Interface engineering of MXene towards super-tough and strong polymer nanocomposites with high ductility and excellent fire safety

Shi, Yongqian; Liu, Chuan; Duan, Zaipeng; Yu, Bin; Liu, Minghua; Song, Pingan

doi:10.1016/j.cej.2020.125829

Cited by 249 publications

(124 citation statements)

References 62 publications

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“…In general, a compact and graphitic carbon layer can prevent mass/heat transfer between the gas and the condensed phase [ 37 ]. The carbonaceous char quality of the samples tested after VF was characterized by Raman spectroscopy.…”

Section: Resultsmentioning

confidence: 99%

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Suppression of Smoldering of Calcium Alginate Flame-Retardant Paper by Flame-Retardant Polyamide-66

Tian

Cao

et al. 2021

Polymers

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Calcium alginate (Ca-Alg) fibers are renewable fibers obtained from the ocean with essential flame retardancy, which have recently been applied as components of flame-retardant paper. However, the application of Ca-Alg fibers is limited because of their tendency to smolder. Therefore, composites papers were fabricated by blending using flame-retardant polyamide-66 (FR-PA), with a 5 wt% content of phosphorous flame retardant, which will form molten carbon during combustion. When the FR-PA content is 30% of the composite paper, FR-PA forms a compact carbon layer on the surface of the Ca-Alg fibers during combustion, which isolates the mass/heat transfer and effectively suppresses the smoldering of Ca-Alg. This consists of a condensed flame retardant mechanism. Furthermore, the combustion and thermal degradation behavior of paper were analyzed by cone calorimetry (CONE), TG and TG-IR. Ca-Alg in the composite paper decomposed and released CO2 before ignition, which delayed the ignition time. Simultaneously, the FR-PA contained in the composite paper effectively inhibited the combustion of volatile combustibles in the gas phase. Overall, FR-PA and Ca-Alg improve the thermal stability of the composite paper in different temperature regions under air atmosphere. Ca-Alg reduces the formation of aromatic products and NH3 in the composite paper under N2 atmosphere. Ca-Alg-based paper with excellent flame retardancy was successfully prepared.

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Section: Resultsmentioning

confidence: 99%

“…The graphitization degree of the char residues was evaluated by an integrated area ratio of the D and G bands (I D /I G ). Low I D /I G values of char translate into a high graphitization degree [ 37 ]. The char residue of FR-PA/Ca-Alg (20/80) shows the highest graphitization degree, followed by FR-PA/Ca-Alg (10/90) and FR-PA/Ca-Alg (30/70).…”

Section: Resultsmentioning

confidence: 99%

Suppression of Smoldering of Calcium Alginate Flame-Retardant Paper by Flame-Retardant Polyamide-66

Tian

Cao

et al. 2021

Polymers

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“…Cone calorimeter is an effective technique to evaluate the combustion properties of the polymeric materials [ 46 , 47 , 48 ]. The results of cone calorimeter testing for RPUF and its composites are portrayed in Figure 3 and Figure 4 , and corresponding cone data are listed in Table 3 .…”

Section: Resultsmentioning

confidence: 99%

Enhanced Fire Safety of Rigid Polyurethane Foam via Synergistic Effect of Phosphorus/Nitrogen Compounds and Expandable Graphite

et al. 2020

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In order to explore highly efficient flame-retardant rigid polyurethane foam (RPUF), phosphorus/nitrogen compounds and expandable graphite (EG) were successfully incorporated into RPUF by a free one-spot method. The combustion results showed that the fire safety of the RPUF samples was remarkably improved by the addition of phosphoric/nitrogen compounds and EG. With the incorporation of 22.4 wt.% phosphorus/nitrogen compounds and 3.2 wt.% EG, the RPUF composites achieved UL-94 V-0 rating. Besides, the total heat release and total smoke release of RPUF composites were reduced by 29.6% and 32.4% respectively, compared to those of the pure RPUF sample. PO• and PO2• together with nonflammable gaseous products were evolved from phosphoric/nitrogen compounds in the gas phase, which quenched the flammable free radicals in the matrix and diluted the concentration of combustible gaseous products generated from PRUF during combustion. The compact char residues which acted as excellent physical barriers were formed by catalysis of EG and phosphoric/nitrogen compounds in the condense phase. The fire hazard of RPUF was significantly reduced by the synergistic effect of phosphorus-nitrogen compounds and EG. This work provides a promising strategy to enhance the fire safety of RPUF.

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“…Therefore, the research boom of 2-D layered nanomaterials with similar structures with graphene has been rising in recent years. Some studies have shown that 2-D layered materials (e.g., MoS 2 , GO) can improve the thermal stability and flame retardancy of polymer materials (Huang et al, 2012 ; Liao et al, 2012 ; Maddalena et al, 2018 ; Shi et al, 2019 , 2020 ). The improvement of thermal stability and flame retardant is mainly due to the blocking effect of 2-D layered structure, which can effectively prevent the volatilization of combustible gas and oxygen diffusion, and delay mass loss.…”

Section: Introductionmentioning

confidence: 99%

Polydopamine-Bridged Synthesis of Ternary h-BN@PDA@TiO2 as Nanoenhancers for Thermal Conductivity and Flame Retardant of Polyvinyl Alcohol

Wang

2020

Front. Chem.

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In this study, h-BN@PDA@TiO 2 hybrid nanoparticles were prepared and used as functional fillers to prepare PVA nanocomposites, and the effects of hybrid particles on PVA thermal conductivity and flame retardant properties were studied. The results showed that hybrid particles could significantly improve the thermal conductivity and flame retardant performance of PVA composites, and effectively inhibit the release of toxic gases such as combustible pyrolysis products and CO, which enhanced the fire safety of PVA composites. When the addition amount of hybrid particles is 5 wt%, the thermal conductivity of PVA composites is 239.1% higher than that of the pure PVA and the corresponding temperature of PVA composites with a mass loss of 5 wt% was 16.2°C higher than that of the pure PVA. This is due to the barrier effect of h-BN and the protective effect of dense carbon layer catalyzed by TiO 2 .

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Interface engineering of MXene towards super-tough and strong polymer nanocomposites with high ductility and excellent fire safety

Cited by 249 publications

References 62 publications

Suppression of Smoldering of Calcium Alginate Flame-Retardant Paper by Flame-Retardant Polyamide-66

Suppression of Smoldering of Calcium Alginate Flame-Retardant Paper by Flame-Retardant Polyamide-66

Enhanced Fire Safety of Rigid Polyurethane Foam via Synergistic Effect of Phosphorus/Nitrogen Compounds and Expandable Graphite

Polydopamine-Bridged Synthesis of Ternary h-BN@PDA@TiO2 as Nanoenhancers for Thermal Conductivity and Flame Retardant of Polyvinyl Alcohol

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