Flame-retardancy and thermal properties of a novel phosphorus-modified PCM for thermal energy storage

Chen, Renjie; Huang, Xinyu; Zheng, Ruizhi; Xie, Delong; Mei, Yi; Zou, Ruqiang

doi:10.1016/j.cej.2019.122500

Cited by 67 publications

(37 citation statements)

References 50 publications

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“…As chemically cross-linked material, PEG-PU exhibits numerous advantages such as robust mechanical performance, excellent dimensional stability, intriguing energy storage ability, good chemical stability, and no leakage or gas generation during phase transition. − However, polymeric PEG-PU PCMs cannot be recycled, reprocessed, and self-healed due to their permanent cross-linking structure, which causing resource wasting, environmental pollution, and service life reduction. − These obstacles seriously impede PEG-PU-based PCMs from achieving fully sustainable and comprehensive development with long-term usability. Moreover, the high flammability of organic PCMs also greatly restricts its practical applications for TES, especially in thermoregulated textile, building construction, and electronic and electric industries. − Therefore, it is urgently required to explore form-stable PCM composites exhibiting simultaneous superior recyclability, good self-healing capability, and excellent flame retardancy. Introduction of phosphorus-containing substances (e.g., black phosphorus, organic phosphorus flame retardants, , and phosphorus-nitrogen flame retardants) into PCM composites was proved to be an effective approach to increase the flame retardancy of composite materials.…”

Section: Introductionmentioning

confidence: 99%

Recyclable, Self-Healing, and Flame-Retardant Solid–Solid Phase Change Materials Based on Thermally Reversible Cross-Links for Sustainable Thermal Energy Storage

Jin

Deng

et al. 2021

ACS Appl. Mater. Interfaces

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Conventional polymeric phase change materials (PCMs) exhibit good shape stability, large energy storage density, and satisfactory chemical stability, but they cannot be recycled and self-healed due to their permanent cross-linking structure. Additionally, the high flammability of organic PCMs seriously restricts their applications for thermal energy storage (TES). Therefore, it is urgently required to explore PCM composites exhibiting superior recyclability, good self-healing capability, and excellent flame retardancy simultaneously. Herein, tri-maleimide end-capped cyclotriphosphazene flame retardant (TMCTP) was synthesized via the nucleophilic substitution between 1,3,5,2,4,6-triazatriphosphorine-2,2,4,4,6,6-hexachloride and N-(2-hydroxyethyl)maleimide. Then, novel dynamically cross-linked PCM composites (FPCMs) with superior recyclability, good self-healing capability, and excellent flame retardancy were fabricated by bonding PEG and TMCTP to polymeric skeleton via reversible furan/maleimide Diels–Alder (DA) reaction. TMCTP, which covalently and dynamically binding in the polymeric FPCMs, acted not only as an efficient flame retardant for reducing the flammability of PCM composites but also as dynamic cross-linking skeletons for thermally induced self-healing and recycling. Differential scanning calorimetry (DSC) analysis confirmed the reversible energy storage and release ability of FPCMs. Due to its reversible DA covalent bonds, the introduction of TMCTP endowed the FPCMs with considerably increased self-healing efficiency (up to 93.1%) and recyclability efficiency (94.6%). Moreover, with the introduction of TMCTP into FPCMs, the heat release rate (HRR) and total heat release (THR) significantly decreased, while the char residue and limiting oxygen index (LOI) value increased, confirming that the flame retardancy of FPCMs greatly improved. Hence, the synthesized FPCMs show enormous potential in TES applications.

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Section: Introductionmentioning

confidence: 99%

Recyclable, Self-Healing, and Flame-Retardant Solid–Solid Phase Change Materials Based on Thermally Reversible Cross-Links for Sustainable Thermal Energy Storage

Jin

Deng

et al. 2021

ACS Appl. Mater. Interfaces

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“…These results also compare relatively favorably with other flame retardant modified PCMs 1–3 , which exhibit Δ H of 111.8, 116.9, and 186.9 J g −1 respectively. 31–33…”

Section: Resultsmentioning

confidence: 99%

Triazine derivatives as organic phase change materials with inherently low flammability

et al. 2022

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“…10,11 Phosphorus flame retardants can play the role in the gas and condense phase by suppressing combustion. [12][13][14] Nitrogen plays a flame retardant role by releasing non-flammable gas. 15 Leistner et al 16 adopted melamine polyphosphate to water-based chitosan, and samples displayed self-extinguishing properties in vertical burning test.…”

Section: Introductionmentioning

confidence: 99%

“…Especially, phosphorus and nitrogen‐based flame retardants exhibit highly effective synergistic effects in flame retardant polymers 10,11 . Phosphorus flame retardants can play the role in the gas and condense phase by suppressing combustion 12–14 . Nitrogen plays a flame retardant role by releasing non‐flammable gas 15 .…”

Section: Introductionmentioning

confidence: 99%

Metal‐organic frameworks derived ZnO@MOF@PZS flame retardant for reducing fire hazards of polyurea nanocomposites

Wang

Chen

Liu

et al. 2021

Polymers for Advanced Techs

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Transition metal as flame retardant has attracted intense interests in recent years. In this work, ZnO@MOF@PZS was prepared via hydrothermal and polycondensation methods. ZnO nanoflowers played the role as a template for growth of MOF@PZS and zinc source for formation of MOF. Subsequently, the obtained ZnO@MOF@PZS was mixed into polyurea (PUA) to investigate its flame retardancy and toxicity suppression properties. The cone calorimeter test (CCT) showed that ZnO@MOF@PZS significantly improved the flame retardancy of PUA composites. The addition of 3 wt% ZnO@MOF@PZS into PUA could result in peak heat release rate (PHRR), total heat release (THR) and total CO production (TCO) of 28.30%, 19.59% and 36.65%, respectively. The result of universal testing machine showed that ZnO@MOF@PZS‐add PUA had better mechanical properties. It is notable that the improved flame retardant properties for PUA composites are mainly attributed to ZnO@MOF@PZS promoting the formation of dense char residue.

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Flame-retardancy and thermal properties of a novel phosphorus-modified PCM for thermal energy storage

Cited by 67 publications

References 50 publications

Recyclable, Self-Healing, and Flame-Retardant Solid–Solid Phase Change Materials Based on Thermally Reversible Cross-Links for Sustainable Thermal Energy Storage

Recyclable, Self-Healing, and Flame-Retardant Solid–Solid Phase Change Materials Based on Thermally Reversible Cross-Links for Sustainable Thermal Energy Storage

Triazine derivatives as organic phase change materials with inherently low flammability

Metal‐organic frameworks derived ZnO@MOF@PZS flame retardant for reducing fire hazards of polyurea nanocomposites

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