MOFs-derived self-sacrificing template strategy to double-shelled metal oxides nanocages as hierarchical interfacial catalyst for suppressing smoke and toxic gases releases of epoxy resin

Wang, Junling; Wei, Yanan; Wang, Zhirong; He, Xinrui; Wang, Chao; Lin, Haiqing; Deng, Yingxuan

doi:10.1016/j.cej.2021.134328

Cited by 71 publications

(15 citation statements)

References 75 publications

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“…This indicates that EP/BN-PDA-MXene has the highest degree of graphitization. The lateral graphitic crystallite size (La) is proportional to the degree of graphitization and can be calculated by the Tuinstra–Koening relationship: …”

Section: Results and Discussionmentioning

confidence: 99%

Column-to-Beam Architecture Inspires Interface-Engineered MXene Nanosheet/Boron Nitride Nanosheet/Polydopamine Hybrids for Fire Retardants

Luo

Gong

Pan

et al. 2022

ACS Appl. Nano Mater.

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Thermosetting epoxy resin (EP) has a high fire hazard that generates a lot of heat and toxic fumes, which is considered a prominent drawback that limits the practical application of EP. Therefore, inspired by the column-to-beam architecture, the BN-PDA-MXene nanohybrid was developed via covalent cross-linking and hydrogen bonding. The results showed that the stable column-to-beam architecture not only prevented the stacking of 2D nanosheets but also built a labyrinth-type array in the EP matrix, which was beneficial to enhancing the thermal stability and flame-retardant performance of EP composites. In particular, with the addition of the 2% BN-PDA-MXene nanohybrid, the maximum mass loss rate (MLRmax) of the EP composite was reduced and the char residue increased. Meanwhile, compared with pure EP, there was a marked reduction of 22.2% in the peak heat release rate, demonstrating the suppressed heat release. Furthermore, EP/BN-PDA-MXene had excellent smoke suppression performance, which was mainly reflected by the downward trend of the peak smoke production rate, total smoke production, and peak CO production rate, together with an obvious reduction of 39.9% in smoke factor. By studying the char residue, it was confirmed that the BN-PDA-MXene nanohybrid had a certain inhibitory effect on the fire hazard of EP due to its lamellar barrier effect, as well as the catalytic detoxification and catalytic carbonization of transition elements.

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Section: Results and Discussionmentioning

confidence: 99%

Column-to-Beam Architecture Inspires Interface-Engineered MXene Nanosheet/Boron Nitride Nanosheet/Polydopamine Hybrids for Fire Retardants

Luo

Gong

Pan

et al. 2022

ACS Appl. Nano Mater.

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“…Aromatic compounds tended to gradually accumulate and aggregate in the gas phase to form smoke particles, which was one of the main causes of smoke formation. When the polymer was burnt in the presence of BP-OH-GO, the release of aromatic compounds was significantly reduced, showing a highly efficient inhibition of smoke release. − In addition, the inhibition of BP-OH-GO 15 was better than that of BP-OH 15 owing to the labyrinth effect of GO. By the TG-IR results, this demonstrated that adding BP-OH-GO suppressed the polymer fire toxicity efficiently.…”

Section: Resultsmentioning

confidence: 99%

Nanolayered Graphene/Black Phosphorus Films for Fire-Retardant Coatings

Yang

Qiu

Zhou

et al. 2022

ACS Appl. Nano Mater.

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As one of typical bottom-up self-assembly natural materials, the abalone nacre with a special layered “brick-and-mortar” structure exhibited unique physical and chemical properties. Inspired by this structure, we developed a biomimetic material by combining linear polyvinyl alcohol (PVA) with hydroxyl-functionalized black phosphorus (BP-OH) nanosheets and graphene oxide (GO) nanosheets in an evaporation-induced self-assembly method. Owing to the strong interfacial hydrogen bond between linear PVA and two-dimensional BP-OH-GO, the PVA/BP-OH-GO 25 composite film exhibited outstanding mechanical properties, with tensile fracture strain up to 86.6% and tensile strength up to 74.3 MPa (1.63 and 2.14 times that of pure PVA, respectively). In addition, the toughness of the PVA/BP-OH-GO 25 film reached 2–3 times that of pure PVA, achieving the purpose of increasing strength and toughness simultaneously. In addition, the composite film also achieved admirable fire resistance, thermal stability, smoke suppression, and toxicity reduction performance. Therefore, a type of bionic PVA/BP/GO film was designed and prepared, which provided a direction for designing synthetic biomimetic composite materials with high fire safety and mechanical properties.

