Modification of hedgehog-like structured carbon nanohorns to promote flame retardant synergistic effect in assembled coatings for protective cotton fabrics

Xu, Jie; Xue, Manman; Niu, Yanjie; Xie, Zhipeng; Feng, Liang; Zhang, Yixin; Wu, Jianjun

doi:10.1016/j.polymdegradstab.2023.110408

Cited by 14 publications

(5 citation statements)

References 54 publications

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“…In the full spectrum of the P7PA1.5S0.2 aerogel, a new peak at 135 eV emerged due to the incorporation of phytic acid, attributed to P 2p. Figure d presents the P 2p spectrum of the P7PA1.5S0.2 aerogel, confirming the presence of PO and P–O–C bonds, aligning with the proposed reaction mechanism in Figure . In summary, the XPS results are consistent with the aforementioned FTIR and XRD findings.…”

Section: Resultssupporting

confidence: 81%

“…Single-walled carbon nanohorns (SWCNHs, length of 40−50 nm, diameter of 25−100 nm) were provided by the DC arc discharge method, the detailed information was reported in our earlier work. 31,33 All ingredients were employed without additional purification.…”

Section: Methodsmentioning

confidence: 99%

“…Poly(vinyl alcohol) (PVA, Mowiol10-98, M w = 61,000) with a viscosity of 9–11 mPa s, phytic acid (50 wt %), absolute ethanol, and trimethoxymethylsilane (MTMS, 98%) were purchased from Sigma-Aldrich. Single-walled carbon nanohorns (SWCNHs, length of 40–50 nm, diameter of 25–100 nm) were provided by the DC arc discharge method, the detailed information was reported in our earlier work. , All ingredients were employed without additional purification.…”

Section: Methodsmentioning

confidence: 99%

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Poly(vinyl alcohol) Composite Aerogel toward Lightweight, Remarkable Flame Retardancy, and Thermal Insulation Properties by Incorporating Carbon Nanohorns and Phytic Acid

Xu,

Ao,

de la Vega

et al. 2024

ACS Appl. Polym. Mater.

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In this work, an aerogel with excellent flame retardancy, enhanced compression modulus, and efficient thermal insulation was developed from poly(vinyl alcohol) (PVA), biobased phytic acid (PA), and single-walled carbon nanohorns (SWCNHs). The microstructural evolution of the freeze-dried PVA/PA/SWCNH composite aerogels revealed that varied amounts of phytic acid could influence the three-dimensional architecture. Especially, when the concentration of PA was 1.5%, the PVA/PA/SWCNHs composite aerogel with a tightly arranged "short tubes" structure had a high compressive modulus of 2.02 MPa, corresponding to the specific modulus of 20.2 MPa cm 3 /g. Compared to the PVA/SWCNHs aerogel, the PVA/PA/SWCNHs composite aerogels showed better fire retardancy, as confirmed by limited oxygen index (LOI) tests and cone calorimetry (CC) tests. Notably, the introduction of phytic acid at 1.5% resulted in LOI values up to 49.8 ± 0.1% and the pHRR and THR of the PVA/PA/SWCNHs composite aerogel were dramatically reduced by 74.3 and 81.0%, respectively. In addition, PVA/PA/SWCNHs composite aerogels with different concentrations of phytic acid exhibited excellent thermal insulation performance with a slightly lower thermal conductivity (32.2− 46.9 mW/(m K)) and resisted the ∼1300 °C flame. Meanwhile, the synergistic flame retardancy between SWCNHs and phytic acid was also confirmed by the analysis of the char residues and gas-phase products. These unique characteristics make the aerogel a promising multifunctional candidate for applications in aviation, aerospace, and other fields.

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Section: Resultssupporting

confidence: 81%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Poly(vinyl alcohol) Composite Aerogel toward Lightweight, Remarkable Flame Retardancy, and Thermal Insulation Properties by Incorporating Carbon Nanohorns and Phytic Acid

Xu,

Ao,

de la Vega

et al. 2024

ACS Appl. Polym. Mater.

