Study of polylactic acid electret by dielectric spectroscopy

Galikhanov, E. M.; Lounev, Ivan; Гужова, А А; Gusev, Yu. A.; Галиханов, М. Ф.; Vasilyeva, M. A.

doi:10.1063/1.4944288

Cited by 5 publications

(5 citation statements)

References 17 publications

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“…PLA has insufficient electret properties-low initial surface potential value and fast charge relaxation (Galikhanov et al 2016;Gencheva et al 2010;Zhang et al 2020). Polar groups of the polymer promote trapping of the injected charge carriers by small shallow traps which results in a fast charge decay of the corona electrets.…”

Section: Resultsmentioning

confidence: 99%

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Studying properties of corona electret based on compositions of polylactic acid and bentonite

Zagidullina

Kamalova

Галиханов

et al. 2021

Physics of Complex Systems

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The study focuses on the composites of polylactic acid and bentonite as well as corona electrets based on them. The paper explores rheological, electrical, physical and mechanical properties of the composites as well as the effect of corona charging on their properties. Differential scanning calorimetry was used to assess transition temperatures in the compositions. Surface potential, electric field strength and effective surface charge density were measured. Optimal performance was shown by the compositions of polylactic acid with 4% bentonite.

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Section: Resultsmentioning

confidence: 99%

“…(Galikhanov et al 2014;Kestelman et al 2000;Sessler 1998). In this context production of electret material based on polylactic acid is promising (Galikhanov et al 2016;Gencheva et al 2010;Zhang et al 2020). However, unipolar corona discharge as the fastest and simplest method to obtain an electret is not suitable for polar polylactic acid.…”

Section: Introductionmentioning

confidence: 99%

Studying properties of corona electret based on compositions of polylactic acid and bentonite

Zagidullina

Kamalova

Галиханов

et al. 2021

Physics of Complex Systems

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“…In the selection of materials, we adopted PLA as the printing material. Although its polarization effect may be limited compared with fluoropolymers [21], 3D-printed PLA has stronger mechanical properties, including elastoplastic and orthotropic behavior, as well as compression and tension asymmetry [23]. The physical properties of PLA are illustrated in Table 1, and the process variables are illustrated in Table 2.…”

Section: Methodsmentioning

confidence: 99%

Synchronized 3D Printing and Corona Charging for One-Step Prototyping of Polarized Polylactic Acid Electrets

Wang

Song

et al. 2023

Polymers

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Three-dimensional (3D) printing technology is advantageous in the fast prototyping of complex structures, but its utilization in functional material fabrication is still limited due to a lack of activation capability. To fabricate and activate the functional material of electrets, a synchronized 3D printing and corona charging method is presented to prototype and polarize polylactic acid electrets in one step. By upgrading the 3D printer nozzle and incorporating a needle electrode to apply high voltage, parameters such as needle tip distance and applied voltage level were compared and optimized. Under different experimental conditions, the average surface distribution in the center of the samples was −1498.87 V, −1115.73 V, and −814.51 V. Scanning electron microscopy results showed that the electric field contributes to keeping the printed fiber structure straight. The polylactic acid electrets exhibited relatively uniform surface potential distribution on a sufficiently large sample surface. In addition, the average surface potential retention rate was improved by 12.021-fold compared to ordinary corona-charged samples. The above advantages are unique to the 3D-printed and polarized polylactic acid electrets, proving that the proposed method is suitable for quickly prototyping and effectively polarizing the polylactic acid electrets simultaneously.

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“…Previous research has demonstrated the electret and piezoelectric properties in PLA-based polymers. [24][25][26] So far, the first fully biodegradable PLA-based piezoelectric pressure sensor has been developed to control physiological forces. [27] Our previous work reported the feasibility of fabricating high-performance ferroelectrets with degradable PLA resins by utilizing a preparation procedure that is compatible with an industrial large-scale continuous production line and some preliminary but crucial experimental results.…”

Section: Introductionmentioning

confidence: 99%

“…Previous research has demonstrated the electret and piezoelectric properties in PLA‐based polymers. [ 24–26 ] So far, the first fully biodegradable PLA‐based piezoelectric pressure sensor has been developed to control physiological forces. [ 27 ]…”

Section: Introductionmentioning

confidence: 99%

Biodegradable and Bioabsorbable Polylactic Acid Ferroelectrets with Prominent Piezoelectric Activity

Zhukov

Seggern

et al. 2023

Adv Elect Materials

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Ferroelectrets have promoted a variety of exciting flexible sensors, actuators, and microenergy harvesters. However, most ferroelectrets have been fabricated from non‐degradable petro‐based resins, and thus the recycling of these materials constitutes a big challenge. This article reports biodegradable and bioabsorbable ferroelectret films made from polylactic acid (PLA) resins for highly sensitive transducer applications, which can operate either in piezoelectric 33 or 31/32 mode. By modification of the microstructure and polarization, pronounced longitudinal and transverse piezoelectric activities are realized in a single material. For samples with a thickness of 400 µm and a bulk density of 350 kg m−3, the Young's moduli in thickness and plane direction are ranging from 0.1 to 10 MPa, respectively. After polarization in the thickness direction, quasi‐static piezoelectric d33, g33, d31 (d32), and g31 (g32) coefficients in the PLA films, up to 500 pC N−1, 40 Vm N−1, −44 pC N−1, and −3.6 Vm N−1, are achieved, respectively. The longitudinal piezoelectric coefficients of the PLA films are comparable to non‐degradable polymer ferroelectrets, while the transverse piezoelectric activity is superior, which may be attributed to the reduction of Young's moduli in the plane direction. The preparation procedure of the PLA ferroelectrets is compatible with large‐scale production lines and thus can greatly promote their applications in green electronics.

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Study of polylactic acid electret by dielectric spectroscopy

Cited by 5 publications

References 17 publications

Studying properties of corona electret based on compositions of polylactic acid and bentonite

Studying properties of corona electret based on compositions of polylactic acid and bentonite

Synchronized 3D Printing and Corona Charging for One-Step Prototyping of Polarized Polylactic Acid Electrets

Biodegradable and Bioabsorbable Polylactic Acid Ferroelectrets with Prominent Piezoelectric Activity

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