Size-dependent flame retardancy of black phosphorus nanosheets

Duan, Zunbin; Wang, Yanfang; Bian, Shi; Liu, Danni; Zhang, Xue; He, Rui; Wang, Jiahong; Qu, Guangbo; Chu, Paul K.; Yu, Xue‐Feng

doi:10.1039/d1nr08350c

Cited by 27 publications

(9 citation statements)

References 45 publications

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“…Dry and wet ball milling methods are commonly used mechanical techniques to grind bulk black-P powders into few-layered phosphorene. 212 Zhu et al have developed a solid-state ball milling method to prepare ultrathin black-P nanosheets (Fig. 15a).…”

Section: Synthetic Strategies Of Elemental Phosphorus Materialsmentioning

confidence: 99%

Renaissance of elemental phosphorus materials: properties, synthesis, and applications in sustainable energy and environment

et al. 2023

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Section: Synthetic Strategies Of Elemental Phosphorus Materialsmentioning

confidence: 99%

Renaissance of elemental phosphorus materials: properties, synthesis, and applications in sustainable energy and environment

et al. 2023

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“…45,46 In recent years, PR has received great interest in the application for flame-retarded polymeric materials owing to its good compatibility with polymer matrix and facile preparation through mechanical cleavage, liquid ball milling, high-speed shearing, electrochemical exfoliation, and ultrasonic liquid exfoliation. 47 PR has been successfully used for the flame retardancy of epoxy resins, polyurethane, and biodegradable polymers. 48 These studies indicated that the PR nanosheets distributed in flammable polymers can suppress the spread of fire, reduce the release of heat, and decrease the emission of smoke during combustion.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Phosphorene (PR) is an emerging 2D nanomaterial with a unique few-layered lamellar nanostructure . It not only has a wide light absorption capability from ultraviolet through visible to near-infrared light thanks to its direct-bandgap semiconductive feature, but also exhibits a highly effective flame-retardant effect on most of organic polymers. , In recent years, PR has received great interest in the application for flame-retarded polymeric materials owing to its good compatibility with polymer matrix and facile preparation through mechanical cleavage, liquid ball milling, high-speed shearing, electrochemical exfoliation, and ultrasonic liquid exfoliation . PR has been successfully used for the flame retardancy of epoxy resins, polyurethane, and biodegradable polymers .…”

Section: Introductionmentioning

confidence: 99%

Eco-Friendly Flame-Retardant Phase-Change Composite Films Based on Polyphosphazene/Phosphorene Hybrid Foam and Paraffin Wax for Light/Heat-Dual-Actuated Shape Memory

Zhou,

Liu,

Zhang

et al. 2024

ACS Appl. Mater. Interfaces

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Multiactuated shape memory materials are a class of promising intelligent materials that have received great interest in the fields of self-healing, anticounterfeiting, biomedical, soft robotic, and smart thermal management applications. To obtain a light/heat-dual-actuated shape memory material for thermal management applications in fire safety, we have designed a type of halogen-free flame-retardant phase-change composite film based on polyaryloxyphosphazene (PDAP)/phosphorene (PR) hybrid foam as a support material and paraffin wax (PW) as a phase-change material (PCM). PDAP was synthesized as a flexible foam matrix through the ring-opening polymerization of hexachlorocyclotriphosphazene, followed by a substitution reaction of aryloxy groups. The porosity of the PDAP foam is improved by introducing PR nanosheets, facilitating a high latent heat capacity of the PDAP−PR/PW composite films for thermal management applications. The PDAP−PR/PW composite films can implement rapid shape recovery within 65 s in the heating process, which is much shorter than that of the corresponding film without PR nanosheets (185 s). Furthermore, the PDAP−PR/PW composite films also exhibit light-actuated shape memory behavior thanks to their good solar-tothermal energy absorption and conversion contributed by PR nanosheets as a highly effective photothermal material. More importantly, the presence of PR nanosheets imparts an excellent flame-retardant property to the PDAP−PR/PW composite films. The PDAP−PR/PW composite film can be self-extinguished within 2 s after the flame. Through an innovative integration of flexible polyphosphazene foam, PR nanosheets, and solid−liquid PCM to obtain a sensitive actuating response to light and heat, this study offers a new approach for developing multiactuated and eco-friendly flame-retardant shape memory materials to meet the requirement of applications with a requirement of fire safety in soft actuators, thermal therapy, control devices, and so on.

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“…As a novel two-dimensional (2D) semiconductor material, black phosphorus (BP) nanosheets have been widely used in fields such as catalysis, batteries, semiconductors, and sensors . Additionally, similar to other phosphorus-based flame retardants, they can impart excellent flame retardant properties to polymer matrices by trapping radicals in the gas phase and catalyzing char formation in the condensed phase . However, BP still faces the problems of environmental instability (i.e., the lone-pair electrons of P is sensitive to water and oxygen) and poor dispersion in the polymer matrices .…”

Section: Introductionmentioning

confidence: 99%

Uniformly-Dispersed Black Phosphorene as Flame-Retardant Epoxy Composites via Iterative Dispersion Strategy

Chu,

Wu,

Liu

et al. 2023

ACS Appl. Nano Mater.

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Black phosphorus (BP) nanosheets are widely used in flame retardant polymers, but the challenge of poor dispersion in polymers increases their additions and raises the cost of BP-based flame-retardant materials. Here, we propose an iterative dispersion strategy that gradually approaches a homogeneous dispersion state by separating aggregates and dispersions in the BP partial dispersion with multiple cycles. An iron(III) trifluoromethanesulfonate functionalized BP (BFF) is utilized for the flame retardant and reinforcing modification of the epoxy matrix to verify the reliability of this strategy, noting that the F element in BFF can achieve dynamic hydrogen bonds with the epoxy-amine system during the curing process, further promoting dispersion. Therefore, epoxy thermosets with only 0.2 wt % BFF loading achieve UL-94 V-0 level with a limiting oxygen index (LOI) of 29.2% through the synergistic effect of iterative dispersion and dynamic hydrogen bond. The formation of hydrogen bonds between BFF and the epoxy matrix also contributes to a significant increase in the mechanical properties. This work provides a reasonable and facile concept to achieve sufficient dispersion of inorganic nanosheets in polymer or organic matrices and also promotes the process of industrial large-scale manufacturing of BP-based fire-retardant materials.

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Size-dependent flame retardancy of black phosphorus nanosheets

Abstract: Two-dimensional black phosphorus (BP) nanosheets are potential flame-retardant nano-additives. Herein, the effects of the size of BP nanosheets embedded in epoxy resin (EP) on the flame retardancy are studied. BP...

Cited by 27 publications

References 45 publications

Renaissance of elemental phosphorus materials: properties, synthesis, and applications in sustainable energy and environment

Renaissance of elemental phosphorus materials: properties, synthesis, and applications in sustainable energy and environment

Eco-Friendly Flame-Retardant Phase-Change Composite Films Based on Polyphosphazene/Phosphorene Hybrid Foam and Paraffin Wax for Light/Heat-Dual-Actuated Shape Memory

Uniformly-Dispersed Black Phosphorene as Flame-Retardant Epoxy Composites via Iterative Dispersion Strategy

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