Charge Relaxation and Kinetic Accumulation of Non-woven Polypropylene and Polyimide Films

Borisova, M. E.; Kamalov, Almaz; Jayasinghe, Nilan; Chiriateva, Aleksandra

doi:10.1109/elconrus54750.2022.9755471

Cited by 1 publication

(1 citation statement)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The PP substrate was also tested after exposure to the same electrospinning conditions as the polymer solutions for up to 5 min and provided a small but measurable charge retention, indicating that the substrate can also get small residual charges in an agreement with previous studies. 40 , 41 A sample of 25 GSM of pure PHBV deposited on the PP substrate was also produced, delaminated from the PP and tested for residual charges 24 h after and showed no charges. Furthermore, the grammages at which the residual charges were first observed in the samples deposited on Al foil coincided with the grammages at which the rugosity began to be detected, that is, 7.8 GSM in Figure 3 .…”

Section: Resultsmentioning

confidence: 99%

Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) Electrospun Nanofibers Containing Natural Deep Eutectic Solvents Exhibiting a 3D Rugose Morphology and Charge Retention Properties

et al. 2023

View full text Add to dashboard Cite

In the present study, electrospun nanofibers of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV), a biodegradable polyester, containing natural deep eutectic solvents (NADES) were obtained and reported for the first time, exhibiting an unreported 3D morphology and enhanced charge retention properties. Choline chloride (ChCl)/urea/water in a molar ratio of 1:2:1 was used as the NADES model system. Electrospun nanofibers were produced from a 10 wt % solution of PHBV containing 26 wt % NADES with respect to the polymer and were deposited on different substrates, that is, aluminum foil and non-woven spunbond polypropylene (PP). The morphology and charge retention ability were characterized under different conditions and on different substrates. The attained fiber morphology for the NADES-containing mats showed an average fiber diameter of around 300 nm, whereas the pure PHBV polymer under the same conditions produced electrospun fibers of around 880 nm. However, the deposition of PHBV/ChCl/urea/water fibers resulted in a surprising macroscopic rugose 3D surface morphology made of aligned nanofibers when processed at 50% relative humidity (RH). The nanofiber grammages above which this 3D morphology, associated with NADES-induced charge retention, formed was found to be dependent on the substrate used and RH. This morphology was not seen at 20% RH nor when pure PHBV was produced. Charge stability studies revealed that PHBV/ChCl/urea/water nanofibers exhibited lasting charge retention, especially when sandwiched between spunbond polypropylene textiles. Finally, such multilayer structures containing a very thin double layer of PHBV/ChCl/urea/water fibers after corona treatment exhibited improved paraffin aerosol penetration, which was ascribed to the combination of thinner fibers and their charge retention capacity. The here-developed electrospun PHBV fibers containing NADES demonstrated for the first time a new potential application as electret filter media.

show abstract

Section: Resultsmentioning

confidence: 99%