Overview on lightweight, multifunctional materials

Costa, Carlos M.; Lanceros‐Méndez, S.

doi:10.1016/b978-0-12-818501-8.00002-0

Cited by 10 publications

(5 citation statements)

References 73 publications

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“…319 Also, conductive polymers forming ntype or p-type materials are used, typically based on modified coordination polymers. 318,320 The FOM of the thermoelectric materials is represented by T, known as the power factor of the device, described in eq 7: 293 = T S T k 2 (7) where S is the Seebeck effect, σ and k are the electrical and thermal conductivity, respectively, and T is the absolute temperature. The power factor (PF) of the materials is defined as PF = S 2 σ.…”

Section: Magnetoelectric Devicesmentioning

confidence: 99%

“…5 In particular, piezoelectric polymers can convert mechanical to electrical signals or vice versa, a characteristic that is taken to advantage in different areas such as sensors and actuators, biomedicine, energy generation, and storage, among others. 6,7 Within smart polymer-based materials, poly(vinylidene fluoride), PVDF, and its copolymers, poly(vinylidene fluoride-co-hexafluoropropylene) (poly(VDF-co-HFP)), poly-(vinylidene fluoride-co-trifluoroethylene) (poly(VDF-co-TrFE)), and poly(vinylidene fluoride-co-chlorotrifluoroethylene) (poly(VDF-co-CTFE)), stand out based on their high dielectric constant (ε′ up to 18), high piezoelectric coefficients (|d 31 | up to 30 pC•.N −1 , |d 33 | up to 140 pC•N −1 ), high purity, excellent mechanical properties, high resistance against chemicals, suitable thermal resistance, tailorable surface properties and morphology, among others, that depend on the specific crystalline phase of the polymer. 8−13 Other polymers, such as odd-numbered Nylons, 14 polylactic acid (PLLA), 15 poly(lactic-co-glycolic acid) (PLGA), 16 poly(3hydroxybutyrate-co-3-hydroxyvalerate) (PHBV), 17 and cellulose acetate (CA), 18 have also emerged and been applied in various technological applications based on their reasonable electroactive properties combined with some other suitable properties including biocompatibility, biodegradability, natural origin, or other relevante characteristics.…”

Section: Introductionmentioning

confidence: 99%

“…Many of the materials required for these technologies are based on polymer, as they present chemical stability, easy processability, tailorable properties, and low cost, some of them also showing electroactive properties such as piezoelectricity, pyroelectricity, and ferroelectricity . In particular, piezoelectric polymers can convert mechanical to electrical signals or vice versa, a characteristic that is taken to advantage in different areas such as sensors and actuators, biomedicine, energy generation, and storage, among others. , …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Smart and Multifunctional Materials Based on Electroactive Poly(vinylidene fluoride): Recent Advances and Opportunities in Sensors, Actuators, Energy, Environmental, and Biomedical Applications

Costa,

Cardoso,

Martins

et al. 2023

Chem. Rev.

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From scientific and technological points of view, poly(vinylidene fluoride), PVDF, is one of the most exciting polymers due to its overall physicochemical characteristics. This polymer can crystalize into five crystalline phases and can be processed in the form of films, fibers, membranes, and specific microstructures, being the physical properties controllable over a wide range through appropriate chemical modifications. Moreover, PVDF-based materials are characterized by excellent chemical, mechanical, thermal, and radiation resistance, and for their outstanding electroactive properties, including high dielectric, piezoelectric, pyroelectric, and ferroelectric response, being the best among polymer systems and thus noteworthy for an increasing number of technologies. This review summarizes and critically discusses the latest advances in PVDF and its copolymers, composites, and blends, including their main characteristics and processability, together with their tailorability and implementation in areas including sensors, actuators, energy harvesting and storage devices, environmental membranes, microfluidic, tissue engineering, and antimicrobial applications. The main conclusions, challenges and future trends concerning materials and application areas are also presented.

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Section: Magnetoelectric Devicesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Smart and Multifunctional Materials Based on Electroactive Poly(vinylidene fluoride): Recent Advances and Opportunities in Sensors, Actuators, Energy, Environmental, and Biomedical Applications

Costa,

Cardoso,

Martins

et al. 2023

Chem. Rev.

