Fabrication and characterization of a biocompatible hybrid film based on silver nanoparticle/ethyl cellulose polymer

Melo, Martín Édgar Reyes; Miranda-Valdez, Isaac Yair; Puente-Córdova, Jesús Gabino; Camarillo-Hernández, Carlos Adrián; López-Walle, Beatriz

doi:10.1007/s10570-021-04066-4

Cited by 11 publications

(8 citation statements)

References 45 publications

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“…Samples were manufactured in the form of a thin film from solutions of ethyl cellulose EC with an average molecular weight of 135,000 g/mol (Dow Chemicals, Rochester, NY, USA) in tetrahydrofuran (THF, 99%, Sigma-Aldrich, St. Louis, MO, USA) as a solvent. A concentration of 10% by weight was used, ensuring an appropriate film manufacture [ 2 ]. To guarantee the dissolution process, the EC–THF mixture was stirred at 700 rpm for 1 h, at 313 K. The solutions obtained were subjected to a tape casting process (this process controls the film thickness) on a polytetrafluoroethylene (PTFE) surface, to separate the solvent by natural convection, at room temperature for 24 h. The EC films obtained were stored in a desiccator for later use.…”

Section: Methodsmentioning

confidence: 99%

“…Ethyl cellulose (EC) is a biopolymer cellulose derivative whose main applications are in the pharmaceutical and food industries [ 1 , 2 , 3 , 4 ]. From the electrical point of view, EC has applications as a binder in printing pastes, electrets, and thermoelectric materials [ 5 , 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

“…The properties of the resulting EC will depend on the degree of substitution of the ethyl ether group. Among the diverse types of EC synthesized, the most used in industrial sectors is that with a degree of ethyl ether substitution between 2.4 and 2.5 [ 2 , 8 ]. This substitution degree provides important properties, for example, water resistance and solubility in polar and non-polar solvents, and certain azeotropic mixtures.…”

Section: Introductionmentioning

confidence: 99%

“…They evaluated the thermoelectrical properties of the films, tuning the electrical response with heteroatoms, so that the material simultaneously demonstrated the highest possible value of electrical conductivity and Seebeck coefficient while restricting the thermal conductivity value to its minimum. More recently, Reyes-Melo et al [ 2 ] fabricated and synthesized hybrid films with silver nanoparticles into an ethyl cellulose matrix. The authors studied the mechanical and dielectric relaxations of these films and found a remarkable interaction between the nanoparticles and the chemical groups of the organic matrix.…”

Section: Introductionmentioning

confidence: 99%

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Electrical Conduction Mechanisms in Ethyl Cellulose Films under DC and AC Electric Fields

Puente-Córdova,

Luna-Martínez,

Mohamed-Noriega

et al. 2024

Polymers

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This work reports the dielectric behavior of the biopolymer ethyl cellulose (EC) observed from transient currents experiments under the action of a direct current (DC) electric field (~107 V/m) under vacuum conditions. The viscoelastic response of the EC was evaluated using dynamic mechanical analysis (DMA), observing a mechanical relaxation related to glass transition of around ~402 K. Furthermore, we propose a mathematical framework that describes the transient current in EC using a fractional differential equation, whose solution involves the Mittag–Leffler function. The fractional order, between 0 and 1, is related to the energy dissipation rate and the molecular mobility of the polymer. Subsequently, the conduction mechanisms are considered, on the one hand, the phenomena that occur through the polymer–electrode interface and, on the other hand, those which manifest themselves in the bulk material. Finally, alternating current (AC) conductivity measurements above the glass transition temperature (~402 K) and in a frequency domain from 20 Hz to 2 MHz were carried out, observing electrical conduction described by the segmental movements of the polymeric chains. Its electrical properties also position EC as a potential candidate for electrical, electronics, and mechatronics applications.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Electrical Conduction Mechanisms in Ethyl Cellulose Films under DC and AC Electric Fields

Puente-Córdova,

Luna-Martínez,

Mohamed-Noriega

et al. 2024

Polymers

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“…Considering this knowledge, in this study we investigate the thermal and dielectric response of polyvinyl butyral (PVB). We are interested in this polymer due to its potential applications, such as for hybrid magnetic materials and nanocomposites, another topic of our research group [ 16 , 17 , 18 ]. PVB is a polyacetal considered as an amorphous random copolymer with viscoelastic properties and optical clarity, suitable for use in the manufacture of safety glass laminates, especially in automotive and architectural glass [ 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Dielectric and Viscoelastic Behavior of Polyvinyl Butyral Films

Puente-Córdova,

Rentería-Baltiérrez,

López-Walle

et al. 2023

Polymers

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Dielectric and thermal properties of polyvinyl butyral (PVB) were studied in this work, using dynamic electrical analysis (DEA) at frequencies from 100 Hz to 1 MHz and temperatures from 293 K to 473 K. Two electrical relaxation processes were investigated: glass transition and interfacial polarization. Above the glass transition temperature (~343 K), interfacial polarization dominates conductive behavior in polyvinyl butyral. The framework of the complex electric modulus was used to obtain information about interfacial polarization. The viscoelastic behavior was analyzed through dynamic mechanical analysis (DMA), where only the mechanical manifestation of the glass transition is observed. The experimental results from dielectric measurements were analyzed with fractional calculus, using a fractional Debye model with one cap-resistor. We were successful in applying the complex electric modulus because we had a good correlation between data and theoretical predictions. The fractional order derivative is an indicator of the energy dissipated in terms of molecular mobility, and the calculated values close to 1 suggest a conductive behavior at temperatures above the glass transition temperature of PVB.

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Biocompatible Material‐Based Flexible Biosensors: From Materials Design to Wearable/Implantable Devices and Integrated Sensing Systems

Liu

Batool

et al. 2023

Small

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Human beings have a greater need to pursue life and manage personal or family health in the context of the rapid growth of artificial intelligence, big data, the Internet of Things, and 5G/6G technologies. The application of micro biosensing devices is crucial in connecting technology and personalized medicine. Here, the progress and current status from biocompatible inorganic materials to organic materials and composites are reviewed and the material‐to‐device processing is described. Next, the operating principles of pressure, chemical, optical, and temperature sensors are dissected and the application of these flexible biosensors in wearable/implantable devices is discussed. Different biosensing systems acting in vivo and in vitro, including signal communication and energy supply are then illustrated. The potential of in‐sensor computing for applications in sensing systems is also discussed. Finally, some essential needs for commercial translation are highlighted and future opportunities for flexible biosensors are considered.

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Fabrication and characterization of a biocompatible hybrid film based on silver nanoparticle/ethyl cellulose polymer

Cited by 11 publications

References 45 publications

Electrical Conduction Mechanisms in Ethyl Cellulose Films under DC and AC Electric Fields

Electrical Conduction Mechanisms in Ethyl Cellulose Films under DC and AC Electric Fields

Dielectric and Viscoelastic Behavior of Polyvinyl Butyral Films

Biocompatible Material‐Based Flexible Biosensors: From Materials Design to Wearable/Implantable Devices and Integrated Sensing Systems

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