Combustion forming hollow nanospheres as a ceramic fortress for flame-retardant fiber

Zhai, Gongxun; Zhou, Jialiang; Innocent, Mugaanire Tendo; Yu, Senlong; Pan, Weinan; Li, Lili; Zhu, Meifang

doi:10.1016/j.pnsc.2021.01.004

Cited by 11 publications

(3 citation statements)

References 37 publications

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“…This is due to the decomposition of polymers, which release volatiles. The formation of the residue can be a barrier to partially block the oxygen and heat from contacting the underlying matrix . The volatiles passed through the porous char structure, which extends the tortuous path and can play the great role in the condensed phase …”

Section: Resultsmentioning

confidence: 99%

Simultaneously Enhancing the Fire Retardancy and Heat Resistance of Stereo-Complex-Type Polylactic Acid

Liu

Zhang

et al. 2022

ACS Omega

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Polylactic acid (PLA) is considered to be the material with great application potential in the 21st century which has aroused wide research interest. However, PLA is a highly flammable material and exhibits low heat distortion temperature, which greatly limits its application in many fields. In this work, aluminum diethyl phosphinate (ADP) and poly ( d -lactic acid) (PDLA) are used to improve fire retardancy and heat resistance of poly ( l -lactic acid) (PLLA). PLLA/PDLA with the presence of 15 wt % ADP exhibited the limiting oxygen index (LOI) value at 26%, and the peak heat release rate (pHRR) and total heat release decreased, respectively, by 14.03 and 24.42% from 500 to 429 kW/m 2 and 86 to 65 MJ/m 2 . The melt dripping phenomenon was suppressed obviously. The addition of ADP realized the flame-retardant effect from both the condensed phase and gas phase. Moreover, the results showed that the addition of ADP promoted the formation of stereo crystals and increased the crystallization temperature to 175 °C. The heat distortion temperature (HDT) of the PLLA/PDLA sample with 15 wt % ADP can be as high as 170.4 °C, which marks significant improvement in the heat resistance of PLA. The mechanical property test results showed that ADP has little effect on the mechanical properties of the composites. This work opens a window to realize the heat-resistant and anti-dripping fire-retardant PLA.

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Section: Resultsmentioning

confidence: 99%

Simultaneously Enhancing the Fire Retardancy and Heat Resistance of Stereo-Complex-Type Polylactic Acid

Liu

Zhang

et al. 2022

ACS Omega

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“…However, the high flammability of pristine PET restricts its broad application to fields in which fire risk and fire hazard are a main concern. Among the current flame retardants available, metal flame retardants, such as aluminum hydroxide [ 2 ], magnesium hydroxide [ 3 ], metal oxide [ 4 , 5 ], and other metal ions [ 6 ], are still excellent flame-retardant candidates, with the advantages of low cost as well as high efficiency. Primarily, metal complexes, which generally contain organic ligands, especially including flame-retardant elements, endow materials with more flame-retardant properties and easy compatibility with polymer matrixes.…”

Section: Introductionmentioning

confidence: 99%

Thermal Degradation and Carbonization Mechanism of Fe-Based Metal-Organic Frameworks onto Flame-Retardant Polyethylene Terephthalate

Wang

2023

Polymers

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Currently, the metal-organic framework (MOF) is a promising candidate for flame−retardant polymers. In this study, a Fe−based MOF, MIL-88B(Fe), was introduced to polyethylene terephthalate (PET) and 3−hydroxyphenylphosphinyl-propanoic acid copolymer (P−PET) to reduce the fire hazard involved in using PET. The limiting oxygen indexes (LOIs) of MIL−PET and MIL−P−PET improved by 27% and 30%, respectively. The UL−94 level achieved for MIL−P−PET was V−0 rating. The thermal degradation and carbonization mechanisms of MIL−PET and MIL−P−PET were systematically investigated through thermogravimetric analysis coupled with a Fourier transform infrared spectroscopy (TG−IR), pyrolysis-gas chromatography−mass spectrometry (Py−GC−MS), x−ray photoelectron spectroscopy (XPS), and Raman spectrum combined with quantum chemical molecular dynamics simulation. With the addition of MIL−88B(Fe), high graphitization and a hard flammability char residual were generated. Compared with neat PET, the ferric ions efficiently catalyzed the homolytic cleavage and dehydrogenation of PET to produce a large amount of CO2 and terephthalic acid for MIL−PET in gas phase. Rough and hierarchical char residual with ferric oxide was also generated when temperatures exceeded 600 °C. However, the carbonization process was inhibited due to the coordinated complex between phosphorus and ferric ions in MIL−P−PET, invaliding the decarboxylation and generating more benzoic acid and its precursor, which led to heavy smoke.

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“…28,29 Many researchers have synthesised microcapsules and used them to obtain a composite phase change material, which although exhibits good phase change properties, have poor shear resistance, which greatly limits its application prospects. 30–32 Low heat resistance, shell strength, and dispersibility hinder the application of microcapsules in the field of melt-spun fibers. 33 The matrix materials supporting PCM, such as metal foam 34 and graphene oxide aerogel 35–37 have more promising heat resistance, but their three-dimensional structure makes them unsuitable for fiber formation.…”

Section: Introductionmentioning

confidence: 99%

Leak-free and shape-stabilized phase change composites with radial spherical SiO₂ scaffolds for thermal management

Zhang

Zhou²,

Chen

et al. 2022

New J. Chem.

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Combustion forming hollow nanospheres as a ceramic fortress for flame-retardant fiber

Cited by 11 publications

References 37 publications

Simultaneously Enhancing the Fire Retardancy and Heat Resistance of Stereo-Complex-Type Polylactic Acid

Simultaneously Enhancing the Fire Retardancy and Heat Resistance of Stereo-Complex-Type Polylactic Acid

Thermal Degradation and Carbonization Mechanism of Fe-Based Metal-Organic Frameworks onto Flame-Retardant Polyethylene Terephthalate

Leak-free and shape-stabilized phase change composites with radial spherical SiO₂ scaffolds for thermal management

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Combustion forming hollow nanospheres as a ceramic fortress for flame-retardant fiber

Cited by 11 publications

References 37 publications

Simultaneously Enhancing the Fire Retardancy and Heat Resistance of Stereo-Complex-Type Polylactic Acid

Simultaneously Enhancing the Fire Retardancy and Heat Resistance of Stereo-Complex-Type Polylactic Acid

Thermal Degradation and Carbonization Mechanism of Fe-Based Metal-Organic Frameworks onto Flame-Retardant Polyethylene Terephthalate

Leak-free and shape-stabilized phase change composites with radial spherical SiO2 scaffolds for thermal management

Contact Info

Product

Resources

About

Leak-free and shape-stabilized phase change composites with radial spherical SiO₂ scaffolds for thermal management