Improving fire safety and mechanical properties of waterborne polyurethane by montmorillonite-passivated black phosphorus

Yin, Sihao; Xue-ping, Ren; Zheng, Ruizhi; Li, Yongxiang; Zhao, Jianhui; Xie, Delong; Mei, Yi

doi:10.1016/j.cej.2023.142683

Cited by 45 publications

(6 citation statements)

References 47 publications

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“…These noncombustible gases serve dual roles by absorbing heat and concurrently diluting flammable gases and O 2 within the surrounding atmosphere [70]. In addition, phosphoruscontaining groups (e.g., PO•, and HPO•) could trap the highly reactive H• and HO• radicals to transform the nonflammable H 2 O and potential phosphorus derivatives (e.g., HPO 2 , HPO 3 , and PO 3 ) [71]. Furthermore, this orchestrated modification is instrumental in the development of protective layers, stemming from the synergistic interaction between MXene and PA.…”

Section: Flame-retardant Performance Of Balsa-derived Cpcmsmentioning

confidence: 99%

Leakage Proof, Flame-Retardant, and Electromagnetic Shield Wood Morphology Genetic Composite Phase Change Materials for Solar Thermal Energy Harvesting

Chen,

Meng,

Zhang

et al. 2024

Nano-Micro Lett.

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Phase change materials (PCMs) offer a promising solution to address the challenges posed by intermittency and fluctuations in solar thermal utilization. However, for organic solid–liquid PCMs, issues such as leakage, low thermal conductivity, lack of efficient solar-thermal media, and flammability have constrained their broad applications. Herein, we present an innovative class of versatile composite phase change materials (CPCMs) developed through a facile and environmentally friendly synthesis approach, leveraging the inherent anisotropy and unidirectional porosity of wood aerogel (nanowood) to support polyethylene glycol (PEG). The wood modification process involves the incorporation of phytic acid (PA) and MXene hybrid structure through an evaporation-induced assembly method, which could impart non-leaking PEG filling while concurrently facilitating thermal conduction, light absorption, and flame-retardant. Consequently, the as-prepared wood-based CPCMs showcase enhanced thermal conductivity (0.82 W m−1 K−1, about 4.6 times than PEG) as well as high latent heat of 135.5 kJ kg−1 (91.5% encapsulation) with thermal durability and stability throughout at least 200 heating and cooling cycles, featuring dramatic solar-thermal conversion efficiency up to 98.58%. In addition, with the synergistic effect of phytic acid and MXene, the flame-retardant performance of the CPCMs has been significantly enhanced, showing a self-extinguishing behavior. Moreover, the excellent electromagnetic shielding of 44.45 dB was endowed to the CPCMs, relieving contemporary health hazards associated with electromagnetic waves. Overall, we capitalize on the exquisite wood cell structure with unidirectional transport inherent in the development of multifunctional CPCMs, showcasing the operational principle through a proof-of-concept prototype system.

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Section: Flame-retardant Performance Of Balsa-derived Cpcmsmentioning

confidence: 99%

Leakage Proof, Flame-Retardant, and Electromagnetic Shield Wood Morphology Genetic Composite Phase Change Materials for Solar Thermal Energy Harvesting

Chen,

Meng,

Zhang

et al. 2024

Nano-Micro Lett.

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“…37,38 It is a strategy that the combination of organic flameretardant molecules and inorganic fillers can effectively avoid the migration of small molecules in the polymer matrix and strengthen the interaction between inorganic nanofillers and the polymer matrix. Chemical reaction [39][40][41] and electrostatic self-assembly technology 42,43 have been utilized to achieve the immobilization of organic flameretardant molecules on the surface of inorganic nanofillers. Specially, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) is a commonly used organophosphorus flame-retardant for EPs and can be utilized to achieve the surface functionalization of inorganic nanofillers because of its good reactivity, flame retardancy, and cheap price.…”

Section: Introductionmentioning

confidence: 99%

Natural halloysite nanotubes decorated with organophosphorous for highly flame‐resistant epoxy composites

