References 3 publications

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“…At room temperature, and due to the hygroscopic nature of the IL, the water molecules in air replace the Clions into the nickel complex (octahedral structure) as a result of the H-bonding interactions with the anion [NiCl4] 2in a symmetric complex (anion-H-O-H-anion). This leads to a disruption of the tetrahedral symmetry of blue colored [NiCl4] [2][3][4][5][6][7][8][9][10][11]37 . Upon heating at temperatures higher than 30 ºC, the water evaporation starts to occur as a result from a hydrothermochromic coordination reaction and the films change the color from transparent to dark blue (T>30 ºC) (Figure 4).…”

Section: Thermochromic Responsementioning

confidence: 99%

Ionic-Liquid-Based Printable Materials for Thermochromic and Thermoresistive Applications

Fernandes

Correia

García‐Astrain

et al. 2019

ACS Appl. Mater. Interfaces

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Smart materials exhibiting thermochromic and themoresistive properties based on the electroactive polymer poly(vinylidene) (PVDF) and the ionic liquid (IL) bis(1-butyl-3methylimidazolium) tetrachloronickelate ([Bmim]2[NiCl4]) have been developed with different contents of [Bmim]2[NiCl4] (10, 20 and 40 wt. %) within the polymer matrix. The morphology of the composites is studied and the thermochromic and thermoresistive properties evaluated. Independently of the IL content, PVDF/[Bmim]2[NiCl4] composites present a porous morphology and thermochromic response, revealed by the composites color change from transparent to a dark blue, and attributed to the tetrahedral complex NiCl4 2− formed after a dehydration process. Further, the electrical conductivity increases with increasing IL content and decreases with increasing temperature. It is also shown that the incorporation of the IL into the PVDF matrix leads to an increase in the electroactive β phase and a decrease of the degree of the crystallinity and thermal stability with increasing [Bmim]2[NiCl4] content. The printability and applicability of the developed materials as sensors is demonstrated.

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Section: Thermochromic Responsementioning

confidence: 99%

Ionic-Liquid-Based Printable Materials for Thermochromic and Thermoresistive Applications

Fernandes

Correia

García‐Astrain

et al. 2019

ACS Appl. Mater. Interfaces

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“…The main advantage is related to a large variety of ILs, which allows tuning materials responses to a large variety of external environmental stimuli, such as electrical and magnetic fields, heat, or light, among others, [ 17 ] based on the vast array of IL functional characteristics. [ 18 ] The material functionality is a result of the selection of the IL and its properties (e.g., size of cation/anion, viscosity, conductivity, density, and molecular weight) and the polymer type.…”

Section: Introductionmentioning

confidence: 99%

Ionic Liquid–Polymer Composites: A New Platform for Multifunctional Applications

Correia

Fernandes

Martins

et al. 2020

Adv Funct Materials

238

201

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Ionic liquids (ILs) have emerged as a novel class of chemical compounds for the development of advanced (multi)functional materials with outstanding potential in applications of several areas due to their unique properties and functionalities. The combination of ILs with polymers, in a composite, allows for developing smart materials, which synergistically combine the features of specific polymers and ILs. Moreover, ILs can be extensively modified by the incorporation of functional groups with specific properties into the cation, anion, or both. Thus, it is possible to tune the IL, the polymer, or both to obtain a broad spectrum of multifunctional composites and address the specific requirements of many applications. This work focusses on advanced materials and strategies concerning ILs and polymers for the development of smart IL/polymer‐based materials for applications including responsive and sensitive sensors, actuators, environment, batteries, fuel cells, and biomedical applications.

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“…For the latter, understanding and controlling of their composition and microstructure are the ultimate objectives for improved properties. Smart materials are able to respond to stimuli and environmental changes and to activate their functions according to these changes [5]. The stimuli like temperature, pressure, light, electric flow, etc can originate internally or externally and lead to chromogenic materials described as thermochromic, piezoelectric, photochromic and electrochromic materials [6].…”

Section: Introductionmentioning

confidence: 99%

Mo addition for improved electrochromic properties of V2O5 thick films

Mjejri

Gaudon

Rougier

2019

Solar Energy Materials and Solar Cells

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Transition metal oxides (TMOs) have attracted considerable attention due to their variety of chromogenic properties. Among them, vanadium pentoxide (V2O5) has gained significant interest in respect of multichromism associated with orange, green and blue colors. Herein, we report a simple and easy method for the fabrication of Mo doped V2O5 thick films, leading to improved cyclability. Molybdenum doped vanadium pentoxide powders were synthesized from one single polyol route through the precipitation of an intermediate precursor: molybdenum doped vanadium ethyleneglycolate (Mo doped VEG). The as-synthesized Mo-doped V2O5 exhibits improved electrochromic performance in terms of capacity, cycling stability, and color contrast compared to single-component V2O5 in lithium as well as sodium based electrolyte. The improvement in EC performances lies in films of higher porosity as well as higher diffusion coefficients. To conclude, an electrochromic device combining Mo-V2O5 to WO3.2H2O, via a PMMA-lithium based electrolyte membrane exhibit simultaneously reversible color change from yellow to green for Mo-V2O5 and from blue to yellow white for WO3.2H2O with a cycling stability up to 10 000 cycles.

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Smart materials for smart production – a cross-disciplinary innovation network in the field of smart materials

Cited by 22 publications

References 3 publications

Ionic-Liquid-Based Printable Materials for Thermochromic and Thermoresistive Applications

Ionic-Liquid-Based Printable Materials for Thermochromic and Thermoresistive Applications

Ionic Liquid–Polymer Composites: A New Platform for Multifunctional Applications

Mo addition for improved electrochromic properties of V2O5 thick films

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