Effect of stimuli-responsive polydiacetylene on the crystallization and mechanical properties of PVDF nanofibers

Moazeni, Najmeh; Sadrjahani, Mehdi; Latifi, Masoud; Rouhani, Shohre

doi:10.1007/s00289-019-03020-6

Cited by 8 publications

(6 citation statements)

References 40 publications

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“…Additionally, the spectrum of the fiber mats shows a low-intensity peak at 763 cm –1 . This peak is typically attributed to the presence of a residual α phase, the nonelectroactive phase of PVDF, as often mentioned in the literature. − …”

Section: Resultsmentioning

confidence: 99%

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Flexible Magnetocaloric Fiber Mats for Room-Temperature Energy Applications

Bayzi Isfahani,

Coondoo,

Bdikin

et al. 2024

ACS Appl. Mater. Interfaces

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Currently, magnetocaloric refrigeration technologies are emerging as ecofriendly and more energy-efficient alternatives to conventional expansion−compression systems. However, major challenges remain. A particular concern is the mechanical properties of magnetocaloric materials, namely, their fatigue under cycling and difficulty in processing and shaping. Nevertheless, in the past few years, using multistimuli thermodynamic cycles with multicaloric refrigerants has led to higher heat-pumping efficiencies. To address simultaneously the challenges and develop a multicaloric material, in this work, we have prepared magnetocaloric-based flexible composite mats composed of micrometric electroactive (EA) polyvinylidene fluoride (PVDF) fibers with embedded magnetocaloric/strictive La(Fe,Si) 13 particles by the simple and cost-effective electrospinning technique. The composite's structural characterization, using X-ray diffraction (XRD) analysis, Fourier transform infrared (FTIR) spectroscopy, and measurements of the local-scale piezoresponse, revealed a cubic NaZn 13 -type structure of the La(Fe,Si) 13 phase and the formation of the dominant polar β-phase of the PVDF polymer. The PVDF-La(Fe,Si) 13 composite showed an enhancement of the longitudinal piezoelectric coefficient (effective d 33 ) (−11.01 pm/V) compared with the single PVDF fiber matrix (−9.36 pm/V). The main magnetic properties of La(Fe,Si) 13 powder were retained in the PVDF-La(Fe,Si) 13 composite, including its giant magnetocaloric effect. By retaining the unique magnetic properties of La(Fe,Si) 13 embedded in the electroactive piezoelectric polymer fiber mats, we have designed a flexible, easily shapeable, and multifunctional composite enabling its potential application in multicaloric heat-pumping devices and other sensing and actuating devices.

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Section: Resultsmentioning

confidence: 99%

“…This peak is typically attributed to the presence of a residual α phase, the nonelectroactive phase of PVDF, as often mentioned in the literature. 63 − 65 …”

Section: Resultsmentioning

confidence: 99%

Flexible Magnetocaloric Fiber Mats for Room-Temperature Energy Applications

Bayzi Isfahani,

Coondoo,

Bdikin

et al. 2024

ACS Appl. Mater. Interfaces

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“…Enhancement of the mechanical properties can be attributed to the additional hydrogen bond strength of the filler PCDA-HBA with the matrix polymer. Moazeni and fellow researchers reported a decrease in textile strength and increased elongation and modulus due to the addition of PCDA into hydrophobic polyvinylidene fluoride (PVDF) matrix [ 28 ]. However, with the addition of PCDA into the hydrophilic polyethylene oxide (PEO) matrix, an increase in tensile strength was reported by the Li group [ 38 ].…”

