Evaluation of dynamic mechanical properties of teflon fabric reinforced artificial muscle material

Yesaswi, Ch Sridhar; Sreekanth, P.S. Rama

doi:10.1016/j.matpr.2020.01.262

Cited by 5 publications

(5 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The enhancement of strength in the polymer is attributed to its crystalline phase, which is characterized by more significant intermolecular bonding [ 19 ]. Thus, in addition to the presence of crystallinity in Nafion, Figure 5 a demonstrates that the incorporation of copper and silver through electroless plating into Nafion membranes enhanced their strength by 50% in comparison with the pure membrane [ 20 ]. This can be attributed to the strong adhesion between the metal particles and the membrane surface, which is facilitated by the attraction between positive and negative charged ions.…”

Section: Resultsmentioning

confidence: 99%

Fabrication and Characterization of Cu2+-Driven PTFE-Reinforced Artificial Muscle Polymer Membrane for Water Purification and Energy Harvesting Applications

Avvari,

Sreekanth

2023

Membranes

View full text Add to dashboard Cite

Ionic polymer membranes have not yet gained widespread practical application in areas such as water purification and energy harvesting due to their high cost and tendency to swell. The present study involved the fabrication of reinforced textile structures composed of polytetrafluoroethylene (PTFE)-reinforced Nafion membranes coated with non-precious metals, copper and silver, as a surface electrode by applying a chemical decomposition technique. Several mechanical, contact angle measurement and dielectric tests were conducted on membranes to evaluate their mechanical, wettability and conductivity properties. From scanning electron microscopy, it is clear that the formation of surface electrodes with uniform dispersion of metal particles. Scratch test reveals the adhesive strength between the coated metal particles and membrane. The silver-activated copper-coated membrane has a high contact angle of 121°. Thus, the fabricated membranes can have good antibacterial and adsorption properties for water treatment. The copper-coated membrane has a high Young’s modulus of 779 ± 80 MPa and a tensile strength of 29.1 ± 8 MPa, whereas the elongation at break is more for silver-activated copper-coated samples recorded as 158 ± 4%. The viscoelastic behavior of the membranes was analyzed through dynamic mechanical analysis (DMA). A sharp rise in the storage modulus (E′) value of 4.8 × 1010 Pa at ~80 °C at a frequency of 1 Hz on metal surface electrodes signifies an improvement in the strength of the material in comparison to the initial pure membrane. The successful enhancement of conductivity on the membrane surface via chemical deposition on the silver-activated membrane is 1 × 10−4 (S/cm) and holds great potential for facilitating voltage transmission through the tribolayer in the nanogenerators.

show abstract

Section: Resultsmentioning

confidence: 99%

Fabrication and Characterization of Cu2+-Driven PTFE-Reinforced Artificial Muscle Polymer Membrane for Water Purification and Energy Harvesting Applications

Avvari,

Sreekanth

2023

Membranes

View full text Add to dashboard Cite

show abstract

“…5 (f)). It can lead to the deterioration of strength, elastic behavior, and other mechanical properties of the membrane 25 . Therefore, to avoid membrane degradation, the OT value should be controlled below 378 K. Measures to improve dynamic performance According to the above discussion, we can conclude that overload running may lead to the formation of high Tloc at cathode CL|PEM interface, which will further cause membrane dehydration and eventually result in the increase of ohmic polarization voltage loss.…”

Section: Dynamic Response Under Fc-dlcmentioning

confidence: 99%

Modeling Water and Thermal Transients Inside Proton Exchange Membrane for Vehicle Application Fuel Cells

Wang

Tang

et al. 2021

ECS Trans.

View full text Add to dashboard Cite

Proton exchange membrane fuel cell (PEMFC) is a potential candidate as the power source for vehicle application. However, problems related to water and thermal management must be resolved before their large-scale promotion. Numerical models are often used as powerful tools to describe the electrochemical and transport phenomena occurring in PEMFC, which are important to water and thermal management. In this study, two-phase, non-isothermal, transient models are employed to research the local dynamic characteristics inside PEMFC under road driving conditions and different operating conditions. The simulation results indicate that overload running often causes local high temperature, which can lead to membrane dehydration, voltage loss, and power overshoot as load increases. If the temperature is above the glass transition temperature of the membrane, it will even lead to membrane mechanical degradation. According to our research, controlling the operating temperature below 378 K and reducing the coolant temperature in advance are the effective ways to prevent the aforementioned attenuation.

show abstract

“…Among these, chemical approaches stand out, involving treatments employing hydrophilic agents through various application methods such as dip coating, spin coating, or spray coating. Conversely, physical techniques like plasma treatment and electron beam irradiation offer nuanced precision in effecting surface alterations [14][15][16][17]. It is essential to underscore that, irrespective of the chosen fabrication method, meticulous oversight over the morphology and dimensions of microscopic and nanoscopic entities on the surface remains paramount.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Wettability and Adhesive Property of PTFE through Surface Modification with Fluorinated Compounds

Asrafali,

Periyasamy,

Kim

et al. 2024

Materials

View full text Add to dashboard Cite

Polytetrafluoroethylene (PTFE) is prized for its unique properties in electrical applications, but its natural hydrophobicity poses challenges as it repels water and can cause electrical short circuits, shortening equipment lifespan. In this work, the mentioned issue has been tackled by using two different fluorinated compounds, such as perfluorooctanoic acid (PFOA)/perfluorooctanol (PFOL), along with plasma processing to enhance the surface hydrophilicity (water attraction) of PTFE. This method, demonstrated on Teflon membrane, quickly transformed their surfaces from hydrophobic to hydrophilic in less than 30 s. The treated films achieved a water contact angle saturation of around 80°, indicating a significant increase in water affinity. High-resolution C 1s X-ray photoelectron spectroscopy (XPS) confirmed the formation of new bonds, such as -COOH and -OH, on the surface, responsible for enhanced hydrophilicity. Extended plasma treatment led to further structural changes, evidenced by increased intensity in infrared (IR) and Raman spectra, particularly sensitive to vibrations associated with the C-F bond. Moreover, Attenuated Total Reflectance Fourier-Transform Infrared Spectroscopy (ATR-FTIR) showed the formation of surface-linked functional groups, which contributed to the improved water attraction. These findings decisively show that treatment with fluoro-compound along with plasma processing can be considered as a highly effective and rapid method for converting PTFE surfaces from hydrophobic to hydrophilic, facilitating its broader use in various electrical applications.

show abstract

Evaluation of dynamic mechanical properties of teflon fabric reinforced artificial muscle material

Cited by 5 publications

References 21 publications

Fabrication and Characterization of Cu2+-Driven PTFE-Reinforced Artificial Muscle Polymer Membrane for Water Purification and Energy Harvesting Applications

Fabrication and Characterization of Cu2+-Driven PTFE-Reinforced Artificial Muscle Polymer Membrane for Water Purification and Energy Harvesting Applications

Modeling Water and Thermal Transients Inside Proton Exchange Membrane for Vehicle Application Fuel Cells

Enhanced Wettability and Adhesive Property of PTFE through Surface Modification with Fluorinated Compounds

Contact Info

Product

Resources

About