Self Cite

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“…Besides, the peak of the O 1s spectra at 533.0 eV from Figure 12d may originate from the cross-linked structure (C−O−P). 51 Moreover, the C−O−P structure is also detected at 134.5 eV in P 2p spectra, 60 as shown in Figure 12e. These results are in accordance with the C 1s spectra.…”

Section: ■ Results and Discussionmentioning

confidence: 91%

One-Step Spraying Strategy for Fabricating Bioinspired, Graphene-Based, and Multifunctional-Integrated Coatings on Structural Steel with Good Water Repellency, Fireproofing, Anticorrosion, and Durability

Tang,

Gao,

et al. 2024

Langmuir

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Traditionally, many coatings were merely concentrated on settling the inherent fire protection problem of steel structures, while surface contamination and corrosion susceptibility should also be considered. Concurrently addressing these problems in fireproof efficiency and surface multifunctionality has become an issue of great significance in further expanding the application value in industrial and daily scenarios. Based on this condition, ecofriendly, graphene-based, and superhydrophobic coatings with multifunctional integration were constructed on steel via a one-step spraying method. The as-prepared coatings mainly consist of epoxy resin (EP), silicone resin (SR), a cyclodextrin-based flame retardant (MCDPM), expandable graphite (EG), and multilayered graphene (MG). The results demonstrate that the water contact angle (WCA) and water sliding angle (WSA) of asprepared coatings can reach 156.8 ± 1.6 and 5.8 ± 0.7°, respectively, revealing good water repellency and self-cleaning properties. The coatings can also exhibit adequate adaptability for various substrates including wood, polyurethane foam, and cotton fabrics. Besides, good durability and robustness of coatings have been also verified via acid/alkali immersion, outdoor exposure, O 2 /plasma etching, and linear abrasion tests. Simultaneously, the coatings can exhibit excellent anticorrosion capacity for steel materials via a double barrier effect. Most importantly, the coatings have exhibited the lowest backside temperature (234.5 °C) during fire impact tests, suggesting excellent fireproof and heat insulation performance. This fact can be ascribed to the conjunct action between the physical/chemical charring process of flame retardants and the remarkable thermal stability of graphene. Consequently, this article can be expected to further promote the development and application of multifunctional-integrated coatings for steel structures in more fields.

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“…The use of carbon nano-objects for the design of efficient LbL flame-retardant architectures for cotton was thoroughly investigated by Xu and co-workers [88], who designed tri-layered spray-assisted architectures made of 3-aminopropyl triethoxysilane, modified single-walled carbon nanohorns, and ammonium polyphosphate on cotton fabrics. In particular, four tri-layered assemblies allowed for achieving self-extinction in vertical flame spread tests (fabric's damage length: 3.9 cm) and for considerably decreasing both the total heat release (by about 57%) and peak of the heat release rate (by around 93%), compared to the control fabric.…”

Section: Nanostructured Lbl Assemblies For Flame-retarded Cotton: Lat...mentioning

confidence: 99%

Nanostructured Flame-Retardant Layer-by-Layer Architectures for Cotton Fabrics: The Current State of the Art and Perspectives

Malucelli

2024

Nanomaterials

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Nowadays, nanotechnology represents a well-established approach, suitable for designing, producing, and applying materials to a broad range of advanced sectors. In this context, the use of well-suited “nano” approaches accounted for a big step forward in conferring optimized flame-retardant features to such a cellulosic textile material as cotton, considering its high ease of flammability, yearly production, and extended use. Being a surface-localized phenomenon, the flammability of cotton can be quite simply and effectively controlled by tailoring its surface through the deposition of nano-objects, capable of slowing down the heat and mass transfer from and to the textile surroundings, which accounts for flame fueling and possibly interacting with the propagating radicals in the gas phase. In this context, the layer-by-layer (LbL) approach has definitively demonstrated its reliability and effectiveness in providing cotton with enhanced flame-retardant features, through the formation of fully inorganic or hybrid organic/inorganic nanostructured assemblies on the fabric surface. Therefore, the present work aims to summarize the current state of the art related to the use of nanostructured LbL architectures for cotton flame retardancy, offering an overview of the latest research outcomes that often highlight the multifunctional character of the deposited assemblies and discussing the current limitations and some perspectives.

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Modification of hedgehog-like structured carbon nanohorns to promote flame retardant synergistic effect in assembled coatings for protective cotton fabrics

Cited by 14 publications

References 54 publications

Poly(vinyl alcohol) Composite Aerogel toward Lightweight, Remarkable Flame Retardancy, and Thermal Insulation Properties by Incorporating Carbon Nanohorns and Phytic Acid

Poly(vinyl alcohol) Composite Aerogel toward Lightweight, Remarkable Flame Retardancy, and Thermal Insulation Properties by Incorporating Carbon Nanohorns and Phytic Acid

One-Step Spraying Strategy for Fabricating Bioinspired, Graphene-Based, and Multifunctional-Integrated Coatings on Structural Steel with Good Water Repellency, Fireproofing, Anticorrosion, and Durability

Nanostructured Flame-Retardant Layer-by-Layer Architectures for Cotton Fabrics: The Current State of the Art and Perspectives

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