Improved performance of a polymer nanogenerator based on silver nanoparticles doped electrospun P(VDF–HFP) nanofibers

Bacterial attachment and fouling compromise material performance in applications ranging from marine equipment and biomedical devices to water treatment systems. For membrane‐based water treatment systems, bacterial attachment and biofilm formation decrease water purification efficiency and reduces mechanical durability of the membranes. In this work, we present a concurrent electrospinning and copolymerization approach to engineer composite nanofiber membranes comprising of silver nanoparticle containing poly(vinylidene fluoride‐co‐hexafluoropropylene) (PVDF‐HFP‐Ag) nanofibers and [copolymerized zwitterionic sulfobetaine methacrylate‐methacryl polyhedral oligomeric silsesquioxane]‐poly(methyl methacrylate) nanofibers. We characterized the surface morphology, topography, material chemistry, and wettability of the nanofiber membranes with scanning electron microscopy, atomic force microscopy, Fourier transform infrared spectroscopy, and contact angle measurements. We then challenged these nonwoven membranes with two model microbes, Gram‐negative Pseudomonas aeruginosa and Gram‐positive Staphylococcus aureus, and found that the silver‐zwitterionic composite nanofiber membrane exhibited superior bacterial fouling resistance by reducing >90% of bacterial attachment when compared to neat PVDF‐HFP and PVDF‐HFP‐Ag nanofiber membranes. This study demonstrates that concurrent electrospinning enables free‐standing nanofiber membranes with sustained bacterial fouling resistance, with potential in applications in filtration and water treatment technologies for which antifouling strategies are imperative. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47580.

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“…AgNPs were synthesized by chemical reduction approach as described in eq.

HCON {({CH}_{3})}_{2} + 2 {AgNO}_{3} + H_{2} normalO = 2 {Ag}^{o} + {({CH}_{3})}_{2} NCOOH + 2 {HNO}_{3}

…”

Section: Resultsmentioning

confidence: 99%

Engineering silver‐zwitterionic composite nanofiber membrane for bacterial fouling resistance

Ganesh

Kundukad

Cheng

et al. 2019

J of Applied Polymer Sci

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“…While at the presence of polar solvent in typical aqueous solution, the solvent molecules solvated the ions can screen the interaction among the ions and thus lower the Q* value and thus the Seebeck coefficient. [38][39][40][41] The structures of α, β, and amorphous PVDF-HFP are shown in Figure S9 the neat PVDF-HFP film. [11] The solvent screening is weak when the solvent is less polar.…”

Section: Discussionmentioning

confidence: 99%

Flexible Quasi‐Solid State Ionogels with Remarkable Seebeck Coefficient and High Thermoelectric Properties

Cheng

Fan

et al. 2019

Advanced Energy Materials

240

269

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Thermoelectric materials can be used to harvest low‐grade heat that is otherwise dissipated to the environment. But the conventional thermoelectric materials that are semiconductors or semimetals, usually exhibit a Seebeck coefficient of much less than 1 mV K−1. They are expensive and consist of toxic elements as well. Here, it is demonstrated environmental benign flexible quasi‐solid state ionogels with giant Seebeck coefficient and ultrahigh thermoelectric properties. The ionogels made of ionic liquids and poly(vinylidene fluoride‐co‐hexafluoropropylene) (PVDF‐HFP) can exhibit a giant Seebeck coefficient up to 26.1 mV K−1, the highest for electronic and ionic conductors. In addition, they have a high ionic conductivity of 6.7 mS cm−1 and a low thermal conductivity of 0.176 W m−1 K−1. Their thermoelectric figure of merit (ZT) is thus 0.75. The giant Seebeck coefficient is related to the ion‐dipole interaction between PVDF‐HFP and ionic liquids. Their application in ionic thermoelectric capacitors is also demonstrated for the conversion of intermittent heat into electricity. They are especially important to harvest the low‐grade thermal energy that is abundant on earth.

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“…For example, it was reported that doping electrospun poly(vinylidene fluorideco-hexafluoropropylene)(P(VDF-HFP))/graphene nanofibers with Eu3+ enhanced the crystallinity of the piezoelectric β phase of the polymer for sensing applications [103]. Other doping mechanisms, including the use of metallic inclusions, such as silver nanoparticles have also been reported [104]. Furthermore, future research of this field will benefit from progress in the discovery of new piezoelectric polymeric systems and crystalline phases, both synthetic and natural, that may find use in both piezoelectric and triboelectric energy harvesters, Cellulose, for example, is an abundant and common natural polymer can be found from cell walls of green plants, and it has recently been incorporated as piezo-or tribo-active materials for energy harvesting applications [105][106][107][108].…”

Section: Discussionmentioning

confidence: 99%

Nanostructured polymer-based piezoelectric and triboelectric materials and devices for energy harvesting applications

Jing

Kar‐Narayan

2018

J. Phys. D: Appl. Phys.

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Harvesting energy from ambient mechanical sources in our environment has attracted considerable interest due to its potential to power applications such as ubiquitous wireless sensors and Internet of Things devices. In this context, piezoelectric and/or triboelectric materials offer a relatively simple means of directly converting mechanical energy from ubiquitous ambient vibrating sources into electrical power for microscale/nanoscale device applications. In particular, nanoscale energy harvesters, or nanogenerators, are capable of converting low-level ambient vibrations into electrical energy, thus are vital to the realization of the next generation of self-powered devices. Polymer-based nanogenerators are attractive as they are inherently flexible and robust, making them less prone to mechanical failure which is a key requirement for vibrational energy harvesters. They are also lightweight, easy and cheap to fabricate, lead-free and biocompatible, but in many cases their energy harvesting performance is found lacking in comparison to more commonly studied inorganic materials. Recent advances have been made in developing scalable nanofabrication techniques for flexible and low-cost polymer-based nanogenerators with improved energy conversion efficiency, including the incorporation of high-quality polymer nanowires with enhanced crystallinity, piezoelectric and/or surface charge properties. In this review, we discuss aspects of nanomaterials growth and energy harvester device design, including those involving nanowires of polymers of polyvinylidene fluoride and its co-polymers, nylon-11, and poly-lactic acid for scalable piezoelectric and triboelectric nanogenerator applications, as well as the design and performance of polymer-ceramic nanocomposite nanogenerators. In particular, we highlight the effects of growth parameters, nanoconfinement, self-poling, surface polarization, crystalline phases, and device assembly on the energy harvesting performance of a range of recently reported nanostructured polymer-based materials and devices.

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Improved performance of a polymer nanogenerator based on silver nanoparticles doped electrospun P(VDF–HFP) nanofibers

Cited by 135 publications

References 21 publications

Engineering silver‐zwitterionic composite nanofiber membrane for bacterial fouling resistance

Engineering silver‐zwitterionic composite nanofiber membrane for bacterial fouling resistance

Flexible Quasi‐Solid State Ionogels with Remarkable Seebeck Coefficient and High Thermoelectric Properties

Nanostructured polymer-based piezoelectric and triboelectric materials and devices for energy harvesting applications

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