Poly(vinylidene fluoride) composites with carbon nanotubes decorated with metal nanoparticles

Nunes-Pereira, J.; Sharma, Pragati; Fernandes, Liliana C.; Oliveira, Juliana T.; Moreira, J. Agostinho; Sharma, Rakesh K.; Lanceros‐Méndez, S.

doi:10.1016/j.compositesb.2017.12.047

Cited by 30 publications

(14 citation statements)

References 41 publications

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“…As a result, only a part of the PEG chains can move freely. These results are in‐line with the previous work from Nudes‐Pereira et al . but in a different composite system.…”

Section: Resultssupporting

confidence: 93%

Thermal and dynamic mechanical properties of polyethylene glycol/quartz composites for phase change materials

Fauziyah

Hilmi

Zainuri

et al. 2019

J of Applied Polymer Sci

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Polyethylene glycol (PEG)/quartz (denoted as BP/Q) composites have been investigated as candidates of phase change materials (PCMs) due to their thermomechanical properties around the glass transition temperature as well as thermal properties between 30 and 600 C. Quartz (q-SiO 2 ) powders were extracted from local sand in Tanah Laut, Pelaihari, South Kalimantan, Indonesia. The composites were prepared by dispersing q-SiO 2 powders in the PEG matrix followed by the wet mixing process. The thermal properties of the composites were characterized using differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA), while the thermomechanical properties were examined using a dynamic mechanical analyzer (DMA) in a three-point bending mode around the PEG glass transition temperature range (−100-50 C). The morphology and interface bonding were investigated using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). From the DSC measurement, the endothermic peak of the composites showed a shift of approximately 7-12 C toward higher temperatures than that of the pure polymer. The melting enthalpy values (ΔH m ) of the BP/Q composites covered the required PCM application range, that is, between 139 and 182 J/g. The TGA of the composites showed that thermal degradation occurs in the range of 250-450 C. We found that solid-solid PCMs (ssPCMs) were successfully fabricated with the addition of 10 and 20 wt% q-SiO 2 . From DMA characterization, the BP/Q 20 wt% composite exhibited the maximum E' and the minimum energy dissipation (E"). Its E' value was approximately 250 MPa more than that of the pure PEG. The glass transition (T g ) temperatures of PEG and BP/Q composites (5, 10, and 20 wt%) were around −24.5, −19.1, −17.1, and − 5.3 C, respectively. In addition, the E" and tan δ values decreased with q-SiO 2 filler content. Furthermore, the Cole-Cole plots of the BP/Q composites revealed a better interfacial bonding between the q-SiO 2 and the PEG matrix in the composites with higher silica content. A compact morphology was shown by the BP/Q 20 wt% composite due to high silica concentration.

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“…As a result, only a part of the PEG chains can move freely. These results are in‐line with the previous work from Nudes‐Pereira et al . but in a different composite system.…”

Section: Resultssupporting

confidence: 93%

Thermal and dynamic mechanical properties of polyethylene glycol/quartz composites for phase change materials

Fauziyah

Hilmi

Zainuri

et al. 2019

J of Applied Polymer Sci

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“…Furthermore, no traces of γ-PVDF were detected. Thus, the addition of the ND fillers and the applied surface functionalizations did not interfere in the crystallization of PVDF and did not promote the nucleation of γ-PVDF, as observed in previous works with similar composites with ND 12 or with carbonaceous nanofillers 48 .…”

Section: Morphology and Topographysupporting

confidence: 69%

Antimicrobial and Antibiofilm Properties of Fluorinated Polymers with Embedded Functionalized Nanodiamonds

Nunes-Pereira

Fernandes

Carvalho

et al. 2020

ACS Appl. Polym. Mater.

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Environmentally resilient antimicrobial coatings are becoming increasingly required for a wide range of applications. For this purpose, nanocomposite thin films of poly(vinylidene fluoride) (PVDF) filled with several types of functionalized nanodiamonds (NDs) were processed by solvent casting. The effects of ND inclusion and functionalization in their morphological, structural, optical, thermal, and electrical properties were evaluated taking into account the type of the nanofiller and a concentration up to 2 wt %. The morphology, structure, and thermal features of the polymer matrix are governed by the processing conditions, and no noticeable changes occurred due to the presence of the ND fillers. The polymer crystallized mainly in the α phase with a crystallinity of ≈60%. In turn, the optical transmittance from 200 to 800 nm and the dielectric constant effectively depended on the ND type and content. The inclusion of the ND particles effectively provided antimicrobial properties to the films, which depended on the ND functionalization. This study thus shows that the incorporation of functionalized NDs into PVDF allows the development of antimicrobial coatings with tailorable optical and dielectric properties, which could be of great importance to face nowadays pandemic crisis scenario.

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“…All of these features make CNTs one of the most‐preferred in the modification of the electrodes. In addition, the catalytic properties of CNT can be improved by combining it with polymeric structures in order to form CNT‐conducting polymer nanocomposites . The coexistence of CNT and conducting polymers provides the fabrication of new multifunctional and active surfaces towards different analytes .…”

Section: Introductioncontrasting

confidence: 44%

Poly(Taurine‐Glutathione)/Carbon Nanotube Modified Glassy Carbon Electrode as a New Levofloxacin Sensor

Koçak

2019

Electroanalysis

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A new highly sensitive and selective electrochemical levofloxacin sensor based on co‐polymer‐carbon nanotube composite electrode was developed. Taurine and Glutathione were electrochemically co‐polymerized on multiwalled carbon nanotubes modified glassy carbon electrode (Poly(TAU‐GSH)/CNT/GCE) and used as a levofloxacin sensor in pH 6 phosphate buffer solution. The new composite electrode surfaces were characterized by scanning electron microscopy, atomic force microscopy and electrochemical impedance spectroscopy. Under the optimized conditions, two linear segments were obtained for increasing LEV concentrations between 20 nmol L−1‐1 μmol L−1 and 1.5 μmol L−1‐55 μmol L−1 LEV with a detection limit of 9 nmol L−1 using amperometry. Poly(TAU‐GSH)/CNT/GCE exhibited high sensitivity, selectivity with good stability. The new sensor was employed for real samples of LEV tablets and urine. Promising results were obtained with good accuracy which were also in accordance with LC‐MS/MS analysis.

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Poly(vinylidene fluoride) composites with carbon nanotubes decorated with metal nanoparticles

Cited by 30 publications

References 41 publications

Thermal and dynamic mechanical properties of polyethylene glycol/quartz composites for phase change materials

Thermal and dynamic mechanical properties of polyethylene glycol/quartz composites for phase change materials

Antimicrobial and Antibiofilm Properties of Fluorinated Polymers with Embedded Functionalized Nanodiamonds

Poly(Taurine‐Glutathione)/Carbon Nanotube Modified Glassy Carbon Electrode as a New Levofloxacin Sensor

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