Improvement of polylactic acid electret properties by addition of fine barium titanate

Гужова, А А; Галиханов, М. Ф.; Gorokhovatsky, Yu.A.; Temnov, Dmitry; Fomicheva, Elena; Karulina, Elena A.; Yovcheva, T.

doi:10.1016/j.elstat.2015.11.002

Cited by 29 publications

(16 citation statements)

References 24 publications

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“…It has been known that the charge storage capacity of electret materials is related to charge traps which prohibit or restrain charge drift through surface and/or bulk . Consequently, the crystalline and morphology structure to produce charge traps play an important role …”

Section: Introductionmentioning

confidence: 99%

Electret characteristics of melt‐blown polylactic acid fabrics for air filtration application

Zhang

Chen

Bhat

et al. 2019

J of Applied Polymer Sci

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Polylactic acid (PLA) is a biodegradable and biocompatible polymer. Melt‐blown PLA electret fabrics have become attractive materials for air filter applications. Its filtration performance mainly depends on the electrostatic effect originating from electrets. How to improve their electret behavior and then to enhance their filtration efficiency has always been challenging. In this article, three melt‐blown PLA fabrics with different morphological or crystal structure are made from different process conditions or ingredient. The electrets are formed by means of corona charging technology. Their crystalline and morphological structure was analyzed, and filtration performance was measured. Their charge‐trapping feature was studied by thermal stimulating discharge technology. The results proved that the air filtration efficiency of three melt‐blown samples improved a lot when electrets were formed. Different crystalline structures of PLA fabrics will result in differences in their electret charge‐trapping feature. The PLA fabrics with semi‐crystalline characteristics display a regular charge‐trapped level distribution and amorphous structure hints the diversity of charge‐trapped levels. The deference in filtration resistance is mainly ascribed to the different fiber diameters and their distributions. More narrow distribution of fiber diameter leads to more compact fabrics and to higher filtration resistance. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48309.

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Section: Introductionmentioning

confidence: 99%

Electret characteristics of melt‐blown polylactic acid fabrics for air filtration application

Zhang

Chen

Bhat

et al. 2019

J of Applied Polymer Sci

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“…Moreover, it has been reported that fillers addition results in enhanced polymer composites electret properties and charge stability . For example, the stability of PVDF electret can be strongly influenced by CaCO 3 and nanoclay addition.…”

Section: Resultsmentioning

confidence: 99%

“…Second, the fillers can induce the Maxwell–Wagner–Sillar polarization at the PVDF boundary via conductivity difference through various phases . Third, the physical adsorption of PVDF on the solid filler surface decreases chain mobility resulting in a more stable electromechanical response via lower relaxation rates . Finally, the voids generated in each case by the fillers (Figures and ) hinder the drift/depolarization process by increasing the path length for the carriers across the film …”

Section: Resultsmentioning

confidence: 99%

“…Typically, this dependence may arise from the degree of polymer crystallinity, polarity of both polymer and gas, polymer thermal history, gas molecular size, as well as the inflation parameters such as pressure, temperature, and treatment time. While nonpolar ferroelectrets, such as polypropylene (PP), poly(ethylene terephthalate) (PET), fluoroethylene propylene (FEP), and polyethylene naphthalate (PEN), exhibited satisfactory inflation behavior either with N 2 or CO 2 , the inflation behavior of polar polymer foams, such as poly(vinylidene) (PVDF) or polylactic acid (PLA), is still not clear and requires a fundamental understanding of the interaction between the polymer matrix and the inflation gas.…”

Section: Introductionmentioning

confidence: 99%

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Thermally stable cellular poly(vinylidene) ferroelectrets: Optimization of CO₂ driven inflation process

Jahan

Mighri

Rodrigue

et al. 2019

J of Applied Polymer Sci

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Electrically charged cellular ferroelectrets can show excellent thermally stable piezoelectric activity and are therefore progressively used in electrochemical transducers. Given that an optimized cellular structure is a key for improving charge density and the associated piezoelectric properties in this material, we investigated the influence of CO2 inflation treatment using various gas diffusion expansion or inflation procedures on the piezoelectric d33 coefficient and thermal stability of cellular poly(vinylidene) ferroelectrets and compare with the results (partially) obtained by N2 inflation as reported in our previous study (Jahan, Mighri, Rodrigue, Ajji, J. Appl. Polym. Sci. 2019, 136, 47540). Samples were prepared using the conventional extrusion–stretching–inflation–corona charging method. Maximum d33 coefficient for CO2‐inflated samples is found to be around 30% higher than that of N2‐inflated samples (327 pC/N compared to 251 pC/N) by stepwise pressure application method. The key parameters addressed in the inflation procedures are the changes in sample thickness, morphology, and the void‐height distribution in both gas treatments. The ferroelectrets show excellent thermal stability for up to 4 days at 90, 110, and 120 °C in both treatments with a slightly improved performance in CO2 gas. The higher activation energy of CO2‐inflated samples (0.52 eV) than the N2‐inflated ones (0.43 eV) further confirms the stability data. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47929.

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“…3a-b). The top surface of gPLA is oxidized leading to a surface polarization [38,39]. Upon releasing the mechanical force, the negatively charged Teflon sheet relaxes to its initial configuration, and further polarizes the bottom gPLA electrode leading to a measurable mean potential difference > 1.5 kV (Fig.…”

Section: Resultsmentioning

confidence: 99%

A Wireless Triboelectric Nanogenerator

Mallineni

Dong

Behlow

et al. 2017

Advanced Energy Materials

121

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Abstract:We demonstrate a new paradigm for the wireless harvesting of mechanical energy via a 3D-printed triboelectric nanogenerator (TENG) which comprises a graphene polylactic acid (gPLA) nanocomposite and Teflon. The synergistic combination of eco-friendly PLA with graphene in our TENG exhibited an output voltage > 2 kV with an instantaneous peak power of 70 mW, which in turn generated a strong electric field to enable the wireless transmission of harvested energy over a distance of 3 m. Specifically, we demonstrate wireless and secure actuatation of smart-home applications such as smart tint windows, temperature sensors, liquid crystal displays, and security alarms either with a single or a specific user-defined passcode of mechanical pulses (e.g., Fibonacci sequence). Notably, such high electric output of a gPLA-based TENG enabled unprecedented wireless transmission of harvested mechanical energy into a capacitor, thus obviating the need for 2 additional electronics or energy sources. The scalable additive manufacturing approach for gPLA-based TENGs, along with their high electrical output can revolutionize the present method of harnessing the mechanical energy available in our environment.

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Improvement of polylactic acid electret properties by addition of fine barium titanate

Cited by 29 publications

References 24 publications

Electret characteristics of melt‐blown polylactic acid fabrics for air filtration application

Electret characteristics of melt‐blown polylactic acid fabrics for air filtration application

Thermally stable cellular poly(vinylidene) ferroelectrets: Optimization of CO₂ driven inflation process

A Wireless Triboelectric Nanogenerator

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Improvement of polylactic acid electret properties by addition of fine barium titanate

Cited by 29 publications

References 24 publications

Electret characteristics of melt‐blown polylactic acid fabrics for air filtration application

Electret characteristics of melt‐blown polylactic acid fabrics for air filtration application

Thermally stable cellular poly(vinylidene) ferroelectrets: Optimization of CO2 driven inflation process

A Wireless Triboelectric Nanogenerator

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Product

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Thermally stable cellular poly(vinylidene) ferroelectrets: Optimization of CO₂ driven inflation process