Amorphous SiO2 NP-Incorporated Poly(vinylidene fluoride) Electrospun Nanofiber Membrane for High Flux Forward Osmosis Desalination

2016 ◽  
Vol 8 (7) ◽  
pp. 4561-4574 ◽  
Author(s):  
M. Obaid ◽  
Zafar Khan Ghouri ◽  
Olfat A. Fadali ◽  
Khalil Abdelrazek Khalil ◽  
Abdulhakim A. Almajid ◽  
...  
Chemosphere ◽  
2018 ◽  
Vol 207 ◽  
pp. 347-356 ◽  
Author(s):  
Jeong-Ann Park ◽  
Aram Nam ◽  
Jae-Hyun Kim ◽  
Seong-Taek Yun ◽  
Jae-Woo Choi ◽  
...  

2015 ◽  
Vol 279 ◽  
pp. 631-638 ◽  
Author(s):  
M. Obaid ◽  
Gehan M.K. Tolba ◽  
Moaaed Motlak ◽  
Olfat A. Fadali ◽  
Khalil Abdelrazek Khalil ◽  
...  

Sensors ◽  
2020 ◽  
Vol 20 (11) ◽  
pp. 3111 ◽  
Author(s):  
Nader Shehata ◽  
Ahmed H. Hassanin ◽  
Eman Elnabawy ◽  
Remya Nair ◽  
Sameer A. Bhat ◽  
...  

This paper introduces a new usage of piezoelectric poly (vinylidene fluoride) (PVDF) electrospun nanofiber (NF) membrane as a sensing unit for acoustic signals. In this work, an NF mat has been used as a transducer to convert acoustic signals into electric voltage outcomes. The detected voltage has been analyzed as a function of both frequency and amplitude of the excitation acoustic signal. Additionally, the detected AC signal can be retraced as a function of both frequency and amplitude with some wave distortion at relatively higher amplitudes and within a certain acoustic spectrum region. Meanwhile, the NFs have been characterized through piezoelectric responses, beta sheet calculations and surface morphology. This work is promising as a low-cost and innovative solution to harvest acoustic signals coming from wide resources of sound and noise.


2017 ◽  
Vol 5 (21) ◽  
pp. 10470-10479 ◽  
Author(s):  
Kejia Ji ◽  
Hongjie Xu ◽  
Xiaodong Ma ◽  
Jie Yin ◽  
Xuesong Jiang

hPEA@PVDF membranes can separate dyes in aqueous solution through molecular filtration with a high flux rate and large adsorption capacity.


Langmuir ◽  
2007 ◽  
Vol 23 (26) ◽  
pp. 13085-13092 ◽  
Author(s):  
Satinderpal Kaur ◽  
Zuwei Ma ◽  
Renuga Gopal ◽  
Gurdev Singh ◽  
Seeram Ramakrishna ◽  
...  

Nanomaterials ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 172
Author(s):  
Riccardo D’Anniballe ◽  
Andrea Zucchelli ◽  
Raffaella Carloni

In the pursuit of designing a linear soft actuator with a high force-to-weight ratio and a stiffening behavior, this paper analyzes the electrostrictive effect of the poly(vinylidene fluoride-trifluoroethylene-chlorotrifluoroethylene) polymer in the form of film and aligned electrospun nanofiber mat. An experimental setup is realized to evaluate the electrostrictive effect of the specimens disjointly from the Maxwell stress. In particular, an uniaxial load test is designed to evaluate the specimens’ forces produced by their axial contraction (i.e., the electrostrictive effect) when an external electric field is applied, while an uniaxial tensile load test is designed to show the specimens’ stiffening properties. This electro-mechanical analysis demonstrates that both the film and the nanofiber mat are electrostrictive, and that the nanofiber mat exhibits a force-to-weight ratio ∼65% higher than the film and, therefore, a larger electrostrictive effect. Moreover, both the film and the nanofiber mat show a stiffening behavior, which is more evident for the nanofiber mat than the film and is proportional to the weight of the material. This study concludes that, thanks to its electro-mechanical properties, the poly(vinylidene fluoride-trifluoroethylene-chlorotrifluoroethylene), especially in the form of aligned electrospun nanofiber mat, has high potential to be used as electro-active polymer for soft actuators in biomedical and biorobotics applications.


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