Ruan,

Hu,

2024

Vinyl Additive Technology

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Highly flame‐resistant epoxy composites have important application value in many industrial fields. Unfortunately, epoxy resins (EPs) are inherently flammable materials and exhibit great fire hazard. In this study, the commercially available 9,10‐dihydro‐9‐oxa‐10‐phosphaphenanthrene‐10‐oxide (DOPO) was chemically immobilized on the surface of natural halloysite nanotubes (HNTs) via the linkage of vinyltrimethoxysilane to obtain a novel flame‐retardant VD@HNTs containing P/Si/Al elements. It was found that the flame‐retardant VD@HNTs can effectively improve the thermal stability and flame resistance of epoxy composites. Typically, when 10% of VD@HNTs is added in EP, the limiting oxygen index of as‐prepared VD@HNTs/EP composites reaches 30.3%, and it also successfully reaches V‐0 classification in the UL‐94 test. Besides, the ignition time of VD@HNTs/EP composites was enhanced from 42 s for pure EP to 60 s, and the maximum heat release rate was reduced from 1221 to 758 kW∙m−2. These great findings promise an innovative and efficient strategy for improving the fire safety of EP products and may also offer valuable insight toward fabricating various novel organic–inorganic flame retardants as well as highly flame‐resistant polymer composites.Highlights A novel flame‐retardant VD@HNTs containing P/Si/Al elements was prepared by the chemical decoration of HNTs with organophosphorous. The VD@HNT can effectively improve the thermal stability and flame resistance of epoxy composites. Synergistic flame‐retardant mechanism of phosphorus‐based flame retardants and natural HNTs was classified.

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“…In general, the way to achieve flame resistance of WPUs is to add fire retardants through physical blending or introduce flame-retardant groups through chemical reactions [ 6 , 7 ]. For reactive flame-retardant modification of WPUs, the main difficulties are that how to make the introduction of flame-retardant have no obvious influence on the preparation process of dispersions, including polymerization and emulsification, nor destroy the emulsion stability and mechanical properties [ 8 ]. Currently, many attempts and efforts have been put into practice, yet still suffered from many problems.…”

Section: Introductionmentioning

confidence: 99%

Robust, Flame-Retardant, and Anti-Corrosive Waterborne Polyurethane Enabled by a PN Synergistic Flame-Retardant Containing Benzimidazole and Phosphinate Groups

et al. 2023

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Waterborne polyurethanes (WPUs) have attracted great interest owing to their environmentally friendly properties, and are wildly applied in production and daily life. However, waterborne polyurethanes are flammable. Up to now, the challenge remains to prepare WPUs with excellent flame resistance, high emulsion stability, and outstanding mechanical properties. Herein, a novel flame-retardant additive, 2-hydroxyethan-1-aminium (2-(1H-benzo[d]imidazol-2-yl)ethyl)(phenyl)phosphinate (BIEP-ETA) has been synthesized and applied to improve the flame resistance of WPUs, which has both phosphorus nitrogen synergistic effect and the ability to form hydrogen bonds with WPUs. The WPU blends (WPU/FRs) exhibited a positive fire-retardant effect in both the vapor and condensed phases, with significantly improved self-extinguishing performance and reduced heat release value. Interestingly, thanks to the good compatibility between BIEP-ETA and WPUs, WPU/FRs not only have higher emulsion stability, but also have better mechanical properties with synchronously improved tensile strength and toughness. Moreover, WPU/FRs also exhibit excellent potential as a corrosion-resistant coating.

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Improving fire safety and mechanical properties of waterborne polyurethane by montmorillonite-passivated black phosphorus

Cited by 45 publications

References 47 publications

Leakage Proof, Flame-Retardant, and Electromagnetic Shield Wood Morphology Genetic Composite Phase Change Materials for Solar Thermal Energy Harvesting

Leakage Proof, Flame-Retardant, and Electromagnetic Shield Wood Morphology Genetic Composite Phase Change Materials for Solar Thermal Energy Harvesting

Natural halloysite nanotubes decorated with organophosphorous for highly flame‐resistant epoxy composites

Robust, Flame-Retardant, and Anti-Corrosive Waterborne Polyurethane Enabled by a PN Synergistic Flame-Retardant Containing Benzimidazole and Phosphinate Groups

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