Section: Resultsmentioning

confidence: 99%

“…Jeon et al exhibited superior sensitivity of PDA electrospun nanofiber structures over thin films prepared from the same solution [ 18 ]. However, due to the relatively low viscosity of PDAs in solution, electrospinning without any high viscosity supporting polymer (matrix polymer) is highly challenging [ 13 , 27 , 28 ]. For this study, regenerated cellulose (RC) was selected as the matrix polymer due to the presence of a large number of exposed hydroxyl (OH − ) groups on the composite structure, which favors the reaction with OP to enhance the sensitivity of the composites.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Fabrication, and Characterization of Functionalized Polydiacetylene Containing Cellulose Nanofibrous Composites for Colorimetric Sensing of Organophosphate Compounds

et al. 2021

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Organophosphate (OP) compounds, a family of highly hazardous chemical compounds included in nerve agents and pesticides, have been linked to more than 250,000 annual deaths connected to various chronic diseases. However, a solid-state sensing system that is able to be integrated into a clothing system is rare in the literature. This study aims to develop a nanofiber-based solid-state polymeric material as a soft sensor to detect OP compounds present in the environment. Esters of polydiacetylene were synthesized and incorporated into a cellulose acetate nanocomposite fibrous assembly developed with an electrospinning technique, which was then hydrolyzed to generate more hydroxyl groups for OP binding. Scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FT-IR), Instron® tensile tester, contact angle analyzer, and UV–Vis spectroscopy were employed for characterizations. Upon hydrolysis, polydiacetylene esters in the cellulosic fiber matrix were found unaffected by hydrolysis treatment, which made the composites suitable for OP sensing. Furthermore, the nanofibrous (NF) composites exhibited tensile properties suitable to be used as a textile material. Finally, the NF composites exhibited colorimetric sensing of OP, which is visible to the naked eye. This research is a landmark study toward the development of OP sensing in a protective clothing system.

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“…The fact that the peak intensity increased in Figure 5b could be attributed to the non-uniform distribution of ZnO nanoparticles in the membrane matrix [46]. The XRD patterns of PVDF/ZnO/PDA and PVDF/PDA membranes were similar to that of pristine PVDF membrane with no significant changes in the crystal structure [47,48]. Functional groups of all membranes determined by FTIR analysis are given in Figure 6.…”

Section: Effects Of Environmental Conditions On Adsorption Studymentioning

confidence: 92%

Modification of PVDF Membranes Using Dopamine/Zinc Oxide for Lead Removal from Aqueous Media

ÜÇEL

DEMİREL

2022

Open Journal of Nano

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Ultrafiltration (UF) has long been a leading separation technology with a strong historical track record for a wide range of applications such as the treatment of ground water, surface water and wastewater. The utilization of nanofillers in the fabrication of organic UF membranes has brought about breakthrough progress in membrane science and technology. The present study demonstrates modification of polyvinylidene fluoride (PVDF) membranes using zinc oxide (ZnO), polydopamine (PDA), and ZnO/PDA powders by blending and coating methods, respectively. ZnO/PDA nanoparticles were synthesized by the sol-gel method and were characterized using X-Ray Diffraction in comparison to ZnO and dopamine (DA) powders. Filtration performance of the fabricated membranes were determined in terms of water flux, sodium alginate (SA) rejection, and anti-fouling properties. Moreover, lead (Pb +2 ) ions were chelated with chitosan following rejection of the formed lead-chitosan complexes from the fabricated membranes. Although water flux and SA rejections of the pristine PVDF membrane in the presence of different powders could not be substantially improved, antifouling properties could be enhanced markedly. PVDF/ZnO/PDA membrane was found to exhibit the best separation performance with 92% flux recovery ratio and 97% SA rejection and had the highest lead-chitosan removal of 88.5% from aqueous solutions. The enhanced separation performance of the PVDF/ZnO/PDA membrane was revealed by SEM images, which demonstrated remarkable morphological changes such as more porous, longer and interconnected fingerlike formations compared with the pristine PVDF membrane.

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Effect of stimuli-responsive polydiacetylene on the crystallization and mechanical properties of PVDF nanofibers

Cited by 8 publications

References 40 publications

Flexible Magnetocaloric Fiber Mats for Room-Temperature Energy Applications

Flexible Magnetocaloric Fiber Mats for Room-Temperature Energy Applications

Synthesis, Fabrication, and Characterization of Functionalized Polydiacetylene Containing Cellulose Nanofibrous Composites for Colorimetric Sensing of Organophosphate Compounds

Modification of PVDF Membranes Using Dopamine/Zinc Oxide for Lead Removal from Aqueous Media

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