Self Cite

View full text Add to dashboard Cite

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“…Electro-active compounds with changing, evocating, and bleaching colors using appropriate electrochemical stimuli, such as the redox process (electron transfer), are called electrochromic materials [ 134 ] ( Table 1 ). Oxidation-reduction reactions during transmittance and/or reflectance are the main mechanisms for the color-changing phenomenon in these materials.…”

Section: Wearable Sensorsmentioning

confidence: 99%

A Review of Stimuli-Responsive Smart Materials for Wearable Technology in Healthcare: Retrospective, Perspective, and Prospective

et al. 2022

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In recent years thanks to the Internet of Things (IoT), the demand for the development of miniaturized and wearable sensors has skyrocketed. Among them, novel sensors for wearable medical devices are mostly needed. The aim of this review is to summarize the advancements in this field from current points of view, focusing on sensors embedded into textile fabrics. Indeed, they are portable, lightweight, and the best candidates for monitoring biometric parameters. The possibility of integrating chemical sensors into textiles has opened new markets in smart clothing. Many examples of these systems are represented by color-changing materials due to their capability of altering optical properties, including absorption, reflectance, and scattering, in response to different external stimuli (temperature, humidity, pH, or chemicals). With the goal of smart health monitoring, nanosized sol–gel precursors, bringing coupling agents into their chemical structure, were used to modify halochromic dyestuffs, both minimizing leaching from the treated surfaces and increasing photostability for the development of stimuli-responsive sensors. The literature about the sensing properties of functionalized halochromic azo dyestuffs applied to textile fabrics is reviewed to understand their potential for achieving remote monitoring of health parameters. Finally, challenges and future perspectives are discussed to envisage the developed strategies for the next generation of functionalized halochromic dyestuffs with biocompatible and real-time stimuli-responsive capabilities.

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“…Active smart materials groups include piezoelectric, piezoresistive, magnetorheological, magnetoelectric, shape memory, electrorheological, chromic, self‐healing, and pH‐sensitive materials, among others. [ 5 ] Since these materials possess a great capability to respond upon an external stimulus, they are excellent for sensing applications.…”

Section: Introductionmentioning

confidence: 99%

3D‐Printed Carrageenan‐Based Nanocomposites for Force‐Sensing Applications

et al. 2023

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Technological development is leading to an exponential growth in the implementation of sensors and actuators where the concern about environmental problems is also focusing on electronic waste (e‐waste), which is composed of hazardous materials, corresponding to a large part of urban waste, and has a strong environmental impact. Therefore, more environmentally friendly electronic components are required, natural polymers being a suitable approach to solve or attenuate those problems. This work reports on a bio‐based polymer, carrageenan, embedded with dielectric barium titanate (BTO) nanoparticles to tailor the electrical response. The inclusion of the filler induces slight modifications in the thermal characteristics and on the physicochemical properties of the polymer matrix. On the other hand, the mechanical and dielectric properties improve with the addition of BTO and a high dielectric constant of ε′ ≈13 000 is obtained for the composite with 20 wt% BTO content. The increase of the dielectric constant is accompanied by a high AC electrical conductivity, leading to a high‐ε′–high‐loss material. The 20 wt% BTO composite is used to produce a force measuring sensor, due to the highest dielectric response. The functional response of the sensing system shows good stability over cycling.

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Overview on lightweight, multifunctional materials

Cited by 10 publications

References 73 publications

Smart and Multifunctional Materials Based on Electroactive Poly(vinylidene fluoride): Recent Advances and Opportunities in Sensors, Actuators, Energy, Environmental, and Biomedical Applications

Smart and Multifunctional Materials Based on Electroactive Poly(vinylidene fluoride): Recent Advances and Opportunities in Sensors, Actuators, Energy, Environmental, and Biomedical Applications

A Review of Stimuli-Responsive Smart Materials for Wearable Technology in Healthcare: Retrospective, Perspective, and Prospective

3D‐Printed Carrageenan‐Based Nanocomposites for Force‐Sensing Applications

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