Effect of Bio‐Based Cobalt Alginate on the Fire Safety and Mechanical Properties for Epoxy Resin

Liu, Chang; Tao, Ye; Xu, Ying‐Jun; Liu, Yun; Zhu, Ping; Wang, Yu‐Zhong

doi:10.1002/mame.202100466

Cited by 18 publications

(8 citation statements)

References 56 publications

(41 reference statements)

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“…On the basis of the condensed and gaseous phase analysis, a feasible flame retardant mechanism is proposed as follows for the ZIF-based hybrid flame retardant prepared in this work. ZIF@LDH@PZS played its role in both the condensed and gaseous phases, and specifically speaking, in the condensed phase, the transition metals Ni and Co derived from LDH catalyzed char formation together with the phosphoric acid generated by PZS. , Meanwhile, the decomposition process of the LDH is endothermic, thus cooling the flame zone to mitigate the burning degree. When the metals migrated to the flame zone, some parts reacted with phosphoric acid to form metal phosphates, and other parts formed metal oxides as coverage on the surface .…”

Section: Resultsmentioning

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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Section: Resultsmentioning

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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“…CO 2 and CO production are also investigated to research the toxicity of the burning products. 40 From Figure 3e,f, both CO 2 production rate (CO 2 P) and CO production rate (COP) of EP are comparatively higher, while those of FR-EPs are much lower. Besides, EP/AlPi 9.5 -Nickel Alginate 0.5 presents the lowest CO 2 P and COP, indicating the suitable nickel alginate amount can suppress the smoke release of EP/AlPi, and that the synergistic effect between AlPi and nickel alginate exists.…”

Section: Cone Calorimeter Testmentioning

confidence: 90%

Nickel alginate‐enhanced fire safety of aluminum diethylphosphinate on epoxy resin

Liu

et al. 2022

J of Applied Polymer Sci

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To attain superior fire safety epoxy resins (EP), aluminum diethylphosphonate (AlPi) and nickel alginate were incorporated to EP in different proportions. The synergistic flame retardant effects between AlPi and nickel alginate on fire safety and mechanical properties of EP were investigated in detail. EP/AlPi9.5‐Nickel Alginate0.5 acquired the UL‐94 V‐0 rating with the highest limiting oxygen index value (28.9%). Besides, the thermal decomposition behaviors of the samples were researched by thermogravimetric analysis, implying that EP/AlPi‐Nickel Alginate exhibited the better thermal stability and char‐forming ability. Compared with EP, the peak heat release rate and total heat release were declined by 58.3% and 12.8%. And the addition of nickel alginate reduced the release of smoke. In particular, the incorporation of AlPi and nickel alginate increased the impact strength, flexural strength and glass transition temperature of EP. In perspective, the synergistic effect of bio‐based nickel alginate and AlPi opens a practicable avenue in decreasing the fire risk and improving the mechanical properties of EP.

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“…Nabipour et al prepared a zinc-containing triazole complex for EP flame retardant, which reduced the peak heat release rate (PHRR) of EP by 72.9% . Liu et al prepared the complexes derived from sodium alginate with Fe 3+ and Ni 2+ , respectively, and the results showed that the total smoke production (TSP) of the modified EP was reduced by 42.2 and 56.3%, respectively. , Nabipour et al introduced guanazole–metal complexes into cotton; the modified cotton exhibited flame retardant and antibacterial properties . Yu et al prepared fire-preventing triple-network hydrogels with poly( N -isopropylacrylamide)/sodium alginate/poly(vinyl alcohol) and used them to improve the flame retardancy and antibacterial properties of cotton fabrics .…”

Section: Introductionmentioning

confidence: 99%

Chitosan–Fe(III) Complexes via Green Preparation toward Flame Retardant and High-Mechanical-Strength Epoxy Composites

Zhou

Wang

et al. 2022

ACS Sustainable Chem. Eng.

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Biobased flame retardants with facile preparation, high performance in smoke suppression, and mechanical reinforcement toward epoxy resins are worth exploring for feasible sustainability. Although some chitosan-containing flame retardants have been successfully developed so far, the synthesis processes for most of them require the use of large volumes of organic solvents and give low synthetic yields. Herein, we report a facile, green, and high-yielding strategy for the synthesis of chitosan−metal complex flame retardants (CS−Fe) by coordination of chitosan with Fe(III) in water. The results show that incorporating 9 wt % CS−Fe enables the EP composites to pass the UL-94 V-1 rating with a limiting oxygen index (LOI) of 29.5%. At the same time, the peak heat release rate, peak smoke production, total smoke production, peak CO production, and fire growth rate of EP/9CS−Fe are significantly reduced, indicating good flame retardancy. Remarkably, the prepared CS−Fe enhanced both the strength and toughness of EP due to the homogeneous dispersion of CS−Fe and the presence of a reaction between CS−Fe and the EP matrix. This work provides a simple and economic strategy for the green preparation of chitosan-based flame retardants with high efficiency.

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Effect of Bio‐Based Cobalt Alginate on the Fire Safety and Mechanical Properties for Epoxy Resin

Cited by 18 publications

References 56 publications

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

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

Nickel alginate‐enhanced fire safety of aluminum diethylphosphinate on epoxy resin

Chitosan–Fe(III) Complexes via Green Preparation toward Flame Retardant and High-Mechanical-Strength Epoxy Composites

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