Formation of uniform PVDF fibers under ultrasound exposure in presence of anionic surfactant

Tarasova, Elvira; Tamberg, K.-G.; Viirsalu, Mihkel; Savest, Natalja; Vassiljeva, Viktoria; Krasnou, Illia; Märtson, Triin; Krumme, Andres

doi:10.1016/j.elstat.2015.05.004

Cited by 4 publications

(7 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Section: Resultsmentioning

confidence: 99%

“…Thus, in order to comprehend the process, it is essential to determine the main parts of the solution's characteristics, namely its viscosity and conductivity. Based on our previous experiments and our knowledge of the literature [7,8,11], the fixed vol. ratio of solvents DMSO-Ac = 7/3 and the PVDF concentration in the binary mixture of 20 wt% was used for all the experiments.…”

Section: Pvdf Electrospinning Optimizationmentioning

confidence: 99%

“…Moreover, the increase in conductivity caused by the ionic nature of the CTAB could bring about the intense initiation of a stable surface charge, resulting in easier drawing and stretching of the fibers. All these conditions should favor the formation of finer fibers [8,21]. In order to quantitatively compare the physical effects of CTAB on the flow properties of the PVDF solution, a rheological characterization was performed.…”

Section: Pvdf Electrospinning Optimizationmentioning

confidence: 99%

“…The jetting fluid is collected on a collector in the form of fibers due to the potential difference between the needle tip and the collector. Besides the polymer solution's intrinsic properties (such as polymer concentration, viscosity, solution type, surface tension, molecular weight and conformation of the polymer chain and electrical conductivity) [7,8], the electrospinning processing conditions (applied voltage, distance between needle and collector, collector's rotational speed, solution feed rate, size of needle, material and shape of collector, etc.) [9][10][11] have a significant effect both on the β phase's proportion and the crystallinity of the electrospun PVDF.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Structure–Properties Relationship of Electrospun PVDF Fibers

et al. 2020

View full text Add to dashboard Cite

Electrospinning as a versatile technique producing nanofibers was employed to study the influence of the processing parameters and chemical and physical parameters of solutions on poly(vinylidene fluoride) (PVDF) fibers’ morphology, crystallinity, phase composition and dielectric and piezoelectric characteristics. PVDF fibrous layers with nano- and micro-sized fiber diameters were prepared by a controlled and reliable electrospinning process. The fibers with diameters from 276 nm to 1392 nm were spun at a voltage of 25 kV–50 kV from the pure PVDF solutions or in the presence of a surfactant—Hexadecyltrimethylammonium bromide (CTAB). Although the presence of the CTAB decreased the fibers’ diameter and increased the electroactive phase content, the piezoelectric performance of the PVDF material was evidently deteriorated. The maximum piezoelectric activity was achieved in the fibrous PVDF material without the use of the surfactant, when a piezoelectric charge of 33 pC N−1 was measured in the transversal direction on a mean fiber diameter of 649 nm. In this direction, the material showed a higher piezoelectric activity than in the longitudinal direction.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Pvdf Electrospinning Optimizationmentioning

confidence: 99%

Section: Pvdf Electrospinning Optimizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Structure–Properties Relationship of Electrospun PVDF Fibers

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The effects of different types and contents of surfactants on the electrospinning of various polymer solutions have also been explored by several researchers. 32,[34][35][36][37][38][39] This paper presented a simple and effective method to modulate the morphology and diameter of alkali lignin-based nanofibers by utilizing surfactants to tune the rheology and other properties of the spinning solutions. Various types (ionic, cationic, and non-ionic) and contents of surfactants were added into lignin-PVA solutions and the morphology and size of the as-spun fibers were assessed.…”

Section: Introductionmentioning

confidence: 99%

Effects of Various Surfactants on Alkali Lignin Electrospinning Ability and Spun Fibers

Fang

Yang

Yuan

et al. 2017

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Anionic, cationic, and non-ionic surfactants with varying concentrations (0.2-1.2 %)were introduced to neutralize beads on lignin nanofibers by decreasing the surface tension of spinning dopes. The surfactants used in this work were sodium dodecyl sulfate (SDS), N,N,Ntrimethyl-1-dodecanaminium bromide (DTAB), and Triton™ X-100 (TX-100). The effects of viscosity, rheological properties, surface tension, and conductivity of the solutions on the morphology and physicochemical performances of fibers were investigated. As expected, the presence of certain amounts of surfactants eliminated the beads and resulted in the formation of smooth and bead-free fibers with small diameters. Furthermore, the gravimetric capacitance of carbon mat with 1 % SDS was slightly improved from 66.3 to 80.7 F g-1. The results suggested that the surfactants benefit the electrospinning of lignin and allow for the control over nanofiber morphology without compromising their performance as supercapacitor electrodes.

show abstract