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“…ZIF-67 is a classic Co complex equipped with a zeolitic imidazolate framework that has been thoroughly applied to boost the flame retardancy of polymers by our group and other researchers. − Practice has proven that ZIFs by themselves show indistinctive flame retardant efficiency probably caused by the flammable organic ligand in the framework . To overcome this dilemma, ZIFs should be modified to endow them with a synergistic flame retardant effect. , …”

Section: Introductionmentioning

confidence: 99%

“…17 this dilemma, ZIFs should be modified to endow them with a synergistic flame retardant effect. 18,19 Phosphorous-and nitrogen-containing compounds are nearly always chosen to marry with ZIFs to enhance efficiency. Among them, cyclomatrix polyphosphazenes (PZS) are extremely attractive because of their special chemical construction and physical structure, where the monomer is flexible enough to react with diversified organic matter, obtaining functional inorganic−organic hybrids with different dimensional morphologies.…”

Section: Introductionmentioning

confidence: 99%

Precise Control of a Yolk-Double Shell Metal–Organic Framework-Based Nanostructure Provides Enhanced Fire Safety for Epoxy Nanocomposites

Hou

Song

Rehman

et al. 2022

ACS Appl. Mater. Interfaces

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Nanomaterials derived from metal–organic frameworks (MOFs) are highly promising as future flame retardants for polymeric materials. The precise control of the interface for polymer nanocomposites is taking scientific research by storm, whereas such investigations for MOF-based nanofillers are rare. Herein, a novel yolk-double shell nanostructure (ZIF-67@layered double hydroxides@polyphophazenes, ZIF@LDH@PZS) was subtly designed and introduced into epoxy resin (EP) as a flame retardant to fill the vacancy of yolk/shell construction in the field. Meanwhile, the interface of the polymer nanocomposites can be further accurately tailored by the outermost layer of the nanofillers from PZS to Ni(OH)2 (NH), by which hollow nanocages with treble shells (LDH@PZS@NH) were obtained. It is remarkably interesting that LDH@PZS@NH endows the EP with the lowest peak of heat release rate in the cone calorimeter test, but the total heat and smoke releases (THR and TSP) of the nanocomposites are even higher than those of the neat polymer. In contrast, EP blended with ZIF@LDH@PZS shows outstanding comprehensive performance: with 2 wt.%, the limiting oxygen index is increased to 29.5%, and the peak heat release rate is reduced by 26.0%. The impact and flexural strengths are slightly lowered, while the storage modulus is enhanced remarkably compared with that for neat EP. The flame retardant mechanism is systematically explored focusing on the interfacial interactions of different hybrids within the epoxy matrix, ushering in a new stage of study of nanostructural design-guided interface manipulation in MOF-based polymer nanocomposites.

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MOFs-derived self-sacrificing template strategy to double-shelled metal oxides nanocages as hierarchical interfacial catalyst for suppressing smoke and toxic gases releases of epoxy resin

Cited by 71 publications

References 75 publications

Column-to-Beam Architecture Inspires Interface-Engineered MXene Nanosheet/Boron Nitride Nanosheet/Polydopamine Hybrids for Fire Retardants

Column-to-Beam Architecture Inspires Interface-Engineered MXene Nanosheet/Boron Nitride Nanosheet/Polydopamine Hybrids for Fire Retardants

Nanolayered Graphene/Black Phosphorus Films for Fire-Retardant Coatings

Precise Control of a Yolk-Double Shell Metal–Organic Framework-Based Nanostructure Provides Enhanced Fire Safety for Epoxy Nanocomposites

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