Thermally exfoliated π–π stacked blistered graphene oxide as efficient flame retardant soft nano-bundles for vinyl ester resin composites

Cheedarala, Ravi Kumar; Song, Jung Il

doi:10.1039/d0ma00813c

Cited by 5 publications

(4 citation statements)

References 56 publications

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“…4. 38 Fig. 5a shows the FT-IR spectroscopy of mHA micro-needle powder, pure jute, and mHA depositions over pure jute by a dip coating method.…”

Section: Resultsmentioning

confidence: 99%

“…and 31.5%, respectively, compared with those of neat 901-VER. 36 Recently, our team has developed various nanomaterials, such as MgO NPs 37 and blistered GO 38 deposited on jute fiber as effective flame-retardant materials. Also, we have developed novel 3D-networked melamine–naphthalene–polyamic acid nanofillers doped in vinyl ester resin for higher flame retardancy.…”

Section: Introductionmentioning

confidence: 99%

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Renewable micro hydroxyapatite (mHA) extracted from animal bones, and fabricated mHA-Jute-vinyl ester bio-composite as an intumescent green flame retardant material

Chidarala

Song

2023

Mater. Adv.

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“…4. 38 Fig. 5a shows the FT-IR spectroscopy of mHA micro-needle powder, pure jute, and mHA depositions over pure jute by a dip coating method.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Renewable micro hydroxyapatite (mHA) extracted from animal bones, and fabricated mHA-Jute-vinyl ester bio-composite as an intumescent green flame retardant material

Chidarala

Song

2023

Mater. Adv.

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“…throughout the whole period of the stability and durability test. This is due to the exceptional energy harvesting properties and superior mechanical strength of the ChS-PVA TENG surface (Cheedarala and Song, 2019c;Cheedarala and Song, 2019d;Cheedarala, 2021;Cheedarala and Song, 2021).…”

Section: Results Of Chitosan-polyvinyl Alcohol Triboelectric Nanogenerators Against To Pvdf Membranementioning

confidence: 99%

Moderately Transparent Chitosan-PVA Blended Membrane for Strong Mechanical Stiffness and as a Robust Bio-Material Energy Harvester Through Contact-Separation Mode TENG

Cheedarala

Song

2021

Front. Nanotechnol.

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The detection of sustainable materials from naturally available resources using a simple fabrication process is highly important for novel research. Here, we used chitosan-PVA (Chs-PVA) blend films via layer-by-layer casting technologies for generating power through mechanical induction through triboelectric nanogenerators. The proposed Chs-PVA biodegradable film (i.e., thickness of 60 ± 5 μm) is facile, ecofriendly, highly flexible, mechanically strong, cost-effective, and easy to scale up. FT-IR analysis of the ChS-PVA blend membrane showed the strong interactions between the amines of ChS and hydroxyl groups of PVA through chemical cross-linking by hydrogen bonding. More importantly, the triboelectric nanogenerators (TENG) values of ChS-PVA films were 3–4 orders of magnitude lower than chitosan films reported before. Layer-on-layer cast films in particular exhibited high tensile strength (15.8 ± 1 MPa) and were more than three times stronger than other polyelectrolyte multilayer films. Both types of films remained stable in an acidic environment. Furthermore, the layer-on-layer-assembled films presented greater open circuit voltage (Voc) and short circuit current (Isc) values compared to pure ChS and PVA films. The ChS-PVA membrane can be used as a functional layer to produce charges by collecting get-up-and-go through vertical contact and separation mode TENG counters to the PVDF membrane. The enhancement of Voc and Isc of ChS-PVA TENG were 244 and 1,080% from ChS TENG. Where in the case of PVA TENG, the enhancement of Voc and Isc were increased by 633 and 2,888%, respectively due to the availability of free loan pair on the -NH2 and -OH functional groups. The novel ChS-PVA TENG is a potential candidate for satisfying the tight requirement of an optimized energy harvesting device as an alternate bio-material option for contact-separation mode TENGs.

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“…In order to further explore the advantages of rGOentangled Fe-Ni nanoparticles, experiments on their reuse applications were carried out, and the results were discussed in detail. Graphene oxide was prepared with a modified Hummers system by the thermal exfoliation of natural graphite flakes [48]. Graphene oxide obtained from the above-said procedure was subjected to ultrasonication for 2 h, and NaBH 4 (1M) (1:10) was added slowly with continuous stirring.…”

Section: Introductionmentioning

confidence: 99%

Study on free and entangled binary metal nanocatalysts for removal of 2,4,6-trichlorophenol in aqueous phase: a comparative study

Felshia

Gnanamani

2023

Nanotechnology

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The present study highlights the comparative catalytic removal of 2,4,6-trichlorophenol (TCP) in aqueous phase by binary metal nanocatalysts in free as well as entangled forms. In brief, binary nanocatalysts comprising of Fe-Ni are prepared, characterized, and subsequently entangled in reduced graphene oxide (rGO) for better performances and reuse applications. Optimization studies on the mass of free and rGO-entangled binary nanocatalysts with respect to TCP concentration and other environmental factors are studied in detail. Results suggest binary nanocatalysts in free form at 40 mg/ml took 300 min to dechlorinate 600 ppm of TCP, whereas rGO-entangled Fe-Ni catalyst took only 190 min. Experiments on the reuse of the catalyst with respect to removal efficiency implied compared to free form rGO-entangled nanocatalysts exemplify more than 98% of removal efficacy even after 5 times of exposure to 600 ppm TCP concentration. High-performance liquid chromatography analysis display a pattern of sequential dechlorination during catalytic process. Followed by dechlorination, the phenol-enriched aqueous phase exposed to Bacillus licheniformis SL10, which degrades the phenol effectively within 24 hours. In conclusion, the prepared binary metal nanocatalysts, both in free as well as in rGO-entangled forms, effectively dechlorinate 2,4,6-TCP contaminations in aqueous phase, but with significant differences in time taken for the removal. And entanglement facilitate the reuse of the catalyst more effectively. The accumulated phenol biocatalytically removed and suggests the reuse applications of treated water.

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Thermally exfoliated π–π stacked blistered graphene oxide as efficient flame retardant soft nano-bundles for vinyl ester resin composites

Abstract: In this article, we synthesized thermally exfoliated blistered graphene oxide (BGO) soft nano bundles from graphene oxide (GO) by a thermal heating method.

Cited by 5 publications

References 56 publications

Renewable micro hydroxyapatite (mHA) extracted from animal bones, and fabricated mHA-Jute-vinyl ester bio-composite as an intumescent green flame retardant material

Renewable micro hydroxyapatite (mHA) extracted from animal bones, and fabricated mHA-Jute-vinyl ester bio-composite as an intumescent green flame retardant material

Moderately Transparent Chitosan-PVA Blended Membrane for Strong Mechanical Stiffness and as a Robust Bio-Material Energy Harvester Through Contact-Separation Mode TENG

Study on free and entangled binary metal nanocatalysts for removal of 2,4,6-trichlorophenol in aqueous phase: a comparative study

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