Piezoelectric and Electromechanical Characteristics of Porous Poly(Ethylene-co-Vinyl Acetate) Copolymer Films for Smart Sensors and Mechanical Energy Harvesting Applications

Ennawaoui, Chouaib; Hajjaji, Abdelowahed; Samuel, C.; Sabani, Erroumayssae; Rjafallah, Abdelkader; Najihi, Ikrame; Laadissi, El Mehdi; Loualid, El Mehdi; Rguiti, Mohamed; Ballouti, Abdessamad El; Azim, Azeddine

doi:10.3390/asi4030057

Cited by 16 publications

(3 citation statements)

References 43 publications

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“…The different porosity of the dense CNF and the porous pulp films could be another explanation. However, it was reported that porosity in both inorganic and polymeric films generally increases the piezoelectric response [ 61 , 62 , 63 ], including in cellulose aerogels [ 16 ]. It was reasoned that the internal voids enhance the strain on the crystal structure and thereby increase the piezoelectricity.…”

Section: Resultsmentioning

confidence: 99%

Advanced Cellulose–Nanocarbon Composite Films for High-Performance Triboelectric and Piezoelectric Nanogenerators

et al. 2023

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Natural polymers such as cellulose have interesting tribo- and piezoelectric properties for paper-based energy harvesters, but their low performance in providing sufficient output power is still an impediment to a wider deployment for IoT and other low-power applications. In this study, different types of celluloses were combined with nanosized carbon fillers to investigate their effect on the enhancement of the electrical properties in the final nanogenerator devices. Cellulose pulp (CP), microcrystalline cellulose (MCC) and cellulose nanofibers (CNFs) were blended with carbon black (CB), carbon nanotubes (CNTs) and graphene nanoplatelets (GNPs). The microstructure of the nanocomposite films was characterized by scanning electron and probe microscopies, and the electrical properties were measured macroscopically and at the local scale by piezoresponse force microscopy. The highest generated output voltage in triboelectric mode was obtained from MCC films with CNTs and CB, while the highest piezoelectric voltage was produced in CNF-CNT films. The obtained electrical responses were discussed in relation to the material properties. Analysis of the microscopic response shows that pulp has a higher local piezoelectric d33 coefficient (145 pC/N) than CNF (14 pC/N), while the macroscopic response is greatly influenced by the excitation mode and the effective orientation of the crystals relative to the mechanical stress. The increased electricity produced from cellulose nanocomposites may lead to more efficient and biodegradable nanogenerators.

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Section: Resultsmentioning

confidence: 99%

Advanced Cellulose–Nanocarbon Composite Films for High-Performance Triboelectric and Piezoelectric Nanogenerators

et al. 2023

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“…7. The equivalent circuit of a piezoelectric material [35,36] The rectifier stage, was composed by the diodes bridge made by diodes with reference 1N5817, and capacitance = 10µF.…”

Section: Simulation Conditionsmentioning

confidence: 99%

A large bande frequencies AC/DC SSHIC Electrical Interface for Piezoelectric Sensors and Energy Harvesting

Youssef

Sabani

Aymen

et al. 2023

Preprint

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The harvesting energy from the vibration of piezoelectric beam or membrane producing an alternating voltage, requires a passive AC/DC converter to avoid energy losses, and to adapt the electrical signal to the input parameters (voltage, current). The objective of this work is to demonstrate a complete AC/DC converter autonomous system which is powered by a piezoelectric energy harvester. Accordingly, the proposed rectifier has several advantages in terms of efficiency, compatibility, circuit simplicity, and integration into various systems. The AC-DC converter for piezoelectric energy harvesting applications presented in this paper is an improved version of the Synchronized Switch Harvesting on Inductor Corrected (SSHIC) Converter. This modified version provides better results of up to 56% for technology parallel SSHIC-p and 51% for technology series SSHIC-s compared to input power. In addition, it is better in terms of efficiency more than 220% compared to the bridge rectifier with relatively stable output despite varying conditions. In addition, the structures vibrating in sinusoidal or pseudo sinusoidal mode, thus being able to be modeled by a second order. This model is well suited to broadband stresses of multimodal structures.

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“…The use of chitosan films in composite applications has the potential to enhance the mechanical and thermal properties of the composite, making it more resilient and reliable. Therefore, understanding the mechanical and thermal properties of chitosan films is critical in developing sustainable and efficient composite materials for various industrial applications [29][30][31][32][33][34][35][36][37][38][39][40].…”

Section: Introductionmentioning

confidence: 99%

Extraction and Physicochemical Characterization of an Environmentally Friendly Biopolymer: Chitosan for Composite Matrix Application

et al. 2023

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Chitosan, which is a derivative of chitin, is particularly popular due to its biodegradable and renewable nature. However, the properties of chitosan can be inconsistent due to the extraction process and its natural origin, which poses a challenge to its use in composite materials as a matrix. The properties of chitosan can be tuned by controlling the degree of deacetylation (the extent to which acetyl groups are removed from chitin to form chitosan) and molecular weight. This paper presents a detailed study on the extraction and characterization of chitosan from shrimp shells. The structural thermal and mechanical characterization were studied using several techniques: Fourier-transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis and differential scanning calorimetry. The intrinsic viscosity and deacetylation degree were determined using various methods. The results showed an average degree of deacetylation of 77%. The chitosan films exhibited a high tensile strength of 43.9 MPa and an elongation at break of 3.14%. The thermal analysis revealed that the films had a glass transition temperature of 88 °C and a maximum thermal degradation temperature of 320 °C. The findings of this research could contribute to the development of chitosan-based materials with improved properties, leading to its wider adoption in the future for composite matrix application. The simple and efficient method used for the extraction and purification of chitosan from shrimp shells makes it a cost-effective and eco-friendly alternative to synthetic polymers.

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Piezoelectric and Electromechanical Characteristics of Porous Poly(Ethylene-co-Vinyl Acetate) Copolymer Films for Smart Sensors and Mechanical Energy Harvesting Applications

Cited by 16 publications

References 43 publications

Advanced Cellulose–Nanocarbon Composite Films for High-Performance Triboelectric and Piezoelectric Nanogenerators

Advanced Cellulose–Nanocarbon Composite Films for High-Performance Triboelectric and Piezoelectric Nanogenerators

A large bande frequencies AC/DC SSHIC Electrical Interface for Piezoelectric Sensors and Energy Harvesting

Extraction and Physicochemical Characterization of an Environmentally Friendly Biopolymer: Chitosan for Composite Matrix Application

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